Alert archive / Ohio / Flash Flood Warnings in 1998
Flash Flood Warning 102, NWS Wilmington, OH
NWS Wilmington, OH issued this flash flood warning at Jul 20, 1998, 2:48 AM EDT for Hamilton County, Ohio. It was in force for 2 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
- Jul 20, 1998, 2:48 AM EDT (06:48 UTC)
- Expired
- Jul 20, 1998, 4:50 AM EDT
- In force
- 2 hr
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
County Hamilton County, OH
The radar
The Cincinnati radar (KILN), 67 km from the middle of the area, began a volume at 06:51 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, 6.8 hours before the alert went out and 69 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
- 2300 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 189 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILN 200646 FFWILN OHC061-200850- BULLETIN FLOOD WARNING NATIONAL WEATHER SERVICE WILMINGTON OH 248 AM EDT MON JUL 20 1998 THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A * FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS FOR... HAMILTON COUNTY IN SOUTHWESTERN OHIO. * EFFECTIVE UNTIL 450 AM EDT. AT 248 AM EDT DOPPLER RADAR INDICATED THAT UP TO THREE INCHES OF RAIN HAS FALLEN ACROSS NORTHERN HAMILTON COUNTY SINCE MIDNIGHT. THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE TO MOVE ACROSS THE SAME AREA THROUGH 4 AM WITH ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES. THIS WILL CAUSE FLOODING OF ROADWAYS AND SMALL STREAMS TO RISE ABOVE BANKFULL. * * BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... ACT QUICKLY. PADGETT
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 Jul 20, 2:20 AM EDT, 28 minutes earlier.
Area forecast discussion, Jul 20, 2:20 AM EDT, 28 minutes before
FORECAST COORDINATION MESSAGE NATIONAL WEATHER SERVICE WILMINGTON OH 220 AM EDT MON JUL 20 1998 FORECAST CHALLENGE...CONVECTION POTENTIAL THIS AFTERNOON AND WEDNESDAY. AT THE MOMENT...KILN SHOWS THUNDERSTORMS FROM RICHMOND TO CVG TO HTS. THE WESTERN PART OF THE LINE APPEARS TO BE TRAINING WHILE THE EASTERN IS MORE PROGRESSIVE IN MOVING SOUTH. THE THUNDERSTORM ACTIVITY IS LOCATED IN A MOISTURE CONVERGENCE AREA OVER SOUTHWEST OH WITH CAPE VALUES IN EXCESS OF 4000 J/KG JUST SOUTH OF CVG. IT APPEARS THUNDERSTORM ACTIVITY WILL DRIFT VERY SLOWLY SOUTH AND LIKELY STILL BE IN FAR SOUTHERN CWA AROUND THE BEGINNING OF DAY PERIOD. KIND AND IR IMAGERY ALSO SHOWING ANOTHER STORM SOUTH OF LAF. SO EARLY MORNING PERIOD MAY BE NEEDED. ALL THREE MODELS ARE IN FAIRLY GOOD AGREEMENT WITH SAGGING COLD FRONT INTO FAR SOUTHERN CWA THIS AFTERNOON. AS A RESULT WOULD LIKE TO SEE SOME KIND OF POP FOR THIS AFTERNOON ACROSS IN/KY AND FAR SOUTHERN OH ZONES. REST OF CWA SHOULD BE PARTLY CLOUDY. NEXT THREAT OF STORMS WILL BE TUESDAY LATE AFTERNOON AND EVENING AS COLD FRONT FROM ACTIVE NORTHERN JET STREAM SLIDES SOUTHWARD INTO OHIO VALLEY. ETA HAS PROGGED CAPE VALUES IN EXCESS OF 3000 J/KG PROGGED OVER NW OH AND NRN IN AT 00Z. WOULD LIKE TO SEE A LATE AFTERNOON PERIOD FOR WEST CENTRAL OH ON TUESDAY. FWC AND FAN GUIDANCE LOOK IN THE BALL PARK. DAY 092/071 094/073 090 112 CMH 093/072 095/072 090 112 CVG 092/072 095/073 090 311 PMH 092/072 095/075 092 311 TIPTON
