Wednesday, April 27, 2011

4/27/11: Wednesday's Weather Report

Issued at 4:21 PM CDT, Wednesday, April 27th, 2011

Another significant late season snowfall across parts of our area Tuesday and Wednesday, April 26th-27th, 2011.  Source:  NWS Duluth, Minnesota.

2 miles northwest of Mellen, WI (Ashland county)  9.0" measured in elevated terrain, 200 feet higher than the city of Mellen.
4 miles east of Cornucopia, WI (Bayfield county)  8.0"
Maple, WI (Douglas county)  6.5"
Mellen, WI (Ashland county)  6.0"
4 miles west of Washburn, WI (Bayfield county)  6.0"
4 miles west of Clam Lake, WI (Bayfield county)  6.0"
Cornucopia, WI (Bayfield county)  5.5"
3 miles northwest of Bennett, WI (Douglas county)  5.5"
Oulu, WI (Bayfield county)  4.8"
Tower, MN (St. Louis county)  4.5"
Hawthorne, WI (Douglas county)  4.3"
High Bridge, WI (Ashland county)  4.0"
Poplar, WI (Douglas county)  4.0"
Embarrass, MN (St. Louis county)  3.0"
Glidden, WI (Ashland county)  3.0"
3 miles west of Grand Marais, MN (Cook county)  3.0"
20 miles north of Grand Marais, MN (Cook county)  3.0"
Chisholm, MN (St. Louis county)  3.0"
Upson, WI (Iron county)  3.0"
10 miles south of Superior, WI (Douglas county)  2.5"
2 miles southeast of Finland, MN (Lake county)  2.5"
Saginaw, MN (St. Louis county)  2.5"
6 miles south of Brainerd, MN (Crow Wing county)  2.0"
Virginia, MN (St. Louis county)  2.0"
Nashwauk, MN (Itasca county)  2.0"
3 miles northwest of Cloquet, MN (Carlton county)  1.5"
1 mile north of Mille Lacs Lake, MN (Aitkin county)  1.5"
Bigfork, MN (Itasca county)  1.0"

6 miles northwest of Duluth, MN (St. Louis county)  1.0" measured at the NWS.

An incredible severe weather outbreak continues Today across parts of the Southern/Southeast U.S., through portions of the Ohio Valley and Eastern U.S.  Source:  Storm Prediction Center

*700 preliminary severe weather reports/61 tornadoes on Tuesday, April 26th, 2011
*74 preliminary tornado reports (thru 5 PM CDT Today) this number will likely exceed 100 by late Tonight

Weather headlines:

-Lingering snow and rain thru Thursday Morning
-Friday looks nice
-Next storm with a new rain threat arrives Friday Night and lingers thru Saturday

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Tuesday's low has moved into Northeast Wisconsin This Afternoon with two other lows (994-996mb), one centered in Northwest Lake Huron, the other in Southeast Missouri lifting north-northeast.  Overcast skies with lingering rain and snow were found in our area Today with some rather vigorous snow bursts at times.  Highs Today were in the 30s to lower 40s with north or east winds under 20 mph.

Today's Upper Level Analysis:

500mb low/trough covered the Northern Plains and Upper Midwest Today with the combination of cold temperatures aloft (around -25 degree C H5 temps) and some instability with capes of a couple hundred j/kg was helping to trigger a few pop up thunderstorms This Afternoon over parts of the Dakotas.  Very strong jet stream winds >110 knots extending from the Southern Rockies to Northern Mississippi is fueling the historic severe weather outbreak that is ongoing in the Southern U.S. Today.

Tonight:

Low pressure will be centered over the Ohio Valley and Eastern Great Lakes with an upper level low moving slowly toward the south-east across the Upper Midwest.  Snow or a mix of snow and rain showers will persist in our area Tonight with new snow accumulations of 1-2" possible in a few locations.  Lows Tonight will mainly be in the 30s with north or east winds under 20 mph.

Thursday and Thursday Night:

Surface and upper level low will continue to push slowly toward the east on Thursday, lingering rain and snow showers will be found in Northeast Minnesota and Northwest Wisconsin on Thursday, little additional snow accumulation is expected though.  Mostly cloudy skies are forecast Tomorrow with highs in the 40s with a few 50s possible in western areas.  Partly to mostly cloudy skies can be expected Tomorrow Night with lows in the 30s.

Extended Forecast:

Friday looks dry with high pressure pushing through the area.  Highs on Friday will be in the 50s and 60s, but it will be cooler near Lake Superior.  Rain threat increases Friday Night into Saturday as low pressure passes northwest-north of our area while a cold front attached to that low heads east through our area on Saturday.  A strong southerly low level jet of 40-60 knots will be in place along and ahead of the cold front Friday Night through midday Saturday which will pull deeper moisture north into our area.  Current indications point to a quarter to one half inch of rain for most of Northern Minnesota and Northwest Wisconsin for Friday Night and Saturday.  Low temperatures Friday Night will be in the 30s and 40s with highs on Saturday in the 40s and 50s with falling temperatures to the 30s in Northern Minnesota.  Lows Saturday Night will be in the 20s and 30s.  There might be a few lingering showers Saturday Night behind this system, and some snow could mix with the rain showers in Northern Minnesota.

5 Day Forecast for Duluth/Superior

.Tonight...  Occasional snow showers which will be mixed with drizzle or light rain at times.  New snowfall accumulations up to 1".  Mostly cloudy.  Low 30 to 35.  Wind north to northeast at 10 to 15 mph.

.Thursday...  Occasional snow or rain showers mainly during the Morning.  Snow accumulations less than 1".  Considerable cloudiness.  High 45 to 50.  Wind north at 10 to 20 mph.

.Thursday Night...  Partly cloudy.  Low 30 to 35.  Wind west at 10 to 15 mph.

.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 45 to 50.

.Saturday Night...  Variable cloudiness.  A few showers possible.  Low 30 to 35.

.Sunday...  Partly sunny.  High 45 to 50.

Normal temperatures for Today

High:  55
Low:  33

Sunrise Tomorrow:  5:59 AM CDT
Sunset Tomorrow:   8:14 PM CDT

Tim