Monthly Climate Summary - Juneau


CXAK57 PAJK 021359
CLMYAK
CLIMATE REPORT
NATIONAL WEATHER SERVICE JUNEAU, AK                                  
458 AM AKST TUE JAN 2 2018
................................... 

...THE YAKUTAT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1917 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR'S         
                 VALUE   DATE(S)  VALUE   FROM    VALUE               
                                          NORMAL                      
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              52   MM                                            
 LOW                3   12/15/2016                                    
HIGHEST            51   12/10        MM      MM                       
                        12/09                                         
                        12/08                                         
LOWEST              5   12/28        MM      MM                       
AVG. MAXIMUM     36.5              35.0     1.5                       
AVG. MINIMUM     26.5              24.3     2.2                       
MEAN             31.5              29.6     1.9                       
DAYS MAX >= 90      0               0.0     0.0                       
DAYS MAX <= 32     11               9.2     1.8                       
DAYS MIN <= 32     17              22.9    -5.9                       
DAYS MIN <= 0       0               0.5    -0.5                       

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        35.21   1989                                          
 MINIMUM         3.51   1922                                          
TOTALS          16.49             16.28    0.21                       
DAILY AVG.       0.53              0.53    0.00                       
DAYS >= .01        22              22.5    -0.5                       
DAYS >= .10        17              18.3    -1.3                       
DAYS >= .50         9               9.6    -0.6                       
DAYS >= 1.00        7               5.6     1.4                       
GREATEST
 24 HR. TOTAL    3.09   12/07 TO 12/07                                

SNOWFALL (INCHES)
RECORDS
 TOTAL           91.6   1957                                          
 24 HR TOTAL       MM                                                 
 SNOW DEPTH        70   12/30/1957                                    
TOTALS           11.3              23.2   -11.9                       
SINCE 7/1        38.1              43.9    -5.8                       
SNOWDEPTH AVG.      2                 7      -5                       
DAYS >= TRACE       9              12.8    -3.8                       
DAYS >= 1.0         6               7.7    -1.7        5              
GREATEST
 SNOW DEPTH         7   12/31                                         
 24 HR TOTAL      3.1   12/31 TO 12/31                                

DEGREE_DAYS
HEATING TOTAL    1029              1096     -67                       
 SINCE 7/1       3703              3982    -279                       
COOLING TOTAL       0                 0       0                       
 SINCE 1/1          0                 0       0                       

FREEZE DATES
EARLIEST      12/01             09/16                                 
LATEST                          05/25                                 
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
HIGHEST WIND SPEED/DIRECTION    31/140    DATE  12/11
HIGHEST GUST SPEED/DIRECTION    49/130    DATE  12/10


WEATHER CONDITIONS. NUMBER OF DAYS WITH 
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      13
LIGHT RAIN               17     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               10     SLEET                      1
FOG                      24     FOG W/VIS <= 1/4 MILE      3
HAZE                      1                                           
                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

$$
...December 2017 was warm and wet, and then cold and dry... 

The cold and snowy Winter weather of late November did not last long 
into December this year. By the third of the month, daytime highs 
and overnight lows were already above normal and getting warmer. 
Daily high temperature records were set on most days in many places 
through the 14th of the month. During this time, Southeast Alaska 
received nearly of its monthly precipitation as well and virtually 
all of it as rain rather than snow except for the highways. The 
seond half of the month was cold and dry as a result of another 
strong and stationary high pressure system that set up over western 
Canada. Strong outflow winds dominated the weather, particularly 
across the far norhtern inner channels. By the 18th of the month, 
daily highs and lows were below normal and falling...and 
falling...and falling. Temperature continued to trend downward until 
the last day of the month. No low temperature records were set at 
the 4 primary climate sites, but several locations reported record 
low temperatures on the 28th, the 29th, and the 30th of the month. 
On New Year's Eve, a strong weather front and a significantly warmer 
low level air mass pushed in from the west. Snow began falling early 
in the evening along the outer coast and had pushed across the 
panhandle early in the night. But the new snow was too little too 
late to make any significant difference to the monthly snow totals 
across the panhandle. This was especially so in the Capital City, 
which recorded its second lowest December snow total on record.

$$

 in from the west. Snow began falling early 

in the evening along the outer coast and had pushed across the 

panhandle early in the night. But the new snow was too little too 

late to make any significant difference to the monthly snow totals 

across the panhandle. This was especially so in the Capital City, 

which recorded its second lowest December snow total on record.



$$

CLIMATE REPORT

NATIONAL WEATHER SERVICE JUNEAU, AK                                  

458 AM AKST TUE JAN 2 2018

................................... 



