7/31/10: Saturday’s Weather Report

Issued at 5:34 PM CDT, Saturday, July 31st, 2010

Friday and early Saturday rainfall totals (7-30/7-31) from Northern Minnesota and Northwest Wisconsin. Source: NWS Duluth, MN.

Duluth MN: 0.04″

International Falls MN: 0.22″

Brainerd MN: 0.96″

Hibbing MN: 0.07″

Ashland WI: 0.17″

Cook MN: 0.51″

Kabetogama MN: 0.22″

Northome MN: 0.68″

2 miles South of Tower MN: 0.70″

Embarrass MN: 0.50″

Littlefork MN: 0.22″

Floodwood MN: 0.22″

9 miles North of Bayfield WI: 0.65″

5 miles Northwest of Washburn WI: 0.63″

Gurney WI: 0.85″

Weather History:

On this date in 2006…A record high temperature of 95 degrees occurred at Duluth, Minnesota.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today’s Weather:

The widespread low cloudiness which developed across our area earlier Today finally gave way to some sunshine from west to east by This Afternoon…Once the sun came out, temperatures warmed up nicely with high temperatures in the upper 70s to lower 80s with slightly cooler readings at the head of Lake Superior. Dewpoints late Today were in the 55-64 degree range with PWS of 0.90-1.20″. Winds Today were variable or calm.

Today’s Upper Level Analysis:

Northwest 500 mb flow covered the Upper Midwest Today with an upper level ridge of high pressure (5880-5940 meters) stretching from the Central-Southern Rockies through the Central-Southern Plains and through the Southeast U.S. Several upper level disturbances are embedded within the fast flow aloft across the Western U.S. and Northern tier of the U.S. and through portions of Canda with movement of those systems toward the east or east-southeast.

Tonight:

Partly-mostly cloudy skies will be found across our area Tonight. A few showers or thunderstorms are possible later in the night, mainly in Northern and Western areas. No severe weather is anticipated Tonight due to limited amounts of instability that will be over our area Tonight. Lows will be in the 50s and 60s with winds turning to the south under 15 mph. Patchy fog could also develop over Northern Minnesota and Northwest Wisconsin later in the night.

Sunday and Sunday Night:

Low pressure will be centered over the Western High Plains/Northern Plains region Tomorrow and Tomorrow Night. A warm front attached to this low will extend E-SE into Central Minnesota on Sunday, this boundary is then expected to lift north Sunday Night. A 35 knot SW 850 mb jet will be in place across Minnesota during this period and this will result in a warm/moist advection pattern overspreading our area. Dewpoints should reach the 60s with PWS of 1.25-1.75″. We should also see some instability develop around our area with CAPES by Sunday Afternoon-Night increasing to around 1000 j/kg while Lifted Indices drop to around -3 degrees C. Scattered showers or thunderstorms will be possible over all of Northern Minnesota and Northwest Wisconsin Sunday and Sunday Night. A few of these storms could become severe especially west of a line from Crane Lake to Aitkin Minnesota. Large hail and damaging winds will be the main threats along with the usual heavy downpours and dangerous lightning strikes!

Partly-mostly cloudy skies will be found in our area during this period with highs Tomorrow in the 70s and 80s with lows Tomorrow Night mainly in the 60s. Winds Sunday and Sunday Night will be out of the south, southwest or east under 20 mph.

Extended Forecast:

A warm, moist and unstable airmass will remain over our area on Monday as a cold front settles south-east through the Upper Midwest. CAPES of 1500-3000 j/kg with Lifted Indices of -3/-5 degrees C combined with fast winds aloft and around 30-40 knots of 0-6 KM and Effective Bulk Shear could lead to the development of scattered showers and thunderstorms and possibly some severe weather Monday Afternoon and Evening across Northwest Wisconsin and Eastern Minnesota.

It looks like things will dry out Monday Night and Tuesday as slightly drier and more stable air works into our area while the main surface boundary sets-up farther to our south.

High temperatures for Monday and Tuesday will be mainly in the 80s with lows in the 50s and 60s both nights.

