Alert archive / Ohio / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 12, NWS Cleveland, OH

April 20, 20115 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 20, 2011, 1:29 AM EDT for 5 counties in Ohio. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 20, 2011, 1:29 AM EDT (05:29 UTC)
Expired
Apr 20, 2011, 2:15 AM EDT
In force
46 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

Counties Ashtabula County, OH, Geauga County, OH, Lake County, OH, Portage County, OH, Trumbull County, OH

The radar

The Cleveland radar (KCLE), 89 km from the middle of the area, began a volume at 05:30 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 20, 12:18 AM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 5.5 hours before the alert went out and 148 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, Pittsburgh, PA at 00:00Z on 2011-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Pittsburgh, PA at 00:00Z on 2011-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
-392 J/kg
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
422 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

762 
WUUS51 KCLE 200529
SVRCLE
OHC007-055-085-133-155-200615-
/O.NEW.KCLE.SV.W.0012.110420T0529Z-110420T0615Z/

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

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ASHTABULA COUNTY IN NORTHEAST OHIO
  GEAUGA COUNTY IN NORTHEAST OHIO
  NORTHEASTERN LAKE COUNTY IN NORTHEAST OHIO
  NORTHEASTERN PORTAGE COUNTY IN NORTHEAST OHIO
  NORTHERN TRUMBULL COUNTY IN NORTHEAST OHIO

* UNTIL 215 AM EDT

* AT 126 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  CHARDON TO RAVENNA...AND MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JEFFERSON...
  ASHTABULA...
  MIDDLEFIELD...
  WEST FARMINGTON...
  MADISON...
  NORTH BLOOMFIELD...
  BRISTOLVILLE...
  GENEVA...
  ORWELL...
  CORTLAND...

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 4198 8052 4132 8053 4112 8127 4170 8130
TIME...MOT...LOC 0529Z 244DEG 45KT 4167 8115 4123 8114

$$

OUDEMAN
2 follow-up statements
573 
WWUS51 KCLE 200555
SVSCLE

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

OHC055-085-133-200604-
/O.CAN.KCLE.SV.W.0012.000000T0000Z-110420T0615Z/
PORTAGE OH-GEAUGA OH-LAKE OH-
155 AM EDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LAKE...GEAUGA AND
NORTHEASTERN PORTAGE COUNTIES IS CANCELLED...

THE STORMS HAVE MOVED OUT OF THE WARNED AREA.

&&

LAT...LON 4180 8099 4198 8052 4132 8053 4120 8099
TIME...MOT...LOC 0554Z 244DEG 45KT 4180 8076 4136 8076

$$

OHC007-155-200615-
/O.CON.KCLE.SV.W.0012.000000T0000Z-110420T0615Z/
TRUMBULL OH-ASHTABULA OH-
155 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM EDT
FOR ASHTABULA AND NORTHERN TRUMBULL COUNTIES...

AT 151 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
JEFFERSON TO BRISTOLVILLE...MOVING NORTHEAST AT 50 MPH.

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...KINSMAN...
ANDOVER...NORTH KINGSVILLE AND CONNEAUT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4180 8099 4198 8052 4132 8053 4120 8099
TIME...MOT...LOC 0554Z 244DEG 45KT 4180 8076 4136 8076

$$

OUDEMAN
085 
WWUS51 KCLE 200614
SVSCLE

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

OHC007-155-200624-
/O.EXP.KCLE.SV.W.0012.000000T0000Z-110420T0615Z/
TRUMBULL OH-ASHTABULA OH-
214 AM EDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR ASHTABULA AND NORTHERN
TRUMBULL COUNTIES EXPIRES AT 215 AM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

&&

LAT...LON 4180 8099 4198 8052 4132 8053 4120 8099
TIME...MOT...LOC 0614Z 244DEG 45KT 4191 8045 4147 8046

$$

OUDEMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 12:08 AM EDTSevere Thunderstorm WarningCLECrawford, Hancock, Marion, Seneca, Wyandot67 min
Apr 20, 12:34 AM EDTSpecial Marine WarningCLE86 min
Apr 20, 2:38 AM EDTSevere Thunderstorm WarningCLEHolmes, Knox37 min
Apr 20, 5:42 AM EDTRiver Flood WarningCLELorain35 hr
Apr 20, 9:56 AM EDTRiver Flood WarningCLEHolmes, Wayne35 hr
Apr 20, 11:28 AM EDTRiver Flood WarningCLETrumbull23 hr
Apr 20, 11:31 AM EDTWind AdvisoryCLEAshtabula, Cuyahoga, Geauga, Lake4 hr
Apr 20, 12:44 PM EDTGale WarningCLE9 hr
Apr 20, 12:44 PM EDTSmall Craft AdvisoryCLE27 hr
Apr 20, 2:04 PM EDTRiver Flood WarningCLEOttawa, Sandusky, Wood32 hr
Apr 20, 3:26 PM EDTRiver Flood WarningCLEMarion25 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.