Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 39, NWS Brownsville, TX

May 21, 2017Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 21, 2017, 8:27 PM CDT for Hidalgo County, Starr County, Texas. It was in force for 40 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 21, 2017, 8:27 PM CDT (01:27 UTC)
Expired
May 21, 2017, 9:07 PM CDT
In force
40 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Hidalgo County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 128 km from the middle of the area, began a volume at 01:29 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 1.5 hours before the alert went out and 131 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-pSkew-T log-p diagram, Brownsville Intl, TX at 00:00Z on 2017-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2410 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 00:00Z on 2017-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2410 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.9

Open this sounding in Storm Lab

The text

As transmitted.

544 
WUUS54 KBRO 220127
SVRBRO
TXC215-427-220230-
/O.NEW.KBRO.SV.W.0039.170522T0127Z-170522T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
827 PM CDT SUN MAY 21 2017

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Southwestern Hidalgo County in Deep South Texas...
  Central Starr County in Deep South Texas...

* Until 930 PM CDT

* At 826 PM CDT, a severe thunderstorm was located OVER Fort Ringgold
  County Park, or OVER Rio Grande City, moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...HAIL DAMAGE TO VEHICLES...INCLUDING CRACKED WINDSHIELDS 
           AND MINOR EXTERIOR DENTS CAN EXPECTED. SOME DAMAGE TO 
           CROPS AND TREES IS EXPECTED. EXPECT MINOR WIND DAMAGE TO 
           MOBILE HOMES...SOME ROOFS...SIDING AND SOME FENCES. TREE 
           LIMBS WILL BLOW DOWN AND SMALL TREES WILL BE UPROOTED. 
           DAMAGE TO POWER LINES AND SOME POWER POLES IS EXPECTED. 

* Locations impacted include...
  Rio Grande City, Penitas, Sullivan City, La Joya, Los Ebanos,
  Garciasville, La Grulla, John F Kennedy Elementary School, La
  Victoria and Fort Ringgold County Park.

This includes US HIGHWAY 83 between MILE MARKERs 820 and 848.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 2623 9845 2622 9848 2620 9848 2625 9856
      2624 9855 2622 9856 2626 9859 2624 9867
      2626 9868 2627 9872 2629 9871 2630 9875
      2631 9874 2633 9875 2633 9879 2637 9880
      2636 9885 2658 9885 2658 9839 2619 9843
TIME...MOT...LOC 0126Z 284DEG 17KT 2641 9880 

HAIL...1.00IN
WIND...60MPH
 
$$

69
2 follow-up statements
740 
WWUS54 KBRO 220146
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
846 PM CDT SUN MAY 21 2017

TXC215-427-220230-
/O.CON.KBRO.SV.W.0039.000000T0000Z-170522T0230Z/
Hidalgo TX-Starr TX-
846 PM CDT SUN MAY 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHWESTERN HIDALGO AND SOUTHEASTERN STARR COUNTIES...

At 846 PM CDT, a severe thunderstorm was located NEAR La Victoria, or
NEAR Garciasville, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...HAIL DAMAGE TO VEHICLES...INCLUDING CRACKED WINDSHIELDS AND 
         MINOR EXTERIOR DENTS CAN EXPECTED. SOME DAMAGE TO CROPS AND 
         TREES IS EXPECTED. EXPECT MINOR WIND DAMAGE TO MOBILE 
         HOMES...SOME ROOFS...SIDING AND SOME FENCES. TREE LIMBS 
         WILL BLOW DOWN AND SMALL TREES WILL BE UPROOTED. DAMAGE TO 
         POWER LINES AND SOME POWER POLES IS EXPECTED. 

Locations impacted include...
Penitas, Sullivan City, La Joya, Los Ebanos, Garciasville, La Grulla,
Jimmy Carter High School, John F Kennedy Elementary School, La
Victoria and Lorenzo De Zavala Middle School.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 2623 9845 2622 9848 2620 9848 2625 9856
      2624 9855 2622 9856 2626 9859 2624 9867
      2626 9868 2627 9872 2629 9871 2630 9875
      2631 9874 2633 9875 2657 9874 2658 9839
      2619 9843
TIME...MOT...LOC 0146Z 282DEG 34KT 2638 9866 

HAIL...1.00IN
WIND...60MPH
 
$$

69
385 
WWUS54 KBRO 220207
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
907 PM CDT SUN MAY 21 2017

TXC215-427-220216-
/O.CAN.KBRO.SV.W.0039.000000T0000Z-170522T0230Z/
Hidalgo TX-Starr TX-
907 PM CDT SUN MAY 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HIDALGO AND
SOUTHEASTERN STARR COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However small hail, gusty winds and heavy rain are
still possible with this thunderstorm.

LAT...LON 2623 9845 2622 9848 2620 9848 2625 9856
      2624 9855 2622 9856 2626 9859 2624 9867
      2626 9868 2627 9872 2629 9871 2630 9875
      2631 9874 2633 9875 2657 9874 2658 9839
      2619 9843
TIME...MOT...LOC 0206Z 284DEG 17KT 2636 9855 

$$

69

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 7:05 PM CDTAreal Flood AdvisoryBROZapata85 min
May 21, 7:11 PM CDTSevere Thunderstorm WarningBROStarr, Zapata64 min
May 21, 7:14 PM CDTFlash Flood WarningBROZapata91 min
May 21, 7:30 PM CDTSevere Thunderstorm WarningBROJim Hogg, Starr60 min
May 21, 7:54 PM CDTSevere Thunderstorm WarningBROZapata36 min
May 21, 7:55 PM CDTAreal Flood AdvisoryBROJim Hogg, Starr, Zapata95 min
May 21, 7:59 PM CDTSevere Thunderstorm WarningBROStarr31 min
May 21, 8:38 PM CDTAreal Flood AdvisoryBROStarr82 min
May 21, 8:51 PM CDTSpecial Weather StatementBROZapata39 min
May 21, 9:06 PM CDTSpecial Weather StatementBROHidalgo39 min
May 21, 9:15 PM CDTAreal Flood AdvisoryBROZapata90 min
May 21, 9:24 PM CDTSpecial Weather StatementBROZapata51 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017Every severe thunderstorm warning in 2017

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.