Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 050530 CCA
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
1030 PM PDT WED APR 4 2018

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MARCH 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              80   03/30/1923
 LOW                2   03/05/1955
HIGHEST            72   03/13        MM      MM       63  03/10
LOWEST             27   03/03        MM      MM       28  03/06
AVG. MAXIMUM     55.8              54.9     0.9     54.0
AVG. MINIMUM     35.1              35.6    -0.5     37.2
MEAN             45.5              45.3     0.2     45.6
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.1    -0.1        0
DAYS MIN <= 32     10               8.0     2.0        6
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.07   1931
 MINIMUM         0.25   1969
TOTALS           1.35              1.15    0.20     3.50
DAILY AVG.       0.04              0.04    0.00     0.11
DAYS >= .01         9              11.2    -2.2       19
DAYS >= .10         4               3.7     0.3       11
DAYS >= .50         0               0.2    -0.2        1
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.49   03/17 TO 03/17              0.74

SNOWFALL (INCHES)
RECORDS
 TOTAL            9.7   1955
TOTALS              T               0.7    -0.7      4.8
SINCE 7/1        14.1              10.5     3.6     39.2
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.2    -0.2        1
GREATEST
 SNOW DEPTH         0   MM                             4  03/05
 24 HR TOTAL        T   03/02 TO 03/02               4.1

DEGREE_DAYS
HEATING TOTAL     596               612     -16      595
 SINCE 7/1       4307              4467    -160     4631
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    33/270    DATE  03/09
HIGHEST GUST SPEED/DIRECTION    45/280    DATE  03/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       4
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

$$

MARCH 2018 FINISHED SLIGHTLY COOLER AND DRIER THAN NORMAL OVER MOST
OF SOUTHEAST WASHINGTON INTO THE SOUTH IDAHO PANHANDLE.  THE MONTH
START OFF ON A COOL NOTE WITH AN UPPER TROUGH OVER THE REGION ON THE
1ST AND 2ND. SOUTHERLY FLOW AHEAD OF A LOW PRESSURE SYSTEM BROUGHT
SEVERAL WAVES INTO THE REGION FROM THE SOUTH. SNOW FELL ON THE
PALOUSE BUT SIGNIFICANT ACCUMULATIONS WERE IN THE MOUNTAINS. AFTER
THE SNOW ENDED COLDER TEMPERATURES FOLLOWED WITH PULLMAN DROPPING TO
16F ON THE 4TH. THE MONTH`S ONLY WARM SPELL SOON FOLLOWED WITH
UNSEASONABLY WARM TEMPERATURES ON THE 12TH AND 13TH WITH HIGHS IN
THE 60S WITH LEWISTON EVEN REACHING 72F ON THE 13TH.  ON THE 17TH A
BAND OF SNOW HIT THE CAMAS PRAIRIE WITH WINCHESTER REPORTING 6
INCHES.  A STRONG COLD FRONT ARRIVED ON THE 22ND BRINGING SHOWERS
WITH WIND GUSTS IN SEVERAL AREAS BETWEEN 30-40 MPH.

ONE RECORD WAS SET DURING THE MONTH AT THE LEWISTON AIRPORT WITH
0.49 INCHES BREAKING A DAILY PRECIPITATION RECORD ON THE 17TH.



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