Alert archive / Indiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 60, NWS Indianapolis, IN

July 21, 1997Brown County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 21, 1997, 4:49 PM EST for Brown County, Indiana. It was in force for 41 min. 3 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
Jul 21, 1997, 4:49 PM EST (21:49 UTC)
Expired
Jul 21, 1997, 5:30 PM EST
In force
41 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Brown County, IN

What was reported inside it

TimeReportWhereRemark
Jul 21, 5:00 PM ESTThunderstorm WindNashville, INThunderstorm winds blew a few trees down in Belmont.
Jul 21, 5:00 PM ESTThunderstorm WindNashville, INThunderstorm winds blew down trees in Trevelac.
Jul 21, 5:10 PM ESTThunderstorm WindNashville, INThunderstorm winds blew down trees and power lines.

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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.8 hours before the alert went out and 210 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, Cncnati-Daytn, OH at 12:00Z on 1997-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Cncnati-Daytn, OH at 12:00Z on 1997-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1556 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
65 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 212149 RRA
SVRIND
INC013-212230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
449 PM EST MON JUL 21 1997
 
THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL INDIANA
 
   ...BROWN COUNTY
 
AT 440 PM EST...RADAR SHOWED A SEVERE THUNDERSTORM 10 MILES NORTHEAST OF
BLOOMINGTON. THE STORM WAS MOVING EAST 20 MPH AND SHOULD BE NEAR
NASHVILLE BETWEEN 500 AND 515 PM. THE STORM WILL HAVE LARGE
HAIL...DANGEROUS LIGHTNING AND HEAVY RAINFALL.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 21, 4:27 PM EST, 22 minutes before
INZ051-052-060-061-067-068-212230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
427 PM EST MON JUL 21 1997

...THUNDERSTORMS WERE ALONG THE WABASH RIVER IN SOUTHWEST INDIANA...

AT 420 PM...AN AREA OF THUNDERSTORMS WAS ALONG THE WABASH RIVER FROM
SOUTH OF TERRE HAUTE TO SOUTH OF VINCENNES. THE STORMS WERE MOVING
EAST AT 30 MPH. THEY WILL CONTAIN DANGEROUS LIGHTNING...BRIEF HEAVY
RAINFALL AND WINDS GUSTING TO 45 MPH. HAIL IS POSSIBLE.

STORMS SHOULD BE FROM AROUND LINTON TO WASHINGTON NEAR 515 PM.

DS
Special weather statement, Jul 21, 4:28 PM EST, 21 minutes before
INZ051-052-060-061-067-068-212230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
427 PM EST MON JUL 21 1997

...THUNDERSTORMS WERE ALONG THE WABASH RIVER IN SOUTHWEST INDIANA...

AT 420 PM...AN AREA OF THUNDERSTORMS WAS ALONG THE WABASH RIVER FROM
SOUTH OF TERRE HAUTE TO SOUTH OF VINCENNES. THE STORMS WERE MOVING
EAST AT 30 MPH. THEY WILL CONTAIN DANGEROUS LIGHTNING...BRIEF HEAVY
RAINFALL AND WINDS GUSTING TO 45 MPH. HAIL IS POSSIBLE.

STORMS SHOULD BE FROM AROUND LINTON TO WASHINGTON NEAR 515 PM.

DS
Special weather statement, Jul 21, 4:45 PM EST, 4 minutes before
INZ055-062>064-071-212245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
445 PM EST MON JUL 21 1997

...THUNDERSTORMS WERE OVER SOUTH CENTRAL INDIANA...

AT 440 PM...AN AREA OF THUNDERSTORMS WAS 10 MILES NORTHEAST OF
BLOOMINGTON. THE STORMS WERE MOVING EAST 20 MPH AND WILL NEAR
NASHVILLE BETWEEN 500 AND 515 PM. THE STORMS WILL HAVE DANGEROUS
LIGHTNING AND HEAVY RAINFALL. SOME HAIL AND GUSTY WINDS ARE LIKELY.

DS
Special weather statement, Jul 21, 4:46 PM EST, 3 minutes before
INZ055-062>064-071-212245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
445 PM EST MON JUL 21 1997

...THUNDERSTORMS WERE OVER SOUTH CENTRAL INDIANA...

AT 440 PM...AN AREA OF THUNDERSTORMS WAS 10 MILES NORTHEAST OF
BLOOMINGTON. THE STORMS WERE MOVING EAST 20 MPH AND WILL NEAR
NASHVILLE BETWEEN 500 AND 515 PM. THE STORMS WILL HAVE DANGEROUS
LIGHTNING AND HEAVY RAINFALL. SOME HAIL AND GUSTY WINDS ARE LIKELY.

DS

Nearby

Severe Thunderstorm Warnings in Indiana, 1997Every severe thunderstorm warning in 1997

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.