Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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051
CXUS51 KBUF 040516
CLMBUF

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
142 PM EDT THU JUN 1 2017

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

...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF MAY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              94   05/22/1911
 LOW               25   05/04/1926
HIGHEST            83   05/18                         90  05/28
LOWEST             34   05/09                         38  05/16
                        05/08                             05/15
AVG. MAXIMUM     63.9              66.5    -2.6     68.8
AVG. MINIMUM     48.3              47.4     0.9     49.0
MEAN             56.1              56.9    -0.8     58.9
DAYS MAX >= 90      0               0.0     0.0        1
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.2    -0.2        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.09   2011
 MINIMUM         0.53   1877
TOTALS           6.35              3.46    2.89     1.21
DAYS >= .01        14                                  7
DAYS >= .10        10                                  3
DAYS >= .50         3                                  0
DAYS >= 1.00        3                                  0
GREATEST
 24 HR. TOTAL    1.79   05/25 TO 05/25

SNOWFALL (INCHES)
RECORDS
 TOTAL            7.9   1989
TOTALS            0.0               0.3    -0.3        T
SINCE 7/1        76.1              94.7   -18.6
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

DEGREE_DAYS
HEATING TOTAL     286               272      14      237
 SINCE 7/1       5594              6553    -959     5595
COOLING TOTAL      21                23      -2       59
 SINCE 1/1         27                26       1       59
....................................................

WIND (MPH)
AVERAGE WIND SPEED              10.4
HIGHEST WIND SPEED/DIRECTION    33/240    DATE  05/02
HIGHEST GUST SPEED/DIRECTION    51/230    DATE  05/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         18

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       7
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     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.

&&

...VERY WET MAY FOR WESTERN NEW YORK...

A WET SPRING CONTINUED THROUGH THE MONTH OF MAY AS SLOW MOVING STORM
SYSTEMS, AND HEAVY DOWNPOURS FROM THUNDERSTORMS CONTINUED TO
SATURATE WESTERN NEW YORK. COMBINED WITH MARCH AND APRIL, THE THREE
SPRING MONTHS FINISHED SECOND WETTEST ON RECORD, TRAILING ONLY THE
SPRING OF 2011.

THE AVERAGE AIR TEMPERATURE FOR MAY WAS 56.1F WHICH IS 0.8F DEGREES
BELOW NORMAL. THIS IS THE SECOND BELOW NORMAL TEMPERATURE MONTH OF
THE SPRING. MUCH OF THE FIRST HALF OF THE MONTH REMAINED BELOW
NORMAL, WITH THE COOLEST DAYS THIS MONTH ON THE 8TH AND 9TH WHEN THE
MERCURY DIPPED TO 34F. DAYS TRENDED ABOVE NORMAL FOR THE END OF THE
MONTH, INCLUDING 4 STRAIGHT DAYS IN THE 70S TO FINISH THE MEMORIAL
DAY WEEKEND AND MONTH. THERE WAS ONE RECORD HIGH MINIMUM RECORD SET,
ON THE 17TH THE THERMOMETER DIPPED ONLY TO 64F, TYING THE RECORD
PREVIOUSLY SET BACK IN 1889.

PRECIPITATION FOR THE MONTH FINISHED AT 6.35 INCHES, WHICH IS ALMOST
THREE INCHES ABOVE NORMAL. THERE WERE THREE DAILY RECORD
PRECIPITATION EVENTS, THIS ON THE HEALS OF THREE DAILY RECORD
PRECIPITATION EVENTS IN APRIL. THERE WERE 5 DAYS WITH THUNDERSTORMS,
WITH EACH EVENT CONTRIBUTING TO THE 7TH WETTEST MAY ON RECORD.
DESPITE THE WET MONTH, THE NUMBER OF DAYS WITH PRECIPITATION (14)
WERE JUST ONE MORE THAN NORMAL (13). NEW PRECIPITATION MARKS WERE
ESTABLISHED ON THE 1ST (1.29"), 4TH (1.37") AND 25TH (1.79").

