Portland-Hillsboro, Oregon Weather Conditions

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Current Conditions

  • 56°
  • Light Rain
  • Wind: South 8 mph
  • Humidity: 97%
  • Visibility: 10.0 miles
  • Dew Point: 55°
  • Pressure: 29.64 in. 0

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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Rain
  • High: 54 °
  • Low: 45 °
  • Rain
  • Monday
  • Chance of Rain
  • High: 52 °
  • Low: 41 °
  • Chance of Rain
  • Tuesday
  • Chance of Rain
  • High: 52 °
  • Low: 39 °
  • Chance of Rain
  • Wednesday
  • Chance of Rain
  • High: 54 °
  • Low: 30 °
  • Chance of Rain
  • Thursday
  • Chance of Rain
  • High: 45 °
  • Low: 34 °
  • Chance of Rain

Forecast for Portland-Hillsboro, Oregon

Updated: 7:00 PM PST on December 20, 2014

  • Saturday

    Overcast with rain. High of 55F. Breezy. Winds from the South at 15 to 20 mph. Chance of rain 100% with rainfall amounts near 0.6 in. possible.

  • Saturday Night

    Overcast with rain. Low of 52F. Winds from the SSW at 5 to 15 mph. Chance of rain 100% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Overcast with rain. High of 54F. Winds from the West at 5 to 10 mph. Chance of rain 100%.

  • Sunday Night

    Overcast with a chance of rain. Low of 45F. Winds less than 5 mph. Chance of rain 50%.

  • Monday

    Overcast with a chance of rain in the morning, then partly cloudy with a chance of rain. Fog early. High of 52F. Winds less than 5 mph. Chance of rain 30%.

  • Monday Night

    Overcast with a chance of rain. Fog overnight. Low of 41F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday

    Mostly cloudy with a chance of rain. High of 52F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday Night

    Mostly cloudy in the evening, then overcast with a chance of rain. Fog overnight. Low of 39F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.3 in. possible.

  • Wednesday

    Overcast with a chance of rain. Fog early. High of 54F. Winds from the West at 5 to 10 mph shifting to the SSW in the afternoon. Chance of rain 70% with rainfall amounts near 0.5 in. possible.

  • Wednesday Night

    Overcast with a chance of snow. Fog overnight. Low of 30F. Winds less than 5 mph. Chance of snow 40%.

  • Thursday

    Mostly cloudy with a chance of rain. Fog early. High of 45F. Winds less than 5 mph. Chance of rain 50%.

  • Thursday Night

    Overcast. Fog overnight. Low of 34F. Winds less than 5 mph.

  • Friday

    Mostly cloudy. Fog early. High of 45F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy with a chance of rain. Fog overnight. Low of 34F. Winds less than 5 mph. Chance of rain 20%.

  • Saturday

    Mostly cloudy with a chance of rain. High of 45F. Winds less than 5 mph. Chance of rain 20%.

  • Saturday Night

    Overcast with a chance of snow. Fog overnight. Low of 34F. Winds less than 5 mph. Chance of snow 50%.

  • Sunday

    Partly cloudy with a chance of rain. Fog early. High of 45F. Winds less than 5 mph. Chance of rain 20%.

  • Sunday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 28F. Winds less than 5 mph. Chance of rain 20%.

  • Monday

    Partly cloudy. High of 43F. Winds from the East at 5 to 10 mph.

  • Monday Night

    Partly cloudy. Low of 25F with a windchill as low as 19F. Winds from the East at 5 to 10 mph.

  • Tuesday

    Clear. High of 41F. Winds from the East at 5 to 10 mph.

  • Tuesday Night

    Clear. Low of 25F. Winds from the East at 5 to 10 mph.

  • Wednesday

    Clear. High of 41F. Winds from the East at 5 to 10 mph.

Severe Weather Alert Descriptions

 Flood Warning  Statement as of 6:31 PM PST on December 20, 2014


The National Weather Service in Portland has issued a

* Flood Warning for
the Sandy River near Bull Run.
* From Sunday morning to Monday morning... or until the warning is
cancelled.
* At 5 PM Saturday the stage was... 11.1 feet / 4600 cfs.
* Flood stage is 19.3 feet and flood flow is 42000 cfs.
* Minor flooding is forecast.
* Forecast... this river is forecast to rise above flood stage around
9 am Sunday and is expected to crest near 21.0 ft around 4 PM Sunday.
* Impact... above 19.3 feet, expect areas of significant bank erosion
and some minor flooding over lowlands along the river.


Lat... Lon 4540 12226 4542 12222 4550 12227 4554 12237 4553 12239





631 PM PST Sat Dec 20 2014

The National Weather Service in Portland has issued a

* Flood Warning for
the Clackamas river near Oregon City.
* From Sunday morning to Monday evening... or until the warning is
cancelled.
* At 5 PM Saturday the stage was... 26.1 feet / 3900 cfs.
* Flood stage is 39.0 feet and flood flow is 40000 cfs.
* Major flooding is forecast.
* Forecast... this river is forecast to rise above flood stage around
7 am Sunday and is expected to crest near 46.2 ft around 4 PM Sunday.
* Impact... above 46 feet, expect major flooding of some residences and
buildings along the lower Clackamas river, including the Mobile
Home Park just downstream of Carver bridge.


