Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 103, NWS Northern Indiana
NWS Northern Indiana issued this severe thunderstorm warning at Aug 24, 2021, 8:30 PM EDT for Cass County, Michigan. It was in force for 30 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
- Aug 24, 2021, 8:30 PM EDT (00:30 UTC)
- Expired
- Aug 24, 2021, 9:00 PM EDT
- In force
- 30 min
- Issued by
- NWS Northern Indiana
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Cass County, MI
The radar
The Northern Indiana radar (KIWX), 76 km from the middle of the area, began a volume at 00:33 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
Detroit, MI (KDTX), launched 00:00Z, 0.5 hours before the alert went out and 221 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
- 3040 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
563
WUUS53 KIWX 250030
SVRIWX
MIC027-250100-
/O.NEW.KIWX.SV.W.0103.210825T0030Z-210825T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
830 PM EDT Tue Aug 24 2021
The National Weather Service in Northern Indiana has issued a
* Severe Thunderstorm Warning for...
Northern Cass County in southwestern Michigan...
* Until 900 PM EDT.
* At 830 PM EDT, a severe thunderstorm was located near Decatur, or
near Dowagiac, moving north at 10 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...
Dowagiac, Marcellus, Penn, Vandalia, Wakelee and La Grange.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4207 8578 4191 8591 4198 8614 4207 8611
TIME...MOT...LOC 0030Z 201DEG 9KT 4202 8599
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RTC1 follow-up statement
480
WWUS53 KIWX 250047
SVSIWX
Severe Weather Statement
National Weather Service Northern Indiana
847 PM EDT Tue Aug 24 2021
MIC027-250100-
/O.CON.KIWX.SV.W.0103.000000T0000Z-210825T0100Z/
Cass MI-
847 PM EDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHERN CASS COUNTY...
At 847 PM EDT, a severe thunderstorm was located near Decatur, or 7
miles northeast of Dowagiac, moving northeast at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Dowagiac, Marcellus and La Grange.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4194 8599 4194 8602 4198 8614 4207 8611
4207 8578 4202 8582
TIME...MOT...LOC 0047Z 213DEG 7KT 4204 8598
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RTCThe office that day
Everything else NWS Northern Indiana issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:14 PM EDT | Areal Flood Advisory | IWX | Berrien, Cass | 3 hr |
| Aug 24, 8:29 PM EDT | Severe Thunderstorm Warning | IWX | Berrien, Cass | 46 min |
| Aug 24, 9:02 PM EDT | Severe Thunderstorm Warning | IWX | Berrien, Cass, Saint Joseph | 43 min |
| Aug 24, 9:40 PM EDT | Special Weather Statement | IWX | Branch | 35 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.