Friday, April 15, 2011

4/15/11: Friday's Weather Report

Issued at 5:01 PM CDT, Friday, April 15th, 2011

Here are some snowfall reports from Thursday and Friday, April 14th-15th, 2011.  Source:  HPC.

Imperial, Nebraska:  10.0"
Valentine, Nebraska:  9.0"
3 miles east of North Platte, Nebraska:  4.0"
14 miles north of Isabel, South Dakota:  14.0"
6 miles east of Hayes, South Dakota:  11.0"
Flasher, North Dakota:  10.5"
2.4 miles north-northwest of Bismarck, North Dakota:  6.8"

Note:  This same storm that is producing snow in portions of the Western High Plains, Northern Plains, and Upper Midwest has produced a major outbreak of severe weather from the Central Plains to the Southeast U.S.  Preliminary tornado count is us to 72 including (22 on Thursday) and (50 Today) per SPC.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Deep low pressure of 996mb was centered in Northwest Missouri late This Afternoon with high pressure of 1034mb centered near Hudson Bay Canada.  A tight pressure gradient continues Today due to the pressure difference between the low and high.  East to northeast winds of 10 to 25 mph were found across our area Today with much stronger winds near Lake Superior with gusts of 40-55 mph!  Highs Today were in the 30s and 40s.  Mostly cloudy skies were found in our area Today with some rain or wet snow occurring at times mainly in Western areas, from Cass Lake and Walker down toward Brainerd.

Tonight:

Low pressure will move from Northwest Missouri to Northern Illinois, pressures near the center of that low will drop from 996mb to around 993mb by dawn.  Snow will develop This Evening in Northeast, Eastcentral, and parts of Northern Minnesota while a mixture of snow, sleet, and rain develops in Northwest Wisconsin.  Lows Tonight will be in the 20s to lower 30s with east or north winds at 10-25 mph with gusts over 40 mph continuing mainly near Lake Superior.

Saturday and Saturday Night:

Strong low pressure of 993mb will deepen to around 985mb during this period as it tracks from Northern Illinois to Eastern Ontario Province.  Snow in Northern-Eastern Minnesota with a mix of snow, rain, and sleet in Northwest Wisconsin will gradually diminish from south to north during the Afternoon hours.  Mostly cloudy skies on Saturday will become partly-mostly cloudy Saturday Night.  Highs Tomorrow will be in the 30s and 40s with lows Tomorrow Night mainly in the 20s.  Winds on Saturday will be out of the north or northwest at 15-35 mph with winds Tomorrow Night out of the north or west at 10-25 mph.

Note:  Total snowfall accumulations of 4-9" are expected Tonight and Saturday in Northeast and Eastcentral Minnesota with the heavier amounts >6" occurring northeast of Duluth.  1-3" of snow can be expected in Northern Minnesota with 1-4" for Northwestern Wisconsin.

Extended Forecast:

Sunday and Sunday night look dry at this time with highs in the 30s and 40s with lows mainly in the 20s.  Next Monday through Wednesday could turn stormy once again, but the forecast models are not in agreement with the track of the next potent low pressure system moving out of the Rockies.  If this storm tracks far enough north, then another round of snow or rain would affect portions of Northern Minnesota and Northwest Wisconsin during the early to mid part of next week.

5 Day Forecast for Duluth/Superior

*WINTER WEATHER ADVISORY*
Timing:  9 PM CDT Tonight until 12 PM CDT Saturday.

.Tonight...  Windy...  Snow developing between 9 PM-12 AM.  Low 27 to 32.  Wind east to northeast at 15 to 30 mph with gusts of 40 to 55 mph This Evening.  Areas of blowing and drifting snow possible late.

.Saturday...  Windy.  Occasional snow tapering off to Afternoon snow showers and flurries.  Total snowfall accumulations of 2-5".  Mostly cloudy.  High 36 to 41.  Wind northwest at 15 to 30 mph.

.Saturday Night...  Partly to mostly cloudy.  Low 25 to 30.  Wind northwest at 10 to 20 mph.

.Sunday...  Partly cloudy.  High 40 to 45.

.Sunday Night...  Partly to mostly cloudy.  Low 25 to 30.

.Monday...  Rain or snow possible.  Mostly cloudy.  High 35 to 40.

.Monday Night...  Mostly cloudy.  Low 27 to 32.

.Tuesday...  Mostly cloudy.  High 35 to 40.

Normal temperatures for Tomorrow:

High:  49
Low:  29

Sunrise Tomorrow:  6:20 AM CDT
Sunset Tomorrow:   7:58 PM CDT

Tim