La Grande, Oregon

National Weather Service: Winter Storm Warning

Current Conditions

 
Temp: 36°
Dew Point: 19°
Humidity: 52%
Wind: SSW 7 mph
Visibility: 10.0 miles
Pressure: 30.00 in. +
Sky: Partly Cloudy
Wind Chill: 30°

 

Customize Your Weather

Get weather by ZIP code, city, state, airport code or country:

Weather by E-mail: Get forecasts and storm alerts delivered to you.

Sign Up...

Almanac

Average High: 42°

Average Low: 23°

Record high/year: 60° (2006)

Record low/year: -3° (1985)

Sunrise: 6:59 AM

Sunset: 4:17 PM

Detailed History

Sun and Moon

Sunrise: 06:59 AM (PST)

Moon Rise: 11:11 AM (PST) 11 21

Sunset: 04:17 PM (PST)

Moon Set: 08:35 PM (PST) 11 21

Moon Phase

Today
Nov. 24
Dec. 02
Dec. 08
Dec. 16

 

Local Radar

Local Satellite



Next 12 Hours

 
5  pm
8  pm
11  pm
2  am
5  am
Chance of Snow Chance of Snow
Chance of Snow Chance of Snow
Snow Snow
Snow Snow
Snow Snow
40°
32°
34°
36°
36°

 

Forecast data from the National Digital Forecast Database


5-Day Forecast

Saturday Chance of Snow Hi 40° Lo 32° Chance of Snow
Sunday Snow Hi 40° Lo 22° Snow
Monday Mostly Cloudy Hi 40° Lo 32° Mostly Cloudy
Tuesday Mostly Cloudy Hi 45° Lo 29° Mostly Cloudy
Wednesday Partly Cloudy Hi 45° Lo 31° Partly Cloudy

 

Forecast for Northern Blue Mountains of Oregon

Updated: 4:08 PM PST on November 21, 2009
Winter Storm Warning in effect from 10 PM this evening to 7 PM PST Sunday...

Tonight

Widespread rain or snow overnight. Areas of blowing snow overnight. Very windy. Snow accumulation of 2 to 5 inches. Snow level 5000 feet. Lows 29 to 34. South wind 10 to 20 mph with gusts to around 35 mph increasing to 30 to 40 mph with gusts to around 50 mph overnight. Chance of precipitation near 100 percent.

 

Sunday

Areas of blowing snow in the morning. Snow...windy. Snow accumulation of 5 to 7 inches above 4500 feet with 2 to 4 inches 4500 feet and below. Highs 32 to 38. Storm total accumulation of 4 to 12 inches. West wind 20 to 30 mph with gusts to around 45 mph. Chance of precipitation near 100 percent.

 

Sunday Night

Mostly cloudy with a 30 percent chance of snow showers. Breezy...colder. Lows 19 to 24. West wind 15 to 25 mph becoming southwest 5 to 15 mph overnight.

 

Monday

Partly cloudy in the morning then becoming mostly cloudy. Highs 33 to 39. South wind 10 to 20 mph.

 

Monday Night

Mostly cloudy with a 20 percent chance of snow and rain. Snow level 4000 feet. Lows 25 to 30. South wind 10 to 20 mph.

 

Tuesday

Partly cloudy. A slight chance of rain. Highs 38 to 45.

 

Tuesday Night and Wednesday

Partly cloudy. Lows 23 to 28. Highs 40 to 46.

 

Wednesday Night

Partly cloudy. Breezy. Lows 23 to 28.

 

Thanksgiving Day

Rain likely. Highs 41 to 47.

 

Thursday Night

Mostly cloudy. A chance of rain showers. Lows 27 to 32.

 

Friday

Partly cloudy. A chance of rain or snow showers. Highs 39 to 44.

 

Friday Night

Partly cloudy. A chance of snow. Lows 25 to 30.

 

Saturday

Mostly cloudy. A slight chance of rain or snow showers. Highs 34 to 39.

 

 

 Winter Storm Warning  Statement as of 3:29 PM PST on November 21, 2009


... Winter Storm Warning in effect from 10 PM this evening to 7 PM
PST Sunday...

