Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Detroit, MI

September 7, 2021Lenawee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Sep 7, 2021, 7:55 PM EDT for Lenawee County, Michigan. It was in force for 33 min. 1 report 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, 7:55 PM EDT (23:55 UTC)
Expired: Sep 7, 2021, 8:28 PM EDT
In force: 33 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lenawee County, MI

The radar

The Detroit radar (KDTX), 101 km from the middle of the area, began a volume at 23:59 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
Sep 7, 8:04 PM EDT	TSTM WND DMG	3 Nne Hudson, MI	DISPATCH REPORTS LARGE BRANCHES AND POWER LINES DOWN IN THE CITIES OF ADDISON AND HUDSON.

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
Sep 7, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.9 hours before the alert went out and 105 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1621 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

907 
WUUS53 KDTX 072355
SVRDTX
MIC091-080100-
/O.NEW.KDTX.SV.W.0113.210907T2355Z-210908T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Detroit/Pontiac MI
755 PM EDT Tue Sep 7 2021

The National Weather Service in Detroit/Pontiac has issued a

* Severe Thunderstorm Warning for...
  Lenawee County in southeastern Michigan...

* Until 900 PM EDT.

* At 754 PM EDT, a severe thunderstorm was located near Hillsdale,
  moving east at 55 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...
  Hudson and Addison around 805 PM EDT.
  Clayton around 810 PM EDT.
  Adrian around 820 PM EDT.
  Blissfield around 830 PM EDT.
  Deerfield around 835 PM EDT.

Other locations impacted by this severe thunderstorm include Seneca,
Manitou Beach-Devils Lake, Macon, Lime Creek, Munson, Ogden Center,
Canandaigua, Ridgeway, Palmyra and Tipton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4207 8436 4208 8378 4172 8377 4171 8435
TIME...MOT...LOC 2354Z 279DEG 49KT 4193 8450 

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

$$

SF

2 follow-up statements

453 
WWUS53 KDTX 080010
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
810 PM EDT Tue Sep 7 2021

MIC091-080100-
/O.CON.KDTX.SV.W.0113.000000T0000Z-210908T0100Z/
Lenawee MI-
810 PM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR LENAWEE COUNTY...

At 810 PM EDT, a severe thunderstorm was located near Onsted, or 9
miles northeast of Hudson, moving east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe storm will be near...
  Adrian around 820 PM EDT.
  Tecumseh around 825 PM EDT.
  Britton around 835 PM EDT.
  Deerfield around 840 PM EDT.

Other locations impacted by this severe thunderstorm include Rome
Center, Manitou Beach-Devils Lake, Macon, Springville, Cambridge
Junction, Ridgeway, Palmyra, Tipton, Holloway and Rollin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4207 8436 4208 8378 4184 8377 4183 8435
TIME...MOT...LOC 0010Z 271DEG 44KT 4196 8422 

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

$$

AM

452 
WWUS53 KDTX 080028
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
828 PM EDT Tue Sep 7 2021

MIC091-080037-
/O.CAN.KDTX.SV.W.0113.000000T0000Z-210908T0100Z/
Lenawee MI-
828 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR LENAWEE COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds to 
40 mph and heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southeastern Michigan.

LAT...LON 4207 8436 4208 8378 4184 8377 4183 8435
TIME...MOT...LOC 0026Z 279DEG 49KT 4192 8390 

$$

AM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 2:51 PM EDT	Special Marine Warning	DTX		114 min
Sep 7, 2:54 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland	66 min
Sep 7, 3:07 PM EDT	Tornado Warning	DTX	Bay, Midland	31 min
Sep 7, 3:24 PM EDT	Severe Thunderstorm Warning	DTX	Huron	66 min
Sep 7, 3:30 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	75 min
Sep 7, 3:31 PM EDT	Special Marine Warning	DTX		77 min
Sep 7, 3:53 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	82 min
Sep 7, 4:03 PM EDT	Special Marine Warning	DTX		92 min
Sep 7, 4:19 PM EDT	Special Weather Statement	DTX	Sanilac	56 min
Sep 7, 4:38 PM EDT	Special Weather Statement	DTX	Genesee, Lapeer, Shiawassee	82 min
Sep 7, 4:45 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	31 min
Sep 7, 5:14 PM EDT	Special Weather Statement	DTX	Tuscola	61 min
Sep 7, 5:24 PM EDT	Special Weather Statement	DTX	Saginaw	66 min
Sep 7, 5:49 PM EDT	Areal Flood Advisory	DTX	Saginaw	3 hr
Sep 7, 5:55 PM EDT	Severe Thunderstorm Warning	DTX	Livingston, Shiawassee	80 min
Sep 7, 6:12 PM EDT	Special Weather Statement	DTX	Sanilac	78 min
Sep 7, 6:18 PM EDT	Special Marine Warning	DTX		97 min
Sep 7, 6:22 PM EDT	Special Weather Statement	DTX	Tuscola	53 min
Sep 7, 6:23 PM EDT	Special Weather Statement	DTX	Washtenaw	52 min
Sep 7, 6:29 PM EDT	Special Weather Statement	DTX	Arenac	46 min
Sep 7, 6:45 PM EDT	Special Weather Statement	DTX	Oakland	30 min
Sep 7, 6:46 PM EDT	Areal Flood Advisory	DTX	Tuscola	3 hr
Sep 7, 6:54 PM EDT	Special Marine Warning	DTX		88 min
Sep 7, 7:00 PM EDT	Special Weather Statement	DTX	Bay	30 min
Sep 7, 7:14 PM EDT	Special Marine Warning	DTX		61 min
Sep 7, 7:21 PM EDT	Special Weather Statement	DTX	Lapeer, Macomb, Saint Clair	24 min
Sep 7, 7:25 PM EDT	Special Weather Statement	DTX	Huron	35 min
Sep 7, 7:33 PM EDT	Special Weather Statement	DTX	Genesee, Shiawassee	57 min
Sep 7, 7:36 PM EDT	Severe Thunderstorm Warning	DTX	Shiawassee	17 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every 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.