Alert archive / Texas / Tornado Warnings in 1997

Tornado Warning 34, NWS Shreveport, LA

October 23, 1997San Augustine County, Texas

NWS Shreveport, LA issued this tornado warning at Oct 23, 1997, 11:48 PM CDT for San Augustine County, Texas. It was in force for 27 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: Oct 23, 1997, 11:48 PM CDT (04:48 UTC)
Expired: Oct 24, 1997, 12:15 AM CDT
In force: 27 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County San Augustine County, TX

The radar

The Ft Polk radar (KPOE), 116 km from the middle of the area, began a volume at 04:48 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
Oct 24, 12:05 AM CDT	Thunderstorm Wind 60	San Augustine, TX	Several trees down along Fm1.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 23, 8:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 4.8 hours before the alert went out and 127 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 239 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.

302 
WFUS1 KSHV 240449 RRA
TORSHV
TXC405-240515-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1148 PM CDT THU OCT 23 1997
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1215 AM CDT
FOR THE FOLLOWING AREA...
 
IN EAST TEXAS
 
   ...SAN AUGUSTINE COUNTY
 
AT 1147 PM...DOPPLER RADAR STRONGLY INDICATED A TORNADO ON THE
NACOGDOCHES-SAN AUGUSTINE COUNTY LINE...5 MILES SOUTHWEST OF DENNING
MOVING EAST NEAR 30 MPH. THE TORNADO WILL PASS JUST SOUTH OF DENNING AND
THEN ACROSS TEXAS 147 SOUTH OF SAN AUGUSTINE.
 
IF YOU ARE IN A MOBILE HOME...GO TO A STORM SHELTER IF AVAILABLE.
IF A STORM SHELTER IS NOT AVAILABLE...SEEK SHELTER IN A DITCH OR LOW
SPOT.
 
4/5

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 7:50 PM CDT	Tornado Warning	SHV	Shelby	40 min
Oct 23, 7:50 PM CDT	Tornado Warning	SHV	Sabine	40 min
Oct 23, 8:00 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	45 min
Oct 23, 8:54 PM CDT	Severe Thunderstorm Warning	SHV	Nacogdoches, Rusk	51 min
Oct 23, 9:42 PM CDT	Severe Thunderstorm Warning	SHV	Shelby	48 min
Oct 23, 10:21 PM CDT	Flash Flood Warning	SHV	Shelby	2 hr
Oct 23, 10:23 PM CDT	Severe Thunderstorm Warning	SHV	Nacogdoches	52 min
Oct 24, 1:36 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	39 min

Nearby

Tornado Warnings in Texas, 1997 Every tornado warning in 1997 Tornadoes 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.