Tuesday, April 26, 2011

4/26/11: Tuesday's Weather Report

Issued at 4:04 PM CDT, Tuesday, April 26th, 2011

*WINTER WEATHER ADVISORY*

Winter Weather Advisory is in effect until 10 AM CDT Thursday for the following counties in Northwest Wisconsin:  Bayfield...Ashland...and Iron.  Some cities included in the advisory are:  Port Wing WI...Bayfield WI...Iron River WI...Cable WI...Ashland WI...Butternut WI...Upson WI...Gile WI...and Hurley WI.

Impacts:  A mixture of rain and snow, turning to snow at times will continue through Thursday Morning.  Total snowfall accumulations of 2-5" can be expected by Wednesday Evening.  The greatest amounts will occur in higher elevated areas.  Roads will become snow and slush covered in some areas.  Expect areas of difficult travel.  Slow down and use caution while driving.

High temperature report for Monday, April 25th, 2011.  Source:  NWS Duluth, MN.

Duluth, MN:  65 degrees
International Falls, MN:  64 degrees
Brainerd, MN:  66 degrees
Hibbing, MN:  68 degrees
Ashland, WI:  69 degrees
Hayward, WI:  67 degrees
Sky Harbor, MN:  63 degrees
Silver Bay, MN:  66 degrees
Orr, MN:  68 degrees
Bigfork, MN:  68 degrees
Cloquet, MN:  66 degrees
Superior, WI:  70 degrees
Phillips, WI:  68 degrees
Cass Lake, MN:  68 degrees
Littlefork, MN:  66 degrees
Embarrass, MN:  66 degrees
Finland, MN:  66 degrees
Upson, WI:  67 degrees

Weather headlines:

-Wet, gray, and cool thru Wednesday
-Several inches of wet slushy snow still expected Tonight and Wednesday Morning for parts of the area
-Slight improvement in the weather for Thursday
-Next storm expected to hit Friday Night with lingering impacts into the weekend

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

A tale of two seasons across our area Today with spring like warmth with highs in the 50s in Northern Minnesota with temperatures in the 40s, falling to the 30s thanks to evaporative cooling in Northwest Wisconsin and Northeast-Eastern Minnesota.  Strong low pressure of 994mb was centered in Southern Wisconsin This Afternoon with widespread precipitation occurring from Northwest Wisconsin back through Eastcentral and Northeast Minnesota.  Rain was the main precipitation type thru mid-Afternoon, but colder air was spreading southwest into areas near Lake Superior which has caused the rain to mix with and change to snow, some moderate to heavy snow bursts have been occurring in some spots late This Afternoon.  Winds Today were very strong near Lake Superior where 20-35 mph sustained east-northeast wind speeds have occurred Today with gusts to 45 mph.  Winds farther inland were in the 10-25 mph range Today.

Today's Upper Level Analysis:

Broad 500mb trough was in place from the Rockies to the Upper Midwest with a strong upper level low spinning slowly north from Iowa per water vapor satellite imagery.  A powerhouse jet stream >120 knot winds per RUC model analysis extended from Oregon, southeast to Western Texas and it's this energy which will help fuel another major severe weather outbreak for the Southern Plains, Tennessee and Ohio Valley regions Tonight.  Note:  418 preliminary severe weather reports/40 tornadoes occurred in parts of the Southern Plains, Tennesse and Southern Ohio Valley regions on Monday, April 25th, 2011 per SPC.

Tonight:

Surface low will weaken to around 998mb as it heads into Northeast Wisconsin while a strong upper level low lifts north into Western Wisconsin-Eastern Minnesota Tonight.  Expect rain and snow in Northwest Wisconsin and Northeast-Eastcentral Minnesota Tonight with precipitation becoming all snow at times in some locations.  850mb temperatures are forecast to drop to between -2 and -4 degrees C Tonight which is sufficiently cold enough to support frozen precipitation, temperatures near the surface will be marginal, however, except for higher elevated areas in Northwest Wisconsin and Northeast Minnesota.  Northern Minnesota, or along and north of a Blackduck, Bigfork, to Crane Lake, MN line should remain generally dry Tonight.  Low temperatures will be in the 30s with north or east winds at 10-25 mph with higher gusts near Lake Superior.

Wednesday and Wednesday Night:

Slow moving surface and upper level area of low pressure will remain over the Western Great Lakes/Upper Midwest during this period while a stronger area of low pressure heads northeast from the Arklatex.  Lingering rain and snow showers are expected throughout the area Tomorrow and Tomorrow Night.  Highs will be in the 30s and 40s with lows mainly in the 30s.  Winds will be out of the north, east, or northwest at 10-25 mph.

Note:  Widespread precipitation totals of 0.10"-0.25" are expected by Wednesday Night for Northern Minnesota with a corridor of 0.25"-0.75" for Northwest Wisconsin and also in Eastern-Northeast Minnesota.

Note:  Snowfall accumulations of 1-3" are expected by Wednesday in Northeast Minnesota and Northwest Wisconsin with localized greater amounts of 3-5" in higher elevated areas, about 10-15 miles from Lake Superior.

Extended Forecast:

Low pressure will move into Eastern Canada on Thursday with still a lingering threat for some rain or snow showers in Northeast Minnesota and Northwest Wisconsin especially Thursday Morning.  A period of dry weather is expected Thursday Night through Friday Evening before the next storm system moves into the Upper Midwest this weekend.  Another round of rain can be expected in our area from late Friday Night into Saturday Evening with lingering showers Saturday Night into Sunday.  High temperatures will be in the 40s to lower 50s on Thursday with lows Thursday Night in the 30s.  Highs on Friday will reach the 50s and 60s, but it will be cooler near Lake Superior.  Lows Friday Night will be in the 30s and 40s.

5 Day Forecast for Duluth/Superior

.Tonight...  Snow mixing at times with drizzle and rain in higher elevated areas.  A mixture of rain, drizzle, and snow closer to Lake Superior.  Breezy.  Low 31 to 34.  Wind northeast at 15 to 25 mph with some higher gusts.  Total snowfall accumulations of 1-3".

.Wednesday...  Rain and snow showers.  Snow accumulations under 1".  Mostly cloudy.  High 35 to 40.  Wind northeast at 15 to 25 mph.

.Wednesday Night...  Mostly cloudy.  Rain or snow showers.  Low 31 to 34.  Wind north at 10 to 20 mph.

.Thursday...  Rain or snow showers possible early.  Partly sunny.  High 45 to 50.

.Thursday Night...  Partly cloudy.  Low 30 to 35.

.Friday...  Partly cloudy.  High 55 to 60 but turning cooler near Lake Superior.

.Friday Night...  Increasing cloudiness.  Rain possible Overnight.  Low 38 to 42.

.Saturday...  Occasional rain.  Mostly cloudy.  High 42 to 45.

Normal temperatures for Today

High:  55
Low:  33

Sunrise Tomorrow:  6:01 AM CDT
Sunset Tomorrow:   8:13 PM CDT

Tim