La Grande, Oregon Weather Conditions

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Current Conditions

  • 39°
  • Clear
  • Wind: NW 5 mph
  • Humidity: 61%
  • Visibility: 10.0 miles
  • Dew Point: 27°
  • Pressure: 30.32 in. -
  • Heat Index: 36

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12  am
3  am
6  am
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12  pm
Clear
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Partly Cloudy
  • High: 67 °
  • Low: 39 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 73 °
  • Low: 45 °
  • Partly Cloudy
  • Tuesday
  • Chance of Rain
  • High: 50 °
  • Low: 32 °
  • Chance of Rain
  • Wednesday
  • Mostly Cloudy
  • High: 50 °
  • Low: 33 °
  • Mostly Cloudy
  • Thursday
  • Rain
  • High: 50 °
  • Low: 30 °
  • Rain

Forecast for La Grande, Oregon

Updated: 11:17 PM PDT on January 28, 2015

  • Sunday

    Cloudy skies early, then partly cloudy in the afternoon. High 67F. Winds SSE at 5 to 10 mph.

  • Sunday Night

    Mostly clear skies. Low 39F. Winds S at 5 to 10 mph.

  • Monday

    Partly cloudy skies. High 73F. Winds SSE at 10 to 20 mph.

  • Monday Night

    Partly cloudy. Low near 45F. Winds WSW at 5 to 10 mph.

  • Tuesday

    Cloudy with periods of light rain. Becoming windy late. High near 50F. Winds WNW at 20 to 30 mph. Chance of rain 80%.

  • Tuesday Night

    Partly cloudy. Low 32F. Winds WSW at 10 to 20 mph.

  • Wednesday

    Mainly cloudy. High near 50F. Winds W at 10 to 15 mph.

  • Wednesday Night

    Considerable clouds early. Some decrease in clouds late. Low 33F. Winds WNW at 5 to 10 mph.

  • Thursday

    Cloudy with rain and snow showers in the morning. Partial clearing in the afternoon. High near 50F. Winds WNW at 10 to 20 mph. Chance of rain 30%.

  • Thursday Night

    Partly cloudy skies. Low near 30F. Winds WSW at 5 to 10 mph.

  • Friday

    Sunshine and some clouds. High near 55F. Winds S at 10 to 15 mph.

  • Friday Night

    Partly to mostly cloudy. Low 33F. Winds SSE at 5 to 10 mph.

  • Saturday

    Sunshine and clouds mixed. High near 55F. Winds SSE at 10 to 20 mph.

  • Saturday Night

    A few clouds. Low 33F. Winds SW at 5 to 10 mph.

  • Sunday

    Partly cloudy early followed by some light rain later in the day. High 49F. Winds W at 10 to 15 mph. Chance of rain 60%.

  • Sunday Night

    Rain showers early mixing with snow showers late. Low 29F. Winds SW at 5 to 10 mph. Chance of precip 60%.

  • Monday

    Partly cloudy early then becoming cloudy with periods of light rain later in the day. High 51F. Winds WSW at 10 to 20 mph. Chance of rain 60%.

  • Monday Night

    Cloudy with showers. Low 32F. Winds WSW at 5 to 10 mph. Chance of rain 50%.

  • Tuesday

    Cloudy with showers. High 53F. Winds W at 10 to 20 mph. Chance of rain 50%.

  • Tuesday Night

    Rain showers in the evening changing to snow showers overnight. Low 34F. Winds WSW at 5 to 10 mph. Chance of precip 50%.

  • Wednesday

    Rain showers in the morning becoming more intermittent in the afternoon. High 58F. Winds WSW at 10 to 20 mph. Chance of rain 40%.

  • Wednesday Night

    Showers in the evening, then partly cloudy overnight. Low 37F. Winds SW at 10 to 15 mph. Chance of rain 40%.

Severe Weather Alert Descriptions

 Record Report  Statement as of 12:56 PM PDT on March 28, 2015


... New daily record high temperatures for March 28th...