In the hours before
Special weather statement, Jul 19, 10:49 PM EDT, 3 hours 59 minutes before
OHZ026-034-035-042>046-051-052-200330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 1049 PM EDT SUN JUL 19 1998 ...SEVERE THUNDERSTORM WATCH FOR WEST CENTRAL OHIO AND THE NORTHERN PORTIONS OF THE MIAMI VALLEY AND CENTRAL OHIO EXPIRED AT 10 PM EDT... THE LINE OF SEVERE THUNDERSTORMS HAS MOVED SOUTHEAST OF THE REGION. SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING BEHIND THE LINE WILL AFFECT THE REGION FOR THE NEXT SEVERAL HOURS. STAY TUNED TO NOAA WEATHER OR THE MEDIA FOR FURTHER UPDATES. .END/SITES
Local storm report, Jul 19, 10:58 PM EDT, 3 hours 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1058 PM EDT SUN JUL 19 1998
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1049 PM OH 1.75 INCH HAIL
07/19/98 HAMILTON GOLFBALL HAIL REPORTED IN
NORTH CENTRAL PART OF
COUNTY
1015 PM VANDALIA OH 74 MPH TSTM GUST
07/19/98 MONTGOMERY 74 MPH IN VANDALIA
1018 PM OH 80 MPH TSTM GUST
07/19/98 PICKAWAY 80 MPH GUST IN 5 POINTS
1030 PM OH WIND DAMAGE
07/19/98 MIAMI TREES DOWN COUNTYWIDE
1049 PM OH 70 MPH TSTM GUST
07/19/98 GREENE 70 MPH GUST IN BEAVERCREEK
...CORRECTED FOR DAY AND TIMELocal storm report, Jul 19, 11:00 PM EDT, 3 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1058 AM EDT MON JUL 20 1998
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1049 PM OH 1.75 INCH HAIL
07/19/98 HAMILTON GOLFBALL HAIL REPORTED IN
NORTH CENTRAL PART OF
COUNTY
1015 PM VANDALIA OH 70 MPH TSTM GUST
07/19/98 MONTGOMERY 70 MPH IN VANDALIA
1018 PM OH 80 MPH TSTM GUST
07/19/98 PICKAWAY 80 MPH GUST IN 5 POINTS
1030 PM OH WIND DAMAGE
07/19/98 MIAMI TREES DOWN COUNTYWIDE
1049 PM OH 70 MPH TSTM GUST
07/19/98 GREENE 70 MPH GUST IN BEAVERCREEKLocal storm report, Jul 20, 12:04 AM EDT, 2 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1058 PM EDT SUN JUL 19 1998
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1049 PM OH 1.75 INCH HAIL
07/19/98 HAMILTON GOLFBALL HAIL REPORTED IN
NORTH CENTRAL PART OF
COUNTY
1015 PM VANDALIA OH 74 MPH TSTM GUST
07/19/98 MONTGOMERY 74 MPH IN VANDALIA
1018 PM OH 80 MPH TSTM GUST
07/19/98 PICKAWAY 80 MPH GUST IN 5 POINTS
1030 PM OH WIND DAMAGE
07/19/98 MIAMI TREES DOWN COUNTYWIDE
1049 PM OH 70 MPH TSTM GUST
07/19/98 GREENE 70 MPH GUST IN BEAVERCREEK
...CORRECTED FOR DAY AND TIMESpecial weather statement, Jul 20, 12:19 AM EDT, 2 hours 29 minutes before
OHZ054>056-062>065-073-074-200530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 1219 AM EDT MON JUL 20 1998 ...SEVERE THUNDERSTORM WATCH FOR CENTRAL OHIO AND PART OF THE MIAMI VALLEY HAS BEEN CANCELLED... THE LINE OF SEVERE THUNDERSTORMS HAS MOVED SOUTHEAST OF THE REGION. SHOWERS AND THUNDERSTORMS BEHIND THE LINE WILL AFFECT THE REGION FOR THE NEXT SEVERAL HOURS. STAY TUNED TO NOAA WEATHER OR THE MEDIA FOR FURTHER UPDATES. .END/SITES
