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CXAK57 PAJK 021321
CLMAJK

Climate Report
NATIONAL WEATHER SERVICE JUNEAU, AK                                  
522 AM AKDT THU JUN 2 2016
................................... 

...The JUNEAU climate summary for the month of May 2016...

Climate normal period 1981 to 2010
Climate record period 1936 to 2016

Weather         Observed          Normal  Depart                      
                 Value   Date(s)  Value   From                        
                                          Normal                      
................................................
Temperature (F)
Record
 High              82   05/27/1947                                     
      
 Low               25   05/01/1972                                    
Highest            79   05/13        70       9                       
Lowest             37   05/11        32       5                       
Avg. Maximum     60.4              56.6     3.8                       
Avg. Minimum     43.3              40.6     2.7                       
Mean             51.8              48.6     3.2                       
Days Max >= 90      0               0.0     0.0                       
Days Max <= 32      0               0.0     0.0                       
Days Min <= 32      0               1.6    -1.6                       
Days Min <= 0       0               0.0     0.0                       

Precipitation (inches)
Record
 Maximum         9.20   1992                                          
 Minimum         0.52   2015                                          
Totals           5.67              3.40    2.27                       
Daily Avg.       0.18              0.11    0.07                       
Days >= .01        16              16.3    -0.3                       
Days >= .10         9               9.3    -0.3                       
Days >= .50         4               1.6     2.4                       
Days >= 1.00        2               0.3     1.7                       
Greatest
 24 Hr. Total    1.87   05/05 to 05/06                                

Snowfall (inches)
Records
 Total            1.2   1964                                          
 24 Hr Total      0.7   05/02/1945 to 05/03/1945                      
 Snow Depth         0                                      
Totals            0.0               0.0     0.0                       
Since 7/1        34.9              86.7   -51.8                       
Snowdepth Avg.      0               0.0     0.0                       
Days >= Trace       0               0.0     0.0                       
Days >= 1.0         0               0.0     0.0                       
Greatest
 Snow Depth         0                                              
 24 Hr Total      0.0                                 

DEGREE_DAYS
HEATING TOTAL     402               508    -106                       
 SINCE 7/1       6931              8036   -1105                       
COOLING TOTAL       0                 0       0                       
 SINCE 1/1          0                 0       0                       

FREEZE DATES
EARLIEST                        09/30                                 
LATEST                          05/12                                 
.................................................

Wind (mph)
Average Wind Speed              7.1
Highest Wind Speed/Direction    32/120    Date  05/17
Highest Gust Speed/Direction    42/110    Date  05/17


Weather Conditions. Number Of Days With 
Thunderstorm              0     Mixed Precip               0
Heavy Rain                0     Rain                       5
Light Rain               19     Freezing Rain              0
Lt Freezing Rain          0     Hail                       0
Heavy Snow                0     Snow                       0
Light Snow                0     Sleet                      0
Fog                      10     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.                                          

$$

...Sixth warmest and wettest May on record for Juneau...

The May average monthly temperature was once again above normal in
Juneau, which marks the 8th month in a row with warmer than normal
conditions. There were three multi-day periods with significantly
warmer than normal daytime highs which coincided with the most pleasant
and driest weather of the month - the 11th through the 15th, the 19th
through the 21st, and the 26th through the 29th. Besides the warmer
than normal highs, mostly clear skies during the second and third week
also produced overnight lows at or below normal. The warmest day of the
month occurred during the particularly warm second week of the month
when the temperature rose to 79 degrees on the 13th. This was a new
record for that date, as was the following day when the temperature
rose to 77 degrees. The coolest night of the month also occurred that
week when the temperature fell to 37 degrees on the night of the 11th. 

May was also significantly wetter than normal and stands in stark
contrast to May of 2015, which was the driest May on record. The wetter
conditions during May of 2016 were aided by significantly warmer than
normal sea surface temperatures in the Gulf of Alaska and a prevailing
jet stream that steered storm systems over the panhandle. The 5.67
inches of rain recorded at the airport was 67 percent above normal,
which is unusual considering that May is usually one of the driest
months for Juneau. In fact, this past May was more like a normal August
in terms of precipitation. One daily precipitation record was set on
May 6th, when 1.56 inches was recorded at the airport. On that same
day, 1.42 inches of rain was recorded downtown and 1.33 inches was
recorded at the weather office on Back Loop Road. 

In spite of the wetter than normal conditions, May recorded only 10
days with fog at the airport - mostly in the first week of the month.
While statistics on fog are harder to quantify, the lack of fog this
past May was typical for late spring and summer. 

$$

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Page Modified: 03 Feb 2008 18:00 UTC
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