Portland, Oregon Weather Conditions

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Current Conditions

  • 42°
  • Mostly Cloudy
  • Wind: ESE 9 mph
  • Humidity: 89%
  • Visibility: 10.0 miles
  • Dew Point: 39°
  • Pressure: 29.98 in. 0
  • Heat Index: 37

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Fog
Fog
Fog
Fog
Overcast
Overcast
Mostly Cloudy
Mostly Cloudy
Chance of Rain
Chance of Rain
39°
43°
45°
45°
45°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Chance of Rain
  • High: 50 °
  • Low: 46 °
  • Chance of Rain
  • Friday
  • Rain
  • High: 50 °
  • Low: 43 °
  • Rain
  • Saturday
  • Rain
  • High: 55 °
  • Low: 50 °
  • Rain
  • Sunday
  • Chance of Rain
  • High: 55 °
  • Low: 48 °
  • Chance of Rain
  • Monday
  • Chance of Rain
  • High: 52 °
  • Low: 45 °
  • Chance of Rain

Forecast for Portland, Oregon

Updated: 1:00 AM PST on December 18, 2014

  • Thursday

    Overcast in the morning, then mostly cloudy with a chance of rain. Fog early. High of 50F. Winds from the ESE at 5 to 15 mph. Chance of rain 80%.

  • Thursday Night

    Overcast with rain. Low of 46F. Winds from the SE at 10 to 15 mph. Chance of rain 100% with rainfall amounts near 0.2 in. possible.

  • Friday

    Overcast with rain, then a chance of rain in the afternoon. High of 50F. Winds from the South at 5 to 10 mph. Chance of rain 100%.

  • Friday Night

    Overcast with rain. Low of 43F. Winds from the SSE at 5 to 10 mph. Chance of rain 90% with rainfall amounts near 0.2 in. possible.

  • Saturday

    Overcast with rain. High of 55F. Winds from the SE at 5 to 15 mph. Chance of rain 100% with rainfall amounts near 0.4 in. possible.

  • Saturday Night

    Overcast with rain, then a chance of rain after midnight. Fog overnight. Low of 50F. Winds from the South at 5 to 10 mph. Chance of rain 80% with rainfall amounts near 1.3 in. possible.

  • Sunday

    Overcast with a chance of rain. Fog early. High of 55F. Winds from the SW at 5 to 15 mph. Chance of rain 80% with rainfall amounts near 0.6 in. possible.

  • Sunday Night

    Overcast with a chance of rain. Low of 48F. Winds less than 5 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Monday

    Overcast with a chance of rain in the morning, then mostly cloudy. High of 52F. Winds less than 5 mph. Chance of rain 20%.

  • Monday Night

    Mostly cloudy with a chance of rain. Low of 45F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday

    Mostly cloudy with a chance of rain. High of 50F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday Night

    Mostly cloudy. Low of 37F. Winds less than 5 mph.

  • Wednesday

    Overcast. High of 45F. Winds less than 5 mph.

  • Wednesday Night

    Partly cloudy. Low of 30F. Winds less than 5 mph.

  • Thursday

    Partly cloudy. High of 46F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 27F. Winds less than 5 mph.

  • Friday

    Clear. High of 45F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 25F. Winds less than 5 mph.

  • Saturday

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

  • Saturday Night

    Partly cloudy with a chance of snow. Low of 28F. Winds from the East at 5 to 10 mph. Chance of snow 30% with accumulations up to 1 in. possible.

  • Sunday

    Partly cloudy with a chance of snow. High of 43F. Winds from the East at 5 to 10 mph. Chance of snow 50% with accumulations up to 1 in. possible.

  • Sunday Night

    Clear. Fog overnight. Low of 28F with a windchill as low as 21F. Winds from the East at 5 to 10 mph.

Severe Weather Alert Descriptions

 Special Statement  Statement as of 2:35 PM PST on December 17, 2014


... Potential for flooding Saturday night through Monday for
northwest Oregon and southwest Washington rivers...

