Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 13, 2021, 4:53 PM CDT for Nacogdoches County, San Augustine County, Shelby County, Texas. It was in force for 37 min. 3 reports 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
- Apr 13, 2021, 4:53 PM CDT (21:53 UTC)
- Expired
- Apr 13, 2021, 5:30 PM CDT
- In force
- 37 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Nacogdoches County, TX, San Augustine County, TX, Shelby County, TX
The radar
The Shreveport radar (KSHV), 105 km from the middle of the area, began a volume at 21:53 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 |
|---|---|---|---|
| Apr 13, 4:55 PM CDT | HAIL 1.5 | 3 Ne Nacogdoches, TX | PUBLIC REPORTS HAIL OFF APPLEBY SAND ROAD IN NORTHEAST NACOGDOCHES VIA SOCIAL MEDIA. |
| Apr 13, 5:05 PM CDT | HAIL 1 | 4 S Appleby, TX | |
| Apr 13, 5:32 PM CDT | HAIL 1 | 5 Se Appleby, TX | HAIL REPORTED NEAR THE SHADY GROVE COMMUNITY EAST OF NACOGDOCHES VIA KTRE SOCIAL MEDIA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.9 hours before the alert went out and 112 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1548 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
904
WUUS54 KSHV 132153
SVRSHV
TXC347-405-419-132230-
/O.NEW.KSHV.SV.W.0093.210413T2153Z-210413T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
453 PM CDT Tue Apr 13 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
Northeastern Nacogdoches County in eastern Texas...
Southwestern Shelby County in eastern Texas...
Northwestern San Augustine County in eastern Texas...
* Until 530 PM CDT.
* At 452 PM CDT, a severe thunderstorm was located 8 miles northeast
of Nacogdoches, moving east at 15 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...
Nacogdoches, Martinsville, Appleby, Arcadia and Stockman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3159 9461 3173 9464 3189 9435 3166 9428
TIME...MOT...LOC 2152Z 253DEG 13KT 3170 9456
HAIL...1.00IN
WIND...60MPH
$$
241 follow-up statement
273
WWUS54 KSHV 132210
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
510 PM CDT Tue Apr 13 2021
TXC347-405-419-132230-
/O.CON.KSHV.SV.W.0093.000000T0000Z-210413T2230Z/
Nacogdoches TX-Shelby TX-San Augustine TX-
510 PM CDT Tue Apr 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHEASTERN NACOGDOCHES...SOUTHWESTERN SHELBY AND NORTHWESTERN
SAN AUGUSTINE COUNTIES...
At 509 PM CDT, a severe thunderstorm was located 7 miles south of
Garrison, or 11 miles northeast of Nacogdoches, moving east at 15
mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Nacogdoches, Martinsville, Appleby, Arcadia and Stockman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This storm has produced large hail to golf ball size near Appleby.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3159 9461 3173 9464 3189 9435 3166 9428
TIME...MOT...LOC 2209Z 253DEG 13KT 3172 9449
HAIL...1.25IN
WIND...60MPH
$$
24The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 4:26 PM CDT | Special Weather Statement | SHV | Shelby | 49 min |
| Apr 13, 5:31 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, San Augustine, Shelby | 59 min |
| Apr 13, 5:52 PM CDT | Special Weather Statement | SHV | Shelby | 38 min |
| Apr 13, 6:00 PM CDT | Special Weather Statement | SHV | San Augustine | 30 min |
| Apr 13, 6:27 PM CDT | Severe Thunderstorm Warning | SHV | Panola, Rusk, Shelby | 63 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.