942
CXUS51 KBUF 020158
CLMROC
CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
1110 AM EDT THU AUG 01 2024
...............................
..THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JULY 2024
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 102 07/10/1936
07/09/1936
LOW 42 07/09/1963
HIGHEST 90 07/03 91 07/06
07/14
07/30
LOWEST 52 07/02 56 07/30
07/31
AVG. MAXIMUM 84.0 82.5 1.5 81.2
AVG. MINIMUM 64.2 62.2 2.0 62.6
MEAN 74.1 72.3 1.8 71.9
DAYS MAX >= 90 3 3.5 -0.5 1
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 9.70 1947
MINIMUM 0.43 1933
TOTALS 2.56 3.56 -1.00 6.81
DAYS >= .01 12 16
DAYS >= .10 5 13
DAYS >= .50 3 6
DAYS >= 1.00 0 0
GREATEST
24 HR. TOTAL 1.17 07/15 TO 07/16 1.30 07/02 TO 07/03
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 0 6 -6 0
SINCE 7/1 0 0 0 MM
COOLING TOTAL 289 234 55 222
SINCE 1/1 528 406 122 MM
............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.6
HIGHEST WIND SPEED/DIRECTION 33/240 DATE 07/14
HIGHEST GUST SPEED/DIRECTION 40/240 DATE 07/14
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.58
NUMBER OF DAYS FAIR 6
NUMBER OF DAYS PC 17
NUMBER OF DAYS CLOUDY 8
AVERAGE RH (PERCENT) 69
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 4
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 8 FOG W/VIS <= 1/4 MILE 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
.. STORMY, HUMID JULY, RECORD NUMBER OF TORNADOES
FOR A REGION WHERE TORNADO OCCURRENCES ARE INFREQUENT, SWARMS OF
TORNADOES THIS JULY BROUGHT A TOTAL OF 9 TORNADOES TO WESTERN NEW
YORK, WITH THESE TORNADO TOUCHDOWNS SPANNING FROM CHAUTAUQUA COUNTY
TO OSWEGO COUNTY, SOUTH OF THE METRO AREAS OF BUFFALO AND ROCHESTER.
THE PRELIMINARY TOTAL FOR NEW YORK STATE IS 23 TWISTERS TOUCHING
DOWN, A RECORD FOR THE STATE FOR THE MONTH OF JULY AND THE 9
TORNADOES FOR WESTERN NEW YORK BROKE THE RECORD OF 5 FOR JULY SET IN
2009 AND 2010. THIS YEAR ALSO CONTINUED TO BE WARM, WITH JULY
ANOTHER PERSISTENTLY WARM MONTH WITH THE AVERAGE TEMPERATURE FOR
JULY WELL ABOVE NORMAL.
THE TEMPERATURE AVERAGED 74.1°F THIS MONTH, TIED FOR 17TH WARMEST ON
RECORD. THIS IS THE 8TH CONSECUTIVE MONTH FEATURING ABOVE NORMAL
TEMPERATURE WARMTH. ABOVE NORMAL TEMPERATURE DAYS OUTWEIGHED BELOW
NORMAL TEMPERATURE DAYS 22 TO 9. THERE WAS NO EXTREME HEAT THIS
MONTH, WITH THE GREATEST AVERAGE TEMPERATURE DEPARTURE 9 DEGREES
OCCURRING ON THE 3RD. THERE WERE 26 DAYS THAT REACHED INTO THE 80S,
5 DAYS MORE THAN THE AIRPORT TYPICAL TOTAL AND THESE 26 DAYS RANKED
TIED FOR 11TH GREATEST FOR JULY.
