Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Gaylord, MI

September 7, 2021Benzie County, Grand Traverse County, Leelanau County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 7, 2021, 8:40 AM EDT for Benzie County, Grand Traverse County, Leelanau County, Michigan. It was in force for 50 min. 2 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
Sep 7, 2021, 8:40 AM EDT (12:40 UTC)
Expired
Sep 7, 2021, 9:30 AM EDT
In force
50 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Benzie County, MI, Grand Traverse County, MI, Leelanau County, MI

The radar

The NCL Michigan radar (KAPX), 95 km from the middle of the area, began a volume at 12:43 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

TimeReportWhereRemark
Sep 7, 9:15 AM EDTHAIL 0.72 Sw Fouch, MI
Sep 7, 9:30 AM EDTTSTM WND DMG2 N Interlochen, MIPOWER LINES DOWN ON ROAD. TIME OF DAMAGE ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 0.7 hours before the alert went out and 177 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, Green Bay/Straub, WI at 12:00Z on 2021-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 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, Green Bay/Straub, WI at 12:00Z on 2021-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -120 square meters per square second.19395878Sfc1 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
14 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-120 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted.

805 
WUUS53 KAPX 071240
SVRAPX
MIC019-055-089-071330-
/O.NEW.KAPX.SV.W.0065.210907T1240Z-210907T1330Z/

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

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Leelanau County in northern Michigan...
  Northern Benzie County in northern Michigan...
  West central Grand Traverse County in northern Michigan...

* Until 930 AM EDT.

* At 839 AM EDT, severe thunderstorms were located along a line
  extending from 9 miles north of Sleeping Bear Point to 6 miles west
  of Empire to 9 miles northwest of Frankfort, moving east at 40 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.

* Severe thunderstorms will be near...
  Empire and Glen Haven around 850 AM EDT.
  Burdickville around 855 AM EDT.

Other locations in the path of these severe thunderstorms include
Leland, Platte Township, Maple City, Cedar, Lake Leelanau, Suttons
Bay, Peshawbestown, Omena, Lake Ann, Fouch, Greilickville, Traverse
City and Interlochen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4471 8628 4478 8613 4493 8611 4495 8600
      4500 8591 4498 8584 4508 8576 4506 8554
      4479 8561 4464 8573
TIME...MOT...LOC 1239Z 279DEG 34KT 4505 8604 4480 8619 4476 8632 

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

$$

Cornish
2 follow-up statements
280 
WWUS53 KAPX 071310
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
910 AM EDT Tue Sep 7 2021

MIC019-055-089-071330-
/O.CON.KAPX.SV.W.0065.000000T0000Z-210907T1330Z/
Leelanau MI-Benzie MI-Grand Traverse MI-
910 AM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM EDT
FOR SOUTHEASTERN LEELANAU...NORTHEASTERN BENZIE AND WEST CENTRAL
GRAND TRAVERSE COUNTIES...

At 910 AM EDT, severe thunderstorms were located along a line
extending from Suttons Bay to Cedar to near Honor, moving east at 40
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.

Locations impacted include...
  Suttons Bay, Fouch, Peshawbestown, Omena, Lake Leelanau, Bingham, 
  Greilickville, Interlochen and Traverse City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4476 8599 4489 8589 4493 8575 4507 8568
      4506 8554 4479 8561 4464 8573 4469 8613
TIME...MOT...LOC 1310Z 271DEG 35KT 4498 8563 4482 8581 4471 8598 

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

$$

Cornish
918 
WWUS53 KAPX 071320
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
920 AM EDT Tue Sep 7 2021

MIC019-055-089-071330-
/O.CON.KAPX.SV.W.0065.000000T0000Z-210907T1330Z/
Leelanau MI-Benzie MI-Grand Traverse MI-
920 AM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM EDT
FOR SOUTHEASTERN LEELANAU...NORTHEASTERN BENZIE AND WEST CENTRAL
GRAND TRAVERSE COUNTIES...

At 919 AM EDT, severe thunderstorms were located along a line
extending from Old Mission to Fouch to Lake Ann, moving east at 40
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated. At 915 AM EDT, dime size hail was reported 
         2 miles south of Lake Leelanau.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Traverse City, Bingham, Suttons Bay, Cedar, Lake Ann, Omena,
Interlochen, Greilickville, Peshawbestown and Fouch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4474 8594 4492 8574 4506 8561 4506 8554
      4479 8561 4464 8573 4468 8605
TIME...MOT...LOC 1319Z 270DEG 34KT 4497 8551 4481 8569 4470 8586 

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

$$

Cornish

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, 8:57 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, 1:09 PM EDTSevere Thunderstorm WarningAPXIosco16 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.