Climatological Report (Monthly)
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000
CXAK57 PAJK 022042
CLMASI
CLIMATE REPORT
NATIONAL WEATHER SERVICE JUNEAU, AK
1229 PM AKDT SAT JUN 2 2018

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

...THE SITKA CLIMATE SUMMARY FOR THE MONTH OF MAY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1944 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              80   05/29/1964
 LOW               29   05/06/2002
                        05/05/1965
HIGHEST            57   05/17
LOWEST             36   05/03
                        05/02
AVG. MAXIMUM     51.2              53.1    -1.9
AVG. MINIMUM     42.4              42.4     0.0
MEAN             46.8              47.8    -1.0
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.2    -0.2
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.04   1982
 MINIMUM         0.34   2015
TOTALS           6.05              4.23    1.82
DAILY AVG.       0.20              0.14    0.06
DAYS >= .01        19              17.5     1.5
DAYS >= .10        17              10.8     6.2
DAYS >= .50         4               2.6     1.4
DAYS >= 1.00        1               0.6     0.4
GREATEST
 24 HR. TOTAL    1.03   05/28 TO 05/28

DEGREE_DAYS
HEATING TOTAL     557               535      22
 SINCE 7/1       6628              6817    -189
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0

FREEZE DATES
EARLIEST                        10/27
LATEST                          04/16
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
HIGHEST WIND SPEED/DIRECTION    30/180    DATE  05/21
HIGHEST GUST SPEED/DIRECTION    40/190    DATE  05/21


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       7
LIGHT RAIN               25     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      23     FOG W/VIS <= 1/4 MILE      2
HAZE                      2

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

$$
...May 2018 was much wetter and slightly warmer than normal...

Most of Southeast Alaska recorded near or above normal May
precipitation values, continuing the upward trend of accumulated
rainfall since mid-April. Even with the above normal precipitation
values, total accumulations for the year-to-date still remain below
normal. The southern panhandle is still listed as abnormally dry in
the United States Drought Monitor.

While May is typically one of the drier months of the year, a few
weather patterns atypical for this time of year brought heavier
rainfall. Two notable atmospheric river events during the first part
of May impacted the northern zones, while heavier showers associated
with gulf low pressure systems spread across the panhandle in the
latter part of May. Several stations recorded top ten wettest values
for May, including Yakutat which received near record amounts of
precipitation. Multiple daily precipitations were broken on six
separate days.

Temperatures also trended warmer than normal. This was mainly due to
minimum temperatures being above normal, rather than daytime
maximums which were near normal on average. The exception was Sitka
which saw below normal maximum temperatures. The southern zones,
including Ketchikan, experienced warmer than normal temperatures May
5-19 during which time dry conditions persisted. A shift in the
weather pattern there dropped max temperatures below normal May 20-
30 along with the increased rainfall. A few record high temperatures
were set on May 9th and May 18th.

$$



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