Alert archive / Texas / Tornado Warnings in 2015

Tornado Warning 3, NWS Brownsville, TX

April 17, 2015Starr County, Texas

NWS Brownsville, TX issued this tornado warning at Apr 17, 2015, 9:40 PM CDT for Starr County, Texas. It was in force for 35 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
Apr 17, 2015, 9:40 PM CDT (02:40 UTC)
Expired
Apr 17, 2015, 10:15 PM CDT
In force
35 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

County Starr County, TX

The radar

The Brownsville radar (KBRO), 167 km from the middle of the area, began a volume at 02:41 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.

IssuedProductOfficeLasted
Apr 17, 6:57 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 2.7 hours before the alert went out and 170 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 2015-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2494 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 2015-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
2494 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

710 
WFUS54 KBRO 180240
TORBRO
TXC427-180315-
/O.NEW.KBRO.TO.W.0003.150418T0240Z-150418T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
940 PM CDT FRI APR 17 2015

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN STARR COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 1015 PM CDT
    
* AT 939 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 8
  MILES EAST OF NEW FALCON...OR 9 MILES WEST OF VIBORAS...AND MOVING
  EAST AT 55 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  EL SAUZ AROUND 945 PM CDT.
  VIBORAS AROUND 950 PM CDT.
  SANTA CATARINA AROUND 1005 PM CDT.
  LA GLORIA AROUND 1010 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DIAMOND O RANCH AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 2668 9901 2676 9897 2679 9875 2678 9853
      2654 9853 2657 9906 2664 9906
TIME...MOT...LOC 0239Z 267DEG 49KT 2667 9897 

$$

SCHOLL
2 follow-up statements
558 
WWUS54 KBRO 180302 RRA
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1002 PM CDT FRI APR 17 2015

TXC427-180315-
/O.CON.KBRO.TO.W.0003.000000T0000Z-150418T0315Z/
STARR TX-
1002 PM CDT FRI APR 17 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR NORTH
CENTRAL STARR COUNTY...
    
AT 1002 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
VIBORAS...MOVING EAST AT 45 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  SANTA CATARINA AND LA GLORIA AROUND 1015 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DIAMOND O RANCH AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 2667 9893 2677 9886 2679 9875 2678 9853
      2654 9853 2656 9895 2664 9894
TIME...MOT...LOC 0302Z 265DEG 38KT 2668 9875 

$$

SCHOLL
747 
WWUS54 KBRO 180308
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1008 PM CDT FRI APR 17 2015

TXC427-180316-
/O.EXP.KBRO.TO.W.0003.000000T0000Z-150418T0315Z/
STARR TX-
1008 PM CDT FRI APR 17 2015

...THE TORNADO WARNING FOR NORTH CENTRAL STARR COUNTY WILL EXPIRE AT
1015 PM CDT...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY
AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
STARR COUNTY TILL 1045 PM.

LAT...LON 2667 9893 2677 9886 2679 9875 2678 9853
      2654 9853 2656 9895 2664 9894
TIME...MOT...LOC 0304Z 267DEG 49KT 2668 9875 

$$

SCHOLL

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 9:02 PM CDTSevere Thunderstorm WarningBROStarr, Zapata58 min
Apr 17, 9:23 PM CDTTornado WarningBROStarr, Zapata22 min
Apr 17, 9:50 PM CDTAreal Flood AdvisoryBROJim Hogg, Starr, Zapata115 min
Apr 17, 9:52 PM CDTSevere Thunderstorm WarningBROJim Hogg, Starr, Zapata53 min
Apr 17, 10:08 PM CDTSpecial Weather StatementBROJim Hogg37 min
Apr 17, 10:14 PM CDTSevere Thunderstorm WarningBROJim Hogg30 min
Apr 17, 10:28 PM CDTAreal Flood AdvisoryBROBrooks, Jim Hogg2 hr
Apr 17, 10:37 PM CDTSevere Thunderstorm WarningBROBrooks, Hidalgo, Jim Hogg, Starr23 min
Apr 17, 11:01 PM CDTSevere Thunderstorm WarningBROBrooks, Hidalgo, Kenedy29 min
Apr 17, 11:07 PM CDTSpecial Weather StatementBROKenedy38 min
Apr 17, 11:10 PM CDTSpecial Marine WarningBRO95 min
Apr 17, 11:43 PM CDTSpecial Weather StatementBROKenedy47 min
Apr 18, 8:32 AM CDTAreal Flood AdvisoryBROZapata118 min

Nearby

Tornado Warnings in Texas, 2015Every tornado warning in 2015Tornadoes in 2015

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.