Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 041814 CCA
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
1014 AM PST WED JAN 4 2017

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2016

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            51   12/03        MM      MM       64  12/09
LOWEST              0   12/18        MM      MM       18  12/31
                        12/17                             12/01
AVG. MAXIMUM     34.6              39.5    -4.9     42.8
AVG. MINIMUM     22.7              28.0    -5.3     31.6
MEAN             28.7              33.7    -5.0     37.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     12               5.5     6.5        4
DAYS MIN <= 32     30              20.6     9.4       19
DAYS MIN <= 0       2               0.2     1.8        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.88   1882
 MINIMUM         0.14   1970
TOTALS           1.59              0.97    0.62     1.59
DAILY AVG.       0.05              0.03    0.02     0.05
DAYS >= .01        15              10.6     4.4       14
DAYS >= .10         7               3.7     3.3        6
DAYS >= .50         0               0.1    -0.1        1
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.54   12/14 TO 12/15           12/07 TO 12/07

SNOWFALL (INCHES)
RECORDS
 TOTAL           18.7   1968
TOTALS           19.7R              3.5    16.2      5.7
SINCE 7/1        19.7               5.3    14.4      5.7
SNOWDEPTH AVG.      2                 1       1        0
DAYS >= 1.0         7               1.6     5.4        2
GREATEST
 SNOW DEPTH         8R  12/17                          3  12/23
                        12/16
                        12/15
 24 HR TOTAL      5.0   12/14 TO 12/14           12/07 TO 12/07

DEGREE_DAYS
HEATING TOTAL    1118               968     150      827
 SINCE 7/1       2067              2208    -141     1830
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        863               807      56     1215
........................................................

WIND (MPH)
AVERAGE WIND SPEED              7.3
HIGHEST WIND SPEED/DIRECTION    41/180    DATE  12/19
HIGHEST GUST SPEED/DIRECTION    54/180    DATE  12/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               18     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      6
HAZE                      4

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

$$

AFTER A RECORD WET OCTOBER AND NEAR RECORD WARM NOVEMBER...THE
PATTERN CHANGED ONCE AGAIN IN DECEMBER.  A COLDER PATTERN DEVELOPED
ACROSS THE REGION WITH BELOW NORMAL TEMPERATURES AND ABOVE NORMAL
SNOW ACROSS SOUTHEAST WASHINGTON INTO THE SOUTH IDAHO PANHANDLE.
LEWISTON RECORDED ITS SNOWIEST DECEMBER ON RECORD WITH 19.7 INCHES.
MOST OF THE STORMS FROM THE 6TH THROUGH THE 13TH WERE WEAKER IN
NATURE BRINGING SEVERAL ROUNDS OF LIGHT SNOW.  A STRONGER STORM
PASSING THROUGH OREGON ON THE 14TH AND 15TH RESULTED IN A BAND OF
HEAVY SNOW SETTING UP OVER THE LEWISTON AREA WITH 7.6 INCHES. THIS
WAS FOLLOWED BY A BRIEF ARCTIC FREEZE ON THE 16TH AND 17TH WITH LOW
TEMPERATURES NEAR ZERO IN LEWISTON.  TEMPERATURES WERE EVEN COLDER
ON THE PALOUSE WITH A LOW OF -12 IN PULLMAN. A STRONGER STORM ON THE
19TH AND 20TH BROUGHT STRONG SOUTH WINDS TO LEWISTON WHICH MELTED
MOST OF THE SNOW. A PEAK WIND OF 54 MPH WAS MEASURED IN LEWISTON ON
THE 19TH. THE STORM ALSO BROUGHT FREEZING RAIN AND BLOWING SNOW TO
THE ANATONE AREA. ON THE 23RD INTO THE 24TH SNOW RETURNED WITH 2 TO
5 INCHES IN THE AREA WITH 7 INCHES REPORTED IN NEZ PERCE.  YET
ANOTHER STORM ON THE 26TH AND 27TH BROUGHT 2 TO 4 INCHES OF SNOW AND
WINDY CONDITIONS ON THE PALOUSE.

A COUPLE SNOWFALL RECORDS WERE SET DURING THE MONTH AT THE LEWISTON
AIRPORT.  THE SNOWIEST DECEMBER ON RECORD WAS RECORDED WITH 19.7
INCHES.  DAILY SNOWFALL RECORDS OF 5.0 AND 2.6 INCHES WERE SET ON
THE 14TH AND 15TH RESPECTIVELY.


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