Monday, April 4, 2011

4/4/11: Monday's Weather Report

Issued at 4:50 PM CDT, Monday, April 4th, 2011

Note:  A strong area of low pressure passed through Iowa on Sunday, this system brought a mix bag of precipitation to Northern Minnesota and Northwest Wisconsin.  Most locations saw rain or a mixture of rain and wet snow which turned over to all snow for brief periods of time, but accumulations were minimal for most areas.  The exception to all this was in the higher terrain areas adjacent to Lake Superior where several inches of wet slushy snow accumulated on Sunday.  This storm also brought very warm air north into Southern Minnesota with 70 degree temperatures at Albert Lea with many other cities topping the 50 and 60 degree mark from Minneapolis on south.  The final component to this storm was the severe weather, 319 reports of large hail and damaging winds occurred Sunday and Sunday Night across portions of the Central Plains with some of that severe weather extending north to Southern Wisconsin per SPC storm report page.

Snowfall report for Sunday and Monday, April 3rd-4th, 2011.  Source:  NWS Duluth, Minnesota.

23 miles north-northwest of Grand Marais, MN (Cook county)  7.0" reported at Rockwood Lodge on the Gunflint Trail.
Loon Lake, MN (Cook county)  3.5"
4 miles east of Island Lake, MN (St. Louis county)  3.4"
2 miles southeast of Finland, MN (Lake county)  3.0"
Cloquet, MN (Carlton county)  3.0"
Silver Bay, MN (Lake county)  2.5"
Upson, WI (Iron county)  2.5"
6 miles north-northwest of Duluth, MN (St. Louis county)  2.4" measured at Rice Lake Township
Gile, WI (Iron county)  2.3"
2 miles south of Tower, MN (St. Louis county)  1.4"

5 miles northwest of Duluth, MN (St. Louis county)  3.1" measured at the NWS.

Note:  April is off to a snowy start at Duluth, Minnesota.  5.4" of snow has fallen during the first 4 days at the Duluth National Weather Service, our average April snowfall is 6.3".

Weather History:

On this date in 1991:  A record high temperature of 69 degrees occurred at Duluth, Minnesota.
On this date in 2003:  8.5" of snow fell at Duluth, Minnesota.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Deep low pressure of 984mb has moved into Eastern Ontario Province This Afternoon.  Brisk north-northwest winds of 10-20 mph with gusts as high as 30 mph and cold air advection was occurring on the back side of this low Today, and there's also been some spotty Afternoon showers of rain or snow.  Highs Today were in the 30s.

Today's Upper Level Analysis:

A strong 500mb trough was moving through the Upper Midwest and Central Plains Today per water vapor satellite imagery with a powerful 150+ knot upper level jet in place across the Central-Eastern Great Lakes per RUC model analysis.  Another pocket of strong winds aloft >120 knots extended from Southwest Canada to Northern Montana with a disturbance heading E-SE through the Northern Rockies Today on the east side of this pocket of fast winds aloft.

Tonight:

Partly to mostly cloudy skies will be found in our area with spotty rain or snow showers ending This Evening.  Lows will be in the 20s with north or northwest winds at 10-20 mph with a few higher gusts before Midnight.

Tuesday and Tuesday Night:

An upper level disturbance will move into the Upper Midwest and could bring a few rain showers to Northern Minnesota and Northwest Wisconsin Tomorrow and Tomorrow Evening.  Some wet snow could mix in with the rain especially in far Northern Minnesota.  Highs Tuesday will be in the 40s, but a few spots up north could hold in the 30s.  Lows Tuesday Night will be in the 20s to around 30 degrees.  South or west winds are forecast during this period under 20 mph.

Extended Forecast:

Wednesday and Thursday look dry at the moment with highs mainly in the 40s with a few 50s possible on Thursday, but it will be cooler both days near Lake Superior.  Lows Wednesday Night and Thursday Night will be in the 20s and 30s.  A rather active pattern will re-develop over the Rockies and Plains from late week into early next week with one or more low pressure systems heading east-northeast through the Plains.  Models are in disagreement on how far north those lows will track and whether or not any precipitation will get up into our local area.  The main periods to watch for possible rain would be on Friday, April 8th.  The other period would be from Sunday to Monday, April 10th-11th.

5 Day Forecast for Duluth/Superior

.Tonight...  Breezy during the Evening with spotty light rain or snow showers.  Considerable cloudiness.  Low 22 to 27.  Wind northwest at 10 to 20 mph.

.Tuesday...  Considerable cloudiness.  A few showers possible.  High 40 to 45.  Wind southwest at 10 to 15 mph.

.Tuesday Night...  Partly to mostly cloudy.  Low 25 to 30.  Wind variable around 12 mph.

.Wednesday...  Partly cloudy.  High 40 to 45.

.Wednesday Night...  Partly cloudy.  Low 27 to 31.

.Thursday...  Partly sunny.  High 42 to 47.

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

.Friday...  Mostly cloudy.  High 40 to 45.

Normal temperatures for Tomorrow

High:  43
Low:  25

Sunrise Tomorrow:  6:41 AM CDT
Sunset Tomorrow:   7:43 PM CDT

Tim