Alert archive / Texas / Flash Flood Warnings in 2015

Flash Flood Warning 99, NWS Austin/San Antonio, TX

May 30, 2015Caldwell County, Guadalupe County, Hays County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 30, 2015, 3:39 PM CDT for Caldwell County, Guadalupe County, Hays County, Texas. It was in force for 4 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 30, 2015, 3:39 PM CDT (20:39 UTC)
Expired: May 30, 2015, 7:45 PM CDT
In force: 4 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Caldwell County, TX, Guadalupe County, TX, Hays County, TX

The radar

The Austin/San Antonio radar (KEWX), 28 km from the middle of the area, began a volume at 20:42 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.

What was reported inside it

Time	Report	Where	Remark
May 30, 4:30 PM CDT	FLASH FLOOD	Fentress, TX	STATE PARK ROAD NEAR FENTRESS CLOSED DUE TO HIGH WATER. ALSO... SHERRIFS OFFICE REPORTS NUMBEROUS ROAD CLOSURES ACROSS THE COUNTY.
May 30, 6:00 PM CDT	FLASH FLOOD	2 Wsw Joliet, TX	FLOODED ROADS AT BUGTUSSLE LANE AND ALSO AT ACORN ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.7 hours before the alert went out and 241 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: 1820 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

109 
WGUS54 KEWX 302039
FFWEWX
TXC055-187-209-310045-
/O.NEW.KEWX.FF.W.0099.150530T2039Z-150531T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
339 PM CDT SAT MAY 30 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN GUADALUPE COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHEASTERN HAYS COUNTY IN SOUTH CENTRAL TEXAS...
  WESTERN CALDWELL COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 745 PM CDT
    
* AT 338 PM CDT...DOPPLER RADAR INDICATED A NEARLY STATIONARY 
  THUNDERSTORM PRODUCING HEAVY RAIN FROM NEAR SAN MARCOS TO 
  MARTINDALE AND STAPLES. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NEW BRAUNFELS...SAN MARCOS...LOCKHART...MARTINDALE...UHLAND...
  MUSTANG RIDGE...NIEDERWALD...STAPLES...ZORN...FENTRESS...
  GERONIMO...LYTTON SPRINGS...MENDOZA...REDWOOD...REEDVILLE...ST JOHN
  COLONY...MAXWELL AND DALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. TURN 
AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 2970 9775 2969 9808 2975 9800 2977 9801
      3004 9774 3002 9771 3007 9766 2996 9753

$$

MO

1 follow-up statement

168 
WGUS74 KEWX 302313
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
613 PM CDT SAT MAY 30 2015

TXC055-187-209-310045-
/O.CON.KEWX.FF.W.0099.000000T0000Z-150531T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUADALUPE TX-HAYS TX-CALDWELL TX-
613 PM CDT SAT MAY 30 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHEASTERN GUADALUPE...SOUTHEASTERN HAYS AND SOUTHWESTERN CALDWELL
COUNTIES...

AT 607 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN ACROSS THE WARNED AREA SOUTH OF SAN MARCOS.  FLASH 
FLOODING WILL LIKELY CONTINUE FROM JUST SOUTH OF SAN MARCOS TO 
STAPLES TO FENTRESS THROUGH AT LEAST 7 PM CDT.

OTHER LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...NEW 
BRAUNFELS...LOCKHART...MARTINDALE...UHLAND...ZORN...GERONIMO... 
MAXWELL...REDWOOD AND REEDVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES. BE PREPARED FOR RAPID RISES ALONG THE SAN 
MARCOS AND BLANCO RIVERS AND YORK CREEK.

&&

LAT...LON 2970 9775 2969 9808 2975 9800 2977 9801
      2997 9781 2990 9777 2986 9762

$$

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 4:24 AM CDT	Special Weather Statement	EWX	Edwards, Gillespie, Kerr, Llano, Real, Val Verde	51 min
May 30, 5:11 AM CDT	Special Weather Statement	EWX	Bandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 4 more	64 min
May 30, 9:11 AM CDT	Special Weather Statement	EWX	Val Verde	49 min
May 30, 11:26 AM CDT	Areal Flood Advisory	EWX	Val Verde	109 min
May 30, 11:26 AM CDT	Special Weather Statement	EWX	Edwards, Kinney	64 min
May 30, 12:05 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	40 min
May 30, 12:45 PM CDT	Severe Thunderstorm Warning	EWX	Kinney	45 min
May 30, 1:14 PM CDT	Areal Flood Advisory	EWX	Kinney, Maverick	2 hr
May 30, 1:23 PM CDT	Special Weather Statement	EWX	Maverick	52 min
May 30, 1:28 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Uvalde	47 min
May 30, 2:15 PM CDT	Special Weather Statement	EWX	Bandera, Comal, Hays, Kendall	45 min
May 30, 2:21 PM CDT	Special Weather Statement	EWX	Dimmit, Uvalde, Zavala	54 min
May 30, 2:40 PM CDT	Flash Flood Warning	EWX	Kinney, Uvalde	3 hr
May 30, 2:46 PM CDT	Flash Flood Warning	EWX	Bandera, Bexar, Blanco, Comal, Hays, Kendall and 2 more	4 hr
May 30, 3:24 PM CDT	Special Weather Statement	EWX	Caldwell, Comal, Hays, Kendall	36 min
May 30, 3:32 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Guadalupe	43 min
May 30, 3:43 PM CDT	Special Weather Statement	EWX	Frio	47 min
May 30, 3:54 PM CDT	Special Weather Statement	EWX	Medina	51 min
May 30, 3:59 PM CDT	Special Weather Statement	EWX	Bexar, Guadalupe	61 min
May 30, 4:10 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Guadalupe	49 min
May 30, 4:11 PM CDT	Special Weather Statement	EWX	Fayette	49 min
May 30, 4:21 PM CDT	Flash Flood Warning	EWX	Bexar, Comal, Guadalupe, Medina, Wilson	4 hr
May 30, 4:36 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	39 min
May 30, 4:40 PM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales, Guadalupe	4 hr
May 30, 4:43 PM CDT	Special Weather Statement	EWX	Travis	47 min
May 30, 4:53 PM CDT	Areal Flood Advisory	EWX	Travis	3 hr
May 30, 5:00 PM CDT	Special Weather Statement	EWX	Fayette	45 min
May 30, 5:21 PM CDT	Special Weather Statement	EWX	Atascosa, DeWitt, Karnes	39 min
May 30, 5:25 PM CDT	Flash Flood Warning	EWX	Travis	2 hr
May 30, 5:46 PM CDT	Areal Flood Advisory	EWX	Atascosa, DeWitt, Karnes, Lavaca, Wilson	3 hr
May 30, 5:57 PM CDT	Flash Flood Warning	EWX	DeWitt, Karnes, Lavaca	4 hr
May 30, 6:19 PM CDT	Special Weather Statement	EWX	DeWitt	41 min

Nearby

Flash Flood Warnings in Texas, 2015 Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.