Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000 CXUS51 KBUF 022143 CLMROC CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 1009 AM EST THU FEB 1 2018 ................................... ...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2018 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 74 01/25/1950 LOW -17 01/16/1994 HIGHEST 60 01/12 56 01/12 01/11 LOWEST -6 01/07 7 01/08 01/07 01/06 AVG. MAXIMUM 33.1 31.7 1.4 37.3 AVG. MINIMUM 16.9 17.6 -0.7 25.5 MEAN 25.0 24.7 0.3 31.4 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 16 15.9 0.1 10 DAYS MIN <= 32 27 27.5 -0.5 21 DAYS MIN <= 0 5 2.6 2.4 0 PRECIPITATION (INCHES) RECORD MAXIMUM 8.05 1878 MINIMUM 0.52 1921 TOTALS 3.11 2.41 0.70 2.75 DAYS >= .01 18 16 DAYS >= .10 7 6 DAYS >= .50 2 3 DAYS >= 1.00 0 0 GREATEST 24 HR. TOTAL 0.98 01/12 TO 01/12 01/17 TO 01/18 01/24 TO 01/24 01/24 TO 01/24 SNOWFALL (INCHES) RECORDS TOTAL 61.3 2004 TOTALS 32.9 28.2 4.7 11.8 SINCE 7/1 70.2 57.4 12.8 57.0 SNOWDEPTH AVG. 5 4 1 0 DAYS >= 1.0 7 8.8 -1.8 4 GREATEST SNOW DEPTH 12 01/14 5 01/25 24 HR TOTAL 9.6 01/13 TO 01/13 01/24 TO 01/24 01/24 TO 01/24 01/24 TO 01/24 DEGREE_DAYS HEATING TOTAL 1233 1251 -18 1036 SINCE 7/1 3526 3704 -178 3049 COOLING TOTAL 0 0 0 0 SINCE 1/1 0 0 0 0 ..................................................... WIND (MPH) AVERAGE WIND SPEED 11.5 HIGHEST WIND SPEED/DIRECTION 38/260 HIGHEST GUST SPEED/DIRECTION 46/270 DATE 01/23 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.80 NUMBER OF DAYS FAIR 0 NUMBER OF DAYS PC 9 NUMBER OF DAYS CLOUDY 22 AVERAGE RH (PERCENT) 71 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 0 RAIN 4 LIGHT RAIN 7 FREEZING RAIN 1 LT FREEZING RAIN 1 HAIL 0 HEAVY SNOW 0 SNOW 7 LIGHT SNOW 22 SLEET 1 FOG 20 FOG W/VIS <= 1/4 MILE 1 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...A TEMPERATURE ROLLER COASTER FOR JANUARY... JANUARY STARTED OUT THE SAME WAY THAT DECEMBER ENDED, COLD, WITH THE FIRST SEVEN DAYS OF THE MONTH RUNNING BELOW NORMAL. TEMPERATURES BEGAN TO WARM TO MUCH ABOVE NORMAL AFTER THE FIRST WEEK OF JANUARY WHICH HELPED TO CONTRIBUTE TO ICE JAM FLOODING THAT OCCURRED IN AREAS EAST AND WEST OF THE ROCHESTER AREA. FOLLOWING THE WARM SPELL, AN ARCTIC AIRMASS AND WIDESPREAD SNOWFALL AFFECTED THE AREA FOR THE MIDDLE OF THE MONTH. THIS SECOND COLD STRETCH THAT SPANNED THE MIDDLE OF THE MONTH WAS THEN FOLLOWED BY ANOTHER LONGER STRETCH OF MOSTLY ABOVE