Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 39, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 24, 2021, 8:41 PM EDT for Jackson County, Michigan. It was in force for 34 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
- Jul 24, 2021, 8:41 PM EDT (00:41 UTC)
- Expired
- Jul 24, 2021, 9:15 PM EDT
- In force
- 34 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Jackson County, MI
The radar
The Detroit radar (KDTX), 97 km from the middle of the area, began a volume at 00:45 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 |
|---|---|---|---|
| Jul 24, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.7 hours before the alert went out and 304 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
- 1517 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
998
WUUS53 KGRR 250041
SVRGRR
MIC075-250115-
/O.NEW.KGRR.SV.W.0039.210725T0041Z-210725T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
841 PM EDT Sat Jul 24 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Southern Jackson County in south central Michigan...
* Until 915 PM EDT.
* At 841 PM EDT, severe thunderstorms were located along a line
extending from near Vandercook Lake to 5 miles northeast of
Litchfield, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Jackson... Brooklyn... Vandercook Lake...
Spring Arbor... Napoleon... Norvell...
Pulaski... Concord... Horton...
Hanover... Oak Point... Sunset Beach...
Michigan Center...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4207 8414 4207 8471 4216 8471 4223 8455
4223 8413 4208 8413
TIME...MOT...LOC 0041Z 274DEG 42KT 4221 8435 4207 8466
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
MEADE1 follow-up statement
351
WWUS53 KGRR 250110
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
910 PM EDT Sat Jul 24 2021
MIC075-250119-
/O.EXP.KGRR.SV.W.0039.000000T0000Z-210725T0115Z/
Jackson MI-
910 PM EDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JACKSON COUNTY WILL
EXPIRE AT 915 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Michigan.
LAT...LON 4207 8414 4207 8471 4216 8471 4223 8455
4223 8413 4208 8413
TIME...MOT...LOC 0109Z 274DEG 42KT 4219 8393 4205 8424
$$
DUKEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:07 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 38 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2021Every severe thunderstorm warning 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.