164  
CXUS51 KBUF 052236  
CLMROC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BUFFALO NY  
541 AM EST FRI DEC 1 2017  
   
...............................
 
 
   
..THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 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 80 11/02/1933  
LOW 1 11/30/1875  
HIGHEST 66 11/28 73 11/18  
11/02  
LOWEST 20 11/10 27 11/12  
AVG. MAXIMUM 48.8 48.0 0.8 54.0  
AVG. MINIMUM 32.2 33.0 -0.8 36.5  
MEAN 40.5 40.5 0.0 45.2  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 1 1.4 -0.4 0  
DAYS MIN <= 32 17 14.8 2.2 9  
DAYS MIN <= 0 0 0.0 0.0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 7.72 1927  
MINIMUM 0.33 1904  
TOTALS 4.13 2.94 1.19 2.60  
DAYS >= .01 16 16  
DAYS >= .10 8 7  
DAYS >= .50 1 2  
DAYS >= 1.00 1 0  
GREATEST  
24 HR. TOTAL 1.65 11/05 TO 11/05 11/02 TO 11/03  
11/03 TO 11/03  
11/03 TO 11/03  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 24.9 1996  
TOTALS 2.6 7.3 -4.7 15.0  
SINCE 7/1 2.6 7.4 -4.8 15.9  
SNOWDEPTH AVG. 0 MM MM 1  
DAYS >= 1.0 1 2.3 -1.3 2  
GREATEST  
SNOW DEPTH 1 11/10 12 11/21  
24 HR TOTAL 1.2 11/10 TO 11/10 11/03 TO 11/03  
11/03 TO 11/03  
11/03 TO 11/03  
 
DEGREE_DAYS  
HEATING TOTAL 729 735 -6 585  
SINCE 7/1 1091 1368 -277 978  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 655 539 116 978    
................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 9.5  
HIGHEST WIND SPEED/DIRECTION 32/210  
HIGHEST GUST SPEED/DIRECTION 43/210 DATE 11/05  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.80  
NUMBER OF DAYS FAIR 1  
NUMBER OF DAYS PC 13  
NUMBER OF DAYS CLOUDY 16  
 
AVERAGE RH (PERCENT) 73  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 2 MIXED PRECIP 0  
HEAVY RAIN 2 RAIN 11  
LIGHT RAIN 17 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 1  
HEAVY SNOW 0 SNOW 4  
LIGHT SNOW 9 SLEET 0  
FOG 17 FOG W/VIS <= 1/4 MILE 1  
HAZE 0  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
   
..UNSETTLED NOVEMBER
 
 
A CONSTANT FLOW OF PACIFIC AIR BOTTLED COLDER AIR WELL TO THE NORTH  
THIS MONTH, WITH THE ONE TRUE, BRIEF SURGE OF ARCTIC AIR MID-MONTH  
PRODUCING THE FIRST CALENDAR DAY INCH OF SNOW AT THE ROCHESTER  
AIRPORT. THERE WERE SEVERAL SOAKING RAINFALL EVENTS THROUGH THE  
MONTH THAT BROUGHT NOVEMBER'S TOTAL PRECIPITATION TO OVER AN INCH  
ABOVE NORMAL.  
 
THE MONTHLY TEMPERATURE AVERAGED 40.5F WHICH IS EXACTLY NORMAL, AND  
WAS THE SECOND MONTH THIS YEAR THAT FINISHED EXACTLY NORMAL. THERE  
WAS ONE BRIEF ARCTIC BLAST THIS MONTH, THIS ON THE 10-11TH, THAT  
DROPPED TEMPERATURES TO NEAR NORMAL. THE FIRST 32F READING OF THE  
COOL SEASON OCCURRED ON NOVEMBER 7TH. THIS MADE FOR 212 DAYS OF  
ABOVE FREEZING DAYS...WHICH IS THE 2ND LONGEST STREAK (216/1938).  
 
PRECIPITATION TOTALED 4.13 INCHES FOR THE MONTH. MUCH OF THIS  
PRECIPITATION OCCURRED OVER THE 2ND THROUGH THE 6TH, INCLUDING THE  
GREATEST ACCUMULATION THIS MONTH OF 1.65" ON THE 5TH. THERE WERE 16  
DAYS WITH MEASURABLE PRECIPITATION, 1 DAY GREATER THAN NORMAL. THERE  
WERE ALSO 4 DAYS WITH MEASURABLE SNOW...THE SAME TOTAL OF DAYS AS  
LAST NOVEMBER THOUGH NOVEMBER 2016 TOTALED 15.0 INCHES OF SNOW VS.  
2.6" NOVEMBER 2017.  
 
THE MONTH OF NOVEMBER CONTINUED THE WET PATTERN FROM THE END OF  
OCTOBER, WITH 6 CONSECUTIVE DAYS OF RAIN CREATING A SOGGY GROUND  
ACROSS WESTERN NEW YORK. HIGH PRESSURE THEN BROUGHT COOLER, BUT MUCH  
DRIER WEATHER FROM THE 7TH THROUGH THE MORNING OF THE 9TH. A SHARP  
COLD FRONT CROSSED WESTERN NEW YORK LATER ON THE 9TH, AND USHERED IN  
THE COLDEST AIR OF THE WINTER SEASON THUS FAR FOR THE 10TH AND 11TH.  
THIS COLD AIRMASS ALSO PRODUCED THE FIRST CALENDAR DAY INCH OF SNOW  
AT THE ROCHESTER AIRPORT ON THE 10TH.  
 
COOL AND UNSETTLED WEATHER REMAINED ACROSS WESTERN NEW YORK MID-  
MONTH. THE FIRST LAKE EFFECT SNOW EVENT OCCURRED ON SUNDAY THE 19TH  
THROUGH MONDAY THE 20TH. BEHIND A COLD FRONT, LAKE EFFECT SNOW BEGAN  
THROUGH THE MORNING HOURS SUNDAY EAST OF LAKE ERIE, WHILE OFF LAKE  
ONTARIO, THE LAKE EFFECT SNOW BECAME HEAVIEST MONDAY MORNING WELL TO  
THE EAST OF ROCHESTER, WITH UP TO A FOOT OF SNOW FALLING OVER THE  
SOUTHERN TUG HILL REGION. THIS EVENT PRODUCED 1.1 INCHES OF SNOW ON  
THE 19-20TH IN ROCHESTER. THE LAST WEEK OF THE MONTH FINISHED WITH  
6 OF 7 DAYS ABOVE TEMPERATURE NORMAL, INCLUDING 66F ON THE 28TH WITH  
GUSTY SOUTHERLY WINDS, THAT BROUGHT NOVEMBER'S AVERAGE TEMPERATURE UP  
TO EXACTLY NORMAL.  
 
WINDS AVERAGED NEAR NORMAL THIS MONTH EVEN THOUGH THERE WERE NO HIGH  
WIND EVENTS FOR THE MONTH. THE HIGHEST GUST WAS 43 MPH ON THE 5TH.  
 
IN ALL A COOL, UNSETTLED MONTH FEATURING LITTLE SNOW.  
 

 
 
THOMAS  
 

 
 
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