Note: stations marked with * indicate that the station reports once
per day. For consistency... these values are considered to have
occurred on the day the observation was taken but may have actually
occurred (especially for Max temperature) on the previous day.

Station previous new records
                         record/year record began

*condon, or 73 / 1923 78 1894
*heppner, or 73 / 1994 74 1889
*john day(city), or 76 / 1986 77 1891
*long creek, or 72 / 1978 77 1908
*pendleton(city), or 76 / 1923 79 1889
*satus pass, WA 66 / 1969 73 1967
*whitman mission, WA 75 / 1986 78 1962



 Public Information Statement  Statement as of 7:00 PM PDT on March 28, 2015


... Winter 2014-2015 season in review for northeast Oregon and
southeast Washington for the months of December, January and
February...
... Numerous record warm temperatures set...

I. Temperature and precipitation overview

Meteorological winter (dec-Jan-feb) 2014-2015 was characterized by a
semi-permanent West Coast upper level ridge which lead to average
temperatures being 3 to 6 degrees above normal across the entire
region. Precipitation totals varied from slightly above normal in
the Grande Ronde Valley and Blue Mountain foothills to slightly
below normal elsewhere. Snowfall for the three month period was well
below normal for all climate sites surveyed in this report, with
Yakima, WA recording its least snowy meteorological winter on
record. The highest snow totals for the three month period were
recorded at Redmond and La Grande, or where just over 5 inches
fell. The average temperature ranked in the top twelve warmest for
the period of record at all sites, with Yakima, WA and Redmond, or
reporting their second warmest winter on record.


Meteorological winter 2014-15 data and departure from normal for
selected cities:

            Max dep min dep Ave dep pcpn dep snow dep
            temp norm temp norm temp norm totl norm totl norm
La Grande 46.0 +6.4 28.3 +3.6 37.2 +5.0 5.29 +0.86 5.2 -3.7
Pendleton 45.9 +3.2 31.5 +2.8 38.7 +3.0 4.35 +0.34 2.6 -10.4
Redmond 47.7 +4.5 27.0 +4.5 37.3 +4.5 2.56 -0.22 5.3 -6.6
The Dalles 48.2 +4.7 34.9 +3.9 41.5 +4.3 5.92 -1.08 M M
Kennewick 46.7 +3.6 32.9 +3.2 39.8 +3.4 2.97 -0.02 M M
Walla Walla 47.1 +5.3 34.2 +4.0 40.7 +4.7 6.50 -0.26 0.5 -8.9
Yakima 46.6 +6.4 29.5 +6.0 38.0 +6.1 2.61 -0.84 1.6 -15.7

Rank table below: #1 = warmest/wettest/least snowy in period of record
(last column shows the year records began)

La Grande #1(t) N/A #6 N/A #3 N/A #19 N/A #12 1965
Pendleton #13 N/A #15 N/A #12 N/A #36 N/A #9 1927
Redmond #2 N/A #7 N/A #2 N/A #34 N/A #15(t)1947
The Dalles #4 N/A #3 N/A #3 N/A #40 N/A M 1947
Kennewick #13* N/A #11 N/A #11 N/A #48 N/A M 1893
Walla Walla #6 N/A #7 N/A #5 N/A #26 N/A #7 1948
Yakima #2 N/A #2 N/A #2 N/A #43 N/A #1 1945

*this site had 2 years in which at least one whole month of data was
missing, therefore those years were excluded from the rank.



Ii. Selected records

December:

The following two tables list the weather station, December rank of the
1-day record high or record warm low temperature, the record
temperature with date of occurrence, and the current record temperature
for the month of December or the previous record in cases where the
2014 temperature was the new record.

