Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 41, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 11, 2021, 6:31 PM EDT for 4 counties in Michigan. It was in force for 44 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
- Aug 11, 2021, 6:31 PM EDT (22:31 UTC)
- Expired
- Aug 11, 2021, 7:15 PM EDT
- In force
- 44 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Crawford County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI
The radar
The NCL Michigan radar (KAPX), 40 km from the middle of the area, began a volume at 22:33 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 6:37 PM EDT | TSTM WND DMG | 4 S Lewiston, MI | LOTS OF TREE DAMAGE ACROSS NORTHWEST OSCODA COUNTY. |
| Aug 11, 6:44 PM EDT | TSTM WND DMG | 1 S Avery, MI | TREES OF 6-8 INCHES IN DIAMETER DOWN. |
| Aug 11, 6:51 PM EDT | TSTM WND DMG | 1 Nne Atlanta, MI | WIDESPREAD TREE DAMAGE ACROSS MONTMORENCY COUNTY PER LAW ENFORCEMENT. |
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, 4:48 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Alpena, MI (KAPX), launched 12:00Z, 10.5 hours before the alert went out and 145 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
- 2 J/kg
- Mixed-layer CIN
- -340 J/kg
- Mixed-layer LCL
- 1366 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
690
WUUS53 KAPX 112231
SVRAPX
MIC039-119-135-137-112315-
/O.NEW.KAPX.SV.W.0041.210811T2231Z-210811T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
631 PM EDT Wed Aug 11 2021
The National Weather Service in Gaylord has issued a
* Severe Thunderstorm Warning for...
Southeastern Otsego County in northern Michigan...
Northern Crawford County in northern Michigan...
Montmorency County in northern Michigan...
Northern Oscoda County in northern Michigan...
* Until 715 PM EDT.
* At 631 PM EDT, severe thunderstorms were located along a line
extending from Canada Creek Ranch to Lovells to near Grayling,
moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Canada Creek Ranch and Briley Township around 635 PM EDT.
Lewiston and Garland around 645 PM EDT.
Other locations in the path of these severe thunderstorms include
Hillman, Loud Township, Comins, Red Oak, Lockwood Lake and Mio.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4481 8389 4464 8427 4464 8485 4482 8452
4516 8422 4513 8388
TIME...MOT...LOC 2231Z 268DEG 32KT 4514 8417 4482 8445 4469 8472
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG4 follow-up statements
624
WWUS53 KAPX 112245
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
645 PM EDT Wed Aug 11 2021
MIC137-112255-
/O.CAN.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Otsego MI-
645 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OTSEGO COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Michigan.
LAT...LON 4481 8389 4464 8427 4469 8461 4485 8447
4486 8437 4516 8422 4513 8388
TIME...MOT...LOC 2245Z 268DEG 32KT 4514 8403 4482 8431 4469 8458
$$
MIC039-119-135-112315-
/O.CON.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Crawford MI-Montmorency MI-Oscoda MI-
645 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN CRAWFORD...MONTMORENCY AND NORTHERN OSCODA
COUNTIES...
At 645 PM EDT, severe thunderstorms were located along a line
extending from 6 miles west of Royston to Garland to 6 miles east of
Grayling, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hillman, Lovells, Loud Township, Comins, Red Oak, Lockwood Lake
and Mio.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4481 8389 4464 8427 4469 8461 4485 8447
4486 8437 4516 8422 4513 8388
TIME...MOT...LOC 2245Z 268DEG 32KT 4514 8403 4482 8431 4469 8458
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG251
WWUS53 KAPX 112250
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
650 PM EDT Wed Aug 11 2021
MIC039-112259-
/O.CAN.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Crawford MI-
650 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CRAWFORD COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Michigan.
LAT...LON 4464 8427 4464 8429 4465 8437 4486 8437
4515 8406 4513 8388 4481 8389
TIME...MOT...LOC 2249Z 268DEG 42KT 4514 8391 4482 8419 4469 8446
$$
MIC119-135-112315-
/O.CON.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Montmorency MI-Oscoda MI-
650 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN MONTMORENCY AND NORTHERN OSCODA COUNTIES...
At 649 PM EDT, severe thunderstorms were located along a line
extending from Royston to near Garland to 8 miles south of Lovells,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Atlanta, Lewiston, Mio, Comins, Hillman, Fletcher Pond, Red Oak,
Lockwood Lake, Loud Township and Garland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4464 8427 4464 8429 4465 8437 4486 8437
4515 8406 4513 8388 4481 8389
TIME...MOT...LOC 2249Z 268DEG 42KT 4514 8391 4482 8419 4469 8446
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG896
WWUS53 KAPX 112301
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
701 PM EDT Wed Aug 11 2021
MIC119-135-112315-
/O.CON.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Montmorency MI-Oscoda MI-
701 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN MONTMORENCY AND NORTHEASTERN OSCODA COUNTIES...
