Alert archive / Ohio / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 11, NWS Cleveland, OH

April 20, 20115 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 20, 2011, 12:08 AM EDT for 5 counties in Ohio. It was in force for 67 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: Apr 20, 2011, 12:08 AM EDT (04:08 UTC)
Expired: Apr 20, 2011, 1:15 AM EDT
In force: 67 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

Counties Crawford County, OH, Hancock County, OH, Marion County, OH, Seneca County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 140 km from the middle of the area, began a volume at 04:10 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
Apr 20, 12:45 AM EDT	TSTM WND DMG	Sycamore, OH	BARN DAMAGE. ROOF OFF HOUSE.
Apr 20, 12:45 AM EDT	TSTM WND DMG	Upper Sandusky, OH	BARN DAMAGE. ROOF OFF HOUSE.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.1 hours before the alert went out and 158 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: 1686 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 474 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 18.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

157 
WUUS51 KCLE 200408
SVRCLE
OHC033-063-101-147-175-200515-
/O.NEW.KCLE.SV.W.0011.110420T0408Z-110420T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
1208 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CRAWFORD COUNTY IN NORTH CENTRAL OHIO
  MARION COUNTY IN NORTH CENTRAL OHIO
  HANCOCK COUNTY IN NORTHWEST OHIO
  SENECA COUNTY IN NORTHWEST OHIO
  WYANDOT COUNTY IN NORTHWEST OHIO

* UNTIL 115 AM EDT

* AT 1206 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTHWEST OF MCCOMB TO
  20 MILES SOUTHWEST OF ARLINGTON...AND MOVING EAST AT 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FINDLAY...
  FOSTORIA...
  UPPER SANDUSKY...
  MARION...
  TIFFIN...
  SYCAMORE...
  BUCYRUS...
  ARLINGTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4117 8389 4117 8342 4121 8342 4125 8284
      4116 8283 4064 8296 4048 8297 4048 8301
      4043 8302 4047 8325 4050 8326 4051 8342
      4068 8343 4070 8350 4081 8351 4082 8389
TIME...MOT...LOC 0408Z 264DEG 50KT 4117 8387 4067 8385

$$

OUDEMAN

2 follow-up statements

203 
WWUS51 KCLE 200453
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1253 AM EDT WED APR 20 2011

OHC063-200501-
/O.CAN.KCLE.SV.W.0011.000000T0000Z-110420T0515Z/
HANCOCK OH-
1253 AM EDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR HANCOCK COUNTY IS CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED EAST OF THE 
COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EDT
WEDNESDAY MORNING FOR NORTHERN OHIO.

LAT...LON 4047 8324 4050 8326 4051 8342 4068 8343
      4070 8350 4081 8351 4099 8346 4100 8342
      4121 8342 4125 8284 4116 8283 4069 8295
      4049 8297 4048 8301 4043 8302
TIME...MOT...LOC 0451Z 263DEG 55KT 4123 8298 4089 8306
          4052 8332

$$

OHC033-101-147-175-200515-
/O.CON.KCLE.SV.W.0011.000000T0000Z-110420T0515Z/
WYANDOT OH-CRAWFORD OH-MARION OH-SENECA OH-
1253 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM EDT
FOR MARION AND WESTERN CRAWFORD COUNTIES IN NORTH CENTRAL OHIO...AND
SENECA AND WYANDOT COUNTIES IN NORTHWEST OHIO...

AT 1248 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG 
A LINE EXTENDING FROM 7 MILES NORTH OF REPUBLIC TO NEVADA TO LA 
RUE...MOVING EAST AT 65 MPH.

THIS STORM HAS PRODUCED WINDS IN EXCESS OF 50 MPH AS IT PASSED 
THROUGH FINDLAY. 

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...WALDO...
ATTICA...MARION...BUCYRUS AND CALEDONIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EDT
WEDNESDAY MORNING FOR NORTHERN OHIO.

&&

LAT...LON 4047 8324 4050 8326 4051 8342 4068 8343
      4070 8350 4081 8351 4099 8346 4100 8342
      4121 8342 4125 8284 4116 8283 4069 8295
      4049 8297 4048 8301 4043 8302
TIME...MOT...LOC 0451Z 263DEG 55KT 4123 8298 4089 8306
          4052 8332

$$

MULLEN

356 
WWUS51 KCLE 200513
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
113 AM EDT WED APR 20 2011

OHC033-101-147-175-200522-
/O.EXP.KCLE.SV.W.0011.000000T0000Z-110420T0515Z/
WYANDOT OH-CRAWFORD OH-MARION OH-SENECA OH-
113 AM EDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR MARION AND WESTERN CRAWFORD
COUNTIES IN NORTH CENTRAL OHIO...AND SENECA AND WYANDOT COUNTIES IN
NORTHWEST OHIO EXPIRES AT 115 AM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EDT
WEDNESDAY MORNING FOR NORTHERN OHIO.

LAT...LON 4047 8324 4050 8326 4051 8342 4068 8343
      4070 8350 4081 8351 4099 8346 4100 8342
      4121 8342 4125 8284 4116 8283 4069 8295
      4049 8297 4048 8301 4043 8302
TIME...MOT...LOC 0512Z 263DEG 50KT 4125 8255 4091 8264
          4054 8290

$$

OUDEMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 12:34 AM EDT	Special Marine Warning	CLE		86 min
Apr 20, 1:29 AM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Geauga, Lake, Portage, Trumbull	46 min
Apr 20, 2:38 AM EDT	Severe Thunderstorm Warning	CLE	Holmes, Knox	37 min
Apr 20, 5:42 AM EDT	River Flood Warning	CLE	Lorain	35 hr
Apr 20, 9:56 AM EDT	River Flood Warning	CLE	Holmes, Wayne	35 hr
Apr 20, 11:28 AM EDT	River Flood Warning	CLE	Trumbull	23 hr
Apr 20, 11:31 AM EDT	Wind Advisory	CLE	Ashtabula, Cuyahoga, Geauga, Lake	4 hr
Apr 20, 12:44 PM EDT	Gale Warning	CLE		9 hr
Apr 20, 12:44 PM EDT	Small Craft Advisory	CLE		27 hr
Apr 20, 2:04 PM EDT	River Flood Warning	CLE	Ottawa, Sandusky, Wood	32 hr
Apr 20, 3:26 PM EDT	River Flood Warning	CLE	Marion	25 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2011 Every severe thunderstorm warning in 2011

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.