NORMAL TEMPERATURES TO END THE MONTH. FOR THE FIRST WEEK OF THE MONTH THE AVERAGE TEMPERATURE RANGED BETWEEN 8 TO 23 DEGREES BELOW NORMAL. THE END OF THIS COLD STRETCH MARKED 15 CONSECUTIVE DAYS OF AT OR BELOW NORMAL TEMPERATURES THAT BEGAN ON CHRISTMAS EVE. ALL BUT TWO OF THESE DAYS SAW AVERAGE TEMPERATURES THAT WERE 8 DEGREES OR MORE BELOW NORMAL. DURING THIS STRETCH OF WELL BELOW NORMAL TEMPERATURES, MOST OF THE CREEKS AND RIVERS FROZE OVER WITH THICK ICE. AS THE REGION WARMED UP WITH TEMPERATURES WELL ABOVE NORMAL COMBINED WITH HEAVY RAIN, THE THREAT FOR FLOODING BEGAN TO UNFOLD ON JANUARY 11TH. A STRONG COLD FRONT MOVED THROUGH THE AREA DURING THE MORNING AND AFTERNOON ON JANUARY 12TH, HELPING TO USHER IN ANOTHER COLD AIR MASS THAT BROUGHT TEMPERATURES BACK BELOW NORMAL ONCE AGAIN. COLDER THAN NORMAL TEMPERATURES AFFECTED THE REGION FROM THE AFTERNOON ON JANUARY 12TH THROUGH JANUARY 18TH. ON JANUARY 19TH THE ROCHESTER AREA BEGAN A WARMING TREND THAT WOULD LAST THROUGH THE REST OF THE MONTH, WITH ALL BUT A FEW DAYS DURING THIS 13 DAY STRETCH AVERAGING ABOVE NORMAL FOR TEMPERATURES. FOR THE MONTH OF JANUARY, THE AVERAGE TEMPERATURE WAS 25.0 DEGREES FAHRENHEIT, WHICH IS 0.3 DEGREES ABOVE THE NORMAL OF 24.7 DEGREES. THE COLDEST DAY OF THE MONTH WAS ON JANUARY 6TH, WHEN THE AVERAGE TEMPERATURE WAS ONLY 2 DEGREES AND THE MAXIMUM TEMPERATURE ONLY REACHED 4 DEGREES FOR THE DAY. THE COLDEST MINIMUM TEMPERATURE FOR THE MONTH OCCURRED ON JANUARY 7TH, WHEN THE LOW TEMPERATURE DROPPED TO -6 DEGREES. THE WARMEST TEMPERATURE OF THE MONTH OCCURRED ON JANUARY 11TH AND 12TH, WHEN THE MAXIMUM TEMPERATURE FOR EACH DAY REACHED 60 DEGREES, WHICH SET A NEW RECORD FOR THE DAY ON JANUARY 12TH FOR THE ROCHESTER AIRPORT. JANUARY STARTED OFF FAIRLY QUIET FOR THE ROCHESTER AREA. A THREE DAY STRETCH OF LAKE EFFECT SNOW DID AFFECT THE AREA FROM JANUARY 4TH THROUGH THE 6TH WITH 2.4 TO 3.4 INCHES OF SNOW FALLING EACH OF THE THE THREE DAYS. ON JANUARY 11TH AND 12TH, FLOODING DUE TO BOTH ICE JAMS AND HEAVY RAINFALL WERE REPORTED IN SEVERAL COUNTIES WEST AND EAST OF THE ROCHESTER AREA, WITH SOME FLOODING ALSO OCCURRING IN THE ROCHESTER AREA. JANUARY 12TH, STARTED OUT WARM AND RAINY UNTIL A STRONG COLD FRONT MOVED THROUGH THE AREA TRANSITIONING THE AREA FROM WARM AND RAINY CONDITIONS TO COLD AND SNOWY CONDITIONS. HEAVY SNOW FELL ACROSS THE REGION AS AN EXPANSIVE AREA OF LOW PRESSURE MOVED ALONG