Friday, May 13, 2011

5/13/11: Friday's Weather Report

Issued at 3:26 PM CDT, Friday, May 13th, 2011

St. Michael, Minnesota tornado information.  Source:  NWS Chanhassen, Minnesota.

Rating:  EF-1 tornado.
Time:  Just before 8:00 PM CDT on the Evening of Tuesday, May 10th, 2011.
Path length:  Approximately 3 miles.
Maximum wind speeds:  Near 90 mph.

The tornado touched down 2 miles northwest of Downtown Hanover, near the intersections of county roads 34 and 120...north-northeast to 1 mile west of St. Michael...dissipating just southeast of the 45th street and Jamison Avenue intersection.  This was a narrow tornado, only 75 feet wide at most, but it was often narrower than 75 feet.

High temperature report for Wednesday, May 11th, 2011.  Source:  NWS Duluth, Minnesota.

Duluth, MN:  75 degrees
International Falls, MN:  72 degrees
Brainerd, MN:  79 degrees
Hibbing, MN:  82 degrees
Two Harbors, MN:  70 degrees
Grand Marais, MN:  77 degrees
Ely, MN:  82 degrees
Orr, MN:  81 degrees
Eveleth, MN:  82 degrees
Grand Rapids, MN:  77 degrees
Longville, MN:  77 degrees
Aitkin, MN:  81 degrees
Cloquet, MN:  77 degrees
Siren, WI:  76 degrees
Bruno, MN:  79 degrees
Embarrass, MN:  80 degrees
Floodwood, MN:  82 degrees
2 miles south of Tower, MN:  82 degrees
Gurney, WI:  78 degrees
Upson, WI:  76 degrees
Gordon, WI:  78 degrees

*Record warmth in Southern Minnesota on Tuesday, May 10th, 2011*  Source:  NWS Chanhassen, MN.

Waseca, MN:  92 degrees...Tied the record for the date, last set in 1987.
Wells, MN:  93 degrees
St. James, MN:  93 degrees
Fairmont, MN:  93 degrees
Amboy, MN:  96 degrees
Winnebago, MN:  96 degrees

Note:  Amboy, and Winnebago, Minnesota missed the all-time state record high temperature of 97 degrees for the 10th of May by just one degree.

*Record high dewpoints in Southern Minnesota on Tuesday, May 10th, 2011.  Source:  NWS Chanhassen, MN*

Minneapolis/St. Paul, MN:  70 degrees
Windom, MN:  70 degrees
St. James, MN:  70 degrees
Faribault, MN:  70 degrees
Hutchinson, MN:  73 degrees
Albert Lea, MN:  74 degrees
Waseca, MN:  78 degrees

Note:  The 78 degree dewpoint at Waseca, MN on Tuesday, May 10th, 2011 may have been the highest ever measured in the month of May.

Another outbreak of severe thunderstorms with about two dozen tornado reports affected portions of the Northern, Central, Eastern, and Southern U.S.  This latest outbreak started on Sunday, May 8th and continues Today...May 13th.  Here are the preliminary numbers.  Source:  SPC. 

Note:  Severe weather reports consist of hail at least 1" in diameter and or wind gusts of 60 mph or greater.

May 8th, 2011:      26 severe weather reports/1 tornado report.
May 9th, 2011:      66 severe weather reports/3 tornado reports.
May 10th, 2011:  413 severe weather reports/3 tornado reports.
May 11th, 2011:  320 severe weather reports/14 tornado reports.
May 12th, 2011:  260 severe weather reports/4 tornado reports.

5 day total:  1,085 severe weather reports/25 tornado reports.

Weather tidbits:

*75 degrees at Duluth, Minnesota on May 11th, 2011...This was the 1st time above 70 degrees since October 10th, 2010.

Weather history:

On this date in 1997:  A record low temperature of 22 degrees occurred at Duluth, Minnesota.

