Issued at 5:32 PM CST, Sunday, January 25th, 2009
Surface Analysis at 23z:
Arctic high pressure ridge averaging 1030-1032 mb was centered to the west and southwest of Minnesota.
Upper Air Analysis at 23z:
Northwest flow aloft was evident around the Upper Midwest Today per water vapor satellite imagery with an upper level trough and area of low pressure heading east through Southern Idaho, Nevada, and Utah. Polar vortex remained over the Hudson Bay/Northwest Ontario/Northeast Manitoba area for the third day in a row now. H85 temperatures around Minnesota at 23z ranged from -16 to -20 degrees C around Minnesota with the coldest air with minus 24 to minues 32 degree C 850 mb temps located to the northeast of Minnesota.
Another cold day around the state with partly sunny to mostly cloudy skies covering Southern areas with more sunshine the farther north you were. Highs Today were in the single digits below to above zero with some teens South. Winds across the state were out of the west, northwest, or southwest Today around 20 mph or less.
5 PM temperatures around Minnesota ranged from 8 degrees at St. Paul to -11 degrees at Fosston to -6 degrees at International Falls to -2 degrees at Hibbing to -8 degrees at Fergus Falls to -6 degrees at Pine River to 9 degrees at Windom to 9 degrees at Fairmont to 12 degrees at Winona.
Tonight through Monday Night:
*Wind Chill Advisory* remains in effect through Noon CST Monday for the Northern half of Minnesota into Western Minnesota.
Arctic high pressure will remain in control of our weather through this forecast period. Look for clear to partly cloudy skies with more clouds at times across the South where some snow flurries could fall from time to time. Lows Tonight and Monday Night will be in the single digits, teens, and 20s below with some 30s below possible North. Highs Monday will be in the single digits below to above zero with some teens possible South. Winds during this period will be out of the west, northwest, or southwest around 20 mph or less.
Flow aloft looks to remain out of the northwest around the Upper Midwest through next weekend. Some clipper systems will begin to impact our weather on occasion from mid-week into next weekend, but right now the tracks of these systems are unfavorable for them to produce anything more than areas of snow showers and flurries with just minor accumulations expected the way it looks now. One such clipper looks to move through about Wednesday with another one expected toward Saturday. High temperatures around Minnesota will be in the single digits, teens, and 20s for Tuesday and Wednesday with lows Tuesday Night and Wednesday Night in the single digits below to above zero with some teens for some locations.
Locally for Duluth/Superior:
*Wind Chill Advisory* through Noon CST Monday…
.Tonight… Bitterly cold with dangerous wind chills. Mostly clear. Low 14 below to 21 below. Wind west around 15 mph. Wind chills ranging from 25 below to 40 below.
.Monday… Very cold. Mostly sunny. High zero to 8 above. Wind west around 15 mph. Wind chills ranging from 25 below to 40 below during the Morning.
.Monday Night… Frigid… Mostly clear. Low 14 below to 21 below. Wind west under 12 mph.
.Tuesday… Partly cloudy. High 5 to 10.
.Tuesday Night… Partly to mostly cloudy. Low zero to 5 above.
.Wednesday… Flurries possible. High 13 to 18.
.Wednesday Night… Flurries possible. Low zero to 5 above.
5 PM Thompson Hill Observation:
Current Temperature: -2 degrees
Dewpoint: -16 degrees
Wind: WSW at 11 mph G 14 mph
Max Temperature Today: 3.8 degrees
Max Humidity Today: 79%
Min Temperature Today: -14.6 degrees
Min Humidity Today: 46%
Normal High Temperature Tomorrow 19 degrees
Normal Low Temperature Tomorrow -1 degree