CXUS46 KOTX 011412 CLMLWS CLIMATE REPORT NATIONAL WEATHER SERVICE SPOKANE WA 706 AM PDT WED MAY 01 2024 ................................... ...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 ................................................................ 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.