Climatological Report (Monthly)
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
000 CXUS56 KEKA 031244 CLMEKA SFOCLMEKA 000 TTAA00 EKA 031231 CLIMATE REPORT NATIONAL WEATHER SERVICE EUREKA CA 527 AM PDT TUE OCT 03 2023 ................................... ...THE EUREKA CA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1886 TO 2023 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 87 09/02/2017 LOW 36 09/22/1895 HIGHEST 70 09/02 MM MM 70 LOWEST 44 09/21 MM MM 49 AVG. MAXIMUM 65.1 63.9 1.2 65.4 AVG. MINIMUM 52.2 50.5 1.7 52.1 MEAN 58.6 57.2 1.4 58.8 DAYS MAX >= 90 0 DAYS MIN <= 32 0 PRECIPITATION (INCHES) RECORD MAXIMUM 4.26 1901 MINIMUM 0.00 1929 TOTALS 1.83 0.68 1.15 DAYS >= .01 6 4.7 1.3 4 DAYS >= .10 1 1.6 -0.6 1 DAYS >= .50 1 0.2 0.8 0 DAYS >= 1.00 1 0.1 0.9 0 GREATEST 24 HR. TOTAL 1.68 09/25 TO 09/26 LIQUID 7/1 MM MM DEGREE DAYS HEATING TOTAL 182 234 -52 179 SINCE 7/1 501 661 -160 MM COOLING TOTAL 0 0 0 0 SINCE 1/1 0 1 -1 MM .............................................................. WIND (MPH) AVERAGE WIND SPEED 3.5 HIGHEST WIND SPEED/DIRECTION 18/160 DATE 09/25 HIGHEST GUST SPEED/DIRECTION 23/MM DATE 09/20 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.56 NUMBER OF DAYS FAIR 10 NUMBER OF DAYS PC 10 NUMBER OF DAYS CLOUDY 10 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 HEAVY RAIN 1 RAIN 0 LIGHT RAIN 8 HAIL 0 SLEET 0 FOG 16 FOG W/VIS <= 1/4 MILE 3 HAZE 7 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. FOLLOWING THE TREND FROM AUGUST, THE FIRST HALF OF SEPTEMBER WAS VERY TYPICAL FOR THE COAST. MOST DAYS WERE MARKED BY A PRONOUNCED MARINE LAYER IN THE MORNING CLEARING IN THE AFTERNOON. AS SUCH THE EARLY PART OF THE MONTH SAW CALM CONDITIONS WITH COOL TEMPERATURES IN THE MID 60S. A FEW DAYS OF OFFSHORE WIND AROUND SEPTEMBER 20TH ALLOWED FOR A COUPLE DAYS NEAR 70 AND ALSO BROUGHT SMOKE FORM INLAND WILDFIRES, GENERATING PERIODS OF BRIEFLY UNHEALTHY AIR QUALITY. SUCH SMOKE IS UNUSUAL FOR THE USUALLY PROTECTED COAST. THE MONTH ENDED WITH A BANG AS AN ABNORMALLY STRONG EARLY SEASON ATMOSPHERIC RIVER MADE LANDFALL ON THE 25TH INTO THE 26TH. THIS EVENT BROUGHT GUSTY WINDS AND HEAVY RAINFALL MUCH MORE TYPICAL OF NOVEMBER OR DECEMBER. WITH STORM TOTAL RAINFALL OF 1.63 THIS ONE EVENT PUSHED THE MONTH WELL ABOVE AVERAGE FOR PRECIPITATION. THE MONTH CLOSED WITH A SERIES OF SUBSEQUENT WEAK FRONTS BRINGING FURTHER DRIZZLE AND LIGHT RAIN. $$