Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 031429 CCA
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
256 PM PDT TUE JUN 2 2015

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY
2015...


CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             104   05/28/1934
 LOW               23   05/01/1954
HIGHEST            88   05/31        MM      MM       87  05/22
                        05/29
LOWEST             37   05/03        MM      MM       36  05/12
AVG. MAXIMUM     76.7              70.9     5.8     74.8
AVG. MINIMUM     50.3              47.0     3.3     48.2
MEAN             63.5              59.0     4.5     61.5
DAYS MAX >= 90      0               1.2    -1.2        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.78   1978
 MINIMUM            T   2003
                        1924
TOTALS           1.11              1.61   -0.50     0.52
DAILY AVG.       0.04              0.05   -0.01     0.02
DAYS >= .01         8              10.6    -2.6        9
DAYS >= .10         4               5.3    -1.3        3
DAYS >= .50         0               0.5    -0.5        0
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    0.58   05/12 TO 05/13           05/04 TO 05/04


SNOWFALL (INCHES)
RECORDS
 TOTAL            0.3   1916
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         1.5              10.5    -9.0     16.5
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   05/31 TO 05/31           05/31 TO 05/31


DEGREE_DAYS
HEATING TOTAL      87               217    -130      128
 SINCE 7/1       4206              5097    -891     5289
COOLING TOTAL      51                30      21       28
 SINCE 1/1         52                32      20       28
......................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    24/190    DATE  05/13
HIGHEST GUST SPEED/DIRECTION    31/170    DATE  05/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           22
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
---------------------------------------------------------------------
MAY 2015 STARTED OFF WHERE APRIL LEFT OFF WITH WARM AND DRY
CONDITIONS ACROSS SOUTHEAST WASHINGTON INTO THE SOUTH IDAHO
PANHANDLE.  THE PATTERN THEN CHANGED TO A WETTER PATTERN WITH
SHOWERS AND THUNDERSTORMS ALTHOUGH TEMPERATURES REMAINED ABOVE
NORMAL FOR MOST OF THE MONTH.  THE EXCEPTION WAS THE 13TH WHERE A
COOL...CLOUDY...RAINY DAY OCCURRED WITH LEWISTON ONLY REACHING THE
LOWER 60S.  A COCORAHS OBSERVER 2 MILES NORTH OF MOSCOW REPORTED
1.74 INCHES OF RAIN WITH AROUND AN INCH IN POTLATCH...JULIETTA AND
PULLMAN.

A RATHER ACTIVE THUNDERSTORM PATTERN HIT THE REGION FOR THE LATTER
HALF OF THE MONTH. ON THE 16TH HEAVY RAIN FROM THUNDERSTORMS
RESULTED IN FLASH FLOODING NEAR OAKESDALE WITH WATER FLOWING OVER A
ROAD.  JULIETTA OVER A 2 DAY PERIOD ON THE 16TH AND 17TH REPORTED
1.42 INCHES OF RAIN. LEWISTON REPORTED THUNDERSTORMS ON THE
22ND...23RD...25TH...26TH...30TH...AND 31ST.  GIVEN THE CONVECTIVE
NATURE SOME PLACES RECEIVED MODERATE TO HEAVY RAIN WHILE OTHERS SAW
LITTLE TO NO RAIN INCLUDING THE LEWISTON AIRPORT.

NO RECORDS WERE SET DURING THE MONTH AT THE LEWISTON AIRPORT.

$$



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