The National Weather Service in Pendleton has issued a Winter
Storm Warning for heavy snow and blowing snow... which is in effect
from 10 PM this evening to 7 PM PST Sunday. The Winter Storm
Watch is no longer in effect.

Total snow fall over the northern Blue Mountains of Oregon and
the northwest Blue Mountains in Washington is expected to reach 7
to 12 inches. Most of this snow will accumulate from Sunday
morning and continue through Sunday afternoon. Additionally...
sustained winds of 15 to 25 mph with gusts up to 35 mph at pass
levels will result in areas of blowing snow with local visibility
reductions down to one-quarter mile of less at times.

Precautionary/preparedness actions...

A Winter Storm Warning for heavy snow means significant snow
accumulations are expected. Snowfall intensities will be heavy
enough to substantially reduce visibilities at times. Blowing
snow means blowing snow will reduce visibilities at times and
drifting snow will cause a travel hazard. For additional weather
information... check our web site at www.Weather.Gov/Pendleton.








Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: MesoWest LaGrande Central Elementary OR US PDTWFO, La Grande, OR

Updated: 4:05 PM PST

Temperature: 38 °F Dew Point: 24 °F Humidity: 58% Wind: SSW at 2 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: 38 °F Historical Graphs

Location: MesoWest Ladd Canyon at Charles Reynolds OR US ODOT, La Grande, OR

Updated: 4:01 PM PST

Temperature: 38 °F Dew Point: 19 °F Humidity: 47% Wind: NE at 2 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 38 °F Historical Graphs

Location: MesoWest Ladd Creek (I-84 MP 270.9) OR US ODOT, La Grande, OR

Updated: 4:08 PM PST

Temperature: 36 °F Dew Point: 21 °F Humidity: 54% Wind: SW at 4 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 33 °F Historical Graphs

Location: MesoWest BEAVER RESERVOIR OR US SNOTEL, La Grande, OR

Updated: 3:00 PM PST

Temperature: 29 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 29 °F Historical Graphs

Location: MesoWest BOWMAN SPRINGS OR US SNOTEL, Meacham, OR

Updated: 3:00 PM PST

Temperature: 32 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 32 °F Historical Graphs

Location: MesoWest Union Jct OR US UPR, Union, OR

Updated: 4:00 PM PST

Temperature: 47 °F Dew Point: - Humidity: - Wind: South at 1 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 47 °F Historical Graphs

Location: MesoWest Ladd Canyon at the Summit (I-84 OR US ODOT, Union, OR

Updated: 4:02 PM PST

Temperature: 36 °F Dew Point: 15 °F Humidity: 42% Wind: SE at 8 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Historical Graphs

Location: RAWS BLACK MTN RIDGE OR US, Meacham, OR

Updated: 4:17 PM PST

Temperature: 25 °F Dew Point: 21 °F Humidity: 86% Wind: South at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 18 °F Historical Graphs

Location: RAWS LAGRANDE 1 OR US, Summerville, OR

Updated: 4:14 PM PST

Temperature: 36 °F Dew Point: 24 °F Humidity: 61% Wind: WSW at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 31 °F Historical Graphs

Location: MesoWest Union OR US UPR, Union, OR

Updated: 3:00 PM PST

Temperature: 41 °F Dew Point: - Humidity: - Wind: West at 1 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 41 °F Historical Graphs

Location: RAWS J RIDGE OR US, La Grande, OR

Updated: 3:28 PM PST

Temperature: 29 °F Dew Point: 21 °F Humidity: 71% Wind: Calm Pressure: - Hourly Precipitation: 0.01 in Windchill: 29 °F Historical Graphs

Location: MesoWest WOLF CREEK OR US SNOTEL, North Powder, OR

Updated: 3:00 PM PST

Temperature: 28 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 28 °F Historical Graphs

Location: MesoWest WOLF CREEK OR US SNOTEL, North Powder, OR

Updated: 3:00 PM PST

Temperature: 28 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 28 °F Historical Graphs

Location: City Hall, Cove, OR

Updated: 4:35 PM PST

Temperature: 35.6 °F Dew Point: 24 °F Humidity: 62% Wind: South at 1.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 36 °F Historical Graphs