THE BEGINNING OF THE MONTH BEGAN ON THE STORMY SIDE, WITH NUMEROUS
SEVERE THUNDERSTORMS BRINGING LOCALIZED DAMAGING WIND GUSTS ACROSS
WESTERN NEW YORK. IN ADDITION HEAVY RAIN PASSED ACROSS THE REGION
WITH OVER AN INCH OF RAIN MEASURED AT THE BUFFALO AIRPORT. THIS
RECORDED SETTING EVENT FOLLOWED A DAILY RECORD THAT WAS SET ON THE
LAST DAY OF APRIL. AFTER A FEW DAYS OF COOL WEATHER AND RESPITE FROM
THE RAIN, ANOTHER STORM SYSTEM CUT THROUGH THE OHIO VALLEY AND
PRODUCED ADDITIONAL WIDESPREAD SOAKING RAIN. THIS EVENT PRODUCED YET
ANOTHER DAILY RECORD AT BUFFALO. COOL WEATHER AND CLOUDY DAYS
CONTINUED THROUGH MID-MONTH AS A DEEP UPPER LEVEL LOW REMAINED
STALLED OVER QUEBEC. THE SPRING OF 2017 WAS A STARK CONTRAST TO THE
PREVIOUS SPRING OF 2016 WHICH FEATURED THE ONSET OF DROUGHT
CONDITIONS. LAWNS THIS YEAR REMAINED LUSH AND FLOWERS FLOURISHED
UNDER THE COOL AND DAMP CONDITIONS.

THE FIRST TASTE OF SUMMER THIS MONTH OCCURRED ON THE 17TH AND 18TH
OF THE MONTH. WARM AIR FROM THE SOUTHWEST FLOWED OVER THE EASTERN
GREAT LAKES REGION AND BROUGHT WIDESPREAD 80S, AND A FEW 90F
READINGS. ANOTHER COOL POOL SETTLED OVER WESTERN NEW YORK LATER ON
THE 18TH. AS THESE AIRMASSES CLASHED, SEVERE THUNDERSTORMS AGAIN
FORMED, WITH SOME BEARING HAIL TO 2 INCHES IN DIAMETER ACROSS
SOUTHWESTERN NEW YORK. ANOTHER SLOW MOVING LOW FROM THE SOUTH PASSED
NEAR THE REGION ON THE 25TH, BRINGING AN ALL-DAY RAIN EVENT THAT
YIELDED AN INCH TO TWO INCHES OF RAIN TO WESTERN NEW YORK. THIS
EVENT ALSO BROUGHT A DAILY RECORD OF 1.79 INCHES OF RAIN TO THE
BUFFALO AIRPORT. A WEAK COLD FRONT BROUGHT SOME SHOWERS LATER SUNDAY
AND INTO THE EARLY MORNING HOURS OF MEMORIAL DAY, THE 29TH. MUCH OF
THE RAIN ENDED BY TIME FESTIVITIES BEGAN ON MONDAY.

LAKE ERIE`S WATER TEMPERATURE REMAINED ABOVE NORMAL AND WARMED FROM
46F DEGREES AT THE BEGINNING OF THE MONTH TO 58F DEGREES BY MONTHS
CLOSE. WINDS FOR THE MONTH FINISHED ABOVE NORMAL (+0.4 MPH),
FINISHING WITH AN AVERAGE SPEED OF 10.4 MPH. THE PEAK WIND GUSTS FOR
THE MONTH OCCURRED IN STORMS ON THE 1ST WITH 51 MPH REGISTERED.

IN ALL, AND WHAT HAS BEEN THE THEME THIS SPRING, A WET MONTH LACKING
ANY SIGNIFICANT LENGTHY WARM SPELLS.

&&

THOMAS

$$



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