Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 24, NWS Northern Indiana

June 20, 2021Fulton County, Williams County, Ohio; Hillsdale County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jun 20, 2021, 7:29 PM EDT for Fulton County, Williams County, Ohio; Hillsdale County, Michigan. It was in force for 31 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: Jun 20, 2021, 7:29 PM EDT (23:29 UTC)
Expired: Jun 20, 2021, 8:00 PM EDT
In force: 31 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Hillsdale County, MI, Fulton County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 109 km from the middle of the area, began a volume at 23:31 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
Jun 20, 7:54 PM EDT	TSTM WND DMG	3 E Pittsford, MI	3 TREES DOWNED ACROSS SE HALF OF COUNTY.

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
Jun 20, 6:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.5 hours before the alert went out and 143 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: 46 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

631 
WUUS53 KIWX 202329
SVRIWX
MIC059-OHC051-171-210000-
/O.NEW.KIWX.SV.W.0024.210620T2329Z-210621T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
729 PM EDT Sun Jun 20 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hillsdale County in southeastern Michigan...
  Northeastern Williams County in northwestern Ohio...
  Northwestern Fulton County in northwestern Ohio...

* Until 800 PM EDT.

* At 729 PM EDT, a severe thunderstorm was located over Holiday City,
  or near Montpelier, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts and half dollar 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...
  Fayette around 745 PM EDT.
  Hudson around 800 PM EDT.

Other locations impacted by this severe thunderstorm include
Prattville, West Jefferson, Alvordton, Betzer, Bridgewater Center,
Waldron and Kunkle.

This includes Interstate 80 in Ohio between mile markers 9 and 18.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4155 8455 4164 8468 4193 8436 4171 8436
      4171 8427
TIME...MOT...LOC 2329Z 229DEG 31KT 4163 8455 

HAIL...1.25IN
WIND...60MPH
 
$$

JBALL

1 follow-up statement

191 
WWUS53 KIWX 202350
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
750 PM EDT Sun Jun 20 2021

MIC059-OHC051-171-210000-
/O.CON.KIWX.SV.W.0024.000000T0000Z-210621T0000Z/
Hillsdale MI-Williams OH-Fulton OH-
750 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTHEASTERN HILLSDALE...NORTHEASTERN WILLIAMS AND NORTHWESTERN
FULTON COUNTIES...

At 749 PM EDT, a severe thunderstorm was located near Fayette, or 7
miles south of Hudson, moving northeast 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 storm will be near...
  Hudson around 800 PM EDT.

Other locations impacted by this severe thunderstorm include
Prattville, Waldron, Alvordton and Betzer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4162 8442 4171 8459 4193 8436 4171 8436
      4171 8427
TIME...MOT...LOC 2349Z 229DEG 31KT 4175 8437 

HAIL...1.00IN
WIND...60MPH
 
$$

Brown

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 9:21 PM EDT	Severe Thunderstorm Warning	IWX	Williams	39 min
Jun 19, 8:20 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	40 min
Jun 19, 8:51 PM EDT	Areal Flood Advisory	IWX	Cass, Saint Joseph	3 hr
Jun 19, 9:59 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	17 min
Jun 20, 5:12 AM EDT	Beach Hazards Statement	IWX		49 hr
Jun 20, 6:42 PM EDT	Severe Thunderstorm Warning	IWX	Cass	26 min
Jun 20, 6:58 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	28 min
Jun 20, 7:19 PM EDT	Severe Thunderstorm Warning	IWX	Saint Joseph	41 min
Jun 20, 7:49 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	26 min
Jun 20, 7:58 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	32 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2021 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.