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Showing posts from March, 2018

20 Year Anniversary of Historical March Tornado Outbreak

20 Year Anniversary of Historical March Tornado Outbreak:
Over the afternoon and early evening of Sunday, March 29, 1998 from 2:30 p m to 6:30 pm a widespread severe weather outbreak occurred across southwestern, south-central, southeastern, and central Minnesota counties.

Over 40 reports of large hail (up to 4.5 inch diameter in Nicollet County) came into the National Weather Service, and severe hail damage was reported to cars and trucks in Rochester.

Dozens of reports of strong winds (over 50 mph) were associated with thunderstorm supercells.

There were 14 confirmed tornadoes, the worst episode of March tornadoes in state history (and there have only been 10 tornado days during March in Minnesota history). Among these 14 tornadoes, an F4 (wind over 207 mph) was on the ground for 77 minutes and traveled 67 miles (Murray to Nicollet County). It was over a mile wide vortex at times. An F3 (winds 158-206 mph) tornado damaged many buildings in St Peter and on the Gustavus Adolphus C…

March is being March

March is being March:
Beginning with the rain and snow storm of the 5th and 6th this month has continued to bring a very typical March weather pattern. There has been plenty of clouds and wind, with a mixture of rain and snow. Temperatures so far are near the monthly average, and so are the precipitation totals.

Over 35 daily snowfall records were tied or brokend with the storm over March 5-6, but generally record setting values of precipitation and temperature have been lacking this month. Minnesota has reported the coldest temperature in the nation on only four dates, three of which were subzero readings from Ely where snow cover has remained relatively deep.

It appears that cooler and wetter than normal conditions will prevail generally for the balance of the month and into the first few days of April. The patience of those Minnesota citizens afflicted with spring fever will be taxed over the coming weeks, as signs of the spring season will be slow to appear.

Weekly Weather…

February Climate Summary

February Climate Summary:
Overall for most areas of Minnesota February was cooler than normal and wetter than normal. Average monthly temperatures ranged from 5 to 7 degrees F cooler than normal. At MSP it ranked as the 28th coolest month of February in the 145 year record. The statewide range in temperature for the month was 55 degrees F at Caledonia (Houston County) and Winona on the 28th and -43 degrees F at Embarrass (St Louis County) on the 5th. Minnesota reported the coldest temperature in the nation 7 times during the month, more than any other state.

Nearly 90 percent of all weather observers reported above normal precipitation for the month, with New Ulm topping the list at 3.33 inches (melted snow equivalent). Several climate stations reported over 2 inches. In terms of snowfall, over 50 Minnesota climate stations reported monthly totals of 20 inches or greater, with parts of Cook and Lake Counties getting over 30 inches. Most of the monthly snowfall came during the…