Alert archive / Ohio / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 103, NWS Cleveland, OH

July 22, 2017Knox County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 22, 2017, 6:55 AM EDT for Knox County, Ohio. It was in force for 50 min. 4 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 22, 2017, 6:55 AM EDT (10:55 UTC)
Expired: Jul 22, 2017, 7:45 AM EDT
In force: 50 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Knox County, OH

The radar

The Cleveland radar (KCLE), 130 km from the middle of the area, began a volume at 10:56 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 22, 7:17 AM EDT	TSTM WND DMG	Martinsburg, OH	KNOX COUNTY SHERIFF DISPATCH NOTED NUMEROUS TREES DOWNED ACROSS THE COUNTY. SEVERAL TREES WERE DOWNED IN THE MARTINSBURG AREA. TIME IS ESTIMATED VIA THE KCLE AND TCMH RADARS.
Jul 22, 7:20 AM EDT	TSTM WND DMG	Gambier, OH	KNOX COUNTY SHERIFF DISPATCH NOTED NUMEROUS TREES DOWNED ACROSS THE COUNTY. SEVERAL TREES WERE DOWNED AROUND THE GAMBIER AREA. TIME IS ESTIMATED VIA THE KCLE AND TCMH RADARS.
Jul 22, 7:21 AM EDT	TSTM WND DMG	2 Se Gambier, OH	* 1 INJ * A TREE FELL ONTO A HOME SOUTHEAST OF GAMBIER INJURING AN ELDERLY WOMAN INSIDE.
Jul 22, 7:29 AM EDT	TSTM WND DMG	6 Sse Danville, OH	KNOX COUNTY SHERIFF DISPATCH REPORTED A LARGE TREE DOWNED ON US 36 JUST WEST OF THE COSHOCTON COUNTY LINE.

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, 10.9 hours before the alert went out and 151 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: 111 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1423 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

528 
WUUS51 KCLE 221055
SVRCLE
OHC083-221145-
/O.NEW.KCLE.SV.W.0103.170722T1055Z-170722T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
655 AM EDT SAT JUL 22 2017

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Knox County in north central Ohio...

* Until 745 AM EDT

* At 655 AM EDT, a severe thunderstorm was located over Centerburg,
  or 12 miles west of Mount Vernon, moving east at 45 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...
  Mount Vernon, Fredericktown, Gambier, Utica, Centerburg, Danville,
  Martinsburg, Gann and Bladensburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4024 8248 4027 8248 4028 8274 4035 8275
      4035 8265 4048 8264 4049 8218 4044 8218
      4024 8220
TIME...MOT...LOC 1055Z 273DEG 38KT 4033 8270 

HAIL...1.00IN
WIND...60MPH
 
$$

Kosarik

1 follow-up statement

286 
WWUS51 KCLE 221145
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
745 AM EDT SAT JUL 22 2017

OHC083-221154-
/O.EXP.KCLE.SV.W.0103.000000T0000Z-170722T1145Z/
Knox OH-
745 AM EDT SAT JUL 22 2017

...THE SEVERE THUNDERSTORM WARNING FOR KNOX COUNTY WILL EXPIRE AT 745
AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

LAT...LON 4024 8248 4027 8248 4028 8274 4035 8275
      4035 8265 4048 8264 4049 8218 4044 8218
      4024 8220
TIME...MOT...LOC 1144Z 273DEG 38KT 4030 8204 

$$

Sefcovic

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 5:29 AM EDT	Special Weather Statement	CLE	Knox, Marion, Morrow	91 min
Jul 22, 6:10 AM EDT	Areal Flood Advisory	CLE	Marion	3 hr
Jul 22, 6:34 AM EDT	Areal Flood Advisory	CLE	Morrow	3 hr
Jul 22, 6:46 AM EDT	Severe Thunderstorm Warning	CLE	Morrow	29 min
Jul 22, 7:23 AM EDT	Tornado Warning	CLE	Knox	23 min
Jul 22, 7:43 AM EDT	Special Weather Statement	CLE	Holmes	47 min
Jul 22, 12:56 PM EDT	Flash Flood Warning	CLE	Ashtabula	5 hr
Jul 22, 1:14 PM EDT	Areal Flood Advisory	CLE	Trumbull	4 hr
Jul 22, 3:43 PM EDT	Special Weather Statement	CLE	Stark	62 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2017 Every severe thunderstorm warning in 2017

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.