Monday, August 2, 2010

8/2/10: Monday's Weather Report

Issued at 3:12 PM CDT, Monday, August 2nd, 2010

Another round of heavy rainfall hit portions of Northeast Minnesota and Northwest Wisconsin Sunday Night, August 1st, 2010. Here are some rainfall totals from the National Weather Service Duluth, Minnesota.

10 miles Southwest of Brimson MN (St. Louis County) 3.16"

Two Harbors MN (Lake County) 2.92"

Squaw Lake MN (Itasca County) 3.30"

5 miles East-Southeast of Hibbing MN (St. Louis County) 3.73". 1.58" fell between 9-11 PM Sunday Night.

12 miles South-Southwest of Brimson MN (St. Louis County) 4.68"

Chisholm MN (St. Louis County) 3.84"

2 miles Northeast of Duluth MN-East Duluth (St. Louis County) 2.23"

Herster WI (Bayfield County) 2.00"

6 miles North-Northwest of Oulu WI (Douglas County) 2.45"

Here are some additional rainfall totals from Sunday Night 8/1/10: Source, NWS Duluth MN.

Duluth MN: 1.66"

International Falls MN: 0.16"

Brainerd MN: 0.67"

Hibbing MN: 3.67"

Ashland WI: 1.83"

Hayward WI: 0.64"

Grand Portage MN: 0.26"

Cook MN: 0.67"

Kabetogama MN: 0.44"

Northome MN: 0.52"

Embarrass MN: 0.92"

Dixon Lake MN: 2.20"

Floodwood MN: 1.08"

3 miles South of Ashland WI: 2.30"

9 miles North of Bayfield WI: 0.72"

Madeline Island WI: 2.26"

5 miles Northwest of Washburn WI: 1.85"

Gordon WI: 0.63"

Butternut WI: 0.83"

Upson WI: 3.12"

Sarona WI: 0.46"

Weather tidbits:

*Year to date 80 degree days at Duluth, Minnesota: 19 compared to 10 days in 2009.

*Year to date 70 degree days at Duluth, Minnesota: 46 compared to 37 in 2009.

*July 2010 was the 6th month out of 7 so far this year that has had an Above Average Monthly temperature at Duluth, MN. June 2010 was the only month (so far) this year that was below normal by just 0.1 degree!

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

A weak surface boundary extended from Northern Wisconsin back toward Central Minnesota This Afternoon. Plenty of cloud cover was found across our area Today, but some sunshine was beginning to appear in parts of our area This Afternoon. High temperatures Today were in the middle 70s to lower 80s thanks to the clouds. Dewpoints Today were on the muggy side with Afternoon values in the mid 60s to low 70s! PWS ranged from 1.20-1.70" late Today. Winds were variable under 12 mph.

Today's Upper Level Analysis:

Fast zonal flow coverered the Northern tier of the U.S. Today while a hot upper level ridge (5940 meters) encompassed much of the Central-Southern U.S. Several upper level disturbances embedded within the westerly flow aloft continued to drop east-southeast out of Westcentral Canada.

Tonight:

Isolated showers or thunderstorms could develop around Northern Minnesota and Northwest Wisconsin Tonight as there is some instability in place with late day CAPES around 1000 j/kg while Lifted Indices ranged from -2/-7 degrees C. This instability combined with the weak boundary near our area along with the deep moisture in place could be enough to trigger isolated convection over parts of our area Tonight, otherwise look for partly-mostly cloudy skies with patchy late night fog. Lows will be in the 50s and 60s with variable winds under 15 mph.

Tuesday and Tuesday Night:

A new cold front will start to approach our area from the west-northwest during this period. Some lingering moisture and instability along and ahead of that boundary could go on to produce spotty showers/thunderstorms around our area, but nothing widespread or severe is expected at this time. Highs on Tuesday will warm into the 80s with a few locales possibly reaching 90 degrees! Lows Tuesday Night will be in the 50s and 60s. Winds Tomorrow and Tomorrow Night will be out of the west under 20 mph.

Extended Forecast:

A rather potent upper level low will head into Hudson Bay and Ontario Province Canada from mid to late week. The 500 mb flow will amplify a bit and will become more northwest, possibly even a tad north-northwest toward Thursday-Friday. Right now it looks like the coolest air, consisting of 850 mb temperatures of +2/-2 degrees C will remain well to our north-northeast, but the southern flank of this cool airmass which will consist of H85 temps decreasing to around +6 degrees C will move into Northern Minnesota and Northwest Wisconsin later this week. We could see a few showers or thunderstorms in our area on Wednesday with mainly dry conditions on tap for Wednesday Night and Thursday.

High temperatures will be in the 70s and 80s on Wednesday with lows in the 50s and 60s. Thursday's high temps will be in the 60s and 70s with lows in the 40s and 50s.

5 Day Forecast for Duluth/Superior

.Tonight... Variable cloudiness. Humid. Patchy fog possible. Low 60 to 65. Wind variable around 12 mph.

.Tuesday... Warm and somewhat humid. Partly to mostly sunny. Showers or thunderstorms possible. High 83 to 88. Wind southwest at 10 to 20 mph. Chance of rain 20%.

.Tuesday Night... Partly cloudy. Low 60 to 65. Wind west at 10 to 15 mph.

.Wednesday... Partly sunny. High 78 to 83.

.Wednesday Night... Partly cloudy. Low 57 to 62.

.Thursday... Partly sunny. High 70 to 75.

.Thursday Night... Partly cloudy. Low 50 to 55.

.Friday... Partly cloudy. High 70 to 75.

Normal High Temperature Today 76 degrees

Normal Low Temperature Today 56 degrees

Tim