A storm system developing over the Pacific is expected to bring
heavy rain to the Pacific northwest Saturday evening through
Sunday. As of now... it looks like the heaviest rain will be in
the north Oregon Coast Range and the north Oregon and South
Washington Cascades... but this forecast is uncertain.
Meteorologists will be keeping a close eye on the development of
this storm. This is a classic atmospheric river event that could
produce some areas of very heavy rain.

Rainfall amounts are currently projected as 5 to 8 inches for the
coast... Coast Range and Cascades... with 2 to 5 inches for valley
locations. Snow levels will be high... well above pass level... for
most of this event. If we get these amounts of rain or more...
there will likely be flooding on area rivers and creeks Saturday
night through Monday.

Stay up to date with the latest NWS forecasts at
weather.Gov/Portland or Mobile.Weather.Gov.



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Southwest Portland, Portland, OR

Updated: 4:21 AM PST

Temperature: 45.9 °F Dew Point: 43 °F Humidity: 90% Wind: North at - Pressure: 30.02 in Hourly Precipitation: - Windchill: 46 °F Graphs

Location: Portland - West Hills, Portland, OR

Updated: 4:25 AM PST

Temperature: 41.9 °F Dew Point: 38 °F Humidity: 87% Wind: SSW at 1.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Lair Hill, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.2 °F Dew Point: 41 °F Humidity: 93% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Bridlemile, Portland, OR

Updated: 4:11 AM PST

Temperature: 44.2 °F Dew Point: 42 °F Humidity: 92% Wind: NE at 5.3 mph Pressure: 29.79 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Multnomah Village North, Portland, OR

Updated: 4:23 AM PST

Temperature: 43.7 °F Dew Point: 43 °F Humidity: 96% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: N of Bridlemile School, Portland, OR

Updated: 4:15 AM PST

Temperature: 43.6 °F Dew Point: 43 °F Humidity: 97% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Westerly, NW Portland, Portland, OR

Updated: 4:22 AM PST

Temperature: 43.5 °F Dew Point: 41 °F Humidity: 90% Wind: Calm Pressure: 29.94 in Hourly Precipitation: - Windchill: 44 °F Graphs

Location: Hillside, Portland, OR

Updated: 4:22 AM PST

Temperature: 44.1 °F Dew Point: 41 °F Humidity: 88% Wind: North at - Pressure: 29.70 in Hourly Precipitation: - Windchill: 44 °F Graphs

Location: South Burlingame, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.2 °F Dew Point: 40 °F Humidity: 89% Wind: Calm Pressure: 29.58 in Hourly Precipitation: 0.81 in Windchill: 43 °F Graphs

Location: Creston - Kenilworth, Portland, OR

Updated: 4:22 AM PST

Temperature: 46.4 °F Dew Point: 42 °F Humidity: 86% Wind: North at - Pressure: 30.17 in Hourly Precipitation: - Windchill: 46 °F Graphs

Location: Richmond / Stripling Weather Network, Portland, OR

Updated: 4:11 AM PST

Temperature: 41.7 °F Dew Point: 41 °F Humidity: 97% Wind: Calm Pressure: 29.92 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Portland Rowing Club, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.0 °F Dew Point: 42 °F Humidity: 95% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Southwest Portland, Portland, OR

Updated: 4:21 AM PST

Temperature: 42.8 °F Dew Point: 42 °F Humidity: 98% Wind: North at - Pressure: 30.06 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Waverleigh Heights, Portland, OR

Updated: 4:17 AM PST

Temperature: 43.2 °F Dew Point: 41 °F Humidity: 93% Wind: Calm Pressure: 29.96 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Sullivan's Gulch, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.7 °F Dew Point: 40 °F Humidity: 87% Wind: Calm Pressure: 29.71 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Richmond, Portland, OR

Updated: 4:17 AM PST

Temperature: 43.2 °F Dew Point: 41 °F Humidity: 93% Wind: North at - Pressure: 30.03 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Irvington, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.5 °F Dew Point: 41 °F Humidity: 91% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Laurelhurst, Portland, OR

