Climatological Report (Monthly)
Issued by NWS

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000
CXAK57 PAJK 030500
CLMASI
CLIMATE REPORT
NATIONAL WEATHER SERVICE JUNEAU, AK
849 PM AKDT FRI AUG 2 2019

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

...THE SITKA CLIMATE SUMMARY FOR THE MONTH OF JULY 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1944 TO 2019

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              88   07/30/1976
 LOW               41   07/05/1945
                        07/04/1945
HIGHEST            73   07/23        72       1
LOWEST             52   07/31        46       6
AVG. MAXIMUM     63.6              60.4     3.2
AVG. MINIMUM     55.5              52.0     3.5
MEAN             59.6              56.2     3.4
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        12.27   1959
 MINIMUM         0.80   2009
TOTALS           3.38              4.12   -0.74
DAILY AVG.       0.11              0.13   -0.02
DAYS >= .01        13              18.5    -5.5
DAYS >= .10        10              10.9    -0.9
DAYS >= .50         1               2.2    -1.2
DAYS >= 1.00        0               0.4    -0.4
GREATEST
 24 HR. TOTAL    0.85   07/28 TO 07/28

DEGREE_DAYS
HEATING TOTAL     158               273    -115
 SINCE 7/1        158               273    -115
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0

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

WIND (MPH)
AVERAGE WIND SPEED              5.1
HIGHEST WIND SPEED/DIRECTION    23/190    DATE  07/22
HIGHEST GUST SPEED/DIRECTION    32/190    DATE  07/22


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       6
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      22     FOG W/VIS <= 1/4 MILE      1
HAZE                      4

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

$$
...A dry and very warm July for Southeast Alaska...

The main impact on weather for the start of July was a strong high
pressure system over the AK Gulf and Panhandle. This resulted in the
continued long string of dry and warm days from the end of June.
Hazy conditions due to smoke from interior Alaska and western
Canadian wild fires and the steering flow around the AK Gulf high
with decreased visibility and low air quality for much of the
panhandle. The Alaska Department of Environmental Conservation
issued an air quality alert through the 12th. A fire weather watch
was issued for July 4th to the 5th by NWS Juneau as well as
fireworks and burn bans issued by multiple SE Alaska communities. As
the high pressure system broke down there was a return to seasonable
wet weather and near normal temperatures for most of the second half
of the month. Not normal was thunderstorm activity over the southern
regions on the 22nd and 23rd and special marine warnings issued for
potential large hail, gusty winds of 40 mph, and frequent lightning
strikes.

Glacial dam releases occurred on two rivers in July. The Salmon
River near Hyder jokulhaup peaked around 27.1 feet on the 13th at 7
am. The Mendenhall Lake/River release from Suicide Basin peaked
around 8.6 feet at 10 pm on the 14th with a second peak on the 16th
of 6.9 feet at 9 pm.

"It`s very hot" was the word spoken by most residents at the start
of the month. Juneau had 14 days at or above 70 with Ketchikan at 7.
New monthly records occurred at Yakutat for warmest average
temperature of 59.6 breaking the old record of 58.9 set in 1930.
Sitka tied the record warmest average temperature of 59.6 last set in
2016. Juneau was the 2nd warmest on record at 60.7, just missing the
record of 61.2 reached in 2018. Single day record for Sitka occurred
on the 23rd for record high temperature of 73. Of note, it was
unusually warm overnight lows more so than daytime highs that caused
the record, or near record, monthly average temperatures.

Precipitation was below normal for most of SE AK for the month.
Juneau was the 5th driest on record at 2.13 inches. An 18 day dry
period for Juneau ended on the 12th when measurable precipitation
finally fell. The exception was Yakutat which was near normal at
7.41 inches, mainly due to a 3 day rainfall event from the 27th to
the 29th of 5.35 inches. Single day record for Sitka occurred on the
28th for rainfall of 0.85 inches. Moderate to extreme drought
conditions continue for the AK Panhandle.

$$


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