Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 30, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 11, 2021, 3:47 PM EDT for Chippewa County, Mackinac County, Michigan. It was in force for 43 min. 8 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, 3:47 PM EDT (19:47 UTC)
- Expired
- Aug 11, 2021, 4:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Chippewa County, MI, Mackinac County, MI
The radar
The NCL Michigan radar (KAPX), 138 km from the middle of the area, began a volume at 19:49 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, 3:48 PM EDT | TSTM WND GST 44 | 1 Nnw Sault Ste. Marie, MI | BUOY STATION SWPM4 S.W. PIER, MI. |
| Aug 11, 3:49 PM EDT | TSTM WND GST 64 | 1 Sse Kinross, MI | AWOS STATION KCIU KINROSS - CHIPPEWA COUNTY INTERNATIONAL ARPT. |
| Aug 11, 3:50 PM EDT | TSTM WND DMG | 4 Ssw Donaldson, MI | *** 1 INJ *** DRONE PICTURES SHOW NUMEROUS TREES DOWN ABOUT 1/4 WEST OF M-129 ON M-80. |
| Aug 11, 3:50 PM EDT | TSTM WND GST 52 | 1 Sw Kincheloe, MI | MESONET STATION RYDM4 RUDYARD. |
| Aug 11, 3:55 PM EDT | TSTM WND DMG | Pickford, MI | SOCIAL MEDIA REPORTS W/ PICTURES SHOWING HOUSE SIDING AND HORSE SHELTER ROOF BLOWN OFF. |
| Aug 11, 4:00 PM EDT | TSTM WND DMG | 2 Ese Munuscong, MI | DELAYED REPORT. DRONE FOOTAGE SENT IN ON SOCIAL MEDIA. |
| Aug 11, 4:06 PM EDT | TSTM WND GST 60 | 3 Nnw Munuscong, MI | BUOY STATION WNEM4 WEST NEEBISH ISLAND, MI. |
| Aug 11, 4:14 PM EDT | TSTM WND GST 52 | 1 Sw Kincheloe, MI | MESONET STATION RYDM4 RUDYARD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Alpena, MI (KAPX), launched 12:00Z, 7.8 hours before the alert went out and 199 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.
235
WUUS53 KAPX 111947
SVRAPX
MIC033-097-112030-
/O.NEW.KAPX.SV.W.0030.210811T1947Z-210811T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
347 PM EDT Wed Aug 11 2021
The National Weather Service in Gaylord has issued a
* Severe Thunderstorm Warning for...
Central Chippewa County in eastern Michigan...
Eastern Mackinac County in eastern Michigan...
* Until 430 PM EDT.
* At 346 PM EDT, severe thunderstorms were located along a line
extending from Dafter to 6 miles south of Rudyard to near Moran,
moving southeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Kinross and Dafter around 350 PM EDT.
Donaldson and Barbeau around 355 PM EDT.
St. Ignace, Pickford, Evergreen Shores and Kelden around 400 PM
EDT.
Cedarville, Munuscong, Hessel and Straits State Park around 405 PM
EDT.
Other locations in the path of these severe thunderstorms include
Mackinac Island and Stalwart.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4653 8412 4641 8415 4622 8409 4597 8414
4588 8442 4594 8449 4591 8456 4593 8466
4591 8460 4585 8452 4580 8465 4582 8467
4579 8469 4601 8510 4618 8473 4647 8446
4651 8435 4649 8427 4653 8421
TIME...MOT...LOC 1946Z 300DEG 41KT 4637 8441 4614 8462 4601 8490
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$2 follow-up statements
206
WWUS53 KAPX 112001
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
401 PM EDT Wed Aug 11 2021
MIC033-097-112030-
/O.CON.KAPX.SV.W.0030.000000T0000Z-210811T2030Z/
Chippewa MI-Mackinac MI-
401 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL CHIPPEWA AND EASTERN MACKINAC COUNTIES...
At 400 PM EDT, severe thunderstorms were located along a line
extending from near Barbeau to near Hessel to near Evergreen Shores,
moving southeast at 45 mph. The Kinross Airport measured a 64 mph
wind gust with this storm.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Munuscong and Hessel around 405 PM EDT.
Other locations in the path of these severe thunderstorms include
Cedarville and Stalwart.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4653 8412 4641 8415 4622 8409 4597 8414
4588 8442 4594 8449 4591 8456 4593 8466
4591 8460 4585 8452 4580 8465 4582 8467
4579 8469 4601 8510 4618 8473 4647 8446
4651 8435 4649 8427 4653 8421
TIME...MOT...LOC 2000Z 300DEG 41KT 4630 8423 4607 8444 4594 8472
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$642
WWUS53 KAPX 112014
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
414 PM EDT Wed Aug 11 2021
MIC033-097-112030-
/O.CON.KAPX.SV.W.0030.000000T0000Z-210811T2030Z/
Chippewa MI-Mackinac MI-
414 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTH CENTRAL CHIPPEWA AND SOUTHEASTERN MACKINAC COUNTIES...
At 413 PM EDT, severe thunderstorms were located along a line
extending from 6 miles east of Munuscong to near Cedarville to near
Mackinac Island, moving southeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
south central Chippewa and southeastern Mackinac Counties, including
the following locations... Marquette Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4632 8412 4622 8409 4597 8414 4588 8442
4594 8449 4591 8456 4593 8466 4591 8460
4584 8454 4580 8465 4582 8467 4579 8469
4600 8477 4612 8425 4633 8423
TIME...MOT...LOC 2013Z 300DEG 41KT 4623 8406 4600 8427 4587 8455
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$The 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, 3:58 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, 6:31 PM EDT | Severe Thunderstorm Warning | APX | Crawford, Montmorency, Oscoda, Otsego | 44 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.