Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 94, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 13, 2021, 5:31 PM CDT for Nacogdoches County, San Augustine County, Shelby County, Texas. It was in force for 59 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
- Apr 13, 2021, 5:31 PM CDT (22:31 UTC)
- Expired
- Apr 13, 2021, 6:30 PM CDT
- In force
- 59 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), 113 km from the middle of the area, began a volume at 22:30 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, 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, 10.5 hours before the alert went out and 121 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.
453
WUUS54 KSHV 132231
SVRSHV
TXC347-405-419-132330-
/O.NEW.KSHV.SV.W.0094.210413T2231Z-210413T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
531 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 630 PM CDT.
* At 531 PM CDT, a severe thunderstorm was located near Melrose, or 7
miles east of Nacogdoches, moving east at 5 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 and Melrose.
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 3157 9463 3174 9457 3168 9426 3149 9448
TIME...MOT...LOC 2231Z 287DEG 5KT 3164 9452
HAIL...1.00IN
WIND...60MPH
$$
241 follow-up statement
517
WWUS54 KSHV 132318
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
618 PM CDT Tue Apr 13 2021
TXC347-405-419-132330-
/O.CON.KSHV.SV.W.0094.000000T0000Z-210413T2330Z/
Nacogdoches TX-Shelby TX-San Augustine TX-
618 PM CDT Tue Apr 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR EAST CENTRAL NACOGDOCHES...SOUTHWESTERN SHELBY AND NORTHWESTERN
SAN AUGUSTINE COUNTIES...
At 618 PM CDT, a severe thunderstorm was located over Martinsville,
or 12 miles east of Nacogdoches, moving east at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Martinsville and Melrose.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3158 9452 3167 9435 3168 9426 3149 9448
TIME...MOT...LOC 2318Z 287DEG 5KT 3162 9445
HAIL...1.00IN
WIND...60MPH
$$
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, 4:53 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, San Augustine, Shelby | 37 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.