Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000 CXUS51 KBUF 011924 CLMROC CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 1226 PM EDT TUE SEP 1 2015 ................................... ...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2015 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 89 08/17 87 08/30 08/26 LOWEST 50 08/28 50 08/29 08/19 AVG. MAXIMUM 79.1 79.1 0.0 77.8 AVG. MINIMUM 59.9 59.5 0.4 58.6 MEAN 69.5 69.3 0.2 68.2 DAYS MAX >= 90 0 1.4 -1.4 0 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 4.67 3.47 1.20 2.27 DAYS >= .01 9 10 DAYS >= .10 4 7 DAYS >= .50 2 1 DAYS >= 1.00 2 0 GREATEST 24 HR. TOTAL 2.38 08/10 TO 08/10 SNOWFALL (INCHES) RECORDS TOTAL MM MM TOTALS 0.0 0.0 0.0 0.0 SINCE 7/1 0.0 0.0 0.0 0.0 SNOWDEPTH AVG. 0 MM MM 0 DAYS >= 1.0 0 0.0 0.0 0 GREATEST SNOW DEPTH 0 MM 0 MM 24 HR TOTAL 0.0 DEGREE_DAYS HEATING TOTAL 8 22 -14 18 SINCE 7/1 19 34 -15 25 COOLING TOTAL 157 155 2 125 SINCE 1/1 554 484 70 464 .................................................. WIND (MPH) AVERAGE WIND SPEED 7.1 HIGHEST WIND SPEED/DIRECTION 31/280 DATE 08/20 HIGHEST GUST SPEED/DIRECTION 35/270 DATE 08/20 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.60 NUMBER OF DAYS FAIR 4 NUMBER OF DAYS PC 22 NUMBER OF DAYS CLOUDY 5 AVERAGE RH (PERCENT) 71 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 5 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 1 LIGHT RAIN 10 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 1 HAZE 0 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...COMFORTABLE MONTH OF AUGUST... AUGUST TEMPERATURES STARTED OUT ON THE NEAR NORMAL TO COOLER THAN NORMAL SIDE...UNTIL A WEEK LONG STRETCH OF ABOVE NORMAL TEMPERATURES THAT BEGAN IN THE MIDDLE OF THE MONTH. FROM THE 21ST THROUGH THE 29TH ALL BUT ONE OF THE NINE DAYS REACHED TEMPERATURES THAT WERE ONLY NORMAL OR BELOW NORMAL DURING THIS STRETCH. THE MONTH ENDED ON A WARM NOTE WITH THE 30TH AND 31ST REACHING ABOVE NORMAL TEMPERATURES. RAINFALL AMOUNTS WERE BELOW NORMAL THROUGH THE FIRST THIRD OF THE MONTH...UNTIL THE ROCHESTER METRO AREA AND MANY OF THE SURROUNDING SUBURBAN AREAS GOT INUNDATED BY ONE TO FOUR INCHES OF RAINFALL DURING THE AFTERNOON AND EVENING ON AUGUST 10TH. ANOTHER BOUT OF HEAVY RAINFALL OCCURRED ON THE 20TH AS A COLD FRONT MOVED THROUGH THE AREA RESULTING IN ONE TO TWO INCHES OF RAINFALL IN A SHORT AMOUNT OF TIME...RESULTING IN SOME FLOODING AROUND THE ROCHESTER AREA. THE AVERAGE TEMPERATURE FOR AUGUST WAS 69.5 DEGREES WHICH IS JUST TWO TENTHS OF A DEGREE ABOVE NORMAL. THE LONGEST STRETCH OF ABOVE OR BELOW NORMAL TEMPERATURES WAS SEVEN DAYS. IN TOTAL THERE WERE 14 DAYS ABOVE NORMAL AND 15 DAYS BELOW NORMAL. THE WARMEST DAY THIS MONTH WAS THE 17TH WHEN THE TEMPERATURE REACHED 89 DEGREES. OTHER THAN THIS TEMPERATURE READING...THE MONTH GENERALLY FINISHED NEAR NORMAL WITH 22 OF 31 DAYS HAVING TEMPERATURES WITHIN FIVE DEGREES OF NORMAL. THERE WERE 12 DAYS THAT REACHED 80F OR GREATER...WHICH IS TWO LESS THAN NORMAL. PRECIPITATION FINISHED ABOVE NORMAL FOR THE MONTH WITH 4.67 INCHES OF RAINFALL...WHICH IS 1.20 INCHES ABOVE NORMAL. 