Alert archive / Indiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 80, NWS Indianapolis, IN

June 18, 1998Clay County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jun 18, 1998, 10:37 PM EST for Clay County, Indiana. It was in force for 33 min. 1 report 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
Jun 18, 1998, 10:37 PM EST (03:37 UTC)
Expired
Jun 18, 1998, 11:10 PM EST
In force
33 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Clay County, IN

The radar

The Indianapolis radar (KIND), 80 km from the middle of the area, began a volume at 03:39 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

TimeReportWhereRemark
Jun 18, 10:40 PM ESTThunderstorm WindBrazil, INTrees blown down.

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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.6 hours before the alert went out and 152 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, Lincoln, IL at 00:00Z on 1998-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2675 joules per kilogram.LCLLFCEL10008507005003002001001 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, Lincoln, IL at 00:00Z on 1998-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 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
2675 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1092 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
1.7
Supercell composite
17.5

Open this sounding in Storm Lab

The text

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

859 
WUUS1 KIND 190338 RRA
SVRIND
INC021-190410-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1037 PM EST THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN WEST CENTRAL INDIANA

* UNTIL 1110 PM EST

* AT 1036 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTHEAST OF TERRE HAUTE... MOVING
  EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRAZIL AROUND 1050 PM
  CLAY CITY AROUND 1050 PM
  STAUNTON AROUND 1045 PM

DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

LASHLEY/EDDY

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 10:07 PM ESTSevere Thunderstorm WarningINDCarroll, Tippecanoe48 min
Jun 18, 10:16 PM ESTSevere Thunderstorm WarningINDParke, Vermillion, Vigo49 min
Jun 18, 10:48 PM ESTSevere Thunderstorm WarningINDMontgomery, Putnam47 min
Jun 18, 11:15 PM ESTSevere Thunderstorm WarningINDHendricks, Morgan45 min
Jun 18, 11:36 PM ESTSevere Thunderstorm WarningINDHamilton, Johnson, Marion49 min
Jun 18, 11:49 PM ESTSevere Thunderstorm WarningINDHancock, Shelby31 min
Jun 18, 11:53 PM ESTSevere Thunderstorm WarningINDMadison32 min
Jun 18, 11:56 PM ESTSevere Thunderstorm WarningINDGreene, Monroe34 min
Jun 19, 12:01 AM ESTSevere Thunderstorm WarningINDBrown34 min
Jun 19, 12:09 AM ESTSevere Thunderstorm WarningINDDecatur, Henry, Rush46 min
Jun 19, 12:09 AM ESTSevere Thunderstorm WarningINDDelaware46 min
Jun 19, 12:09 AM ESTSevere Thunderstorm WarningINDBartholomew46 min
Jun 19, 12:25 AM ESTSevere Thunderstorm WarningINDKnox, Sullivan35 min
Jun 19, 12:34 AM ESTSevere Thunderstorm WarningINDRandolph31 min
Jun 19, 1:08 AM ESTSevere Thunderstorm WarningINDOwen, Putnam32 min
Jun 19, 1:19 AM ESTSevere Thunderstorm WarningINDHendricks, Monroe, Morgan31 min
Jun 19, 1:23 AM ESTSevere Thunderstorm WarningINDLawrence32 min

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.