Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 22, NWS Houston/Galveston, TX

February 14, 2017Brazoria County, Galveston County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Feb 14, 2017, 9:56 AM CST for Brazoria County, Galveston County, Texas. It was in force for 34 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 14, 2017, 9:56 AM CST (15:56 UTC)
Expired
Feb 14, 2017, 10:30 AM CST
In force
34 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Brazoria County, TX, Galveston County, TX

The radar

The Houston radar (KHGX), 35 km from the middle of the area, began a volume at 15:57 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
Feb 14, 5:09 AM CSTTornado WatchSPC6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.9 hours before the alert went out and 207 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, Lake Charles Mun, LA at 12:00Z on 2017-02-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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, Lake Charles Mun, LA at 12:00Z on 2017-02-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
22 J/kg
Mixed-layer CIN
-294 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

831 
WFUS54 KHGX 141556
TORHGX
TXC039-167-141630-
/O.NEW.KHGX.TO.W.0022.170214T1556Z-170214T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
956 AM CST TUE FEB 14 2017

The National Weather Service in League City has issued a

* Tornado Warning for...
  Southwestern Galveston County in southeastern Texas...
  East central Brazoria County in southeastern Texas...

* Until 1030 AM CST.

* At 956 AM CST, a severe thunderstorm capable of producing a tornado
  was located over San Luis Pass, or 12 miles northeast of Surfside
  Beach, moving northeast at 35 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...
  Galveston Island West End, Galveston Causeway, Texas City, La
  Marque, Hitchcock, Bayou Vista, Jamaica Beach, Tiki Island,
  Galveston Pleasure Pier, Schlitterbahn, Galveston State Park, San
  Luis Pass, Scholes Field, Moody Gardens, Offatts Bayou and Pelican
  Island.

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 2902 9512 2907 9520 2943 9499 2927 9475
TIME...MOT...LOC 1556Z 217DEG 32KT 2907 9513 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
2 follow-up statements
897 
WWUS54 KHGX 141607
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
1007 AM CST TUE FEB 14 2017

TXC039-167-141630-
/O.CON.KHGX.TO.W.0022.000000T0000Z-170214T1630Z/
Galveston TX-Brazoria TX-
1007 AM CST TUE FEB 14 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR
SOUTHWESTERN GALVESTON AND EAST CENTRAL BRAZORIA COUNTIES...
    
At 1007 AM CST, a severe thunderstorm capable of producing a tornado
was located near Jamaica Beach, or 11 miles south of Hitchcock,
moving northeast at 35 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...
Galveston Island West End, Galveston Causeway, Texas City, La Marque,
Hitchcock, Bayou Vista, Jamaica Beach, Tiki Island, Galveston
Pleasure Pier, Schlitterbahn, Galveston State Park, Scholes Field,
Moody Gardens, Offatts Bayou and Pelican Island.

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 2927 9475 2910 9507 2913 9511 2943 9499
TIME...MOT...LOC 1607Z 217DEG 32KT 2915 9506 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
372 
WWUS54 KHGX 141622
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
1022 AM CST TUE FEB 14 2017

TXC039-167-141630-
/O.EXP.KHGX.TO.W.0022.000000T0000Z-170214T1630Z/
Galveston TX-Brazoria TX-
1022 AM CST TUE FEB 14 2017

...THE TORNADO WARNING FOR SOUTHWESTERN GALVESTON AND EAST CENTRAL
BRAZORIA COUNTIES WILL EXPIRE AT 1030 AM CST...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, damaging winds remain likely and a Severe
Thunderstorm Warning remains in effect for the area.

A tornado watch remains in effect until 100 PM CST for southeastern
Texas.

