Alert archive / Ohio / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 252, NWS Charleston, WV

August 4, 1994Madison County, Ohio

NWS Charleston, WV issued this severe thunderstorm warning at Aug 4, 1994, 3:46 PM EDT for Madison County, Ohio. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Aug 4, 1994, 3:46 PM EDT (19:46 UTC)
Expired
Aug 4, 1994, 4:45 PM EDT
In force
59 min
Issued by
NWS Charleston, WV
Area
Whole counties

County Madison County, OH

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 12:00Z, 7.8 hours before the alert went out and 68 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-pSkew-T log-p diagram, Dayton/James M C, OH at 12:00Z on 1994-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 531 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dayton/James M C, OH at 12:00Z on 1994-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
531 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCMH 041949 RRA
SVRCMH
OHC097-042045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBUS OH
346 PM EDT THU AUG 4 1994
 
THE NATIONAL WEATHER SERVICE IN COLUMBUS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  445 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY......
 
IN CENTRAL OHIO
 
   ...MADISON COUNTY
 
AT 345 PM EDT NATIONAL WEATHER SERVICE RADAR IN COLUMBUS WAS SHOWING A
POSSIBLE SEVERE THUNDERSTORM ENTERING MADISON COUNTY. THE STORM WAS 5
MILES WEST OF LONDON.
 
THE STORM WAS MOVING EAST AT 30 MILES AN HOUR.
 
SOME CITIES IN THE PATH OF THIS STORM ARE SUMMERFORD...LONDON...LAYFETTE
AND WEST JEFFERSON.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  THESE THUNDERSTORMS
COULD PRODUCE VERY HEAVY RAIN WHICH COULD CAUSE URBAN AND SMALL
STREAM FLOODING.  MOVE TO HIGHER GROUND IF FLOODING IS OBSERVED.
 
ONDREJIK

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 4:00 PM EDTSevere Thunderstorm WarningRLXFranklin60 min
Aug 4, 4:31 PM EDTSevere Thunderstorm WarningRLXFairfield, Licking59 min
Aug 4, 5:29 PM EDTSevere Thunderstorm WarningRLXFayette61 min
Aug 4, 5:48 PM EDTSevere Thunderstorm WarningRLXAthens, Morgan44 min
Aug 4, 5:55 PM EDTSevere Thunderstorm WarningRLXMuskingum37 min
Aug 4, 6:07 PM EDTSevere Thunderstorm WarningRLXRoss68 min
Aug 4, 6:22 PM EDTSevere Thunderstorm WarningRLXHocking, Vinton62 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1994Every severe thunderstorm warning in 1994

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.