Alert archive / Ohio / Flash Flood Warnings in 1990
Flash Flood Warning 41, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Aug 21, 1990, 12:35 AM EDT for Greene County, Montgomery County, Ohio. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1990, 12:35 AM EDT (04:35 UTC)
- Expired
- Aug 21, 1990, 3:30 AM EDT
- In force
- 3 hr
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
Counties Greene County, OH, Montgomery 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 00:00Z, 4.6 hours before the alert went out and 22 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.
- Mixed-layer CAPE
- 58 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 1115 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDAY 210435
FFWDAY
OHC057-113-210730-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE DAYTON OH
1235 AM EDT TUE AUG 21 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A URBAN AND SMALL
STREAM FLOOD WARNING EFFECTIVE UNTIL 330 AM EDT FOR PEOPLE IN
THE FOLLOWING COUNTIES
IN THE STATE OF OHIO
GREENE...MONTGOMERY
AT 1234 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED
THUNDERSTORMS WITH HEAVY RAIN OVER MONTGOMERY AND GREENE COUNTIES
IN WESTERN OHIO. THE SHOWERS AND THUNDERSTORMS EXTENDED INTO
EASTERN INDIANA...AND WERE MOVING EAST AT ABOUT 30 MPH.
ONE TO TWO INCHES OF RAIN FELL OVER PARTS OF MONTGOMERY AND
GREENE COUNTIES EARLIER THIS EVENING...AND THE ADDITIONAL RAIN
WILL LIKELY CAUSE SOME LOCALIZED FLOODING...ESPECIALLY IN
LOW LYING AREAS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED IMMEDIATELY.
MOVE TO HIGHER GROUND.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOOD WATERS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
HARLEYWhat 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, Aug 20, 8:17 PM EDT, 4 hours 18 minutes before
OHZ006-007-009-210115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBUS OH 816 PM EDT MON AUG 20 1990 THUNDERSTORMS WITH PERIODS OF VERY HEAVY RAINFALL...FREQUENT LIGHTNING AND POSSIBLE SMALL HAIL WERE MOVING INTO CENTRAL OHIO THIS EVENING. AT 810 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER MUCH OF SOUTHWEST AND SOUTH-CENTRAL OHIO. THE LEADING EDGE OF THE THUNDERSTORMS WAS FROM JUST SOUTH OF PLAIN CITY....EAST OF LONDON TO WASHINGTON COURTHOUSE...THEN DOWN TO GREENFIELD IN HIGHLAND COUNTY. THESE THUNDERSTRORM WERE MOVING EAST AT 20 MILES AN HOUR AND WILL MOVE ACROSS MADISON AND FAYETTE COUNTIES OF CENTRAL OHIO BY 915 PM EDT. PEOPLE SHOULD LISTEN TO LOCAL TELEVISION AND RADIO STATIONS AND NOAA WEATHER RADIO FOR LATER STATEMENTS. HEAVY RAIN FROM SOME OF THE THUNDERSTORMS COULD CAUSE PONDING OF WATER ON ROADWAYS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERqS THE ROAD. RH
Special weather statement, Aug 20, 11:14 PM EDT, 1 hour 21 minutes before
OHZ008-INZ013-KYZ005-210445- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CINCINNATI OH 1110 PM EDT MON AUG 20 1990 THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS AND FREQUENT LIGHTNING IN SOUTHEAST INDIANA WERE MOVING INTO THE GREATER CINCINNATI AND NORTHERN KENTUCKY AT 1107 PM EDT. AT 1109 PM EDT WEATHER SERVICE RADAR SHOWED THUNDERSTORMS WERE OCCURRING IN DEARBORN COUNTY INDIANA...ABOUT 18 MILES WEST OF CINCINNATI. AS STORMS MOVE BACK IN THE GREATER CINCINNATI AREA OF...OHIO AND SWITZERLAND COUNTIES OF INDIANA...BUTLER AND HAMILTON COUNTIES OF OHIO AND BOONE...KENTON AND GRANT COUNTIES OF KENTUCKY PEOPLE CAN EXPECT WIND GUST TO 40 MILES AN HOUR...RAINFALL THAT WILL REDUCE VISIBILITIES TO NEAR ZERO AND SEVERAL LIGHTNING STRIKES CAUSING POSSIBLE POWER OUTAGE FROM 1120 PM UNTIL AFTE MIDNIGHT. SAM
Special weather statement, Aug 20, 11:28 PM EDT, 1 hour 7 minutes before
OHZ005-010-210425- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTON OH 1125 PM EDT MON AUG 20 1990 THUNDERSTORMS WITH HEAVY RAIN AND GUSTY WINDS MOVING ACROSS WESTERN OHIO AT 1120 PM EDT. AT 1120 PM WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM SOUTH OF LIMA OHIO TO DAYTON JUST WEST OF CICINNATI OHIO. THESE SHOWERS AND THUNDERSTORMS ALSO EXTENDED WESTWARD AS FAR AS MUNCIE AND COLUMBUS INDIANA. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL. SOME PONDING OF WATER MAY OCCUR WITH THE HEAVY RAIN ESPECIALLY IN LOW LYING AREAS. PADGETT
Special weather statement, Aug 20, 11:34 PM EDT, 1 hour 1 minute before
OHZ005-010-210425- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE DAYTON OH 1130 PM EDT MON AUG 20 1990 THUNDERSTORMS WITH HEAVY RAIN AND GUSTY WINDS WERE MOVING ACROSS WESTERN OHIO AT 1120 PM EDT. AT 1120 PM WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM SOUTH OF LIMA OHIO TO DAYTON TO JUST WEST OF CICINNATI OHIO. THESE SHOWERS AND THUNDERSTORMS ALSO EXTENDED WESTWARD AS FAR AS MUNCIE AND COLUMBUS INDIANA. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL. SOME PONDING OF WATER MAY OCCUR WITH THE HEAVY RAIN ESPECIALLY IN LOW LYING AREAS. PADGETT ...CORRECTED WORDING...
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 3:07 AM EDT | Flash Flood Warning | ILN | Richland | 3 hr |
| Aug 21, 4:46 PM EDT | Flash Flood Warning | ILN | Butler, Hamilton, Warren | 119 min |
| Aug 21, 7:15 PM EDT | Flash Flood Warning | ILN | Darke | 3 hr |
Nearby
Flash Flood Warnings in Ohio, 1990Every flash flood 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.