Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 10, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 20, 2021, 7:05 PM EDT for Van Buren County, Michigan. It was in force for 55 min. 3 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
- Jun 20, 2021, 7:05 PM EDT (23:05 UTC)
- Expired
- Jun 20, 2021, 8:00 PM EDT
- In force
- 55 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
County Van Buren County, MI
The radar
The Grand Rapids radar (KGRR), 89 km from the middle of the area, began a volume at 23:06 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 |
|---|---|---|---|
| Jun 20, 7:18 PM EDT | HAIL 1.75 | 1 N Dewey Lake, MI | RELAYED BY WSBT. ON WEST SIDE OF MAGICIAN LAKE. |
| Jun 20, 7:25 PM EDT | HAIL 1.75 | Keeler, MI | REPORT POSTED VIA TWITTER, WITH PICTURES. |
| Jun 20, 7:35 PM EDT | HAIL 1 | 3 W Lawrence, MI |
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 |
|---|---|---|---|
| Jun 20, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 11.1 hours before the alert went out and 229 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
- 46 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 737 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
096
WUUS53 KGRR 202305
SVRGRR
MIC159-210000-
/O.NEW.KGRR.SV.W.0010.210620T2305Z-210621T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Rapids MI
705 PM EDT Sun Jun 20 2021
The National Weather Service in Grand Rapids has issued a
* Severe Thunderstorm Warning for...
Van Buren County in southwestern Michigan...
* Until 800 PM EDT.
* At 704 PM EDT, a severe thunderstorm was located near Berrien
Springs, or 8 miles west of Dowagiac, moving northeast at 45 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
South Haven... Paw Paw... Hartford...
Mattawan... Lawton... Bangor...
Decatur... Van Buren SP... Lake Michigan
Beach...
Pine Grove... Covert... Keeler...
Lawrence... Gobles... Bloomingdale...
Breedsville... Glendale... Grand Junction...
Kendall... Lacota...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4207 8622 4224 8622 4224 8637 4231 8632
4241 8628 4242 8576 4207 8576
TIME...MOT...LOC 2304Z 206DEG 39KT 4199 8627
HAIL...1.75IN
WIND...60MPH
$$
DUKE1 follow-up statement
875
WWUS53 KGRR 202336
SVSGRR
Severe Weather Statement
National Weather Service Grand Rapids MI
736 PM EDT Sun Jun 20 2021
MIC159-210000-
/O.CON.KGRR.SV.W.0010.000000T0000Z-210621T0000Z/
Van Buren MI-
736 PM EDT Sun Jun 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR VAN BUREN COUNTY...
At 736 PM EDT, a severe thunderstorm was located near Hartford, or 10
miles west of Paw Paw, moving northeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
South Haven... Paw Paw... Hartford...
Mattawan... Lawton... Bangor...
Decatur... Van Buren SP... Lake Michigan Beach...
Pine Grove... Covert... Keeler...
Lawrence... Gobles... Bloomingdale...
Breedsville... Glendale... Grand Junction...
Kendall... Lacota...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4207 8622 4224 8622 4224 8637 4231 8632
4241 8628 4242 8576 4207 8576
TIME...MOT...LOC 2336Z 213DEG 32KT 4220 8610
HAIL...1.00IN
WIND...60MPH
$$
NJJThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 4:50 AM EDT | Small Craft Advisory | GRR | 45 hr | |
| Jun 20, 4:52 AM EDT | Beach Hazards Statement | GRR | Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren | 45 hr |
| Jun 20, 7:13 PM EDT | Special Marine Warning | GRR | 92 min | |
| Jun 20, 7:56 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Calhoun, Kalamazoo, Van Buren | 64 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.