Climatological Report (Monthly)
Issued by NWS Juneau, AK

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000
CXAK57 PAJK 061255
CLMAJK
NATIONAL WEATHER SERVICE JUNEAU AK
347 AM AKST FRI NOV 06 2020

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

...THE JUNEAU CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2020...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1936 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             63   10/01/2018
 LOW              11   12/31/1999
HIGHEST           57   10/01         55       2
LOWEST            20   10/24         25      -5
AVG. MAXIMUM    46.6               47.0    -0.4
AVG. MINIMUM    36.3               37.8    -1.5
MEAN            41.4               42.4    -1.0
DAYS MAX >= 90     0                0.0     0.0
DAYS MAX <= 32     0                0.1    -0.1
DAYS MIN <= 32    11                6.1     4.9
DAYS MIN <= 0      0                0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       20.43   1936
 MINIMUM        2.59   2016
TOTALS          7.13               8.63   -1.50
DAILY AVG.      0.23               0.28   -0.05
DAYS >= .01       20               23.9    -3.9
DAYS >= .10       10               18.2    -8.2
DAYS >= .50        5                6.1    -1.1
DAYS >= 1.00       3                1.4     1.6
GREATEST
 24 HR. TOTAL   1.63   10/31 TO 10/31

SNOWFALL (INCHES)
RECORDS
 TOTAL          15.6   1956
 SNOW DEPTH        7   10/31/1956
TOTALS           0.7                0.8    -0.1      0.0
SINCE 7/1        0.7                0.8    -0.1
SNOWDEPTH AVG.     0                                   0
DAYS >= TRACE      2                0.6     1.4        0
DAYS >= 1.0        0                0.3    -0.3        0
GREATEST
 SNOW DEPTH        T

DEGREE DAYS
HEATING TOTAL    723                701      22
 SINCE 7/1      1655               1684     -29
COOLING TOTAL      0                  0       0
 SINCE 1/1         1                  2      -1

FREEZE DATES
EARLIEST                        09/15
LATEST                          05/06
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
HIGHEST WIND SPEED/DIRECTION    38/120    DATE  10/04
HIGHEST GUST SPEED/DIRECTION    47/110    DATE  10/04


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       8
LIGHT RAIN               23     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     SLEET                      1
FOG                      16     FOG W/VIS <= 1/4 MILE      5
HAZE                      1

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

$$

...Dry and Cool October 2020...

What is usually a wet month, October ended with below normal
precipitation. When reflecting back on the month, this may seem
misleading as the month began with multiple rounds of precipitation.
Areas throughout the panhandle saw 24 hour rainfall amounts of up to
2 inches on October 2nd. By October 4th another storm had impacted
the northern and central panhandle dropping nearly 4 inches of rain
in 42 hours in Yakutat. At this time, it looked as if October was on
track to receive near normal precipitation. Normal monthly
accumulations for our four climate sites include Yakutat Airport
21.98 inches, Juneau Airport 8.63 inches, Sitka Airport 12.95
inches, and Ketchikan Airport with 19.22 inches. Heading into the
second week, a drier pattern began to develop. With waves of
scattered showers followed by periods of sunny skies, precipitation
accumulations began to drop below normal. This trend continued
through mid October.

Temperatures for the month hovered around normals with a steady
decreasing trend. Although, by October 20th, building high pressure
causing clear skies allowed for a period of below normal
temperatures. This allowed for overnight temperatures to drop and a
few records were broken. On October 21st, Juneau Airport broke their
low temperature record of 26F degrees (1970, 1985, 1991) reaching
24F degrees. Sitka followed on October 25th reaching 28F degrees
breaking the old record of 30F degrees (1991).

At this time of year, temperatures are on a steady downward trend as
the sun angle decrease and daylight hours follow. It is at this time
when people around Southeast Alaska start to ponder on the upcoming
winter season. A word begins to come up in every conversation, and
that word is "Snow". On average, SE Alaska doesn`t see snow until
early November but getting snow during October is not uncommon.
Lucky for all the snow lovers, October 19th provided the the first
measurable snow of the season for portions of the central and
northern panhandle of 0.2 to 1.0 inches followed by additional
snowfall later in the month.

At the end of the month, a stormy weather pattern developed.
Multiple storms with strong moisture support tracked across the
panhandle. Each of these storms produced 24hr rainfall amounts
anywhere between 1 to 5 inches of rainfall. On October 31st Sitka
broke its 24hr rainfall amount of 1.44 inches (2014) getting 1.79
inches. Juneau also got in on the action breaking its old record of
0.98 inches (1969) after getting 1.63 inches. Overall, the month had
impactful storms that produced strong accumulations but without a
steady wet pattern, climate sites wrapped up the month with rainfall
deficits. Ketchikan -11.02 inches, Yakutat -6.37 inches, Sitka -0.35
inches, and Juneau with -1.50 inches.

$$


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