Alert archive / Kentucky / Flash Flood Warnings in 1998
Flash Flood Warning 8, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Apr 8, 1998, 2:36 AM EDT for Boone County, Kentucky; Ohio County, Indiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 8, 1998, 2:36 AM EDT (06:36 UTC)
- Expired
- Apr 8, 1998, 5:35 AM EDT
- In force
- 3 hr
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
Counties Ohio County, IN, Boone County, KY
The radar
The Cincinnati radar (KILN), 102 km from the middle of the area, began a volume at 06:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.6 hours before the alert went out and 104 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1470 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 385 m²/s²
- 0-3 km storm-relative helicity
- 517 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILN 080637 FFWILN INC115-KYC015-080935- BULLETIN FLOOD WARNING NATIONAL WEATHER SERVICE WILMINGTON OH 236 AM EDT WED APR 8 1998 THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS EFFECTIVE UNTIL 535 AM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHERN KENTUCKY ...BOONE COUNTY IN SOUTHEASTERN INDIANA ...OHIO COUNTY ...THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS OHIO AND BOONE COUNTIES... THUNDERSTORMS WHICH WERE PRODUCING VERY HEAVY RAIN WERE MOVING ACROSS OHIO COUNTY SOUHTEAST INDIANA AND NORTHERN BOONE COUNTY IN NORTHERN KENTUCKY. WEATHER SERVICE DOPPLER RADAR WAS ESTIMATING BETWEEN 1 AND 1.5 INCHES OF RAINFALL BETWEEN 130 AM EDT AND 230 AM EDT (1230 AM EST AND 130 AM EST). THUNDERSTORMS WILL CONTINUE TO TRACK ACROSS OHIO AND BOONE COUNTIES THROUGH 430 AM EDT (330 AM EST). THIS ADDITIONAL RAINFALL WILL LIKELY CAUSE FLOODING OF LOW LYING AREAS AND AREA CREEKS TO RISE ABOVE BANKFULL. 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 QUICKLY. MOVE TO HIGHER GROUND. RANDALL
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.
NWS Wilmington, OH wrote its last area forecast discussion before this flash flood warning went out at Apr 7, 9:00 PM EDT, 5 hours 36 minutes earlier.
Area forecast discussion, Apr 7, 9:00 PM EDT, 5 hours 36 minutes before
FORECAST COORDINATION MESSAGE NATIONAL WEATHER SERVICE WILMINGTON OH 900 PM EDT TUE APR 7 1998 FCST CHALLENGES THRU PD ARE CHC/S FOR TSTMS. LTST SFC ANLYS SHWS LO PRES OVR SRN IA WITH WRMFNT XTNDG ESE ACRS CNTRL IL SRN IN AND ACRS XTRM NRN KY. TSTMS HV DVLPD ALONG WRMFNT IN AREA OF GOOD MOIST FLUX CNVRGC. WHERE INSTBY IS GREATEST ACRS CNTRL IL AND CNTRL IN...WHERE STMS HV EXCEEDED SVR LIMITS. INSTBY HS BEEN LIMITING FACTOR OVR NRN KY AND SRN OH. DWPT AXIS SHIFTS E INTO SRN OH BY 06Z WITH AREA IN LEFT FRONT QUAD OF UPR JET. XPCT TSVMS TO CONT TO DVLP ESE ALONG AND N OF WRMFNT INTO ERN IN AND WRN OH. WITH LOSS OF DAYTIME HEATG AND WITH STMS MOVG INTO MORE STABLE AIR OVR OH WE EXPCT SOME WEAKENING TO OCCUR. SLO MOVG WRMFNT MOVG NWD WL DIMINISH THREAT FOR TSTMS ACRS NRN KY AND SRN OH TNGT...WHILE GREATER THREAT WL CONT ALONG AND N OF BNDRY. SUGG TRENDING TSTM POPS THIS WAY. XPCT A LULL IN ACTION LTR TNGT THRU FIRST PART OF WED. AMS RELOADS ON WED EVE WITH APPRCH OF UPR LO. GREATEST THREAT FOR SVR-WX APPEARS TO BE OVR FAR SRN OH AND NRN KY WHERE BEST DIFF. POSITIVE VORTICITY IS EXPECTED. CVG 054/075 338 DAY 050/073 548 CMH 051/074 447 PRT 055/075 337 AVX 050/070 646 RANDALL
In the hours before
Special weather statement, Apr 7, 10:53 PM EDT, 3 hours 43 minutes before
