Public Information Statement
Issued by NWS Pendleton, OR

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000
NOUS46 KPDT 050109
PNSPDT

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OREGON
509 PM PDT THU FEB 4 2015

...JANUARY 2015 MONTH IN REVIEW FOR NORTHEAST OREGON AND SOUTHEAST
WASHINGTON...

I.  TEMPERATURE AND PRECIPITATION OVERVIEW

     JANUARY AVERAGE TEMPERATURES WERE ABOVE NORMAL WITH MANY LOCATIONS
REPORTING RECORD WARMEST TEMPERATURES FOR THE CALENDAR MONTH.  TOTAL
PRECIPITATION WAS BELOW NORMAL ACROSS THE AREA, WITH THE LOWER COLUMBIA
BASIN OF WASHINGTON STATE BEING ONLY SLIGHTLY BELOW NORMAL.  SNOWFALL
AMOUNTS WERE BELOW NORMAL THROUGHOUT THE ENTIRE REGION.

JANUARY 2015 DATA AND DEPARTURE FROM NORMAL FOR SELECTED CITIES:

                   MAX   DEP    MIN   DEP    AVE   DEP   PCPN    DEP
                  TEMP  NORM   TEMP  NORM   TEMP  NORM   TOTL   NORM
YAKIMA            40.9  +2.3   28.5  +5.2   34.7  +3.7   0.70  -0.44
KENNEWICK         41.5   0.0   31.9  +2.4   36.7  +1.2   1.03  -0.05
WALLA WALLA       42.5  +1.6   32.2  +2.1   37.4  +1.9   1.25  -1.28
THE DALLES        44.8  +2.6   34.0  +3.0   39.4  +2.8   2.16  -0.34
REDMOND           48.1  +5.7   26.9  +3.8   37.5  +4.8   0.28  -0.69
PENDLETON AIRPORT 42.2  +0.4   29.9  +1.1   36.1  +0.8   0.72  -0.71
LA GRANDE         40.5  +2.1   24.4  -0.1   32.5  +1.1   0.74  -0.89

II.  SELECTED RECORDS

JANUARY 24TH THROUGH THE 27TH WAS A PERIOD WHERE AN UNUSUALLY
STRONG RIDGE MOVED ACROSS THE WESTERN UNITED STATES.  THE LOW SUN ANGLE
IN THE MONTH OF JANUARY, THOUGH, TENDED TO RESULT IN LOW LEVEL COLD AIR
DRAINAGE IN THE LOWER COLUMBIA BASIN, THE KITTITAS VALLEY AND THE
YAKIMA VALLEY THAT RESULTED IN AN INVERSION FORMING AS WELL AS LOW FOG
AND STRATUS.  HOWEVER, WIDE SWATHS OF CENTRAL OREGON, AND THOSE AREAS
THAT BROKE OUT OF THE FOG AND STRATUS BELOW 3000 FEET, RECORDED HIGH
TEMPERATURES THAT RANKED IN THE TOP 10 FOR THE MONTH OF 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 7 LOCATIONS SET MULTIPLE JANUARY TOP 5 RECORD HIGH
TEMPERATURES AND, IN A FEW INSTANCES, SET THEIR RECORDS ON CONSECUTIVE
DAYS.  THE FOLLOWING TABLE LISTS THE LOCATION AND THE RANKS, WITH DATES
OF OCCURRENCE, OF THE JANUARY RECORD HIGH TEMPERATURES:

REDMOND, OR     1ST (69 ON 1/25), 2ND (T, 1/24) AND 5TH (T, 66 ON 1/26)
ANTELOPE, OR    1ST (70 ON 1/26 & 1/27) AND 4TH (67 ON 1/25)
CONDON, OR      1ST (71 ON 1/27), 2ND (69 ON 1/26) AND 4TH (65 ON 1/25)
LONG CREEK, OR  1ST (67 ON 1/26) AND 2ND (T, 62 ON 1/27)
BICKLETON, WA   2ND (61 ON 1/27) AND 3RD (T, 60 ON 1/26)
GOLDENDALE, WA  1ST (66 ON 1/26) AND 2ND (64 ON 1/25)
SATUS PASS, WA  1ST (62 ON 1/25) AND 2ND (61 ON 1/26)

