Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 8, NWS Wilmington, OH

April 8, 1998Hamilton County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Apr 8, 1998, 2:27 AM EDT for Hamilton County, Ohio. It was in force for 43 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 8, 1998, 2:27 AM EDT (06:27 UTC)
Expired: Apr 8, 1998, 3:10 AM EDT
In force: 43 min
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 06:28 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 8, 2:00 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.5 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

530 
WUUS01 KILN 080628 RRA
SVRILN
OHC061-080710-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
227 AM EDT WED APR 8 1998

THE NATIONAL WEATHER SERVICE IN WILMINGTON OH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 310 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN OHIO

   ...HAMILTON COUNTY
 
AT 225 PM EDT A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHERN
BOONE COUNTY NEAR VILLA HILLS. THIS STORM WAS MOVING TO THE
EAST-NORTHEAST AT 35 MPH AND WILL TRACK ACROSS CINCINNATI AND
THE EASTERN PORTION OF HAMILTON COUNTY. DAMAGING WINDS ARE THE 
MAIN THREAT FROM THIS STORM. THIS STORM PRODUCED WIND GUSTS TO 60
MPH AT THE CINCINNATI-NORTHERN KENTUCKY INTERNATIONAL AIRPORT.
 
IF YOU ARE IN THE PATH OF THIS STORM...MOVE INSIDE A STRONG
BUILDING. STAY AWAY FROM WINDOWS SINCE THEY CAN EASILY SHATTER IN
SEVERE THUNDERSTORM WINDS. DO NOT USE TELEPHONES OR APPLIANCES
UNLESS ABSOLUTELY NECESSARY UNTIL THIS STORM HAS PASSED.

&
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, 5 hours 27 minutes earlier.

Area forecast discussion, Apr 7, 9:00 PM EDT, 5 hours 27 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 34 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, 44 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, 44 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, 2:53 AM EDT	Severe Thunderstorm Warning	ILN	Clermont	47 min
Apr 8, 3:17 AM EDT	Severe Thunderstorm Warning	ILN	Hamilton	63 min
Apr 8, 3:29 AM EDT	Severe Thunderstorm Warning	ILN	Clinton, Highland	31 min
Apr 8, 3:29 AM EDT	Tornado Warning	ILN	Clinton, Highland	31 min
Apr 8, 3:51 AM EDT	Flash Flood Warning	ILN	Clermont, Hamilton	3 hr
Apr 8, 4:26 AM EDT	Severe Thunderstorm Warning	ILN	Ross	59 min
Apr 8, 1:55 PM EDT	Severe Thunderstorm Warning	ILN	Franklin	50 min
Apr 8, 2:10 PM EDT	Severe Thunderstorm Warning	ILN	Delaware	50 min
Apr 8, 2:29 PM EDT	Severe Thunderstorm Warning	ILN	Licking	41 min
Apr 8, 4:33 PM EDT	Severe Thunderstorm Warning	ILN	Scioto	62 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1998 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.