Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 94, NWS Northern Indiana

August 11, 20215 counties in Ohio

NWS Northern Indiana issued this severe thunderstorm warning at Aug 11, 2021, 2:48 PM EDT for 5 counties in Ohio. It was in force for 57 min. 5 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
Aug 11, 2021, 2:48 PM EDT (18:48 UTC)
Expired
Aug 11, 2021, 3:45 PM EDT
In force
57 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Allen County, OH, Defiance County, OH, Henry County, OH, Putnam County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 145 km from the middle of the area, began a volume at 18:47 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
Aug 11, 2:57 PM EDTTSTM WND DMG2 Ese Needmore, OHREPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN.
Aug 11, 3:00 PM EDTTSTM WND DMGGomer, OHDELAYED REPORT. SEVERAL 1 TO 2 FT DIAMETER LIMBS DOWNED, A FEW LARGER TREES OF 2 TO 3 FEET IN DIAMETER DOWNED. TREES APPEARED HEALTHY IN PHOTOS.
Aug 11, 3:02 PM EDTTSTM WND GST 53Kalida, OHMESONET STATION DW3681 KALIDA.
Aug 11, 3:15 PM EDTTSTM WND DMGYoder, OHTWO TREES AND SEVERAL POWERLINES DOWN.
Aug 11, 3:25 PM EDTTSTM WND GST 542 Wnw Westminster, OHASOS STATION KAOH LIMA.

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.

IssuedProductOfficeLasted
Aug 11, 11:50 AM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.8 hours before the alert went out and 156 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, Cncnati-Daytn, OH at 12:00Z on 2021-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1853 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2021-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939Sfc1 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
1853 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

554 
WUUS53 KIWX 111848
SVRIWX
OHC003-039-069-137-161-111945-
/O.NEW.KIWX.SV.W.0094.210811T1848Z-210811T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
248 PM EDT Wed Aug 11 2021

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  Putnam County in west central Ohio...
  Southeastern Defiance County in northwestern Ohio...
  Southeastern Henry County in northwestern Ohio...
  Southeastern Van Wert County in west central Ohio...
  Allen County in west central Ohio...

* Until 345 PM EDT.

* At 247 PM EDT, severe thunderstorms were located along a line
  extending from near Defiance to near Continental to 7 miles west of
  Spencerville, moving east at 45 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lima, Delphos, Ottawa, Bluffton, Fort Shawnee, Spencerville,
  Columbus Grove, Leipsic, Elida, Deshler, Kalida, Continental,
  Pandora, Holgate, Glandorf, Ottoville, Spencerville In Allen
  County, Hamler, Cairo and Fort Jennings.

This includes Interstate 75 between mile markers 119 and 141.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Northern Indiana.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 4064 8411 4066 8411 4066 8422 4069 8422
      4069 8443 4136 8423 4134 8388 4064 8388
TIME...MOT...LOC 1847Z 274DEG 38KT 4133 8430 4103 8432 4072 8449 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CM
1 follow-up statement
789 
WWUS53 KIWX 111931
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
331 PM EDT Wed Aug 11 2021

OHC039-161-111940-
/O.CAN.KIWX.SV.W.0094.000000T0000Z-210811T1945Z/
Defiance OH-Van Wert OH-
331 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DEFIANCE AND
SOUTHEASTERN VAN WERT COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
northwestern and west central Ohio.

LAT...LON 4064 8411 4066 8411 4066 8422 4069 8422
      4069 8439 4091 8417 4104 8409 4135 8399
      4134 8388 4064 8388
TIME...MOT...LOC 1930Z 274DEG 38KT 4130 8371 4100 8373 4069 8390 

$$

OHC003-069-137-111945-
/O.CON.KIWX.SV.W.0094.000000T0000Z-210811T1945Z/
Putnam OH-Henry OH-Allen OH-
331 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR EASTERN PUTNAM...SOUTHEASTERN HENRY AND ALLEN COUNTIES...

At 330 PM EDT, severe thunderstorms were located along a line
extending from near Weston to near Rawson to near Alger, moving east
at 45 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Lima, Ottawa, Bluffton, Fort Shawnee, Spencerville, Columbus Grove,
Leipsic, Elida, Deshler, Pandora, Glandorf, Spencerville In Allen
County, Hamler, Cairo, Harrod, Beaverdam, West Leipsic, Gilboa,
Belmore and Yoder.

This includes Interstate 75 between mile markers 119 and 141.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Northern Indiana.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 4064 8411 4066 8411 4066 8422 4069 8422
      4069 8439 4091 8417 4104 8409 4135 8399
      4134 8388 4064 8388
TIME...MOT...LOC 1930Z 274DEG 38KT 4130 8371 4100 8373 4069 8390 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 12:56 AM EDTSpecial Weather StatementIWXPaulding, Van Wert49 min
Aug 11, 1:22 AM EDTSpecial Weather StatementIWXDefiance, Paulding, Van Wert23 min
Aug 11, 7:28 AM EDTSpecial Weather StatementIWXPutnam32 min
Aug 11, 7:57 AM EDTSpecial Weather StatementIWXPutnam33 min
Aug 11, 8:35 AM EDTSpecial Weather StatementIWXAllen, Van Wert40 min
Aug 11, 9:07 AM EDTAreal Flood WarningIWXAllen, Putnam3 hr
Aug 11, 1:48 PM EDTSevere Thunderstorm WarningIWXDefiance, Paulding, Van Wert27 min
Aug 11, 2:02 PM EDTSevere Thunderstorm WarningIWXDefiance, Fulton, Henry, Williams43 min
Aug 11, 2:14 PM EDTSevere Thunderstorm WarningIWXDefiance, Paulding, Putnam, Van Wert46 min
Aug 11, 2:44 PM EDTSevere Thunderstorm WarningIWXDefiance, Fulton, Henry, Williams46 min

Nearby

Severe Thunderstorm Warnings in Ohio, 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.