City rank Dec 2014 Max T warmest Dec Max T
Walla Walla, WA #1 71 on 12/10 68 on 12/26/1980
Hermiston, or #2 69 on 12/11 70 on 12/03/2007
Dayton, WA #5(tied) 67 on 12/11 69 on 12/05/1939
Long Creek, or #5(tied) 59 on 12/11 65 on 12/30/1980
Monument, or #5(tied) 65 on 12/12 70 on 12/10/1993
Whitman mission, WA #5(tied) 67 on 12/10 70 on 12/27/1980

Three record high minimum temperatures in the month of December were
set at Meacham weather station of 44 on the 11th, 43 on the 10th and 42
on the 9th ranked as the first, second and fifth (tied) warmest
December minimum temperatures on record, respectively. Two record
high minimum temperatures at La Grande weather station of 48 on the
11th, and 46 on the 10th ranked as the first (tied) and third (tied)
warmest December minimum temperatures on record, respectively.

City rank Dec 2014 warm min T warmest Dec min T
Meacham, or #1 44 on 12/11 43 on 12/10/2014
Hermiston, or #1(tied) 50 on 12/21 50 on 12/03/2007
La Grande, or #1(tied) 48 on 12/11 48 on 12/09/1981
Long Creek, or #1(tied) 50 on 12/10 50 on 12/16/1980
Heppner, or #2 53 on 12/10 57 on 12/26/1980
Condon, or #4 47 on 12/10 52 on 12/26/1980
Prineville, or #5(tied) 46 on 12/11 50 on 12/04/2007


The Table below lists the weather station, ranking, average monthly
average temperature for December 2014, and the warmest monthly average
temperature on record for the month of December for that station.

City rank Dec 2014 avg T warmest Dec avg T
Yakima, WA #3(tied) 35.9 36.4 in 1953/1966
La Grande, or #3(tied) 37.0 37.8 in 1979
Hermiston, or #4 37.9 38.8 in 1999
Meacham, or #6 32.0 35.4 in 1950


January:

Quite a few locations broke their all-time January high temperature
record, sometimes setting multiple top 5 warmest January warmest
temperatures on record. Three locations recorded the first time that
the mark of 70 degrees or better was reached in the month of January.
The following table lists the weather station, January rank of the 1-
day record high, the record temperature with date of occurrence, and
the current record temperature for the month of January or the previous
record in cases where the 2015 temperature was the new record.

City rank Jan 2015 Max T warmest Jan Max T
Bend, or #1 71 on 1/25 67 on 1/31/1971
Condon, or #1 71 on 1/27 69 on 1/26/2015
Antelope, or #1 70 on 1/26 & 1/27 67 on 1/25/2015
Redmond, or #1 69 on 1/25 67 on 1/24/2015
Moro, or #1 68 on 1/26 65 on 1/01/1918
Long Creek, or #1 67 on 1/26 62 on 1/05/2012
Goldendale, WA #1 66 on 1/26 64 on 1/25/2015
Satus Pass, WA #1 62 on 1/25 60 on 1/31/1971
Bickleton, WA #2 61 on 1/27 66 on 1/31/1971
Meacham, or #2(t) 55 on 1/26 57 on 1/31/1971
John Day, or #3(t) 65 on 1/27 69 on 1/01/1904
Sisters, or #3(t) 63 on 1/26 65 on 1/29/1971
Heppner, or #4(t) 68 on 1/25 70 on 1/20/1968
Madras, or #4(t) 66 on 1/26 69 on 1/31/1995
Hermiston, or #5(t) 62 on 1/24 67 on 1/26/2003
La Grande, or #7(t) 56 on 1/27 61 on 1/31/1971

The following table lists the location, the rank, the average January
high temperature, and the record warmest average January high
temperature or the previous record in cases where the 2015 temperature
was the new record.

City rank Jan 2015 avg Max T warmest Jan avg Max T
Satus Pass, WA #1 41.4 40.9 in 1983
Bend, or #2 47.9 50.6 in 1934
Meacham, or #3 41.3 42.3 in 2014
Antelope, or #4 46.7 50.5 in 1934
Redmond, or #5 48.1 49.4 in 1953
Long Creek, or #5(t) 44.6 47.7 in 1986

The following table lists the location, the rank, the average January
temperature, and the record warmest January average temperature or the
previous record in cases where the 2015 temperature was the new record.