Lat... Lon 4538 12250 4537 12260 4539 12260 4541 12256 4541 12249




631 PM PST Sat Dec 20 2014

The National Weather Service in Portland has issued a

* Flood Warning for
the Clackamas river at Estacada.
* From late tonight to late Monday night... or until the warning is
cancelled.
* At 5 PM Saturday the stage was... 13.3 feet / 4200 cfs.
* Flood stage is 20.0 feet and flood flow is 23300 cfs.
* Major flooding is forecast.
* Forecast... this river is forecast to rise above flood stage around
2 am Sunday and is expected to crest near 26.5 ft around 4 PM Sunday.
* Impact... above 25 ft, expect major flood damage at Parks along the
river. Also expect flooding in Carver, along with numerous homes
along the Clackamas river from Estacada downstream to the
confluence with the Willamette.


Lat... Lon 4529 12235 4536 12243 4538 12250 4541 12249 4539 12239





 Areal Flood Watch  Statement as of 8:21 am PST on December 20, 2014


... Flood Watch remains in effect from 4 PM PST this afternoon
through Monday afternoon for southwest Washington and northwest
Oregon...

The Flood Watch continues for southwest Washington and northwest
Oregon from 4 PM PST this afternoon through Monday afternoon.


A classic atmospheric river type precipitation event is setting up
over the Pacific northwest today... which will continue to impact
the region into early Monday. A very long fetch of moisture with
origins west to the South China Sea is feeding into this
system... bringing the potential for very large rainfall totals
across the region. A deep and moist westerly flow will develop
today and continue through Sunday. With the flow forecasted to
remain perpendicular to the Coast Range and Cascades for an
extended period of time... expect strong orographic enhancement to
lead to the highest rainfall totals over the mountains. The Coast
Range... foothills and Cascades are expected to see in the range of
6 to 12 inches of rain... with locally higher amounts possible.
Lower but still significant totals are expected for the lower
terrain. Projected rainfall along the coast is forecasted to be
around 4 to 8 inches. The interior lowlands should see 1 to 4
inches... with the highest amounts closer to the Cascade foothills.

Given the latest forecasted rainfall totals... it appears that
there is the strong potential for flooding over the weekend on
numerous rivers and tributaries draining the Coast Range and
Cascades. A few rivers may even reach major flood stage. The
Current River stage forecasts indicate that the faster responding
rivers could reach flood stage as early as tonight. There are also likely
to be impacts from Urban and Small Stream flooding and flooding
along low lying pasture land.

In addition to the flooding concerns... excessive rainfall has the
potential to create landslides... debris flows... and excessive runoff
in the vicinity of recent wildfire burn scars. Burn scars from two
large fires this Summer... the 36 pit fire in the Clackamas river
basin near Estacada and the deception complex near Oakridge... will
be particularly vulnerable.


Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

Landslides and debris flows are possible during this flood event.
People... structures and roads located below steep slopes... in
canyons and near the mouths of canyons may be at serious risk
from rapidly moving landslides.

You should monitor later forecasts and be alert for possible
flood warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

The next update for this watch will be issued by 10 PM Saturday
night.





 Public Information Statement  Statement as of 5:12 PM PST on December 20, 2014



... Latest and heaviest 24 hour rainfall reports by region...

Location amount time/date lat/Lon

... South Washington coast...
1 N Klipsan Beach (36 ft) 1.79 in 0438 PM 12/20 46.48n/124.05w
Long Beach 1.70 in 0418 PM 12/20 46.35n/124.05w
1 ENE Long Beach (6 ft) 1.67 in 0436 PM 12/20 46.36n/124.03w

... North Oregon coast...
Tillamook (11 ft) 4.01 in 0412 PM 12/20 45.46n/123.80w
Tillamook Airport (36 ft) 3.41 in 0355 PM 12/20 45.42n/123.82w
Wilson r at Tillamook (10 ft 2.80 in 0400 PM 12/20 45.48n/123.81w
W f Satsop river (300 ft) 2.44 in 0430 PM 12/20 46.18n/123.56w
Pacific City (27 ft) 2.40 in 0438 PM 12/20 45.20n/123.97w
3 SW Sandlake (13 ft) 2.39 in 0428 PM 12/20 45.26n/123.95w
Astoria Airport (9 ft) 2.35 in 0355 PM 12/20 46.16n/123.88w
2 E Oceanside (1420 ft) 2.24 in 0437 PM 12/20 45.47n/123.92w
1 WSW Astoria (240 ft) 1.98 in 0400 PM 12/20 46.18n/123.84w
Knappa (104 ft) 1.71 in 0429 PM 12/20 46.17n/123.58w
1 ESE Pacific City (252 ft) 1.68 in 0438 PM 12/20 45.18n/123.93w
Oceanside (21 ft) 1.64 in 0433 PM 12/20 45.46n/123.97w
Cannon Beach (22 ft) 1.59 in 0430 PM 12/20 45.89n/123.96w