90 PERCENT OF THE RAINFALL AT THE ROCHESTER AIRPORT FOR THE MONTH FELL ON THE 10TH AND 20TH...THE ROCHESTER AIRPORT RECEIVED 2.38 INCHES OF RAIN FOR THE DAY ON AUGUST 10TH...AND 1.93 INCHES OF RAIN ON THE 20TH...WITH A TOTAL OF 4.31 INCHES OF RAINFALL FOR THE TWO DAYS. THE MONTH FINISHED WITH NINE DAYS OF MEASURABLE RAINFALL...TWO DAYS WITH GREATER THAN ONE QUARTER OF AN INCH AND TWO DAYS WITH GREATER THAN A HALF OF AN INCH. AUGUST STARTED OUT DRY FOR THE MOST PART...WITH ONLY 13 HUNDREDTHS OF AN INCH OF RAINFALL THROUGH AUGUST 9TH AT THE ROCHESTER AIRPORT. A COLD FRONT MOVED THROUGH WESTERN NEW YORK DURING THE LATE EVENING AND EARLY MORNING OF AUGUST 3RD AND 4TH RESPECTIVELY WITH A TENTH OF AN INCH OF RAINFALL FOR THE DAY ON AUGUST 4TH. THE NEXT FIVE DAYS FEATURED ONLY A TRACE OF RAINFALL AND BELOW NORMAL TEMPERATURES. RAIN RETURNED ON AUGUST 10TH...WITH ACCUMULATIONS RANGING FROM ONE TO FOUR INCHES ACROSS THE ROCHESTER METRO AREA AND SURROUNDING SUBURBS...AS AN AREA OF LOW PRESSURE AND ASSOCIATED FRONTAL SYSTEM MOVED THROUGH THE AREA DURING THE EVENING. SOME FLASH FLOODING OCCURRED IN WAYNE COUNTY DURING THE AFTERNOON OF AUGUST 10TH AS A RESULT OF THE HEAVY RAINFALL. DURING THE AFTERNOON AND EVENING ON AUGUST 14TH AND EARLY MORNING OF AUGUST 15TH SHOWERS AND THUNDERSTORMS FORMED ALONG A SHORTWAVE TROUGH AND ASSOCIATED FRONTAL BOUNDARY OVER WESTERN NEW YORK...24 HOUR RAINFALL AMOUNTS OF A HALF INCH OR LESS WERE COMMON IN MONROE COUNTY...WITH A FEW ISOLATED TWO INCH AMOUNTS IN NORTHWESTERN MONROE COUNTY. WARMER AND MORE HUMID AIR FOLLOWED FOR THE FOLLOWING DAYS WITH THE TEMPERATURE REACHING 89 DEGREES ON THE 17TH. A STRONG COLD FRONT MOVED THROUGH WESTERN NEW YORK ON AUGUST 20TH...AS A RESULT...HEAVY RAINFALL ACCUMULATED TO 1.93 INCHES AT THE ROCHESTER AIRPORT...FLASH FLOODING WAS REPORTED IN THE ROCHESTER METRO AREA AND SOME OF THE SURROUNDING SUBURBS. ANOTHER COOLER AND MOSTLY DRY PERIOD FOLLOWED FROM AUGUST 21ST THROUGH THE 29TH...WITH ONLY A HUNDREDTH OF AN INCH OF RAINFALL AT THE ROCHESTER AIRPORT AND NORMAL OR BELOW NORMAL TEMPERATURES FOR EIGHT OUT OF THE NINE DAYS DURING THIS TIME PERIOD. THE LAST TWO DAYS OF THE MONTH RECEIVED WARMER THAN NORMAL TEMPERATURES WITH NO RAINFALL. WINDS WERE ABOVE NORMAL THIS MONTH...AVERAGING 7.1 MPH WHICH IS JUST 0.1 MPH ABOVE NORMAL. THE STRONGEST WIND GUST OF 35 MPH CAME ON THE 20TH BEHIND A COLD FRONT. LAKE ONTARIO STARTED OUT AT 74 DEGREES AT THE BEGINNING OF THE MONTH...PEAKING AT 75 DEGREES BETWEEN AUGUST 3RD AND 6TH. THE LAKE DROPPED TO ITS COOLEST TEMPERATURE OF 47 DEGREES ON AUGUST 10TH AND 11TH...WHEN UPWELLING WAS STRONGEST. IN ALL A MOSTLY DRY MONTH...THAT ENDED UP WITH ABOVE NORMAL RAINFALL DUE TO A FEW WET DAYS OF HEAVY RAIN. && WELCH $$

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