City rank Jan 2015 avg T warmest Jan avg T
Satus Pass, WA #1(t) 34.5 34.5 in 1983
Prineville, or #4 39.2 41.1 in 1902
Meacham, or #4 32.9 36.7 in 1953
Redmond, or #6 37.5 41.4 in 1953
Hermiston, or #6 36.1 41.3 in 2006
Bend, or #7 37.4 40.9 in 1934
Long Creek, or #8 34.6 38.4 in 1986

Due to the storm track being deviated well away from the Pacific
northwest for a majority of the month of January, and the dry weather
that the multiple ridges brought to the area, a few record lowest 10
rainfall totals were set throughout the region. The following table
lists the location, the rank, the January rainfall total, and the
record lowest January rainfall total or the previous record in cases
where the 2015 temperature was the new record.


City rank Jan 2015 precip Jan lowest precip
John Day, or #4 0.35 inches 0.10 inches in 1961
Hermiston, or #4 0.46 inches T in 1999
Redmond, or #9 0.28 inches 0.13 inches in 1984
Heppner, or #10 0.47 inches 0.18 inches in 2013

In addition to the lackluster precipitation totals throughout the
region, the unseasonably warm conditions also contributed to the
following lowest 10 snowfall totals being recorded for the month of
january:

City rank Jan 2015 snowfall Jan lowest snowfall
La Grande, or #1(t) none tied 1988,1994,2010
Meacham, or #3 2.5 inches T in 2014
Long Creek, or #6 0.5 inches 0 in 2003
Bickleton, WA #8(t) T 0 in 2003
Redmond, or #8(t) 0.2 inches 0 in 2007
Heppner, or #10 T 0 in 2014

February:

The following table lists the weather station, February rank of the 1-
day record high, the record temperature with date of occurrence, and
the current record temperature for the month of February or the
previous record in cases where the 2015 temperature was the new record.
A (t) indicates that the temperature tied the record with other dates.

City rank Feb 2015 Max T warmest Feb Max T
Long Creek, or #1 51 on 2/6 47 on 2/8/1996
Hermiston, or #1(t) 68 on 2/7 68 on 2/12/2011
Meacham, or #1(t) 61 on 2/12 61 on 2/28/1968
Walla Walla, WA #3(t) 70 on 2/6 75 on 2/20/1995

The following table lists the weather station, February rank of the 1-
day record warm low temperature, the record temperature with date of
occurrence, and the current record temperature for the month of
February or the previous record in cases where the 2015 temperature was
the new record. A (t) indicates that the temperature tied the record
with other dates.

City rank Feb 2015 min T warmest Feb min T
Long Creek, or #1 51 on 2/6 47 on 2/8/1996
Meacham, or #1 46 on 2/6 43 on 2/4/1963
La Grande, or #2(t) 46 on 2/7 49 on 2/27/1980
Prineville, or #3 50 on 2/6 52 on 2/19/1995
Hermiston, or #3(t) 44 on 2/26 52 on 2/24/1999


The following table lists the location, the rank, the average February
high temperature, and the record warmest average February high
temperature or the previous record in cases where the 2015 temperature
was the new record.

City rank Feb 2015 avg Max T warmest Feb avg Max T
The Dalles, or #1 55.6 55.4 in 1967
Yakima, WA #1 55.5 54.5 in 1967
Hermiston, or #1 54.6 53.1 in 1999
Walla Walla, WA #1 54.5 54.0 in 1991
La Grande, or #1 53.0 49.6 in 1995
Meacham, or #1 47.6 46.2 in 1963
Ellensburg, WA #2 51.8 53.5 in 1934
Condon, or #2 51.1 51.3 in 1963
Moro, or #2 51.0 51.1 in 1991
Pendleton, or #3 53.6 57.1 in 1934
Dayton, WA #3 52.9 55.6 in 1958
Redmond, or #3 35.1 55.9 in 1991


The following table lists the location, the rank, the average
February low temperature, and the record warmest February low
temperature or the previous record in cases where the 2015
temperature was the new record.

