Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 35, NWS Austin/San Antonio, TX

July 5, 2021Gillespie County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 5, 2021, 5:16 PM CDT for Gillespie County, Kerr County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 5, 2021, 5:16 PM CDT (22:16 UTC)
Expired: Jul 5, 2021, 8:30 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Gillespie County, TX, Kerr County, TX

The radar

The Laughlin AFB radar (KDFX), 137 km from the middle of the area, began a volume at 22:18 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, 10.3 hours before the alert went out and 168 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1872 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

706 
WGUS54 KEWX 052216
FFWEWX
TXC171-265-060130-
/O.NEW.KEWX.FF.W.0035.210705T2216Z-210706T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
516 PM CDT Mon Jul 5 2021

The National Weather Service in Austin/San Antonio has issued a

* Flash Flood Warning for...
  Southwestern Gillespie County in south central Texas...
  Central Kerr County in south central Texas...

* Until 830 PM CDT.

* At 516 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Kerrville, Ingram, Hunt, Waltonia, Mountain Home, Kerr Wildlife 
  Management Area, Harper and Kerrville-Schreiner Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3031 9930 3031 9929 2990 9909 2991 9946
      3029 9962 3029 9961 3029 9955 3029 9953
      3029 9952 3029 9951 3029 9950 3029 9947
      3029 9943 3029 9941 3029 9938 3029 9936
      3029 9930

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

YB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 8:37 AM CDT	Areal Flood Advisory	EWX	Edwards, Kerr, Real	3 hr
Jul 5, 12:59 PM CDT	Areal Flood Advisory	EWX	Edwards	3 hr
Jul 5, 1:57 PM CDT	Special Weather Statement	EWX	Kinney	63 min
Jul 5, 2:13 PM CDT	Special Weather Statement	EWX	Val Verde	47 min
Jul 5, 2:22 PM CDT	Areal Flood Advisory	EWX	Edwards, Val Verde	3 hr
Jul 5, 2:58 PM CDT	Areal Flood Advisory	EWX	Travis	3 hr
Jul 5, 3:54 PM CDT	Areal Flood Advisory	EWX	Blanco, Comal, Hays	3 hr
Jul 5, 4:02 PM CDT	Areal Flood Advisory	EWX	Comal, Guadalupe	3 hr
Jul 5, 4:06 PM CDT	Areal Flood Advisory	EWX	Val Verde	3 hr
Jul 5, 4:31 PM CDT	Areal Flood Advisory	EWX	Gillespie, Kerr	3 hr
Jul 5, 4:52 PM CDT	Special Weather Statement	EWX	Kinney	53 min
Jul 5, 5:02 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Comal, Kendall	3 hr
Jul 5, 5:54 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Bexar	3 hr
Jul 5, 6:16 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Medina	3 hr

Nearby

Flash Flood Warnings in Texas, 2021 Every flash flood 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.