Issued at 3:22 PM CDT, Wednesday, April 21st, 2010
…Fire Danger remains Very High across all of Northern Minnesota and Northwest Wisconsin Today per DNR website.
Note: Today marks the 6th day in a row with-out sunspots which is the longest streak so far in 2010. Source: Spaceweather.com
Weather History:
On this date in 1990, a record high temperature of 76 degrees occurred at Duluth, MN.
On this date in 1991, a record low temperature of 18 degrees occurred at Duluth, MN.
Note: Big temperature changes of around 30-40+ degrees occurred across Northern Minnesota and Northwest Wisconsin between Tuesday’s high temperature and the low temperature This Morning. Here are some of the more notable temperature changes that occurred. 1st number represents the high temperature on Tuesday. 2nd number represents the low temperature from This Morning. 3rd number represents the temperature change between the high and low.
Duluth MN: 72/32=40 degree temperature drop
Brainerd MN: 75/35=40 degree temperature drop
Hibbing MN: 73/26=47 degree temperature drop
Silver Bay MN: 73/30=43 degree temperature drop
Eveleth MN: 72/28=44 degree temperature drop
Embarrass MN: 72/25=47 degree temperature drop
Forecast Discussion for Northeast Minnesota and Northwest Wisconsin
Today’s Weather:
Tuesday’s cold front was located over Iowa This Afternoon while high pressure of 1018 mb was centered across the Northwestern part of Lake Superior. A chilly airmass was in place Today, especially near Lake Superior where Afternoon temperatures have struggled to get out of the mid/upper 30s, the rest of our area saw highs in the upper 40s and 50s Today. 850 mb temperatures as of 3 PM ranged from +1 to -3 degrees C from southwest to northeast across our area. Winds Today were out of the north or east at 5-15 mph with stronger winds up to 20-25 mph occurring near Lake Superior. Low clouds which formed late last night and lingered through This Morning near Lake Superior burned off over all but areas of Ashland/Iron Counties Wisconsin This Afternoon, the rest of our area saw mainly sunny skies Today.
Today’s 500 mb analysis:
Northwest flow aloft covered the Upper Midwest Today/Northeast U.S., along with Central-Eastern parts of Canada per water vapor satellite imagery. A large upper level low (546 meters) covered Central Nevada and Eastern parts of California with widespread 90-150 meter 12 hour 500 mb height falls occurring Today across the Southern Rockies/Southwest U.S. per RUC model analysis.
Tonight through Thursday Night:
High pressure will be in control of our weather during this period as it remains centered to our north/east. Mostly clear skies are forecast Tonight with partly cloudy conditions for Tomorrow and Tomorrow Night. Lows Tonight will fall into the 20s and 30s with some teens possible in the typical cold spots. Areas of frost are likely by dawn. Highs Tomorrow will be in the 50s and 60s but it will be cooler near Lake Superior. Lows Tomorrow Night will be in the 30s to around 40 degrees. North or east winds will continue Tonight under 20 mph with south or east winds Tomorrow and Tomorrow Night generally under 20 mph.
Extended Forecast:
Dry weather will continue Friday and Friday Night across Northern Minnesota and Northwest Wisconsin with highs Friday and Saturday in the 50s and 60s, but it will be cooler near Lake Superior. Lows Friday Night and Saturday Night will be in the 30s and 40s. Strong upper level/surface low pressure which was moving toward the Central Rockies Today will move out onto the Central Plains by Friday before shifting east/northeast this weekend. A few of the models Today show some rain shifting north affecting portions of our area this weekend, while others remain dry. With high pressure remaining to our N/NE this weekend it would appear that the majority of the rain associated with this strong Spring storm will pass to our south…But Southern parts of our area, generally from Brainerd, Hayward, and Park Falls could see some light rain at times from Saturday into Sunday.
By late next week (April 29th-May 1st) the GFS and EUROPEAN models crank out a fairly vigorous storm system which tracks from the Rockies into the Plains. How far north the precipitation gets from this potential storm will depend on how far north the low pressure system tracks. The 12z GFS model from Today seems way overdone on the strength of this system, in fact if the GFS were to verify, then we could be looking at a rain turning to snow scenario for parts of our area sometime next Friday or Saturday!
5 Day Forecast for Duluth/Superior
.Tonight… Mostly clear. Areas of frost late. Low 25 to 30. Wind east at 10 to 20 mph, decreasing to 5 to 15 mph.
.Thursday… Areas of frost early. Mostly sunny. High 53 to 58 but cooler near Lake Superior. Wind east to southeast at 10 to 15 mph.
.Thursday Night… Partly cloudy. Low 35 to 40. Wind southeast at 5 to 15 mph.
.Friday… Partly cloudy. High 58 to 63 but cooler near Lake Superior.
.Friday Night… Partly cloudy. Low 38 to 43.
.Saturday… Mostly cloudy. High 51 to 56 but cooler near Lake Superior.
.Saturday Night… Mostly cloudy. Low 35 to 40.
.Sunday… Considerable cloudiness. High 50 to 55 but cooler near Lake Superior.
Normal High Temperature Today 52 degrees
Normal Low Temperature Today 31 degrees
Tim
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