Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 091230 CCA
CLMLWS

CLIMATE REPORT...CORRECTED FORMAT
NATIONAL WEATHER SERVICE SPOKANE, WA
1230 AM PST THU JAN 1 2015

...................................

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              67   12/12/1921
 LOW              -23   12/13/1919
HIGHEST            66   12/11        MM      MM       56  12/01
LOWEST             13   12/31        MM      MM        0  12/08
                        12/30
AVG. MAXIMUM     43.6              39.5     4.1     37.5
AVG. MINIMUM     32.1              28.0     4.1     23.9
MEAN             37.9              33.7     4.2     30.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      6               5.5     0.5        8
DAYS MIN <= 32     14              20.6    -6.6       26
DAYS MIN <= 0       0               0.2    -0.2        1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.88   1882
 MINIMUM         0.14   1970
TOTALS           1.84              0.97    0.87     0.73
DAILY AVG.       0.06              0.03    0.03     0.02
DAYS >= .01        11              10.6     0.4       11
DAYS >= .10         6               3.7     2.3        2
DAYS >= .50         0               0.1    -0.1        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.41   12/20 TO 12/20           12/01 TO 12/01

SNOWFALL (INCHES)
RECORDS
 TOTAL           18.7   1968
TOTALS              T               3.5    -3.5      2.5
SINCE 7/1           T               5.3    -5.3      2.5
SNOWDEPTH AVG.      0                 1      -1        0
DAYS >= 1.0         0               1.6    -1.6        1
GREATEST
 SNOW DEPTH         0   MM                             2  12/20
 24 HR TOTAL        T   12/29 TO 12/29           12/01 TO 12/01

DEGREE_DAYS
HEATING TOTAL     832               968    -136     1054
 SINCE 7/1       1810              2208    -398     2408
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1095               807     288     1178
..................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    37/280    DATE  12/21
HIGHEST GUST SPEED/DIRECTION    50/290    DATE  12/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY         16

AVERAGE RH (PERCENT)     78

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      8
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&
--------------------------------------------------------------------
DECEMBER 2014 STARTED OFF ON A COOL AND DRY NOTE OVER SOUTHEAST
WASHINGTON AND THE SOUTH IDAHO PANHANDLE.  A MUCH MILDER PATTERN
DEVELOPED ON THE 4TH THROUGH CHRISTMAS EVE WITH OCCASIONAL RAIN.
DURING THIS TRANSITION FROM COOL TO WARM...A PERIOD OF FREEZING RAIN
OCCURRED IN LEWISTON...CLARKSTON...AND PULLMAN WITH A TENTH OF AN
INCH OF ICE ACCUMULATION.

TEMPERATURES WERE EXCEPTIONALLY WARM ON THE 11TH WHERE LEWISTON
AIRPORT REACHED 66 DEGREES...WHICH WAS 1 DEGREE SHY OF THE MONTHLY
RECORD.  THE WETTEST STORM OCCURRED ON THE 19TH AND 20TH WITH
PULLMAN RECEIVING AN INCH OF RAIN OVER THE 2 DAY PERIOD.

ON CHRISTMAS EVE A COLD FRONT BROUGHT LOWERING SNOW LEVELS TO NEAR
2500 FEET WITH HEAVY SNOW FALLING IN THE BLUE MOUNTAINS...CAMAS
PRAIRIE...AND CENTRAL PANHANDLE MOUNTAINS.   WINCHESTER PICKED UP 6
INCHES WITH LOOKOUT PASS COMING IN WITH 11 INCHES.

THE MONTH ENDED WITH A MUCH MORE WINTER LIKE CONDITIONS.  ON THE
27TH AND 28TH A COOLER SYSTEM CAME DOWN FROM THE GULF OF ALASKA.
ACCUMULATIONS WERE DEPENDENT ON ELEVATION WITH 6 TO 8 INCHES FALLING
IN THE BLUE MOUNTAINS AND CAMAS PRAIRIE...2 TO 4 INCHES ON THE
PALOUSE...WITH ONLY A TRACE IN LEWISTON.

A VERY COLD ARCTIC AIR MASS MOVED INTO THE AREA TO FINISH OUT THE
MONTH.

A COUPLE RECORDS WERE BROKEN DURING THE MONTH AT THE LEWISTON
AIRPORT.  ON THE 11TH A HIGH TEMPERATURE OF 66 DEGREES BROKE THE
RECORD FOR THE DATE.  THE LOW TEMPERATURE OF 51 ALSO BROKE A RECORD
FOR THE WARMEST READING FOR THE DATE.  ON THE 21ST A HIGH
TEMPERATURE OF 60 DEGREES BROKE THE RECORD FOR THE DATE.  THE LOW
TEMPERATURE OF 47 DEGREES ALSO BROKE A RECORD FOR THE WARMEST
READING FOR THE DATE.
$$


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