Issued at 3:11 PM CDT, Wednesday, September 15th, 2010
Low temperature report for Wednesday, September 15th, 2010. Source: NWS Duluth, MN.
International Falls MN: 31 degrees
Hibbing MN: 34 degrees
Ashland WI: 36 degrees
Hayward WI: 37 degrees
Silver Bay MN: 34 degrees
Grand Marais MN: 30 degrees
Ely MN: 28 degrees
Orr MN: 30 degrees
Littlefork MN: 34 degrees
Embarrass MN: 27 degrees
Kabetogama MN: 32 degrees
2 miles South of Tower MN: 30 degrees
Upson WI: 34 degrees
Forecast Discussion for Northeast Minnesota and Northwest Wisconsin
Low pressure of 1008 mb was centered in Eastern South Dakota as of 3 PM with a warm front attached to this low extending east through far Southern Minnesota. Unseasonably cool temperatures and extensive cloudcover was found in our area Today on the north side of this developing storm. Rain has also occurred at times Today with the heavier rainfall confined to southern parts of our area. There has even been a few isolated thunderstorms in southern areas Today. High temperatures were only in the middle 40s to middle 50s across our area Today which is 10-20 degrees below normal for mid-September. Winds Today were out of the east at 5-15 mph with the usual stronger gusts of 20-30 mph occurring closer to Lake Superior.
Today's Upper Level Analysis:
A vigorous short wave trough was tracking east across the Northern Plains and into the Upper Midwest late Today per water vapor satellite imagery with a strong upper level jet >100 knots off to our northeast in Central-Eastern Ontario Province per RUC model analysis. A tight thermal gradient prevailed Today with late day temperatures from 80 degrees in Central Iowa to 45-50 degrees in Northern Minnesota!
Low pressure will deepen to around 1003 mb as it moves from Eastern South Dakota, across the Minnesota/Iowa state line, to Southern Wisconsin by dawn Thursday. Widespread rain along with isolated thunderstorms will continue This Evening in Northwest Wisconsin and Eastcentral Minnesota with areas of lighter rainfall persisting This Evening in Northeast and Northcentral Minnesota. Rain will come to an end from west to east by late Tonight, but some showers could linger in Northwest Wisconsin past 1 AM. Overcast skies This Evening will begin to clear out from northwest to southeast in Northern-Eastern Minnesota, but mostly cloudy skies should continue in Northwest Wisconsin. Patchy frost could develop late Tonight in Northcentral Minnesota and areas of fog could also form in locations that see clearing skies and dimininshing winds. Lows Tonight will be in the 30s and 40s, but some 20s are possible in Northern Minnesota. Winds Tonight will be out of the east or north at 5-15 mph with gusts of 20-30 mph near Lake Superior, especially This Evening.
Thursday and Thursday Night:
Low pressure will reach the Eastern Great Lakes/upper Ohio Valley on Thursday with high pressure briefly building into the Upper Midwest before the next weather system in the form of a cold front moves into Western-Northern Minnesota by late Thursday Night. Partly to mostly cloudy skies are forecast during this period with some showers returning to Northern-Eastern Minnesota by late Thursday Night. Highs Tomorrow will be in the 50s to around 60 degrees with lows Tomorrow Night in the 40s to around 50 degrees. Winds will be out of the north, east or south on Thursday around 20 mph or less with south, east or west winds Tomorrow Night around 20 mph or less.
A cold front will settle south/east through Northern Minnesota and Northwest Wisconsin with a continued chance for showers on Friday, then the upcoming weekend looks generally dry for our local area with cool temperatures continuing. Highs will be in the 50s and 60s on Friday with 40s and 50s for Saturday. Lows will be in the 30s and 40s Friday Night with some 20s possible in Northern Minnesota. Lows Saturday Night will be in the 20s and 30s. The chance for frost and perhaps a hard/killing freeze does exist both Friday and Saturday Nights, although Saturday Night appears to hold the better chance at this point. A new low pressure system looks to take aim at the Upper Midwest as it moves E-NE out of the Western High Plains early next week, this system will give us our next chance for widespread rainfall next Monday and or Tuesday the way it looks now.
5 Day Forecast for Duluth/Superior
.Tonight... Light rain and drizzle ending by Midnight. Mostly cloudy with partial clearing Overnight. Breezy This Evening. Low 40 to 45. Wind east to northeast at 10 to 20 mph with gusts to 30 mph. Wind shifting to the north to northeast at 10 to 20 mph late.
.Thursday... Partly sunny. High 50 to 55. Wind northeast at 10 to 15 mph.
.Thursday Night... Mostly cloudy. Showers possible Overnight. Low 42 to 47. Wind southeast at 5 to 15 mph. Chance of rain 30%.
.Friday... Showers possible. Mostly cloudy. High 58 to 63. Chance of rain 30%.
.Friday Night... Mostly cloudy. Low 40 to 45.
.Saturday... Partly sunny. High 50 to 55.
.Saturday Night... Partly cloudy. Low 35 to 40.
.Sunday... Partly cloudy. High 50 to 55.
Normal High Temperature Today 65 degrees
Normal Low Temperature Today 45 degrees