Alert archive / Ohio / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 113, NWS Wilmington, OH

September 29, 1990Greene County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Sep 29, 1990, 5:20 PM EDT for Greene County, Ohio. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: Sep 29, 1990, 5:20 PM EDT (21:20 UTC)
Expired: Sep 29, 1990, 6:15 PM EDT
In force: 55 min
Issued by: NWS Wilmington, OH
Area: Whole counties

County Greene 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, 9.3 hours before the alert went out and 35 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: 37 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDAY 292120
SVRDAY
OHC057-292215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE DAYTON OH
520 PM EDT SAT SEP 29 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 615 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE STATE OF OHIO
      GREENE

AT 519 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE
SEVERE THUNDERSTORM IN WESTERN GREENE COUNTY OHIO.

THE STORM WAS MOVING EAST AT 15 MPH AND WILL MOVE ACROSS THE CITY
XENIA BETWEEN 530 AND 600 PM EDT.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND NEAR WINDOWS.  DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED.  MOTORISTS
SHOULD AVOID LOW WATER CROSSINGS.

IF THREATENING WEATHER APPROACHES... YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY AND ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR SEVERE WEATHER REPORTS TO THE L_OCAL NATIONAL WEATHER SERVICE
OFFICE.

 HARLEY

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 29, 4:37 PM EDT, 43 minutes before

OHZ005-010-292135-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTON OH
435 PM EDT SAT SEP 29 1990

THUNDERSTORMS WERE DEVELOPING RAPIDLY OVER MONTGOMERY AND MIAMI
COUNTIES OF WESTERN OHIO AT 435 PM EDT.

AT 435 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED A THUNDERSTORM
WITH VERY HEAVY RAIN...STRONG GUSTY WINDS...AND POSSIBLY SMALL
HAIL JUST NORTH OF THE DAYTON AIRPORT NEAR TIPP CITY OHIO.

THIS THUNDERSTORM PRODUCED A WIND GUST OF 44 MPH AT THE DAYTON
AIRPORT AT 423 PM EDT. THE STORM WAS MOVING SOUTHEAST AT 15 MPH...AND
SHOULD MOVE ACROSS THE CITIES OF DAYTON AND SPRINGFIELD BETWEEN
500 AND 530 PM.

PEOPLE IN WESTERN OHIO SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER
CONDIT5IONS...AND BE PREPARED TO TAKE SHELTER IF THREATENING WEATHER
APPROACHES.
.
HARLEY

Special weather statement, Sep 29, 4:38 PM EDT, 42 minutes before

OHZ008-INZ013-KYZ005-292140-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
437 PM EDT SAT SEP 29 1990

AT 430 THIS EVENING WEATHER SERVICE RADAR SHOWED THE RAPID DEVELOPMENT
OF A LINE OF THUNDERSTORMS OVER SOUTHWEST OHIO AND SOUTHEAST INDIANA.

THE LINE OF STORMS WAS FROM DAYTON OHIO TO CINCINNATI... THEN EXTENDED
SOUTHWEST TO LOUISVILLE KENTUCKY.

NO MOVEMENT HAS YET BEEN DETERMINED.

AS THESE STORMS CONTIN8UE TO DEVELOP IN AND AROUND THE CINCINNATI TRISTATE
AREA... YOU CAN EXPECT LOCALLY HEAVY RAIN...FREQUENT LIGHTNING...SMALL
HAIL AND GUSTY THUNDERSTORM WINDS.

MANUEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 29, 5:14 PM EDT	Severe Thunderstorm Warning	ILN	Clark	61 min
Sep 29, 6:40 PM EDT	Severe Thunderstorm Warning	ILN	Brown, Highland	65 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1990 Every severe thunderstorm warning 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.