Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 117, NWS Northern Indiana
NWS Northern Indiana issued this severe thunderstorm warning at Oct 12, 2021, 12:00 AM EDT for Saint Joseph 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
- Oct 12, 2021, 12:00 AM EDT (04:00 UTC)
- Expired
- Oct 12, 2021, 12:30 AM EDT
- In force
- 30 min
- Issued by
- NWS Northern Indiana
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Saint Joseph County, MI
The radar
The Northern Indiana radar (KIWX), 73 km from the middle of the area, began a volume at 04:00 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, 4.0 hours before the alert went out and 182 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
- 332 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1123 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 276 m²/s²
- 0-3 km storm-relative helicity
- 379 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted.
321
WUUS53 KIWX 120400
SVRIWX
MIC149-120430-
/O.NEW.KIWX.SV.W.0117.211012T0400Z-211012T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
1200 AM EDT Tue Oct 12 2021
The National Weather Service in Northern Indiana has issued a
* Severe Thunderstorm Warning for...
Eastern St. Joseph County in southwestern Michigan...
* Until 1230 AM EDT.
* At 1159 PM EDT, a severe thunderstorm was located over Centreville,
or near Three Rivers, moving north at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Sturgis, Centreville, Colon, Nottawa, Leonidas, Mendon, Wasepi and
Fairfax.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4204 8529 4182 8543 4185 8559 4207 8553
4207 8530
TIME...MOT...LOC 0359Z 200DEG 39KT 4189 8552
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RTC1 follow-up statement
862
WWUS53 KIWX 120417
SVSIWX
Severe Weather Statement
National Weather Service Northern Indiana
1217 AM EDT Tue Oct 12 2021
MIC149-120430-
/O.CON.KIWX.SV.W.0117.000000T0000Z-211012T0430Z/
St. Joseph MI-
1217 AM EDT Tue Oct 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT
FOR NORTHEASTERN ST. JOSEPH COUNTY...
At 1217 AM EDT, a severe thunderstorm was located 7 miles southeast
of Vicksburg, or 11 miles northeast of Three Rivers, moving north at
45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Leonidas and Mendon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4196 8539 4198 8555 4207 8553 4207 8530
4206 8530
TIME...MOT...LOC 0417Z 199DEG 37KT 4204 8544
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RTCThe office that day
Everything else NWS Northern Indiana issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 11:23 PM EDT | Special Weather Statement | IWX | Saint Joseph | 37 min |
| Oct 12, 12:59 AM EDT | Special Weather Statement | IWX | Branch | 46 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.