Updated: 4:24 AM PST

Temperature: 41.9 °F Dew Point: 36 °F Humidity: 80% Wind: SSE at 2.7 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Smith School, Portland, OR

Updated: 4:14 AM PST

Temperature: 43.3 °F Dew Point: 42 °F Humidity: 97% Wind: South at 1.6 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Creston Park, Portland, OR

Updated: 4:25 AM PST

Temperature: 43.1 °F Dew Point: 41 °F Humidity: 91% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: West Hills, Portland, OR

Updated: 4:25 AM PST

Temperature: 44.5 °F Dew Point: 43 °F Humidity: 94% Wind: NE at 2.6 mph Pressure: 29.24 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Raleigh Park, Portland, OR

Updated: 4:24 AM PST

Temperature: 42.3 °F Dew Point: 41 °F Humidity: 95% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Forest Park, Portland, OR

Updated: 4:21 AM PST

Temperature: 42.3 °F Dew Point: 41 °F Humidity: 95% Wind: Calm Pressure: 29.11 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: SW Portland - Tryon Creek, Portland, OR

Updated: 4:24 AM PST

Temperature: 42.4 °F Dew Point: 42 °F Humidity: 99% Wind: Calm Pressure: 29.97 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: West Slope, Portland, OR

Updated: 4:22 AM PST

Temperature: 43.6 °F Dew Point: 43 °F Humidity: 97% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Cedar Mill, Portland, OR

Updated: 4:21 AM PST

Temperature: 43.9 °F Dew Point: 41 °F Humidity: 91% Wind: North at - Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Torreyview, Portland, OR

Updated: 4:25 AM PST

Temperature: 44.4 °F Dew Point: 40 °F Humidity: 83% Wind: Calm Pressure: 30.38 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Woodstock, Portland, OR

Updated: 4:25 AM PST

Temperature: 42.6 °F Dew Point: 41 °F Humidity: 92% Wind: Calm Pressure: 29.88 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: West Portland Park, Portland, OR

Updated: 4:23 AM PST

Temperature: 42.3 °F Dew Point: 40 °F Humidity: 93% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Ardenwald Station #1, Portland, OR

Updated: 4:22 AM PST

Temperature: 41.5 °F Dew Point: 40 °F Humidity: 95% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Garden Home, Portland, OR

Updated: 4:25 AM PST

Temperature: 42.3 °F Dew Point: 41 °F Humidity: 95% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Mt Tabor, Portland, OR

Updated: 4:25 AM PST

Temperature: 42.4 °F Dew Point: 39 °F Humidity: 89% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Raleigh Hills, Beaverton, OR

Updated: 4:25 AM PST

Temperature: 44.2 °F Dew Point: 43 °F Humidity: 96% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Humboldt, Portland, OR

Updated: 4:25 AM PST

Temperature: 41.7 °F Dew Point: 42 °F Humidity: 99% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Portland, OR

Updated: 4:25 AM PST

Temperature: 47.3 °F Dew Point: 46 °F Humidity: 94% Wind: ENE at 3.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Southwest Portland, Portland, OR

Updated: 4:20 AM PST

Temperature: 44.1 °F Dew Point: 43 °F Humidity: 95% Wind: North at - Pressure: 30.02 in Hourly Precipitation: - Windchill: 44 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Portland or 
414 am PST Thursday Dec 18 2014 


Synopsis...rain will redevelop by late this afternoon and increase 
Thursday night as a more organized frontal system moves onshore. A 
colder upper trough moves across the area Friday...which will lower 
snow levles below the Cascade passes. Mild and very wet weather is 
expected this weekend. There is potential for an atmospheric river 
and associated heavy rain to develop over the area. The exact 
location of the jet stream and associated moisture plume are still in 
doubt. There is the potential for some flooding late this 
weekend into early next week. 