City rank Feb 2015 avg min T warmest Feb avg min T
Hermiston, or #2 31.7 32.6 in 1999
Bickleton, WA #3 32.4 32.8 in 1958
The Dalles, or #4 36.8 38.3 in 1958
Walla Walla, WA #4 37.4 39.1 in 1958
Condon, or #4 32.4 33.4 in 1958
Yakima, WA #4 31.6 33.4 in 1958
La Grande, or #4 30.9 32.1 in 1983
Ellensburg, WA #4 29.5 33.1 in 1958
Bend, or #5 29.4 30.9 in 1958
Long Creek, or #5 29.4 32.9 in 1958

The following table lists the location, the rank, the average February
temperature, and the record warmest February average temperature or the
previous record in cases where the 2015 temperature was the new record.

City rank Feb 2015 avg T warmest Feb avg T
The Dalles, or #1 46.2 45.9 in 1958
Yakima, WA #1 43.5 42.7 in 1958
Hermiston, or #1 43.1 42.9 in 1999
La Grande, or #1 42.0 39.6 in 1983
Walla Walla, WA #2 46.0 46.3 in 1958
Condon, or #2 41.7 41.8 in 1958
Goldendale, WA #2 41.4 43.3 in 1958
Meacham, or #2 37.7 39.1 in 1963
Ellensburg, WA #3 40.6 41.3 in 1934
Long Creek, or #3 40.3 42.0 in 1958
Moro, or #4 41.6 42.6 in 1961
Redmond, or #4 40.6 42.7 in 1958
Bend, or #4 40.5 41.3 in 1930
Pelton dam, or #5 44.1 47.2 in 1991
Pendleton, or #5 44.0 46.8 in 1958
Bickleton, WA #5 39.1 40.7 in 1963

Listed below are the locations, the rank, the accumulated snowfall
since December 2014, and the record lowest accumulation for the
Dec-Feb time frame or the previous record if the Dec 2014 to Feb
2015 broke the prior record. The year noted in prior records is for
when the period ends. For example, the year 1963 would include the
December 1962 to February 1963 period. The stations included are
only FAA sites due to the quality control process still ongoing with
all remaining sites.

City rank Dec-feb2015 snow lowest Dec-Feb snow
Yakima, WA #1 1.6 inches 1.7 inches in 1958
Meacham, or #1 30.2 inches 35.4 inches in 1963
Walla Walla, WA #4 0.5 inches none in 2005
Pendleton, or #7 2.6 inches none in 1931
Redmond, or #10 5.3 inches 1.2 inches in 1961


Iii. Significant weather

December:

A cold front and a powerful low pressure system brought widespread
strong winds to much of the region on December 10th and 11th. The
cold front, which was associated with a deep low pressure system off
the northern British Columbia coast, helped to increase the pressure
gradient across the area leading to an increasing south wind during
the day on December 10th. A robust upper level jet aided in the
rapid development of a new area of low pressure off the Oregon coast
by the morning of December 11th. This powerful low pressure system
paralleled the Oregon coast through the day on the 11th and, in
combination with downsloping mountain winds, created damaging winds
in several locations. The hardest hit areas were the Blue Mountains,
Wallowa Mountains and the southern Cascades of Oregon. The following
table lists selected peak wind gusts from each County affected
across the area:

Location time and date peak wind gusts in mph
1 WNW Cayuse, or 10:45 am on the 11th 95
1 NW Heppner, or 01:11 PM on the 11th 88
5 se Dixie, WA 01:11 PM on the 11th 84
Condon, or 10:10 am on the 11th 83
5 WNW Ruggs, or 01:05 PM on the 11th 82
3 N Joseph, or 12:06 PM on the 11th 75
4 SSW Waitsburg, WA 10:32 am on the 11th 71
John Day Airport 08:24 am on the 11th 69
9 ENE Fossil, or 09:30 am on the 11th 67
Lexington, or 11:35 am on the 11th 66
Walla Walla, WA 01:36 PM on the 11th 64
Redmond Airport 11:11 am on the 11th 60
Pendleton Airport 02:00 PM on the 11th 59
13 WSW Mikkalo, or 01:20 am on the 11th 59

