Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 67, NWS Houston/Galveston, TX

August 25, 20174 counties in Texas

NWS Houston/Galveston, TX issued this tornado warning at Aug 25, 2017, 6:13 PM CDT for 4 counties in 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
Aug 25, 2017, 6:13 PM CDT (23:13 UTC)
Expired
Aug 25, 2017, 6:45 PM CDT
In force
32 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Brazoria County, TX, Fort Bend County, TX, Matagorda County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 60 km from the middle of the area, began a volume at 23:14 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 watch it was issued in

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

IssuedProductOfficeLasted
Aug 25, 2:02 PM CDTTornado WatchSPC12 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 11.2 hours before the alert went out and 236 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 12:00Z on 2017-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 298 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 12:00Z on 2017-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.193958Sfc1 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
298 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

313 
WFUS54 KHGX 252313
TORHGX
TXC039-157-321-481-252345-
/O.NEW.KHGX.TO.W.0067.170825T2313Z-170825T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
613 PM CDT FRI AUG 25 2017

The National Weather Service in League City has issued a

* Tornado Warning for...
  East central Wharton County in southeastern Texas...
  South central Fort Bend County in southeastern Texas...
  West central Brazoria County in southeastern Texas...
  Northeastern Matagorda County in southeastern Texas...

* Until 645 PM CDT.

* At 612 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Bailey's Prairie, or near West Columbia, moving 
  northwest at 40 mph. Another severe thunderstorm capable of 
  producing a tornado was located near West Columbia, moving 
  northwest at 40 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Northwestern Angleton, West Columbia, Needville, Holiday Lakes,
  Pleak, Fairchilds, Bailey's Prairie, Boling-Iago and Damon.

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 outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 2917 9542 2905 9552 2929 9600 2951 9581
TIME...MOT...LOC 2312Z 128DEG 34KT 2916 9554 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

40
2 follow-up statements
613 
WWUS54 KHGX 252328
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
628 PM CDT FRI AUG 25 2017

TXC039-157-321-481-252345-
/O.CON.KHGX.TO.W.0067.000000T0000Z-170825T2345Z/
Wharton TX-Fort Bend TX-Brazoria TX-Matagorda TX-
628 PM CDT FRI AUG 25 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR EAST
CENTRAL WHARTON...SOUTH CENTRAL FORT BEND...WEST CENTRAL BRAZORIA AND
NORTHEASTERN MATAGORDA COUNTIES...
    
At 626 PM CDT, a severe thunderstorm capable of producing a tornado
was located near West Columbia, moving northwest at 40 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Northwestern Angleton, West Columbia, Needville, Holiday Lakes,
Pleak, Fairchilds, Bailey's Prairie, Boling-Iago and Damon.

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 outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 2917 9542 2905 9552 2929 9600 2951 9581
TIME...MOT...LOC 2326Z 123DEG 33KT 2923 9566 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

40
601 
WWUS54 KHGX 252347
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
647 PM CDT FRI AUG 25 2017

TXC039-157-321-481-252357-
/O.EXP.KHGX.TO.W.0067.000000T0000Z-170825T2345Z/
Wharton TX-Fort Bend TX-Brazoria TX-Matagorda TX-
647 PM CDT FRI AUG 25 2017

...THE TORNADO WARNING FOR EAST CENTRAL WHARTON...SOUTH CENTRAL FORT
BEND...WEST CENTRAL BRAZORIA AND NORTHEASTERN MATAGORDA COUNTIES HAS
EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been allowed to expire.

A tornado watch remains in effect until 200 AM CDT for southeastern
Texas.