5 Day Forecast for Duluth/Superior

.Tonight… Partly to mostly cloudy. Low 58 to 63. Wind variable around 12 mph.

.Sunday… More humid. Variable cloudiness. Showers or thunderstorms possible. High 78 to 83. Wind south at 10 to 20 mph. Chance of rain 30%.

.Sunday Night… Humid with scattered showers or thunderstorms. Mostly cloudy. Low 60 to 65. Wind south to southeast at 10 to 15 mph. Chance of rain 60%.

.Monday… Humid. Showers or thunderstorms possible. Partly sunny. High 80 to 85. Chance of rain 30%.

.Monday Night… Decreasing cloudiness. Low 60 to 65.

.Tuesday… Partly cloudy. High 80 to 85.

.Tuesday Night… Partly cloudy. Low 58 to 63.

.Wednesday… Partly cloudy. High 78 to 83.

Normal High Temperature Tomorrow 77 degrees

Normal Low Temperature Tomorrow 56 degrees

Tim

7/30/10: Friday’s Weather Report

Issued at 4:15 PM CDT, Friday, July 30th, 2010

UPDATED INFORMATION FROM TUESDAY’S (7/27/10) SEVERE WEATHER OUTBREAK…SOURCE: NWS DULUTH, MINNESOTA.

*3 confirmed tornadoes in Northwest Wisconsin on Tuesday, July 27th, 2010.

*Morse WI tornado (Ashland County) 6:24 PM CDT: Preliminary EF-1 rating with wind speeds of 86-110 mph.

*Eastern Ashland County Wisconsin tornado (7:12 PM CDT) Preliminary EF-0 rating with wind speeds of 65-85 mph.

*Turtle Flambeau Flowage tornado (Iron County) Start time: 7:20 PM CDT, 9.7 miles Southwest of Mercer Wisconsin. End time: 7:26 PM CDT, 6.5 miles Southwest of Mercer Wisconsin. Preliminary EF-1 rating with wind speeds of 86-110 mph. Path length: 4.8 miles. Max width: 3/8 miles or 660 yards.

July 2010, record setting at Duluth, MN. Source: NWS

Every day so far in July 2010 has featured a high temperature of at least 70 degrees at Duluth Minnesota. This is only the 2nd time in Duluth weather history which goes back 137 years for such a feat to occur. The last time this happened was in July of 1988. Even the warmest July on record (2006) featured one day where the high temperature failed to reach 70 degrees, that occurred on July 10th, 2006 when the maximum temperature was just 65 degrees.

Weather History:

On this date in 1995 and in previous years…A record high temperature of 94 degrees occurred at Duluth Minnesota.

On this date in 1992 and previous years…A record low temperature of 42 degrees occurred at Duluth Minnesota.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today’s Weather:

Moisture has been increasing across our area Today as southerly winds develop on the back side of an area of high pressure which was centered over the Eastern Great Lakes This Afternoon. Dewpoints late Today were generally in the lower to middle 60s across our local area with PWS of 1.20-1.60″. Mostly cloudy skies were found in our area Today with scattered showers affecting parts of our area. High temperatures Today due to the clouds and scattered rain stayed in the 65-75 degree range with south or east winds under 20 mph.

Today’s Upper Level Analysis:

Northwest flow aloft covered the Upper Midwest Today per water vapor satellite imagery and RUC model analysis. An upper level ridge was in place across the Central-Southern Rockies through the Central-Southern Plains and the Southeast U.S. A couple of disturbances embedded within the fast W-NW 500 mb flow were dropping southeast through Western-Central Canada down through the Northern Plains/Upper Midwest.

Tonight:

Scattered showers and mostly cloudy skies with areas of fog will be the rule across Northern Minnesota and Northwest Wisconsin Tonight…A warm front sitting near the Eastern Dakotas late Today combined with some disturbances heading southeast into our area will lead to some rain at times Tonight. There is some instability around portions of our area late This Afternoon with meso-analysis showing CAPES of around 500-1000 j/kg with Lifted Indicies of -1/-4 degrees C. This will be enough to support a few thunderstorms with brief heavy downpours and occasional lightning strikes Tonight, but severe weather is not expected. Lows Tonight will be in the 50s and 60s with winds out of the south, west, or east under 15 mph.

