Marine Thunderstorm Wind, Duluth Mn to Pt Wing Wi
- When
- August 31, 9:35 PM CST to 9:36 PM CST
- Where
- Duluth Mn to Pt Wing Wi forecast zone, Sky Harbor Airport
- Measured
- 36 kt (41 mph) measured gust
- Reported by
- AWOS
- Coordinates
- 46.720, -92.040
Marine Thunderstorm Wind in Lake Superior, August 31, 2018
Warm air advection ahead of a cold front moving from the Red River Valley into central Minnesota through the day led to the development of storms. Strong winds were seen with these storms as they moved over Lake Superior.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS DLH wrote it up.
Warm air advection ahead of a cold front moving from the Red River Valley into central Minnesota through the day led to the development of storms. Strong winds were seen with these storms as they moved over Lake Superior.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Duluth, MN wrote its last area forecast discussion before the first event at Aug 31, 5:43 PM CST, 3 hours 52 minutes earlier.
Area forecast discussion, Aug 31, 5:43 PM CST, 3 hours 52 minutes before
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</html>Hazardous weather outlook, Aug 31, 1:49 PM CST, 7 hours 46 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Duluth MN 249 PM CDT Fri Aug 31 2018 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-011130- Koochiching-North St. Louis-Northern Cook/Northern Lake- North Itasca-Central St. Louis-Southern Lake/North Shore- Southern Cook/North Shore-North Cass-South Itasca-South Cass- Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis- Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price- 249 PM CDT Fri Aug 31 2018 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...This afternoon and Tonight Thunderstorms are likely this afternoon through early Saturday morning over much of the Northland. Some storms will be strong to severe with large hail, damaging wind gusts, torrential rainfall, and frequent lightning. A tornado cannot be entirely ruled out. The heavy rain could lead to flash flooding, mainly over northwest Wisconsin and adjacent counties of northeast Minnesota where soils are nearly saturated. Heavy rain has also become more likely along portions of the north shore, especially between the crest of the ridge and the lake. A Flash Flood Watch remains in effect until 7 AM Saturday and now includes the north shore and Price County Wisconsin. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Several rounds of thunderstorms are expected during the upcoming week. Repeated heavy rainfall may cause flooding. Some of storms may be severe. .SPOTTER INFORMATION STATEMENT... SKYWARN Spotters will be needed tonight. LSZ121-140>148-011130- Bayfield to Oak Point WI-Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- Taconite Harbor to Silver Bay Harbor MN- Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI- 249 PM CDT Fri Aug 31 2018 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...This afternoon and Tonight Thunderstorms are possible over the nearshore waters of western Lake Superior this afternoon through early Saturday morning, with some strong to severe thunderstorms possible. The main threats will be large hail and wind gusts greater than 35 knots, along with frequent lightning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Several rounds of thunderstorms are expected from Sunday through the upcoming week. Some of the storms may be strong to severe. Huyck/DAP More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
In the hours before
Local storm report, Aug 31, 8:18 PM CST, 1 hour 17 minutes before
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</html>Local storm report, Aug 31, 8:24 PM CST, 1 hour 11 minutes before
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</html>Local storm report, Aug 31, 8:31 PM CST, 1 hour 4 minutes before
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</html>Local storm report, Aug 31, 9:02 PM CST, 33 minutes before
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</html>Special weather statement, Aug 31, 9:11 PM CST, 24 minutes before
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</html>Local storm report, Aug 31, 9:13 PM CST, 22 minutes before
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</html>The radar
The Duluth radar (KDLH), 18 km away, was scanning. The volume nearest the first event began at 03:34 UTC.
Event by event
1 marine thunderstorm wind. Local standard time, as filed.
What these are
- Marine Thunderstorm Wind
- Thunderstorm winds of 34 knots or more over coastal or lake waters.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flooding and Flooding in Maryland, August 31, 2018
- Lightning Strike and Heavy Rain in Kentucky, August 31, 2018
- Hail and Damaging Winds in Minnesota, August 31, 2018
- Hail in Minnesota, August 31, 2018
- Hail and Damaging Winds in Virginia, August 31, 2018
- Hail and Damaging Winds in Nebraska, August 31, 2018
- Flash Flooding and Damaging Winds in Delaware, August 31, 2018
- Hail in North Dakota, August 31, 2018
- Hail and Strong Wind in Minnesota, August 31, 2018
- Hail in Wisconsin, August 31, 2018
- Hail in Iowa, August 31, 2018
- Hail and Damaging Wind in Kansas, August 31, 2018
More
Every storm in Lake Superior in 2018Every state in 2018This day in weather history
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 779855.