Alert archive / Illinois / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 16, NWS Indianapolis, IN

April 20, 1995Gallatin County, Illinois

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 20, 1995, 3:30 PM CDT for Gallatin County, Illinois. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Apr 20, 1995, 3:30 PM CDT (20:30 UTC)
Expired
Apr 20, 1995, 4:00 PM CDT
In force
30 min
Issued by
NWS Indianapolis, IN
Area
Whole counties

County Gallatin County, IL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.5 hours before the alert went out and 232 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, Nashville Metro, TN at 12:00Z on 1995-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Nashville Metro, TN at 12:00Z on 1995-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 188 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
188 m²/s²
0-3 km storm-relative helicity
107 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 KEVV 202030
SVREVV
ILC059-202100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EVANSVILLE IN
330 PM CDT THU APR 20 1995
 
THE NATIONAL WEATHER SERVICE IN EVANSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST ILLINOIS
 
   ...GALLATIN COUNTY
 
AT 328 PM CDT...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
40 MILES SOUTHWEST OF EVANSVILLE AND OVER JUNCTION ILLINOIS. THIS
SEVERE THUNDERSTORM WAS MOVING NORTHEAST AT 45 MILES AN HOUR.
PERSONS IN THE VICINITY OF THIS THUNDERSTORM SHOULD SEEK SHELTER
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.
 
ZIMMER

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, Apr 20, 2:51 PM CDT, 39 minutes before
INZ001>092-202100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
250 PM EST THU APR 20 1994

IN INDIANA A TORNADO WATCH IS IN EFFECT UNTIL 9 PM EST AND INCLUDES
THAT PART OF INDIANA SOUTH OF A LINE FROM 10 MILES NORTH OF TERRE
HAUTE TO 35 MILES NORTHEAST OF COLUMBUS...AND WEST OF A LINE FROM
35 MILES NORTHEAST OF COLUMBUS TO 10 MILES EAST OF MADISON.

SOME CITIES INCLUDED ARE TERRE HAUTE...BLOOMINGTON...COLUMBUS...
BEDFORD...SEYMOUR...VINCENNES...MADISON...JASPER AND EVANSVILLE.

REMEMBER...A WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE
WEATHER IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD
BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

ZIMMERMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 4:09 PM CDTSevere Thunderstorm WarningINDGallatin31 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1995Every severe thunderstorm warning in 1995

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.