Tuesday, April 19, 2011

4/19/11: Tuesday's Weather Report

Issued at 4:49 PM CDT, Tuesday, April 19th, 2011

Weather Headlines:

*Late season snowstorm missing the Northland Tonight
*Some areas could still get some snow showers/flurries Tonight-Wednesday
*Mild Thursday ahead
*Next system set to arrive Friday-early Saturday

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Strong area of low pressure averaging 998mb was centered in Eastern Missouri late This Afternoon with a high pressure ridge of 1020-1024mb off to our northwest, north, and northeast.  Snow, heavy at times with embedded thunderstorms have occurred Today northwest of that Missouri low from Southern Minnesota through Central-Eastern Wisconsin while our area was influenced more by the high which resulted in mainly dry conditions along with partly sunny to mostly cloudy skies.  Highs Today were in the middle 30s to middle 40s with east or northeast winds at 5-15 mph with gusts over 25 mph closer to Lake Superior.

Today's Upper Level Analysis:

A quick moving, but potent 500mb trough was pushing east through the Central Plains per water vapor satellite imagery.  A 140 knot upper level jet was located in Eastern Canada while a 110 knot jet streak blasts east-southeast through the Central/Southern Rockies Today.  Note:  A tremendous temperature gradient was in place This Afternoon ranging from 35 degrees at Chicago, Illinois to 79 degrees at Peoria, Illinois to 88 degrees at Fort Smith, Arkansas.  This temperature contrast, plus the strong jet stream winds are helping to energize this storm in the Plains Today.

Tonight:

Partly to mostly cloudy skies will cover Northern Minnesota with overcast skies elsewhere.  Expect some snow to spread into portions of Northwest Wisconsin Tonight, mainly south-southeast of a line from Hayward to Mercer.  Snowfall accumulations of 1-3" are possible in Sawyer and Price counties Wisconsin by Wednesday Morning.  The remainder of our area could see some flurries or snow showers at times, but no accumulation is expected.  Low pressure will track from Eastern Missouri to Northern Ohio by dawn while a disturbance heads east-southeast out of the Dakotas with high pressure remaining to our north.  Lows Tonight will mainly be in the 20s to around 30 degrees with east or north winds up to 20 mph.

Note:  *Winter Weather Advisory* is in effect from 9 PM CDT Tonight until 7 AM CDT Wednesday for Sawyer and Price counties Wisconsin.  Some cities included in the advisory are:  Hayward WI...Winter WI...Exeland WI...Park Falls WI...Phillips WI...and Ogema WI.

Wednesday and Wednesday Night:

Low pressure will move into Eastern Canada with a weak disturbance pushing through the Upper Midwest on Wednesday.  Partly-mostly cloudy skies are expected Tomorrow with a few snow showers or flurries possible.  Partly cloudy skies are forecast Wednesday Night.  Highs Tomorrow will be in the 30s and 40s with lows Tomorrow Night in the 20s.  Winds will be out of the north or northwest at 10-20 mph.

Extended Forecast:

High pressure will move across our area on Thursday with southerly winds resulting in high temperatures getting back closer to average for late April.  Highs will be in the 40s and 50s.  Thursday Night through early Saturday could turn wet at times as a low pressure system heads through the Upper Midwest.  Most of the significant moisture/rainfall should remain well to our south, but some rain can still be expected for Northern Minnesota and Northwest Wisconsin from late Thursday Night into early Saturday.  There might be some wet snow mixing with the rain especially Friday Night, but no accumulations of snow are expected at this time.  Lows Thursday Night will be in the 30s with highs Friday in the 30s and 40s, lows Friday Night will be in the 30s.

The Easter holiday weekend looks mainly dry, after early Saturday Morning with some areas possibly getting close to 60 degrees by Sunday.

The next storm system that could impact the Upper Midwest would occur during the early or middle part of next week, April 25th-27th.  This storm could bring some rain and perhaps even a few thunderstorms to our local area.

5 Day Forecast for Duluth/Superior

.Tonight...  Variable cloudiness.  Low 25 to 30.  Wind east to northeast at 10 to 20 mph with a few higher gusts.

.Wednesday...  Partly sunny.  Snow flurries possible.  High 38 to 43.  Wind north to northwest at 10 to 20 mph.

.Wednesday Night...  Partly cloudy.  Low 25 to 30.  Wind northwest at 5 to 15 mph.

.Thursday...  Partly cloudy.  High 50 to 55.

.Thursday Night...  Becoming mostly cloudy.  Low 31 to 34.

.Friday...  Occasional rain possible.  Mostly cloudy.  High 38 to 43.

.Friday Night...  Occasional rain possible.  Mostly cloudy.  Low 31 to 34.

.Saturday...  Partly sunny.  High 46 to 51.

Normal temperatures for Today

High:  51
Low:  30

Sunrise Tomorrow:  6:13 AM CDT
Sunset Tomorrow:   8:04 PM CDT

Tim