LAT...LON 2927 9475 2910 9507 2913 9511 2943 9499
TIME...MOT...LOC 1620Z 217DEG 32KT 2919 9503 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 13, 9:35 PM CSTMarine Dense Fog AdvisoryHGX6 hr
Feb 14, 3:47 AM CSTSmall Craft AdvisoryHGX12 hr
Feb 14, 5:55 AM CSTSpecial Weather StatementHGXAustin, Colorado50 min
Feb 14, 6:28 AM CSTSevere Thunderstorm WarningHGXColorado, Jackson, Matagorda, Wharton62 min
Feb 14, 6:42 AM CSTSevere Thunderstorm WarningHGXAustin, Brazos, Burleson, Colorado, Grimes, Waller and 1 more48 min
Feb 14, 6:45 AM CSTTornado WarningHGXColorado, Jackson, Wharton45 min
Feb 14, 6:56 AM CSTAreal Flood AdvisoryHGXColorado, Jackson, Wharton3 hr
Feb 14, 7:25 AM CSTSevere Thunderstorm WarningHGXAustin, Brazoria, Colorado, Fort Bend, Jackson, Matagorda and 1 more65 min
Feb 14, 7:28 AM CSTSpecial Weather StatementHGXGrimes, Montgomery, Waller62 min
Feb 14, 7:29 AM CSTTornado WarningHGXBrazoria, Fort Bend, Matagorda, Wharton31 min
Feb 14, 7:31 AM CSTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Jackson, Wharton3 hr
Feb 14, 7:39 AM CSTTornado WarningHGXAustin, Fort Bend, Wharton36 min
Feb 14, 7:55 AM CSTTornado WarningHGXBrazoria, Fort Bend, Harris, Wharton50 min
Feb 14, 7:59 AM CSTSpecial Marine WarningHGX2 hr
Feb 14, 8:16 AM CSTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Harris, Montgomery, Walker44 min
Feb 14, 8:21 AM CSTSevere Thunderstorm WarningHGXHarris, Houston, Liberty, Madison, Montgomery, Polk and 3 more54 min
Feb 14, 8:30 AM CSTAreal Flood AdvisoryHGXAustin, Brazoria, Colorado, Fort Bend, Galveston, Harris and 3 more2 hr
Feb 14, 8:35 AM CSTSpecial Marine WarningHGX115 min
Feb 14, 8:37 AM CSTTornado WarningHGXBrazoria, Fort Bend, Galveston, Harris38 min
Feb 14, 8:42 AM CSTTornado WarningHGXBrazoria, Galveston, Matagorda33 min
Feb 14, 8:45 AM CSTSevere Thunderstorm WarningHGXBrazoria, Galveston, Matagorda30 min
Feb 14, 8:56 AM CSTSevere Thunderstorm WarningHGXBrazoria, Chambers, Galveston, Harris, Liberty, Montgomery and 1 more64 min
Feb 14, 8:58 AM CSTSevere Thunderstorm WarningHGXHouston, Liberty, Montgomery, Polk, San Jacinto, Trinity47 min
Feb 14, 9:09 AM CSTTornado WarningHGXChambers, Harris, Liberty30 min
Feb 14, 9:13 AM CSTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Harris32 min
Feb 14, 9:21 AM CSTSevere Thunderstorm WarningHGXBrazoria, Galveston, Matagorda39 min
Feb 14, 9:24 AM CSTTornado WarningHGXBrazoria36 min
Feb 14, 9:35 AM CSTAreal Flood AdvisoryHGXHarris, Liberty115 min
Feb 14, 9:43 AM CSTSevere Thunderstorm WarningHGXLiberty, Polk47 min
Feb 14, 9:57 AM CSTSevere Thunderstorm WarningHGXChambers, Galveston, Harris, Liberty, Polk63 min
Feb 14, 10:22 AM CSTSevere Thunderstorm WarningHGXChambers, Galveston53 min
Feb 14, 10:28 AM CSTSpecial Marine WarningHGX2 hr
Feb 14, 3:51 PM CSTSmall Craft AdvisoryHGX20 hr

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.