Other than the strong damaging winds, the storm system also brought
rather low surface pressures and several periods of rain to much of the
area. The observed minimum pressure readings and four day
precipitation totals from December 9th through the 12th were as follows:

Location pressure reading precipitation amount
Redmond, or 989.2mb 0.12 inches
dalles, or 989.7mb 0.19 inches
Walla, Walla, WA 990.1mb 1.07 inches
Pendleton, or 990.9mb 0.71 inches
Yakima, WA 991.9mb 0.23 inches
Pasco, WA 992.4mb 0.15 inches

Meacham, or also reported 1.50 inches of precipitation during this
four day period, with 2.4 inches of snow on December 12th as snow
levels lowered across the region.

Toward the end of the month on December 28th and 29th an Arctic cold
front with an associated upper level disturbance moved through the
area. This system brought limited moisture into the region, but was
able to combine with a northerly upslope flow to produce localized
areas of moderate to heavy snowfall. The accumulating snowfall mainly
occurred along the foothills of the Blue Mountains, along the Blue
Mountains, along the east slopes of the Washington and Oregon Cascades,
as well as in central Oregon. Little, if any, snow fell in the lower
elevations of the Columbia Basin or in the Columbia River gorge. The
following table lists selected snowfall amounts from each County
affected across the area:

Location time and date snowfall total in inches

2 N Meacham, or 0800 am on the 29th 14.0 inches
1wsw Bend, or 0825 PM on the 29th 13.0 inches
5w Ukiah, or 0800 am on the 29th 12.0 inches
Heppner, or 0100 PM on the 29th 8.0 inches
Bend, or 0452 PM on the 29th 7.0 inches
Pilot Rock, or 0100 PM on the 29th 7.0 inches
Camp Sherman, or 1130 am on the 29th 7.0 inches
2w Bend, or 1015 am on the 29th 6.0 inches
La Grande, or 0830 am on the 29th 4.0 inches
10se Cliffdell, WA 0108 am on the 29th 5.0 inches


January:

On January 15th a stronger weather system moved into the Pacific
northwest and combined with marginally cold air banked up against the
Washington Cascades to produce snow. The snow developed and fell
starting during the midday hours on January 15th in the Yakima Valley,
Kittitas Valley and East Slope of the Washington Cascades. The snow
finally tapered off and ended during the predawn hours of January 16th,
but not before 1 to 4 inches fell in the Yakima and Kittitas Valley
regions. This system pro


Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: La Grande, La Grande, OR

Updated: 12:20 AM PDT

Temperature: 37.8 °F Dew Point: 31 °F Humidity: 76% Wind: Calm Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: La Grande - N. Ash Street, La Grande, OR

Updated: 11:50 PM PDT

Temperature: 41.4 °F Dew Point: - Humidity: 73% Wind: North at 4.3 mph Pressure: 27.40 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: La Grande, La Grande, OR

Updated: 12:20 AM PDT

Temperature: 38.1 °F Dew Point: 34 °F Humidity: 84% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: High School, Imbler, OR

Updated: 12:20 AM PDT

Temperature: 37.7 °F Dew Point: 32 °F Humidity: 81% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Grande View Wireless, Cove, OR

Updated: 12:20 AM PDT

Temperature: 43.0 °F Dew Point: 31 °F Humidity: 62% Wind: ESE at 8.3 mph Pressure: 27.87 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: union, Union, OR

Updated: 12:20 AM PDT

Temperature: 40.8 °F Dew Point: 33 °F Humidity: 73% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: South Main, Union, OR

Updated: 12:11 AM PDT

Temperature: 40.2 °F Dew Point: 32 °F Humidity: 73% Wind: SSE at 4.0 mph Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: 3 north of Elgin, Elgin, OR

Updated: 12:20 AM PDT

Temperature: 33.6 °F Dew Point: 28 °F Humidity: 80% Wind: Calm Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Darr RD, Elgin, OR

