Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 11, NWS Brownsville, TX

August 21, 2016Jim Hogg County, Zapata County, Texas

NWS Brownsville, TX issued this flash flood warning at Aug 21, 2016, 3:28 AM CDT for Jim Hogg County, Zapata 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: Aug 21, 2016, 3:28 AM CDT (08:28 UTC)
Expired: Aug 21, 2016, 7:45 AM CDT
In force: 4 hr
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

Counties Jim Hogg County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 193 km from the middle of the area, began a volume at 08:27 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
Aug 21, 4:50 AM CDT	FLASH FLOOD	Zapata, TX	STREET FLOODING
Aug 21, 5:34 AM CDT	FLASH FLOOD	Zapata, TX	ZAPATA COUNTY SHERIFFS OFFICE REPORTED MULTIPLE DEEP WATER RESCUES IN THE ZAPATA AND MEDINA AREAS DUE TO STALLED CARS. THE SHERIFFS OFFICE ALSO REPORTED A FOOT AND A HALF OF WATER OVER HIGHWAY 83 IN ZAPATA.

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 00:00Z, 8.5 hours before the alert went out and 205 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: 1565 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

As transmitted.

289 
WGUS54 KBRO 210828
FFWBRO
TXC247-505-211015-
/O.NEW.KBRO.FF.W.0011.160821T0828Z-160821T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
328 AM CDT SUN AUG 21 2016

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN ZAPATA COUNTY IN DEEP SOUTH TEXAS...
  WEST CENTRAL JIM HOGG COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 515 AM CDT

* AT 321 AM CDT...DOPPLER RADAR INDICATED AN AREA OF NEARLY
  STATIONARY THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS PARTS OF THE
  WARNED AREA. AS MUCH AS 3 TO 5 INCHES OF RAIN HAVE FALLEN NEAR OR
  AROUND ESCOBAS. THESE STORMS WILL CONTINUE TO SLOWLY MOVE
  SOUTHWEST OVER THE CITY OF ZAPATA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ZAPATA...BUSTAMANTE...MEDINA...ZAPATA MIDDLE SCHOOL...LAS PALMAS...
  ESCOBAS...ZAPATA HIGH SCHOOL...FALCON LAKE ESTATES...ZAPATA COUNTY
  PUBLIC LIBRARY AND FALCON SHORES.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 2722 9894 2704 9873 2674 9923 2676 9924
      2679 9924 2682 9926 2685 9927 2686 9929
      2687 9932 2688 9933 2690 9932 2692 9933
      2693 9938

$$

69

1 follow-up statement

705 
WGUS54 KBRO 211013
FFWBRO
TXC247-505-211245-
/O.EXT.KBRO.FF.W.0011.000000T0000Z-160821T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
513 AM CDT SUN AUG 21 2016

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SOUTHERN ZAPATA COUNTY IN DEEP SOUTH TEXAS...
  WEST CENTRAL JIM HOGG COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 745 AM CDT

* AT 509 AM CDT...DOPPLER RADAR INDICATED AN AREA OF NEARLY
  STATIONARY THUNDERSTORMS CONTINUING TO PRODUCING HEAVY RAIN ACROSS
  PARTS OF THE WARNED AREA. AS MUCH AS 5 TO 7 INCHES OF RAIN HAVE
  FALLEN NEAR OR AROUND ESCOBAS. THESE STORMS WILL CONTINUE TO BRING
  HEAVY RAINFALL TO THE CITY OF ZAPATA WHERE NEARLY 3 INCHES OF RAIN
  HAVE FALLEN OVER THE LAST TWO HOURS. FLASH FLOODING IS OCCURRING
  AND WILL CONTINUE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ZAPATA...BUSTAMANTE...MEDINA...ZAPATA MIDDLE SCHOOL...LAS PALMAS...
  ESCOBAS...ZAPATA HIGH SCHOOL...FALCON LAKE ESTATES...ZAPATA COUNTY
  PUBLIC LIBRARY AND FALCON SHORES.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 2722 9894 2704 9873 2674 9923 2676 9924
      2679 9924 2682 9926 2685 9927 2686 9929
      2687 9932 2688 9933 2690 9932 2692 9933
      2693 9938

$$

69

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 21, 12:38 AM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	82 min
Aug 21, 12:53 AM CDT	Special Weather Statement	BRO	Jim Hogg	37 min
Aug 21, 2:01 AM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	89 min
Aug 21, 3:41 AM CDT	Special Weather Statement	BRO	Zapata	34 min
Aug 21, 4:41 AM CDT	Flash Flood Warning	BRO	Zapata	2 hr
Aug 21, 4:56 AM CDT	Flash Flood Watch	BRO	Brooks, Jim Hogg, Zapata	10 hr
Aug 21, 6:45 AM CDT	Areal Flood Advisory	BRO	Zapata	90 min
Aug 21, 7:47 AM CDT	Flash Flood Warning	BRO	Jim Hogg, Zapata	88 min
Aug 21, 8:21 AM CDT	Areal Flood Advisory	BRO	Jim Hogg	84 min
Aug 21, 9:03 AM CDT	Areal Flood Advisory	BRO	Zapata	57 min
Aug 21, 4:01 PM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	119 min
Aug 21, 4:20 PM CDT	Special Weather Statement	BRO	Starr	55 min
Aug 21, 4:36 PM CDT	Areal Flood Advisory	BRO	Starr	114 min
Aug 21, 5:11 PM CDT	Areal Flood Advisory	BRO	Zapata	2 hr
Aug 21, 5:27 PM CDT	Special Weather Statement	BRO	Kenedy	48 min
Aug 21, 5:30 PM CDT	Special Weather Statement	BRO	Brooks	45 min
Aug 21, 5:56 PM CDT	Areal Flood Advisory	BRO	Zapata	94 min
Aug 21, 6:05 PM CDT	Special Weather Statement	BRO	Kenedy	40 min

Nearby

Flash Flood Warnings in Texas, 2016 Every flash flood warning in 2016

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.