Alert archive / Michigan / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 79, NWS Detroit, MI

September 21, 2019Genesee County, Lapeer County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Sep 21, 2019, 6:08 PM EDT for Genesee County, Lapeer County, Michigan. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 21, 2019, 6:08 PM EDT (22:08 UTC)
Expired: Sep 21, 2019, 6:40 PM EDT
In force: 32 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Genesee County, MI, Lapeer County, MI

The radar

The Detroit radar (KDTX), 40 km from the middle of the area, began a volume at 22:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Sep 21, 3:42 PM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Sep 21, 3:42 PM EDT, 2 hours 26 minutes before

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Hazardous weather outlook, Sep 21, 3:59 PM EDT, 2 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
359 PM EDT Sat Sep 21 2019

MIZ047>049-053>055-060>063-068>070-075-076-082-083-222000-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
359 PM EDT Sat Sep 21 2019

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...This Afternoon and Tonight

There remains a chance of thunderstorms this afternoon. These storms
are not expected to be severe but may produce wind gusts to 40 mph
and heavy rainfall while tracking northeast around 20 mph. A heavy
rainfall threat continues through tonight with any additional
thunderstorms.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Thunderstorms are likely Sunday and Sunday night with heavy rainfall
and localized flooding as the primary threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-222000-
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-
359 PM EDT Sat Sep 21 2019

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

.DAY ONE...This Afternoon and Tonight

There remains a chance of thunderstorms this afternoon. These storms
are not expected to be severe but may produce wind gusts to 30 knots
and heavy rainfall while tracking northeast around 20 knots. A heavy
rainfall threat continues through tonight with any additional
thunderstorms.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Small Craft Advisory in effect across Saginaw Bay and Port Austin to
Harbor Beach on Sunday. See marine forecast for more details.

Thunderstorms are likely Sunday and Sunday night with heavy rainfall
as the primary threats.

.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.

AA

In the hours before

Special weather statement, Sep 21, 12:40 PM EDT, 5 hours 28 minutes before

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Special weather statement, Sep 21, 4:34 PM EDT, 1 hour 34 minutes before

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Local storm report, Sep 21, 5:10 PM EDT, 58 minutes before

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Special weather statement, Sep 21, 5:12 PM EDT, 56 minutes before

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Special weather statement, Sep 21, 5:25 PM EDT, 43 minutes before

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Special weather statement, Sep 21, 5:54 PM EDT, 14 minutes before

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The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 12:40 PM EDT	Special Weather Statement	DTX	Oakland	50 min
Sep 21, 3:31 PM EDT	Small Craft Advisory	DTX		29 hr
Sep 21, 4:34 PM EDT	Special Weather Statement	DTX	Huron	56 min
Sep 21, 5:12 PM EDT	Special Weather Statement	DTX	Washtenaw	63 min
Sep 21, 5:25 PM EDT	Special Weather Statement	DTX	Genesee	65 min
Sep 21, 5:54 PM EDT	Special Weather Statement	DTX	Genesee, Lapeer	66 min
Sep 21, 6:09 PM EDT	Special Weather Statement	DTX	Oakland	51 min
Sep 21, 6:44 PM EDT	Special Weather Statement	DTX	Macomb, Saint Clair	61 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2019 Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.