Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Brownsville, TX

September 2, 2013Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Sep 2, 2013, 6:17 PM CDT for Zapata County, Texas. It was in force for 28 min. 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: Sep 2, 2013, 6:17 PM CDT (23:17 UTC)
Expired: Sep 2, 2013, 6:45 PM CDT
In force: 28 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 203 km from the middle of the area, began a volume at 23:18 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.

What was reported inside it

Time	Report	Where	Remark
Sep 2, 6:18 PM CDT	HAIL 0.88	Zapata, TX	PUBLIC REPORTED NICKEL-SIZE HAIL IN THE CITY OF ZAPATA AT THE INTERSECTION OF LINCOLN AND 5TH STREET.
Sep 2, 6:31 PM CDT	HAIL 1	Zapata, TX	PUBLIC REPORTED QUARTER-SIZE HAIL AT THE INTERSECTION OF LINCOLN AND 5TH IN DOWNTOWN ZAPATA. ALSO REPORTED WINDS OF 65 MPH.

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, 11.3 hours before the alert went out and 215 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: 2012 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -74 m²/s²
0-3 km storm-relative helicity: 14 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.

214 
WUUS54 KBRO 022317
SVRBRO
TXC505-022345-
/O.NEW.KBRO.SV.W.0021.130902T2317Z-130902T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
617 PM CDT MON SEP 2 2013

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL ZAPATA COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 645 PM CDT

* AT 617 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
  DAMAGING 60 MPH WINDS...OVER ZAPATA...MOVING NORTHWEST AT 5 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ZAPATA.
  FALCON MESA.
  LAS PALMAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE WIND SPEEDS STRONG ENOUGH TO BRING
DOWN TREES AND POWER LINES AND DAMAGE OR DESTROY MOBILE HOMES AND
OUTBUILDINGS. PERSONS OUTDOORS OR IN VEHICLES SHOULD SEEK SAFETY
INSIDE A STURDY BUILDING UNTIL THE STORM PASSES. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&

LAT...LON 2706 9937 2693 9913 2677 9922 2678 9925
      2684 9927 2686 9929 2686 9932 2688 9933
      2691 9933 2694 9939 2697 9940 2698 9939
      2700 9941
TIME...MOT...LOC 2317Z 117DEG 6KT 2689 9927

$$

63

2 follow-up statements

509 
WWUS54 KBRO 022339
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
639 PM CDT MON SEP 2 2013

TXC505-022345-
/O.CON.KBRO.SV.W.0021.000000T0000Z-130902T2345Z/
ZAPATA-
639 PM CDT MON SEP 2 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR CENTRAL ZAPATA COUNTY...

AT 631 PM...THE PUBLIC REPORTED QUARTER-SIZE HAIL AND WINDS OF 65 
MPH IN DOWNTOWN ZAPATA. 

AT 636 PM CDT...RADAR INDICATED THE SEVERE THUNDERSTORM NEAR 
ZAPATA...MOVING NORTHWEST AT 5 MPH.

THIS STORM IS CAPABLE OF PRODUCING...
  QUARTER SIZED HAIL.
  DAMAGING WINDS TO 65 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  FALCON MESA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE WIND SPEEDS STRONG ENOUGH TO BRING
DOWN TREES AND POWER LINES AND DAMAGE OR DESTROY MOBILE HOMES AND
OUTBUILDINGS. PERSONS OUTDOORS OR IN VEHICLES SHOULD SEEK SAFETY
INSIDE A STURDY BUILDING UNTIL THE STORM PASSES. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2701 9933 2688 9916 2677 9922 2678 9925
      2684 9927 2686 9929 2686 9932 2688 9933
      2691 9933 2694 9939 2697 9940
TIME...MOT...LOC 2336Z 117DEG 6KT 2690 9930

$$

63

714 
WWUS54 KBRO 022349
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
649 PM CDT MON SEP 2 2013

TXC505-022358-
/O.EXP.KBRO.SV.W.0021.000000T0000Z-130902T2345Z/
ZAPATA-
649 PM CDT MON SEP 2 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ZAPATA COUNTY HAS
EXPIRED...

AT 648 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THE STORMS
THAT PROMPTED THE WARNING HAVE WEAKENED AND WERE NO LONGER SEVERE...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR 
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO 
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

LAT...LON 2701 9933 2688 9916 2677 9922 2678 9925
      2684 9927 2686 9929 2686 9932 2688 9933
      2691 9933 2694 9939 2697 9940
TIME...MOT...LOC 2339Z 117DEG 6KT 2690 9931

$$

63

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 3:06 PM CDT	Areal Flood Advisory	BRO	Cameron, Willacy	54 min
Sep 2, 4:15 PM CDT	Areal Flood Advisory	BRO	Hidalgo	60 min
Sep 2, 5:33 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	57 min
Sep 2, 6:21 PM CDT	Areal Flood Advisory	BRO	Kenedy	54 min
Sep 2, 6:46 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2013 Every severe thunderstorm warning in 2013

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.