Climatological Report (Monthly)
Issued by NWS Buffalo, NY
Issued by NWS Buffalo, NY
000 CXUS51 KBUF 051326 CLMROC CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 826 AM EDT FRI SEP 01 2023 ................................... ...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1871 TO 2023 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 99 08/28/1948 08/26/1948 LOW 36 08/30/1965 HIGHEST 85 08/07 93 08/07 LOWEST 51 08/28 50 08/13 08/31 AVG. MAXIMUM 77.2 80.5 -3.3 83.1 AVG. MINIMUM 60.0 61.0 -1.0 62.0 MEAN 68.6 70.7 -2.1 72.5 DAYS MAX >= 90 0 1.9 -1.9 4 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 7.26 1886 MINIMUM 0.36 1876 TOTALS 5.44 3.31 2.13 3.37 DAYS >= .01 11 11 DAYS >= .10 6 6 DAYS >= .50 3 3 DAYS >= 1.00 3 1 GREATEST 24 HR. TOTAL 3.17 08/15 TO 08/16 1.18 08/22 TO 08/23 SNOWFALL (INCHES) RECORDS TOTAL MM MM 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 0 DAYS >= 0.1 0 0 GREATEST SNOW DEPTH 0 0 MM 24 HR TOTAL MM MM DEGREE DAYS HEATING TOTAL 7 12 -5 0 SINCE 7/1 7 13 -6 MM COOLING TOTAL 125 190 -65 245 SINCE 1/1 454 596 -142 MM ................................................................ WIND (MPH) AVERAGE WIND SPEED 7.2 HIGHEST WIND SPEED/DIRECTION 29/260 HIGHEST GUST SPEED/DIRECTION 41/190 DATE 08/07 41/270 08/18 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.68 NUMBER OF DAYS FAIR 2 NUMBER OF DAYS PC 16 NUMBER OF DAYS CLOUDY 13 AVERAGE RH (PERCENT) 74 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 5 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 4 LIGHT RAIN 15 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 11 FOG W/VIS <= 1/4 MILE 0 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ... COOL AND WET AUGUST ... IT`S BEEN SEVERAL SUMMERS SINCE WE`VE HAD A COOLER THAN NORMAL AUGUST ACROSS WESTERN NEW YORK, WITH THIS YEAR THE FIRST SINCE 2017 FEATURING BELOW NORMAL WARMTH. IT WAS A WET MONTH, WITH STORMS LATE ON THE 15TH AND INTO THE EARLY MORNING HOURS OF THE 16TH PRODUCING MORE THAN HALF OF THE MONTH`S RAINFALL AND HELPING AUGUST AS A WHOLE TO FINISH 12TH WETTEST. THE TEMPERATURE AVERAGED 68.6F THIS MONTH, WHICH IS 2.1F DEGREES BELOW NORMAL. THIS IS THE COOLEST AUGUST SINCE 2017, WHICH ALSO FINISHED WITH THE SAME AVERAGE TEMPERATURE. DAYS IN THE 80S WERE LACKING THIS MONTH WITH JUST 1 DAY TOPPING THE 85F MARK. ONLY THE YEAR 1912 FAILED TO REACH AT LEAST 85F DURING THE MONTH OF AUGUST. THERE WERE 19 DAYS BELOW NORMAL FOR THE MONTH, WHILE JUST 9 DAYS FEATURED ABOVE NORMAL TEMPERATURES. EVEN OF THESE 9 DAYS, THE GREATEST DEPARTURE WAS JUST 5 DEGREES FROM NORMAL, THIS BEING ON THE 7TH. THE WARMEST TEMPERATURE WAS JUST 85F THIS MONTH.  