Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 040245
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
556 PM EDT WED MAY 1 2019

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              93   04/28/1990
                        04/30/1970
 LOW               11   04/04/1879
HIGHEST            75   04/23                         71  04/23
                        04/18
LOWEST             24   04/01                         22  04/09
AVG. MAXIMUM     55.9              56.0    -0.1     49.4
AVG. MINIMUM     37.9              36.6     1.3     32.3
MEAN             46.9              46.3     0.6     40.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.2    -0.2        0
DAYS MIN <= 32      7               9.5    -2.5       19
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.81   2011
 MINIMUM         0.94   1884
TOTALS           2.74              2.73    0.01     3.50
DAYS >= .01        17                                 19
DAYS >= .10         8                                  8
DAYS >= .50         2                                  1
DAYS >= 1.00        0                                  1
GREATEST
 24 HR. TOTAL    0.77   04/19 TO 04/19

SNOWFALL (INCHES)
RECORDS
 TOTAL           23.8   1901
TOTALS            2.2               3.9    -1.7      5.2
SINCE 7/1        97.1              99.1    -2.0    120.5
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         1               1.2    -0.2        2
GREATEST
 SNOW DEPTH         2   04/01                          1  04/06
 24 HR TOTAL      1.9   04/01 TO 04/01

DEGREE_DAYS
HEATING TOTAL     535               565     -30      718
 SINCE 7/1       6124              6303    -179     6126
COOLING TOTAL       0                 4      -4        0
 SINCE 1/1          0                 4      -4        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.7
HIGHEST WIND SPEED/DIRECTION    39/290    DATE  04/03
HIGHEST GUST SPEED/DIRECTION    52/290    DATE  04/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         18

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       7
LIGHT RAIN               20     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                6     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      1
HAZE                      4

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

&&

...A VARIETY OF SPRING WEATHER IN APRIL...

APRIL 2019 FEATURED A VARIETY OF SPRINGLIKE WEATHER, WITH SNOWFLAKES
ACCUMULATING NEAR THE BEGINNING AND END OF THE MONTH. IN BETWEEN,
SEVERAL PLEASANT WARM-UPS BROUGHT TEMPERATURES INTO THE 70S AND THE
FIRST SEVERE THUNDERSTORM OUTBREAK OCCURRED WITH DAMAGING WINDS
ACROSS THE SOUTHERN GENESEE VALLEY.

THE TEMPERATURE AVERAGED 46.9F FOR THE MONTH, WHICH IS ABOUT A HALF
OF A DEGREE ABOVE NORMAL. LIKE MARCH, THIS APRIL FEATURED THE SPRING
TEMPERATURE UPS AND DOWNS WITH BELOW NORMAL TEMPERATURE DAYS
OUTNUMBERING ABOVE NORMAL TEMPERATURE DAYS BY 4. THE FIRST 75F DAY
OF THE YEAR OCCURRED ON THE 18TH, TYPICAL FOR THIS TIME OF YEAR AND
THERE WERE NO RECORDS SET OR EXTREMES IN THE TEMPERATURE.

PRECIPITATION WAS NEARLY NORMAL FOR THE MONTH, FINISHING AT 2.74
INCHES. THERE WERE 17 DAYS WITH MEASURABLE PRECIPITATION, FOUR MORE
THAN NORMAL. THE LONGEST DRY STRETCH CAME ON THE 24TH TO 25TH WHEN
NO RAIN FELL. SNOWFALL TOTALED 2.2 INCHES FOR THE MONTH. THE BULK OF
THIS SNOW OCCURRED IN THE FIRST FEW HOURS OF THE MONTH, WHEN 1.9
INCHES OF SNOW ACCUMULATED. THE 0.3 INCHES OF SNOW ON THE 27TH TIED
A RECORD FOR THE DATE, WHICH WAS LAST SET BACK IN 1946.

SINCE SNOWFALL RECORDS BEGAN IN 1884, EVERY APRIL MONTH EXCEPT ONE
(1998) HAS HAD AT LEAST OF TRACE OF SNOW...AND THIS APRIL WAS NO
EXCEPTION. AFTER A FEW INCHES OF SNOW FELL ON THE 1ST, HIGH PRESSURE
BROUGHT PLEASANT...BUT COOL CONDITIONS TO WESTERN NEW YORK. A WARM
FRONT LIFTED ACROSS THE REGION ON THE 5TH, AND THIS BROUGHT
CONSECUTIVE DAYS IN THE 60S ON THE 6TH THROUGH 9TH. ANOTHER WARM
FRONT ON THE 12TH BROUGHT THE 70S BACK TO ROCHESTER, WITH A HIGH OF
73F DURING THE AFTERNOON. THE FIRST OUTBREAK OF SEVERE THUNDERSTORMS
IN WESTERN NEW YORK OCCURRED ON SUNDAY THE 14TH. A DYNAMIC LOW
TRACKED JUST TO THE NORTH OF OUR REGION AND THOUGH INSTABILITY WAS
AT A MINIMUM, THE STRONG LOW LEVEL JET WITH THE STRONG LOW FORCED
SEVERE STORMS. THESE STORMS PRIMARILY IMPACTED THE SOUTHERN TIER AND
SOUTHERN GENESEE VALLEY WITH LARGE HAIL TO 2 INCHES IN DIAMETER AND
DAMAGING WIND GUSTS. COOL CONDITIONS FOLLOWED THIS THUNDERSTORM
EVENT, WITH HIGHS ON THE 15TH ONLY IN THE 40S. SPRINGS WARMTH AGAIN
MADE A COMEBACK A FEW DAYS LATER WITH TEMPERATURES AGAIN REBOUNDING
BACK INTO THE 70S, ALBEIT WITH UNSETTLED CONDITIONS THE THIRD WEEK
OF APRIL. THE LAST SNOW OF APRIL OCCURRED ON THE 27TH OF THE MONTH
WITH SEVERAL TENTHS OF AN INCH RECORDED. THE MONTH FINISHED ON THE
COOL SIDE WITH SCATTERED SHOWERS AROUND.

WATER TEMPERATURE REMAINED COOL ON LAKE ONTARIO, WITH WATER VALUES
NEAR ROCHESTER REACHING UP INTO THE LOWER 40S BY MONTHS CLOSE. WINDS
WERE A SHADE BELOW NORMAL, AND THE STRONGEST GUST OCCURRED ON THE
3RD AT 52 MPH.

IN ALL, A FAIRLY TYPICAL APRIL WITH SNOW, THUNDERSTORMS AND BATTLING
LATE WINTER CHILL AND EARLY SUMMER WARMTH.

&&

THOMAS

$$



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