... Central Oregon coast...
1 NW Yachats (32 ft) 3.30 in 0439 PM 12/20 44.32n/124.11w
1 se Florence (45 ft) 3.18 in 0432 PM 12/20 43.98n/124.09w
2 NNE Yachats (81 ft) 2.77 in 0438 PM 12/20 44.34n/124.09w
1 NNE Lincoln Beach (72 ft) 2.70 in 0433 PM 12/20 44.87n/124.04w
dunes (120 ft) 2.65 in 0404 PM 12/20 43.96n/124.12w
1 S Otter Rock (141 ft) 2.32 in 0440 PM 12/20 44.72n/124.06w
Newport Muni ap 2.30 in 0355 PM 12/20 44.58n/124.05w
Newport (127 ft) 2.29 in 0438 PM 12/20 44.64n/124.06w
2 N Lincoln City (88 ft) 2.18 in 0438 PM 12/20 45.01n/124.01w
Waldport (164 ft) 1.80 in 0432 PM 12/20 44.42n/124.07w

... Willapa Hills...
Abernathy mtn (2000 ft) 2.72 in 0401 PM 12/20 46.35n/123.10w
Rock Creek (1445 ft) 2.46 in 0430 PM 12/20 46.53n/123.40w
Huckleberry Ridge (2424 ft) 2.39 in 0411 PM 12/20 46.50n/123.38w
Brooklyn (1036 ft) 1.80 in 0430 PM 12/20 46.73n/123.55w
Frances (231 ft) 1.40 in 0230 PM 12/20 46.54n/123.50w

... Coast Range of northwest Oregon...
Tillamook 8 ENE (71 ft) 5.03 in 0430 PM 12/20 45.48n/123.72w
Lees Camp (654 ft) 5.00 in 0400 PM 12/20 45.59n/123.52w
4 E Hebo (3160 ft) 4.93 in 0439 PM 12/20 45.21n/123.75w
4 ESE Hebo (2220 ft) 4.82 in 0410 PM 12/20 45.21n/123.77w
Rye Mountain (2000 ft) 4.65 in 0414 PM 12/20 45.22n/123.53w
South Fork (2256 ft) 4.11 in 0412 PM 12/20 45.60n/123.48w
Nehalem river nr Foss (40 ft 3.46 in 0400 PM 12/20 45.70n/123.75w
1 WNW Jewell (569 ft) 3.30 in 0400 PM 12/20 45.94n/123.53w
Tidewater (2035 ft) 3.06 in 0414 PM 12/20 46.01n/123.56w
Miller (1030 ft) 1.75 in 0412 PM 12/20 46.02n/123.27w
Nehalem river nr Vernonia 1.23 in 0415 PM 12/20 45.81n/123.28w

... Central Coast Range of western Oregon...
2 NNW Mapleton (41 ft) 3.80 in 0230 PM 12/20 44.06n/123.88w
Cannibal Mountain (1939 ft) 3.53 in 0403 PM 12/20 44.35n/123.89w
Summit (746 ft) 3.10 in 0400 PM 12/20 44.63n/123.58w
grande ronde (395 ft) 2.90 in 0400 PM 12/20 45.05n/123.62w
Village Creek (1565 ft) 2.72 in 0353 PM 12/20 44.25n/123.47w
Wilkinson Ridge (1346 ft) 2.37 in 0357 PM 12/20 44.33n/123.72w
High Point (1935 ft) 1.97 in 0353 PM 12/20 43.91n/123.40w

... Lower Columbia and I - 5 corridor in Cowlitz County...
Castle Rock (212 ft) 1.42 in 0409 PM 12/20 46.27n/122.89w
2 WNW Longview (22 ft) 1.02 in 0440 PM 12/20 46.15n/122.98w
Kelso-longview Airport 0.98 in 0355 PM 12/20 46.12n/122.89w
1 SSW Woodland (35 ft) 0.95 in 0433 PM 12/20 45.90n/122.75w
Saint Helens (79 ft) 0.85 in 0439 PM 12/20 45.85n/122.82w

... Greater Vancouver area...
Larch Mountain (1149 ft) 1.76 in 0409 PM 12/20 45.72n/122.35w
1 ESE Heisson (534 ft) 1.12 in 0424 PM 12/20 45.81n/122.46w
Battle Ground (346 ft) 1.09 in 0438 PM 12/20 45.79n/122.54w
1 NE Lacamas Lake (387 ft) 1.08 in 0440 PM 12/20 45.62n/122.41w
1 se Orchards (254 ft) 1.04 in 0434 PM 12/20 45.65n/122.53w
Lacamas Lake (331 ft) 1.02 in 0426 PM 12/20 45.61n/122.43w
1 NNW Lacamas Lake (246 ft) 1.01 in 0436 PM 12/20 45.62n/122.44w