Saturday and Saturday Night:

W/NW flow aloft will continue during this period. Some instability will remain in place with CAPES maxing out around 1000 j/kg with Lifted Indices as low as -3 degrees C. Any weak impulse dropping southeast into the Upper Midwest will tap into this instability and will lead to a few showers or thunderstorms in Northern Minnesota and Northwest Wisconsin Tomorrow and Tomorrow Night, otherwise expect partly-mostly cloudy skies during this period with highs Saturday in the 70s and 80s with lows Saturday Night in the 50s and 60s. Winds during this period will be out of the west, south, or east under 15 mph.

Extended Forecast:

An area of low pressure with it’s warm front and cold front is forecast to track across the Northern Plains and Upper Midwest from Sunday into Monday. The forecast models Today and over the past few days have differed on how rapidly to spread showers/thunderstorms into our area. The NAM-WRF model has a faster solution compared to most of the other models Today, a faster solution would result in rain chances Sunday through Monday while a slower solution would result in the better rain chances occurring from Sunday Evening/Overnight into Monday. The prospects for severe weather seem to be diminishing a bit compared to 24 hours ago for our local area, but this could still change. A southwest low level jet >30 knots is expected to be in place ahead of this system late this weekend, this along with favorable shear and winds aloft could still result in some severe weather should the instability increase with future model runs.

High temperatures Sunday and Monday will be in the 70s and 80s across our area with low temperatures in the 50s and 60s both nights.

5 Day Forecast for Duluth/Superior

.Tonight… Mostly cloudy with areas of fog. Scattered showers ending Overnight. An isolated thunderstorm also possible. Low 56 to 61. Wind east to southeast at 5 to 15 mph.

.Saturday… Partly sunny. Showers or thunderstorms possible. High 75 to 80. Wind variable at 5 to 15 mph. Chance of rain 20%.

.Saturday Night… Partly to mostly cloudy. Low 57 to 62. Wind variable around 12 mph.

.Sunday… Partly sunny. High 75 to 80.

.Sunday Night… Mostly cloudy. Showers or thunderstorms possible. Low 60 to 65. Chance of rain 30%.

.Monday… Showers or thunderstorms possible. Mostly cloudy. High 75 to 80. Chance of rain 30%.

.Monday Night… Becoming partly cloudy. Low 60 to 65.

.Tuesday… Partly cloudy. High 80 to 85.

Normal High Temperature Today 76 degrees

Normal Low Temperature Today 56 degrees

Tim

7/29/10: Thursday’s Weather Report

Issued at 4:43 PM CDT, Thursday, July 29th, 2010

…2 TORNADOES CONFIRMED IN NORTHWEST WISCONSIN FROM TUESDAY EVENING, JULY 27TH, 2010…

The National Weather Service in Duluth, Minnesota has confirmed that at least two tornadoes touched down late Tuesday Afternoon/Evening in Northwest Wisconsin.

***UPDATE AS OF 4:40 PM CDT: NWS DULUTH, MN has confirmed that a third tornado touched down in Ashland County Wisconsin Tuesday Evening, July 27th, 2010***

Source NWS Duluth, MN:

*A tornado touched down in the Turtle Flambeau Flowage area, near Springstead Landing in Iron County Wisconsin. The tornado in Iron County on Tuesday the 27th of July was the first observed tornado in 4 decades (40 years)!

*The second tornado touched down just north of Highway F along Roddis Lane Road in far Eastern Ashland County Wisconsin. The tornado in Ashland County on Tuesday the 27th of July was the first observed tornado in that area since May 1998!