SURPRISINGLY FEW RECORD WARM OVERNIGHT LOW TEMPERATURES WERE
RECORDED DURING THE PERIOD OF JANUARY 25TH TO THE 27TH.   THE MAIN REASON
BEHIND THIS IS DUE TO THE MUCH DRIER AIR THAT MOVED IN OVER THE REGION
AS THE RIDGE OF HIGH PRESSURE WAS MOVING ACROSS.  ONLY A SMALL HANDFUL
OF LOCATIONS RECORDED THEIR TOP 10 WARMEST OVERNIGHT LOW TEMPERATURES
FOR THE MONTH OF JANUARY.  THE FOLLOWING TABLE LISTS THE LOCATION, THE
RANK, THE OVERNIGHT LOW TEMPERATURE WITH DATE OF OCCURRENCE, AND THE
RECORD WARMEST OVERNIGHT LOW TEMPERATURE FOR THE MONTH OF JANUARY.

CITY                RANK      JAN 2015 MIN T          WARMEST JAN MIN T
MEACHAM, OR         #4(T)     41 ON 1/26              47 ON 1/30/1971
CONDON, OR          #6(T)     45 ON 1/26              50 ON 1/30/1971
BICKLETON, WA       #9(T)     41 ON 1/27              45 ON 1/19/2005

THE MEAN SYNOPTIC PATTERN FOR THE MONTH OF JANUARY 2015 WAS
CHARACTERIZED WITH A RIDGE AXIS THAT WAS OVER THE CASCADES.  THIS
HELPED KEEP THE AREA DRY BY DEFLECTING THE MAIN STORM TRACK WELL NORTH
OF OUR AREA FOR THE MAJORITY OF THE MONTH.  AS SHOWN ON THE FIGURE ON
THE RIGHT, ANOMALOUSLY HIGH VALUES, OR VALUES THAT ARE ABOVE THE
EXPECTED CLIMATOLOGICAL NORM, WAS CENTERED OVER THE PACIFIC NORTHWEST.
NUMEROUS TOP 10 AVERAGE HIGH TEMPERATURES WERE SET THROUGHOUT THE MONTH
OF JANUARY, WITH THE GREATEST CONCENTRATION OF THESE RECORDS BEING SET
OVER CENTRAL OREGON.  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
PRINEVILLE, OR        #6         49.5                 58.6 IN 1902
SISTERS, OR           #9         44.8                 47.5 IN 1994
HERMISTON, OR         #9         41.7                 49.8 IN 2006
BICKLETON, WA         #9         39.7                 45.7 IN 1994
JOHN DAY, OR          #10        45.9                 49.5 IN 1954

A FEW TOP 10 WARMEST JANUARY AVERAGE LOW TEMPERATURE RECORDS
WERE SET THROUGHOUT THE AREA, BUT NONE BROKE ANY OF THE PRIOR RECORDS
SET.  OVERNIGHT LOW TEMPERATURES WERE NOT AS WARM AS WOULD BE EXPECTED
IN CENTRAL OREGON DUE TO THE DRY AIR IN PLACE ALONG THE HIGHER
ELEVATIONS.  THIS ALLOWED SIGNIFICANT RADIATIONAL COOLING TO OCCUR AT
THOSE SITES THAT HAD BEEN SETTING RECORD HIGHS IN LATE JANUARY. THE
FOLLOWING TABLE LISTS THE LOCATION, THE RANK, THE AVERAGE JANUARY LOW
TEMPERATURE, AND THE RECORD WARMEST AVERAGE JANUARY LOW TEMPERATURE OR
THE PREVIOUS RECORD IN CASES WHERE THE 2015 TEMPERATURE WAS THE NEW
RECORD.

CITY              RANK       JAN 2015 AVG MIN T   WARMEST JAN AVG MIN T
HERMISTON, OR     #5         30.5                 34.9 IN 2003
PRINEVILLE, OR    #5         28.8                 32.8 IN 2010
SATUS PASS, WA    #5         27.6                 29.7 IN 2010
YAKIMA, WA        #7         28.5                 35.3 IN 1981
THE DALLES, OR    #10        34.0                 37.5 IN 2003
BICKLETON, WA     #10        28.0                 31.2 IN 1934
MEACHAM, OR       #10        24.5                 31.3 IN 1953

