Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 190, NWS Austin/San Antonio, TX

October 27, 20215 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Oct 27, 2021, 4:05 AM CDT for 5 counties in Texas. It was in force for 40 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 27, 2021, 4:05 AM CDT (09:05 UTC)
Expired
Oct 27, 2021, 4:45 AM CDT
In force
40 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bandera County, TX, Kendall County, TX, Kerr County, TX, Medina County, TX, Uvalde County, TX

The radar

The Austin/San Antonio radar (KEWX), 99 km from the middle of the area, began a volume at 09:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 27, 1:32 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 9.1 hours before the alert went out and 176 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, Del Rio, TX at 00:00Z on 2021-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 815 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2021-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.193958Sfc1 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
815 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
2315 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

700 
WUUS54 KEWX 270905
SVREWX
TXC019-259-265-325-463-270945-
/O.NEW.KEWX.SV.W.0190.211027T0905Z-211027T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
405 AM CDT Wed Oct 27 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Central Medina County in south central Texas...
  Bandera County in south central Texas...
  Southeastern Kerr County in south central Texas...
  East central Uvalde County in south central Texas...
  Southwestern Kendall County in south central Texas...

* Until 445 AM CDT.

* At 405 AM CDT, severe thunderstorms were located along a line
  extending from near Medina to near Sabinal, moving east at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Medina, Boerne, Hondo, Castroville, Bandera, Tarpley, Sabinal,
  Walnut Grove, Camp Verde, D'Hanis, Bandera Falls, Quihi, Dunlay,
  Mico, Pipe Creek, Welfare, Nelson City, Bader, Lakehills and New
  Fountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2929 9952 2994 9930 2993 9872 2971 9878
      2969 9881 2963 9881 2930 9890
TIME...MOT...LOC 0905Z 275DEG 37KT 2987 9927 2929 9946 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MO

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 3:41 AM CDTSpecial Weather StatementEWXBandera64 min
Oct 27, 4:03 AM CDTSpecial Weather StatementEWXBurnet57 min
Oct 27, 4:08 AM CDTSevere Thunderstorm WarningEWXBandera, Kendall, Kerr, Medina, Real, Uvalde52 min
Oct 27, 4:22 AM CDTSpecial Weather StatementEWXBlanco, Comal, Hays, Travis53 min
Oct 27, 4:41 AM CDTSpecial Weather StatementEWXWilliamson49 min
Oct 27, 4:50 AM CDTSevere Thunderstorm WarningEWXBexar, Blanco, Comal, Hays, Kendall55 min
Oct 27, 5:00 AM CDTSpecial Weather StatementEWXBexar45 min
Oct 27, 5:08 AM CDTSpecial Weather StatementEWXBastrop, Caldwell, Guadalupe, Travis52 min
Oct 27, 5:31 AM CDTSpecial Weather StatementEWXBastrop, Lee59 min
Oct 27, 5:49 AM CDTSpecial Weather StatementEWXBexar, Guadalupe41 min
Oct 27, 6:02 AM CDTSpecial Weather StatementEWXBastrop, Caldwell58 min
Oct 27, 6:18 AM CDTSpecial Weather StatementEWXGonzales, Guadalupe, Wilson57 min
Oct 27, 6:43 AM CDTSpecial Weather StatementEWXFayette, Gonzales, Lavaca62 min
Oct 27, 7:45 AM CDTSpecial Weather StatementEWXDeWitt, Karnes, Lavaca30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.