Alert archive / Indiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 5, NWS Wilmington, OH
NWS Wilmington, OH issued this severe thunderstorm warning at Apr 8, 1998, 1:39 AM EDT for Dearborn County, Ohio County, Indiana. It was in force for 61 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 8, 1998, 1:39 AM EDT (05:39 UTC)
- Expired
- Apr 8, 1998, 2:40 AM EDT
- In force
- 61 min
- Issued by
- NWS Wilmington, OH
- Area
- Whole counties
Counties Dearborn County, IN, Ohio County, IN
The radar
The Cincinnati radar (KILN), 107 km from the middle of the area, began a volume at 05:41 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 2:00 AM EDT | Hail 0.75 | Dillsboro, IN | |
| Apr 8, 2:30 AM EDT | Hail 1 | Rising Sun, IN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 7, 8:00 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 7, 11:00 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.7 hours before the alert went out and 109 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.
298 WUUS01 KILN 080540 RRA SVRILN INC029-115-080640- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WILMINGTON OH 139 AM EDT WED APR 8 1998 THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 240 AM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEASTERN INDIANA ...DEARBORN COUNTY ...OHIO COUNTY AT 1235 AM EST (135 AM EDT) WEATHER SERVICE DOPPLER RADAR WAS SHOWING A SEVERE THUNDERSTORM IN NORTHWEST SWITZERLAND COUNTY NEAR PLEASANT. THIS STORM WAS MOVING TO THE EAST-NORTHEAST AT 35 MPH AND WILL MOVE ACROSS OHIO AND SOUTHERN DEARBORN COUNTIES. SOME TOWNS IN THE PATH OF THIS STORM INCLUDE FARMERS RETREAT... MILTON... AND HARTFORD. LARGE HAIL IS THE PRIMARY THREAT FROM THIS STORM. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING CONDITIONS. STAY INDOORS AWAY FROM WINDOWS AS THIS STORM MOVES OVERHEAD. RANDALL
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Apr 7, 9:00 PM EDT, 4 hours 39 minutes earlier.
Area forecast discussion, Apr 7, 9:00 PM EDT, 4 hours 39 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, 8:00 PM EDT, 5 hours 39 minutes before
INZ050-058-059-066-073>075-080600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILMINGTON OH 800 PM EDT (700 PM EST) TUE APR 7 1998 ...TORNADO WATCH IN EFFECT FOR EAST CENTRAL AND SOUTHEAST INDIANA UNTIL 2 AM EDT (1 AM EST)... A WARM FRONT WHICH EXTENDS FROM CENTRAL ILLINOIS THROUGH CENTRAL INDIANA INTO 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 SEVERE THUNDERSTORMS WERE BEGINNING TO DEVELOP OVER CENTRAL INDIANA. THE THREAT FOR SEVERE THUNDERSTORMS WHICH MAY PRODUCE TORNADOES IS EXPECTED TO SPREAD EAST ALONG AND JUST NORTH OF THE WARM FRONT INTO EASTERN CENTRAL AND SOUTHEAST INDIANA THIS EVENING. THE FOLLOWING COUNTIES ARE IN A TORNADO WATCH UNTIL 2 AM EDT (1 AM EST): WAYNE...FAYETTE...UNION...FRANKLIN...RIPLEY...DEARBORN AND OHIO. 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 7, 10:53 PM EDT, 2 hours 46 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
The office that day
Everything else NWS Wilmington, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 2:11 AM EDT | Severe Thunderstorm Warning | ILN | Switzerland | 44 min |
| Apr 8, 2:32 AM EDT | Flash Flood Warning | ILN | Dearborn | 118 min |
| Apr 8, 2:36 AM EDT | Flash Flood Warning | ILN | Ohio | 3 hr |
Nearby
Severe Thunderstorm Warnings in Indiana, 1998Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.