Local storm report, Jul 20, 12:26 AM EDT, 2 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OHIO
1228 PM EDT MON JUL 20 1998
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1115 PM NEWTOWN OH .75 INCH HAIL
07/19/98 HAMILTON
1121 PM OH 50 MPH TSTM GUST
07/19/98 CLINTON A 50 KTS WIND GUST AT NWS
ILN OFFICE TREES DOWN
ACROSS COUNTY AND
WILMINGTON
1123 PM OH .75 INCH HAIL
07/19/98 CLINTON DIME SIZE HAIL NEAR COWEN
LAKE
1145 PM OH WIND DAMAGE
07/19/98 HIGHLAND TREES AND POWER LINES DOWN
ACROSS COUNTY
1150 PM IN WIND DAMAGE
07/19/98 WAYNE TREES DOWN IN PERSHING
1155 PM IN WIND DAMAGE
07/19/98 UNION TREES AND POWER LINES DOWN
ACROSS THE COUNTY
1200 AM OH WIND DAMAGE
07/20/98 BROWN T TREES DOWN COUNTYWIDE
1215 AM PORTSMOUTH OH WIND DAMAGE
07/20/98 SCIOTO LARGE TREE LIMBS DOWNThe office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:03 PM EDT | Tornado Warning | ILN | Hardin | 47 min |
| Jul 19, 8:04 PM EDT | Severe Thunderstorm Warning | ILN | Logan, Shelby | 61 min |
| Jul 19, 8:04 PM EDT | Severe Thunderstorm Warning | ILN | Darke | 61 min |
| Jul 19, 8:14 PM EDT | Tornado Warning | ILN | Mercer | 36 min |
| Jul 19, 8:34 PM EDT | Tornado Warning | ILN | Shelby | 31 min |
| Jul 19, 8:38 PM EDT | Severe Thunderstorm Warning | ILN | Delaware, Union | 62 min |
| Jul 19, 8:44 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Miami | 61 min |
| Jul 19, 8:57 PM EDT | Severe Thunderstorm Warning | ILN | Darke, Mercer | 63 min |
| Jul 19, 9:08 PM EDT | Severe Thunderstorm Warning | ILN | Clark, Madison | 62 min |
| Jul 19, 9:08 PM EDT | Severe Thunderstorm Warning | ILN | Franklin | 62 min |
| Jul 19, 9:30 PM EDT | Severe Thunderstorm Warning | ILN | Licking | 60 min |
| Jul 19, 9:47 PM EDT | Severe Thunderstorm Warning | ILN | Miami, Montgomery | 63 min |
| Jul 19, 9:51 PM EDT | Severe Thunderstorm Warning | ILN | Greene | 64 min |
| Jul 19, 9:53 PM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Pickaway | 62 min |
| Jul 19, 9:55 PM EDT | Severe Thunderstorm Warning | ILN | Preble | 60 min |
| Jul 19, 10:13 PM EDT | Severe Thunderstorm Warning | ILN | Fayette | 62 min |
| Jul 19, 10:18 PM EDT | Severe Thunderstorm Warning | ILN | Butler, Hamilton | 62 min |
| Jul 19, 10:24 PM EDT | Severe Thunderstorm Warning | ILN | Madison | 46 min |
| Jul 19, 10:44 PM EDT | Severe Thunderstorm Warning | ILN | Clinton, Warren | 66 min |
| Jul 19, 10:57 PM EDT | Severe Thunderstorm Warning | ILN | Pickaway, Ross | 78 min |
| Jul 19, 11:03 PM EDT | Severe Thunderstorm Warning | ILN | Clermont | 77 min |
| Jul 19, 11:03 PM EDT | Severe Thunderstorm Warning | ILN | Brown | 82 min |
| Jul 19, 11:26 PM EDT | Severe Thunderstorm Warning | ILN | Highland | 64 min |
| Jul 19, 11:43 PM EDT | Severe Thunderstorm Warning | ILN | Adams, Pike | 72 min |
| Jul 20, 12:07 AM EDT | Severe Thunderstorm Warning | ILN | Scioto | 58 min |
| Jul 20, 1:15 AM EDT | Flash Flood Warning | ILN | Butler, Preble | 2 hr |
| Jul 20, 4:25 AM EDT | Flash Flood Warning | ILN | Butler | 2 hr |
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.