14 warnings including 4 tornado warnings and 10 severe thunderstorm warnings were issued by the NWS Duluth, MN on Tuesday, July 27th, 2010. There was a total of 30 severe weather reports across Northwest Wisconsin and Eastcentral Minnesota on Tuesday with an additional 17 non-severe weather reports.

Local storm report…Per NWS Duluth, MN:

5:00 PM CDT 7/27/10: Lightning. A teenage boy was struck by lightning while jogging on Skyline Parkway, near Spirit Mountain, 9 miles Southwest of Duluth Minnesota.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin:

The weather pattern from Tonight through early next week will be characterized by a fast northwest or west-northwest flow aloft. Several upper level disturbances embedded within this flow will find their way into the Northern Plains and Upper Midwest over the next 5 days. Those systems combined with increasing amounts of moisture and instability will lead to the development of scattered showers or thunderstorms in Northern Minnesota and Northwest Wisconsin especially from Friday into Friday Evening, and again on Saturday, and then again sometime during the Sunday-Monday time frame. With favorable winds aloft, there could be a few severe thunderstorms around portions of our local area…Especially by this weekend into next Monday the way it looks now as enough instability and moisture should return north by that time to possibly produce a slightly higher chance for a few severe thunderstorms.

Low temperatures Tonight, Friday Night, Saturday Night and Sunday Night will be in the 50s and 60s with high temperatures in the 60s and 70s on Friday with 70s and 80s this weekend and Monday of next week.

Winds Tonight through Friday Night will be out of the south, west, or east under 20 mph.

5 Day Forecast for Duluth/Superior

.Tonight… Partly to mostly cloudy. Low 56 to 61. Wind south around 12 mph.

.Friday… Considerable cloudiness. Scattered showers developing…Isolated thunderstorms also possible. High 70 to 75. Wind south to southeast at 5 to 15 mph. Chance of rain 50%.

.Friday Night… Scattered showers possible, especially during the Evening…Isolated thunderstorms also possible. Mostly cloudy. Low 57 to 62. Wind variable around 12 mph. Chance of rain 50%.

.Saturday… Partly sunny. Showers or thunderstorms possible. High 75 to 80. Chance of rain 30%.

.Saturday Night… Partly to mostly cloudy. Low 57 to 62.

.Sunday… Partly sunny. High 75 to 80.

.Sunday Night… Mostly cloudy. Showers or thunderstorms possible. Low 60 to 65. Chance of rain 30%.

.Monday… Showers or thunderstorms possible. Mostly cloudy. High 75 to 80. Chance of rain 30%.

Normal High Temperature Today 77 degrees

Normal Low Temperature Today 56 degrees

Tim

7/28/10: Wednesday’s Weather Report

Issued at 3:15 PM CDT, Wednesday, July 28th, 2010

Another outbreak of severe thunderstorms and very heavy rainfall hit portions of Eastcentral Minnesota and most of Northwest Wisconsin on Tuesday, July 27th, 2010.

Local storm reports.
Source: NWS Duluth, MN.

*4:20 PM CDT 7/27/10: Thunderstorm Wind Damage. 2 miles North of Aitkin MN (Aitkin County) Trees down near Aitkin. Reported wind gusts of 50 mph.

*4:58 PM CDT 7/27/10: Thunderstorm Wind Damage. Maple WI (Douglas County) Several powerlines down.

*5:00 PM CDT 7/27/10: 1.50″ diameter hail. Proctor MN (St. Louis County)

*5:00 PM CDT 7/27/10: Thunderstorm Wind Damage. 1 mile North of Blueberry WI (Douglas County) 3 large trees blown down.

*5:20 PM CDT 7/27/10: 1.00″ diameter hail. 2 miles Southeast of Iron River WI (Bayfield County)

*5:20 PM CDT 7/27/10: Thunderstorm Wind Damage. 5 miles Southeast of Iron River WI (Bayfield County) Trees down on RV trading camper at Twin Bear Campground.

*5:30 PM CDT 7/27/10: 1.75″ diameter hail. 8 miles Southeast of Iron River WI (Bayfield County) Hail up to the size of golfballs on Scenic Drive rest area, also in nearby areas along Highway H. Some trees blown down and a few snapped off including red pines and oaks.

