Alert archive / Ohio / Flash Flood Warnings in 1998
Flash Flood Warning 45, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Jun 11, 1998, 9:47 AM EDT for Shelby County, Ohio. 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
- Jun 11, 1998, 9:47 AM EDT (13:47 UTC)
- Expired
- Jun 11, 1998, 12:45 PM EDT
- In force
- 3 hr
- 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 13:42 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 12:00Z, 1.8 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
- 1257 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 619 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILN 111347 FFWILN OHC149-111645- BULLETIN FLOOD WARNING NATIONAL WEATHER SERVICE WILMINGTON OH 947 AM EDT THU JUN 11 1998 THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A * FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS FOR... SHELBY COUNTY IN WEST CENTRAL OHIO. * EFFECTIVE UNTIL 1245 PM EDT. *AT 945 AM EDT NATIONAL WEATHER SERVICE RADAR INDICATED THAT OVER 2 INCHES OF RAIN HAD FALLEN DURING THE MORNING HOURS ACROSS PARTS OF SHELBY COUNTY. ALSO...REPORTS FROM SIDNEY INDICATED THAT 1.5 INCHES OF RAIN HAD FALLEN THERE IN ONLY 30 MINUTES. SOME MINOR STREET FLOODING WAS ALREADY REPORTED WITH THIS HEAVY RAINFALL. *RADAR INDICATED THAT THUNDERSTORMS WITH MODERATE TO HEAVY RAINFALL WILL CONTINUE FOR THE REMAINDER OF THE MORNING HOURS AND INTO THE EARLY AFTERNOON HOURS ACROSS SHELBY COUNTY. *RESIDENTS SHOULD KEEP AN EYE TO AREA CREEKS AND STREAMS... ESPECIALLY LORAMIE CREEK IN THE WESTERN PART OF THE COUNTY...WHICH HAS A HISTORY OF RA PID RISES. DURING HEAVY RAINS...KEEP CHILDREN AWAY FROM STORM DRAINS AND CREEKS. SHALLOW...GENTLY FLOWING WATER CAN BECOME A RAGING TORRENT IN A MATTER OF MINUTES. 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 Jun 11, 9:46 AM EDT, 1 minute earlier.
Area forecast discussion, Jun 11, 9:46 AM EDT, 1 minute before
FORECAST COORDINATION MESSAGE NATIONAL WEATHER SERVICE WILMINGTON OH 946 AM EDT THU JUN 11 1998 WSFOS: RCMD FIRST PD FFA FOR NORTHERN KY/SE INDIANA...AND THE DAY-CVG GROUPS IN SW OHIO. DISC: CONDITIONS REMAIN RIPE TODAY FOR +RA AND SVR WX. ILN SOUNDING ANALYZED WITH A CAPE ARND 1770 J/KG...K INDEX OF 41...AND AN IMPRESSIVE -7 SHOWALTER. CONVECTIVE ACTIVITY THIS MORNING IS WIDESPREAD...HAVING FORMED IN AN AXIS OF HIGH THETA-E AIR AHEAD OF A 40-50 LLJ THROUGH THE MS AND LOWER OH VALLEYS. ALSO NOTED A WELL DEFINED TROPICAL CONNECTION ON WATER VAPOR IMAGERY EXTENDING INTO THE EAST PACIFIC. LATEST SHORT RANGE GUIDANCE...INCLUDING THE 09Z RUC...INDICATE A GRADUAL SHIFT TO THE NORTH OF THE BEST MSTR CONVERGENCE/PCPN EFFICIENCY. THIS WUD ALLOW THE +RA AXIS CURRENTLY FROM CENTRAL INDIANA INTO SOUTHERN OHIO TO GRADUALLY LIFT OUT. CONCERN ATTM IS THAT CONVECTION WL ACTUALLY REMAIN ANCHORED ALONG MESOSCALE BOUNDARIES FURTHER SOUTH...WHERE FFG VALUES ARE QUITE LOW. BASED ON NEAR EXCEESIVE AMNTS WHICH HAVE ALREADY FALLEN...AND POTENTIAL FOR ADDITIONAL +RA...RCMD FFA FOR THE SOUTHWEST 2/3 OF THE FA INCLUDING N KY...SE IN..AND THE DAY/CVG AREAS. CURRENT TEMP/SVR WORDING LOOK GOOD. JOHNSTONE
In the hours before
Special weather statement, Jun 11, 8:07 AM EDT, 1 hour 40 minutes before
INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-120000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 807 AM EDT (707 AM EST) THU JUN 11 1998 ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT... VERY WARM...HUMID AND UNSTABLE AIR WILL BE ACROSS THE AREA TODAY AND TONIGHT. AT TIMES...NUMEROUS THUNDERSTORMS WILL MOVE ACROSS THE AREA WITH A FEW SEVERE STORMS POSSIBLE. SOME CITIES IN THE WATCH AREA ARE CINCINNATI...DAYTON... WAPAKONETA...COLUMBUS...PORTSMOUTH...RICHMOND INDIANA... AND MAYSVILLE KENTUCKY. THE PRIMARY THREAT FROM THESE STORMS ARE DAMAGING STRAIGHT LINE WINDS AND LARGE HAIL. SKYWARN SPOTTER ACTIVATION MAY BE NEEDED. SANDLER
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 8:39 PM EDT | Severe Thunderstorm Warning | ILN | Brown | 16 min |
| Jun 11, 10:51 AM EDT | Flash Flood Warning | ILN | Butler, Hamilton | 2 hr |
| Jun 11, 10:51 AM EDT | Flash Flood Warning | ILN | Clermont | 2 hr |
| Jun 11, 11:13 AM EDT | Flash Flood Warning | ILN | Darke | 3 hr |
| Jun 11, 11:13 AM EDT | Flash Flood Warning | ILN | Miami | 3 hr |
| Jun 11, 11:33 AM EDT | Flash Flood Warning | ILN | Hamilton | 3 hr |
| Jun 11, 11:33 AM EDT | Flash Flood Warning | ILN | Clermont | 3 hr |
| Jun 11, 12:44 PM EDT | Flash Flood Warning | ILN | Shelby | 3 hr |
| Jun 11, 2:48 PM EDT | Flash Flood Warning | ILN | Adams, Brown | 102 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.