Marine Thunderstorm Winds in Lake St. Clair, August 23, 2023

Name: Marine Thunderstorm Winds in Lake St. Clair, August 23, 2023
Start: 2023-08-23T21:30
End: 2023-08-23T22:39
Location: Lake St. Clair

August 23, 2023 · NWS DTX · 4 events in 2 counties and zones

Thunderstorms moving through Lake St. Clair and Detroit River produced wind gusts in excess of 50 knots.

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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 4

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 DTX wrote it up.

Thunderstorms moving through Lake St. Clair and Detroit River produced wind gusts in excess of 50 knots.

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 Detroit, MI wrote its last area forecast discussion before the first event at Aug 23, 9:03 PM EST, 27 minutes earlier.

Area forecast discussion, Aug 23, 9:03 PM EST, 27 minutes before

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Hazardous weather outlook, Aug 23, 2:57 PM EST, 6 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
357 PM EDT Wed Aug 23 2023

MIZ075-076-082-083-240900-
Washtenaw-Wayne-Lenawee-Monroe-
357 PM EDT Wed Aug 23 2023

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms will be possible at times this evening into
tonight. There will be the potential for some severe storms within
this activity with the main hazards being hail to 1.5 inches in
diameter, damaging wind gusts, and locally heavy rainfall that may
lead to flooding concerns. An isolated tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Heat Advisory has been issued for Thursday. Refer to the latest
weather message and forecasts for additional information.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

MIZ047>049-053>055-060>063-068>070-240900-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-
357 PM EDT Wed Aug 23 2023

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...This Afternoon and Tonight

Scattered to occasionally numerous thunderstorms will be possible at
times this evening into tonight. There will be the potential for
some severe storms within this activity with the main hazards being
hail to 1.5 inches in diameter, damaging wind gusts, and locally
heavy rainfall that may lead to flooding concerns. An isolated
tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Temperatures are forecasted to reach the upper 80s to lower 90s by
Thursday afternoon as dewpoints climb into the lower to mid 70s. Heat
indices will likely reach the mid to upper 90s and may top 100 degree
by afternoon, especially south of the I-69 corridor. A Heat Advisory
may need to be expanded into part of the area if thunderstorms do not
disrupt the flow of hot and humid air into the area too much.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-240900-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
357 PM EDT Wed Aug 23 2023

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...This Afternoon and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Small craft advisories may be needed gain by Saturday as gusty
northerly winds in the wake of a strong cold front bring building
waves.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

DG

In the hours before

Local storm report, Aug 23, 4:24 PM EST, 5 hours 6 minutes before

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Local storm report, Aug 23, 6:36 PM EST, 2 hours 54 minutes before

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The radar

The Detroit radar (KDTX), 55 km away, was scanning. The volume nearest the first event began at 02:28 UTC.

Open the radar archive at this moment

Event by event

4 marine thunderstorm wind. Local standard time, as filed.

Marine Thunderstorm Wind, Lake St Clair (U.S. Portion)

When: August 23, 9:30 PM EST
Where: Lake St Clair (U.S. Portion) forecast zone, St Clair Shores
Measured: 46 kt (53 mph) measured gust
Reported by: C-MAN Station
Coordinates: 42.470, -82.880

Marine Thunderstorm Wind, Detroit River

When: August 23, 9:39 PM EST
Where: Detroit River forecast zone, 0.45 mi SSE of Belle Isle
Measured: 45 kt (52 mph) measured gust
Reported by: Mesonet
Coordinates: 42.334, -82.985

Marine Thunderstorm Wind, Detroit River

When: August 23, 9:54 PM EST
Where: Detroit River forecast zone, Detroit River Light
Measured: 61 kt (70 mph) measured gust
Reported by: Mesonet
Coordinates: 42.000, -83.140

Marine Thunderstorm Wind, Lake St Clair (U.S. Portion)

When: August 23, 10:39 PM EST
Where: Lake St Clair (U.S. Portion) forecast zone, 2.81 mi S of St Clair Shores
Measured: 51 kt (59 mph) measured gust
Reported by: C-MAN Station
Coordinates: 42.430, -82.870

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

Every storm in Lake St. Clair in 2023 Every state in 2023 This 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 2026-09-30. Each event’s entry at NCEI: 1132103, 1132104, 1132105, 1132102.