Alert archive / Michigan / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 72, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 11, 2010, 11:48 AM EDT for Ingham County, Michigan. It was in force for 42 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
- Aug 11, 2010, 11:48 AM EDT (15:48 UTC)
- Expired
- Aug 11, 2010, 12:30 PM EDT
- In force
- 42 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 60.0 mph
County Ingham County, MI
The radar
The Detroit radar (KDTX), 75 km from the middle of the area, began a volume at 15:51 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.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 3.8 hours before the alert went out and 355 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2143 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 7:50 AM EDT, 3 hours 58 minutes earlier.
Area forecast discussion, Aug 11, 7:50 AM EDT, 3 hours 58 minutes before
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</html>Hazardous weather outlook, Aug 11, 11:33 AM EDT, 15 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1133 AM EDT WED AUG 11 2010 MIZ037>040-043>046-050>052-056>059-064>067-071>074-121000- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 1133 AM EDT WED AUG 11 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TODAY INTO TONIGHT. ANY SEVERE WEATHER IS FORECASTED TO REMAIN ISOLATED WITH DAMAGING WINDS THE PRIMARY THREAT. THE MAIN STORM MOTION WILL BE EAST AT 25 TO 30 MPH. LOCALIZED HEAVY DOWNPOURS ARE POSSIBLE. IN EXCESS OF AN INCH IS POSSIBLE WITH ANY STRONGER STORM. THIS COULD LEAD TO MINOR URBAN AND POOR DRAINAGE FLOODING. HEAT INDEX VALUES ARE EXPECTED TO TOP 90 DEGREES THIS AFTERNOON INTO THE EARLY EVENING HOURS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY WIDELY SCATTERED THUNDERSTORMS COULD FORM ON THURSDAY. SEVERE WEATHER IS NOT FORECASTED. SEVERE THUNDERSTORMS ALONG WITH LOCALLY HEAVY RAIN ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY. HEAT INDEX VALUES COULD REACH THE MID TO UPPER 90S DURING THE AFTERNOON AND EVENING HOURS OF THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER FRIDAY NIGHT INTO SATURDAY. LMZ844>849-121000- ST JOSEPH TO SOUTH HAVEN MI-SOUTH HAVEN TO HOLLAND MI- HOLLAND TO GRAND HAVEN MI-GRAND HAVEN TO WHITEHALL MI- WHITEHALL TO PENTWATER MI-PENTWATER TO MANISTEE MI- 1133 AM EDT WED AUG 11 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS MAY POSE A RISK TO MARINERS TODAY INTO TONIGHT. CLOUD TO WATER LIGHTNING STRIKES AND GUSTY WINDS WILL BE THE PRIMARY RISKS. THE MAIN STORM MOTION WILL BE EAST AT 25 TO 30 MPH. LOCALLY DENSE FOG IS POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A FEW THUNDERSTORMS ARE POSSIBLE THURSDAY. A HIGHER RISK FOR THUNDERSTORMS EXISTS FRIDAY NIGHT INTO SATURDAY. WINDS AND WAVES MAY BE LOCALLY HIGHER NEAR ANY THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER FRIDAY NIGHT INTO SATURDAY. MJS JK
In the hours before
Local storm report, Aug 11, 10:52 AM EDT, 56 minutes before
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</html>Local storm report, Aug 11, 11:12 AM EDT, 36 minutes before
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</html>Special weather statement, Aug 11, 11:18 AM EDT, 30 minutes before
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</html>Local storm report, Aug 11, 11:32 AM EDT, 16 minutes before
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</html>Local storm report, Aug 11, 11:43 AM EDT, 5 minutes before
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</html>Local storm report, Aug 11, 11:47 AM EDT, 1 minute before
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</html>The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:31 AM EDT | Special Weather Statement | GRR | Mason, Muskegon, Oceana, Ottawa | 119 min |
| Aug 11, 7:59 AM EDT | Special Marine Warning | GRR | 104 min | |
| Aug 11, 8:39 AM EDT | Severe Thunderstorm Warning | GRR | Allegan, Ottawa | 51 min |
| Aug 11, 9:28 AM EDT | Severe Thunderstorm Warning | GRR | Allegan | 62 min |
| Aug 11, 9:30 AM EDT | Special Weather Statement | GRR | Kent, Montcalm, Newaygo | 60 min |
| Aug 11, 9:33 AM EDT | Special Weather Statement | GRR | Allegan, Barry, Kalamazoo | 57 min |
| Aug 11, 9:46 AM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kalamazoo, Van Buren | 44 min |
| Aug 11, 10:29 AM EDT | Special Weather Statement | GRR | Barry, Calhoun, Eaton, Ionia, Kalamazoo | 61 min |
| Aug 11, 11:18 AM EDT | Special Weather Statement | GRR | Clinton, Eaton, Ingham | 57 min |
| Aug 11, 5:26 PM EDT | Special Weather Statement | GRR | Montcalm | 64 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2010Every severe thunderstorm warning in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.