Location: APRSWXNET Cove OR US, Cove, OR

Updated: 4:22 PM PST

Temperature: 37 °F Dew Point: 24 °F Humidity: 58% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 37 °F Historical Graphs

Location: MesoWest EMIGRANT SPRINGS OR US SNOTEL, Meacham, OR

Updated: 3:00 PM PST

Temperature: 33 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 33 °F Historical Graphs

Location: MesoWest COUNTY LINE OR US SNOTEL, Ukiah, OR

Updated: 3:00 PM PST

Temperature: 30 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Historical Graphs

Location: APRSWXNET Elgin OR US, Elgin, OR

Updated: 4:24 PM PST

Temperature: 37 °F Dew Point: 23 °F Humidity: 57% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: 37 °F Historical Graphs

Location: MesoWest Bonifer OR US UPR, Meacham, OR

Updated: 3:10 PM PST

Temperature: 41 °F Dew Point: - Humidity: - Wind: ESE at 1 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 41 °F Historical Graphs

Location: 3N Elgin, Elgin, OR

Updated: 4:33 PM PST

Temperature: 35.8 °F Dew Point: 20 °F Humidity: 52% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Windchill: 36 °F Historical Graphs

Location: HADS PILOT ROCK 11E RAIN OR US USBR, Meacham, OR

Updated: 3:45 PM PST

Temperature: 42 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 42 °F Historical Graphs

Location: RAWS POINT PROM II OR US, Cove, OR

Updated: 4:04 PM PST

Temperature: 19 °F Dew Point: 16 °F Humidity: 86% Wind: SSW at 5 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 12 °F Historical Graphs

MSN Maps of:

Temperature Dew Point Humidity Wind Pressure Hourly Precipitation -

NWS Forecaster Discussion




060 
fxus66 kpdt 212332 aaa 
afdpdt 


Area forecast discussion...updated 
National Weather Service Pendleton or 
332 PM PST Sat Nov 21 2009 


Updated aviation discussion 


Short term...tonight through Monday...thoughts have changed little 
from the previous overnight shift. Models remained very consistent 
with the progression of the system across the area. With a couple of 
pronounced issues dealt with today. 


First, decided to follow the surface low as shown by the NAM with 
the 18z GFS now lending the closest support of recent runs. This 
gives a very tight pressure gradient across most of the area as the 
surface low tracks across the Washington Cascades and the lower 
Columbia Basin before lifting northeast later tomorrow. These 
gradients, combined with a very stable lower level air mass, will 
give a prolonged period of strong winds aloft down toward the 
surface. Will issue numerous wind advisories and high wind warnings 
as a result. 


The second issue deals with snowfall. Snow level will be somewhat 
variable with a brief period of warm air advection as warm diffluent 
air crosses the Cascades tonight. The Washington Cascades will see 
significant accumulations mainly tonight with the major passes 
impacted. Do think mainly western areas will bear the brunt after 
the cold front passes later tonight and Sunday. The Blue Mountains 
will start seeing accumulations later tonight at the higher 
elevations and passes but snow levels will drop and accumulation 
rates will increase mainly tomorrow after the cold front passes and 
a northwesterly flow develops. Both areas will see significant 
blowing snow but dont have the confidence to go with a Blizzard 
Warning, but it bears watching however. 


Other mountain areas will see snow and maybe some blowing as well, 
but should stay below advisory amounts. Precipitation should begin 
tapering off across the west by tomorrow afternoon and gradually 
taper off across the east tomorrow evening. /Jbonk 