...THE KETCHIKAN      ASOS CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...



CLIMATE NORMAL PERIOD 9999 TO 9999

CLIMATE RECORD PERIOD 9999 TO 9999



WEATHER         OBSERVED          NORMAL  DEPART                      

                 VALUE   DATE(S)  VALUE   FROM                        

                                          NORMAL                      

................................................

TEMPERATURE (F)

RECORD

 HIGH              MM   MM                                            

 LOW               MM   MM                                            

HIGHEST            58   12/11        MM      MM                       

LOWEST              7   12/30        MM      MM                       

AVG. MAXIMUM     40.4                MM      MM                       

AVG. MINIMUM     31.7                MM      MM                       

MEAN             36.0                MM      MM                       

DAYS MAX >= 90      0                MM      MM                       

DAYS MAX <= 32      4                MM      MM                       

DAYS MIN <= 32     15                MM      MM                       

DAYS MIN <= 0       0                MM      MM                       



PRECIPITATION (INCHES)

RECORD

 MAXIMUM           MM   MM                                            

 MINIMUM           MM   MM                                            

TOTALS          13.51                MM      MM                       

DAILY AVG.       0.44                MM      MM                       

DAYS >= .01        20                MM      MM                       

DAYS >= .10        16                MM      MM                       

DAYS >= .50         8                MM      MM                       

DAYS >= 1.00        5                MM      MM                       

GREATEST

 24 HR. TOTAL    4.15   12/09 TO 12/09                                



DEGREE_DAYS

HEATING TOTAL     891                MM      MM                       

 SINCE 7/1       2614                MM      MM                       

COOLING TOTAL       0                MM      MM                       

 SINCE 1/1         26                MM      MM                       



FREEZE DATES

EARLIEST                        MM                                    

LATEST                          MM                                    

.................................................



WIND (MPH)

AVERAGE WIND SPEED              7.1

HIGHEST WIND SPEED/DIRECTION    32/120    DATE  12/09

HIGHEST GUST SPEED/DIRECTION    42/130    DATE  12/14





WEATHER CONDITIONS. NUMBER OF DAYS WITH 

THUNDERSTORM              0     MIXED PRECIP               0

HEAVY RAIN                2     RAIN                       9

LIGHT RAIN               19     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       0

LIGHT SNOW                7     SLEET                      0

FOG                      22     FOG W/VIS <= 1/4 MILE      0

HAZE                      0                                           

                                                                    

-  INDICATES NEGATIVE NUMBERS.                                      

R  INDICATES RECORD WAS SET OR TIED.                                

MM INDICATES DATA IS MISSING.                                       

T  INDICATES TRACE AMOUNT.                                          



$$

...December 2017 was warm and wet, and then cold and dry... 



The cold and snowy Winter weather of late November did not last long 

into December this year. By the third of the month, daytime highs 

and overnight lows were already above normal and getting warmer. 

Daily high temperature records were set on most days in many places 

through the 14th of the month. During this time, Southeast Alaska 

received nearly of its monthly precipitation as well and virtually 

all of it as rain rather than snow except for the highways. The 

seond half of the month was cold and dry as a result of another 

strong and stationary high pressure system that set up over western 

Canada. Strong outflow winds dominated the weather, particularly 

across the far norhtern inner channels. By the 18th of the month, 

daily highs and lows were below normal and falling...and 

falling...and falling. Temperature continued to trend downward until 

the last day of the month. No low temperature records were set at 

the 4 primary climate sites, but several locations reported record 

low temperatures on the 28th, the 29th, and the 30th of the month. 

On New Year's Eve, a strong weather front and a significantly warmer 

low level air mass pushed in from the west. Snow began falling early 

in the evening along the outer coast and had pushed across the 

panhandle early in the night. But the new snow was too little too 

late to make any significant difference to the monthly snow totals 

across the panhandle. This was especially so in the Capital City, 

which recorded its second lowest December snow total on record.



$$