Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 21, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Mar 12, 2001, 3:25 AM CST for Cass County, Harrison County, Marion County, Texas. It was in force for 65 min. 3 reports 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
- Mar 12, 2001, 3:25 AM CST (09:25 UTC)
- Expired
- Mar 12, 2001, 4:30 AM CST
- In force
- 65 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Cass County, TX, Harrison County, TX, Marion County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 12, 3:35 AM CST | Thunderstorm Wind 52 E | Jefferson, TX | Several large trees toppled near Lake O The Pines. |
| Mar 12, 3:50 AM CST | Thunderstorm Wind 70 E | Marshall, TX | A roof was blown off an old wood frame house in west Marshall from straight line winds (macroburst). |
| Mar 12, 4:00 AM CST | Hail 1 | Marshall Northeast, TX | Hail completely covered the ground while trees and vegetation were stripped. |
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 nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 9.4 hours before the alert went out and 68 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.
- Mixed-layer CAPE
- 3 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 676 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 373 m²/s²
- 0-3 km storm-relative helicity
- 517 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
490 WUUS54 KSHV 120926 SVRSHV TXC067-203-315-121030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 325 AM CST MON MAR 12 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CASS COUNTY IN NORTHEAST TEXAS HARRISON COUNTY IN NORTHEAST TEXAS MARION COUNTY IN NORTHEAST TEXAS * UNTIL 430 AM CST * AT 325 AM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM NORTH OF DAINGERFIELD...ACROSS LAKE O THE PINES TO NEAR LONGVIEW TEXAS. THIS LINE OF SEVERE THUNDERSTORMS WAS MOVING TO THE EAST NORTHEAST NEAR 30 MPH. THIS LINE OF THUNDERSTORMS WILL PRODUCE STRONG DAMAGING WINDS UP TO 60 MPH. IF YOU ARE OUTSIDE...HEAD FOR A STRONG BUILDING. BE ALERT FOR DOWNED TREES AND POWER LINES. GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUILDING. STAY AWAY FROM WINDOWS. REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING FOR... CASS COUNTY IN NORTHEAST TEXAS HARRISON COUNTY IN NORTHEAST TEXAS MARION COUNTY IN NORTHEAST TEXAS UNTIL 430 AM CST.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 2:35 AM CST | Severe Thunderstorm Warning | SHV | Smith | 25 min |
| Mar 12, 3:01 AM CST | Severe Thunderstorm Warning | SHV | Gregg | 44 min |
| Mar 12, 3:10 AM CST | Severe Thunderstorm Warning | SHV | Camp, Morris, Upshur | 35 min |
| Mar 12, 3:40 AM CST | Severe Thunderstorm Warning | SHV | Panola | 65 min |
| Mar 12, 4:19 AM CST | Severe Thunderstorm Warning | SHV | Shelby | 41 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
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.