... Greater Portland Metro area...
scoggins crk blo Henry hagg 2.27 in 0400 PM 12/20 45.47n/123.20w
4 WSW Scappoose (1430 ft) 2.10 in 0345 PM 12/20 45.71n/122.96w
Tualatin r nr Gaston (170 ft 1.93 in 0415 PM 12/20 45.44n/123.17w
1 NW Forest Grove (200 ft) 1.92 in 0430 PM 12/20 45.54n/123.13w
2 WNW Forest Grove (262 ft) 1.64 in 0428 PM 12/20 45.53n/123.14w
Tualatin (241 ft) 1.52 in 0440 PM 12/20 45.37n/122.76w
Scappoose Industrial Airpark 1.45 in 0353 PM 12/20 45.77n/122.86w
4 WNW Farmington (482 ft) 1.41 in 0440 PM 12/20 45.47n/123.02w
Sherwood (176 ft) 1.36 in 0428 PM 12/20 45.35n/122.84w
Cornelius (170 ft) 1.29 in 0347 PM 12/20 45.51n/123.06w
1 NW West Linn (649 ft) 1.28 in 0438 PM 12/20 45.38n/122.66w
Tigard (220 ft) 1.26 in 0440 PM 12/20 45.41n/122.77w
King City (175 ft) 1.20 in 0433 PM 12/20 45.40n/122.80w

... Central Willamette Valley...
6 SW Pike (755 ft) 4.00 in 0430 PM 12/20 45.31n/123.35w
Falls City (419 ft) 3.80 in 0345 PM 12/20 44.88n/123.46w
Rockhouse 1 (1797 ft) 3.14 in 0412 PM 12/20 44.92n/123.47w
4 SSW Dallas (459 ft) 2.83 in 0437 PM 12/20 44.86n/123.34w
1 WSW Dallas (436 ft) 2.40 in 0441 PM 12/20 44.92n/123.33w
1 NW Rickreall (205 ft) 2.11 in 0346 PM 12/20 44.95n/123.25w
3 WSW Scholls (1348 ft) 2.02 in 0428 PM 12/20 45.36n/123.01w
1 ESE Dallas (282 ft) 1.86 in 0440 PM 12/20 44.92n/123.30w
1 W Newberg (177 ft) 1.72 in 0440 PM 12/20 45.30n/122.99w
2 ENE Yamhill (666 ft) 1.64 in 0432 PM 12/20 45.35n/123.14w
MC Minnville Municipal airpo 1.47 in 0353 PM 12/20 45.19n/123.13w
Salem ap (mcnary field) 1.47 in 0358 PM 12/20 44.91n/123.00w
1 S Salem (319 ft) 1.46 in 0435 PM 12/20 44.90n/123.03w
1 NW Dallas (413 ft) 1.34 in 0438 PM 12/20 44.93n/123.33w
Marion (308 ft) 1.32 in 0428 PM 12/20 44.75n/122.93w
1 WSW Salem (295 ft) 1.31 in 0439 PM 12/20 44.92n/123.06w
1 SSE Aumsville (377 ft) 1.30 in 0424 PM 12/20 44.83n/122.86w

... South Willamette Valley...
Corvallis (308 ft) 1.89 in 0345 PM 12/20 44.42n/123.33w
1 S North Albany (207 ft) 1.73 in 0437 PM 12/20 44.65n/123.12w
Monroe (401 ft) 1.61 in 0440 PM 12/20 44.32n/123.31w
2 S Philomath (308 ft) 1.60 in 0433 PM 12/20 44.50n/123.35w
2 NW Lacomb (534 ft) 1.29 in 0440 PM 12/20 44.61n/122.76w
Eugene-Mahlon Sweet Field 1.28 in 0354 PM 12/20 44.13n/123.22w
2 SW Corvallis (238 ft) 1.14 in 0431 PM 12/20 44.55n/123.29w
7 ESE crow (810 ft) 1.12 in 0438 PM 12/20 43.94n/123.22w
Santa Clara (380 ft) 1.11 in 0433 PM 12/20 44.11n/123.15w
Eugene (1200 ft) 1.02 in 0439 PM 12/20 44.05n/123.11w

... South Washington Cascade foothills...
Cougar (540 ft) 3.54 in 0434 PM 12/20 46.06n/122.29w
1 WSW Yale (462 ft) 3.27 in 0431 PM 12/20 46.00n/122.40w
Canyon Creek (2500 ft) 1.73 in 0352 PM 12/20 45.92n/122.30w

... South Washington Cascades...
Cougar 6 E (659 ft) 2.95 in 0220 PM 12/20 46.06n/122.20w
Dry Creek (2700 ft) 2.26 in 0425 PM 12/20 45.94n/121.99w
1 NW Northwoods (1100 ft) 1.62 in 0438 PM 12/20 46.07n/122.02w
Buck Creek (2690 ft) 1.37 in 0425 PM 12/20 46.06n/121.54w
Elk Rock (2500 ft) 1.36 in 0401 PM 12/20 46.31n/122.39w

