Tuesday, June 29, 2010

6/29/10: Tuesday's Weather Report

Issued at 3:24 PM CDT, Tuesday, June 29th, 2010

Weather History:

On this date in 1992... A record low temperature of 40 degrees occurred at Duluth, MN. Note: We missed the record low temperature by just 2 degrees at the Duluth Airport Today.

A chilly start to the day across portions of Northern Minnesota and Northwest Wisconsin. Here are some low temperatures that were reported earlier Today. Source: NWS Duluth, MN.

Duluth MN: 42 degrees

International Falls MN: 36 degrees

Hibbing MN: 35 degrees

Silver Bay MN: 34 degrees

Ely MN: 37 degrees

Bigfork MN: 36 degrees

Cloquet MN: 39 degrees

Hayward WI: 40 degrees

Superior WI: 43 degrees

Babbitt MN: 33 degrees

2 miles South of Tower MN: 38 degrees

Embarrass MN: 31 degrees

Floodwood MN: 37 degrees

3 miles East of Orr MN: 34 degrees

3 miles South of Ashland WI: 42 degrees

Butternut WI: 43 degrees

Upson WI: 41 degrees

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Mainly sunny skies were found across our area Today, although there's been some clouds at times mainly in extreme Northeast Minnesota, around the Pigeon River, Grand Portage, Hovland, and Grand Marais area. High temperatures Today were in the middle 60s to around 70 degrees which is about 5-7 degrees below average for late June, but with the full sunshine around it didn't feel that cool. Dewpoints This Afternoon were only in the 30s and 40s with PWS around one half inch! Winds Today were variable under 15 mph. Surface map This Afternoon featured a 1024 mb high pressure ridge extending from Western Ontario Province through Central Minnesota, south through the Central Plains.

Today's 500 mb analysis:

A large upper level low (540 meters) was heading south/east from Southern Hudson Bay/Eastern Ontario Province This Afternoon per water vapor satellite imagery. Note: 850 mb temps near zero degrees C with surface temps of 38-40 degrees along with low enough critical thickness values would be favorable for some snow to mix in with any precipitation that was falling near this upper low over portions of Eastern Canada Today, it's a very chilly airmass for late June, but luckly the heart of the real cold air stayed well to our northeast. An upper level ridge (588 meters) was beginning to push east across the Northern Plains Today with 850 mb temperatures ranging from +20/+32 degrees C This Afternoon across the Rockies and Western High Plains underneath this ridge with temperatures from 85-95 degrees Today from the Rockies east to the Central-Western Dakotas per RUC model analysis.

Tonight:

Mainly clear skies albeit a tad on the hazy/smoky side at times across our local area with low temperatures in the 40s to lower 50s, but some 30s will probably occur one last night in the typical cold spots. Ridge of high pressure will remain over our area Tonight with variable winds under 12 mph.

Wednesday and Wednesday Night:

High pressure ridge shifts east of our area with a southerly return flow beginning to develop, highs on Wednesday will be in the 60s and 70s with one last day of low humidity levels. Lows Tomorrow Night will be generally in the 50s. Mostly sunny skies are expected on Wednesday with clear-partly cloudy skies Wednesday Night.

Extended Forecast:

Increasing warmth and humidity will be the weather highlights across the Upper Midwest from Thursday into Saturday as a cold front and area of low pressure center themselves over the Northern Plains while high pressure remains anchored to our southeast. A S/SW wind will lock in during the day Thursday and will linger into Saturday the way it looks now.

High temperatures Thursday and Friday will reach the 70s and 80s across Northern Minnesota and Northwest Wisconsin with a few 90s not out of the question Friday or Saturday depending on the amount of sunshine. It will be cooler at the head of Lake Superior and up the North Shore of Lake Superior on Thursday, but any cooling should be confined to areas northeast of Downtown Duluth by Friday and Saturday. Dewpoints will start to increase Thursday with 50s/60s spreading into our local area, with mainly 60s on tap for Friday and Saturday. Low temperatures Thursday Night and Friday Night will be in the 50s and 60s.

It should remain dry in our area Thursday and Friday, although a warm front will be moving northeast on Thursday, although with the upper ridge over the area and warming aloft, it doesn't look like any showers or thunderstorms will develop as this warm front moves through. Chances for showers or thunderstorms will be with us this weekend and early next week as a cold front pushes slowly into the Upper Midwest while some low pressure disturbances ride northeast along this boundary. The set-up appears somewhat favorable for periods of heavy rainfall and possibly some severe weather this weekend and early next week, but what area/s are affected is uncertain at this time.

5 Day Forecast for Duluth/Superior

.Tonight... Mainly clear with some haze and smoke. Low 41 to 46, a little warmer in Downtown Duluth. Wind north to northeast under 12 mph.

.Wednesday... Mostly sunny. High 68 to 73 but a little cooler near Lake Superior. Wind east at 10 to 15 mph.

.Wednesday Night... Mostly clear. Low 50 to 55. Wind east to southeast at 5 to 15 mph.

.Thursday... Partly cloudy. High 73 to 78 but cooler near Lake Superior.

.Thursday Night... Mostly clear. Low 57 to 62.

.Friday... Partly cloudy. High 81 to 86.

.Friday Night... Mostly clear. Low 62 to 67.

.Saturday... Partly cloudy. High 82 to 87.

Normal High Temperature Today 74 degrees

Normal Low Temperature Today 52 degrees

Tim