Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this special weather statement at Sep 6, 2021, 4:39 PM CDT for Bexar County, Texas. It was in force for 66 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, 4:39 PM CDT (21:39 UTC)
- Expired
- Sep 6, 2021, 5:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Austin/San Antonio, TX
- Hail
- 0.50 in
- Wind
- 55
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 78 km from the middle of the area, began a volume at 21:41 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
Del Rio, TX (KDRT), launched 12:00Z, 9.7 hours before the alert went out and 204 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
- 103 J/kg
- Mixed-layer CIN
- -269 J/kg
- Mixed-layer LCL
- 1941 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- -47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
818
WWUS84 KEWX 062139
SPSEWX
Special Weather Statement
National Weather Service Austin/San Antonio TX
439 PM CDT Mon Sep 6 2021
TXZ204-205-220-062245-
Atascosa TX-Bexar TX-Medina TX-
439 PM CDT Mon Sep 6 2021
...Strong thunderstorms will impact portions of east central Medina,
northwestern Atascosa and western Bexar Counties through 545 PM
CDT...
At 439 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Helotes to near Stinson Municipal Airport.
Movement was south at 20 mph.
HAZARD...Wind gusts of 50 to 55 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
San Antonio, Castroville, San Antonio Int Airport, Stinson Municipal
Airport, Leon Valley, Helotes, Kirby, Alamo Heights, Terrell Hills,
Shavano Park, Hollywood Park, Cross Mountain, Lytle, Olmos Park,
Somerset, Natalia, China Grove, Lacoste, Noonan and The Dominion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2925 9900 2906 9853 2942 9834 2973 9859
2947 9896
TIME...MOT...LOC 2139Z 021DEG 16KT 2961 9870 2940 9844
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 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, 4:17 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Comal, Guadalupe, Hays | 58 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, 4:51 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
Special Weather Statements in Texas, 2021Every special weather statement 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.