Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 222, NWS Shreveport, LA

May 30, 1997Smith County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 30, 1997, 7:20 PM CDT for Smith County, Texas. It was in force for 55 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: May 30, 1997, 7:20 PM CDT (00:20 UTC)
Expired: May 30, 1997, 8:15 PM CDT
In force: 55 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Smith County, TX

The radar

The Shreveport radar (KSHV), 134 km from the middle of the area, began a volume at 00:24 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.

What was reported inside it

Time	Report	Where	Remark
May 30, 8:10 PM CDT	Thunderstorm Wind 60	Flint, TX	Numerous trees toppled across the area.

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

Shreveport, LA (KSHV), launched 00:00Z, 0.3 hours before the alert went out and 143 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: 2099 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 30, 2:28 PM CDT, 4 hours 52 minutes earlier.

Area forecast discussion, May 30, 2:28 PM CDT, 4 hours 52 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
May 30, 8:07 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	68 min
May 30, 9:05 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches	55 min
May 30, 10:06 PM CDT	Severe Thunderstorm Warning	SHV	Angelina	69 min
May 30, 8:34 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches	56 min
May 30, 9:44 PM CDT	Flash Flood Warning	SHV	Union	3 hr
May 30, 8:46 PM CDT	Severe Thunderstorm Warning	SHV	Columbia	59 min
May 30, 9:15 PM CDT	Flash Flood Warning	SHV	Union	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.