Alert archive / Ohio / Flash Flood Warnings in 1993

Flash Flood Warning 25, NWS Wilmington, OH

July 2, 1993Mercer County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jul 2, 1993, 10:21 PM EDT for Mercer County, Ohio. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 2, 1993, 10:21 PM EDT (02:21 UTC)
Expired
Jul 3, 1993, 2:30 AM EDT
In force
4 hr
Issued by
NWS Wilmington, OH
Area
Whole counties

County Mercer County, OH

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 2.4 hours before the alert went out and 80 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 00:00Z on 1993-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1993-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood 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, Jul 2, 7:46 PM EDT, 2 hours 35 minutes before
OHZ008-INZ013-KYZ005-030045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
745 PM EDT (645 PM EST) FRI JUL 2 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ALL OF THE
CINCINNATI TRI STATE AREA UNTIL 1100 PM EDT (1000 PM EST)...

...A FLOOD WATCH REMAINS IN EFFECT FOR SOUTHWEST OHIO THROUGH TONIGHT...

AT 735 PM EDT...WEATHER SERVICE RADAR DETECTED AN AREA OF SCATTERED
SHOWERS AND THUNDERSTORMS IN A 140 MILE WIDE BAND THAT EXTENDED FROM
WINCHESTER KENTUCKY 70 MILES SOUTHEAST OF CINCINNATI...TO 70 MILES NORTH
OF INDIANAPOLIS. THESE STORMS HAVE WEAKED SLIGHTLY SINCE 530 PM
EDT.

THE MOST INTENSE THUNDERSTORMS WERE IN A 50 MILE WIDE BAND THAT EXTENDED
FROM DAYTON OHIO...TO 75 MILES NORTH OF DAYTON. AN ADDITIONAL LINE OF
SHOWERS AND THUNDERSTORMS EXTENDED FROM 30 MILES EAST OF
INDIANAPOLIS...TO 70 MILES SOUTHWEST OF INDIANAPOLIS.

ALL SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR.

THE GREATER CINCINNATI AREA MAY SEE THUNDERSTORMS REDEVELOPING AFTER
900 PM EDT. PERSONS WITHIN THE TRI STATE SHOULD STAY TUNED TO NOAA
WEATHER RADIO OR THE COMMERCIAL MEDIA FOR ANY POTENTIALLY SEVERE
THUNDERSTORMS THAT MAY DEVELOP LATER THIS EVENING.

DIAN
Special weather statement, Jul 2, 8:05 PM EDT, 2 hours 16 minutes before
OHZ006-007-009-011-020100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBUS OH
804 PM EDT THU JUL 1 1993

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR UNION...MADISON...AND
FAYETTE COUNTIES UNTIL 11 PM EDT.

A FLOOD WATCH IS IN EFFECT FOR ALL OF CENTRAL OHIO TONIGHT.

AT 755 PM NATIONAL WEATHER SERVICE RADAR INDICATED SCATTERED STRONG
THUNDERSTORMS MOVING INTO WESTERN FAYETTE COUNTY FROM GREENE AND CLINTON
COUNTIES.  THESE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR...AND
WILL MOVE ACROSS THE NORTHERN HALF OF FAYETTE COUNTY AND INTO SOUTHERN
MADISON COUNTY BETWEEN 8 PM AND 9 PM.

THESE STORMS WILL PRODUCE BRIEF VERY HEAVY RAIN...LIGHTNING STRIKES...
GUSTY WINDS TO 35 MILES AN HOUR...AND POSSIBLY SMALL HAIL.  THE BRIEF
VERY HEAVY RAIN COULD CAUSE PONDING OF WATER ON ROADS AND LOW-LYING
AREAS.  IF THESE STORMS HOLD TOGETHER...THEY COULD REACH THE COLUMBUS
METROPOLITAN AREA BETWEEN 930 PM AND 10 PM.

OTHER STRONG THUNDERSTORMS WERE MOVING ACROSS WESTERN OHIO...AND WILL
MOVE INTO CENTRAL OHIO AND REACH UNION AND MARION COUNTIES BETWEEN 10 PM
AND 11 PM.

