Alert archive / Indiana / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 178

April 8, 199830 counties in Indiana; Boone County, Campbell County, Kenton County, Kentucky; 22 counties in Ohio

The Storm Prediction Center issued this severe thunderstorm watch at Apr 8, 1998, 1:00 AM EST for 30 counties in Indiana; Boone County, Campbell County, Kenton County, Kentucky; 22 counties in Ohio. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 8, 1998, 1:00 AM EST (06:00 UTC)
Expired
Apr 8, 1998, 5:00 AM EST
In force
4 hr
Issued by
the Storm Prediction Center
All 55 counties

Adams County, IN, Bartholomew County, IN, Blackford County, IN, Brown County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Howard County, IN, Jay County, IN, Jennings County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Ohio County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Adams County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Fayette County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Indianapolis radar (KIND), 109 km from the middle of the area, began a volume at 06:04 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.

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 8, 1:00 AM ESTSevere Thunderstorm WarningIWXAdams35 min
Apr 8, 1:17 AM ESTSevere Thunderstorm WarningILNBoone33 min
Apr 8, 1:27 AM ESTSevere Thunderstorm WarningILNHamilton43 min
Apr 8, 1:32 AM ESTFlash Flood WarningILNDearborn118 min
Apr 8, 1:36 AM ESTFlash Flood WarningILNOhio3 hr
Apr 8, 1:40 AM ESTTornado WarningILNBoone50 min
Apr 8, 1:53 AM ESTSevere Thunderstorm WarningILNClermont47 min
Apr 8, 2:05 AM ESTSevere Thunderstorm WarningILNCampbell, Kenton45 min
Apr 8, 2:17 AM ESTSevere Thunderstorm WarningILNHamilton63 min
Apr 8, 2:29 AM ESTSevere Thunderstorm WarningILNClinton, Highland31 min
Apr 8, 2:29 AM ESTTornado WarningILNClinton, Highland31 min
Apr 8, 2:37 AM ESTFlash Flood WarningILNCampbell, Kenton118 min
Apr 8, 2:51 AM ESTFlash Flood WarningILNClermont, Hamilton3 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.0 hours before the alert went out and 127 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 1998-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 1998-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 385 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 7, 7:00 PM ESTTornado WatchSPCBartholomew, Benton, Blackford, Boone, Brown, Carroll and 44 more6 hr
Apr 7, 10:00 PM ESTTornado WatchSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 23 more6 hr
Apr 8, 2:00 AM ESTTornado WatchSPCClark, Jefferson, Switzerland6 hr
Apr 8, 12:15 PM ESTTornado WatchSPCClark, Crawford, Dearborn, Decatur, Fayette, Floyd and 12 more6 hr
Apr 8, 5:00 AM ESTSevere Thunderstorm WatchSPCBell, Breathitt, Clay, Estill, Floyd, Harlan and 12 more5 hr
Apr 8, 5:30 PM ESTTornado WatchSPCAllen, Breckinridge, Butler, Caldwell, Calloway, Carlisle and 29 more7 hr

Nearby

Severe Thunderstorm Watches in Indiana, 1998Severe Thunderstorm Watches in Ohio, 1998Severe Thunderstorm Watches in Kentucky, 1998Every severe thunderstorm watch 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.