*5:30 PM CDT 7/27/10: 1.75″ diameter hail. 6 miles Southwest of Ino WI (Bayfield County) Quarter to golfball size hail dented 3 vehicles and cracked a windshield on a police car as it was driven by extremely strong winds. Tree damage also noted.

*5:35 PM CDT 7/27/10: 2.75″ diameter hail. 3 miles South of Ino WI (Bayfield County) A combination of severe wind and hail causing damage. Wheat and corn fields destroyed along County Highway E. Also, shingles blown from a roof and siding damage to a house. Barn nearly collapsed. Reports of spiky golfball to baseball size hail. Highway department had to scrape roadway clear of several inches of wet leaves that got stripped from trees by wind driven hail.

*5:45 PM CDT 7/27/10: Thunderstorm Wind Damage. Benoit WI (Bayfield County) Roof blown off of a barn.

*5:48 PM CDT 7/27/10: 1.00″ diameter hail. Mason WI (Bayfield County) A few trees blown down in the area.

*6:21 PM CDT 7/27/10: Tornado. Morse WI (Ashland County) Unconfirmed public report of a tornado.

*6:10 PM CDT 7/27/10: 0.50″ diameter hail. High Bridge WI (Ashland County)

*6:14 PM CDT 7/27/10: 0.75″ diameter hail. High Bridge WI (Ashland County)

*6:17 PM CDT 7/27/10: 1.00″ diameter hail. High Bridge WI (Ashland County)

*6:19 PM CDT 7/27/10: 1.75″ diameter hail. High Bridge WI (Ashland County)

*6:22 PM CDT 7/27/10: 1.00″ diameter hail. 2 miles North of Mellen WI (Ashland County)

*6:26 PM CDT 7/27/10: 1.50″ diameter hail. 2 miles North of Mellen WI (Ashland County)

*6:28 PM CDT 7/27/10: Thunderstorm Wind Damage. 1 mile North of Glidden WI (Ashland County) Tree down.

*6:34 PM CDT 7/27/10: Thunderstorm Wind Damage. 6 miles West of Trego WI (Washburn County) Several trees down 6″ in diameter.

*6:50 PM CDT 7/27/10: 1.75″ diameter hail. 10 miles North-Northeast of Hayward WI (Sawyer County)

*6:53 PM CDT 7/27/10: Thunderstorm Wind Damage. Ino WI (Bayfield County) 2 foot diameter tree snapped above ground.

*7:27 PM CDT 7/27/10: Thunderstorm Wind Damage. Turtle Flambeau Flowage WI (Iron County) Numerous trees down reported by Iron County Sherrif.

*7:28 PM CDT 7/27/10: Thunderstorm Wind Damage. 2 miles North of Stone Lake WI (Washburn County) Power lines down along County Highway A.

*7:30 PM CDT 7/27/10: Thunderstorm Wind Damage. Mercer WI (Iron County) Numerous trees down along Murray Landing Road. Power lines also down. Roads blocked in the area.

*7:30 PM CDT 7/27/10: Thunderstorm Wind Damage. Stone Lake WI (Sawyer County) Large tree down on Bouten Road.

*7:30 PM CDT 7/27/10: Thunderstorm Wind Damage. 2 miles Northeast of Spooner WI (Washburn County) Large tree limb on cabin.

*7:40 PM CDT 7/27/10: Thunderstorm Wind Damage. Turtle Flambeau Flowage WI (Iron County) ***6 INJURIES*** Preliminary report. Rescues were in progress on the Islands at the time of the event.

*7:52 PM CDT 7/27/10: Thunderstorm Wind Damage. Birchwood WI (Washburn County) Large pine tree fell on cabin and made a hole in the roof.

*8:00 PM CDT 7/27/10: Thunderstorm Wind Damage. Park Falls WI (Price County) Several trees down.

