Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000 CXUS51 KBUF 060049 CLMBUF CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 607 PM EDT MON JUN 1 2015 ................................... ...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF MAY 2015... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2015 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 89 05/09 85 05/13 LOWEST 34 05/23 37 05/05 AVG. MAXIMUM 73.1 66.5 6.6 66.7 AVG. MINIMUM 52.2 47.4 4.8 48.6 MEAN 62.6 56.9 5.7 57.7 DAYS MAX >= 90 0 0.0 0.0 0 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 3.50 3.46 0.04 3.12 DAYS >= .01 9 14 DAYS >= .10 4 8 DAYS >= .50 1 2 DAYS >= 1.00 1 0 GREATEST 24 HR. TOTAL 2.44 05/31 TO 05/31 SNOWFALL (INCHES) RECORDS TOTAL 7.9 1989 TOTALS 0.0 0.3 -0.3 0.0 SINCE 7/1 112.9 94.7 18.2 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 05/31 TO 05/31 DEGREE_DAYS HEATING TOTAL 158 272 -114 242 SINCE 7/1 6978 6553 425 7097 COOLING TOTAL 91 23 68 23 SINCE 1/1 91 26 65 23 .................................................. WIND (MPH) AVERAGE WIND SPEED 10.0 HIGHEST WIND SPEED/DIRECTION 31/280 DATE 05/27 HIGHEST GUST SPEED/DIRECTION 41/280 DATE 05/27 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM NUMBER OF DAYS FAIR 4 NUMBER OF DAYS PC 20 NUMBER OF DAYS CLOUDY 7 AVERAGE RH (PERCENT) 64 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 3 RAIN 4 LIGHT RAIN 12 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 15 FOG W/VIS <= 1/4 MILE 1 HAZE 6 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...VERY WARM AND DRY MAY... AFTER A COLD START TO SPRING...AND NEAR NORMAL TEMPERATURES IN APRIL...VERY WARM AIR TEMPERATURES RETURNED TO WESTERN NEW YORK IN MAY. IT WAS ALSO A DRY MONTH WITH MEANINGFUL RAINFALL FALLING ON TWO OCCASIONS THROUGH THE MONTH. ABUNDANT SUNNY DAYS...A DRYING GROUND AND A MEAN SOUTHWESTERLY FLOW LED TO THE 5TH WARMEST MAY ON RECORD. THE MEAN TEMPERATURES THIS MONTH WAS 62.6F DEGREES WHICH IS 5.7F DEGREES ABOVE NORMAL. THERE WERE TWO RECORD HIGH TEMPERATURES SET THIS MONTH...FALLING CONSECUTIVELY ON THE 8TH AND 9TH WITH READINGS OF 88F AND 89F RESPECTIVELY. THERE WERE ALSO TWO RECORD WARM MINIMUM TEMPERATURES...ALSO FALLING CONSECUTIVELY ON THE 10TH AND 11TH WITH READINGS OF 67F AND 64F DEGREES RESPECTIVELY. THE 5 CONSECUTIVE DAYS WITHIN THE 80S FROM THE 7TH THROUGH THE 11TH WAS THE EARLIEST STRETCH OF 5 DAYS WITHIN THE 80S FOR BUFFALO. PRECIPITATION THIS MONTH TOTALED 3.50 INCHES WHICH IS A SHADE ABOVE NORMAL. THOUGH MAY`S PRECIPITATION FINISHED NEAR NORMAL...ALMOST THE ENTIRE MONTH WAS DRY AS MOST OF THE RAIN THIS MONTH FELL OVER TWO OCCASIONS THE 10-11TH (0.59") AND THE LAST 26 