Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000
CXUS51 KBUF 040056
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
838 AM EDT THU AUG 1 2019

...................................

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JULY 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2019

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            92   07/20                         96  07/04
                        07/16
LOWEST             53   07/08                         53  07/07
AVG. MAXIMUM     83.9              81.0     2.9     86.3
AVG. MINIMUM     64.3              60.7     3.6     64.1
MEAN             74.1              70.8     3.3     75.2
DAYS MAX >= 90      5               2.3     2.7       11
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           2.64              3.33   -0.69     3.20
DAYS >= .01        10                                 12
DAYS >= .10         4                                  6
DAYS >= .50         2                                  3
DAYS >= 1.00        1                                  1
GREATEST
 24 HR. TOTAL    1.30   07/05 TO 07/05

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     291               193      98      324
 SINCE 1/1        384               329      55      527
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    30/250
HIGHEST GUST SPEED/DIRECTION    39/240    DATE  07/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             21
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     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.

&&

...A WARM DRY JULY FOR WESTERN AND NORTH CENTRAL NEW YORK...

JULY STARTED OUT MOSTLY DRY WITH SOME SHOWERS ACROSS WESTERN AND
NORTH CENTRAL NEW YORK. TEMPERATURES FOR MOST OF THE FIRST WEEK OF
JULY WERE WELL ABOVE NORMAL AS A WARM AND HUMID AIR MASS WAS IN
PLACE ACROSS THE REGION. A COLD FRONT CROSSED THE AREA EARLY ON THE
7TH BRINGING COOLER AND LESS HUMID AIR TO THE REGION FOR THE
FOLLOWING FEW DAYS. ANOTHER ROUND OF INCREASING HEAT AND HUMIDITY
BEGAN ON THE 10TH, STARTING A WARMER THAN NORMAL TREND FOR ALL BUT A
FEW DAYS FOR THE REMAINDER OF THE MONTH. THE REMNANTS OF POST
TROPICAL CYCLONE BARRY MOVED ALONG THE OHIO VALLEY AND PENNSYLVANIA
CAUSING A SURGE OF MOISTURE TO TRACK NORTH INTO WESTERN AND NORTH
CENTRAL NEW YORK AS A WEAK COLD FRONT MOVED SOUTH OUT OF CANADA.
WARM AND HUMID CONDITIONS RETURNED FOR A FEW DAYS STARTING ON THE
18TH, BRINGING FLORIDA LIKE HUMIDITY TO THE AREA. HEAT ADVISORIES
AND EXCESSIVE HEAT WARNINGS WERE IN EFFECT FOR THE AREA WITH THE
WARMEST HEAT INDEX VALUES EXCEEDING 105 DEGREES. ALSO DURING THIS
WARM AND HUMID STRETCH, AREAS OF THUNDERSTORMS PROMPTED SEVERE
THUNDERSTORM WARNINGS FROM THE NIAGARA FRONTIER TO THE ROCHESTER
AREA.

PRECIPITATION FOR THE MONTH WAS BELOW NORMAL IN MOST AREAS, WITH
SOME LOCATIONS HAVING WELL BELOW NORMAL RAINFALL AMOUNTS FOR THE
MONTH. FOR THE MONTH OF JULY, ROCHESTER RECEIVED 2.64 INCHES OF RAIN
WHICH IS 0.69 INCHES BELOW NORMAL OF 3.33 INCHES. FOR BOTH BUFFALO
AND ROCHESTER A MAJORITY OF THE RAINFALL RECEIVED FOR THE MONTH CAME
FROM A FEW DIFFERENT DAYS OF PERSISTENT OR HEAVY RAIN THAT QUICKLY
ADDED UP RAINFALL AMOUNTS. AN APPROACHING AREA OF LOW PRESSURE AND
COLD FRONT CROSSED THE REGION ON THE 5TH AND 6TH, AND ROCHESTER
RECEIVED 1.86" OF RAIN, TOTALING JUST OVER TWO THIRDS OF THE TOTAL
FOR THE MONTH. THE NEXT RAINFALL EVENT FOR BUFFALO AND ROCHESTER WAS
ON JULY 17TH, WHEN THE REMNANTS OF POST TROPICAL CYCLONE BARRY MOVED
SOUTH OF THE REGION. ROCHESTER RECEIVED 0.48" OF RAIN FOR THIS
EVENT. FROM JULY 18TH ONWARD THE AREA EXPERIENCED A FEW DAYS WITH
RAIN, MOST OF WHICH WERE ASSOCIATED WITH SCATTERED SHOWERS AND
THUNDERSTORMS. SOME OF THESE SHOWERS AND THUNDERSTORMS OCCASIONALLY
PRODUCED SOME HEAVIER RAINFALL AMOUNTS THAT FELL QUICKLY BEFORE
ENDING. DURING THIS TWO WEEK STRETCH, ROCHESTER RECEIVED ONLY 0.15"
OF RAIN. IN TOTAL, THE ROCHESTER AIRPORT HAD 10 DAYS THAT RECEIVED
MEASURABLE RAINFALL FOR THE MONTH OF JULY.

TEMPERATURES FOR THE MONTH OF JULY FOR MOST OF THE AREA WERE ABOVE
NORMAL BY TWO TO FOUR DEGREES. BELOW AVERAGE TEMPERATURES WERE
EXPERIENCED NINE DAYS DURING THE MONTH IN ROCHESTER, ALL REMAINING
DAYS WERE EITHER AT OR ABOVE THE NORMAL DAILY TEMPERATURE. THE
AVERAGE TEMPERATURE IN ROCHESTER WAS 74.1 DEGREES FAHRENHEIT, WHICH
IS 3.3 DEGREES FAHRENHEIT ABOVE THE NORMAL OF 70.8. A WARM HUMID
AIRMASS OVER THE AREA FROM JULY 3RD THROUGH THE 5TH CAUSED HEAT
ADVISORY CONDITIONS (HEAT INDEX OF 95F TO 104F) ACROSS PORTIONS OF
THE AREA FROM THE NIAGARA FRONTIER TO THE GENESEE VALLEY. ANOTHER
STRETCH OF HOT AND HUMID TEMPERATURES PROMPTED HEAT ADVISORIES AND
EXCESSIVE HEAT WARNINGS (HEAT INDEX OF 105F OR GREATER) FOR THE
ENTIRE BUFFALO FORECAST AREA. ROCHESTER HIT 90 DEGREES FAHRENHEIT OR
WARMER FIVE TIMES IN JULY. SOME OTHER STATISTICS INCLUDE 26 DAYS
THAT HAD HIGH TEMPERATURES GREATER THAN OR EQUAL TO 80 DEGREES
FAHRENHEIT, AND THERE WAS SEVEN DAYS WITH LOW TEMPERATURES THAT WERE
GREATER THAN OR EQUAL TO 70 DEGREES.

IN SUMMARY, A WARMER AND DRIER THAN NORMAL JULY WAS EXPERIENCED FOR
MOST OF WESTERN AND NORTH CENTRAL NEW YORK.

&&

SJW

$$


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