Alert archive / Indiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 113, NWS Indianapolis, IN

August 20, 1990Randolph County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 20, 1990, 6:56 PM EST for Randolph County, Indiana. It was in force for 64 min.

The area

The counties it named.

The facts

Issued: Aug 20, 1990, 6:56 PM EST (23:56 UTC)
Expired: Aug 20, 1990, 8:00 PM EST
In force: 64 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Randolph County, IN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 12:00Z, 11.9 hours before the alert went out and 75 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: 238 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 88 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.

000 
TTAA00 KIND 202358
SVRIND
INC135-210100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
656 PM EST MON AUG 20 1990
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN EAST CENTRAL INDIANA
          ...RANDOLPH
 
STATE POLICE RELAYED A REPORT FROM THE COUNTY SHERIFF OF BASEBALL
SIZED HAIL IN THE LOSANTVILLE AREA...ABOUT 20 MILES NORTHWEST OF
RICHMOND. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR TOWARD
THE TOWNS OF HUNTSVILLE AND WINCHESTER. IT WILL APPROACH WINCHESTER BY
710 PM EST. FUNNEL CLOUDS WERE ALSO SITED WITH THIS STORM.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
THUNDERSTORMS OCCASIONALLY DO PRODUCE TORNADOS...SO ACT QUICKLY.
 
MPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 8:02 PM EST	Severe Thunderstorm Warning	IND	Delaware, Henry	28 min
Aug 19, 8:29 PM EST	Severe Thunderstorm Warning	IND	Henry	31 min
Aug 19, 8:50 PM EST	Flash Flood Warning	IND	Hancock	3 hr
Aug 19, 9:16 PM EST	Severe Thunderstorm Warning	IND	Fayette	44 min
Aug 20, 1:59 PM EST	Severe Thunderstorm Warning	IND	Hancock, Shelby	31 min
Aug 20, 2:26 PM EST	Severe Thunderstorm Warning	IND	Madison, Tipton	34 min
Aug 20, 2:36 PM EST	Severe Thunderstorm Warning	IND	Henry, Rush	39 min
Aug 20, 3:38 PM EST	Flash Flood Warning	IND	Madison	82 min
Aug 20, 3:46 PM EST	Flash Flood Warning	IND	Howard	3 hr
Aug 20, 5:31 PM EST	Tornado Warning	IND	Warrick	29 min

Nearby

Severe Thunderstorm Warnings in Indiana, 1990 Every severe thunderstorm warning in 1990

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.