&& 


Short term...Thursday through Saturday...water vapor imagery as of 
1030z shows a deep upper low in the Gulf of Alaska with a frontal 
system taking shape near 135w. The 06z nam12 run shows a weak surface 
low off the S Oregon coast at 09z. This feature is very difficult to 
pick out in the water vapor looper. The NAM shows this low filling 
overnight as it drifts to the NE. National Weather Service Portland dual-pol Doppler radar 
showing decreasing radar returns...with the strongest echoes in the 
Willapa Hills and S Washington Cascades. 


NAM...GFS and European model (ecmwf) all indicate a weak 500 mb ridge to move across 
the area today. However...model cross-sections and time-height 
forecasts maintain moist low-levels through the day. Thus...still 
expect light quantitative precipitation forecast across the forecast area today...ahead of the next 
frontal system. Models appear to be in reasonable agreement with this 
front...with landfall sometime around 00z Friday or shortly thereafter. 
One concern was the potential for high wind along the coastal 
headlands. Previous shift had issued a high wind watch for late this 
afternoon through 08z Friday. Upon further review...not seeing enough in 
the 850 mb to 950 mb wind fields to upgrade to a warning. The 00z 
WRF-GFS valid 00z Friday has a coastal jet signature over the Oregon 
coastal waters...with forecast 10m wind gusts of 55 knots. However...by 
03z Friday the model has just a small sliver of 55 knots gusts just off the 
central coast. Would not be surprised to see isolated 55 to 60 miles per hour 
gusts on exposed Headland areas late this afternoon through the 
middle-evening hours...but do not think these will be widespread and 
frequent enough to warrant a warning. 


The system will bring a 6-9 hour shot of rain to the area...but snow 
levels are expected to slowly rise ahead of the front. The colder 
upper trough slides across the region Friday...with 1000-500 mb 
thickness values dropping into the low to middle 530s by 18z Friday. This 
puts snow levels well below the Cascade passes...but by this time the 
bulk of the precipitation has already occurred. Although not in the 
forecast grids as of yet...need to consider the possibility of 
thunderstorms for Friday. GFS sounding for kast valid 22z Friday shows Li 
values near 0 but a sweat index of 272. The 1000-750 mb lapse rates 
are around 7.5c/km. 


Models still advertising a change to a much wetter pattern starting 
Sat. NAM and GFS continue to show an atmospheric river set up 
directed at SW Washington and northwest Oregon Sat. The Gem may be a bit 
slower...but still has substantial quantitative precipitation forecast directed at the forecast area 
by Sat night. The 00z wrfgfs shows very heavy quantitative precipitation forecast with up to 8-12 
inches of rain in the higher terrain and 2-4 inches in the Willamette 
Valley Sat through Monday. Will need to monitor this very closely 
over the next few days as similar situations have produced flooding 
on area mainstem rivers. Weishaar 


Hydrology...while river forecasts of current model precipitation 
indicate flooding is possible on a river or two in the forecast area 
Sunday into Monday...a look at the most correlated analogs to the 96 
hour GFS model forecast shed light on flooding chances across our 
forecast area late in the weekend and early next week. The three 
most correlated analog weather patterns to the current 96 hour GFS 
model forecast are late January 2003...early January 1983 and late 
November 1999. All three of these events produced isolated to 
scattered river flooding within northwest Oregon and/or southwest 
Washington. While there are certainly notable differences between 
the current pattern and each of these historical analogs...some 
critical weather parameters appear even more favorable for producing 
heavier rains than these past events. This certainly helps build 
confidence there will be hydrological impacts within our forecast 
area of responsibility so long as the pattern holds. 
Nonetheless...there is still considerable uncertainty in where the 
heaviest rain will set up...and exactly which rivers will flood and 
when. Please continue to monitor the forecast if you live near any 
rivers fed by the the Cascades or Coast Range...and please see 
water.Weather.Gov/ahps2/index.Php?Wfo=pqr for the latest river 
forecasts. /Neuman 