PEOPLE THROUGHOUT CENTRAL OHIO SHOULD SEEK INSIDE SHELTER IF STORMS
APPROACH.  WITH THE GROUND ALREADY SATURATED FROM RECENT HEAVY
RAINFALL...ANY ADDITIONAL HEAVY RAINFALL TONIGHT WILL LIKELY CAUSE MORE
FLOODING.  PEOPLE LIVING IN FLOOD PRONE AREAS AND NEAR STREAMS AND
CREEKS SHOULD CLOSELY MONITOR THE LATEST WEATHER INFORMATION.

LISTEN TO NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS.

GROH
Special weather statement, Jul 2, 8:50 PM EDT, 1 hour 31 minutes before
OHZ008-INZ013-KYZ005-030145-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
848 PM EDT (748 PM EST) FRI JUL 2 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ALL OF THE
CINCINNATI TRI STATE AREA UNTIL 1100 PM EDT (1000 PM EST)...

...A FLOOD WATCH REMAINS IN EFFECT FOR ALL OF SOUTHWEST OHIO THIS
EVENING...

AT 840 PM EDT...WEATHER SERVICE RADAR DETECTED A LARGE AREA OF SCATTERED
SHOWERS AND THUNDERSTORMS COVERING PORTIONS OF NORTHERN KENTUCKY...MUCH
OF EASTERN AND SOUTHERN INDIANA...AND MUCH OF WESTERN OHIO. STORMS
WITHIN THIS AREA HAVE WEAKENED SLIGHTLY SINCE 730 PM EDT.

THE STORMS POSING THE GREATES THREAT TO THE GREATER CINCINNATI AREA WAS
A 30 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS EXTENDING FROM RICHMOND
INDIANA...TO 60 MILES WEST OF CINCINNATI.

THESE STORMS WERE MOVING MOSTLY EAST AT 30 MILES AN HOUR.

ALTHOUGH THESE STORMS HAVE WEAKENED SLIGHTLY...THE GREATEST THREAT FOR
THE TRI STATE IS HEAVY RAIN. ONE THUNDERSTORM PRODUCED ONE INCH OF RAIN
IN 20 MINUTES NEAR THE BORDER OF JENNINGS AND RIPLEY COUNTIES IN
SOUTHEAST INDIANA. STORMS WITHIN THIS BAND ALSO HAVE THE POTENTIAL TO
PRODUCE SMALL HAIL AND DAMAGING WINDS.

DIAN
Special weather statement, Jul 2, 8:50 PM EDT, 1 hour 31 minutes before
OHZ008-INZ013-KYZ005-030145-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
848 PM EDT (748 PM EST) FRI JUL 2 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ALL OF THE
CINCINNATI TRI STATE AREA UNTIL 1100 PM EDT (1000 PM EST)...

...A FLOOD WATCH REMAINS IN EFFECT FOR ALL OF SOUTHWEST OHIO THIS
EVENING...

AT 840 PM EDT...WEATHER SERVICE RADAR DETECTED A LARGE AREA OF SCATTERED
SHOWERS AND THUNDERSTORMS COVERING PORTIONS OF NORTHERN KENTUCKY...MUCH
OF EASTERN AND SOUTHERN INDIANA...AND MUCH OF WESTERN OHIO. STORMS
WITHIN THIS AREA HAVE WEAKENED SLIGHTLY SINCE 730 PM EDT.

THE STORMS POSING THE GREATES THREAT TO THE GREATER CINCINNATI AREA WAS
A 30 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS EXTENDING FROM RICHMOND
INDIANA...TO 60 MILES WEST OF CINCINNATI.

THESE STORMS WERE MOVING MOSTLY EAST AT 30 MILES AN HOUR.

ALTHOUGH THESE STORMS HAVE WEAKENED SLIGHTLY...THE GREATEST THREAT FOR
THE TRI STATE IS HEAVY RAIN. ONE THUNDERSTORM PRODUCED ONE INCH OF RAIN
IN 20 MINUTES NEAR THE BORDER OF JENNINGS AND RIPLEY COUNTIES IN
SOUTHEAST INDIANA. STORMS WITHIN THIS BAND ALSO HAVE THE POTENTIAL TO
PRODUCE SMALL HAIL AND DAMAGING WINDS.

