Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 21, NWS Brownsville, TX

May 18, 2010Cameron County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 18, 2010, 10:13 AM CDT for Cameron County, Texas. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 18, 2010, 10:13 AM CDT (15:13 UTC)
Expired: May 18, 2010, 10:45 AM CDT
In force: 32 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 16 km from the middle of the area, began a volume at 15:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 18, 6:11 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 3.2 hours before the alert went out and 16 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: 3739 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

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

631 
WUUS54 KBRO 181513
SVRBRO
TXC061-181545-
/O.NEW.KBRO.SV.W.0021.100518T1513Z-100518T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1013 AM CDT TUE MAY 18 2010

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CAMERON COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 1045 AM CDT

* AT 1012 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING 60 MPH WINDS...
  OVER SOUTHEASTERN CAMERON COUNTY...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGHWAY 4 AND BOCA CHICA.
  LAGUNA HEIGHTS.

AT 1012 AM CDT...THE PUBLIC ALSO REPORTED WIND GUSTS TO 60 MPH IN 
SAN BENITO AND HARLINGEN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND GUSTS TO 60 MPH OR MORE WILL CAUSE SOME STRUCTURAL 
DAMAGE...MAINLY TO TREES AND POWER LINES. POORLY ANCHORED 
ROOFS...MOBILE HOMES...AND SHEDS ARE ALSO AT RISK.

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 2595 9730 2592 9735 2592 9737 2587 9737
      2584 9740 2584 9741 2624 9742 2624 9735
      2622 9732 2611 9730 2609 9723 2606 9722
      2604 9721 2602 9726 2601 9723 2598 9726
      2600 9721 2597 9720
TIME...MOT...LOC 1512Z 280DEG 31KT 2598 9733

$$

59

1 follow-up statement

017 
WWUS54 KBRO 181541
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1041 AM CDT TUE MAY 18 2010

TXC061-181545-
/O.CON.KBRO.SV.W.0021.000000T0000Z-100518T1545Z/
CAMERON-
1041 AM CDT TUE MAY 18 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR EASTERN CAMERON COUNTY...

AT 1040 AM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 13 MILES SOUTHEAST OF PORT ISABEL...MOVING EAST 
AT 35 MPH. STRONG THUNDERSTORMS REMAIN JUST ALONG THE COAST AND OVER 
THE LAGUNA MADRE BETWEEN PORT ISABEL AND SOUTH PADRE ISLAND.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING... 
EXCESSIVE AND DEADLY CLOUD-TO-GROUND LIGHTNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL.

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 2596 9726 2597 9729 2611 9729 2609 9723
      2606 9722 2604 9721 2602 9726 2601 9723
      2598 9726 2600 9721 2597 9720
TIME...MOT...LOC 1540Z 280DEG 31KT 2594 9707

$$

59

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 4:41 AM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg	94 min
May 18, 5:20 AM CDT	Severe Thunderstorm Warning	BRO	Zapata	55 min
May 18, 6:16 AM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg, Starr, Zapata	59 min
May 18, 7:17 AM CDT	Special Marine Warning	BRO		43 min
May 18, 8:01 AM CDT	Special Marine Warning	BRO		44 min
May 18, 8:04 AM CDT	Areal Flood Advisory	BRO	Brooks	56 min
May 18, 8:29 AM CDT	Tornado Warning	BRO	Hidalgo	20 min
May 18, 8:37 AM CDT	Tornado Warning	BRO	Cameron	17 min
May 18, 8:57 AM CDT	Tornado Warning	BRO	Willacy	33 min
May 18, 9:07 AM CDT	Flash Flood Warning	BRO	Hidalgo	53 min
May 18, 9:20 AM CDT	Severe Thunderstorm Warning	BRO	Cameron, Willacy	55 min
May 18, 9:32 AM CDT	Special Marine Warning	BRO		88 min
May 18, 9:52 AM CDT	Areal Flood Advisory	BRO	Cameron	53 min
May 18, 9:59 AM CDT	Areal Flood Advisory	BRO	Willacy	61 min
May 18, 11:08 AM CDT	Special Marine Warning	BRO		52 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010 Every severe thunderstorm warning in 2010

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.