Long term...Saturday night through Wednesday...models maintain the 
mild and moist atmospheric river pattern through at least sun. The 
European model (ecmwf) and Gem gradually shift the focus of the heaviest precipitation to the 
north Sun afternoon but the GFS does not. Expect plenty of rainfall to 
continue through Sunday. On Monday and Tuesday...some weak ridging 
moves over the region but showers likely continue in the moist 
onshore flow. The European model (ecmwf) then indicates another major pattern change 
around the middle of next week with a much colder air mass settling 
over the Pacific northwest. However...moisture diminishes due to the drier north-NE 
flow. Thus...after whatever snow the Cascades get late this week...it 
will be lost over the weekend. The GFS also has a change to colder 
northwest-north flow aloft but it maintains an open trough instead of the closed 
upper low European model (ecmwf) solution. While still some significant uncertainty 
exists with respect to the timing of the cold air and just how cold 
the air will be...it does appear that a change to much cooler 
conditions will move into the region. Snow levels should be quite low 
over the Holiday...but dropped probability of precipitation substantially next Thursday and Thursday 
night. Weishaar 


&& 


Aviation...light winds and a moist lower atmosphere will continue 
to bring a mix of IFR to VFR conditions through late Thursday 
morning. As the next front approaches and the winds pick up ahead 
of it expect most taf sites to improve to VFR by Thursday 
afternoon. The front will likely push into the coast around 03z 
Friday...and into the interior around 06z Friday. Expect brief 
periods of IFR to MVFR ceilings and visible under light to moderate rain 
bands associated with the front. 


Kpdx and approaches...VFR conditions expected to persist through 
Friday morning. However...brief periods of MVFR ceilings are possible 
through late Thursday morning due to a moist lower atmosphere. A 
front will push through after 06z Friday and could bring brief 
periods to IFR to MVFR ceilings and visible under light to moderate rain 
bands. /64 


&& 


Marine...seas continued to hover around 10 feet overnight and looks 
to remain elevated throughout the morning so the Small Craft 
Advisory for hazardous seas was extended to 1 PM. A strong 
frontal system is still on track to move across the waters today 
and will bring solid gale gusts through Thursday night with seas 
climbing into the middle teens. /64 


Previous discussion follows...expect seas to subside fairly 
quickly back down into the 10 to 12 feet range late Thursday night 
into early Friday morning. However...these lower wave heights will 
be short lived as an impressive long period westerly swell will 
likely arrive Friday afternoon into Friday evening. Wave heights 
may nearly double in a 6 hour period so this could certainly catch 
off guard any uninformed mariners that venture out Friday morning. 
Confidence is relatively high that this swell will likely exceed 
20 feet. In fact...these patterns often produce higher seas than 
forecasted by the enp wave model. A high surf advisory appears 
likely. The good news is that the largest swell will likely arrive 
during low tide and during the night time hours when most mariners 
and beach goers are not in harms way. 


This swell train will subside Saturday...but another strong 
frontal storm system will likely produce gale force to possibly 
low end storm force gusts across the waters on Saturday. This will 
effectively keep seas flirting with the 20 feet mark on Saturday. 


Normal high tide at Toke Point Washington is supposed to be 10.3 
feet Saturday around 11 am. With southerly winds supporting a 
positive tidal anomaly of around 0.5 feet...high tide will approach 
11 feet and may result in some minor tidal overflow flooding in 
Willapa Bay. Given the heavier rains will not have arrived...the 
Willapa river is forecasted to be around 20 percent of flood 
flow on Saturday...which should help mitigate more widespread 
coastal flooding concerns. 


High pressure will slowly build over the northeast Pacific late in 
the weekend and into early next week...which should result in 
winds and seas relaxing quite a bit when compared to the 
Friday/Saturday time frame. /Neuman 


&& 


Pqr watches/warnings/advisories... 
or...none. 


Washington...none. 


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


Gale Warning from 1 PM this afternoon to midnight PST tonight 
for coastal waters from Cape Shoalwater Washington to Florence or out 
60 nm. 


Small Craft Advisory for hazardous seas until 1 PM PST this 
afternoon for coastal waters from Cape Shoalwater Washington to 
Florence or out 60 nm. 


Small Craft Advisory for rough Columbia River bar until 6 am 
PST Friday. 


&& 


$$ 


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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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