174
CXUS51 KBUF 052130
CLMROC
CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
141 PM EDT SAT AUG 1 2020
...............................
..THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JULY 2020
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2020
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 24 07/01/2016
HIGHEST 97 07/09 92 07/20
07/16
LOWEST 59 07/31 53 07/08
07/05
AVG. MAXIMUM 85.9 81.0 4.9 83.9
AVG. MINIMUM 65.3 60.7 4.6 64.3
MEAN 75.6 70.8 4.8 74.1
DAYS MAX >= 90 8 2.3 5.7 5
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 5.54 3.33 2.21 2.64
DAYS >= .01 10 10
DAYS >= .10 5 4
DAYS >= .50 2 2
DAYS >= 1.00 2 1
GREATEST
24 HR. TOTAL 3.18 07/11 TO 07/11
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 MM
DEGREE_DAYS
HEATING TOTAL 0 12 -12 0
SINCE 7/1 0 12 -12 0
COOLING TOTAL 337 193 144 291
SINCE 1/1 547 329 218 384
.............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.5
HIGHEST WIND SPEED/DIRECTION 25/250
HIGHEST GUST SPEED/DIRECTION 33/270 DATE 07/27
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.50
NUMBER OF DAYS FAIR 5
NUMBER OF DAYS PC 22
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 67
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 6
LIGHT RAIN 9 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 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
..PERSISTENT SUMMER HEAT
RELENTLESS HEAT WAS UPON WESTERN NEW YORK THROUGH THE MONTH OF JULY,
AND FOR THE FIRST TIME IN RECORDED HISTORY, A MONTH FEATURED EVERY
DAY AVERAGING 70F OR GREATER. THE PINNACLE OF THE HEAT WAVE WAS
EARLY IN THE MONTH WHEN THE TEMPERATURE SOARED TO 97F/9TH AND
93F/10TH. THE 97F READING WAS 5 DEGREES REMOVED FROM THE ALL-TIME
WARMEST TEMPERATURE RECORDED AT ROCHESTER, AND WAS THE WARMEST
TEMPERATURE SINCE 98F ON JULY 21ST 2011. A DRY GROUND AIDED IN THE
BUILDING HEAT EARLY IN THE MONTH, THOUGH SEVERAL BOUTS OF
THUNDERSTORMS AND RAIN MID MONTH ONWARD ALLOWED VEGETATION TO
FRESHEN.
THE TEMPERATURE AVERAGED 75.6F IN JULY. THIS IS TIED FOR THE 3RD
WARMEST JULY ON RECORD, AND 4TH WARMEST ALL-TIME MONTHLY TEMPERATURE
ON RECORD. FROM JULY 5TH TO JULY 10TH THE MAXIMUM TEMPERATURE
REACHED INTO THE 90S EVERY DAY...AND THESE 6 CONSECUTIVE 90 DEGREE
DAYS ARE TIED FOR 5TH PLACE FOR CONSECUTIVE DAYS IN THE 90S. THE
'COOLEST' TEMPERATURE THIS MONTH WAS ONLY 59F, TIED FOR THE WARMEST
MONTHLY MINIMUM TEMPERATURE ON RECORD. THE OTHER TWO MONTHS WHEN THE
TEMPERATURE DIPPED TO ONLY 59F WERE JULY OF 1897, AND JULY OF 1887.
THOUGH HEAT GRIPPED WESTERN NEW YORK THIS MONTH, THERE WERE NO
RECORDS BROKEN.
PRECIPITATION TOTALED ABOVE NORMAL FOR THE MONTH, WITH THE 5.54
INCHES OF PRECIPITATION OVER 2 INCHES ABOVE NORMAL. THE
PRECIPITATION HIGHLIGHT THIS MONTH OCCURRED ON THE 11TH WHEN 3.18
INCHES OF RAIN FELL. THOUGH NOT A DAILY RECORD (3.26/1897) IT WAS
THE 10TH GREATEST CALENDAR DAY PRECIPITATION EVENT ON RECORD. HEAVY
RAINS ALSO FELL ON THE 16TH, WITH 1.70 INCHES RECORDED. THOUGH JULY
WAS THE 12TH WETTEST ON RECORD, THE 10 DAYS WITH MEASURABLE RAINFALL
WERE 1 LESS THAN NORMAL. THE DRY ANTECEDENT CONDITIONS ALLOWED FOR
LITTLE IMPACTS FROM THIS RAIN EVENT.
HIGH PRESSURE GRIPPED THE EASTERN GREAT LAKES REGION THE FIRST 10
DAYS OF THE MONTH. WITH LITTLE RAINFALL, THE GROUND AND VEGETATION
DRIED, AND ROCHESTER HAD THE HEAT CRESCENDO ON THE 9TH AT 97F. A
WEAK COLD FRONT CROSSED WESTERN NEW YORK ON THE 10TH, AND THIS
BROUGHT AN END TO THE HEAT WAVE WHILE ALSO PRODUCING A FEW ISOLATED
STRONG THUNDERSTORMS. DRENCHING THUNDERSTORMS CONTINUED ON THE 11TH,
WITH SEVERAL CELLS PASSING OVER ROCHESTER BRINGING FLASH FLOODING.
A MORE WIDESPREAD SEVERE EVENT OCCURRED ON THE 16TH OF THE MONTH
WITH DAMAGING WINDS AND HEAVY DOWNPOURS OF RAIN. THESE RAINS BROUGHT
DROUGHT RELIEF, WITH PARCHED GRASS RETURNING BACK TO LIFE. A WARM
FRONT LIFTED ACROSS WESTERN NEW YORK ON THE 22ND, PRODUCING RAIN
SHOWERS AND GARDEN VARIETY THUNDERSTORMS. ANOTHER ROUND OF SEVERE
WEATHER CLOSED OUT THE MONTH ON THE 29TH AS SEVERAL SUPERCELLS LEFT
A TRACK OF DAMAGE...ONE FROM THE SOUTHERN TIER TO THE FINGER LAKES
REGION AND ANOTHER ALONG THE SOUTHERN LAKE ONTARIO SHORELINE. THE
SUPERCELL THAT TRACKED TO THE SOUTH OF LAKE ONTARIO BROUGHT A WEAK
TORNADO TO SOUTHERN MONROE COUNTY DURING THE EARLY EVENING HOURS OF
THE 29TH.
LAKE ONTARIO QUICKLY WARMED THE FIRST HALF OF THE MONTH, AND THE
WARMEST WATER TEMPERATURE READING OCCURRED AT MONTHS END, WITH A
READING OF 78F. WINDS WERE A TICK ABOVE NORMAL FOR THE MONTH, THOUGH
THERE WERE LITTLE GUSTS, WITH THE HIGHEST BEING JUST 33 MPH ON
MONDAY THE 27TH.
IN ALL, JULY WAS A HOT MONTH WITH SCATTERED DRENCHING STORMS TO
CLOSE OUT THE MONTH.
THOMAS
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