Climatological Report (Monthly)
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
921
CXUS46 KOTX 011412
CLMLWS
CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
706 AM PDT WED MAY 01 2024
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...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 98 04/28/1939
LOW 20 04/19/1966
HIGHEST 76 04/02 MM MM 89 04/29
04/13
LOWEST 33 04/18 MM MM 29 04/05
04/19
AVG. MAXIMUM 63.9 62.3 1.6 62.6
AVG. MINIMUM 41.4 40.7 0.7 39.9
MEAN 52.6 51.5 1.1 51.3
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 2.4 -2.4 4
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.29 1978
MINIMUM 0.05 2021
TOTALS 1.30 1.44 -0.14 1.03
DAILY AVG. 0.04 0.05 -0.01 0.03
DAYS >= .01 13 11.3 1.7 11
DAYS >= .10 6 4.5 1.5 4
DAYS >= .50 0 0.3 -0.3 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.57 04/04 TO 04/05 0.25
SNOWFALL (INCHES)
RECORDS
TOTAL 1.1 1972
TOTALS T 0.0 0.0 T
SINCE 7/1 13.3 12.7 0.6 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL MM MM
DEGREE DAYS
HEATING TOTAL 365 407 -42 417
SINCE 7/1 4366 4732 -366 MM
COOLING TOTAL 0 2 -2 11
SINCE 1/1 0 2 -2 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.2
HIGHEST WIND SPEED/DIRECTION 28/290 DATE 04/21
APRIL 2024 BROUGHT WARMER THAN NORMAL TEMPERATURES AND BELOW
NORMAL PRECIPITATION FOR THE MAJORITY OF SOUTHEAST WASHINGTON INTO
THE SOUTH IDAHO PANHANDLE. THE FIRST PART OF THE MONTH BROUGHT SOME
SIGNIFICANT CHANGES IN THE WEATHER. HIGH TEMPERATURES ON THE 2ND
REACHED THE MID 70S IN LEWISTON WHICH HELPED FUEL A CLUSTER OF
SHOWERS AND THUNDERSTORMS WHICH TRACKED FROM POMEROY AND UNIONTOWN
NORTHEAST TOWARDS LOOKOUT PASS. THEN A MAJOR CHANGE TO WINTER HIT
SOME AREAS ON THE 5TH WITH MORNING SNOW AS A COLD LOW PRESSURE
SYSTEM MOVED OVER THE REGION. RAIN CHANGED TO SNOW WITH SIGNIFICANT
ACCUMULATIONS ABOVE THE LEWISTON-CLARKSTON VALLEY. SNOW
ACCUMULATIONS INCLUDE 9 INCHES IN ANATONE, 4.5 INCHES 2 MILES NORTH
OF MOSCOW, 4 INCHES NEAR VIOLA, AND 3 INCHES IN POTLATCH, PALOUSE,
AND PULLMAN. A TRACE FELL IN LEWISTON WHICH TIED A RECORD FOR THE
DATE. A COOP OBSERVER 14 MILES SOUTHWEST OF ANATONE MEASURED 8.5
INCHES, MAKING IT THE HIGHEST DAILY SNOW TOTAL FOR THE MONTH OF
APRIL. TEMPERATURES THEN REBOUNDED HEADING INTO THE MIDDLE OF THE
MONTH, WITH HIGH TEMPERATURES CLIMBING BACK UP INTO THE 70S ON THE
13TH AND 14TH. THE WARMTH FUELED ENERGY FOR A SLOW MOVING
THUNDERSTORM OVER KAMIAH ON THE 14TH. HEAVY RAIN LED TO DEBRIS FLOWS
AND MUD SLIDES WITH TEMPORARY ROAD CLOSURES ON HIGHWAYS 12, 64, AND
162. RAIN GAUGES IN THE AREA REPORTED 1.90-2.50 INCHES OF RAIN IN 3
HOURS. THE SECOND HALF OF THE MONTH SEVERAL COLD FRONTS DELIVERED
BREEZY TO WINDY CONDITIONS AND OCCASIONAL LIGHT PRECIPITATION. WIND
GUSTS ON SEVERAL DAYS PEAKED IN THE 25-35 MPH RANGE AT THE PULLMAN
AIRPORT, EXCEPT ON THE 21ST WITH A PEAK GUST OF 45 MPH.
28/280 04/29 HIGHEST GUST SPEED/DIRECTION
40/300 DATE 04/20
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.41
NUMBER OF DAYS FAIR 15
NUMBER OF DAYS PC 10
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 SLEET 0
FOG 5 FOG W/VIS <= 1/4 MILE 0
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
APRIL 2024 BROUGHT WARMER THAN NORMAL TEMPERATURES AND BELOW
NORMAL PRECIPITATION FOR THE MAJORITY OF SOUTHEAST WASHINGTON INTO
THE SOUTH IDAHO PANHANDLE. THE FIRST PART OF THE MONTH BROUGHT SOME
SIGNIFICANT CHANGES IN THE WEATHER. HIGH TEMPERATURES ON THE 2ND
REACHED THE MID 70S IN LEWISTON WHICH HELPED FUEL A CLUSTER OF
SHOWERS AND THUNDERSTORMS WHICH TRACKED FROM POMEROY AND UNIONTOWN
NORTHEAST TOWARDS LOOKOUT PASS. THEN A MAJOR CHANGE TO WINTER HIT
SOME AREAS ON THE 5TH WITH MORNING SNOW AS A COLD LOW PRESSURE
SYSTEM MOVED OVER THE REGION. RAIN CHANGED TO SNOW WITH SIGNIFICANT
ACCUMULATIONS ABOVE THE LEWISTON-CLARKSTON VALLEY. SNOW
ACCUMULATIONS INCLUDE 9 INCHES IN ANATONE, 4.5 INCHES 2 MILES NORTH
OF MOSCOW, 4 INCHES NEAR VIOLA, AND 3 INCHES IN POTLATCH, PALOUSE,
AND PULLMAN. A TRACE FELL IN LEWISTON WHICH TIED A RECORD FOR THE
DATE. A COOP OBSERVER 14 MILES SOUTHWEST OF ANATONE MEASURED 8.5
INCHES, MAKING IT THE HIGHEST DAILY SNOW TOTAL FOR THE MONTH OF
APRIL. TEMPERATURES THEN REBOUNDED HEADING INTO THE MIDDLE OF THE
MONTH, WITH HIGH TEMPERATURES CLIMBING BACK UP INTO THE 70S ON THE
13TH AND 14TH. THE WARMTH FUELED ENERGY FOR A SLOW MOVING
THUNDERSTORM OVER KAMIAH ON THE 14TH. HEAVY RAIN LED TO DEBRIS FLOWS
AND MUD SLIDES WITH TEMPORARY ROAD CLOSURES ON HIGHWAYS 12, 64, AND
162. RAIN GAUGES IN THE AREA REPORTED 1.90-2.50 INCHES OF RAIN IN 3
HOURS. THE SECOND HALF OF THE MONTH SEVERAL COLD FRONTS DELIVERED
BREEZY TO WINDY CONDITIONS AND OCCASIONAL LIGHT PRECIPITATION. WIND
GUSTS ON SEVERAL DAYS PEAKED IN THE 25-35 MPH RANGE AT THE PULLMAN
AIRPORT, EXCEPT ON THE 21ST WITH A PEAK GUST OF 45 MPH.