Updated: 12:20 AM PDT

Temperature: 32.7 °F Dew Point: 32 °F Humidity: 95% Wind: WNW at 3.6 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: 5 Miles North of Elgin, Elgin, OR

Updated: 12:20 AM PDT

Temperature: 40.1 °F Dew Point: 35 °F Humidity: 81% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Pendleton or 
1017 PM PDT Sat Mar 28 2015 


Updated aviation discussion 


Short term...tonight and Sunday...forecast area will be under a 
Flat Ridge of high pressure with some middle and high level moisture 
moving over the region for partly to mostly cloudy conditions. Could 
see a few showers along the crest of the Washington Cascades but 
otherwise dry. Temperatures will be a few degrees warmer on Sunday 
and winds will be lighter. 


Aviation...06z tafs...VFR conditions will prevail over the next 24 
hours. Some middle and high levels clouds will pass over the region 
overnight through midday Sunday producing scattered-broken 100-150 mean sea level. All 
taf sites will remain below 12 kts. 


&& 


Previous disc... /issued 230 PM PDT Sat Mar 28 2015/ 


Short term...tonight through Tuesday. Westerly flow aloft tonight 
into Sunday. Satellite showing a fair amount of middle and high level 
clouds offshore so expecting partly to mostly cloudy skies. Surface 
winds are decreasing this afternoon as high pressure builds in. This 
trend will continue into the evening hours with light winds later 
tonight. High temperatures tomorrow should be mostly in the 60s. The flow 
aloft turns a little more southwest on Monday as another upper level 
trough approaches the coast. Temperatures will be warmer with partly cloudy 
skies. The upper trough and cold front will move through the area 
late Monday night and Tuesday bringing a chance of rain. Breezy to 
windy conditions Tuesday after frontal passage with much cooler 
temperatures. 94 


Long term...Tuesday night through Saturday...a broad trough will be 
over the area Tuesday night and a front will be moving through the 
area. There will be a chance of showers in the mountains and a 
slight chance in the lower elevations. Colder air with this system 
will bring snow levels down to around 3500 feet and the mountains 
will see a couple of inches of snow. The evening looks windy with 20 
to 30 miles per hour winds over much of the area. The wind and the showers will 
taper off overnight. Models show another disturbance moving into the 
area Wednesday afternoon with another chance of rain and snow 
showers in the mountains and a slight chance of rain showers in the 
lower elevations through Wednesday night. Snow levels will be around 
3000 to 3500 feet. On Thursday the trough will leave to the east and 
a ridge will build offshore. This will keep US in a northwesterly 
flow. This will be a slight chance of lingering showers in the 
morning then a slight chance of upslope rain and snow showers in the 
mountains in the afternoon. Thursday night through Friday morning 
will be a break between systems with dry weather. Friday afternoon 
through Saturday the GFS brings a front and strong trough into the 
area with a chance of rain and mountain snow. The European model (ecmwf) has a weaker 
system that is much slower to come ashore and is just crossing the 
Cascades by Saturday afternoon. For now have split the difference 
and have a chance of rain and snow in the mountains and a slight 
chance of rain in the lower elevations for Friday through Saturday. 
Temperatures will be near normal with highs in the 50s and lower 60s 
and mainly 40s and lower 50s in the mountains. Lows will be in the 
30s and lower 40s with 20s and lower 30s in the mountains. Perry 






&& 


Preliminary point temps/pops... 
PDT 40 65 41 69 / 0 0 0 0 
alw 43 66 44 70 / 0 0 0 0 
psc 42 68 41 72 / 0 0 0 0 
ykm 39 66 39 68 / 0 0 10 0 
hri 41 68 39 72 / 0 0 0 0 
eln 38 65 38 67 / 0 10 10 0 
rdm 32 65 33 69 / 0 0 0 0 
lgd 34 62 35 68 / 0 0 0 10 
gcd 36 64 33 71 / 0 0 10 10 
dls 41 68 40 71 / 0 10 10 10 


&& 


PDT watches/warnings/advisories... 
or...none. 
Washington...none. 
&& 


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


$$ 


91/91/91 












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