Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 78, NWS Gaylord, MI

September 7, 2021Iosco County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 7, 2021, 1:09 PM EDT for Iosco County, Michigan. It was in force for 16 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
Sep 7, 2021, 1:09 PM EDT (17:09 UTC)
Expired
Sep 7, 2021, 1:25 PM EDT
In force
16 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Iosco County, MI

The radar

The NCL Michigan radar (KAPX), 120 km from the middle of the area, began a volume at 17:09 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
Sep 7, 12:21 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 5.2 hours before the alert went out and 112 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 2021-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2021-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

859 
WUUS53 KAPX 071709
SVRAPX
MIC069-071745-
/O.NEW.KAPX.SV.W.0078.210907T1709Z-210907T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
109 PM EDT Tue Sep 7 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Eastern Iosco County in northern Michigan...

* Until 145 PM EDT.

* At 109 PM EDT, a severe thunderstorm was located over East Tawas,
  moving east at 35 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.

* This severe thunderstorm will be near...
  Wurtsmith Airfield around 125 PM EDT.

Other locations in the path of this severe thunderstorm include
Oscoda and Au Sable.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4432 8329 4429 8335 4422 8343 4421 8347
      4422 8349 4424 8358 4436 8360 4443 8351
      4452 8335 4451 8332 4454 8331 4456 8327
TIME...MOT...LOC 1709Z 251DEG 30KT 4431 8353 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

GILLEN
1 follow-up statement
831 
WWUS53 KAPX 071725
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
125 PM EDT Tue Sep 7 2021

MIC069-071735-
/O.CAN.KAPX.SV.W.0078.000000T0000Z-210907T1745Z/
Iosco MI-
125 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN IOSCO COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
northern Michigan.

LAT...LON 4432 8329 4429 8335 4422 8343 4421 8347
      4422 8349 4424 8358 4436 8360 4443 8351
      4452 8335 4451 8332 4454 8331 4456 8327
TIME...MOT...LOC 1723Z 251DEG 30KT 4435 8335 

$$

GILLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 4:14 AM EDTBeach Hazards StatementAPXAlpena, Benzie, Charlevoix, Emmet, Leelanau, Mackinac and 1 more12 hr
Sep 7, 7:26 AM EDTSpecial Marine WarningAPX2 hr
Sep 7, 7:55 AM EDTSpecial Marine WarningAPX95 min
Sep 7, 8:26 AM EDTSpecial Marine WarningAPX64 min
Sep 7, 8:40 AM EDTSevere Thunderstorm WarningAPXBenzie, Grand Traverse, Leelanau50 min
Sep 7, 8:57 AM EDTSevere Thunderstorm WarningAPXBenzie, Grand Traverse, Manistee33 min
Sep 7, 9:25 AM EDTSevere Thunderstorm WarningAPXAntrim, Grand Traverse, Kalkaska50 min
Sep 7, 9:27 AM EDTSpecial Marine WarningAPX33 min
Sep 7, 9:29 AM EDTSevere Thunderstorm WarningAPXBenzie, Grand Traverse, Kalkaska, Manistee, Missaukee, Wexford46 min
Sep 7, 10:26 AM EDTSevere Thunderstorm WarningAPXMissaukee, Wexford34 min
Sep 7, 10:49 AM EDTSpecial Marine WarningAPX56 min
Sep 7, 11:06 AM EDTSevere Thunderstorm WarningAPXCrawford, Missaukee, Ogemaw, Oscoda, Roscommon24 min
Sep 7, 11:24 AM EDTSevere Thunderstorm WarningAPXBenzie, Manistee51 min
Sep 7, 11:28 AM EDTSevere Thunderstorm WarningAPXCrawford, Kalkaska47 min
Sep 7, 11:30 AM EDTSevere Thunderstorm WarningAPXAlcona, Crawford, Iosco, Ogemaw, Oscoda, Roscommon45 min
Sep 7, 11:56 AM EDTSevere Thunderstorm Warning Considerable damage threatAPXManistee, Missaukee, Wexford34 min
Sep 7, 12:00 PM EDTSevere Thunderstorm WarningAPXManistee30 min
Sep 7, 12:08 PM EDTSevere Thunderstorm WarningAPXAlcona, Iosco, Ogemaw14 min
Sep 7, 12:28 PM EDTSevere Thunderstorm WarningAPXMissaukee, Roscommon, Wexford47 min
Sep 7, 1:10 PM EDTSpecial Marine WarningAPX2 hr
Sep 7, 1:29 PM EDTSevere Thunderstorm WarningAPXWexford19 min
Sep 7, 1:31 PM EDTSpecial Marine WarningAPX67 min
Sep 7, 1:31 PM EDTSevere Thunderstorm WarningAPXMissaukee, Roscommon29 min
Sep 7, 1:37 PM EDTSevere Thunderstorm WarningAPXAlcona, Alpena, Iosco38 min
Sep 7, 1:47 PM EDTSevere Thunderstorm WarningAPXIosco, Ogemaw58 min
Sep 7, 2:22 PM EDTSevere Thunderstorm WarningAPXArenac, Gladwin, Iosco, Ogemaw53 min
Sep 7, 3:12 PM EDTSpecial Marine WarningAPX70 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.