*8:06 PM CDT 7/27/10: Thunderstorm Wind Damage. 2 miles North-Northwest of Radisson WI (Sawyer County) Large tree blocking Highway 70 and 27. Blinding rain as well.

Rainfall totals from Northern Minnesota and Northwest Wisconsin from 7 AM CDT Tuesday ending around 7 AM CDT Wednesday. Source: NWS Duluth, MN.

St. Louis County:

Duluth MN: 0.71″

Hibbing MN: 0.22″

Embarrass MN: 0.15″

Koochiching County:

Northome MN: 0.22″

Cass County:

Cass Lake MN: 0.34″

Crow Wing County:

Brainerd MN: 0.83″

Pine County:

Bruno MN: 2.21″

6 miles West of Sandstone MN: 1.64″

4 miles South of Bruno MN: 2.60″

Hinckley MN: 1.47″

Bayfield County:

5 miles Northwest of Washburn WI: 0.67″

Burnett County:

Webster WI: 1.13″

Ashland County:

Ashland WI: 1.35″

Butternut WI: 1.84″

Sawyer County:

Hayward WI: 3.13″

Iron County:

Upson WI: 3.15″

Gurney WI: 1.78″

Here are some additional rainfall totals from Tuesday Evening July 27th, 2010. Source: NWS Duluth, MN.

Askov MN (Pine County) 1.71″ Fell in 2 hours.

1 mile Southwest of Hinckley MN (Pine County) 2.00″. Fell in 50 minutes.

Minong WI (Washburn County) 2.57″. 2.13″ fell between 7:00-8:00 PM CDT.

Upson WI (Iron County) 2.85″

6 miles West of Trego WI (Washburn County) 1.50″, fell between 7:10-7:40 PM CDT.

Hayward WI (Sawyer County) 2.68″, fell between 6:56-7:56 PM CDT.

Gile WI (Iron County) 3.15″

11 miles West-Northwest of Drummond WI (Bayfield County) 2.10″. 1.36″ fell between 7:00-8:00 PM CDT.

Here are some rainfall totals around Northern Minnesota from late Monday Night/early Tuesday Morning. Source: NWS Duluth, MN.

International Falls MN: 0.27″

Cass Lake MN: 0.12″

Cook MN: 0.22″

Kabetogama MN: 0.35″

2 miles South of Tower MN: 0.18″

4 miles East of Island Lake MN: 0.55″

Weather tidbit:
Source: NWS Aberdeen SD&TWC.

*On Friday, July 23rd, 2010 at 6:10 PM: 4.25″ diameter hail (Softball size) fell at Vivian South Dakota (Lyman County) The diameter of this hail was 8.00″, the record is 7.00″. The circumference was 18.50″, the record is 18.75″. The weight of this hail was 1.92 pounds, the record is 1.67 pounds.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today’s Weather:

High pressure of 1020 mb was building east from the Dakotas Today. A broken field of cumulus clouds developed This Afternoon over our local area, otherwise skies were partly to mostly sunny Today with much lower humidity and pleasant temperatures. Highs Today were in the 70s with a few locales inching close to 80 degrees. Dewpoints This Afternoon were generally in the 50s with PWS around 0.80″. Winds Today were out of the west or northwest at 10-25 mph.

Today’s Upper Level Analysis:

Northwest 500 mb flow was in place in the Upper Midwest Today as Tuesday’s potent upper level trough/upper level low move quickly off toward the east through the Northern Ontario/Southern Hudson Bay/Western Quebec Province areas.

Tonight:

Clear to partly cloudy skies will be found in Northern Minnesota and Northwest Wisconsin with high pressure remaining off to our west while a secondary cold front which extended from Southern Ontario Province to just north of Lake Superior around 1 PM Today drops south and begins to weaken as it does so. Slightly cooler air was found behind that secondary boundary where Afternoon 850 mb temps of +8 degrees C were found, while out ahead of that boundary 850 mb temps were sitting around +12 degrees C late Today. Lows Tonight will be in the 50s, but a few 40s can’t be ruled out in the typical cool spots. Winds will be out of the north or west under 15 mph.

