052  
CXAK58 PACD 020039  
CLMCDB  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE ANCHORAGE, AK  
336 PM AKST MON JAN 1 2018  
   
...............................
 
 
   
..THE COLD BAY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1942 TO 2017  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 54 12/11/1990  
12/24/1973  
LOW -9 12/29/1950  
HIGHEST 50 MM MM 50  
LOWEST 13 MM MM 15  
AVG. MAXIMUM 38.6 35.6 3.0 37.6  
AVG. MINIMUM 28.1 26.6 1.5 28.6  
MEAN 33.4 31.1 2.3 33.1  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 2 7.2 -5.2 5  
DAYS MIN <= 32 21 21.4 -0.4 20  
DAYS MIN <= 0 0 0.0 0.0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM MM MM  
MINIMUM MM MM  
TOTALS 4.63 4.46 0.17 5.67  
DAILY AVG. 0.15 0.14 0.01 0.18  
DAYS >= .01 23 23.6 -0.6 29  
DAYS >= .10 13 11.7 1.3 18  
DAYS >= .50 1 2.2 -1.2 3  
DAYS >= 1.00 1 0.7 0.3 0  
GREATEST  
24 HR. TOTAL 1.92 12/22 TO 12/22 12/15 TO 12/16  
12/09 TO 12/09  
12/09 TO 12/09  
STORM TOTAL MM MM  
(MM/DD(HH)) MM 12/16(00) TO 12/16(00)  
12/09(00) TO 12/09(00)9  
12/09(00) TO 12/09(00)9  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL MM MM  
24 HR TOTAL MM  
SNOW DEPTH MM MM  
TOTALS 20.8 12.6 8.2 15.1  
SINCE 7/1 23.0 25.2 -2.2 16.9  
SNOWDEPTH AVG. 2 3 -1 1  
DAYS >= TRACE 19 14.1 4.9 24  
DAYS >= 1.0 4 4.9 -0.9  
GREATEST  
SNOW DEPTH 10 12/22 8 12/11  
24 HR TOTAL 12.9 12/22 TO 12/22 12/09 TO 12/09  
12/09 TO 12/09  
12/09 TO 12/09  
STORM TOTAL MM MM  
(MM/DD(HH)) MM  
 
DEGREE_DAYS  
HEATING TOTAL 970 1051 -81 980  
SINCE 7/1 3693 4071 -378 3330  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 0 0 0 0  
 
FREEZE DATES  
RECORD  
EARLIEST MM  
LATEST MM  
EARLIEST MM  
LATEST MM    
......................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 14.3  
RESULTANT WIND SPEED/DIRECTION 2/171  
HIGHEST WIND SPEED/DIRECTION 53/180 DATE 12/18  
HIGHEST GUST SPEED/DIRECTION 60/110 DATE 12/14  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.70  
NUMBER OF DAYS FAIR 4  
NUMBER OF DAYS PC 15  
NUMBER OF DAYS CLOUDY 12  
 
AVERAGE RH (PERCENT) 86  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 2 RAIN 10  
LIGHT RAIN 24 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 1 SNOW 1  
LIGHT SNOW 18 SLEET 0  
FOG 25 FOG W/VIS <= 1/4 MILE 2  
HAZE 3  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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