Alert archive / Texas / Tornado Warnings in 2002

Tornado Warning 6, NWS Houston/Galveston, TX

March 30, 2002Polk County, Trinity County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Mar 30, 2002, 7:01 PM CST for Polk County, Trinity County, Texas. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 30, 2002, 7:01 PM CST (01:01 UTC)
Expired: Mar 30, 2002, 7:30 PM CST
In force: 29 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

Counties Polk County, TX, Trinity County, TX

The radar

The Shreveport radar (KSHV), 178 km from the middle of the area, began a volume at 01:00 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
Mar 30, 7:05 PM CST	Tornado F3	Diboll, TX	Numerous trees and power lines broken, snapped, and pulled out of the ground along the entire track. Several barns were severely damaged and numerous homes were with missing roofs while others suffered severe roof and structural damage. South of the Ora Comm

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
Mar 30, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.0 hours before the alert went out and 185 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.

230 
WFUS54 KHGX 310101
TORHOU
TXC373-455-310130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
700 PM CST SAT MAR 30 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  TRINITY COUNTY IN SOUTHEAST TEXAS
  NORTHERN POLK COUNTY IN SOUTHEAST TEXAS

* UNTIL 730 PM CST

* AT 650 PM CST...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE     
  OF PRODUCING A TORNADO OVER TRINITY COUNTY 10 MILES NORTHEAST OF   
  GROVETON...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IN THE PATH OF THE TORNADO INCLUDE...
RURAL EASTERN TRINITY COUNTY
RURAL NORTHERN POLK COUNTY

MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON YOUR CAR
OR MOBILE HOME FOR A STRONG SHELTER NOW

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3112 9504 3099 9490 3110 9462 3130 9486

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 6:04 PM CST	Tornado Warning	HGX	Matagorda, Wharton	41 min
Mar 30, 6:22 PM CST	Severe Thunderstorm Warning	HGX	Polk, Trinity	38 min
Mar 30, 6:31 PM CST	Severe Thunderstorm Warning	HGX	Harris	59 min
Mar 30, 6:33 PM CST	Tornado Warning	HGX	Polk	27 min
Mar 30, 6:48 PM CST	Tornado Warning	HGX	Brazoria, Fort Bend, Matagorda	57 min
Mar 30, 7:23 PM CST	Severe Thunderstorm Warning	HGX	Harris, Liberty	37 min
Mar 30, 7:39 PM CST	Severe Thunderstorm Warning	HGX	Polk, San Jacinto	36 min
Mar 30, 7:47 PM CST	Tornado Warning	HGX	Chambers, Galveston, Harris	43 min
Mar 30, 7:54 PM CST	Special Marine Warning	HGX		66 min
Mar 30, 8:01 PM CST	Tornado Warning	HGX	Liberty	29 min
Mar 30, 8:32 PM CST	Severe Thunderstorm Warning	HGX	Chambers, Liberty	43 min
Mar 30, 9:08 PM CST	Special Marine Warning	HGX		67 min
Mar 30, 10:17 PM CST	Special Marine Warning	HGX		58 min
Mar 31, 3:02 AM CST	Severe Thunderstorm Warning	HGX	Trinity	13 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.