Thursday and Thursday Night:

An area of high pressure will pass through Upper Midwest on Thursday before it starts to exit to our south/east by Thursday Night. Partly-mostly sunny skies are forecast on Thursday with highs in the 70s to lower 80s along with low humidity and winds from the west, north, or south under 20 mph. Partly to mostly cloudy skies are expected for Thursday Night with lows in the 50s to around 60 degrees, winds will be out of the south or east under 15 mph. Moisture and instability will begin to increase to our west Tomorrow Night as low pressure moves into the Western High Plains/Northern Plains region. Showers and thunderstorms are forecast to develop over the Dakotas Tomorrow Evening, this activity will then spread east-southeast Thursday Night and could clip the Western-Southern portions of our local area.

Extended Forecast:

Upper level flow will be out of the northwest from Friday into early next week. Low pressure systems/disturbances embedded within this flow will drop southeast across the Northern Plains and Upper Midwest on occasion, those systems combined with enough moisture and instability in place will lead to scattered showers or thunderstorms from time to time starting on Friday and lingering through early next week. There might be some severe weather as well, but this would depend on the timing of these disturbances, as well as the amount of instability and moisture that can surge north to meet up with these systems. High temperatures for Friday and Saturday will be mainly in the 70s with lows both nights in the 50s to around 60 degrees.

5 Day Forecast for Duluth/Superior

.Tonight… Clear to partly cloudy. Low 53 to 58. Wind west to northwest at 5 to 15 mph.

.Thursday… Partly cloudy. High 76 to 81. Wind west at 10 to 15 mph.

.Thursday Night… Partly to mostly cloudy. Low 55 to 60. Wind becoming south to southeast at 5 to 15 mph.

.Friday… A few showers or thunderstorms possible. Variable cloudiness. High 70 to 75. Chance of rain 30%.

.Friday Night… Showers or thunderstorms possible. Partly to mostly cloudy. Low 55 to 60. Chance of rain 20%.

.Saturday… Partly sunny. High 75 to 80.

.Saturday Night… Partly to mostly cloudy. Low 55 to 60.

.Sunday… Partly sunny. High 75 to 80.

Normal High Temperature Today 77 degrees

Normal Low Temperature Today 56 degrees

Tim

7/27/10: Tuesday’s Weather Report

Issued at 8:02 PM CDT, Tuesday, July 27th, 2010

…All headlines issued by the National Weather Service Duluth, Minnesota…

Weather tidbits:

*1, possibly 2 people were struck by lightning in Duluth Minnesota late This Afternoon.

*The Aerial Lift Bridge in Duluth Minnesota was struck by lightning late Today which caused the bridge to stay up for over an hour. As of 8 PM, the lift bridge was back up and running.

*Reports of large hail and areas of wind damage around the Twin Ports with the severe thunderstorms that moved thru the city around 5 PM Today.

Forecast Discussion for Northeast Minnesota and Northwest Wisconsin

Today’s Weather:

Scattered showers and thunderstorms some of which were severe developed late last night over Eastern North Dakota with even a report of a tornado near Fargo North Dakota around 2 AM last night…This activity moved through Western-Southern parts of our local area This Morning with a few severe thunderstorm warnings issued for parts of Cass, Crow Wing and Aitkin Counties Minnesota before 9 AM.

A persistent band of scattered showers and a few thunderstorms lingered most of the day in a west-east band across Central-Southern parts of our area which kept the greatest instability/moisture/and warm air a bit more south then what was forecasted 24 hours ago thanks to the extra cloud cover and scattered precipitation.

In the end the amount of clouds and precip really didn’t have much affect on what happened late Today as scattered strong to severe thunderstorms erupted over portions of Eastcentral Minnesota with a line of strong to severe thunderstorms continuing to push south-east across Northwestern Wisconsin This Evening. The main threats out of the storms late Today have been from large hail and damaging winds along with torrential rainfall which has led to some localized flooding problems. Dangerous cloud to ground lightning strikes have also been occurring with these storms late Today. The threat for tornadoes never really did materalize This Afternoon due to the storms lining out rather quickly instead of remaining individual supercells.

