Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 2, NWS Brownsville, TX

February 19, 2017Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Feb 19, 2017, 8:14 PM CST for Zapata County, Texas. It was in force for 46 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
Feb 19, 2017, 8:14 PM CST (02:14 UTC)
Expired
Feb 19, 2017, 9:00 PM CST
In force
46 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 196 km from the middle of the area, began a volume at 02:14 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

Corpus Christi, TX (KCRP), launched 00:00Z, 2.2 hours before the alert went out and 209 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, Corpus Christi, TX at 00:00Z on 2017-02-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1800 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2017-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.1939587897Sfc1 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
1800 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.4
Supercell composite
9.8

Open this sounding in Storm Lab

The text

As transmitted.

850 
WUUS54 KBRO 200214
SVRBRO
TXC505-200300-
/O.NEW.KBRO.SV.W.0002.170220T0214Z-170220T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
814 PM CST SUN FEB 19 2017

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Northern Zapata County in Deep South Texas...

* Until 900 PM CST

* At 813 PM CST, severe thunderstorms were located along a line
  extending from 6 miles southeast of Rio Bravo to 8 miles southwest
  of Falcon Mesa, moving northeast 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...
  Zapata, Bustamante, Medina, Siesta Shores, Las Palmas and Falcon 
  Mesa.

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 these storms. 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 2732 9937 2727 9933 2727 9905 2706 9905
      2682 9926 2686 9928 2687 9932 2688 9933
      2692 9932 2694 9939 2696 9939 2698 9938
      2702 9942 2729 9942
TIME...MOT...LOC 0213Z 214DEG 33KT 2731 9938 2679 9938 

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

JMS
1 follow-up statement
963 
WWUS54 KBRO 200239
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
839 PM CST SUN FEB 19 2017

TXC505-200300-
/O.CON.KBRO.SV.W.0002.000000T0000Z-170220T0300Z/
Zapata TX-
839 PM CST SUN FEB 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CST
FOR NORTHERN ZAPATA COUNTY...

At 838 PM CST, severe thunderstorms were located along a line 
extending from NEAR Laredo Ranchettes to Zapata, moving northeast 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...
Zapata, Bustamante, Medina, Las Palmas and Falcon Mesa.

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 these storms.
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 2727 9905 2706 9905 2682 9926 2686 9928
      2687 9932 2688 9933 2692 9932 2694 9939
      2696 9939 2698 9938 2704 9933 2727 9926
TIME...MOT...LOC 0238Z 214DEG 33KT 2750 9924 2698 9924 

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

JMS

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 19, 6:25 PM CSTSmall Craft AdvisoryBRO12 hr
Feb 19, 7:38 PM CSTSpecial Weather StatementBROZapata52 min
Feb 19, 7:51 PM CSTSevere Thunderstorm WarningBROZapata24 min
Feb 19, 8:25 PM CSTFlash Flood WarningBROZapata95 min
Feb 19, 9:01 PM CSTSpecial Weather StatementBROZapata44 min
Feb 20, 12:02 AM CSTSpecial Weather StatementBROZapata28 min
Feb 20, 12:24 AM CSTSpecial Weather StatementBROZapata36 min
Feb 20, 1:12 AM CSTSpecial Weather StatementBROZapata48 min
Feb 20, 1:40 AM CSTSpecial Weather StatementBROJim Hogg, Starr50 min
Feb 20, 1:43 AM CSTSpecial Weather StatementBROStarr47 min
Feb 20, 1:46 AM CSTSpecial Weather StatementBROJim Hogg29 min
Feb 20, 2:28 AM CSTSpecial Weather StatementBROStarr47 min
Feb 20, 2:44 AM CSTSpecial Weather StatementBROStarr31 min
Feb 20, 3:29 AM CSTSpecial Weather StatementBROBrooks46 min
Feb 20, 3:43 AM CSTSpecial Weather StatementBROHidalgo32 min
Feb 20, 4:07 AM CSTSpecial Weather StatementBROKenedy38 min
Feb 20, 8:24 AM CSTSpecial Marine WarningBRO66 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.