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Climatological Report (Monthly)
Issued by NWS Buffalo, NY
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CXUS51 KBUF 051326
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
826 AM EDT FRI SEP 01 2023

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2023

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           85   08/07                          93  08/07
LOWEST            51   08/28                          50  08/13
                       08/31
AVG. MAXIMUM    77.2               80.5    -3.3     83.1
AVG. MINIMUM    60.0               61.0    -1.0     62.0
MEAN            68.6               70.7    -2.1     72.5
DAYS MAX >= 90     0                1.9    -1.9        4
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          5.44               3.31    2.13     3.37
DAYS >= .01       11                                  11
DAYS >= .10        6                                   6
DAYS >= .50        3                                   3
DAYS >= 1.00       3                                   1
GREATEST
 24 HR. TOTAL   3.17   08/15 TO 08/16               1.18  08/22 TO 08/23

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      7                 12      -5        0
 SINCE 7/1         7                 13      -6       MM
COOLING TOTAL    125                190     -65      245
 SINCE 1/1       454                596    -142       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
HIGHEST WIND SPEED/DIRECTION    29/260
HIGHEST GUST SPEED/DIRECTION    41/190    DATE  08/07
                                41/270          08/18

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.68
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       4
LIGHT RAIN               15     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      0
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

... COOL AND WET AUGUST ...

IT`S BEEN SEVERAL SUMMERS SINCE WE`VE HAD A COOLER THAN NORMAL
AUGUST ACROSS WESTERN NEW YORK, WITH THIS YEAR THE FIRST SINCE 2017
FEATURING BELOW NORMAL WARMTH. IT WAS A WET MONTH, WITH STORMS LATE
ON THE 15TH AND INTO THE EARLY MORNING HOURS OF THE 16TH PRODUCING
MORE THAN HALF OF THE MONTH`S RAINFALL AND HELPING AUGUST AS A WHOLE
TO FINISH 12TH WETTEST. 

THE TEMPERATURE AVERAGED 68.6F THIS MONTH, WHICH IS 2.1F DEGREES
BELOW NORMAL. THIS IS THE COOLEST AUGUST SINCE 2017, WHICH ALSO
FINISHED WITH THE SAME AVERAGE TEMPERATURE. DAYS IN THE 80S WERE
LACKING THIS MONTH WITH JUST 1 DAY TOPPING THE 85F MARK. ONLY THE
YEAR 1912 FAILED TO REACH AT LEAST 85F DURING THE MONTH OF AUGUST.
THERE WERE 19 DAYS BELOW NORMAL FOR THE MONTH, WHILE JUST 9 DAYS
FEATURED ABOVE NORMAL TEMPERATURES. EVEN OF THESE 9 DAYS, THE
GREATEST DEPARTURE WAS JUST 5 DEGREES FROM NORMAL, THIS BEING ON THE
7TH. THE WARMEST TEMPERATURE WAS JUST 85F THIS MONTH.  

PRECIPITATION FOR THE MONTH WAS WELL ABOVE NORMAL, FINISHING MORE
THAN TWO-INCHES ABOVE THE NORMAL OF 3.31 INCHES. THE BULK OF THIS
PRECIPITATION TOTAL CAME DURING THE 15TH THROUGH THE 16TH.
THUNDERSTORMS, SLOWLY MOVING, DROPPED NEARLY AN INCH OF RAIN DURING
THE AFTERNOON AND EVENING HOURS OF THE 15TH, AND THEN MORE THAN TWO
INCHES OF RAIN BEFORE DAWN ON THE 16TH, INCLUDING 1.09 INCHES OF
RAIN BETWEEN 4 AND 5 AM AT THE AIRPORT. FOR THE FIRST TIME IN
AUGUST, THERE WERE THREE DAYS THAT RECORDED AT LEAST AN INCH OF
RAINFALL, THESE BEING THE 15TH, 16TH AND 24TH. THOUGH A WET MONTH
THE 11 DAYS WITH MEASURABLE PRECIPITATION IS JUST ONE DAY MORE THAN
THE NORMAL OF 10.    

FOR THE MONTH OF AUGUST AN ANOMALOUS STRONG MID LEVEL RIDGE OF HIGH
PRESSURE SCORCHED THE SOUTHERN PLAINS, WHILE LOWER HEIGHT ANOMALIES
LAID ACROSS THE NORTHEAST. THIS PATTERN KEPT PLENTY OF COMFORTABLE
SUMMER DAYS ACROSS WESTERN NEW YORK, WITH SEVERAL DAYS BEHIND COLD
FRONTS BORDERING THE LINE OF TOO COOL FOR SUMMER. THE FIRST ACTIVE
PERIOD OF WEATHER WAS THE 6TH AND 7TH OF THE MONTH. A WARM FRONT
BROUGHT SCATTERED RAIN SHOWERS TO THE GENESEE VALLEY LATE ON THE
6TH, WHILE AN UNSTABLE ATMOSPHERE BREWED THUNDERSTORMS ON THE 7TH
DURING THE AFTERNOON. WHILE THESE STORMS WERE BELOW SEVERE LIMITS
ACROSS WESTERN NEW YORK, TO THE EAST AN EF3 TORNADO RIPPED THROUGH
SOUTHERN LEWIS COUNTY. ON THE 15TH SHOWERS AND THUNDERSTORMS
BLOSSOMED DURING THE AFTERNOON AND EVENING HOURS ACROSS THE GENESEE
VALLEY. THIS PRIMED THE AREA FOR POTENTIAL FLOODING AS ADDITIONAL
STORMS AND DELUGES OF RAIN EARLY ON THE 16TH CLOSED SEVERAL STREETS
ACROSS THE METRO AREA AND MADE FOR A SLOW COMMUTE INTO WORK WITH
SEVERAL MAJOR ROUTES FEATURING DEEP PONDING WATER. A COLD FRONT ON
THE 17TH BROUGHT SCATTERED SHOWERS AND THUNDERSTORMS TO THE
ROCHESTER METRO AREA ON THE 17TH, WITH AN UPPER LEVEL LOW LINGERING
SHOWERS, AND EVEN SOME LAKE EFFECT RAIN AROUND THE REGION ON THE
18TH. LATE ON THE 24TH A LINE OF SHOWERS AND STRONG THUNDERSTORMS
DROPPED SOUTHEASTWARD ACROSS WESTERN NEW YORK. ROCHESTER PICKED UP
ITS THIRD CALENDAR DAY WITH AT LEAST AN INCH OF PRECIPITATION WITHIN
THIS ACTIVITY. FINALLY A COLD FRONT ON THE 30TH BROUGHT EARLY
MORNING RAIN SHOWERS TO ROCHESTER, AND LEFT A CHILLY DAY IN THE 60S,
AND OVERNIGHT LOWS IN THE LOWER 50S BEHIND IT.

THE WINDS WERE SLIGHTLY ABOVE NORMAL FOR THE MONTH, AVERAGING 0.2
MILES PER HOUR ABOVE THE NORMAL OF 7.0 MPH THE STRONGEST WIND GUSTS
OCCURRED IN THUNDERSTORMS, THIS AT 41 MPH ON THE 18TH.

IN ALL A COOL, WET MONTH LACKING MUCH SEVERE STORMS.

&&

THOMAS                                                               

$$
National Weather Service Weather Forecast Office
