Alert archive / Texas / Flash Flood Warnings in 2018

Flash Flood Warning 8, NWS Austin/San Antonio, TX

June 4, 2018Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 4, 2018, 1:03 AM CDT for Travis County, Williamson 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: Jun 4, 2018, 1:03 AM CDT (06:03 UTC)
Expired: Jun 4, 2018, 4:00 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 36 km from the middle of the area, began a volume at 06:06 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

Fort Worth, TX (KFWD), launched 00:00Z, 6.1 hours before the alert went out and 271 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2210 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

457 
WGUS54 KEWX 040603
FFWEWX
TXC453-491-040900-
/O.NEW.KEWX.FF.W.0008.180604T0603Z-180604T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
103 AM CDT MON JUN 4 2018

The National Weather Service in Austin San Antonio has issued a

* Flash Flood Warning for...
  South central Williamson County in south central Texas...
  Northeastern Travis County in south central Texas...

* Until 400 AM CDT

* At 103 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Over three inches of rain have 
  already fallen around Pflugerville. Flash flooding is expected to 
  begin shortly.

* Some locations that will experience flooding include...
  Austin, Pflugerville, Taylor, Elgin, Hutto, Manor, Coupland,
  Hornsby Bend and Rices Crossing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3042 9736 3041 9738 3040 9738 3021 9755
      3023 9764 3044 9764 3055 9756 3055 9740

$$

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 10:59 PM CDT	Special Weather Statement	EWX	Bastrop, Fayette, Lee	61 min
Jun 3, 11:22 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	68 min
Jun 3, 11:39 PM CDT	Special Weather Statement	EWX	Travis	36 min
Jun 4, 12:04 AM CDT	Special Weather Statement	EWX	Williamson	56 min
Jun 4, 12:07 AM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	53 min
Jun 4, 12:19 AM CDT	Special Weather Statement	EWX	Burnet, Llano	41 min
Jun 4, 12:27 AM CDT	Areal Flood Advisory	EWX	Burnet, Travis, Williamson	4 hr
Jun 4, 12:51 AM CDT	Special Weather Statement	EWX	Travis	54 min
Jun 4, 1:06 AM CDT	Flash Flood Warning	EWX	Burnet, Llano	3 hr
Jun 4, 1:17 AM CDT	Special Weather Statement	EWX	Blanco	43 min
Jun 4, 1:47 AM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Llano, Travis	3 hr
Jun 4, 2:05 AM CDT	Special Weather Statement	EWX	Blanco	55 min
Jun 4, 2:10 AM CDT	Severe Thunderstorm Warning	EWX	Blanco	35 min
Jun 4, 2:36 AM CDT	Flash Flood Warning	EWX	Blanco, Burnet	3 hr
Jun 4, 3:56 AM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Llano	3 hr
Jun 4, 5:08 AM CDT	Special Weather Statement	EWX	Edwards	52 min
Jun 4, 5:33 AM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Llano	3 hr
Jun 4, 5:39 AM CDT	Special Weather Statement	EWX	Kerr	51 min

Nearby

Flash Flood Warnings in Texas, 2018 Every flash flood warning in 2018

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.