Alert archive / Indiana / Tornado Warnings in 1991

Tornado Warning 9, NWS Indianapolis, IN

May 17, 1991Madison County, Indiana

NWS Indianapolis, IN issued this tornado warning at May 17, 1991, 5:30 PM EST for Madison County, Indiana. It was in force for 45 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: May 17, 1991, 5:30 PM EST (22:30 UTC)
Expired: May 17, 1991, 6:15 PM EST
In force: 45 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Madison County, IN

What was reported inside it

Time	Report	Where	Remark
May 17, 5:40 PM EST	Thunderstorm Wind 55	Madison, 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

Dayton/James M C, OH (KDAY), launched 12:00Z, 10.5 hours before the alert went out and 133 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: 48 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 128 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 172230
TORIND
INC095-172315-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
530 PM EST FRI MAY 17 1991
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  615 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN CENTRAL INDIANA
 
   ...MADISON COUNTY
 
AT 525 PM EST RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING A TORNADO WAS ABOUT 25 MILES NORTH NORTHEAST OF
INDIANAPOLIS JUST EAST OF ARCADIA.
 
THIS STORM HAS PRODUCED WINDS OVER 75 MILES AN HOUR AND WILL PRODUCE
VERY DAMAGING WINDS AS IT MOVES TOWARDS ANDERSON.
 
PEOPLE IN ANDERSON SHOULD MOVE TO AN INSIDE SHELTER IMMEDIATELY.
 
IF YOU LIVE IN }A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO
A BASEMENT IF ONE IS AVAILABLE.  AVOID WINDOWS AND PROTECT YOUR
BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.
EDWARDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 2:40 PM EST	Severe Thunderstorm Warning	IND	Benton, Warren	50 min
May 17, 3:26 PM EST	Severe Thunderstorm Warning	IND	Fountain	34 min
May 17, 3:37 PM EST	Severe Thunderstorm Warning	IND	Montgomery, Tippecanoe	53 min
May 17, 4:25 PM EST	Severe Thunderstorm Warning	IND	Boone	50 min
May 17, 4:51 PM EST	Tornado Warning	IND	Hamilton	39 min
May 17, 4:56 PM EST	Severe Thunderstorm Warning	IND	Marion	34 min
May 17, 5:09 PM EST	Tornado Warning	IND	Montgomery	36 min
May 17, 6:02 PM EST	Severe Thunderstorm Warning	IND	Henry	28 min
May 17, 6:18 PM EST	Severe Thunderstorm Warning	IND	Wayne	42 min

Nearby

Tornado Warnings in Indiana, 1991 Every tornado warning in 1991 Tornadoes in 1991

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.