Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000 CXUS51 KBUF 052153 CLMBUF CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 1253 PM EDT SUN OCT 1 2017 ................................... ...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2017 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 98 09/03/1953 LOW 32 09/30/1991 09/24/1963 09/28/1957 HIGHEST 91 09/25 88 09/10 LOWEST 42 09/30 43 09/25 AVG. MAXIMUM 75.3 71.1 4.2 76.3 AVG. MINIMUM 55.5 53.4 2.1 57.6 MEAN 65.4 62.2 3.2 67.0 DAYS MAX >= 90 2 0.1 1.9 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 8.99 1977 MINIMUM 0.31 1897 TOTALS 3.17 3.90 -0.73 3.53 DAYS >= .01 9 7 DAYS >= .10 6 4 DAYS >= .50 3 2 DAYS >= 1.00 1 1 GREATEST 24 HR. TOTAL 1.07 09/07 TO 09/07 09/17 TO 09/17 09/30 TO 09/30 09/30 TO 09/30 SNOWFALL (INCHES) RECORDS TOTAL T 1956 1950 TOTALS 0.0 0.0 0.0 0.0 SINCE 7/1 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 09/30 TO 09/30 DEGREE_DAYS HEATING TOTAL 93 135 -42 44 SINCE 7/1 109 162 -53 44 COOLING TOTAL 116 53 63 109 SINCE 1/1 586 540 46 927 ................................................. WIND (MPH) AVERAGE WIND SPEED 6.6 HIGHEST WIND SPEED/DIRECTION 31/220 HIGHEST GUST SPEED/DIRECTION 41/220 DATE 09/04 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM NUMBER OF DAYS FAIR 9 NUMBER OF DAYS PC 15 NUMBER OF DAYS CLOUDY 6 AVERAGE RH (PERCENT) 72 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 4 LIGHT RAIN 7 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 9 FOG W/VIS <= 1/4 MILE 0 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...TWO HALVES OF SEPTEMBER... SEPTEMBER FEATURED A COOL AND WET START TO THE MONTH, FOLLOWED BY A DRY AND EVENTUALLY HOT FINISH TO THE MONTH. A HEAT WAVE THE LAST WEEK OF THE MONTH FEATURED THE LATEST CONSECUTIVE DAYS REACHING 90F. THE TEMPERATURE FOR THE MONTH AVERAGED 65.4F WHICH IS 3.2 DEGREES ABOVE NORMAL. HOWEVER THE MONTH CAN BE BROKEN DOWN INTO TWO DISTINCT WEATHER REGIMES...A COOL FIRST 11 DAYS, AND A VERY WARM REMAINING 19 DAYS OF THE MONTH. THE FIRST 11 DAYS AVERAGED 59.8F, WHILE THE LAST 19 DAYS AVERAGED ABOUT 10 DEGREES WARMER AT 69.2F. THERE WERE 4 RECORDS ESTABLISHED, INCLUDING THE FIRST RECORD LOW TEMPERATURE SINCE MARCH OF 2015. RECORDS INCLUDE A RECORD LOW OF 43F/2ND, AND RECORD HIGHS OF 90F/24TH, 91F/25TH AND 88F/26TH. THE THREE RECORD HIGHS WERE THE FIRST THREE CONSECUTIVE RECORD HIGHS SINCE MARCH OF 2012 WHEN THERE WERE 6 CONSECUTIVE RECORD HIGHS (17TH - 22ND). THE 12 CONSECUTIVE DAYS AT 80F OR GREATER (16TH - 27TH) WAS THE LATEST CONSECUTIVE STRETCH OF THIS MANY DAYS THIS LATE IN THE SUMMER SEASON. THE 15 DAYS OF 80F OR GREATER TEMPERATURES IS THIRD GREATEST FOR THE MONTH OF SEPTEMBER. PRECIPITATION TOTALED 3.17 INCHES THIS MONTH, WHICH IS ABOUT THREE QUARTERS OF AN INCH BELOW NORMAL. THE BULK OF THIS PRECIPITATION OCCURRED THE FIRST WEEK, INCLUDING THIS MONTHS GREATEST DAILY RAINFALL TOTAL OF 1.07 INCHES ON THE 7TH IN PRIMARILY LAKE EFFECT RAIN BANDS. THE STRETCH OF 18 CONSECUTIVE DAYS WITHOUT MEASURABLE RAINFALL (9TH TO 26TH) WAS TIED FOR THE 15TH LONGEST, AND WAS THE SECOND LONGEST STRETCH ENTIRELY IN THE MONTH OF SEPTEMBER (19 DAYS/1917). HIGH PRESSURE STARTED THE MONTH WITH FAIR WEATHER ACROSS WESTERN NEW YORK. THE REMNANTS OF HURRICANE HARVEY PASSED BY THE REGION ON THE 2ND AND 3RD WITH MINOR RAINFALL AMOUNTS. FOLLOWING ONE MILD AFTERNOON ON THE 4TH, A LINE OF THUNDERSTORMS CROSSED THE REGION THAT EVENING, WITH STRONG WINDS FELLING TREES ACROSS THE SOUTHERN TIER AND TOWARDS THE FINGER LAKES REGION. COOLER AIR THEN SETTLED INTO WESTERN NEW YORK FROM THE 5TH THROUGH THE 11TH. A DISTINCT PATTERN CHANGE THEN OCCURRED MID-MONTH, WITH TEMPERATURES SOARING TO 80F ON THE 12TH. RAIN FROM HURRICANE IRMA REMAINED JUST SOUTH AND EAST OF THE REGION ON THE 12TH AND 13TH, ALLOWING FOR A PROLONGED STRETCH OF DRY WEATHER. THE DRY GROUND, COUPLED WITH HEAT BROUGHT NORTHWARD FROM TROPICAL ACTIVITY BUILT A STRONG HIGH PRESSURE OVER THE EASTERN US, SUCH THAT AIR TEMPERATURES REACHED 90F ON THE 24TH AND 25TH. THIS HEAT AND DRY WEATHER DELAYED THE TURNING OF FALL FOLIAGE WITH MANY TREES STILL GREEN TO FINISH THE MONTH. THE FINAL TWO DAYS OF THE MONTH ENDED BELOW NORMAL WITH RAIN BOTH DAYS. LAKE ERIE DIPPED INTO THE UPPER 60S EARLY IN THE MONTH, THEN ACTUALLY WARMED THROUGH THE MONTH, TO A RECORD VALUE OF 72F ON THE 26TH AND 27TH. COOLER AIR THE END OF THE MONTH DROPPED THE LAKE TEMPERATURE BACK TO 68F AT MONTHS CLOSE. STRONGEST WINDS THIS MONTH WERE 41 MPH ON AFTERNOON OF THE 4TH. AVERAGE WIND SPEEDS WERE 2 MPH BELOW NORMAL, FINISHING AT 6.6 MPH. IN ALL, A COOL START TO MONTH GIVING WAY TO LATE SUMMER`S HEAT. && THOMAS $$

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