Alert archive / Ohio / Flash Flood Warnings in 1998
Flash Flood Warning 12, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Apr 9, 1998, 5:49 AM EDT for Shelby County, Ohio. It was in force for 116 min. 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 9, 1998, 5:49 AM EDT (09:49 UTC)
- Expired
- Apr 9, 1998, 7:45 AM EDT
- In force
- 116 min
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
County Shelby County, OH
The radar
The Cincinnati radar (KILN), 107 km from the middle of the area, began a volume at 09:53 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, 9.8 hours before the alert went out and 106 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
- 149 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1572 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILN 090949 FFWILN OHC149-091145- BULLETIN FLOOD WARNING NATIONAL WEATHER SERVICE WILMINGTON OH 549 AM EDT THU APR 9 1998 THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A FLOOD WARNING FOR SMALL STREAMS EFFECTIVE UNTIL 745 AM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL OHIO ...SHELBY COUNTY AT 545 AM EDT NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF VERY HEAVY SHOWERS AND THUNDERSTORMS HEADING NORTH TOWARD SHELBY COUNTY. FROM 1 TO 2 INCHES OF RAINFALL CAN BE EXPECTED FROM THESE STORMS. PARTS OF NORTHERN AND CENTRAL SHELBY COUNTY RECEIVED AN ESTIMATED 2 TO 4 INCHES OF RAIN ON WEDNESDAY EVENING. NUMEROUS ROADS WERE REPORTED TO BE FLOODED EARLIER IN THE NIGHT. THIS NEXT AREA OF RAINFALL MAY CAUSE FURTHER FLOODING OF COUNTY CREEKS AND STREAMS. RESIDENTS AND MOTORISTS IN SHELBY COUNTY SHOULD KEEP AN EYE ON AREA CREEKS AND STREAMS EARLY THIS MORNING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER CJOVERS 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. WILKINSON
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 9, 3:06 AM EDT, 2 hours 43 minutes earlier.
Area forecast discussion, Apr 9, 3:06 AM EDT, 2 hours 43 minutes before
FORECAST COORDINATION MESSAGE NATIONAL WEATHER SERVICE WILMINGTON OH 306 AM EDT THU APR 9 1998 06Z SFC ANALYSIS INDICATED LOW PRES OVR CNTRL IN WITH PRESSURE FALLS INDICATING THE DEVELOPING LOW OVR KY. MODELS INDICATE THAT THE KY LOW WL BECOME THE MAIN LOW BY 12Z AND TRACK INTO S-CNTRL OH. KILN 88D SHOWS A DIVERGING PRECIP PATTERN INDICATING STRONG UPPER DIVERGENCE AND LIFT. THE DRY AREA IN THE PRECIP WAS BEGINNING TO FILL IN OVER THE LAST FEW SCANS SO XPCT MORE PRECIP TO MOVE INTO SRN FA THROUGH DAYBREAK. MODELS BRING H5 VORT INTO FA DURING THE MORNING HOURS. A DECREASE IN MEAN RH IS PROGD OVR SRN FA SO PRECIP MAY DECREASE IN COVERAGE THERE THIS AM. HOWEVER...LOOKS LIKE A WASH OUT FOR NRN FA WITH -SHRA AND CHC TSRA ALL DAY. MODEL PRECIP EFFICIENCY AND MEAN RH INDICATE BY THE LATE PM PRECIP WL PUSH BACK TOWARD THE SRN FA. THUS...SUGGEST CAT POPS DAY-CMH AND SWD TO THE OH RIVER. MAY BE ABLE TO LWR TO LIKELY OVR NRN KY. PRECIP WL CONTINUE OVERNIGHT AS A TROF DROPS SWD ACROSS FA. SHOULD BE ABLE TO KEEP THUNDER OUT TONIGHT XCPT FOR PMH-CVG. TEMPS WL BE MUCH COOLER TODAY AS FA SHIFTS TO THE BACKSIDE OF THE LOW. MOS GUIDANCE LOOKS REASONABLE. WILKINSON
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 10:25 PM EDT | Severe Thunderstorm Warning | ILN | Logan | 30 min |
| Apr 8, 10:46 PM EDT | Severe Thunderstorm Warning | ILN | Hardin | 54 min |
| Apr 9, 12:33 AM EDT | Flash Flood Warning | ILN | Logan, Shelby | 117 min |
| Apr 9, 6:41 AM EDT | Flash Flood Warning | ILN | Logan | 119 min |
Nearby
Flash Flood Warnings in Ohio, 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.