THE APPALACHIAN MOUNTAINS AND THROUGH THE NORTHEAST. THE COMBINATION OF RAIN AND SNOW WATER EQUIVALENT TOTALED TO 0.98 INCHES OF LIQUID PRECIPITATION ON JANUARY 12TH. DURING THIS TIME THE ROCHESTER AIRPORT RECEIVED 12.8 INCHES OF NEW SNOW FROM JANUARY 12TH THROUGH THE 13TH. FROM JANUARY 14TH THROUGH 29TH, NO MORE THAN ONE INCH OF SNOW FELL ON ANY CALENDER DAY DURING THIS TIME. WARM TEMPERATURES AND RAINFALL THAT AMOUNTED TO JUST OVER THREE TENTHS OF AN INCH TOTAL ON JANUARY 22ND AND 23RD HELPED TO MELT WHAT LITTLE SNOW WAS LEFT ON THE GROUND IN THE ROCHESTER AREA. ON JANUARY 29TH AND 30TH, AN INVERTED TROUGH ASSOCIATED WITH A COASTAL LOW BROUGHT SNOW TO MOST OF WESTERN NEW YORK FROM ROCHESTER ON WEST WITH THE ROCHESTER AIRPORT PICKING UP 6.7 INCHES OF SNOW, WITH 6.4 INCHES FALLING ON JANUARY 29TH. AT THE ROCHESTER AIRPORT, THE MONTH OF JANUARY 2018 ENDED UP WITH 32.9 INCHES OF SNOW, WHICH IS 4.7 INCHES ABOVE THE NORMAL OF 28.2 INCHES. WITH THE ADDITION OF THE SNOWFALL FROM JANUARY, THE SEASONAL SNOWFALL TOTAL IS NOW 70.2 INCHES, WHICH IS 12.8 INCHES ABOVE THE NORMAL 57.4 INCHES THE ROCHESTER AIRPORT WOULD HAVE THROUGH THE MONTH OF JANUARY. FOR THE MONTH OF JANUARY THE TOTAL LIQUID EQUIVALENT PRECIPITATION AT THE ROCHESTER AIRPORT WAS 3.11 INCHES, WHICH IS 0.70 INCHES ABOVE THE NORMAL OF 2.41 INCHES. FOR THE ROCHESTER AIRPORT IN JANUARY 2018, FOUR DIFFERENT RECORDS WERE BROKEN. JANUARY 5TH SET A RECORD FOR COLDEST MAXIMUM TEMPERATURE WHEN THE TEMPERATURE ONLY REACHED 5 DEGREES, BREAKING THE OLD RECORD SET BACK IN 1896 OF 9 DEGREES FOR THE DAY. ON JANUARY 11TH, A RECORD WARM MINIMUM TEMPERATURE WAS SET AS THE LOW TEMPERATURE ONLY DROPPED TO 44 DEGREES, THUS BREAKING THE PREVIOUS RECORD OF 38 DEGREES SET IN 2017. THE ONE AND ONLY RECORD HIGH TEMPERATURE FOR THE MONTH WAS SET ON JANUARY 12TH, WHEN THE TEMPERATURE REACHED 60 DEGREES, BREAKING THE OLD RECORD OF 58 DEGREES SET IN 2013. ONE RECORD PRECIPITATION EVENT OCCURRED FOR THE MONTH WHEN THE COMBINATION OF RAIN AND LIQUID WATER EQUIVALENT FROM SNOW TOTALED 0.98 INCHES ON JANUARY 12TH, WHICH BROKE THE OLD RECORD OF 0.83 INCHES OF PRECIPITATION ON THE SAME DATE IN 1909. THE LAKE ONTARIO TEMPERATURE FLUCTUATED BETWEEN A MAXIMUM TEMPERATURE OF 37 DEGREES FAHRENHEIT AND A MINIMUM OF 34 DEGREES. IN ALL, A MOSTLY AVERAGE MONTH OF JANUARY FOR WESTERN NEW YORK. && WELCH $$

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