THE COMBINATION OF RECORD HIGH TEMPERATURES AND SOME LOCATIONS
REPORTING WARM OVERNIGHT LOWS HELPED CONTRIBUTE TO SEVERAL JANUARY TOP
10 AVERAGE TEMPERATURE RECORDS BEING SET.  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

III.  SIGNIFICANT WEATHER

ON JANUARY 4TH A WEAK DISTURBANCE MOVED INTO THE REGION BRINGING A
MIXTURE OF SNOW, SLEET AND FREEZING RAIN TO PARTS OF NORTHERN OREGON
AND SOUTHERN WASHINGTON. WITH COLD AIR IN PLACE (5000 FOOT TEMPERATURES
BETWEEN 0 TO -5C) PRECIPITATION BEGAN AS SNOW ALONG THE EAST SLOPES OF
THE WASHINGTON CASCADES AND THE KITTITAS VALLEY REGION DURING THE LATE
MORNING HOURS ON JANUARY 4TH. THE LIGHT SNOW CONTINUED HERE THROUGH THE
EARLY EVENING HOURS, BEFORE CHANGING TO A MIXTURE OF SLEET AND FREEZING
RAIN. THIS MIX THEN CONTINUED INTO THE OVERNIGHT HOURS BEFORE
CHANGING TO RAIN PRIOR TO DAYBREAK ON THE JANUARY 5TH. UP TO 0.25 INCHES
OF ICE AND SEVERAL INCHES OF SNOW ACCUMULATED ALONG THE EAST SLOPES
OF THE WASHINGTON CASCADES AND KITTITAS VALLEY REGION. UP TO AN INCH
OF SNOW AND COATINGS OF ICE ALSO FELL IN THE TRI-CITIES DURING THIS
SYSTEM, MAKING IT THEIR SECOND OFFICIAL ACCUMULATING SNOWFALL OF THE
SEASON. SNOW FELL DURING THE EVENING HOURS ON JANUARY 4TH IN
PORTIONS OF WALLOWA, UNION AND COLUMBIA COUNTIES. THE SNOW AGAIN
CHANGED TO RAIN BEFORE SUNRISE ON JANUARY 5TH, BUT NOT BEFORE 4 TO
8 OF SNOW ACCUMULATED NEAR ELGIN, FLORA AND NORTH POWDER OREGON AS
WELL AS NEAR SKI BLUEWOOD IN SOUTHERN WASHINGTON.

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 PRODUCED 2 TO 5 INCHES OF SNOW ALONG THE
EAST SLOPES OF THE WASHINGTON CASCADES, INCLUDING A 5.0 INCH REPORT NEAR
TROUT LAKE, WA.

ANOTHER STORM AFFECTED MUCH OF THE REGION DURING THE DAY ON JANUARY
17TH. THIS SYSTEM HAD PLENTY OF MOISTURE TO WORK WITH AND THUS BROUGHT A
WIDESPREAD STEADY RAINFALL TO THE AREA. RAINFALL TOTALS RANGED FROM
0.25 TO 0.75 INCHES IN MANY LOWER ELEVATIONS AND BASINS, INCLUDING
0.92 INCHES AT PRINEVILLE, 0.57 INCHES AT YAKIMA, 0.42 INCHES AT
PASCO, AND 0.35 INCHES AT PENDLETON. RAINFALL TOTALS OF 0.75 TO 2.00
INCHES WERE COMMON ACROSS THE HIGHER ELEVATIONS AND MOUNTAINS OF THE
REGION. TWO TOP 10 DAILY RAINFALL REPORTS FOR THE MONTH OF JANUARY
WERE ALSO RECEIVED FROM THIS STORM; THE DALLES, OR HAD 1.45 INCHES OF
RAIN, WHICH IS THE 3RD HIGHEST 1-DAY JANUARY RAINFALL ON RECORD. THE
HIGHEST 1-DAY JANUARY RAINFALL ON RECORD AT THE DALLES IS 1.82 INCHES
WHICH WAS FELL ON 01/01/2009. DURING THIS STORM GOLDENDALE, WA
RECEIVED 1.25 INCHES OF RAIN, WHICH RANKS AS THE 7TH HIGHEST 1-DAY
RAIN TOTAL IN THE MONTH OF JANUARY. THE HIGHEST 1-DAY JANUARY
RAINFALL ON RECORD AT GOLDENDALE IS 3.00 INCHES, WHICH FELL ON 01/05/1912.






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