Text Products for CLM Issued by ROC

Climatological Report (Monthly)
Issued by NWS Buffalo, NY
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CXUS51 KBUF 052028
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
946 AM EDT MON MAY 01 2023

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF APRIL 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             93   04/28/1990
                       04/30/1970
 LOW              11   04/04/1879
HIGHEST           84   04/14                          81  04/24
                                                          04/25
LOWEST            25   04/02                          27  04/18
AVG. MAXIMUM    61.4               56.6     4.8     55.9
AVG. MINIMUM    39.0               37.1     1.9     36.9
MEAN            50.2               46.8     3.4     46.4
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.4    -0.4        0
DAYS MIN <= 32     6                9.9    -3.9        9
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.81   2011
 MINIMUM        0.94   1884
TOTALS          3.34               2.99    0.35     2.58
DAYS >= .01       15                                  15
DAYS >= .10        9                                  10
DAYS >= .50        3                                   1
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.71   03/31 TO 04/01               0.76  04/25 TO 04/26

SNOWFALL (INCHES)
RECORDS
 TOTAL          23.8   1901
TOTALS             T                3.0    -3.0        T
SINCE 7/1       50.4              101.9   -51.5       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                1.0    -1.0       MM
DAYS >= 0.1        0                                  MM
GREATEST
 SNOW DEPTH        0                                   0  MM
 24 HR TOTAL      MM                                   T  04/01 TO 04/01
                                                          04/03 TO 04/03
                                                          04/09 TO 04/09

DEGREE DAYS
HEATING TOTAL    447                549    -102      551
 SINCE 7/1      5505               5993    -488       MM
COOLING TOTAL      8                  4       4        2
 SINCE 1/1         8                  4       4       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.0
HIGHEST WIND SPEED/DIRECTION    39/250
HIGHEST GUST SPEED/DIRECTION    56/210    DATE  04/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.65
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY         16

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               1
HEAVY RAIN                2     RAIN                       8
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                6     SLEET                      3
FOG                      11     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

&&

...SIGNIFICANT WARMING EARLY AND MID-MONTH, DISMAL END TO APRIL...

THE FIRST HALF OF APRIL FEATURED AN ABUNDANCE OF FANTASTIC DAYS
ACROSS WESTERN NEW YORK AS THE REGION RECORDED A DRY 10-DAY STRETCH
AND LATER IN THE MONTH FIVE CONSECUTIVE DAYS ABOVE 75F. A DRAMATIC
TURN IN THE WEATHER OCCURRED FOR THE SECOND HALF OF THE MONTH AS
COOL AND WET DAYS BECAME PREDOMINANT. THE WARMTH THROUGH MID-MONTH
CARRIED APRIL TO A TOP 10 WARMEST APRILS ON RECORD.

THE TEMPERATURE AVERAGED 50.2F DEGREES FOR APRIL, THE 9TH WARMEST OF
153 APRILS ON RECORD. HIGHLIGHTS INCLUDE THE FIVE DAYS ABOVE 75F
FROM THE 12TH TO THE 16TH. THE 7 DAYS IN TOTAL AT OR ABOVE 75F IS
TIED FOR 5TH GREATEST ON APRIL RECORD. WHILE THERE WERE NO DAILY
RECORD HIGH TEMPERATURES, THERE WAS ONE RECORD WARM MINIMUM RECORD
ESTABLISHED, THIS THE 59F ON THE 13TH BREAKING THE FORMER RECORD OF
58F SET BACK IN 1896. THERE WERE AN EQUAL NUMBER OF ABOVE AND BELOW
NORMAL TEMPERATURE DAYS. 

PRECIPITATION TOTALED 3.34 INCHES FOR THE MONTH, FINISHING ABOUT A
THIRD OF AN INCH ABOVE NORMAL FOR THE MONTH. ALL FOUR MONTHS TO
START THE YEAR HAVE MEASURED ABOVE NORMAL PRECIPITATION. ON THE 1ST
THE 0.71 INCHES OF PRECIPITATION WAS THE WETTEST DAY FOR THE MONTH.
FROM THE 6TH TO THE 15TH NO MEASURABLE PRECIPITATION WAS RECORDED.
THERE WERE 8 DAYS THAT RECORDED A TRACE OF SNOW. A TRACE OR MORE OF
SNOW HAS FALLEN IN ALL BUT ONE (1998) OF ROCHESTER`S SNOW PERIOD OF
RECORD.

APRIL BEGAN WITH A PAIR OF COLD FRONTS, ONE THAT BROUGHT EARLY
MORNING RAIN, AND A SECOND THAT BROUGHT STRONG THUNDERSTORMS ACROSS
WESTERN NEW YORK DURING THE AFTERNOON. SURFACE HIGH PRESSURE BROUGHT
FAIR WEATHER ON THE 2ND, THIS PALM SUNDAY, WHICH WAS THEN FOLLOWED
BY CLOUDS AND A WARM FRONT ON MONDAY THE 3RD. A FEW LIGHT RAIN
SHOWERS FELL WITH THE WARM FRONT. ANOTHER FRONTAL BOUNDARY STALLED
OVER THE REGION ON THE 4TH AND 5TH WITH OVER AN INCH OF RAIN FALLING
WITH THIS FRONT. THIS FRONT NUDGED NORTHWARD SOME ON THE 5TH
ALLOWING FOR A BRIEF PERIOD IN THE UPPER 70S BEFORE THE FRONT
DROPPED SOUTHWARD AND COOLER LAKE ONTARIO SOURCED AIR POURED
SOUTHWARD ACROSS ROCHESTER LATER IN THE DAY. WHILE A SPRINKLE FELL
ON THE 6TH, MUCH DRIER AIR PUSHED INTO THE REGION AND COMMENCED A
BEAUTIFUL, DRY 10-DAY STRETCH OF EARLY SPRING WEATHER THAT WAS VERY
MUCH WARRANTED AFTER A WET START TO SPRING. IN THIS DRY AIRMASS THE
GROUND QUICKLY DRIED OUT AND THE TEMPERATURE SOARED TO 81F ON THE
13TH, AND THEN 84F ON FRIDAY THE 14TH, THIS THE WARMEST DAY OF THE
MONTH. THE AIR TEMPERATURE RETURNED INTO THE 80S ON THE 16TH BEFORE
A COLD FRONT ARRIVED LATER THAT DAY AND BROUGHT SHOWERS AND GUSTY
WINDS. THIS COLD FRONT ALSO SIGNALED A PATTERN CHANGE AS ONLY 2 DAYS
THE FINAL HALF OF APRIL REMAINED DRY. THERE WERE ALSO NUMEROUS LIGHT
SNOW AND GRAUPEL SHOWERS THIS MONTH, INCLUDING A STRETCH FROM THE
17TH TO 20TH AND AGAIN FROM THE 24TH TO 26TH.   

WINDS WERE NEARLY NORMAL FOR THE MONTH AT 10.0 MPH. THE STRONGEST
WIND GUST OCCURRED ON THE 22ND, THIS AT 56 MPH DURING A MIDDAY COLD
FRONT PASSAGE.  

IN ALL, A BEAUTIFUL, WARM MID-APRIL, BUT A DREARY END. 

&&

THOMAS

$$
National Weather Service Weather Forecast Office
