Alert archive / Indiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 13, NWS Indianapolis, IN

May 9, 1990Sullivan County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at May 9, 1990, 9:27 PM EST for Sullivan County, Indiana. It was in force for 48 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: May 9, 1990, 9:27 PM EST (02:27 UTC)
Expired: May 9, 1990, 10:15 PM EST
In force: 48 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Sullivan County, IN

The radar

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

What was reported inside it

Time	Report	Where	Remark
May 9, 9:30 PM EST	Thunderstorm Wind 0	Sullivan, IN
May 9, 9:50 PM EST	Thunderstorm Wind 0	Sullivan, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.5 hours before the alert went out and 251 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: 602 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KIND 100231
SVRIND
INC153-100315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
927 PM EST WED MAY 9 1990
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST INDIANA
          ...SULLIVAN
 
AT 926 PM EST...NATIONAL WEATHER SERVICE RADAR SHOWED A SEVERE
THUNDERSTORM ABOUT 40 MILES SOUTH SOUTHWEST OF TERRE HAUTE MOVING
TOWARD SULLIVAN AND CARLISLE. THE STORM WILL REACH THOSE COMMUNITIES
BETWEEN 945 AND 10 PM EST. PEOPLE IN THE PATH OF THESE STORMS SHOULD
MOVE TO THE INTERIOR OF THEIR RESIDENCES AND TO THE LOWEST FLOOR
POSSIBLE IMMEDIATELY.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
MPD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 9:10 PM EST	Severe Thunderstorm Warning	IND	Gibson	50 min
May 9, 9:28 PM EST	Severe Thunderstorm Warning	IND	Daviess, Knox	47 min
May 9, 9:45 PM EST	Severe Thunderstorm Warning	IND	Clay, Greene	45 min
May 9, 10:04 PM EST	Severe Thunderstorm Warning	IND	Monroe, Owen	26 min
May 9, 10:18 PM EST	Severe Thunderstorm Warning	IND	Hendricks, Morgan	27 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.