Alert archive / Ohio / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 178, NWS Cleveland, OH

July 11, 2011Knox County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 11, 2011, 1:38 PM EDT for Knox County, Ohio. It was in force for 61 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: Jul 11, 2011, 1:38 PM EDT (17:38 UTC)
Expired: Jul 11, 2011, 2:39 PM EDT
In force: 61 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

County Knox County, OH

The radar

The Cleveland radar (KCLE), 127 km from the middle of the area, began a volume at 17:39 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
Jul 11, 1:50 PM EDT	TSTM WND DMG	Fredericktown, OH	ONE TREE DOWN.
Jul 11, 2:35 PM EDT	TSTM WND DMG	Danville, OH	ONE TREE DOWN.

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.

Issued	Product	Office	Lasted
Jul 11, 10:16 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 5.6 hours before the alert went out and 154 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: 95 J/kg
Mixed-layer CIN: -371 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

451 
WUUS51 KCLE 111738
SVRCLE
OHC083-111845-
/O.NEW.KCLE.SV.W.0178.110711T1738Z-110711T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
138 PM EDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 245 PM EDT

* AT 135 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 19 MILES WEST OF
  FREDERICKTOWN...AND MOVING SOUTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOUNT VERNON...
  FREDERICKTOWN...
  CENTERBURG...
  GAMBIER...
  DANVILLE...

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 4024 8244 4025 8247 4027 8248 4028 8275
      4035 8274 4035 8265 4036 8264 4055 8264
      4055 8234 4057 8222 4057 8218 4024 8220
TIME...MOT...LOC 1738Z 306DEG 62KT 4053 8284

$$

LAPLANTE

2 follow-up statements

862 
WWUS51 KCLE 111808
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
208 PM EDT MON JUL 11 2011

OHC083-111845-
/O.CON.KCLE.SV.W.0178.000000T0000Z-110711T1845Z/
KNOX OH-
208 PM EDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR KNOX COUNTY...

AT 207 PM 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 8 MILES NORTHEAST OF GANN TO 6 MILES SOUTH OF MOUNT
VERNON...MOVING EAST AT 45 MPH.

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...
MARTINSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM EDT MONDAY
AFTERNOON FOR NORTHERN OHIO.

&&

LAT...LON 4024 8244 4025 8247 4027 8248 4028 8275
      4035 8274 4035 8265 4036 8264 4055 8264
      4055 8234 4057 8222 4057 8218 4024 8220
TIME...MOT...LOC 1808Z 292DEG 39KT 4052 8204 4030 8250

$$

KUBINA

747 
WWUS51 KCLE 111839
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
239 PM EDT MON JUL 11 2011

OHC083-111849-
/O.CAN.KCLE.SV.W.0178.000000T0000Z-110711T1845Z/
KNOX OH-
239 PM EDT MON JUL 11 2011

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

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM EDT MONDAY
AFTERNOON FOR NORTHERN OHIO.

LAT...LON 4024 8244 4025 8247 4027 8248 4028 8275
      4035 8274 4035 8265 4036 8264 4055 8264
      4055 8234 4057 8222 4057 8218 4024 8220
TIME...MOT...LOC 1839Z 292DEG 39KT 4039 8163 4017 8209

$$

KUBINA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 11:32 AM EDT	Severe Thunderstorm Warning	CLE	Wood	43 min
Jul 11, 11:57 AM EDT	Severe Thunderstorm Warning	CLE	Hancock	63 min
Jul 11, 12:16 PM EDT	Special Marine Warning	CLE		119 min
Jul 11, 12:17 PM EDT	Areal Flood Advisory	CLE	Wood	4 hr
Jul 11, 12:18 PM EDT	Severe Thunderstorm Warning	CLE	Lucas, Wood	57 min
Jul 11, 12:41 PM EDT	Severe Thunderstorm Warning	CLE	Ottawa, Sandusky, Seneca	59 min
Jul 11, 12:44 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	61 min
Jul 11, 12:58 PM EDT	Areal Flood Advisory	CLE	Hancock	4 hr
Jul 11, 12:59 PM EDT	Severe Thunderstorm Warning	CLE	Hancock, Wyandot	47 min
Jul 11, 1:01 PM EDT	Severe Thunderstorm Warning	CLE	Huron, Richland	44 min
Jul 11, 1:14 PM EDT	Severe Thunderstorm Warning	CLE	Erie, Huron	44 min
Jul 11, 1:16 PM EDT	Severe Thunderstorm Warning	CLE	Marion, Morrow, Richland	59 min
Jul 11, 1:21 PM EDT	Severe Thunderstorm Warning	CLE	Ashland	39 min
Jul 11, 1:45 PM EDT	Severe Thunderstorm Warning	CLE	Holmes, Wayne	60 min
Jul 11, 1:51 PM EDT	Special Marine Warning	CLE		84 min
Jul 11, 2:38 PM EDT	Severe Thunderstorm Warning	CLE	Stark, Summit	67 min
Jul 11, 2:49 PM EDT	Severe Thunderstorm Warning	CLE	Ashtabula, Lake	56 min
Jul 11, 3:10 PM EDT	Severe Thunderstorm Warning	CLE	Mahoning, Portage	65 min
Jul 11, 3:17 PM EDT	Special Marine Warning	CLE		88 min

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.