... Northern Oregon Cascade foothills...
Yellowstone mtn (3080 ft) 3.16 in 0417 PM 12/20 44.59n/122.43w
Horse Creek (3402 ft) 2.08 in 0427 PM 12/20 44.95n/122.40w
pebble (3450 ft) 2.01 in 0353 PM 12/20 44.23n/122.99w
6 ENE Silver Falls (2315 ft) 1.80 in 0400 PM 12/20 44.95n/122.52w
2 NE Cherryville (1250 ft) 1.72 in 0431 PM 12/20 45.39n/122.11w
4 SSW Estacada (1079 ft) 1.00 in 0431 PM 12/20 45.23n/122.35w

... Northern Oregon Cascades...
log creek (2800 ft) 2.86 in 0406 PM 12/20 45.50n/121.90w
Jump Off Joe (3500 ft) 2.60 in 0300 PM 12/20 44.39n/122.17w
South Fork Bull Run (2630 ft 2.10 in 0300 PM 12/20 45.45n/122.03w
Boulder Creek (3570 ft) 2.05 in 0358 PM 12/20 44.72n/122.00w
Santiam Junction (3750 ft) 2.00 in 0300 PM 12/20 44.44n/121.95w
Wanderers Peak (4350 ft) 1.54 in 0407 PM 12/20 45.11n/122.20w
Red Box (3250 ft) 1.48 in 0407 PM 12/20 45.03n/121.92w
Three Lynx (1120 ft) 1.40 in 0415 PM 12/20 45.13n/122.07w

... Cascade foothills in Lane County...
Trout Creek (2319 ft) 1.87 in 0414 PM 12/20 44.11n/122.58w
Brush Creek (2130 ft) 1.48 in 0414 PM 12/20 44.28n/122.85w
2 W Walterville (595 ft) 1.13 in 0436 PM 12/20 44.07n/122.85w
2 W Walterville (574 ft) 1.03 in 0433 PM 12/20 44.07n/122.83w
2 WNW Disston (3064 ft) 0.96 in 0413 PM 12/20 43.73n/122.81w

... Cascades in Lane County...
Emigrant (3840 ft) 1.20 in 0353 PM 12/20 43.48n/122.23w
fields (3373 ft) 0.90 in 0417 PM 12/20 43.68n/122.30w

... Western Columbia River gorge...
locks (127 ft) 2.33 in 0408 PM 12/20 45.67n/121.88w
Prindle (239 ft) 1.40 in 0400 PM 12/20 45.59n/122.16w
2 SSE Rooster Rock state par 1.27 in 0431 PM 12/20 45.52n/122.22w
1 E Corbett (839 ft) 1.08 in 0438 PM 12/20 45.53n/122.27w

... Central Columbia River gorge...
Hood River (698 ft) 1.27 in 0437 PM 12/20 45.70n/121.54w
Hood River-Tucker bridge 1.20 in 0430 PM 12/20 45.65n/121.55w
3 WSW Hood River (698 ft) 1.03 in 0435 PM 12/20 45.69n/121.57w
1 WSW Hood River (465 ft) 0.93 in 0440 PM 12/20 45.70n/121.54w
1 ENE Underwood (406 ft) 0.93 in 0436 PM 12/20 45.73n/121.53w

... Upper Hood River Valley...
3 E Dee (1542 ft) 1.18 in 0434 PM 12/20 45.57n/121.55w
middle mtn (2544 ft) 1.15 in 0414 PM 12/20 45.58n/121.60w



Observations are collected from a variety of sources with varying
equipment and exposure. Not all data listed are considered official.



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Northeast Meadow Lane, Hillsboro, OR

Updated: 8:41 PM PST

Temperature: 54.9 °F Dew Point: 55 °F Humidity: 100% Wind: North at - Pressure: 29.65 in Hourly Precipitation: 0.00 in Graphs

Location: Intel Ronler Acres, Hillsboro, OR, Hillsboro, OR

Updated: 8:31 PM PST

Temperature: 56.5 °F Dew Point: 55 °F Humidity: 95% Wind: SSW at 12.0 mph Pressure: 29.64 in Hourly Precipitation: 0.01 in Graphs

Location: Jackson School, Hillsboro, OR

Updated: 8:39 PM PST

Temperature: 54.7 °F Dew Point: 53 °F Humidity: 95% Wind: Calm Pressure: 29.62 in Hourly Precipitation: 0.02 in Graphs

Location: Jackson School, Hillsboro, OR

Updated: 8:41 PM PST

Temperature: 55.2 °F Dew Point: 55 °F Humidity: 99% Wind: West at 1.7 mph Pressure: 29.47 in Hourly Precipitation: - Graphs

Location: Bentley Orchards, Hillsboro, OR

Updated: 8:41 PM PST

Temperature: 56.1 °F Dew Point: 55 °F Humidity: 95% Wind: NE at 1.0 mph Pressure: 29.68 in Hourly Precipitation: 0.01 in Graphs

Location: Connell Avenue, Hillsboro, OR

Updated: 8:42 PM PST

Temperature: 56.3 °F Dew Point: 52 °F Humidity: 85% Wind: SW at 2.2 mph Pressure: 29.64 in Hourly Precipitation: 0.01 in Graphs

