Alert archive / Michigan / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 41, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 20, 2019, 10:58 AM EDT for Mecosta County, Newaygo County, Michigan. It was in force for 47 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
- Jul 20, 2019, 10:58 AM EDT (14:58 UTC)
- Expired
- Jul 20, 2019, 11:45 AM EDT
- In force
- 47 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Mecosta County, MI, Newaygo County, MI
The radar
The Grand Rapids radar (KGRR), 78 km from the middle of the area, began a volume at 15:02 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 12:00Z, 3.0 hours before the alert went out and 225 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
- 2357 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
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 Jul 20, 7:47 AM EDT, 3 hours 11 minutes earlier.
Area forecast discussion, Jul 20, 7:47 AM EDT, 3 hours 11 minutes before
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</html>Hazardous weather outlook, Jul 20, 5:42 AM EDT, 5 hours 16 minutes before
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Local storm report, Jul 20, 5:56 AM EDT, 5 hours 2 minutes before
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</html>Local storm report, Jul 20, 6:15 AM EDT, 4 hours 43 minutes before
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</html>Local storm report, Jul 20, 6:54 AM EDT, 4 hours 4 minutes before
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</html>Local storm report, Jul 20, 10:50 AM EDT, 8 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 |
|---|---|---|---|---|
| Jul 19, 11:30 PM EDT | Special Marine Warning | GRR | 2 hr | |
| Jul 19, 11:49 PM EDT | Severe Thunderstorm Warning | GRR | Mason | 56 min |
| Jul 20, 12:15 AM EDT | Severe Thunderstorm Warning | GRR | Oceana | 60 min |
| Jul 20, 12:23 AM EDT | Severe Thunderstorm Warning | GRR | Lake | 46 min |
| Jul 20, 12:28 AM EDT | Special Marine Warning | GRR | 92 min | |
| Jul 20, 12:39 AM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 66 min |
| Jul 20, 12:48 AM EDT | Severe Thunderstorm Warning | GRR | Muskegon | 57 min |
| Jul 20, 1:08 AM EDT | Special Weather Statement | GRR | Clare, Clinton, Gratiot, Ionia, Isabella, Kent and 4 more | 82 min |
| Jul 20, 1:24 AM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 51 min |
| Jul 20, 1:42 AM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry | 63 min |
| Jul 20, 1:45 AM EDT | Severe Thunderstorm Warning | GRR | Ionia | 60 min |
| Jul 20, 2:05 AM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Eaton, Kalamazoo, Van Buren | 85 min |
| Jul 20, 2:21 AM EDT | Special Marine Warning | GRR | 54 min | |
| Jul 20, 2:28 AM EDT | Special Weather Statement | GRR | Clinton, Ingham, Jackson | 92 min |
| Jul 20, 7:52 AM EDT | Severe Thunderstorm Warning | GRR | Lake, Osceola | 53 min |
| Jul 20, 8:58 AM EDT | Areal Flood Advisory | GRR | Lake, Mason | 2 hr |
| Jul 20, 10:54 AM EDT | Areal Flood Warning | GRR | Lake, Mason | 36 hr |
| Jul 20, 11:15 AM EDT | Areal Flood Advisory | GRR | Mecosta, Osceola | 23 hr |
| Jul 20, 12:58 PM EDT | Special Marine Warning | GRR | 92 min | |
| Jul 20, 1:37 PM EDT | Special Marine Warning | GRR | 113 min | |
| Jul 20, 1:45 PM EDT | Severe Thunderstorm Warning | GRR | Mason | 60 min |
| Jul 20, 2:07 PM EDT | Severe Thunderstorm Warning | GRR | Oceana | 53 min |
| Jul 20, 2:08 PM EDT | Areal Flood Advisory | GRR | Newaygo | 7 hr |
| Jul 20, 2:33 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon | 57 min |
| Jul 20, 2:34 PM EDT | Special Marine Warning | GRR | 56 min | |
| Jul 20, 2:46 PM EDT | Severe Thunderstorm Warning | GRR | Newaygo | 59 min |
| Jul 20, 3:11 PM EDT | Severe Thunderstorm Warning | GRR | Ottawa | 49 min |
| Jul 20, 3:11 PM EDT | Severe Thunderstorm Warning | GRR | Lake, Mecosta, Osceola | 64 min |
| Jul 20, 3:15 PM EDT | Special Marine Warning | GRR | 60 min | |
| Jul 20, 3:23 PM EDT | Special Marine Warning | GRR | 52 min | |
| Jul 20, 4:13 PM EDT | Special Marine Warning | GRR | 92 min | |
| Jul 20, 5:36 PM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Eaton, Ingham, Jackson and 2 more | 84 min |
| Jul 20, 5:54 PM EDT | Special Marine Warning | GRR | 111 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2019Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.