WEATHER HEADLINES:

*Cool/breezy weekend ahead
*Rain chances into Saturday
*A stretch of dry weather takes hold Saturday Night and lingers thru most of next week

Forecast discussion for Northeast Minnesota and Northwest Wisconsin

Today's weather:

Low pressure of 1004mb has moved into Western Illinois This Afternoon with high pressure of 1036mb centered in Central Saskatchewan Province.  Overcast skies with areas of light rain and drizzle have been falling in portions of our area Today.  Temperatures have taken a nose dive compared to previous days.  Highs Today were only in the 40s and 50s with north or east winds under 20 mph.

Today's upper level analysis:

Jet stream winds are relaxing and a slow moving/blocky pattern is developing.  Large upper level trough covered the Northern-Central part of the Pacific into far Western Canada per water vapor satellite imagery.  Upper level trough covered the Plains and Upper Midwest with an upper level ridge over the Southwest U.S.  One 500mb low was moving east across Missouri late Today with another H5 low dropping south into the Upper Midwest.

Tonight and Saturday:

Upper level low/upper trough will settle south through the Upper Midwest through Saturday.  Expect some light rain and drizzle at times which will spread from east to west Tonight, and push northeast to southwest on Saturday.  Drying should commence Saturday Afternoon in Northern Minnesota while a lingering rain chance persists for Eastcentral Minnesota and Northwest Wisconsin.  Mostly cloudy skies are forecast Tonight with lows in the 30s and 40s.  Some sunshine should develop across Northern Minnesota Saturday Afternoon with overcast skies for the rest of us.  Highs Tomorrow will be in the 40s and 50s.  Winds during this period will be out of the north or east at 10-20 mph with higher gusts.

Note:  Rainfall totals Tonight and Saturday will be less than 0.10" in Northern Minnesota and Northwest Wisconsin.

Saturday Night:

Skies will clear from north to south as high pressure moves into Central Canada with low pressure pulling into the Southern Great Lakes/Ohio Valley region.  Lows Tomorrow Night will be in the 30s to around 40 degrees.  North or east winds are expected at 10-20 mph.

Extended Forecast:

A dry weather pattern will occur for Northern Minnesota and Northwest Wisconsin from Sunday, May 15th through at least Thursday, May 19th.  Cool nights and near to slightly below average daytime highs can be expected through most of next week.  High temperatures for Sunday and Monday will be in the 50s and 60s with 40s near Lake Superior.  Lows Sunday Night and Monday Night will mainly be in the 30s.  Note:  Scattered frost could develop Sunday Night in parts of Northwest Wisconsin and Northcentral Minnesota.

5 DAY FORECAST FOR DULUTH/SUPERIOR

.Tonight...  Mostly cloudy.  Spotty Evening drizzle.  Occasional light rain arriving after Midnight.  Low 35 to 40.  Wind east to northeast at 10 to 20 mph.

.Saturday...  Breezy.  Occasional light rain and drizzle through early Afternoon.  Considerable cloudiness.  High 47 to 52 but cooler near Lake Superior.  Wind east to northeast at 15 to 30 mph.

.Saturday Night...  Partly cloudy.  Low 35 to 40.  Wind east to northeast at 10 to 20 mph.

.Sunday...  Mostly sunny.  High 50 to 55 but cooler near Lake Superior.

.Sunday Night...  Fair.  Low 32 to 37.

.Monday...  Mostly sunny.  High 55 to 60 but cooler near Lake Superior.

.Monday Night...  Mostly clear.  Low 35 to 40.

.Tuesday...  Mostly sunny.  High 58 to 63 but cooler near Lake Superior.

Normal temperatures for Today

High:  63
Low:  39

Saturday's pollen forecast:

Tree:    High
Grass:  None
Weed:  None

Sunrise Tomorrow:  5:35 AM CDT
Sunset Tomorrow:   8:35 PM CDT

Tim