Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 022351
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
751 PM EDT THU MAY 2 2013

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013

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            77   04/18                         87  04/16
LOWEST             22   04/04                         27  04/29
                                                          04/28
AVG. MAXIMUM     56.9              56.0     0.9     56.2
AVG. MINIMUM     36.4              36.6    -0.2     35.5
MEAN             46.6              46.3     0.3     45.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.2    -0.2        0
DAYS MIN <= 32      9               9.5    -0.5       11
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.81   2011
 MINIMUM         0.94   1884
TOTALS           2.71              2.73   -0.02     3.05
DAYS >= .01        14                                 13
DAYS >= .10         4                                  5
DAYS >= .50         3                                  2
DAYS >= 1.00        0                                  1
GREATEST
 24 HR. TOTAL    1.05   04/09 TO 04/10

SNOWFALL (INCHES)
RECORDS
 TOTAL           23.8   1901
TOTALS            2.3               3.9    -1.6      2.8
SINCE 7/1        78.1              99.1   -21.0     59.9
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         1               1.2    -0.2        1
GREATEST
 SNOW DEPTH         1   04/02                          2  04/23
 24 HR TOTAL      1.9   MM

DEGREE_DAYS
HEATING TOTAL     545               565     -20      576
 SINCE 7/1       5824              6303    -479     5133
COOLING TOTAL       1                 4      -3        8
 SINCE 1/1          1                 4      -3       13
....................................................

WIND (MPH)
AVERAGE WIND SPEED              11.1
HIGHEST WIND SPEED/DIRECTION    38/260
HIGHEST GUST SPEED/DIRECTION    55/250    DATE  04/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       6
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       5
LIGHT SNOW                4     SLEET                      1
FOG                       8     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

$$

...SPRINGTIME ARRIVES IN WESTERN NEW YORK...

APRIL 2013 SAW THE TRANSITION FROM WINTERTIME TO SPRING ACROSS
WESTERN NEW YORK WITH PLENTY OF UNSETTLED WEATHER AS A NUMBER OF
STORM SYSTEMS TRACKED ACROSS THE LOWER GREAT LAKES. IN SPITE OF THE
UNSETTLED WEATHER ROCHESTER AIRPORT RECORDED 2.71 INCHES FOR THE
MONTH...TWO HUNDREDTHS OF AN INCH BELOW NORMAL. THE WETTEST PERIOD
DURING THE MONTH WAS THE 9TH THROUGH 12TH OF APRIL WHEN A STALLED
FRONTAL BOUNDARY BROUGHT SIGNIFICANT RAINFALL TO THE
REGION...ACCOUNTING FOR 2.23 INCHES OVER THE FOUR DAY
PERIOD...REPRESENTING THE MAJORITY OF THE MONTH`S RAINFALL. WITH
REGARDS TO SNOW...ROCHESTER RECEIVED 2.3 INCHES WHICH WAS 1.6 INCHES
BELOW NORMAL. THIS BRINGS THE SEASONAL TOTAL TO 78.1 INCHES...21.0
INCHES BELOW NORMAL...THOUGH NEARLY 20 INCHES AHEAD OF WHERE WE WERE
AT THIS POINT IN 2012.

SIMILAR TO PRECIPITATION...APRIL ENDED UP BEING A FAIRLY AVERAGE
MONTH WITH REGARDS TO TEMPERATURES. THE AVERAGE TEMPERATURE FOR THE
MONTH WAS 46.6 DEGREES...0.3 DEGREES ABOVE NORMAL. THE DISTRIBUTION
OF ABOVE VERSUS BELOW NORMAL DAYS REFLECTED THIS WELL WITH 13 DAYS
THAT WERE ABOVE NORMAL AND 16 DAYS BELOW NORMAL WITH ONE DAY...APRIL
12TH...THAT WAS EXACTLY NORMAL. NO RECORDS WERE SET DURING THE
MONTH. THE MOST DRAMATIC TEMPERATURE SHIFT OF THE MONTH INVOLVED A
STRONG COLD FRONTAL PASSAGE ON THE 19TH OF APRIL WHEN THE
TEMPERATURE DROPPED NEARLY 20 DEGREES IN ONE HOUR BETWEEN 2 PM AND 3
PM.

&&

WOOD






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