Thursday, August 5, 2010

8/5/10: Thursday's Weather Report

Issued at 4:04 PM CDT, Thursday, August 5th, 2010

Weather tidbits:

*Today marks the 37th day in a row with a high temperature of at least 70 degrees at Duluth, Minnesota. This streak started back on June 30th and continued through all of July and has persisted into the first couple days of August.

Weather History:

On this date in 2001... A record high temperature of 93 degrees occurred at Duluth, MN.

On this date in 1992... A record low temperature of 40 degrees occurred at Duluth, MN.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today's Weather:

Partly-mostly sunny skies prevailed around our area Today with cooler high temperatures compared to the past few days. Highs Today ranged from the upper 60s in extreme Northern Minnesota with 70s elsewhere. Much drier air has also worked south into our area Today with dewpoints in the 40s and 50s while PWS ranged from 0.70-0.90". Winds Today were out of the north or west at 10-20 mph with a few higher gusts.

Today's 500 mb analysis:

Water vapor satellite imagery depicts a potent upper level low (5400-5460 meters) covering the North half of Ontario Province and Hudson Bay Canada late Today with a northwest flow aloft downstream of this system over the Upper Midwest.

Tonight through Friday Night:

The cold front that moved through our local area on Wednesday has moved well to our south Today, but a secondary cold front currently in Northwest Minnesota where a few light rain showers were occurring This Afternoon will settle south, passing through our area Tonight...This boundary could bring a few light rain showers or sprinkles or parts of our area Tonight, but nothing widespread or significant is expected. Otherwise high pressure will be in control of the Northern Plains/Upper Midwest's weather during this period with cool nighttime lows and pleasant daytime highs. 40s and 50s are expected in Northern Minnesota and Northwest Wisconsin Tonight and Friday Night with some 30s even possible in the typical cold spots. Highs on Friday will be in the 60s and 70s. Winds will be out of the north or west at 10-20 mph.

Extended Forecast:

High pressure will shift off to our east this weekend causing a southerly flow to develop on Saturday. Increasing amounts of moisture and some instability will work north into our area starting this weekend and possibly lingering through most of next week. A couple of surface boundaries will also be located across the Upper Midwest, and those boundaries working together with the building moisture/warmth/and instability should lead to some scattered showers and thunderstorms at times and perhaps some heavy rain and or severe weather from this weekend into next week. High temperatures Saturday and Sunday will be in the 70s and 80s with lows in the 50s and 60s.

Note: The Storm Prediction Center has outlooked Western-Southern parts of our area in a Slight Risk for severe thunderstorms Saturday Afternoon and Saturday Night. The risk area is generally along and south/southwest of a line from Cass Lake Minnesota to Moose Lake Minnesota to Hayward Wisconsin.

5 Day Forecast for Duluth/Superior

.Tonight... Partly to mostly cloudy. Low 50 to 55. Wind northwest at 10 to 20 mph.

.Friday... Partly cloudy. High 72 to 77. Wind northwest at 10 to 20 mph.

.Friday Night... Partly cloudy. Low 50 to 55. Wind variable around 12 mph.

.Saturday... Partly sunny. Showers or thunderstorms possible. High 75 to 80. Chance of rain 20%.

.Saturday Night... Mostly cloudy. Showers or thunderstorms possible. Low 58 to 63. Chance of rain 30%.

.Sunday... Partly sunny. Showers or thunderstorms possible. High 75 to 80. Chance of rain 20%.

.Sunday Night... Partly cloudy. Low 58 to 63.

.Monday... Partly sunny. High 78 to 83.

Normal High Temperature Today 76 degrees

Normal Low Temperature Today 55 degrees