Alert archive / Ohio / Severe Thunderstorm Watches in 1999

Severe Thunderstorm Watch 577

July 23, 199936 counties in Ohio; 5 counties in Pennsylvania

The Storm Prediction Center issued this severe thunderstorm watch at Jul 23, 1999, 6:00 PM EDT for 36 counties in Ohio; 5 counties in Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 23, 1999, 6:00 PM EDT (22:00 UTC)
Expired: Jul 24, 1999, 12:00 AM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 41 counties

Allen County, OH, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Crawford County, OH, Cuyahoga County, OH, Defiance County, OH, Erie County, OH, Fulton County, OH, Geauga County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Ottawa County, OH, Paulding County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH, Crawford County, PA, Erie County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA

The radar

The Cleveland radar (KCLE), 77 km from the middle of the area, began a volume at 21:59 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.

Warnings issued inside it

8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 23, 6:06 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Richland	24 min
Jul 23, 6:06 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Richland	39 min
Jul 23, 6:19 PM EDT	Severe Thunderstorm Warning	IWX	Fulton	46 min
Jul 23, 6:35 PM EDT	Severe Thunderstorm Warning	CLE	Erie, Huron	40 min
Jul 23, 6:44 PM EDT	Severe Thunderstorm Warning	CLE	Morrow, Richland	46 min
Jul 23, 6:53 PM EDT	Severe Thunderstorm Warning	CLE	Lucas	37 min
Jul 23, 7:24 PM EDT	Severe Thunderstorm Warning	CLE	Wood	36 min
Jul 23, 7:53 PM EDT	Tornado Warning	CLE	Wood	37 min

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.0 hours before the alert went out and 156 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: 28 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 1152 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 73 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Severe Thunderstorm Watches in Ohio, 1999 Severe Thunderstorm Watches in Pennsylvania, 1999 Every severe thunderstorm watch in 1999

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.