Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 59, NWS Gaylord, MI

August 29, 20215 counties in Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 29, 2021, 2:17 PM EDT for 5 counties in Michigan. It was in force for 43 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
Aug 29, 2021, 2:17 PM EDT (18:17 UTC)
Expired
Aug 29, 2021, 3:00 PM EDT
In force
43 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Antrim County, MI, Charlevoix County, MI, Cheboygan County, MI, Emmet County, MI, Otsego County, MI

The radar

The NCL Michigan radar (KAPX), 40 km from the middle of the area, began a volume at 18:17 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 29, 1:46 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 6.3 hours before the alert went out and 189 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.

Skew-T log-pSkew-T log-p diagram, Alpena, MI at 12:00Z on 2021-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 221 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 12:00Z on 2021-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
221 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1035 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

080 
WUUS53 KAPX 291817
SVRAPX
MIC009-029-031-047-137-291900-
/O.NEW.KAPX.SV.W.0059.210829T1817Z-210829T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
217 PM EDT Sun Aug 29 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cheboygan County in northern Michigan...
  Northwestern Otsego County in northern Michigan...
  Northeastern Antrim County in northern Michigan...
  Southeastern Emmet County in northern Michigan...
  Southeastern Charlevoix County in northern Michigan...

* Until 300 PM EDT.

* At 217 PM EDT, severe thunderstorms were located along a line
  extending from near Clarion to Young State Park to near East
  Jordan, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Walloon Lake and Oden around 225 PM EDT.
  Alanson and Clarion around 230 PM EDT.

Other locations in the path of these severe thunderstorms include
Vanderbilt and Wolverine.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4528 8448 4514 8460 4507 8519 4516 8511
      4544 8484 4544 8476 4530 8486
TIME...MOT...LOC 1817Z 247DEG 37KT 4532 8492 4521 8503 4510 8513 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 4:14 AM EDTSpecial Weather StatementAPXEmmet46 min
Aug 29, 5:53 AM EDTSpecial Weather StatementAPXOgemaw22 min
Aug 29, 1:28 PM EDTSpecial Marine WarningAPX47 min
Aug 29, 1:30 PM EDTSpecial Marine WarningAPX45 min
Aug 29, 1:37 PM EDTSevere Thunderstorm WarningAPXAntrim, Charlevoix, Emmet, Grand Traverse, Leelanau38 min
Aug 29, 1:39 PM EDTSevere Thunderstorm WarningAPXChippewa, Mackinac51 min
Aug 29, 1:58 PM EDTSevere Thunderstorm WarningAPXCheboygan, Emmet47 min
Aug 29, 2:12 PM EDTSevere Thunderstorm WarningAPXKalkaska, Missaukee, Wexford48 min
Aug 29, 2:28 PM EDTSevere Thunderstorm WarningAPXAntrim, Charlevoix, Kalkaska, Otsego32 min
Aug 29, 2:29 PM EDTSpecial Marine WarningAPX91 min
Aug 29, 2:55 PM EDTSevere Thunderstorm WarningAPXCheboygan, Montmorency, Otsego, Presque Isle35 min
Aug 29, 3:01 PM EDTSevere Thunderstorm WarningAPXCrawford, Missaukee, Oscoda, Roscommon38 min
Aug 29, 3:22 PM EDTSevere Thunderstorm WarningAPXAlpena, Montmorency, Presque Isle53 min
Aug 29, 3:31 PM EDTSpecial Marine WarningAPX89 min
Aug 29, 3:36 PM EDTSevere Thunderstorm WarningAPXOgemaw, Oscoda, Roscommon24 min
Aug 29, 5:00 PM EDTSpecial Marine WarningAPX68 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.