At 701 PM EDT, severe thunderstorms were located along a line
extending from near Cathro to near Lockwood Lake to near Red Oak,
moving east at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Hillman, Fletcher Pond and Lockwood Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4482 8403 4486 8410 4513 8394 4513 8388
4481 8389
TIME...MOT...LOC 2301Z 264DEG 46KT 4517 8365 4485 8393 4472 8420
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG213
WWUS53 KAPX 112310
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
710 PM EDT Wed Aug 11 2021
MIC119-135-112320-
/O.EXP.KAPX.SV.W.0041.000000T0000Z-210811T2315Z/
Montmorency MI-Oscoda MI-
710 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTMORENCY AND
NORTHEASTERN OSCODA COUNTIES WILL EXPIRE AT 715 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Michigan.
LAT...LON 4482 8403 4486 8410 4513 8394 4513 8388
4481 8389
TIME...MOT...LOC 2310Z 268DEG 32KT 4517 8368 4485 8396 4472 8423
$$
MGThe office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 9:00 PM EDT | Special Marine Warning | APX | 2 hr | |
| Aug 10, 9:44 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Charlevoix | 46 min |
| Aug 10, 10:04 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Grand Traverse, Leelanau, Manistee, Wexford | 41 min |
| Aug 10, 10:30 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Kalkaska | 30 min |
| Aug 10, 10:45 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Grand Traverse, Kalkaska, Leelanau, Missaukee, Wexford | 45 min |
| Aug 10, 10:52 PM EDT | Flash Flood Warning | APX | Antrim, Grand Traverse | 3 hr |
| Aug 10, 10:58 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Crawford, Kalkaska, Otsego | 32 min |
| Aug 10, 11:24 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Crawford, Kalkaska, Otsego | 51 min |
| Aug 10, 11:28 PM EDT | Severe Thunderstorm Warning | APX | Crawford, Kalkaska, Missaukee, Roscommon | 32 min |
| Aug 11, 12:13 AM EDT | Flash Flood Warning | APX | Leelanau | 3 hr |
| Aug 11, 12:28 AM EDT | Severe Thunderstorm Warning | APX | Alcona, Arenac, Iosco, Ogemaw, Oscoda | 47 min |
| Aug 11, 12:31 AM EDT | Severe Thunderstorm Warning | APX | Alcona, Alpena, Montmorency, Oscoda, Presque Isle | 44 min |
| Aug 11, 12:37 AM EDT | Special Marine Warning | APX | 83 min | |
| Aug 11, 1:46 AM EDT | Areal Flood Warning | APX | Antrim, Grand Traverse | 3 hr |
| Aug 11, 4:12 AM EDT | Small Craft Advisory | APX | 16 hr | |
| Aug 11, 2:52 PM EDT | Special Marine Warning | APX | 53 min | |
| Aug 11, 2:59 PM EDT | Special Weather Statement | APX | Mackinac | 31 min |
| Aug 11, 3:11 PM EDT | Special Marine Warning | APX | 64 min | |
| Aug 11, 3:18 PM EDT | Special Weather Statement | APX | Chippewa | 42 min |
| Aug 11, 3:38 PM EDT | Special Marine Warning | APX | 52 min | |
| Aug 11, 3:47 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Mackinac | 43 min |
| Aug 11, 3:58 PM EDT | Special Marine Warning | APX | 92 min | |
| Aug 11, 4:11 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Mackinac | 49 min |
| Aug 11, 4:24 PM EDT | Special Marine Warning | APX | 2 hr | |
| Aug 11, 4:54 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan | 51 min |
| Aug 11, 5:00 PM EDT | Severe Thunderstorm Warning | APX | Emmet | 18 min |
| Aug 11, 5:24 PM EDT | Severe Thunderstorm Warning | APX | Charlevoix, Cheboygan, Emmet | 36 min |
| Aug 11, 5:28 PM EDT | Special Marine Warning | APX | 2 hr | |
| Aug 11, 5:30 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Benzie, Grand Traverse, Kalkaska, Leelanau | 45 min |
| Aug 11, 5:43 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Emmet, Presque Isle | 47 min |
| Aug 11, 5:52 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Presque Isle | 38 min |
| Aug 11, 6:00 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Leelanau | 30 min |
| Aug 11, 6:09 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Crawford, Kalkaska, Otsego | 35 min |
| Aug 11, 6:24 PM EDT | Severe Thunderstorm Warning | APX | Antrim, Benzie, Grand Traverse, Kalkaska, Leelanau | 51 min |
| Aug 11, 6:26 PM EDT | Special Marine Warning | APX | 34 min | |
| Aug 11, 6:58 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Alpena, Presque Isle | 47 min |
| Aug 11, 7:26 PM EDT | Special Marine Warning | APX | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.