Tuesday, August 24, 2010

8/24/10: Tuesday's Weather Report

Issued at 3:07 PM CDT, Tuesday, August 24th, 2010

Weather Tidbits for Duluth, Minnesota: Source: NWS Duluth, MN.

*Average Monthly Temperature through August 23rd: 67.8 degrees
Departure: 3.2 degrees Above Normal.

*Rainfall total through August 23rd: 6.11"
Departure: 3.08" Above Normal.

*August 2010 has produced 10 days (so far) with a maximum temperature of at least 80 degrees.

Rainfall report for Northern Minnesota and Northwest Wisconsin from earlier Today, Tuesday, August 24th, 2010. Source: NWS Duluth, MN.

Duluth MN: 0.11"

International Falls MN: 0.43"

Brainerd MN: 0.50"

Hibbing MN: 0.81"

Cass Lake MN: 0.36"

Cook MN: 0.49"

Kabetogama MN: 0.57"

Northome MN: 0.32"

2 miles South of Tower MN: 0.56"

Littlefork MN: 0.40"

Dixon Lake MN: 0.35"

Floodwood MN: 0.42"

3 miles East of Orr MN: 0.55"

Hinckley MN: 0.31"

3 miles South of Ashland WI: 0.11"

Gordon WI: 0.16"

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Monday Night's cold front has moved into the Central Great Lakes This Afternoon with a secondary surface trough heading southeast out of Northeast North Dakota/Southeast Manitoba Province. Deep low pressure averaging 992 was in Northwestern Ontario Province This Afternoon while high pressure averaging 1026 mb was centered in Western Nebraska. The pressure difference between the low to our north and high to our southwest resulted in strong westerly winds across our area Today. Wind speeds of 15-25 mph were common with gusts up to 35 mph! Mostly cloudy skies prevailed in Northern Minnesota Today with more sunshine found from Eastern Minnesota into Northwestern Wisconsin. High temperatures Today were running around 20 degrees cooler compared to Monday with 60s and 70s covering the area Today. Much drier air has also moved into Northern Minnesota and Northwest Wisconsin Today with dewpoints in the 40s and 50s with late day PWS of 0.60-0.80".

Today's Upper Level Analysis:

A strong upper level trough was passing through the Northern Plains Today with a 60-80 knot mid level jet and a 90-110 knot upper level jet in place ahead of this H5 trough from the Upper Midwest to Central Ontario Province per RUC model analysis. Impressive 12 hour 500 mb height falls of 60-90 meters covered the Upper Midwest/Western Great Lakes/Central areas of Canada Today ahead of this 500 mb trough.

Note: 12 hour 500 mb height changes from 7 AM CDT Monday to 7 AM CDT Today.

Fargo North Dakota: 5880 meters/5750 meters
Bismarck North Dakota: 5840 meters/5710 meters
Minneapolis Minnesota: 5920 meters/5830 meters
Western Ontario Province: 5860 meters/5680 meters
Central Manitoba Province: 5700 meters/5520 meters


Cold advection will continue in our local area with 850 mb temperatures dropping from +7/+11 degrees late This Afternoon to around +6 degrees C later in the night. A trough will settle southeast and through our area This Evening with a spotty shower or two possible along this boundary, otherwise partly-mostly cloudy skies will occur Tonight with patchy drizzle possible Overnight, mainly in Northern Minnesota. Lows Tonight will be in the 40s and 50s with west winds from 15-30 mph, decreasing to 10-20 mph late.

Wednesday and Wednesday Night:

High pressure will move into the Upper Midwest/Central Plains during this period with cool temperatures, low humidity and a partly cloudy sky on Wednesday with mostly clear skies Wednesday Night. Highs Tomorrow will be in the 60s to lower 70s with lows Tomorrow Night in the 40s, but some 30s are expected in the typical cold spots. Northwest winds around 20 mph or less are forecast Tomorrow and Tomorrow Night.

Extended Forecast:

High pressure will push off to our southeast on Thursday with high pressure remaining well to our south/east from Friday into early next week. The 500 mb flow will transition to the southwest from late this week into at least early next week as a surface boundary stalls out from the Northern Plains toward Southern Ontario Province/far Northern Minnesota with an upper level trough covering the Western U.S. This type of weather pattern is usually a warm one for the Upper Midwest and that looks to be the case this go around. Strengthening south winds will overspread our area later this week and persist into the weekend, expect a gradual increase in moisture with 60+ degree dewpoints returning by the weekend into early next week. High temperatures will be mainly in the 70s on Thursday with 70s and 80s for Friday. Lows will be in the 40s and 50s Thursday Night and mainly 50s Friday Night.

Looks dry across Northern Minnesota and Northwest Wisconsin for Thursday and Friday. Scattered showers/thunderstorms will be possible this weekend, mainly in Northern Minnesota, but it's possible that most of the precipitation will stay off to our west-northwest through Sunday. Chances for showers/thunderstorms should spread farther south/east early next week the way it looks now.

5 Day Forecast for Duluth/Superior

.Tonight... Breezy. Partly to mostly cloudy. Low 48 to 53. Wind west at 10 to 20 mph with gusts to 30 mph especially This Evening.

.Wednesday... Mostly sunny. High 66 to 71. Wind northwest at 10 to 20 mph.

.Wednesday Night... Mostly clear. Low 45 to 50. Wind northwest at 5 to 15 mph.

.Thursday... Mostly sunny. High 70 to 75.

.Thursday Night... Mostly clear. Low 50 to 55.

.Friday... Mostly sunny. High 73 to 78.

.Friday Night... Mostly clear. Low 55 to 60.

.Saturday... Mostly sunny. High 80 to 85.

Normal High Temperature Today 72 degrees

Normal Low Temperature Today 52 degrees