LAT...LON 2917 9542 2905 9552 2929 9600 2951 9581
TIME...MOT...LOC 2347Z 128DEG 34KT 2933 9580 

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 3:27 AM CDTSpecial Marine WarningHGX63 min
Aug 25, 4:01 AM CDTSpecial Marine WarningHGX89 min
Aug 25, 9:24 AM CDTSpecial Marine WarningHGX66 min
Aug 25, 10:15 AM CDTSpecial Marine WarningHGX60 min
Aug 25, 10:43 AM CDTTornado WarningHGXMatagorda13 min
Aug 25, 11:09 AM CDTSpecial Marine WarningHGX66 min
Aug 25, 11:16 AM CDTSpecial Marine WarningHGX59 min
Aug 25, 11:22 AM CDTTornado WarningHGXMatagorda13 min
Aug 25, 12:23 PM CDTSpecial Marine WarningHGX67 min
Aug 25, 12:53 PM CDTSpecial Marine WarningHGX37 min
Aug 25, 12:58 PM CDTAreal Flood AdvisoryHGXMatagorda3 hr
Aug 25, 1:47 PM CDTSpecial Marine WarningHGX28 min
Aug 25, 1:48 PM CDTTornado WarningHGXGalveston27 min
Aug 25, 2:02 PM CDTSpecial Marine WarningHGX28 min
Aug 25, 2:08 PM CDTTornado WarningHGXBrazoria, Matagorda37 min
Aug 25, 2:14 PM CDTTornado WarningHGXGalveston31 min
Aug 25, 2:29 PM CDTSpecial Marine WarningHGX16 min
Aug 25, 2:41 PM CDTTornado WarningHGXGalveston19 min
Aug 25, 2:42 PM CDTSpecial Marine WarningHGX33 min
Aug 25, 2:44 PM CDTSpecial Marine WarningHGX31 min
Aug 25, 2:44 PM CDTTornado WarningHGXGalveston11 min
Aug 25, 3:03 PM CDTSpecial Marine WarningHGX27 min
Aug 25, 3:03 PM CDTTornado WarningHGXBrazoria27 min
Aug 25, 3:09 PM CDTTornado WarningHGXBrazoria36 min
Aug 25, 3:13 PM CDTSpecial Marine WarningHGX32 min
Aug 25, 3:23 PM CDTSpecial Marine WarningHGX37 min
Aug 25, 3:27 PM CDTTornado WarningHGXMatagorda21 min
Aug 25, 3:42 PM CDTTornado WarningHGXGalveston33 min
Aug 25, 3:48 PM CDTTornado WarningHGXBrazoria, Fort Bend, Matagorda, Wharton27 min
Aug 25, 3:54 PM CDTSpecial Marine WarningHGX36 min
Aug 25, 4:07 PM CDTTornado WarningHGXBrazoria, Galveston23 min
Aug 25, 4:37 PM CDTAreal Flood AdvisoryHGXBrazoria, Galveston113 min
Aug 25, 5:19 PM CDTTornado WarningHGXBrazoria, Matagorda, Wharton26 min
Aug 25, 5:23 PM CDTSpecial Marine WarningHGX52 min
Aug 25, 5:26 PM CDTSpecial Marine WarningHGX34 min
Aug 25, 5:31 PM CDTTornado WarningHGXBrazoria, Fort Bend, Matagorda, Wharton14 min
Aug 25, 5:42 PM CDTTornado WarningHGXBrazoria, Fort Bend, Matagorda, Wharton33 min
Aug 25, 5:45 PM CDTTornado WarningHGXBrazoria30 min
Aug 25, 6:07 PM CDTSpecial Marine WarningHGX23 min
Aug 25, 6:08 PM CDTSpecial Marine WarningHGX37 min
Aug 25, 6:08 PM CDTTornado WarningHGXBrazoria, Fort Bend, Matagorda, Wharton26 min
Aug 25, 6:11 PM CDTSpecial Marine WarningHGX49 min
Aug 25, 6:35 PM CDTTornado WarningHGXBrazoria, Fort Bend25 min
Aug 25, 6:39 PM CDTTornado WarningHGXBrazoria, Galveston36 min
Aug 25, 6:50 PM CDTSpecial Marine WarningHGX25 min
Aug 25, 6:53 PM CDTTornado WarningHGXBrazoria, Galveston22 min
Aug 25, 6:59 PM CDTSpecial Marine WarningHGX61 min

Nearby

Tornado Warnings in Texas, 2017Every tornado warning in 2017Tornadoes 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.