Alert archive / Ohio / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 372
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 1998, 7:45 PM EDT for 57 counties in Ohio; Pleasants County, West Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 1998, 7:45 PM EDT (23:45 UTC)
- Expired
- May 21, 1998, 1:00 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 58 counties
Allen County, OH, Ashland County, OH, Athens County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Paulding County, OH, Perry County, OH, Pickaway County, OH, Portage County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH, Pleasants County, WV
The radar
The Cincinnati radar (KILN), 134 km from the middle of the area, began a volume at 23:47 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
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 10:33 PM EDT | Severe Thunderstorm Warning | ILN | Montgomery | 57 min |
| May 20, 10:53 PM EDT | Severe Thunderstorm Warning | ILN | Greene | 57 min |
| May 20, 11:05 PM EDT | Severe Thunderstorm Warning | ILN | Clinton | 60 min |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.8 hours before the alert went out and 133 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.
- Mixed-layer CAPE
- 7 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 5:00 PM EDT | Severe Thunderstorm Watch | SPC | Lawrence, Scioto | 5 hr |
| May 20, 7:30 PM EDT | Severe Thunderstorm Watch | SPC | Logan, McDowell, Mercer, Mingo, Wyoming | 4 hr |
Nearby
Severe Thunderstorm Watches in Ohio, 1998Severe Thunderstorm Watches in West Virginia, 1998Every severe thunderstorm watch in 1998
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.