Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 227, NWS Shreveport, LA

May 30, 1997Angelina County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 30, 1997, 10:06 PM CDT for Angelina County, Texas. It was in force for 69 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: May 30, 1997, 10:06 PM CDT (03:06 UTC)
Expired: May 30, 1997, 11:15 PM CDT
In force: 69 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Angelina County, TX

The radar

The Shreveport radar (KSHV), 152 km from the middle of the area, began a volume at 03:08 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, 3.1 hours before the alert went out and 159 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, 9:09 PM CDT, 57 minutes earlier.

Area forecast discussion, May 30, 9:09 PM CDT, 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
905 PM CDT FRI MAY 30 1997

DOPPLER WEATHER RADAR AND SURFACE ANALYSIS INDICATED FRONT FROM
KTXK TO NEAR KTYR THIS PM. PRECIPITATION DROPPING OFF BEHIND THE
FRONT WITH DECREASING TREND AHEAD OF THE FRONT OVER PARTS OF
E TX AND NW LA. SHOWERS AND THUNDERSTORMS CONTINUING OVER SW AR ZONES
...SOUTHERN SECTIONS OF NE TX ZONES...WITH DEVELOPING ACTIVITY
OVER PARTS OF NE LA SW INTO W CENTRAL LA. WILL SUGGEST A REGROUPING
OF N LA ZONES TO REFLECT CURRENT TREND IN THUNDERSTORMS AS WELL AS
THE NORTHERN SECTIONS OF NE TX ZONES.

SIX

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:20 PM CDT	Severe Thunderstorm Warning	SHV	Smith	55 min
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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.