Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 020156 CCA
CLMLWS

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPOKANE, WA
459 AM PDT MON OCT 1 2018

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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             108   09/06/1944
 LOW               27   09/24/1926
HIGHEST            92   09/07        MM      MM      100  09/02
                        09/06
LOWEST             42   09/19        MM      MM       37  09/22
AVG. MAXIMUM     77.6              78.2    -0.6     78.7
AVG. MINIMUM     49.6              51.0    -1.4     53.8
MEAN             63.6              64.6    -1.0     66.2
DAYS MAX >= 90      2               3.9    -1.9        6
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.1    -0.1        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.37   1940
 MINIMUM            T   2012
                        1999
TOTALS           0.04              0.67   -0.63     0.56
DAILY AVG.       0.00              0.02   -0.02     0.02
DAYS >= .01         1               4.9    -3.9        6
DAYS >= .10         0               2.3    -2.3        2
DAYS >= .50         0               0.2    -0.2        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.04   09/13 TO 09/13              0.29

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   1926
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0      0.0
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   09/30 TO 09/30               0.0

DEGREE_DAYS
HEATING TOTAL      81                99     -18       95
 SINCE 7/1         91               114     -23       95
COOLING TOTAL      46                87     -41      141
 SINCE 1/1        934               804     130     1160
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.1
HIGHEST WIND SPEED/DIRECTION    26/300    DATE  09/10
HIGHEST GUST SPEED/DIRECTION    34/280    DATE  09/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     46

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

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

$$

SEPTEMBER 2018 FINISHED DRY AND SLIGHTLY COOLER THAN NORMAL OVER
SOUTHEAST WASHINGTON INTO THE SOUTH IDAHO PANHANDLE. FOR LEWISTON IT
TIED FOR THE 5TH DRIEST SEPTEMBER WHERE ONLY .04 INCHES FELL. ONLY
ONE NOTEWORTHY EVENT DURING THE MONTH TO TALK ABOUT WHICH OCCURRED
LATE ON THE 7TH AND EARLY ON THE 8TH. A STRONG COLD FRONT PASSAGE
OCCURRED WITH WINDS ENHANCED BY CONVECTION IN THE COLUMBIA BASIN.
PEAK WIND GUSTS INCLUDE 43 MPH CORRAL CREEK, 36 MPH UNIONTOWN, AND
34 MPH IN LEWISTON. BLOWING DUST REDUCED VISIBILITY BRIEFLY TO 1/16
OF A MILE IN RITZVILLE WITH 4 MILES REPORTED IN PULLMAN.

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



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