Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 106, NWS Shreveport, LA

April 21, 1997Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 21, 1997, 2:15 AM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 21, 1997, 2:15 AM CDT (07:15 UTC)
Expired: Apr 21, 1997, 2:45 AM CDT
In force: 30 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Bossier Parish, LA, Caddo Parish, LA

The radar

The Shreveport radar (KSHV), 22 km from the middle of the area, began a volume at 07:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 7.3 hours before the alert went out and 17 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: 1276 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1596 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 21, 2:15 AM CDT, 0 minutes earlier.

Area forecast discussion, Apr 21, 2:15 AM CDT, 0 minutes before

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In the hours before

Local storm report, Apr 21, 12:11 AM CDT, 2 hours 4 minutes before

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Local storm report, Apr 21, 12:12 AM CDT, 2 hours 3 minutes before

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Local storm report, Apr 21, 1:15 AM CDT, 1 hour before

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Local storm report, Apr 21, 1:17 AM CDT, 58 minutes before

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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 10:52 PM CDT	Severe Thunderstorm Warning	SHV	Red River	68 min
Apr 20, 11:22 PM CDT	Severe Thunderstorm Warning	SHV	Franklin	53 min
Apr 20, 11:47 PM CDT	Severe Thunderstorm Warning	SHV	Titus	28 min
Apr 21, 12:14 AM CDT	Severe Thunderstorm Warning	SHV	Morris	31 min
Apr 21, 12:48 AM CDT	Severe Thunderstorm Warning	SHV	Cass	57 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.