Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 355, NWS Shreveport, LA

October 23, 1997Nacogdoches County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Oct 23, 1997, 10:23 PM CDT for Nacogdoches County, Texas. It was in force for 52 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: Oct 23, 1997, 10:23 PM CDT (03:23 UTC)
Expired: Oct 23, 1997, 11:15 PM CDT
In force: 52 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Nacogdoches County, TX

The radar

The Shreveport radar (KSHV), 118 km from the middle of the area, began a volume at 03:25 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 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, 3.4 hours before the alert went out and 126 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.

000 
TTAA00 KSHV 240323 RRA
SVRSHV
TXC347-240415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1023 PM CDT THU OCT 23 1997
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM CDT
FOR THE FOLLOWING AREA...
 
IN EAST TEXAS
 
   ...NACOGDOCHES COUNTY
 
AT 1022 PM...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST
OF NACOGDOCHES MOVING EAST NEAR 20 MPH. DAMAGING HAIL UP TO GOLFBALL
SIZE IS POSSIBLE WITH THIS STORM.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.
 
4/5

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 Oct 23, 8:26 PM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Oct 23, 8:26 PM CDT, 1 hour 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
825 PM CDT THU OCT 23 1997

WITH DRY AIR BEGINNING TO MOVE INTO PARTS OF NORTH TEXAS WILL NEED TO
DROP FFA FOR PARTS OF E TX FOR THE REST OF TONIGHT. RAIN COOLED AIR
OVER PARTS OF SRN AR AND NRN LA SHUD SPELL AN END TO CHC SVR N OF A
LINE FROM MANSFIELD LA TO COLUMBIA LA. WILL NEED TO LOOK AT REDUCING
POPS ACRS EXTREME NE TX AS WELL WITH MOST ACTIVITY SHIFTING TO THE S
OF THIS AREA. WILL ALSO NEED TO LOOK AT TRIMMING POPS A LITTLE FOR
EXTREME SW AR. FOR OTHER LOCATIONS WILL NEED TO KEEP POPS UP BUT REDUCE
LATE.

18

In the hours before

Local storm report, Oct 23, 5:08 PM CDT, 5 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
508 PM CDT THU OCT 23 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0448 PM    BULLARD                   TX   1.75 INCH HAIL
10/23/97   SMITH                          ALSO REPORTED NEAR FLINT.

18

Local storm report, Oct 23, 7:15 PM CDT, 3 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
715 PM CDT THU OCT 23 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0545 PM    10 W RUSK                 TX   1.5 INCH HAIL
10/23/97   CHEROKEE

0628 PM    POLLOK                    TX   NON QUALIFIED EVENT
10/23/97   ANGELINA                       FUNNEL CLOUD REPORTED IN
                                          THE CENTER COMMUNITY OF
                                          POLLOK.

18

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, 11:48 PM CDT	Tornado Warning	SHV	San Augustine	27 min
Oct 24, 1:36 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	39 min

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.