Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 48, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 11, 2021, 2:08 PM EDT for Jackson County, Michigan. It was in force for 58 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 11, 2021, 2:08 PM EDT (18:08 UTC)
- Expired
- Aug 11, 2021, 3:06 PM EDT
- In force
- 58 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Jackson County, MI
The radar
The Detroit radar (KDTX), 95 km from the middle of the area, began a volume at 18:11 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 2:20 PM EDT | TSTM WND DMG | 3 Sw Parma, MI | SEVERAL LARGE OAK TREES DOWN ON CONCORD ROAD BETWEEN ERIE ROAD AND KING ROAD. |
| Aug 11, 2:25 PM EDT | TSTM WND DMG | 1 E Parma, MI | LARGE HEALTHY TREE SNAPPED HALFWAY UP TRUNK. DAMAGE TO TWO CARS. |
| Aug 11, 2:26 PM EDT | TSTM WND DMG | 2 W Sandstone, MI | MANY LARGE LIMBS DOWN IN CEMETERY NEAR MICHIGAN AVE AND CHAPEL RD. |
| Aug 11, 2:31 PM EDT | TSTM WND DMG | 2 Se Sandstone, MI | PHOTO OF LARGE TREE FALLEN ACROSS POWER LINES AT ARBOR HILLS GOLF COURSE, RELAYED VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Aug 11, 2:43 PM EDT | TSTM WND GST 46 | 3 Ene Sandstone, MI | ASOS STATION KJXN JACKSON COUNTY-REYNOLDS FIELD AIRPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 11:50 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 6.1 hours before the alert went out and 99 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
- 106 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 1220 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
792 WUUS53 KGRR 111808 SVRGRR MIC075-111945- /O.NEW.KGRR.SV.W.0048.210811T1808Z-210811T1945Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Grand Rapids MI 208 PM EDT Wed Aug 11 2021 The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for... Jackson County in south central Michigan... * Until 345 PM EDT. * At 208 PM EDT, a severe thunderstorm was located near Homer, or 8 miles south of Albion, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Jackson and Vandercook Lake around 225 PM EDT. Other locations in the path of this severe thunderstorm include Brooklyn and Grass Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4242 8472 4242 8413 4207 8414 4207 8471 TIME...MOT...LOC 1808Z 253DEG 49KT 4213 8470 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ LAURENS
2 follow-up statements
758 WWUS53 KGRR 111843 SVSGRR Severe Weather Statement National Weather Service Grand Rapids MI 243 PM EDT Wed Aug 11 2021 MIC075-111945- /O.CON.KGRR.SV.W.0048.000000T0000Z-210811T1945Z/ Jackson MI- 243 PM EDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR EASTERN JACKSON COUNTY... At 243 PM EDT, severe thunderstorms were located along a line extending from near Stockbridge to near Brooklyn, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe thunderstorms will remain over mainly rural areas of eastern Jackson County, including the following locations... Oak Point, Sunset Beach, Michigan Center, Norvell, Munith, Leoni and Napoleon. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4242 8413 4207 8414 4207 8447 4242 8444 TIME...MOT...LOC 1843Z 251DEG 35KT 4240 8416 4208 8426 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MEADE
915
WWUS53 KGRR 111906
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
306 PM EDT Wed Aug 11 2021
MIC075-111916-
/O.CAN.KGRR.SV.W.0048.000000T0000Z-210811T1945Z/
Jackson MI-
306 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JACKSON COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
south central Michigan.
LAT...LON 4242 8413 4207 8414 4207 8447 4242 8444
TIME...MOT...LOC 1904Z 253DEG 49KT 4248 8379 4216 8389
$$
MEADEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:46 PM EDT | Special Marine Warning | GRR | 59 min | |
| Aug 10, 9:22 PM EDT | Special Weather Statement | GRR | Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 16 more | 3 hr |
| Aug 10, 9:40 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren | 73 min |
| Aug 10, 10:02 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Kalamazoo, Kent, Lake, Newaygo | 58 min |
| Aug 10, 10:41 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Eaton, Ionia, Mecosta, Montcalm, Osceola | 64 min |
| Aug 10, 11:09 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Clinton, Gratiot, Ingham, Isabella, Jackson | 66 min |
| Aug 11, 11:45 AM EDT | Special Marine Warning | GRR | 90 min | |
| Aug 11, 12:40 PM EDT | Special Weather Statement | GRR | Kent | 65 min |
| Aug 11, 12:51 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Ottawa | 28 min |
| Aug 11, 1:07 PM EDT | Special Weather Statement | GRR | Kent | 83 min |
| Aug 11, 1:28 PM EDT | Special Weather Statement | GRR | Calhoun, Kalamazoo | 62 min |
| Aug 11, 1:39 PM EDT | Special Weather Statement | GRR | Clinton, Eaton, Gratiot, Ingham, Ionia, Jackson and 1 more | 2 hr |
| Aug 11, 1:56 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 38 min |
| Aug 11, 2:11 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot, Ionia, Montcalm | 49 min |
| Aug 11, 2:38 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 34 min |
| Aug 11, 6:26 PM EDT | Special Marine Warning | GRR | 2 hr | |
| Aug 11, 7:32 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon | 43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.