Alert archive / Ohio / Tornado Warnings in 1990

Tornado Warning 13, NWS Wilmington, OH

July 9, 1990Knox County, Ohio

NWS Wilmington, OH issued this tornado warning at Jul 9, 1990, 7:35 PM EDT for Knox County, Ohio. It was in force for 60 min.

The area

The counties it named.

The facts

Issued: Jul 9, 1990, 7:35 PM EDT (23:35 UTC)
Expired: Jul 9, 1990, 8:35 PM EDT
In force: 60 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Knox County, OH

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 12:00Z, 11.6 hours before the alert went out and 161 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: 1078 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMFD 092338 RRA
TORMFD
OHC083-100035-                                                      

BULLETIN-EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MANSFIELD OH
735 PM EDT MON JUL 9 1990 

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE
UNTIL 835 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

OHIO...KNOX

AT 735 PM EDT THE KNOX COUNTY SHERIFFS DEPT. REPORTED A TORNADO
3 MILES NORTH OFFREDRICTOWN MOVING EAST AT 35 MPH.

PEOPLE IN THE PATH OF THE TORNADO SHOULD GO TO A SAFE PLACE IMMEDIATE
LY.
THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STU
RDY
FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR
ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS...O
R
CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.

DB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 12:35 PM EDT	Severe Thunderstorm Warning	ILN	Richland	55 min
Jul 9, 12:50 PM EDT	Severe Thunderstorm Warning	ILN	Ashland	40 min
Jul 9, 1:19 PM EDT	Severe Thunderstorm Warning	ILN	Mercer	56 min
Jul 9, 1:53 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize	67 min
Jul 9, 2:13 PM EDT	Severe Thunderstorm Warning	ILN	Darke, Shelby	62 min
Jul 9, 3:46 PM EDT	Severe Thunderstorm Warning	ILN	Greene, Montgomery	59 min
Jul 9, 4:43 PM EDT	Severe Thunderstorm Warning	ILN	Greene	32 min
Jul 9, 4:49 PM EDT	Severe Thunderstorm Warning	ILN	Clinton, Warren	56 min
Jul 9, 5:44 PM EDT	Severe Thunderstorm Warning	ILN	Greene	61 min
Jul 9, 5:45 PM EDT	Severe Thunderstorm Warning	ILN	Crawford, Richland	60 min
Jul 9, 5:54 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	66 min
Jul 9, 6:07 PM EDT	Severe Thunderstorm Warning	ILN	Clark	68 min
Jul 9, 6:14 PM EDT	Flash Flood Warning	ILN	Clark, Greene	2 hr
Jul 9, 6:24 PM EDT	Severe Thunderstorm Warning	ILN	Preble	66 min
Jul 9, 6:56 PM EDT	Severe Thunderstorm Warning	ILN	Montgomery	34 min
Jul 9, 7:24 PM EDT	Severe Thunderstorm Warning	ILN	Warren	66 min
Jul 9, 7:25 PM EDT	Severe Thunderstorm Warning	ILN	Greene	35 min
Jul 9, 7:35 PM EDT	Severe Thunderstorm Warning	ILN	Clinton	55 min

Nearby

Tornado Warnings in Ohio, 1990 Every tornado warning in 1990 Tornadoes in 1990

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.