Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 179, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 6, 2021, 4:17 PM CDT for 4 counties in Texas. It was in force for 58 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
- Sep 6, 2021, 4:17 PM CDT (21:17 UTC)
- Expired
- Sep 6, 2021, 5:15 PM CDT
- In force
- 58 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Caldwell County, TX, Comal County, TX, Guadalupe County, TX, Hays County, TX
The radar
The Austin/San Antonio radar (KEWX), 37 km from the middle of the area, began a volume at 21:21 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 nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 9.3 hours before the alert went out and 261 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
- 1100 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -58 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
095
WUUS54 KEWX 062117
SVREWX
TXC055-091-187-209-062215-
/O.NEW.KEWX.SV.W.0179.210906T2117Z-210906T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
417 PM CDT Mon Sep 6 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Northwestern Caldwell County in south central Texas...
Hays County in south central Texas...
North central Guadalupe County in south central Texas...
Northeastern Comal County in south central Texas...
* Until 515 PM CDT.
* At 417 PM CDT, a severe thunderstorm was located near Buda, moving
southwest at 20 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...
San Marcos, Kyle, Buda, Dripping Springs, Wimberley, Canyon Lake
Dam, Canyon Lake, Woodcreek, Martindale, Uhland, Mustang Ridge,
Niederwald, Bear Creek, Zorn, Driftwood, Manchaca, Mountain City,
Hays, Hunter and San Marcos Regional Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3016 9789 3003 9772 3003 9770 2973 9796
2986 9830 3021 9798
TIME...MOT...LOC 2117Z 031DEG 19KT 3006 9790
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MOThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 8:21 PM CDT | Areal Flood Advisory | EWX | Williamson | 2 hr |
| Sep 6, 2:32 PM CDT | Special Weather Statement | EWX | Guadalupe | 28 min |
| Sep 6, 3:01 PM CDT | Special Weather Statement | EWX | Guadalupe | 44 min |
| Sep 6, 3:03 PM CDT | Special Weather Statement | EWX | Bastrop | 42 min |
| Sep 6, 3:45 PM CDT | Special Weather Statement | EWX | Caldwell, Fayette, Hays, Travis | 45 min |
| Sep 6, 3:47 PM CDT | Special Weather Statement | EWX | Bexar, Guadalupe | 43 min |
| Sep 6, 3:50 PM CDT | Special Weather Statement | EWX | Kendall | 55 min |
| Sep 6, 4:24 PM CDT | Special Weather Statement | EWX | Kendall | 51 min |
| Sep 6, 4:35 PM CDT | Special Weather Statement | EWX | Bandera, Edwards, Kinney, Medina, Real, Uvalde | 55 min |
| Sep 6, 4:39 PM CDT | Special Weather Statement | EWX | Bexar | 66 min |
| Sep 6, 4:51 PM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Comal, Kendall, Kerr, Medina | 3 hr |
| Sep 6, 5:02 PM CDT | Special Weather Statement | EWX | Hays | 58 min |
| Sep 6, 5:06 PM CDT | Special Weather Statement | EWX | Gonzales, Lavaca | 54 min |
| Sep 6, 5:19 PM CDT | Areal Flood Advisory | EWX | Blanco, Comal, Hays, Kendall | 3 hr |
| Sep 6, 5:35 PM CDT | Special Weather Statement | EWX | Blanco | 40 min |
| Sep 6, 6:19 PM CDT | Flash Flood Warning | EWX | Blanco | 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.