Location: Lely Park, Hillsboro, OR

Updated: 8:39 PM PST

Temperature: 55.8 °F Dew Point: 54 °F Humidity: 93% Wind: Calm Pressure: 29.63 in Hourly Precipitation: 0.02 in Graphs

Location: Northwest Sheffield Avenue, Hillsboro, OR

Updated: 8:40 PM PST

Temperature: 54.9 °F Dew Point: 55 °F Humidity: 100% Wind: North at - Pressure: 29.61 in Hourly Precipitation: 0.00 in Graphs

Location: Near Century High School, Hillsboro, OR

Updated: 8:42 PM PST

Temperature: 55.9 °F Dew Point: 54 °F Humidity: 96% Wind: SW at 2.7 mph Pressure: 29.41 in Hourly Precipitation: 0.00 in Graphs

Location: Edwards Meadows, Hillsboro, OR

Updated: 8:31 PM PST

Temperature: 55.5 °F Dew Point: 54 °F Humidity: 94% Wind: SSW at 2.0 mph Pressure: 29.63 in Hourly Precipitation: 0.03 in Graphs

Location: Baseline / Cornelius Pass, Aloha, OR

Updated: 8:42 PM PST

Temperature: 56.9 °F Dew Point: 55 °F Humidity: 94% Wind: SSW at 5.0 mph Pressure: 29.67 in Hourly Precipitation: 0.02 in Graphs

Location: Rock Creek, Portland, OR

Updated: 8:40 PM PST

Temperature: 55.2 °F Dew Point: 55 °F Humidity: 98% Wind: SSW at 3.1 mph Pressure: 29.54 in Hourly Precipitation: 0.00 in Graphs

Location: Seminole Estates, Beaverton, OR

Updated: 8:42 PM PST

Temperature: 55.8 °F Dew Point: 53 °F Humidity: 91% Wind: SE at 1.8 mph Pressure: 29.81 in Hourly Precipitation: 0.01 in Graphs

Location: Rock Creek - Bethany Lake, Portland, OR

Updated: 8:42 PM PST

Temperature: 53.1 °F Dew Point: 51 °F Humidity: 94% Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Longacre Park, Beaverton, OR

Updated: 8:42 PM PST

Temperature: 56.1 °F Dew Point: 56 °F Humidity: 98% Wind: WSW at 2.0 mph Pressure: 29.68 in Hourly Precipitation: 0.00 in Graphs

Location: Whispering Woods Area, Beaverton, OR

Updated: 8:26 PM PST

Temperature: 55.8 °F Dew Point: 55 °F Humidity: 98% Wind: South at 8.9 mph Pressure: 29.50 in Hourly Precipitation: - Graphs

Location: Intel Aloha Campus, Aloha, OR, Beaverton, OR

Updated: 8:35 PM PST

Temperature: 56.1 °F Dew Point: 55 °F Humidity: 95% Wind: SE at 9.0 mph Pressure: 29.48 in Hourly Precipitation: 0.02 in Graphs

Location: Councel Creek, Cornelius, OR

Updated: 8:42 PM PST

Temperature: 56.6 °F Dew Point: 55 °F Humidity: 93% Wind: South at 1.0 mph Pressure: 29.63 in Hourly Precipitation: 0.00 in Graphs

Location: Somerset Meadows Park, Beaverton, OR

Updated: 8:42 PM PST

Temperature: 55.9 °F Dew Point: 55 °F Humidity: 96% Wind: Calm Pressure: 29.58 in Hourly Precipitation: 0.02 in Graphs

Location: 209th / Parker Court, Aloha, OR

Updated: 8:42 PM PST

Temperature: 54.4 °F Dew Point: -1 °F Humidity: - Wind: SSE at 2.7 mph Pressure: 29.61 in Hourly Precipitation: 0.00 in Graphs

Location: Cornelius, CORNELIUS, OR

Updated: 8:42 PM PST

Temperature: 55.8 °F Dew Point: 55 °F Humidity: 97% Wind: Calm Pressure: 29.64 in Hourly Precipitation: 0.02 in Graphs

Location: East of Cornelius Grade School, Cornelius, OR

Updated: 8:36 PM PST

Temperature: 56.3 °F Dew Point: 56 °F Humidity: 99% Wind: NNE at 9.9 mph Pressure: 29.46 in Hourly Precipitation: - Graphs

Location: Helvetia, Hillsboro, OR

Updated: 8:42 PM PST

Temperature: 56.8 °F Dew Point: 55 °F Humidity: 94% Wind: SSW at 6.0 mph Pressure: 29.64 in Hourly Precipitation: 0.01 in Graphs

Location: Beaver Acres, Huber, OR

Updated: 8:41 PM PST

Temperature: 57.0 °F Dew Point: 56 °F Humidity: 96% Wind: SSE at 2.0 mph Pressure: 29.63 in Hourly Precipitation: 0.00 in Graphs

