Alert archive / Ohio / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 39, NWS Northern Indiana

August 4, 1997Williams County, Ohio

NWS Northern Indiana issued this severe thunderstorm warning at Aug 4, 1997, 1:19 AM EDT for Williams County, Ohio. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 4, 1997, 1:19 AM EDT (05:19 UTC)
Expired: Aug 4, 1997, 2:00 AM EDT
In force: 41 min
Issued by: NWS Northern Indiana
Area: Whole counties

County Williams County, OH

What was reported inside it

Time	Report	Where	Remark
Aug 4, 1:35 AM EDT	Hail 1	Montpelier, OH

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 5.3 hours before the alert went out and 160 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: 467 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFWA 040520 RRA
SVRFWA
OHC171-040600-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WAYNE IN
1219 AM EST (119 AM EDT) MON AUG 4 1997
 
THE NATIONAL WEATHER SERVICE IN FORT WAYNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  100 AM EST (200 AM EDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST OHIO
 
   ...WILLIAMS COUNTY
 
AT 1215 AM EST/115 AM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A
SEVERE THUNDERSTORM 10 MILES NORTH OF MONTPELIER OHIO OR 50 MILES
NORTHEAST OF FORT WAYNE INDIANA.  THIS STORM WAS MOVING TO THE
SOUTHEAST AT 25 MPH AND WILL MOVE THROUGH WEST UNITY OHIO AROUND
135 AM EDT.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 2:11 AM EDT	Severe Thunderstorm Warning	IWX	Defiance	49 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1997 Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.