Alert archive / Michigan / Special Weather Statements in 2021
Special Weather Statement, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this special weather statement at Apr 5, 2021, 6:27 AM EDT for 8 counties in Michigan. It was in force for 108 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2021, 6:27 AM EDT (10:27 UTC)
- Expired
- Apr 5, 2021, 8:15 AM EDT
- In force
- 108 min
- Issued by
- NWS Grand Rapids, MI
Counties Ionia County, MI, Kent County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ottawa County, MI
The radar
The Grand Rapids radar (KGRR), 59 km from the middle of the area, began a volume at 10:29 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 10.5 hours before the alert went out and 223 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
- 2596 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 418 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Apr 5, 3:30 AM EDT, 2 hours 57 minutes earlier.
Area forecast discussion, Apr 5, 3:30 AM EDT, 2 hours 57 minutes before
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<title>Service Notice</title>
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</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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</html>Hazardous weather outlook, Apr 5, 3:36 AM EDT, 2 hours 51 minutes before
Hazardous Weather Outlook National Weather Service Grand Rapids MI 336 AM EDT Mon Apr 5 2021 MIZ037>040-043>046-050>052-056>059-064>067-071>074-060745- Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon- Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton- Ingham-Van Buren-Kalamazoo-Calhoun-Jackson- 336 AM EDT Mon Apr 5 2021 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Scattered thunderstorms will bring a threat of lightning strikes Monday morning and afternoon. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected. LMZ844>849-060745- 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- 336 AM EDT Mon Apr 5 2021 This hazardous weather outlook is for portions of southwest Lower Michigan. .DAY ONE...Today and Tonight Scattered thunderstorms over Lake Michigan will bring a threat of lightning Monday morning and afternoon. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected.
In the hours before
Local storm report, Apr 5, 5:51 AM EDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
551 AM EDT MON APR 5 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0539 AM HAIL 4 SSE STONY LAKE 43.50N 86.47W
04/05/2021 M0.50 INCH OCEANA MI COCORAHS
&&Special weather statement, Apr 5, 6:27 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Grand Rapids MI
627 AM EDT Mon Apr 5 2021
MIZ043>045-050-051-056>058-051215-
Oceana-Montcalm-Muskegon-Ionia-Mecosta-Ottawa-Newaygo-Kent-
627 AM EDT Mon Apr 5 2021
...Thunderstorms with Small Hail and Frequent Lightning...
At 622 AM EDT, strong thunderstorms were clustered near Shelby, or 7
miles southeast of Hart, moving east at 30 mph.
Penny size hail is likely with this storm, and possible with any
other storms that develop over west central Lower Michigan through
daybreak.
Frequent cloud to ground lightning is occurring with these storms as
well. Lightning can strike 10 miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.
LAT...LON 4382 8643 4381 8509 4347 8508 4346 8484
4277 8484 4277 8621 4309 8625 4362 8654
TIME...MOT...LOC 1022Z 290DEG 25KT 4362 8626
MEADEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 8:39 AM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more | 111 min |
| Apr 5, 10:56 AM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 6 more | 2 hr |
Nearby
Special Weather Statements in Michigan, 2021Every special weather statement in 2021
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.