Location: Helvetia Oregon, Hillsboro, OR

Updated: 8:42 PM PST

Temperature: 54.0 °F Dew Point: 53 °F Humidity: 95% Wind: Calm Pressure: 29.16 in Hourly Precipitation: 0.00 in Graphs

Location: Hwy 26 and Cornell, Beaverton, OR

Updated: 8:40 PM PST

Temperature: 56.2 °F Dew Point: 55 °F Humidity: 97% Wind: SW at 3.0 mph Pressure: 29.61 in Hourly Precipitation: 0.02 in Graphs

Location: Mason Hill, North Plains, OR

Updated: 8:38 PM PST

Temperature: 55.8 °F Dew Point: 55 °F Humidity: 97% Wind: NW at - Pressure: 29.87 in Hourly Precipitation: 0.00 in Graphs

Location: Bethany, Portland, OR

Updated: 8:37 PM PST

Temperature: 56.2 °F Dew Point: 56 °F Humidity: 98% Wind: South at 8.0 mph Pressure: 29.62 in Hourly Precipitation: 0.00 in Graphs

Location: Farm near Meriwether Golf Course, Hillsboro, OR

Updated: 8:41 PM PST

Temperature: 56.8 °F Dew Point: 55 °F Humidity: 93% Wind: South at 6.0 mph Pressure: 29.62 in Hourly Precipitation: 0.02 in Graphs

Location: at Harleman Park, Cornelius, OR

Updated: 8:38 PM PST

Temperature: 56.5 °F Dew Point: 53 °F Humidity: 88% Wind: Calm Pressure: 29.63 in Hourly Precipitation: 0.02 in Graphs

Location: 209th & Farmington Aloha, OR

Updated: 8:37 PM PST

Temperature: 56.4 °F Dew Point: 56 °F Humidity: 97% Wind: WSW at 1.0 mph Pressure: 29.62 in Hourly Precipitation: 0.03 in Graphs

Location: Copper Mountain, Aloha, OR

Updated: 8:42 PM PST

Temperature: 56.3 °F Dew Point: 56 °F Humidity: 99% Wind: Calm Pressure: 29.24 in Hourly Precipitation: 0.01 in Graphs

Location: Panorama Point (Washington Cty), Cornelius, OR

Updated: 8:42 PM PST

Temperature: 55.9 °F Dew Point: 55 °F Humidity: 97% Wind: ESE at 2.0 mph Pressure: 29.62 in Hourly Precipitation: 0.03 in Graphs

Location: Cedar Mill, Portland, OR

Updated: 8:41 PM PST

Temperature: 55.0 °F Dew Point: 54 °F Humidity: 96% Wind: North at - Pressure: 29.76 in Hourly Precipitation: - Graphs

Location: 160th and Westwind Dr., Beaverton, OR

Updated: 8:21 PM PST

Temperature: 55.8 °F Dew Point: 54 °F Humidity: 95% Wind: WSW at 1.1 mph Pressure: 29.45 in Hourly Precipitation: 0.04 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Portland or 
830 PM PST Sat Dec 20 2014 


Synopsis...mild and very wet weather is expected to continue over 
southwest Washington and northwest Oregon through Sunday as a strong 
westerly flow transports a plume of tropical moisture into the area. 
The heaviest rain will be over the mountains...and should ease some 
late Sunday in to Monday. There is the strong potential for river 
flooding from tonight into early next week. Longer range model 
output is suggesting a colder air mass will settle over the Pacific 
northwest late next week with snow down into at least the Cascade 
foothills and Coast Range. 
&& 


Short term...rainfall continued throughout the forecast area this 
evening in a strong and moist westerly flow. Radar and surface 
observations in recent hours suggest a subtle switch to focusing the 
heaviest rain over the Cascades...which seems to line up with model 
trends reasonably well. Additionally a compact shortwave seen in 
water vapor imagery should move across western Washington late this 
evening...which should diminish rainfall north of the Columbia later 
tonight. 


Despite lower flows on coastal rivers this morning...some minor 
tidal overflow was observed along the coast. The high tide during 
late morning on Sunday will be of about the same magnitude...and 
with much higher flows expected due to the abundant rainfall over 
the coastal river basins...confidence is fairly high that at least 
some minor tidal overflow impacts will be observed on Sunday with 
total tides pushing near 11 feet with coastal rivers approaching or 
exceeding bankfull. Low lying areas near Willapa Bay...Tillamook 
Bay...Depoe Bay...Waldport...and Florence...along with stretches 
of Highway 101 along the coast...may experience minor tidal 
overflow during the high tide around 11 am Sunday. Peak impacts 
are likely between about 9 am and 3 PM. With rivers continuing to 
run at or near flood stage...the midday high tide on Monday may 
again cause some minor issues. 