Long term...Monday night through Saturday...a weak system will 
break up Monday night it rides over a building upper level ridge. 
The building ridge will move slowly east over the Pacific northwest 
Tuesday. The departing system will combine will upslope flow in the 
mountains to keep a slight chance of showers in northeast Oregon 
Tuesday. Also...slopover precipitation may occur near the Cascades. 
Subsidence associated with the ridge will provide light winds and 
clearing skies with the strong surface inversions Tuesday night. In 
the lower Columbia Basin patchy fog and freezing fog will form at 
night under the inversions and keep daytime temperatures Wednesday 
below normal. At higher elevations the surface inversions will break 
during the day and warmer air aloft associated with the ridge will 
reach the surface to produce large diurnal temperature spreads. 
Wednesday night through Friday there are dramatic differences 
between the GFS and European model (ecmwf) models even though both have southwest 
flow at 500 mb. The 0z European model (ecmwf) has a more progressive pattern with a 
front at an angle to the 500 mb flow that will move into eastern 
Washington and Oregon and form a deformation zone over the Blue 
Mountains that drops half an inch of rain Thursday. The 12z GFS has 
the front parallel to the 500 mb flow so it remains offshore until 
Friday. The GFS ensemble runs show 500 mb flow running to both 
extremes with no clustering. Decided to make little change to 
existing forecast with a chance of probability of precipitation most places and likely probability of precipitation 
over the mountains. Think European model (ecmwf) is overblown with amount of 
precipitation unless the deformation band does set up...but did 
trend toward it by keeping at least a chance of probability of precipitation across the 
area. When the 12z run of the European model (ecmwf) arrived it was slower with no 
deformation band...but it still supported the faster arrival of the 
front during the day Thursday. Both models had precipitation Friday 
with the GFS pushing the front through and the European model (ecmwf) moving the 
upper level trough through. With low confidence due to model 
differences kept a low chance probability of precipitation across the area Saturday. 
Coonfield 


&& 


Aviation...0z tafs...VFR conditions will prevail in most areas 
through 04z with broken middle level ceilings. Another Pacific weather 
system will move into the area tonight and early Sunday morning with 
rain and mountain snow. This will cause areas of MVFR conditions. 
IFR with possibly even LIFR conditions in local areas with rain and 
snow...especially near any mountain ranges or over the central 
Oregon plateaus near taf site krdm. Winds of 10 to 20 kts with gusts 
to 30 kts from the southwest will be common in all areas today. 
However the winds will increase overnight tonight as pressure 
gradients tighten up ahead of the next weather system. During that 
time winds are expected to increase to at least 15 to 25 kts with 
gusts to 40 kts or possibly even higher into Sunday. 76 




Preliminary point temps/pops... 
PDT 41 47 31 43 / 80 70 10 10 
alw 39 48 32 43 / 90 80 10 10 
psc 37 51 30 44 / 90 50 10 10 
ykm 32 45 29 44 / 90 40 10 10 
hri 38 49 29 45 / 80 50 10 10 
eln 34 39 26 39 / 90 70 10 20 
rdm 35 45 24 47 / 80 40 10 10 
lgd 36 42 23 40 / 80 80 20 10 
gcd 34 41 21 44 / 70 60 10 10 
dls 37 49 32 47 / 80 40 20 10 


&& 


PDT watches/warnings/advisories... 
or...High Wind Warning from 7 PM this evening to 10 am PST Sunday for 
orz049-050. 


Winter Storm Warning from 10 PM this evening to 7 PM PST Sunday 
for orz502. 


High Wind Warning from 1 am to 4 PM PST Sunday for orz042. 


Wind Advisory from 10 PM this evening to 1 PM PST Sunday for 
orz043. 


Wind Advisory from 10 PM this evening to 7 PM PST Sunday for 
orz501-504. 


Winter Weather Advisory from 10 PM this evening to 7 PM PST 
Sunday for orz503. 


Wind Advisory from 4 am to 4 PM PST Sunday for orz041-044. 


Washington...Winter Weather Advisory from 7 PM this evening to 4 PM PST 
Sunday for waz501-502. 


Winter Storm Warning from 10 PM this evening to 7 PM PST Sunday 
for waz030. 


Wind Advisory from 10 PM this evening to 7 PM PST Sunday for 
waz029. 


Wind Advisory from 4 am to 4 PM PST Sunday for waz024-028. 


&& 


Threat index 
Sunday : red 
Monday : green 
Tuesday : green 


Green: none or limited need for watches, warnings, or advisories. 
Yellow: a few watches, warnings, or advisories possible or in effect. 
Red: numerous watches, warnings, or advisories possible or in effect. 


For additional weather information, check our web site at... 
www.Weather.Gov/Pendleton 


$$ 


87/76/76 












National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Powered by the Weather Underground, Inc.