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Showing posts from November, 2012

Preliminary November climate summary

Preliminary November climate summary Most observers reported average monthly temperatures for November that ranged from 2 to 4 degrees F warmer than normal, with the larger positive departures in temperatures coming in southern counties. Extremes for the month ranged from -11 degrees F at Fosston (Polk County) on the 26th to 75 degrees F on the 10th at Rochester, Amboy, and Winnebago. The warm day on the 10th also brought extremely rare November tornadoes to the state. These storms were reported from Burnsville, Eagan, Mendota Heights and Mahtomedi, and were the 2nd latest autumn tornadoes in Minnesota history (there was a tornado near Maple Plain back on November 16, 1931).

Nearly all observers reported below normal precipitation for the month of November, except for a few spots in northeastern Minnesota where reports of 1.50 to 2.50 inches occurred. Grand Marais topped the list with 2.76 inches. Northern Minnesota observers also measured snowfall this month. Some…

Record warmth this week, then temperature crash

Record warmth this week, then temperature crash From Saturday, November 17th to Thanksgiving (Nov 23) temperatures averaged 12 to 25 degrees F warmer than normal around the state, with frequent sunny skies, similar to last year's spell of mild weather over November 23-26, 2011. Some new record high temperatures were reported around the state over Sunday through Thursday, including:

54 degrees F at Hibbing on November 18, 2012

53 degrees F at Hibbing on November 19, 2012
54 degrees F at International Falls on November 19, 2012
55 degrees F at Pokegama Dam (tied record), and Bigfork on November 19, 2012
56 degrees F at Cass Lake and Brainerd on November 19, 2012
57 degrees F at Grand Rapids on November 19, 2012

60 degrees F at Sherburn, Chaska, and Wells on November 20, 2012
63 degrees F at Marshall on November 20, 2012
62 degrees F at Forest Lake on November 20, 2012
57 degrees F at Brainerd on November 20, 2012

Numerous high temperature records were set on November 21st, too many …

Roller coaster weekend

Roller coaster weekend A low pressure system brought strong southeastern winds to the state late Saturday, November 10th (Anniversary of the sinking of the Edmund Fitzgerald on Lake Superior in 1975), raising both temperatures and dewpoints to record-setting levels. MSP airport set a new high dewpoint record with a reading of 56 degrees F (breaking the form record of 55 degrees F in 1909) at 4:00 pm in the afternoon and also set a new high temperature record with a reading of 69 degrees F. It was the warmest November 10th since 1999. Several other Minnesota communities set record high temperatures that day as well including 75 degrees F at Rochester and Winnebago, 74 degrees F at Waseca, Fairmont (tied record), Albert Lea, and Wells, 72 degrees F at Zumbrota, Grand Meadow, and Preston, 71 degrees at Red Wing, 70 degrees F at Redwood Falls (tied record), 68 degrees F at Minnesota City, and 67 degrees F at La Crescent.

By evening thunderstorms had developed in many area…

Highlights of the Kuehnast Mini-Climate School

Highlights of the Kuehnast Mini-Climate School The 20th Anniversary Kuehnast Endowment Event was held at the St Paul Campus on Thursday, November 8th. The format was a "mini-climate school" with presentations on three important topics: Canada's Climate; Urban Climates; and Severe Weather in a Changing Climate. Some highlights are described below:

David Phillips from Environment Canada asked the critical question: "Is climate changing faster than we can adapt?" Certainly temperatures are changing across Canada: Western provinces are warming more significantly than eastern provinces, especially in winter and spring, while polar regions are warming remarkably in fall and winter. The number of unusually warm nights is increasing, and glaciers for the most part are retreating. Extreme weather is in evidence, especially in the variability of wet versus dry growing seasons for Canada's farmers. Episodes of very strong winds are increasing in …

Climate Trivia or Climate Change?

Climate Trivia or Climate Change? According to Pete Boulay of the Minnesota State Climatology Office for many southern climate stations in Minnesota, including the Twin Cities and Rochester this year produced a climate anomaly worth noting. For the first time in history the average temperature for March (2012) was warmer than the average temperature for October (2012). This is a statistical singularity, but with changes in the extent of polar ice, and changing upper air patterns over North America perhaps this will happen again.

October Climate Summary Most Minnesota observers reported mean October temperatures that were 1 to 2 degrees F cooler than normal, breaking a long string of months with above normal temperatures. Extremes for the month ranged from 87 degrees F at Wheaton on the 1st to just 8 degrees F at Babbitt on the 31st.

Precipitation for October was generally less than normal, except for some northern and southeastern counties where surplus precipitation…