Alert archive / Indiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 3, NWS Indianapolis, IN

March 21, 1991Spencer County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Mar 21, 1991, 7:00 PM CST for Spencer County, Indiana. It was in force for 30 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: Mar 21, 1991, 7:00 PM CST (01:00 UTC)
Expired: Mar 21, 1991, 7:30 PM CST
In force: 30 min
Issued by: NWS Indianapolis, IN
Area: Whole counties

County Spencer County, IN

What was reported inside it

Time	Report	Where	Remark
Mar 21, 7:05 PM CST	Hail 1.75	Spencer, 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, 1.0 hours before the alert went out and 182 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: 1048 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1086 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Mar 21, 5:24 PM CST, 1 hour 36 minutes before

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Special weather statement, Mar 21, 6:27 PM CST, 33 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 6:51 PM CST	Severe Thunderstorm Warning	IND	Warrick	39 min
Mar 21, 7:34 PM CST	Severe Thunderstorm Warning	IND	Perry	26 min
Mar 21, 9:57 PM CST	Severe Thunderstorm Warning	IND	Posey, Vanderburgh	33 min
Mar 21, 9:31 PM CST	Severe Thunderstorm Warning	IND	Union	29 min
Mar 22, 1:11 AM CST	Severe Thunderstorm Warning	IND	Grayson, Ohio	34 min
Mar 22, 3:26 AM CST	Severe Thunderstorm Warning	IND	Allen, Barren	34 min
Mar 22, 10:14 AM CST	Severe Thunderstorm Warning	IND	Christian	31 min
Mar 22, 10:37 AM CST	Severe Thunderstorm Warning	IND	Muhlenberg, Todd	33 min
Mar 22, 11:16 AM CST	Severe Thunderstorm Warning	IND	Union	29 min
Mar 22, 11:47 AM CST	Flash Flood Warning	IND	Union	28 min
Mar 22, 11:47 AM CST	Flash Flood Warning	IND	Henderson	58 min
Mar 22, 11:47 AM CST	Severe Thunderstorm Warning	IND	Henderson, Union	58 min
Mar 22, 12:47 PM CST	Flash Flood Warning	IND	Henderson, Union	118 min
Mar 22, 4:54 PM CST	Flash Flood Warning	IND	Daviess, McLean	2 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 1991 Every severe thunderstorm warning 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.