DIAN
Special weather statement, Jul 2, 9:54 PM EDT, 27 minutes before
OHZ008-INZ013-KYZ005-030300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
953 PM EDT (853 PM EST) FRI JUL 2 1993

...THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR ALL OF SOUTHEAST
INDIANA EXCEPT FOR OHIO AND SWITZERLAND COUNTIES. THE WATCH REMAINS IN
EFFECT FOR ALL OF SOUTHWEST OHIO AND NORTHERN KENTUCKY UNTIL 1100 PM EDT
.
...A FLOOD WATCH REMAINS IN EFECT FOR SOUTHWEST OHIO OVERNIGHT...

...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL ALL OF SOUTHEAST INDIANA
TONIGHT...

AT 945 PM EDT...WEATHER SERVICE RADAR DETECTED A LARGE AREA OF WEAKENING
SHOWERS AND THUNDERSTORMS IN A 170 MILE WIDE BAND THAT EXTENDED FROM 125
MILES WEST OF CINCINNATI...TO 50 MILES NORTH OF COLUMBUS OHIO. THE
THUNDERSTORMS HAVE WEAKENED SINCE 830 PM EDT.

THE STRONGEST THUNDERSTORMS WERE 30 MILES SOUTH OF COLUMBUS OHIO. A BAND
OF SHOWERS AND THUNDERSTORMS...SOME PRODUCING HEAVY RAIN...WAS PASSING
THROUGH THE GREATER CINCINATI AREA. THESE STORMS CAN PRODUCE GUSTY WINDS
TO 35 MILES AN HOUR...BUT THE BIGGEST THREAT FROM THESE STORMS WAS THE
HEAVY DOWNPOURS.

ALL SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR.

PERSONS WITHIN THE GREATER CINCINNATI AREA SHOULD BE AWARE OF
THUNDERSTORMS THAT CAN PRODUCE HEAVY RAIN...GUSTY WINDS AND DANGEROUS
CLOUD TO GROUND LIGHTNING.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES ON THIS WEATHER
EVENT.

DIAN
Special weather statement, Jul 2, 9:54 PM EDT, 27 minutes before
OHZ008-INZ013-KYZ005-030300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CINCINNATI OH
953 PM EDT (853 PM EST) FRI JUL 2 1993

...THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR ALL OF SOUTHEAST
INDIANA EXCEPT FOR OHIO AND SWITZERLAND COUNTIES. THE WATCH REMAINS IN
EFFECT FOR ALL OF SOUTHWEST OHIO AND NORTHERN KENTUCKY UNTIL 1100 PM EDT
.
...A FLOOD WATCH REMAINS IN EFECT FOR SOUTHWEST OHIO OVERNIGHT...

...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL ALL OF SOUTHEAST INDIANA
TONIGHT...

AT 945 PM EDT...WEATHER SERVICE RADAR DETECTED A LARGE AREA OF WEAKENING
SHOWERS AND THUNDERSTORMS IN A 170 MILE WIDE BAND THAT EXTENDED FROM 125
MILES WEST OF CINCINNATI...TO 50 MILES NORTH OF COLUMBUS OHIO. THE
THUNDERSTORMS HAVE WEAKENED SINCE 830 PM EDT.

THE STRONGEST THUNDERSTORMS WERE 30 MILES SOUTH OF COLUMBUS OHIO. A BAND
OF SHOWERS AND THUNDERSTORMS...SOME PRODUCING HEAVY RAIN...WAS PASSING
THROUGH THE GREATER CINCINATI AREA. THESE STORMS CAN PRODUCE GUSTY WINDS
TO 35 MILES AN HOUR...BUT THE BIGGEST THREAT FROM THESE STORMS WAS THE
HEAVY DOWNPOURS.

ALL SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR.

PERSONS WITHIN THE GREATER CINCINNATI AREA SHOULD BE AWARE OF
THUNDERSTORMS THAT CAN PRODUCE HEAVY RAIN...GUSTY WINDS AND DANGEROUS
CLOUD TO GROUND LIGHTNING.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES ON THIS WEATHER
EVENT.

DIAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 8:32 PM EDTFlash Flood WarningILNChampaign, Logan3 hr
Jul 2, 10:38 PM EDTTornado WarningILNKnox67 min

Nearby

Flash Flood Warnings in Ohio, 1993Every flash flood warning in 1993

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.