Alert archive / Michigan / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 42, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 11, 2021, 6:58 PM EDT for Alcona County, Alpena County, Presque Isle County, Michigan. It was in force for 47 min. 4 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, 6:58 PM EDT (22:58 UTC)
- Expired
- Aug 11, 2021, 7:45 PM EDT
- In force
- 47 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Alcona County, MI, Alpena County, MI, Presque Isle County, MI
The radar
The NCL Michigan radar (KAPX), 105 km from the middle of the area, began a volume at 22:56 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, 7:03 PM EDT | TSTM WND DMG | 1 Ese Lachine, MI | REPORTS OF TREES DOWN NEAR LACHINE. |
| Aug 11, 7:06 PM EDT | TSTM WND DMG | 1 N Spratt, MI | REPORTS OF TREES DOWN NEAR SPRATT. |
| Aug 11, 7:15 PM EDT | TSTM WND DMG | 5 Nw Devils Lake, MI | SOCIAL MEDIA REPORT W/ PICTURES OF MULTIPLE TREES DOWN ON INDIAN RESERVE RD SOUTH OF KAPN. |
| Aug 11, 7:25 PM EDT | TSTM WND GST 39 | 1 W Ossineke, MI |
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, 11.0 hours before the alert went out and 78 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.
476
WUUS53 KAPX 112258
SVRAPX
MIC001-007-141-112345-
/O.NEW.KAPX.SV.W.0042.210811T2258Z-210811T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
658 PM EDT Wed Aug 11 2021
The National Weather Service in Gaylord has issued a
* Severe Thunderstorm Warning for...
Northwestern Alcona County in northern Michigan...
Alpena County in northern Michigan...
Southeastern Presque Isle County in northern Michigan...
* Until 745 PM EDT.
* At 658 PM EDT, severe thunderstorms were located along a line
extending from near Posen to near Fletcher Pond to near Comins,
moving east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Lachine and Long Rapids around 705 PM EDT.
Presque Isle and Fletcher Pond around 710 PM EDT.
Alpena, Ossineke Township and Cathro around 715 PM EDT.
Other locations in the path of these severe thunderstorms include The
Town Of Hubbard Lake, Lakewood, Hubbard Lake and Ossineke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4500 8320 4499 8326 4502 8338 4498 8336
4495 8338 4494 8330 4488 8327 4481 8389
4502 8389 4519 8385 4533 8340 4528 8333
4523 8335 4521 8328 4510 8325 4508 8319
TIME...MOT...LOC 2258Z 249DEG 58KT 4520 8371 4500 8384 4481 8410
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG2 follow-up statements
519
WWUS53 KAPX 112325
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
725 PM EDT Wed Aug 11 2021
MIC001-141-112335-
/O.CAN.KAPX.SV.W.0042.000000T0000Z-210811T2345Z/
Alcona MI-Presque Isle MI-
725 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ALCONA AND
SOUTHEASTERN PRESQUE ISLE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Michigan.
LAT...LON 4500 8320 4499 8326 4502 8338 4498 8336
4495 8338 4494 8330 4488 8327 4486 8352
4507 8349 4517 8342 4523 8335 4521 8328
4516 8328 4510 8325 4508 8319
TIME...MOT...LOC 2325Z 249DEG 58KT 4534 8317 4514 8330 4496 8356
$$
MIC007-112345-
/O.CON.KAPX.SV.W.0042.000000T0000Z-210811T2345Z/
Alpena MI-
725 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR EASTERN ALPENA COUNTY...
At 725 PM EDT, severe thunderstorms were located along a line
extending from 14 miles east of Presque Isle to 6 miles southeast of
Lakewood to near The Town Of Hubbard Lake, moving east at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe thunderstorms will remain over mainly rural areas of
eastern Alpena County, including the following locations... Devils
Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4500 8320 4499 8326 4502 8338 4498 8336
4495 8338 4494 8330 4488 8327 4486 8352
4507 8349 4517 8342 4523 8335 4521 8328
4516 8328 4510 8325 4508 8319
TIME...MOT...LOC 2325Z 249DEG 58KT 4534 8317 4514 8330 4496 8356
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MG968
WWUS53 KAPX 112336
SVSAPX
Severe Weather Statement
National Weather Service Gaylord MI
736 PM EDT Wed Aug 11 2021
MIC007-112346-
/O.EXP.KAPX.SV.W.0042.000000T0000Z-210811T2345Z/
Alpena MI-
736 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ALPENA COUNTY WILL
EXPIRE AT 745 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Michigan.
LAT...LON 4500 8320 4499 8326 4502 8338 4498 8336
4495 8338 4494 8330 4488 8327 4486 8352
4507 8349 4517 8342 4523 8335 4521 8328
4516 8328 4510 8325 4508 8319
TIME...MOT...LOC 2336Z 270DEG 58KT 4538 8300 4518 8313 4501 8340
$$
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, 6:31 PM EDT | Severe Thunderstorm Warning | APX | Crawford, Montmorency, Oscoda, Otsego | 44 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.