Alert archive / Michigan / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 11, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 11, 2008, 2:35 PM EDT for 5 counties in Michigan. It was in force for 40 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
- Apr 11, 2008, 2:35 PM EDT (18:35 UTC)
- Expired
- Apr 11, 2008, 3:15 PM EDT
- In force
- 40 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
Counties Gratiot County, MI, Ionia County, MI, Isabella County, MI, Mecosta County, MI, Montcalm County, MI
The radar
The Grand Rapids radar (KGRR), 69 km from the middle of the area, began a volume at 18:38 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 11, 12:58 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 6.6 hours before the alert went out and 146 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 462 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 448 m²/s²
- 0-3 km storm-relative helicity
- 382 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 Apr 11, 1:47 PM EDT, 48 minutes earlier.
Area forecast discussion, Apr 11, 1:47 PM EDT, 48 minutes before
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</html>Hazardous weather outlook, Apr 11, 5:32 AM EDT, 9 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 532 AM EDT FRI APR 11 2008 MIZ037>040-043>046-050>052-056>059-064>067-071>074-120945- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 532 AM EDT FRI APR 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY ACROSS ALL OF SOUTHWEST LOWER MICHIGAN. THE PRIMARY THREATS ARE DAMAGING WINDS...LARGE HAIL AND PERHAPS A FEW TORNADOES. IN ADDITION FREQUENT LIGHTNING AND BRIEFLY HEAVY RAINFALL WILL ACCOMPANY THE STRONGEST THUNDERSTORMS. THE MAIN STORM MOTION WILL BE NORTHEAST AT 40 MPH. THE TIME FRAME FOR THE SEVERE WEATHER IS FROM NOON TO 4 PM. DUE TO THE RECENT HEAVY RAINFALL...RUNOFF WILL LEAD TO RISING STREAM AND RIVER LEVELS. SOME MINOR FLOODING IS POSSIBLE. ADDITIONAL RAINFALL AMOUNTS OF UNDER A HALF INCH ARE EXPECTED TODAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY RISING WATER LEVELS ON STREAMS AND RIVERS COULD LEAD TO SOME MINOR FLOODING INTO THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY. LMZ844>849-120945- 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- 532 AM EDT FRI APR 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT DUE TO THE WINDS AND WAVES...CONDITIONS WILL BE HAZARDOUS FOR SMALL CRAFT THROUGH TONIGHT. IN ADDITION THE POTENTIAL EXISTS FOR SOME THUNDERSTORMS WITH HIGH WINDS AND FREQUENT LIGHTNING TODAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY WINDS WILL BECOME NORTHERLY AND IT WILL TURN COLDER THIS WEEKEND. THUS CONDITIONS WILL REMAIN HAZARDOUS FOR SMALL CRAFT.
In the hours before
Local storm report, Apr 11, 2:10 PM EDT, 25 minutes before
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</html>Special weather statement, Apr 11, 2:13 PM EDT, 22 minutes before
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</html>Local storm report, Apr 11, 2:33 PM EDT, 2 minutes before
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</html>Local storm report, Apr 11, 2:34 PM EDT, 1 minute before
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</html>Local storm report, Apr 11, 2:35 PM EDT, 0 minutes 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 |
|---|---|---|---|---|
| Apr 11, 12:29 PM EDT | Special Weather Statement | GRR | Allegan, Van Buren | 31 min |
| Apr 11, 12:44 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Van Buren | 46 min |
| Apr 11, 1:27 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Kent, Ottawa | 48 min |
| Apr 11, 2:13 PM EDT | Special Weather Statement | GRR | Kent | 62 min |
| Apr 11, 2:18 PM EDT | Special Weather Statement | GRR | Clinton, Eaton | 57 min |
| Apr 11, 2:22 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Mecosta, Montcalm | 38 min |
| Apr 11, 3:18 PM EDT | Special Weather Statement | GRR | Calhoun, Clinton, Eaton, Ingham, Jackson | 27 min |
| Apr 11, 4:01 PM EDT | Special Weather Statement | GRR | Barry, Gratiot, Ionia | 59 min |
| Apr 11, 4:40 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Montcalm | 50 min |
| Apr 11, 4:47 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Jackson | 31 min |
| Apr 11, 5:07 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Eaton, Ingham, Ionia | 38 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2008Every severe thunderstorm warning in 2008
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.