Climatological Report (Monthly)
Issued by NWS

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CXAK57 PAJK 011257 CCA
CLMAJK

CLIMATE REPORT
NATIONAL WEATHER SERVICE JUNEAU, AK
430 AM AKDT MON JUN 1 2015

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

...THE JUNEAU CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1943 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              82   05/27/1947
 LOW               25   05/01/1972
                        05/11/1965
                        05/02/1956
HIGHEST            77   05/30        70       7       75  05/16
                        05/29
LOWEST             32   05/05        32       0       33  05/05
AVG. MAXIMUM     65.7              56.6     9.1     62.0
AVG. MINIMUM     42.4              40.6     1.8     42.4
MEAN             54.1              48.6     5.5     52.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               1.6    -0.6        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.20   1992
 MINIMUM         0.84   2004
TOTALS           0.52R             3.40   -2.88     1.67
DAILY AVG.       0.02              0.11   -0.09     0.05
DAYS >= .01         4              16.3   -12.3        9
DAYS >= .10         2               9.3    -7.3        5
DAYS >= .50         0               1.6    -1.6        0
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.31   04/30 TO 05/01           05/30 TO 05/31

SNOWFALL (INCHES)
RECORDS
 TOTAL            1.2   1964
 24 HR TOTAL      0.7   05/02/1945 TO 05/03/1945
 SNOW DEPTH         0   05/31/2002
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1        48.6              86.7   -38.1     97.1
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   05/31 TO 05/31           05/31 TO 05/31

DEGREE_DAYS
HEATING TOTAL     332               508    -176      388
 SINCE 7/1       7097              8036    -939     7772
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0

FREEZE DATES
RECORD
 EARLIEST     08/24/1969
 LATEST       06/13/1965
EARLIEST                        09/30
LATEST                          05/12
..................................................

WIND (MPH)
AVERAGE WIND SPEED              5.9
RESULTANT WIND SPEED/DIRECTION   2/235
HIGHEST WIND SPEED/DIRECTION    23/090    DATE  05/04
HIGHEST GUST SPEED/DIRECTION    32/090    DATE  05/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$

...WARMEST AND DRIEST MAY ON RECORD...

THE MONTH OF MAY WAS VERY DRY AND WARM BREAKING A FEW RECORDS ALONG THE
WAY. THE TOTAL PRECIPITATION MEASURED AT THE JUNEAU INTERNATIONAL AIRPORT
FOR THE MONTH WAS ONLY 0.52 INCHES WHICH IS 2.88 INCHES BELOW NORMAL. THIS
BREAKS THE LOW RAINFALL RECORD OF 0.84 INCHES SET IN 2004. THIS MONTH THE
AIRPORT ALSO BROKE THE RECORD FOR CONSECUTIVE DAYS WITHOUT ANY
PRECIPITATION WITH A STRETCH OF 14 DRY DAYS THAT BEGAN ON MAY 12TH. THE
PREVIOUS LONG DRY STRETCH WAS 12 DAYS SET IN 1996.

THE TEMPERATURES WERE ALSO RECORD SETTING THIS MONTH. MAY HAD 13 DAYS WITH
A HIGH TEMPERATURE EQUAL TO OR GREATER THAN 70 DEGREES. THIS REPLACES THE
PREVIOUS RECORD OF ONLY 8 DAYS SET IN 2010. THESE WARM DAYS LED TO AN
AVERAGE TEMPERATURE OF 54.1 DEGREES WHICH IS 5.5 DEGREES ABOVE NORMAL FOR
MAY. THIS AVERAGE BEATS THE PREVIOUS RECORD OF 52.7 DEGREES SET IN 2005.

THE AVERAGE MAXIMUM TEMPERATURE ALSO SET A NEW RECORD WITH A MONTHLY
AVERAGE OF 65.7 DEGREES. THIS BEATS THE PREVIOUS RECORD OF 63.5 DEGREES
SET IN 2005. IF IT FELT WARM IT IS BECAUSE THE AVERAGE HIGH TEMPERATURE
WAS 9.1 DEGREES ABOVE NORMAL FOR MAY. THE HIGHEST TEMPERATURE FOR THE
MONTH WAS 77 DEGREES OCCURRING ON THE 29TH AND 30TH. DESPITE THE WARM
AVERAGES ONLY 1 DAILY RECORD WAS BROKEN THIS MONTH. THE 77 DEGREES ON THE
30TH BEAT THE OLD RECORD OF 75 DEGREES SET IN 1964.

WINDS FOR THE MONTH WERE PRIMARILY FROM THE SOUTHWEST WITH AN AVERAGE
SPEED OF 5.9 MPH. THE HIGHEST WIND FOR THE MONTH OCCURRED ON THE 4TH WITH
A SPEED OF 32 MPH FROM THE EAST.

GS


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