Alert archive / Ohio / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 13, NWS Cleveland, OH

April 20, 2011Holmes County, Knox County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 20, 2011, 2:38 AM EDT for Holmes County, Knox County, Ohio. It was in force for 37 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
Apr 20, 2011, 2:38 AM EDT (06:38 UTC)
Expired
Apr 20, 2011, 3:15 AM EDT
In force
37 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

Counties Holmes County, OH, Knox County, OH

The radar

The Cleveland radar (KCLE), 101 km from the middle of the area, began a volume at 06:38 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
Apr 20, 2:46 AM EDTHAIL 1.256 Ene Mount Vernon, OH

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
Apr 20, 12:18 AM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.6 hours before the alert went out and 164 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.

152 
WUUS51 KCLE 200638
SVRCLE
OHC075-083-200715-
/O.NEW.KCLE.SV.W.0013.110420T0638Z-110420T0715Z/

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

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KNOX COUNTY IN NORTH CENTRAL OHIO
  HOLMES COUNTY IN NORTHEAST OHIO

* UNTIL 315 AM EDT

* AT 234 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR   
  GAMBIER...AND MOVING NORTHEAST AT 55 MPH. ADDITIONAL THUNDERSTORMS 
  MAY ALSO INCREASE IN STRENGTH. OTHER SEVERE THUNDERSTORMS WERE 

* LOCATIONS IMPACTED INCLUDE...
  MILLERSBURG...
  HOLMESVILLE...
  DANVILLE...
  GLENMONT...
  KILLBUCK...
  NASHVILLE...
  BERLIN...

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 4054 8263 4056 8223 4067 8222 4067 8165
      4064 8165 4063 8167 4053 8166 4052 8167
      4044 8167 4045 8217 4024 8220 4024 8244
TIME...MOT...LOC 0637Z 240DEG 48KT 4035 8237

$$

MULLEN
1 follow-up statement
559 
WWUS51 KCLE 200708
SVSCLE

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

OHC083-200718-
/O.CAN.KCLE.SV.W.0013.000000T0000Z-110420T0715Z/
KNOX OH-
308 AM EDT WED APR 20 2011

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EDT
WEDNESDAY MORNING FOR NORTHEASTERN OHIO AND NORTHWEST PENNSYLVANIA.

LAT...LON 4045 8217 4056 8216 4057 8222 4067 8222
      4067 8165 4064 8165 4063 8167 4053 8166
      4052 8167 4044 8167
TIME...MOT...LOC 0708Z 240DEG 48KT 4055 8190

$$

OHC075-200715-
/O.CON.KCLE.SV.W.0013.000000T0000Z-110420T0715Z/
HOLMES OH-
308 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM EDT
FOR HOLMES COUNTY...

AT 303 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS 
IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR KILLBUCK...OR NEAR 
MILLERSBURG...MOVING NORTHEAST AT 55 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
WINESBURG AND WALNUT CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM EDT
WEDNESDAY MORNING FOR NORTHEASTERN OHIO AND NORTHWEST PENNSYLVANIA.

&&

LAT...LON 4045 8217 4056 8216 4057 8222 4067 8222
      4067 8165 4064 8165 4063 8167 4053 8166
      4052 8167 4044 8167
TIME...MOT...LOC 0708Z 240DEG 48KT 4055 8190

$$

MULLEN

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, 1:29 AM EDTSevere Thunderstorm WarningCLEAshtabula, Geauga, Lake, Portage, Trumbull46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.