PRECIPITATION FOR THE MONTH WAS WELL ABOVE NORMAL, FINISHING MORE THAN TWO-INCHES ABOVE THE NORMAL OF 3.31 INCHES. THE BULK OF THIS PRECIPITATION TOTAL CAME DURING THE 15TH THROUGH THE 16TH. THUNDERSTORMS, SLOWLY MOVING, DROPPED NEARLY AN INCH OF RAIN DURING THE AFTERNOON AND EVENING HOURS OF THE 15TH, AND THEN MORE THAN TWO INCHES OF RAIN BEFORE DAWN ON THE 16TH, INCLUDING 1.09 INCHES OF RAIN BETWEEN 4 AND 5 AM AT THE AIRPORT. FOR THE FIRST TIME IN AUGUST, THERE WERE THREE DAYS THAT RECORDED AT LEAST AN INCH OF RAINFALL, THESE BEING THE 15TH, 16TH AND 24TH. THOUGH A WET MONTH THE 11 DAYS WITH MEASURABLE PRECIPITATION IS JUST ONE DAY MORE THAN THE NORMAL OF 10.    FOR THE MONTH OF AUGUST AN ANOMALOUS STRONG MID LEVEL RIDGE OF HIGH PRESSURE SCORCHED THE SOUTHERN PLAINS, WHILE LOWER HEIGHT ANOMALIES LAID ACROSS THE NORTHEAST. THIS PATTERN KEPT PLENTY OF COMFORTABLE SUMMER DAYS ACROSS WESTERN NEW YORK, WITH SEVERAL DAYS BEHIND COLD FRONTS BORDERING THE LINE OF TOO COOL FOR SUMMER. THE FIRST ACTIVE PERIOD OF WEATHER WAS THE 6TH AND 7TH OF THE MONTH. A WARM FRONT BROUGHT SCATTERED RAIN SHOWERS TO THE GENESEE VALLEY LATE ON THE 6TH, WHILE AN UNSTABLE ATMOSPHERE BREWED THUNDERSTORMS ON THE 7TH DURING THE AFTERNOON. WHILE THESE STORMS WERE BELOW SEVERE LIMITS ACROSS WESTERN NEW YORK, TO THE EAST AN EF3 TORNADO RIPPED THROUGH SOUTHERN LEWIS COUNTY. ON THE 15TH SHOWERS AND THUNDERSTORMS BLOSSOMED DURING THE AFTERNOON AND EVENING HOURS ACROSS THE GENESEE VALLEY. THIS PRIMED THE AREA FOR POTENTIAL FLOODING AS ADDITIONAL STORMS AND DELUGES OF RAIN EARLY ON THE 16TH CLOSED SEVERAL STREETS ACROSS THE METRO AREA AND MADE FOR A SLOW COMMUTE INTO WORK WITH SEVERAL MAJOR ROUTES FEATURING DEEP PONDING WATER. A COLD FRONT ON THE 17TH BROUGHT SCATTERED SHOWERS AND THUNDERSTORMS TO THE ROCHESTER METRO AREA ON THE 17TH, WITH AN UPPER LEVEL LOW LINGERING SHOWERS, AND EVEN SOME LAKE EFFECT RAIN AROUND THE REGION ON THE 18TH. LATE ON THE 24TH A LINE OF SHOWERS AND STRONG THUNDERSTORMS DROPPED SOUTHEASTWARD ACROSS WESTERN NEW YORK. ROCHESTER PICKED UP ITS THIRD CALENDAR DAY WITH AT LEAST AN INCH OF PRECIPITATION WITHIN THIS ACTIVITY. FINALLY A COLD FRONT ON THE 30TH BROUGHT EARLY MORNING RAIN SHOWERS TO ROCHESTER, AND LEFT A CHILLY DAY IN THE 60S, AND OVERNIGHT LOWS IN THE LOWER 50S BEHIND IT. THE WINDS WERE SLIGHTLY ABOVE NORMAL FOR THE MONTH, AVERAGING 0.2 MILES PER HOUR ABOVE THE NORMAL OF 7.0 MPH THE STRONGEST WIND GUSTS OCCURRED IN THUNDERSTORMS, THIS AT 41 MPH ON THE 18TH. IN ALL A COOL, WET MONTH LACKING MUCH SEVERE STORMS. && THOMAS                                                              $$