Alaska Weather A Mix During
Ketchikan cooler than normal
October 04, 2007
(SitNews) - Average September temperatures across Alaska were
just below normal in Southeast, but transitioned to above normal
for areas to the west. The strongest anomalies were recorded
along the North Slope and West Coast, with monthly temperatures
averaging more than 5 degrees Fahrenheit above normal.
The precipitation pattern across
the state was more mixed, with wetter than normal conditions
predominantly in the southern Interior and parts of the southern
coast. Areas in the north and portions of the Panhandle were
drier than normal. The autumnal equinox, or time of year when
daylight and darkness are approximately 12 hours all across the
globe, occurred on Sept. 23rd.
Ketchikan was one of the few
places in which the average temperature was cooler than normal
for September. Though not a strong departure, the temperature
was less than a degree below normal at 52.3 degrees Fahrenheit.
The average high was 58 degrees. The average low was 47 degrees.
The highest and lowest temperatures for the month were 68 degrees
Fahrenheit on Sept. 11 and 36 degrees Fahrenheit on the 28th.
There were a total of 373 heating degree-days for the month,
about 15 more than normal. Ketchikan had only
five dry days, with a total monthly precipitation of 9.97 inches.
This was below normal by a little more than 2 inches. However,
there were four days when the precipitation was more than 1 inch.
Graphic courtesy Alaska
Climate Research Center, Geophysical Institute, UAF
At the Juneau airport, temperatures averaged close to normal
in what was an overall rainy and foggy September. The average
temperature for the month was 49.8 degrees Fahrenheit, just two-tenths
of a degree cooler than normal. The average high and low temperatures
were 55 degrees and 45 degrees, respectively. On Sept. 3, the
high for the month, 66 degrees Fahrenheit, was reported. On Sept.
28, the low of 33 degrees occurred. Heating degree-days were
near normal with 434 units. Precipitation was 1.55 inches more
than normal for September, with 9.09 inches. Only three days
were without rain.
Fairbanks experienced a warmer and wetter than normal September
this year, providing a nice extension to the summer season. Only
on Sept. 21 did the nighttime minimum temperature dip below freezing.
The average temperature was 2.6 degrees Fahrenheit above normal
at 47.1 degrees. The average high and low temperatures were 56
degrees and 38 degrees, respectively. The highest daily temperature
for the month was 70 degrees Fahrenheit on Sept. 12, while the
lowest was 25 degrees on the 22nd. Owing to the relative warmth,
heating degree-days totaled 533 units, about 80 less than normal.
Precipitation was more than the normal September total, with
1.58 inches. This was a departure of almost half an inch. No
snowfall was recorded at the Fairbanks International Airport,
though snow did occur at locations in the hills.
September brought warm and wet conditions to Big Delta this year.
The mean monthly temperature was 1.9 degrees Fahrenheit above
normal at 46.3 degrees. The average high and low temperatures
for the month were 55 degrees and 38 degrees, respectively. On
Sept. 12, the high for the month, 71 degrees, was observed. On
Sept. 27, the low of 26 degrees occurred. Heating degree-days
were about 70 units less than normal at 620. Precipitation totaled
2.28 inches, more than half of which occurred in one day. On
Sept. 16, 1.25 inches was observed. The monthly total is more
than an inch above average for September.
Anchorage had a wet and mild September overall. There were 4.3
inches of precipitation observed at the Ted Stevens Anchorage
International Airport, which is 1.43 inches above average for
the month. Temperatures averaged 50.5 degrees Fahrenheit, a positive
departure of 2.3 degrees. The average high temperature was 57
degrees and the average low was 44 degrees, both a little above
normal. On Sept. 5 and 6, the high for the month, 64 degrees
Fahrenheit, was observed. On Sept. 17, the low of 35 degrees
occurred. Heating degree-days were below normal for September,
due to the warmth, at 430 units.
Barrow had its second warmest September on record this year,
just a tenth of a degree shy of the record set in 1998. The average
temperature was 37.6 degrees Fahrenheit, which is 6.5 degrees
warmer than normal. Two record high temperatures were set: 60
degrees on Sept. 11 and 58 degrees on Sept. 13. Both set records
for their respective dates. The 60-degree-high on the 11th was
in fact the high for the month. The low, 28 degrees Fahrenheit,
occurred on Sept. 22. As would be expected from the near record
warmth, heating degree-day units were 200 below average at 814.
Precipitation totaled 0.34 inch (liquid water equivalent), about
half of normal for September, and it came mostly in the form
of rain. Snowfall totaled just 0.4 inch, which is almost 5 inches
below normal. At a time when Arctic sea ice is normally at its
farthest distance from Barrow's coast, this year it is at a record
minimum. Sea ice extent in this part of the Arctic has retreated
well north of the Alaskan and Russian sectors of the Arctic.
Conditions in Nome were much warmer than normal this year. They
were wetter, too. The temperature departure was 5.2 degrees Fahrenheit
from normal, with a monthly average of 47.8 degrees. In general,
nighttime lows were much warmer than normal, averaging 44 degrees
Fahrenheit, and daytime highs were also warmer than normal, averaging
52 degrees. The high and low temperatures for the month were
61 degrees on Sept. 4 and 33 degrees on the 29th. Precipitation
totaled 3.84 inches, which is 1.33 inches more than normal for
September. Due to the warmth, heating degree-days were about
150 units below normal at 510.
September was rather wet in King Salmon this year, with a monthly
total precipitation of 6.1 inches. This made the month the 4th
wettest September on record. There were only three dry days during
the month, but no daily precipitation total was more than an
inch. Temperatures averaged 2 degrees Fahrenheit warmer than
normal, with a mean monthly temperature of 49.6 degrees Fahrenheit.
The average high and low temperatures were 56 degrees and 44
degrees, respectively. On Sept. 1, the monthly high of 66 degree
Fahrenheit occurred. On the 29th, the low of 31 degrees occurred.
With the relative warmth, heating degree-days were about 70 units
below normal at 452.
Source of News:
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This information consists of
preliminary climatological data that was compiled at the Alaska
Climate Research Center, Geophysical Institute, University of
Climate Research Center, Geophysical
Institute, University of Alaska Fairbanks
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