PRECIPITATION TOTALED 2.56 INCHES, WHICH IS EXACTLY 1.00 INCHES
BELOW NORMAL. MEANINGFUL RAIN THIS MONTH WAS CONCENTRATED TOWARDS
THE MIDDLE, WITH A DAILY RECORD 0.89 INCHES ON THE 10TH FOLLOWED BY
0.51 INCHES ON THE 15TH AND 0.66 INCHES OF PRECIPITATION ON THE
16TH. THERE WERE DRY STRETCHES, WITH A TWO WEEK PERIOD FROM THE 17TH
TO THE 30TH RECORDING JUST FOUR-HUNDREDTHS OF AN INCH OF RAIN, BUT
EARLIER RAINS IN THE MONTH GAVE ENOUGH RESERVE TO KEEP AREA
VEGETATION FROM DRYING OUT.
HIGH PRESSURE STARTED JULY WITH COMFORTABLE LEVELS OF HUMIDITY, AND
PRECIPITATION FREE DAYS. BEHIND THIS SURFACE HIGH, THE HUMIDITY
STARTED TO BUILD THROUGH THE REMAINDER OF THE FIRST WEEK OF THE
MONTH, WITH ISOLATED SHOWERS AND THUNDERSTORMS. THE REMNANTS OF
BERYL SPUN ACROSS THE REGION ON THE 10TH WITH NUMEROUS SHOWERS AND
THUNDERSTORMS. SEVERAL SPIN-UPS OCCURRED WITHIN THESE THUNDERSTORMS,
WITH A TOTAL OF 6 CONFIRMED TORNADOES, 4 OF WHICH OCCURRED IN
CHAUTAUQUA, ERIE AND GENESEE COUNTIES, WITH ANOTHER 2 OCCURRING IN
WAYNE AND OSWEGO COUNTIES. IN ADDITION, DAMAGING WINDS BROUGHT DOWN
SEVERAL TREES AND WIRES THROUGH WESTERN NEW YORK. IT REMAINED WARM
THROUGH MID-MONTH, WITH WIDESPREAD DRENCHING THUNDERSTORMS ON THE
15TH AND 16TH. THE 15TH ALSO BROUGHT A SECOND DAY OF WIDESPREAD
DAMAGING THUNDERSTORMS TO WESTERN NEW YORK. A SPIN IN THE MID
ATMOSPHERE, A MESOSCALE CONVECTIVE VORTEX, AIDED IN THE FORMATION OF
AN ADDITIONAL 2 TORNADOES ON THE 15TH, WITH ONE EACH TOUCHING DOWN
IN GENESEE AND ONTARIO COUNTIES. THUNDERSTORMS ALSO PRODUCED 2.5-
INCH HAIL IN ONTARIO COUNTY, THIS IN ADDITION TO DAMAGING WIND GUSTS
THROUGH THE GENESEE VALLEY. FOLLOWING THESE STORMS, A COLD FRONT
PASSED ACROSS THE REGION ON THE 17TH SENDING HUMIDITY, SHOWERS AND
THUNDERSTORMS EASTWARD. THREE BEAUTIFUL DRY DAYS OCCURRED ON THE
18TH TO THE 20TH LEADING INTO A PLEASANT WEEKEND. A FEW SHOWERS AND
THUNDERSTORMS AGAIN OCCURRED THROUGH THE LAST FULL WORK WEEK OF JULY
BEFORE AGAIN A COLD FRONT LATE WEDNESDAY NIGHT BROUGHT BACK
BEAUTIFUL WEATHER TO FINISH THE WEEK AND WEEKEND. A FEW SHOWERS AND
THUNDERSTORMS CLOSED OUT THE MONTH ACROSS WESTERN NEW YORK, THOUGH
ACTIVITY REMAINED BELOW SEVERE THRESHOLDS.
THE TEMPERATURE ON LAKE ONTARIO ROSE TO 76°F THE FINAL DAYS OF THE
MONTH. THE WINDS AVERAGED BELOW NORMAL FOR JULY, AND THE STRONGEST
GUST WAS 40 MPH FROM THE SOUTHWEST DURING THE MIDDAY HOURS OF THE
14TH.
IN ALL, JULY 2024 WILL BE NOTED FOR THE LARGE NUMBER OF TORNADOES BY
WESTERN NEW YORK STANDARDS, IN ADDITION TO PERSISTENT HUMIDITY AND
VERY WARM DAYS.
THOMAS
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