Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS56 KOTX 011722
CLMGEG


CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
854 AM PST TUE JAN 1 2019

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

...THE SPOKANE WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              60   12/10/1939
 LOW              -25   12/30/1968
HIGHEST            47   12/20        MM      MM       42  12/19
                        12/18
LOWEST             14   12/06        MM      MM        7  12/24
AVG. MAXIMUM     36.4              32.2     4.2     31.1
AVG. MINIMUM     27.2              22.5     4.7     22.3
MEAN             31.8              27.4     4.4     26.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     10              13.6    -3.6       17
DAYS MIN <= 32     24              26.3    -2.3       29
DAYS MIN <= 0       0               1.1    -1.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.13   1964
 MINIMUM         0.21   1883
TOTALS           2.62              2.30    0.32     2.88
DAILY AVG.       0.08              0.07    0.01     0.09
DAYS >= .01        15              13.2     1.8       13
DAYS >= .10        10               7.2     2.8        5
DAYS >= .50         1               1.1    -0.1        2
DAYS >= 1.00        0               0.1    -0.1        1
GREATEST
 24 HR. TOTAL    0.60   12/18 TO 12/18              1.12

SNOWFALL (INCHES)
RECORDS
 TOTAL           61.5   2008
TOTALS           12.1              14.6    -2.5     17.1
SINCE 7/1        14.7              22.1    -7.4     24.3
SNOWDEPTH AVG.      0                 4      -4        1
DAYS >= 1.0         7               4.7     2.3        5
GREATEST
 SNOW DEPTH         4   12/29                          6  12/17
                                                          12/16
 24 HR TOTAL      2.8   12/26 TO 12/26               7.1

DEGREE_DAYS
HEATING TOTAL    1021              1167    -146     1179
 SINCE 7/1       2582              2834    -252     2719
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        573               450     123      794
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
HIGHEST WIND SPEED/DIRECTION    36/220    DATE  12/29
HIGHEST GUST SPEED/DIRECTION    47/220    DATE  12/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         21

AVERAGE RH (PERCENT)     81

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW               18     SLEET                      0
FOG                      23     FOG W/VIS <= 1/4 MILE     11
HAZE                      1

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

$$

DECEMBER 2018 BROUGHT WARMER THAN NORMAL ALONG WITH WETTER THAN
NORMAL FOR MOST AREAS OF NORTHEAST WASHINGTON INTO THE NORTH IDAHO
PANHANDLE.  THE FIRST NINE DAYS OF THE MONTH STARTED OFF ON A DRY
NOTE WITH JUST ONE BRIEF PERIOD OF SNOW ON THE 1ST.  THE REGION THEN
TRANSITIONED TO A MILD AND WET PATTERN FROM THE 11TH THROUGH THE
20TH AS A SERIES OF STORMS MOVED IN FROM THE WEST AND SOUTHWEST.
WINDY CONDITIONS ALSO DEVELOPED AT TIMES.  THE MILDER WEATHER
BROUGHT A MIX OF RAIN AND SNOW TO THE VALLEYS WHILE THE SNOW PILED
UP IN THE MOUNTAINS.  ON THE 11TH AND 12TH A FOOT OF SNOW FELL IN
THE MOUNTAINS OF NORTH IDAHO WHILE SACHEEN LAKE CAME IN WITH 7
INCHES WITH 4-6 INCHES AROUND CLAYTON AND DEER PARK.  NORTHPORT AND
METALINE FALLS CAME IN WITH 4 INCHES.  ON THE 14TH AND 15TH WINDY
CONDITIONS DEVELOPED WITH A PEAK WIND GUST ON THE 15TH AT THE
SPOKANE AIRPORT OF 46 MPH.  ON THE 17TH AND 18TH AN ATMOSPHERIC
RIVER BROUGHT HEAVY RAIN WITH RATHDRUM REPORTING 1.65 INCHES WITH
1.42 INCHES NEAR DEER PARK.  A COLD FRONT BROUGHT ANOTHER ROUND OF
WINDY WEATHER TO SPOKANE WITH A 42 MPH WIND GUST.  A COOLER SYSTEM
FROM THE NORTHWEST TRACKED THROUGH ON THE 26TH BRINGING 1 TO 3
INCHES OF SNOW ACROSS THE REGION.  A COMPLEX STORM SYSTEM ARRIVED TO
FINISH OUT THE MONTH.  IT BEGAN WITH SNOW WITH 2 TO 4 INCHES FALLING
WITH LOCALLY HIGHER AMOUNTS SUCH AS 6 INCHES IN RATHDRUM LATE ON THE
28TH AND EARLY ON THE 29TH.  SOME AREAS REPORTED A THIN LAYER OF ICE
FROM FREEZING RAIN OR DRIZZLE AFTER THE SNOW ENDED. THEN MILD
SOUTHWEST WINDS MELTED MUCH OF THIS SNOW WITH TEMPERATURES WARMING
INTO THE LOWER TO MID 40S. WINDS PEAKED WITH A STRONG EVENING COLD
FRONT PASSAGE WITH GUSTS TO AROUND 45 MPH IN SPOKANE.

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



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