Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 45, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 7, 2021, 2:12 PM CDT for 4 counties in Texas. It was in force for 63 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
- Apr 7, 2021, 2:12 PM CDT (19:12 UTC)
- Expired
- Apr 7, 2021, 3:15 PM CDT
- In force
- 63 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Gregg County, TX, Harrison County, TX, Marion County, TX, Upshur County, TX
The radar
The Shreveport radar (KSHV), 90 km from the middle of the area, began a volume at 19:14 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 |
|---|---|---|---|
| Apr 7, 12:38 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 7.2 hours before the alert went out and 98 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
- 532 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 506 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 267 m²/s²
- 0-3 km storm-relative helicity
- 433 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
907
WUUS54 KSHV 071912
SVRSHV
TXC183-203-315-459-072015-
/O.NEW.KSHV.SV.W.0045.210407T1912Z-210407T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
212 PM CDT Wed Apr 7 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
Western Marion County in northeastern Texas...
Northwestern Harrison County in northeastern Texas...
Central Upshur County in northeastern Texas...
Northwestern Gregg County in northeastern Texas...
* Until 315 PM CDT.
* At 212 PM CDT, a severe thunderstorm was located near West
Mountain, or near Gilmer, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Longview, White Oak, Gladewater, Gilmer, Ore City, Clarksville
City, East Mountain, Diana, West Mountain, Berea, Harleton, Union
Grove, Warren City, Lassater, Nesbitt, Bettie, Pritchett and
Judson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 800 PM CDT for northeastern
Texas.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3254 9501 3281 9505 3288 9441 3259 9435
TIME...MOT...LOC 1912Z 260DEG 31KT 3267 9496
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
441 follow-up statement
003
WWUS54 KSHV 071939
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
239 PM CDT Wed Apr 7 2021
TXC183-203-315-459-072015-
/O.CON.KSHV.SV.W.0045.000000T0000Z-210407T2015Z/
Marion TX-Harrison TX-Upshur TX-Gregg TX-
239 PM CDT Wed Apr 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR WESTERN MARION...NORTHWESTERN HARRISON...NORTHEASTERN UPSHUR AND
NORTH CENTRAL GREGG COUNTIES...
At 239 PM CDT, a severe thunderstorm was located near Diana, or 14
miles north of Longview, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Longview, Ore City, Diana, Berea, Harleton, Lassater, Nesbitt and
Judson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 800 PM CDT for northeastern
Texas.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3256 9477 3284 9480 3288 9441 3259 9435
TIME...MOT...LOC 1939Z 260DEG 31KT 3271 9469
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
44The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 1:22 PM CDT | Severe Thunderstorm Warning | SHV | Sabine, San Augustine, Shelby | 38 min |
| Apr 7, 1:32 PM CDT | Special Weather Statement | SHV | Camp, Upshur | 43 min |
| Apr 7, 2:30 PM CDT | Special Weather Statement | SHV | Cherokee | 45 min |
| Apr 7, 4:02 PM CDT | Special Weather Statement | SHV | Angelina, San Augustine, Shelby | 43 min |
| Apr 7, 4:09 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 51 min |
| Apr 7, 4:50 PM CDT | Special Weather Statement | SHV | San Augustine | 40 min |
| Apr 7, 4:58 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 62 min |
| Apr 7, 5:36 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 39 min |
| Apr 7, 6:25 PM CDT | Areal Flood Advisory | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 3 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021
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.