Alert archive / Indiana / Tornado Warnings in 1991

Tornado Warning 8, NWS Indianapolis, IN

May 17, 1991Montgomery County, Indiana

NWS Indianapolis, IN issued this tornado warning at May 17, 1991, 5:09 PM EST for Montgomery County, Indiana. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
May 17, 1991, 5:09 PM EST (22:09 UTC)
Expired
May 17, 1991, 5:45 PM EST
In force
36 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Montgomery County, IN

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 12:00Z, 10.2 hours before the alert went out and 230 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, Dayton/James M C, OH at 12:00Z on 1991-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 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, Dayton/James M C, OH at 12:00Z on 1991-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
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 172209
TORIND
INC107-172245-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
509 PM EST FRI MAY 17 1991
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  545 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN WEST CENTRAL INDIANA
 
   ...NORTHERN AND CENTRAL MONTGOMERY COUNTY
 
AT 505 PM EST WEATHER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING A TORNADO WAS ABOUT 5 MILES WEST NORTHWEST OF CRAWFORDSVILLE.
 
THIS STORM WILL MOVE EAST AND PASS VERY CLOSE TO CRAWFORDSVILLE BETWEEN
510 PM AND 530 PM EST.
 
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING O]N 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.

IssuedProductOfficeCountiesLasted
May 17, 2:40 PM ESTSevere Thunderstorm WarningINDBenton, Warren50 min
May 17, 3:26 PM ESTSevere Thunderstorm WarningINDFountain34 min
May 17, 3:37 PM ESTSevere Thunderstorm WarningINDMontgomery, Tippecanoe53 min
May 17, 4:25 PM ESTSevere Thunderstorm WarningINDBoone50 min
May 17, 4:51 PM ESTTornado WarningINDHamilton39 min
May 17, 4:56 PM ESTSevere Thunderstorm WarningINDMarion34 min
May 17, 5:30 PM ESTTornado WarningINDMadison45 min
May 17, 6:02 PM ESTSevere Thunderstorm WarningINDHenry28 min
May 17, 6:18 PM ESTSevere Thunderstorm WarningINDWayne42 min

Nearby

Tornado Warnings in Indiana, 1991Every tornado warning in 1991Tornadoes 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; the sounding from the Mesonet's radiosonde archive.