Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Cleveland, OH

August 12, 2021Geauga County, Portage County, Summit County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 12, 2021, 3:42 PM EDT for Geauga County, Portage County, Summit County, Ohio. It was in force for 48 min. 3 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 12, 2021, 3:42 PM EDT (19:42 UTC)
Expired: Aug 12, 2021, 4:30 PM EDT
In force: 48 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Geauga County, OH, Portage County, OH, Summit County, OH

The radar

The Cleveland radar (KCLE), 43 km from the middle of the area, began a volume at 19:45 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
Aug 12, 3:51 PM EDT	TSTM WND DMG	2 Ese Peninsula, OH	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 ESE PENINSULA. TREE DOWN. TIME ESTIMATED FROM RADAR.
Aug 12, 3:51 PM EDT	TSTM WND DMG	2 Ese Peninsula, OH	TREE DOWN. TIME ESTIMATED FROM RADAR.
Aug 12, 3:57 PM EDT	TSTM WND DMG	2 Ne Cuyahoga Falls, OH	SEVERAL LARGE LIMBS DOWN AND 8 INCH DIAMETER TREES SNAPPED OFF.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 7.7 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: 1075 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

655 
WUUS51 KCLE 121942
SVRCLE
OHC055-133-153-122030-
/O.NEW.KCLE.SV.W.0091.210812T1942Z-210812T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
342 PM EDT Thu Aug 12 2021

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Northern Portage County in northeastern Ohio...
  South central Geauga County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...

* Until 430 PM EDT.

* At 342 PM EDT, a severe thunderstorm was located near Macedonia, or
  12 miles north of Akron, moving east at 20 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect damage to 
           trees and power lines.

* Locations impacted include...
  Ravenna, Cuyahoga Falls, Kent, Hudson, Twinsburg, Streetsboro,
  Macedonia, Garrettsville, Mantua, Stow, Aurora, Brecksville,
  Richfield, Reminderville, Silver Lake, Windham, Hiram, Boston
  Heights, Peninsula and Brady Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4118 8166 4127 8167 4128 8157 4131 8157
      4140 8116 4113 8099 4112 8100
TIME...MOT...LOC 1942Z 254DEG 19KT 4125 8155 

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

$$

Kahn

1 follow-up statement

662 
WWUS51 KCLE 122005
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
405 PM EDT Thu Aug 12 2021

OHC055-122015-
/O.CAN.KCLE.SV.W.0091.000000T0000Z-210812T2030Z/
Geauga OH-
405 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL GEAUGA COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northeastern Ohio.

LAT...LON 4117 8156 4133 8148 4135 8139 4135 8113
      4113 8099 4112 8100
TIME...MOT...LOC 2005Z 254DEG 19KT 4128 8139 

$$

OHC133-153-122030-
/O.CON.KCLE.SV.W.0091.000000T0000Z-210812T2030Z/
Portage OH-Summit OH-
405 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN PORTAGE AND NORTHEASTERN SUMMIT COUNTIES...

At 405 PM EDT, a severe thunderstorm was located near Twinsburg, or
11 miles northwest of Ravenna, moving east at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect damage to 
         trees and power lines.

Locations impacted include...
Ravenna, Cuyahoga Falls, Kent, Hudson, Twinsburg, Streetsboro,
Macedonia, Garrettsville, Mantua, Stow, Aurora, Reminderville, Silver
Lake, Windham, Hiram, Boston Heights, Peninsula, Brady Lake, Sugar
Bush Knolls and Wayland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4117 8156 4133 8148 4135 8139 4135 8113
      4113 8099 4112 8100
TIME...MOT...LOC 2005Z 254DEG 19KT 4128 8139 

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

$$

Kahn

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 4:14 AM EDT	Heat Advisory	CLE	Ashland, Crawford, Cuyahoga, Erie, Hancock, Holmes and 19 more	15 hr
Aug 12, 4:56 AM EDT	Special Marine Warning	CLE		64 min
Aug 12, 5:12 AM EDT	Special Marine Warning	CLE		33 min
Aug 12, 7:33 AM EDT	Special Marine Warning	CLE		87 min
Aug 12, 8:21 AM EDT	Special Weather Statement	CLE	Medina	39 min
Aug 12, 8:59 AM EDT	Special Marine Warning	CLE		71 min
Aug 12, 9:03 AM EDT	Special Weather Statement	CLE	Ashtabula, Lake	42 min
Aug 12, 10:15 AM EDT	Special Weather Statement	CLE	Cuyahoga, Geauga, Portage	45 min
Aug 12, 10:23 AM EDT	Areal Flood Advisory	CLE	Cuyahoga	2 hr
Aug 12, 10:28 AM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Cuyahoga, Geauga, Portage, Summit, Trumbull	47 min
Aug 12, 11:01 AM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Ashtabula, Trumbull	40 min
Aug 12, 3:29 PM EDT	Special Weather Statement	CLE	Portage, Trumbull	46 min
Aug 12, 3:37 PM EDT	Special Weather Statement	CLE	Geauga	53 min
Aug 12, 3:54 PM EDT	Special Weather Statement	CLE	Mahoning	51 min
Aug 12, 4:00 PM EDT	Special Weather Statement	CLE	Summit	45 min
Aug 12, 4:09 PM EDT	Severe Thunderstorm Warning	CLE	Portage, Summit	51 min
Aug 12, 4:27 PM EDT	Severe Thunderstorm Warning	CLE	Geauga, Portage, Summit, Trumbull	63 min
Aug 12, 4:52 PM EDT	Severe Thunderstorm Warning	CLE	Mahoning, Portage	68 min
Aug 12, 6:11 PM EDT	Special Weather Statement	CLE	Morrow, Richland	64 min

Nearby

Severe Thunderstorm Warnings in Ohio, 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.