INZ073>075-080-080900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 1053 PM EDT (953 PM EST) TUE APR 7 1998 ...TORNADO WATCH IN EFFECT FOR SOUTHEAST INDIANA UNTIL 5 AM EDT (4 AM EST)... A WARM FRONT WHICH EXTENDS FROM CENTRAL ILLINOIS THROUGH SOUTHEAST INDIANA HAS BEEN THE FOCUS FOR THUNDERSTORM DEVELOPMENT TO OUR WEST. SEVERE THUNDERSTORMS WITH A HISTORY OF TORNADOES HAVE DEVELOPED ALONG AND NORTH OF THIS WARM FRONT ACROSS CENTRAL ILLINOIS AND WEST CENTRAL INDIANA. ADDITIONAL THUNDERSTORMS HAVE DEVELOPED ACROSS SOUTHWEST INDIANA AND SOUTHERN ILLINOIS IN THE WARM AIR SECTOR. THE THREAT FOR SEVERE THUNDERSTORMS WHICH MAY PRODUCE TORNADOES IS EXPECTED TO SPREAD EAST ACROSS SOUTHERN INDIANA OVERNIGHT. THE FOLLOWING COUNTIES ARE IN A TORNADO WATCH UNTIL 5 AM EDT (4 AM EST): FRANKLIN...RIPLEY...DEARBORN...OHIO AND SWITZERLAND. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. RANDALL
Special weather statement, Apr 8, 1:43 AM EDT, 53 minutes before
OHZ026-034-035-042>045-051>054-060>063-070>072-077>081-INZ050- 058-059-066-073>075-080-KYZ091>093-081000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 143 AM EDT WED APR 8 1998 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF WESTERN OHIO EXTREME NORTHERN KENTUCKY...AND SOUTHEASTERN INDIANA UNTIL 600 AM EDT (500 AM EST)... THIS WATCH REPLACES THE TORNADO WATCH THAT WAS PREVIOUSLY IN EFFECT FOR SOUTHEASTERN INDIANA. SOME CITIES INCLUDED IN THE WATCH AREA ARE CINCINNATI...DAYTON... COVINGTON KENTUCKY...SPRINGFIELD...RICHMOND INDIANA. NUMEROUS THUNDERSTORMS WERE MOVING ACROSS INDIANA INTO WESTERN OHIO EARLY THIS MORNING. THESE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL AND WIND GUSTS IN EXCESS OF 60 MPH. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES. WILKINSON
Special weather statement, Apr 8, 1:43 AM EDT, 53 minutes before
OHZ026-034-035-042>045-051>054-060>063-070>072-077>081-INZ050- 058-059-066-073>075-080-KYZ091>093-081000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 143 AM EDT WED APR 8 1998 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF WESTERN OHIO EXTREME NORTHERN KENTUCKY...AND SOUTHEASTERN INDIANA UNTIL 600 AM EDT (500 AM EST)... THIS WATCH REPLACES THE TORNADO WATCH THAT WAS PREVIOUSLY IN EFFECT FOR SOUTHEASTERN INDIANA. SOME CITIES INCLUDED IN THE WATCH AREA ARE CINCINNATI...DAYTON... COVINGTON KENTUCKY...SPRINGFIELD...RICHMOND INDIANA. NUMEROUS THUNDERSTORMS WERE MOVING ACROSS INDIANA INTO WESTERN OHIO EARLY THIS MORNING. THESE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL AND WIND GUSTS IN EXCESS OF 60 MPH. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES. WILKINSON
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 2:17 AM EDT | Severe Thunderstorm Warning | ILN | Boone | 33 min |
| Apr 8, 2:40 AM EDT | Tornado Warning | ILN | Boone | 50 min |
| Apr 8, 3:05 AM EDT | Severe Thunderstorm Warning | ILN | Campbell, Kenton | 45 min |
| Apr 8, 3:37 AM EDT | Flash Flood Warning | ILN | Campbell, Kenton | 118 min |
| Apr 8, 1:01 AM EDT | Severe Thunderstorm Warning | ILN | Ripley | 49 min |
| Apr 8, 1:21 AM EDT | Tornado Warning | ILN | Switzerland | 49 min |
| Apr 8, 1:39 AM EDT | Severe Thunderstorm Warning | ILN | Dearborn, Ohio | 61 min |
| Apr 8, 2:11 AM EDT | Severe Thunderstorm Warning | ILN | Switzerland | 44 min |
| Apr 8, 2:32 AM EDT | Flash Flood Warning | ILN | Dearborn | 118 min |
Nearby
Flash Flood Warnings in Kentucky, 1998Flash Flood Warnings in Indiana, 1998Every flash flood warning in 1998
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; radar from the NEXRAD Level II archive.