Climatological Report (Monthly)
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
842
CXUS46 KOTX 010854
CLMLWS
CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
137 AM PDT TUE OCT 01 2024
...................................
...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF
SEPTEMBER 2024...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1881 TO 2024
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 100 09/01 MM MM 97 09/16
09/07
LOWEST 41 09/30 MM MM 46 09/20
09/29
AVG. MAXIMUM 83.0 79.5 3.5 78.5
AVG. MINIMUM 57.0 52.3 4.7 54.2
MEAN 70.0 65.9 4.1 66.4
DAYS MAX >= 90 9 4.4 4.6 6
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 4.37 1940
MINIMUM T 2012
TOTALS 0.82 0.60 0.22 1.04
DAILY AVG. 0.03 0.02 0.01 0.03
DAYS >= .01 5 4.7 0.3 10
DAYS >= .10 2 1.8 0.2 4
DAYS >= .50 0 0.2 -0.2 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.59 09/11 TO 09/12 0.49
SNOWFALL (INCHES)
RECORDS
TOTAL T 1926
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 0.0 0.0 MM
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL MM MM
DEGREE DAYS
HEATING TOTAL 25 76 -51 82
SINCE 7/1 27 88 -61 MM
COOLING TOTAL 184 102 82 128
SINCE 1/1 1228 908 320 MM
................................................................
WIND (MPH)
AVERAGE WIND SPEED 4.6
HIGHEST WIND SPEED/DIRECTION 36/270 DATE 09/25
HIGHEST GUST SPEED/DIRECTION 55/260 DATE 09/25
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.17
NUMBER OF DAYS FAIR 27
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 41
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 FOG W/VIS <= 1/4 MILE 0
HAZE 8
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
SEPTEMBER 2024 BROUGHT WARMER AND WETTER THAN NORMAL CONDITIONS TO
SOUTHEAST WASHINGTON INTO THE SOUTH IDAHO PANHANDLE. THE MONTH
STARTED OFF VERY WARM WITH HIGH TEMPERATURES MOST DAYS THROUGH THE
9TH INTO THE 90S IN LEWISTON WITH 100F REACHED ON THE 1ST AND 7TH.
ON THE 11TH AND 12TH A DEEP LOW PRESSURE SYSTEM TRACKED INTO THE
REGION PRODUCING HEAVY RAIN. RAIN TOTALS INCLUDE 2.27" ST MARIES,
1.72" POTLATCH, 1.36" LENORE, 1.20" GARFIELD, 1.13" PULLMAN AIRPORT,
0.79" LEWISTON AIRPORT. EVEN MORE FELL IN THE CENTRAL PANHANDLE
MOUNTAINS WITH 2.70" AT LINES CREEK, AND 2.51" IN NUCKOLS. ONE
STATION JUST NORTH OF KELLOGG MEASURED 3.02". THE 25TH BROUGHT A
STRONG COLD FRONT PASSAGE DELIVERED HIGH WINDS, SIGNIFICANT AMOUNTS
OF BLOWING DUST, AND SEVERE THUNDERSTORMS. SEVERE THUNDERSTORMS
PRODUCED WIND GUSTS AROUND 65 MPH IN PULLMAN, WITH DOWNED TREES IN
PULLMAN AND CLARKSTON. THE STRONG WINDS RESULTED IN SEVERAL POWER
OUTAGES. IN ADDITION, THE WINDS PICKED UP SIGNIFICANT AMOUNTS OF
BLOWING DUST AS A HABOOB TRACKED FROM DUSTY THROUGH THE COLFAX,
PULLMAN, AND MOSCOW AREAS. ANOTHER COLD FRONT ON THE 29TH PRODUCED
WEST WINDS GUSTING BETWEEN 40 AND 45 MPH WHICH CREATED ANOTHER DUST
STORM WITH VISIBILITY REDUCTIONS OF A HALF MILE OR LESS TO
RITZVILLE, LIND, OAKESDALE, STEPTOE, AND THE COMMUNITY OF PALOUSE.
NO RECORDS WERE SET DURING THE MONTH AT THE LEWISTON AIRPORT.