Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Austin/San Antonio, TX

October 13, 2021Comal County, Hays County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Oct 13, 2021, 8:28 PM CDT for Comal County, Hays County, Texas. It was in force for 47 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
Oct 13, 2021, 8:28 PM CDT (01:28 UTC)
Expired
Oct 13, 2021, 9:15 PM CDT
In force
47 min
Issued by
NWS Austin/San Antonio, TX
Hail
0.50 in
Wind
40
Spout
Possible

Counties Comal County, TX, Hays County, TX

The radar

The Austin/San Antonio radar (KEWX), 33 km from the middle of the area, began a volume at 01:29 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 00:00Z, 1.5 hours before the alert went out and 263 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.

Skew-T log-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2021-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1651 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2021-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1651 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.7
Supercell composite
7.0

Open this sounding in Storm Lab

The text

As transmitted.

151 
WWUS84 KEWX 140128
SPSEWX

Special Weather Statement
National Weather Service Austin/San Antonio TX
828 PM CDT Wed Oct 13 2021
 
TXZ189>192-205-206-140215-
Comal TX-Bexar TX-Blanco TX-Hays TX-Kendall TX-Travis TX-
828 PM CDT Wed Oct 13 2021

...Strong thunderstorms will impact portions of Hays, southwestern
Travis, southeastern Blanco, southeastern Kendall, north central
Bexar and Comal Counties through 915 PM CDT...

At 827 PM CDT, Doppler radar was tracking strong thunderstorms
capable of producing a landspout along a line extending from near
Henly to near Fischer to near Fair Oaks Ranch. Movement was east at
30 mph.

HAZARD...Landspouts, winds in excess of 40 mph, and half inch hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Gusty winds 
         could knock down tree limbs and blow around unsecured 
         objects.

Locations impacted include...
Austin, New Braunfels, Schertz, Buda, Selma, Dripping Springs,
Wimberley, Tanglewood Forest, Canyon Lake Dam, Canyon Lake, Lakeway,
Fair Oaks Ranch, Bee Cave, Bulverde, Garden Ridge, West Lake Hills,
Woodcreek, Rollingwood, Bear Creek and Guadalupe River State Park.

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.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

If on or near Canyon Lake, get out of the water and move indoors or 
inside a vehicle. Remember, lightning can strike out to 10 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now! Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3032 9769 2965 9817 2960 9829 2973 9868
      3033 9823
TIME...MOT...LOC 0127Z 259DEG 24KT 3025 9817 2996 9833 2973 9860 

LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

CP

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 13, 7:44 PM CDTSpecial Weather StatementEWXKendall46 min
Oct 13, 7:53 PM CDTAreal Flood AdvisoryEWXBandera, Kendall, Kerr3 hr
Oct 13, 8:05 PM CDTTornado WarningEWXBlanco, Comal, Kendall25 min
Oct 13, 8:21 PM CDTSpecial Weather StatementEWXWilliamson39 min
Oct 13, 8:35 PM CDTAreal Flood AdvisoryEWXBlanco3 hr
Oct 13, 8:55 PM CDTFlash Flood Warning Considerable damage threatEWXBlanco, Kendall6 hr
Oct 13, 9:25 PM CDTAreal Flood AdvisoryEWXBexar, Comal, Hays3 hr
Oct 13, 9:49 PM CDTFlash Flood Warning Considerable damage threatEWXBexar, Comal3 hr
Oct 13, 9:55 PM CDTAreal Flood AdvisoryEWXTravis3 hr
Oct 13, 10:24 PM CDTAreal Flood AdvisoryEWXWilliamson3 hr
Oct 13, 10:38 PM CDTAreal Flood AdvisoryEWXHays, Travis3 hr
Oct 13, 10:52 PM CDTRiver Flood WarningEWXBlanco, Hays3 hr
Oct 13, 11:00 PM CDTFlash Flood Warning Considerable damage threatEWXHays6 hr
Oct 13, 11:49 PM CDTAreal Flood AdvisoryEWXBastrop, Travis, Williamson4 hr
Oct 13, 11:59 PM CDTAreal Flood AdvisoryEWXBexar, Caldwell, Comal, Guadalupe4 hr
Oct 14, 12:46 AM CDTFlash Flood Warning Considerable damage threatEWXCaldwell, Comal, Guadalupe, Hays10 hr
Oct 14, 12:57 AM CDTRiver Flood WarningEWXHays4 hr
Oct 14, 1:04 AM CDTFlash Flood WarningEWXBexar, Comal4 hr
Oct 14, 1:11 AM CDTAreal Flood AdvisoryEWXCaldwell, Gonzales, Guadalupe, Wilson3 hr
Oct 14, 1:50 AM CDTRiver Flood WarningEWXComal, Guadalupe7 hr
Oct 14, 2:04 AM CDTSpecial Weather StatementEWXGonzales41 min
Oct 14, 2:39 AM CDTSpecial Weather StatementEWXGonzales51 min
Oct 14, 2:48 AM CDTTornado WarningEWXGonzales, Lavaca27 min
Oct 14, 3:11 AM CDTRiver Flood WarningEWXComal, Guadalupe4 hr
Oct 14, 3:17 AM CDTAreal Flood AdvisoryEWXBastrop, Fayette, Lee3 hr
Oct 14, 3:19 AM CDTTornado WarningEWXGonzales, Lavaca26 min
Oct 14, 3:39 AM CDTTornado WarningEWXFayette, Gonzales, Lavaca36 min
Oct 14, 3:42 AM CDTFlash Flood Warning Considerable damage threatEWXCaldwell, Gonzales, Guadalupe, Karnes, Lavaca, Wilson7 hr
Oct 14, 4:13 AM CDTRiver Flood WarningEWXComal, Gonzales, Guadalupe3 hr
Oct 14, 4:24 AM CDTSevere Thunderstorm WarningEWXFayette, Gonzales, Lavaca66 min
Oct 14, 5:07 AM CDTFlash Flood Warning Considerable damage threatEWXFayette5 hr
Oct 14, 5:10 AM CDTSevere Thunderstorm WarningEWXLavaca21 min
Oct 14, 5:36 AM CDTRiver Flood WarningEWXCaldwell, Hays8 hr
Oct 14, 5:36 AM CDTRiver Flood WarningEWXCaldwell, Gonzales38 hr
Oct 14, 6:27 AM CDTFlash Flood Warning Considerable damage threatEWXDeWitt, Karnes, Lavaca6 hr
Oct 14, 7:15 AM CDTRiver Flood WarningEWXTravis6 hr
Oct 14, 7:19 AM CDTRiver Flood WarningEWXGonzales3 days
Oct 14, 7:52 AM CDTRiver Flood WarningEWXGuadalupe3 hr
Oct 14, 8:23 AM CDTRiver Flood WarningEWXBexar7 hr
Oct 14, 8:28 AM CDTRiver Flood WarningEWXBexar21 hr
Oct 14, 8:28 AM CDTRiver Flood WarningEWXBexar, Wilson29 hr
Oct 14, 8:29 AM CDTRiver Flood WarningEWXBexar12 hr
Oct 14, 9:10 AM CDTRiver Flood WarningEWXDeWitt3 days
Oct 14, 9:11 AM CDTRiver Flood WarningEWXDeWitt5 days
Oct 14, 10:54 AM CDTRiver Flood WarningEWXKarnes, Wilson33 hr
Oct 14, 10:55 AM CDTRiver Flood WarningEWXKarnes45 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.