Lake Superior, 2009Marine Thunderstorm Winds in Lake Superior, August 17, 2009
August 17, 2009 · NWS MQT · 3 events in 2 counties and zones
Thunderstorms produced strong and gusty winds at Ontonagon and Freda on the evening of the 17th.
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- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
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- Heat and drought
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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.
Thunderstorms produced strong and gusty winds at Ontonagon and Freda on the evening of the 17th.
Marine Thunderstorm Wind, Black River to Ontonagon Mi
- When
- August 17, 9:20 PM EST to 9:23 PM EST
- Where
- Black River to Ontonagon Mi forecast zone, 6.06 mi SE of Union Bay Beach
- Measured
- 34 kt (39 mph) measured gust
- Reported by
- Mesonet
- Coordinates
- 46.877, -89.328
The Ontonagon GLOS site measured a wind gust of 34 knots.
Marine Thunderstorm Wind, Ontonagon to Upper Entrance of Portage Canal Mi
- When
- August 17, 9:20 PM EST to 9:23 PM EST
- Where
- Ontonagon to Upper Entrance of Portage Canal Mi forecast zone, 9.87 mi SW of Ten Mile Point
- Measured
- 34 kt (39 mph) measured gust
- Reported by
- Mesonet
- Coordinates
- 46.877, -89.328
The Ontonagon GLOS measured a wind gust of 34 knots.
Marine Thunderstorm Wind, Ontonagon to Upper Entrance of Portage Canal Mi
- When
- August 17, 10:34 PM EST to 11:37 PM EST
- Where
- Ontonagon to Upper Entrance of Portage Canal Mi forecast zone, 0.49 mi N of Beacon Hill
- Measured
- 49 kt (56 mph) measured gust
- Reported by
- COOP Observer
- Coordinates
- 47.137, -88.821
The observer at Freda measured a wind gust of 49 knots.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flash Flooding and Hail in Oklahoma, August 17 to 18, 2009$900,000 · 1.25 in hail · 15 events
- Damaging Wind in Michigan, August 17, 2009$250,000 · 56 kt wind · 1 event
- Hail and Damaging Winds in Texas, August 17, 2009$6,000 · 4 in hail · 39 events
- Tornado and Hail in Colorado, August 17, 2009$15,000 · EF0 · 30 events
- Damaging Winds and Lightning Strike in Illinois, August 17, 2009$42,000 · 52 kt wind · 5 events
- Hail in Colorado, August 17, 20092.5 in hail · 21 events
- Hail and Damaging Winds in Kansas, August 17, 20091 injured · $10,000 · 1.75 in hail · 10 events
- Hail and Lightning Strike in Kansas, August 17, 20091 injured · 1 in hail · 2 events
- Hail and Damaging Winds in Virginia, August 17, 2009$9,000 · 1 in hail · 6 events
- Flash Flooding in Kansas, August 17, 20095 events
- Hail in New Mexico, August 17, 20092 in hail · 4 events
- Hail in Oklahoma, August 17, 20091.5 in hail · 4 events
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 2026-10-01. Each event’s entry at NCEI: 191729, 191731, 191732.