Alert archive / Texas / Tornado Warnings in 2002

Tornado Warning 3, NWS Shreveport, LA

March 30, 2002Nacogdoches County, Texas

NWS Shreveport, LA issued this tornado warning at Mar 30, 2002, 7:47 PM CST for Nacogdoches County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 30, 2002, 7:47 PM CST (01:47 UTC)
Expired: Mar 30, 2002, 8:30 PM CST
In force: 43 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Nacogdoches County, TX

The radar

The Shreveport radar (KSHV), 123 km from the middle of the area, began a volume at 01:51 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
Mar 30, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.8 hours before the alert went out and 130 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: 7 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 459 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KSHV 310147
TORSHV
TXC347-310230-
/NEW.KSHV.TO.W.0009.310147-310230/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
747 PM CST SAT MAR 30 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NACOGDOCHES COUNTY IN EASTERN TEXAS

* UNTIL 830 PM CST

* AT 747 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 12 MILES SOUTH OF CHIRENO...OR ABOUT 18
  MILES EAST OF LUFKIN...MOVING NORTHEAST AT 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  5 MILES SOUTHEAST OF CHIRENO AT 815 PM CST

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
FOR...
  NACOGDOCHES COUNTY IN EASTERN TEXAS
UNTIL 830 PM CST.

LAT...LON 3143 9453 3132 9435 3150 9433 3161 9435

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 6:10 PM CST	Tornado Warning	SHV	Nacogdoches	35 min
Mar 30, 6:23 PM CST	Severe Thunderstorm Warning	SHV	Panola	37 min
Mar 30, 6:55 PM CST	Severe Thunderstorm Warning	SHV	Shelby	50 min
Mar 30, 6:56 PM CST	Severe Thunderstorm Warning	SHV	Angelina	64 min
Mar 30, 7:10 PM CST	Severe Thunderstorm Warning	SHV	Harrison	65 min
Mar 30, 7:48 PM CST	Tornado Warning	SHV	Angelina	27 min
Mar 30, 7:56 PM CST	Tornado Warning	SHV	San Augustine	49 min
Mar 30, 8:20 PM CST	Tornado Warning	SHV	Shelby	55 min
Mar 31, 12:21 AM CST	Severe Thunderstorm Warning	SHV	Rusk	54 min
Mar 31, 12:55 AM CST	Severe Thunderstorm Warning	SHV	Panola	50 min
Mar 31, 3:20 AM CST	Severe Thunderstorm Warning	SHV	Angelina	55 min
Mar 31, 3:53 AM CST	Severe Thunderstorm Warning	SHV	Nacogdoches	52 min
Mar 31, 3:55 AM CST	Severe Thunderstorm Warning	SHV	Shelby	65 min
Mar 31, 4:17 AM CST	Severe Thunderstorm Warning	SHV	San Augustine	58 min
Mar 31, 4:31 AM CST	Severe Thunderstorm Warning	SHV	Sabine	59 min

Nearby

Tornado Warnings in Texas, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.