Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

What a difference a month makes! After a very cold and winter like October, November 2009 ended up much above normal across the Northern Plains, including South Dakota and west-central Minnesota. In fact, every day in November averaged above normal at Aberdeen, Pierre, and Watertown!

Below are a few other interesting temperature facts at Pierre, Aberdeen, and Watertown. Tables listing the top 10 warmest November’s on record are also provided below. A more detailed temperature and precipitation summary from November 2009 will be provided within the next couple of days.

At Pierre:

The average daily temperature of 41.1 was +7.7F above normal and ranked as the 5th warmest on record.
The average high temperature of 54.3 was the 5th warmest on record.
The average low temperature of 27.8 was the 10th warmest on record.

At Aberdeen:

The average daily temperature of 38.2 was +8.9 above normal and ranked as the 4th warmest on record.
The average high temperature of 50.5 was the 7th warmest on record.
The average low temperature of 25.9 was the 8th warmest on record.

At Watertown:

The average daily temperature of 38.6 was +10.3F above normal and ranked as the 4th warmest on record.
The average high temperature of 49.1 was the 7th warmest on record.
The average low temperature of 28.1 was the 4th warmest on record.

Top Ten Warmest Average November Temperatures in Pierre (1933-2009)

	Value	Year(s)
1	44.4	1999
2	43.2	1949
3	42.1	1939
4	41.3	2001
5	41.1	2009, 1954
7	40.7	1980
8	40.3	1981, 1962
10	39.6	1998

Top Ten Warmest Average November Temperatures in Aberdeen (1893-2009)

	Value	Year(s)
1	40.7	1923
2	39.5	2001
3	38.7	1999
4	38.2	2009
5	38.0	1949
6	37.6	1981
7	37.5	1913
8	37.4	1917
9	36.9	1954
10	36.1	1980

Top Ten Warmest Average November Temperatures in Watertown (1893-2009)

	Value	Year(s)
1	40.4	2001
2	39.6	1999
3	39.1	1899
4	38.6	2009
5	38.5	1917
6	37.5	1923
7	37.3	1913
8	37.0	1949
9	36.9	1987, 1939

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Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

Final Numbers on the Mild November 2009