Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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091 CXUS51 KBUF 060204 CCA CLMBUF CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 1203 PM EST MON JAN 1 2018 ................................... ...CORRECTED MONTHLY SNOWFALL... ...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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 74 12/03/1982 LOW -10 12/25/1980 HIGHEST 53 12/05 58 12/26 LOWEST -1 12/28 9 12/16 12/15 AVG. MAXIMUM 30.4 36.1 -5.7 36.2 AVG. MINIMUM 20.4 24.1 -3.7 26.1 MEAN 25.4 30.1 -4.7 31.2 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 18 10.6 7.4 9 DAYS MIN <= 32 27 24.3 2.7 23 DAYS MIN <= 0 2 0.5 1.5 0 PRECIPITATION (INCHES) RECORD MAXIMUM 8.71 1990 MINIMUM 0.69 1943 TOTALS 2.93 3.89 -0.96 4.06 DAYS >= .01 19 19 DAYS >= .10 11 12 DAYS >= .50 1 2 DAYS >= 1.00 0 0 GREATEST 24 HR. TOTAL 0.57 12/22 TO 12/23 11/30 TO 12/01 SNOWFALL (INCHES) RECORDS TOTAL 82.7 2001 TOTALS 33.7 27.4 6.3 30.1 SINCE 7/1 33.9 36.2 -2.3 SNOWDEPTH AVG. 3 4 -1 3 DAYS >= 1.0 14 6.5 7.5 6 GREATEST SNOW DEPTH 7 12/31 13 12/17 12/26 12/25 24 HR TOTAL 5.8 12/15 TO 12/16 DEGREE_DAYS HEATING TOTAL 1221 1082 139 1040 SINCE 7/1 2336 2415 -79 2010 COOLING TOTAL 0 0 0 0 SINCE 1/1 603 544 59 939 .................................................. WIND (MPH) AVERAGE WIND SPEED 10.7 HIGHEST WIND SPEED/DIRECTION 40/240 HIGHEST GUST SPEED/DIRECTION 55/240 DATE 12/19 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM NUMBER OF DAYS FAIR 0 NUMBER OF DAYS PC 9 NUMBER OF DAYS CLOUDY 22 AVERAGE RH (PERCENT) 75 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 0 RAIN 2 LIGHT RAIN 3 FREEZING RAIN 0 LT FREEZING RAIN 2 HAIL 1 HEAVY SNOW 3 SNOW 10 LIGHT SNOW 23 SLEET 1 FOG 22 FOG W/VIS <= 1/4 MILE 2 HAZE 9 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...AN ACTIVE DECEMBER WITH SNOW AND COLD... DECEMBER FEATURED PLENTY OF IMPACTFUL WINTER WEATHER EVENTS FOR WESTERN NEW YORK WITH ACTIVE LAKE EFFECT SNOWS AND MULTIPLE SURGE`S OF ARCTIC AIRMASSES. AFTER A SLOW START TO THE WINTER SEASON, WINTERS FURY RAPIDLY INCREASED WITH MANY LAKE EFFECT SNOW EVENTS...LEADING TO AN ABOVE NORMAL SNOWFALL MONTH. TWO ARCTIC SURGES BROUGHT THE TEMPERATURE FOR THE MONTH TO BELOW NORMAL. THE TEMPERATURE AVERAGED 25.4F THIS MONTH WHICH IS OVER FOUR AND A HALF DEGREES BELOW NORMAL. IT WAS THE COLDEST DECEMBER SINCE THE YEAR 2000. THE MONTH CAN BE BROKEN DOWN INTO FOUR DISTINCT PATTERNS. THE FIRST 6 DAYS AVERAGED ABOVE NORMAL...INCLUDING TWO DAYS IN THE LOWER 50S ON THE 4TH AND 5TH. THE FIRST ARCTIC SURGE OF THE MONTH THEN LASTED THROUGH MID-MONTH, DROPPING OVERNIGHT TEMPERATURES BELOW FREEZING EACH NIGHT. A BRIEF THAWING SPELL OCCURRED FROM THE 18TH THROUGH THE 23RD...INCLUDING TWO DAYS IN THE LOWER 40S ON THE 18TH AND 19TH. THEREAFTER ARCTIC AIR POURED OVER THE GREAT LAKES REGION, PROGRESSIVELY LOWERING DAYTIME HIGHS FROM THE LOWER 30S TO THE SINGLE DIGITS BY MONTH`S CLOSURE. THERE WERE 14 DAYS THAT REACHED THE FREEZING MARK, 7 LESS THAN NORMAL, AND VIRTUALLY ALL DURING THE FIRST HALF OF THE MONTH. THE HIGH TEMPERATURE OF 9F ON THE LAST DAY OF THE MONTH WAS THE FIRST SINGLE DIGIT HIGH TEMPERATURE IN DECEMBER SINCE 1989. PRECIPITATION TOTALED 2.93 INCHES FOR THE MONTH, WHICH IS ABOUT AN INCH BELOW NORMAL. MOST OF THE EVENTS WERE SNOW, WITH JUST ONE RAIN EVENT ON THE 5TH-6TH, AND ONE FREEZING RAIN EVENT ON THE 23RD. SNOW TOTALED ABOVE NORMAL FOR THE MONTH, WITH 33.7 INCHES OF SNOW RECORDED. THIS IS THE GREATEST SNOW AMOUNT IN DECEMBER SINCE DECEMBER OF 2008. THERE WERE 18 DAYS WITH MEASURABLE SNOW, AND 14 DAYS WITH AT LEAST AN INCH OF SNOW. THESE 14 DAYS TIES A DECEMBER RECORD WITH THE DECEMBERS OF 2000 AND 1977. THOUGH THERE WERE NO MAJOR SNOW EVENTS AT THE BUFFALO AIRPORT AS WIND FLOW TENDED TO BE AN UNFAVORABLE NORTHWEST DIRECTION, THERE WERE 6 LAKE EFFECT SNOW EVENTS OVER THE COURSE OF A BUSY MONTH. THIS BROUGHT GREATER THAN NORMAL SNOW TOTALS ACROSS SKI COUNTRY AND THE WESTERN SOUTHERN TIER. THE FREEZING RAIN EVENT ON THE 22ND-23RD BROUGHT A GLAZE TO A TENTH OF AN INCH OF ICE TO ELEVATED SURFACES. PERSISTENT SNOWS FROM THE 23RD TO 25TH LED TO A WHITE CHRISTMAS WITH 7 INCHES OF SNOW ON THE GROUND. LAKE ERIE FELL TO 33F BY THE END OF THE MONTH, WITH ICE FORMING ALONG THE SHORELINE AND IN THE BUFFALO HARBOR. THE STRONGEST WIND GUST WAS 55 MPH ON THE 19TH. IN ALL A WESTERN NEW YORK WINTER MONTH WITH COLD AND SNOW. && THOMAS $$

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