HOURS OF THE MONTH (2.67"). THE 2.44 INCHES OF RAIN THAT FELL ON THE LAST DAY OF THE MONTH SET A NEW RECORD FOR THE DATE. THE OLD RECORD WAS 1.30 INCHES SET BACK IN 1889. THIS DAILY EVENT WAS ALSO THE SECOND GREATEST CALENDAR RAINFALL EVENT IN THE MONTH OF MAY...TRAILING ONLY THE 3.41 INCHES THAT FELL MAY 19TH 1986. MANY OF MAY`S DAILY TEMPERATURES WERE ABOVE NORMAL WITH 23 DAYS AVERAGING ABOVE NORMAL COMPARED TO 8 DAYS AT OR BELOW NORMAL. THESE WARM TEMPERATURES IN CONJUNCTION WITH ALL THE SUNSHINE AND LACK OF RAIN MADE THIS MONTH A VERY PLEASANT MONTH. THERE WERE TWO NOTABLE WEATHER FEATURES THIS MONTH. THE FIRST WAS A LATE FROST/FREEZE ACROSS WESTERN NEW YORK ON THE MORNING OF THE 23RD. FOLLOWING A COOL AND CLOUDY DAY IN THE LOW 60S...SKIES CLEARED WITH EXCELLENT RADIATIONAL COOLING CONDITIONS. TEMPERATURES DROPPED TO 34F DEGREES SATURDAY MORNING THE 23RD WITH WIDESPREAD FROST ACROSS METRO BUFFALO AND FREEZE CONDITIONS TO AREAS WELL SOUTH OF BUFFALO. ONLY 5 OTHER SPRINGS HAVE HAD A TEMPERATURE OF 34F OR COLDER LATER IN THE SEASON. VEGETATION SPRUNG FORTH IN THE WARM MONTH OF MAY...BUT PROLONGED DRY STRETCHES AND SUNNY DAYS EVENTUALLY STARTED TO DRY THE LOW BRUSH AND GRASSES. THIS DRY PATTERN ENDED ON THE LAST DAY OF THE MONTH WHEN A MOISTURE LADEN SLOW MOVING COLD FRONT MOVED THROUGH THE REGION WITH SIGNIFICANT RAINFALL. SEVERAL WAVES ALONG THIS COLD FRONT BROUGHT OVER TWO INCHES OF RAINFALL THE LAST DAY AND A HALF TO WESTERN NEW YORK...A RAINFALL EVENT THAT WAS WELCOMED EVEN THOUGH THE RAIN FELL ON A WEEKEND. THIS EVENT PRODUCED NO SIGNIFICANT FLOODING AS ANTECEDENT DRY CONDITIONS ALLOWED THE GROUND TO ABSORB A PORTION OF THE RAIN THAT FELL...WITH REMAINING RUNOFF CONTAINED WITHIN ALL CREEKS AND RIVERS. WINDS WERE PREDOMINATELY SOUTHWEST THIS MONTH AND TAME WITH THE STRONGEST GUST JUST 41 MPH. LAKE ERIE`S WATER TEMPERATURE ROSE FROM 39F AT MONTHS START TO 60F BY THE END OF THE MONTH. IN ALL A PLEASANT SPRING MONTH FOR WESTERN NEW YORK. SPRING STATS... SPRING STARTED COOL...WITH AIR TEMPERATURES IN MARCH WELL BELOW NORMAL. AFTER A NEAR NORMAL MONTH IN APRIL TEMPERATURE-WISE THE MONTH OF MAY BROUGHT SUMMER LIKE WARMTH ACROSS WESTERN NEW YORK. IT WAS A DRY SPRING...WITH THE MONTH OF MARCH THE DRIEST OF THE THREE MONTHS. THE TOTAL PRECIPITATION THIS SPRING WAS CONTRARY TO THE PRIOR TWO SPRINGS...WHICH FINISHED WITH ABOVE NORMAL PRECIPITATION. HERE ARE SOME SPRING STATS FOR METEOROLOGICAL SPRING WHICH IS DEFINED AS THE MONTHS OF MARCH...APRIL AND MAY. TEMPERATURE.......... 45.9F (+0.3) PRECIPITATION........ 7.64" (-1.70") SNOW................. 9.9" (-6.0") && THOMAS $$

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