Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 11, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Jun 12, 2021, 8:12 PM EDT for Alcona County, Michigan. It was in force for 18 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
- Jun 12, 2021, 8:12 PM EDT (00:12 UTC)
- Expired
- Jun 12, 2021, 8:30 PM EDT
- In force
- 18 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Alcona County, MI
The radar
The NCL Michigan radar (KAPX), 116 km from the middle of the area, began a volume at 00:13 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
Alpena, MI (KAPX), launched 00:00Z, 0.2 hours before the alert went out and 77 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
- 850 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
810
WUUS53 KAPX 130012
SVRAPX
MIC001-130030-
/O.NEW.KAPX.SV.W.0011.210613T0012Z-210613T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
812 PM EDT Sat Jun 12 2021
The National Weather Service in Gaylord has issued a
* Severe Thunderstorm Warning for...
Northeastern Alcona County in northern Michigan...
* Until 830 PM EDT.
* At 812 PM EDT, a severe thunderstorm was located over Black River,
or 8 miles north of Harrisville, moving east at 30 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will impact Black River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4469 8323 4472 8338 4484 8339 4486 8325
4485 8324 4475 8325 4471 8322 4470 8322
TIME...MOT...LOC 0012Z 269DEG 25KT 4478 8332
HAIL...1.25IN
WIND...60MPH
$$
JZ2 follow-up statements
613
WWUS53 KAPX 130019 RRA
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
819 PM EDT Sat Jun 12 2021
MIC001-130030-
/O.CON.KAPX.SV.W.0011.000000T0000Z-210613T0030Z/
Alcona MI-
819 PM EDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHEASTERN ALCONA COUNTY...
At 819 PM EDT, a severe thunderstorm was located near Black River, or
8 miles north of Harrisville, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Black River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4469 8323 4472 8338 4484 8339 4486 8325
4485 8324 4475 8325 4471 8322 4470 8322
TIME...MOT...LOC 0019Z 269DEG 25KT 4478 8325
HAIL...1.00IN
WIND...60MPH
$$
JZ372
WWUS53 KAPX 130024
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
824 PM EDT Sat Jun 12 2021
MIC001-130034-
/O.EXP.KAPX.SV.W.0011.000000T0000Z-210613T0030Z/
Alcona MI-
824 PM EDT Sat Jun 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ALCONA COUNTY
WILL EXPIRE AT 830 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4469 8323 4472 8338 4484 8339 4486 8325
4485 8324 4475 8325 4471 8322 4470 8322
TIME...MOT...LOC 0024Z 269DEG 25KT 4478 8321
$$
JZThe office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 8:00 PM EDT | Special Marine Warning | APX | 60 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.