Mostly cloudy to partly sunny skies covered our local area Today with high temperatures running in the 70s, but middle and upper 80s were common in Southern areas. Dewpoints Today were in the 65-70 degree range with PWS from 1.30-2.10″! Winds Today were out of the south or east under 20 mph. Surface map as of 7 PM featured a cold front which extended from Western Lake Superior into Northwest Wisconsin to Southern Minnesota.

This Evening’s Upper Level Analysis:

A vigorous upper level trough was moving east into Central Canada This Evening per water vapor satellite imagery. A westerly flow aloft was in place over the Upper Midwest downstream of this system with a 100 knot upper level jet located over Western Ontario Province per RUC model analysis along with a widespread area of 30-60 meter 12 hour 500 mb height falls over the Upper Midwest and Central Canada.

Tonight:

*Tornado Watch* continues until 11 PM CDT for Ashland, Iron, Washburn, Sawyer and Price Counties in Northwest Wisconsin…

*Urban and Small Stream Flood Advisory* is in effect until 11 PM CDT Tonight for Central Aitkin, Eastcentral Crow Wing, Carlton, Southeast St. Louis and Northwest Douglas Counties.

*Urban and Small Stream Flood Advisory* is in effect until 1:45 AM CDT Wednesday for Eastern Pine, Southern Ashland, Southern Bayfield, Northern Burnett, Southern Douglas, Iron, Northwest Sawyer and Northern Washburn Counties.

A cold front will exit Northwest Wisconsin before Midnight. The threat for showers and thunderstorms, severe weather, and heavy rainfall will end from northwest to southeast through Midnight as this boundary exits the area. Partly-mostly cloudy skies will be found across Northern Minnesota and Northwest Wisconsin Tonight with lows in the 50s and 60s along with lowering humidity by dawn. Winds will shift to the north and west at 10-20 mph.

Wednesday and Wednesday Night:

A much quieter weather pattern will take over during this period as high pressure builds east out of the Northern Rockies. Partly-mostly sunny skies with highs in the 70s and 80s along with much lower humidity can be expected on Wednesday with mostly clear skies Wednesday Night with lows mainly in the 50s. Winds will be out of the northwest or west at 10-25 mph Tomorrow and under 15 mph Tomorrow Night.

Extended Forecast:

The period from Thursday through early next week will be highlighted by a W/NW flow aloft across the Upper Midwest with an upper level ridge of high pressure centered well to our south. A couple of fast moving low pressure systems/disturbances embedded within this fast W/NW 500 mb flow will pass through the Northern Plains and Upper Midwest on occasion, and those systems could bring occasional shower/thunderstorm clusters to portions of Minnesota from Thursday into early next week. At this time it appears that the greatest threat for seeing this activity will be to our west-south at least through Saturday. High temperatures Thursday and Friday will be in the 70s to around 80 degrees with lows in the 50s and 60s both nights.

5 Day Forecast for Duluth/Superior

*URBAN AND SMALL STREAM FLOOD ADVISORY* IN EFFECT UNTIL 11:00 PM CDT TONIGHT.

.Tonight… Skies becoming partly cloudy. Turning less humid. Low 58 to 63. Wind becoming west at 10 to 20 mph.

.Wednesday… Breezy and less humid. Partly cloudy. High 77 to 82. Wind west at 15 to 25 mph.

.Wednesday Night… Mostly clear. Low 53 to 58. Wind northwest at 10 to 15 mph.

.Thursday… Partly cloudy. High 75 to 80.

.Thursday Night… Partly cloudy. Low 53 to 58.

.Friday… Partly sunny. High 73 to 78.

.Friday Night… Partly to mostly cloudy. Low 56 to 61.

.Saturday… Partly sunny. High 75 to 80.

Normal High Temperature Tomorrow 77 degrees

Normal Low Temperature Tomorrow 56 degrees

Tim