Remainder of short term discussion unchanged...as we get into later 
Sunday...the cold front that is currently sitting well to our north 
off the British Columbia and northern Washington coast will slowly 
begin to work it/S way southward into our County Warning Area. Behind the cold 
front...the strong orographic flow will weaken and precipitation 
taper off considerably. The current forecast model timing has the precipitation 
over S Washington tapering off Sun afternoon...and the north Oregon 
Cascades and Coast Range dropping off sun evening. The heavier 
precipitation becomes increasingly confined to the central or 
Cascades and Coast Range tomorrow. Eventually the cold fronts all 
the way through the forecast area Sun night into early Monday morning. Snow 
levels will fall behind the cold front...which may allow for a few 
inches of snowfall accumulation down to near the Cascade passes late 
Sunday or early Monday before the precipitation completely ends. 


Conditions look drier for Monday as upper level ridging builds over the 
Pacific northwest. The 12z European model (ecmwf) is indicating that the baroclinic zone to our 
south may try to lift northward again as a warm front on Monday...so did 
not completely remove probability of precipitation. But the NAM and GFS are completely 
dry...so stayed with low chance probability of precipitation for now. 


Mainly dry conditions will likely continue on for much of Tuesday. 
However...forecast confidence is a little better that we will see some 
light rain on Tuesday night or Wednesday as a weak frontal system to the north 
moves through the weakening upper level ridge. Pyle 


&& 


Long term...no changes. Previous discussion follows. Tuesday night 
through Saturday...models remain consistent in flattening an upper 
level ridge late Tuesday into Wednesday. There are some model 
discrepancies concerning how far south the next shortwave will move 
into the Pacific northwest...but overall an upper level trough will 
sag south and move inland early Wednesday. This will usher in 
another batch of cool and rainy conditions...with snow levels 
dropping to near 2000 feet so expect snow showers over Cascade passes 
right in time for Holiday travel. Again...Holiday travelers headed 
over the Cascade passes will certainly need to monitor the forecast. 
Lingering moisture continues into Christmas day...but will likely be 
occasional showers with partly cloudy skies for the most part. 
Colder northerly flow persists into early next weekend...with drier 
conditions expected for Friday. A new development in the 12z model 
runs has been another shortwave disturbance dropping south over the 
forecast area late Friday...bringing a threat for rain and snow on 
the mountains. 
/27 
&& 


Hydrology...numerous flood warnings already in effect...including 
major floods for the marys and Clackamas rivers. Flooding along the 
mainstem Willamette looks unlikely at this point. 
&& 


Aviation...flight conditions are beginning to improve is spots 
inland as the air mass become more mixed. Radar shows rain 
continues to stream into the area with a some rain shadowing over 
the valley. There should be a VFR with MVFR mixed in inland 
through Sun morning with perhaps less MVFR Sun afternoon. Coastal 
areas should be primarly LIFR to IFR through Sun morning with 
improvement to MVFR. Expect mountains to remain obscured through 
sun. 


Kpdx and approaches...likely to see a mix of MVFR and low VFR 
through Sun morning with a better chance for primarly VFR in the 
afternoon. /27 


&& 


Marine...winds remain gusty but primarly in the small craft 
adviosory category so have ended the gales. The strongest winds 
with be along the northern border tonight so there may be a few 
gusts to 35 knots. Winds continue to ease through day sun...with 
winds generally 15 knots or less and becoming more west and then northwest. 
Winds may increase again around midweek into Small Craft Advisory 
range as a frontal system approaches. 


Seas are slowly subsiding but will remain around 17 feet tonight 
then around 15 feet Sun afternoon. At this level high surf 
conditions have ended. However...seas likely remain in the low to 
middle teens through at least the first half of the week and possibly 
until Friday. /26 


&& 


Pqr watches/warnings/advisories... 
or...Flood Watch through Monday afternoon for Cascade foothills in 
Lane County-Cascades in Lane County-central Coast Range of 
western Oregon-central Columbia River gorge-central Oregon 
coast-central Willamette Valley-Coast Range of northwest 
Oregon-greater Portland metropolitan area-lower Columbia-north 
Oregon coast-northern Oregon Cascade foothills-northern 
Oregon Cascades-south Willamette Valley-Upper Hood River 
Valley-western Columbia River gorge. 


Coastal Flood Advisory from 9 am to 3 PM PST Sunday 
for central Oregon coast-north Oregon coast. 


Washington...Flood Watch through Monday afternoon for central Columbia River 
gorge-Greater Vancouver area-I-5 corridor in Cowlitz County- 
South Washington Cascade foothills-South Washington 
Cascades-South Washington coast-western Columbia River 
gorge-Willapa Hills. 


Coastal Flood Advisory from 9 am to 3 PM PST Sunday for South 
Washington coast. 


Pz...Small Craft Advisory for winds until 1 PM PST Sunday for 
coastal waters from Cape Shoalwater Washington to 
Florence or out 60 nm. 


Small Craft Advisory for hazardous seas until 4 PM PST 
Monday for coastal waters from Cape Shoalwater Washington to 
Florence or out 60 nm. 


Small Craft Advisory for rough Columbia River bar 
until 10 PM PST Sunday. 


&& 
$$ 


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This discussion is for northwest Oregon and southwest Washington 
from the Cascade crest to 60 nautical miles offshore. The area is 
commonly referred to as the forecast area. 






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