Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 21, NWS Houston/Galveston, TX

February 14, 2017Brazoria County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Feb 14, 2017, 9:24 AM CST for Brazoria County, Texas. It was in force for 36 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, 9:24 AM CST (15:24 UTC)
Expired
Feb 14, 2017, 10:00 AM CST
In force
36 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Brazoria County, TX

The radar

The Houston radar (KHGX), 33 km from the middle of the area, began a volume at 15:27 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, 3.4 hours before the alert went out and 212 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.

347 
WFUS54 KHGX 141524
TORHGX
TXC039-141600-
/O.NEW.KHGX.TO.W.0021.170214T1524Z-170214T1600Z/

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

The National Weather Service in League City has issued a

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

* Until 1000 AM CST.

* At 924 AM CST, a severe thunderstorm capable of producing a tornado
  was located near Angleton, moving east 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...
  Angleton and Danbury. 

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 9545 2934 9515 2920 9506 2921 9504
      2924 9501 2919 9499 2919 9501 2918 9501
      2916 9503 2915 9502 2918 9498 2913 9496
      2912 9506 2915 9503 2916 9504 2912 9510
      2910 9542
TIME...MOT...LOC 1524Z 248DEG 29KT 2914 9538 

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

$$
3 follow-up statements
807 
WWUS54 KHGX 141533
SVSHGX

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

TXC039-141600-
/O.CON.KHGX.TO.W.0021.000000T0000Z-170214T1600Z/
Brazoria TX-
933 AM CST TUE FEB 14 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM CST FOR EAST
CENTRAL BRAZORIA COUNTY...
    
At 931 AM CST, a severe thunderstorm capable of producing a tornado
was located 5 miles south of Danbury, moving east 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. 

This tornadic thunderstorm will remain over mainly rural areas of
east central Brazoria County.

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 2912 9534 2919 9537 2934 9515 2920 9506
      2921 9504 2924 9501 2919 9499 2919 9501
      2917 9502 2916 9503 2915 9502 2918 9498
      2913 9496 2912 9506 2915 9503 2916 9504
      2912 9510
TIME...MOT...LOC 1531Z 248DEG 29KT 2916 9531 

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

$$
051 
WWUS54 KHGX 141544
SVSHGX

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

TXC039-141600-
/O.CON.KHGX.TO.W.0021.000000T0000Z-170214T1600Z/
Brazoria TX-
944 AM CST TUE FEB 14 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM CST FOR EAST
CENTRAL BRAZORIA COUNTY...
    
At 944 AM CST, a severe thunderstorm capable of producing a tornado
was located 8 miles southeast of Liverpool, or 13 miles southwest of
Hitchcock, moving east 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. 

This tornadic thunderstorm will remain over mainly rural areas of
east central Brazoria County.

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 2916 9522 2923 9530 2934 9515 2921 9507
TIME...MOT...LOC 1544Z 248DEG 29KT 2920 9519 

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

$$
232 
WWUS54 KHGX 141555
SVSHGX

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

TXC039-141603-
/O.EXP.KHGX.TO.W.0021.000000T0000Z-170214T1600Z/
Brazoria TX-
955 AM CST TUE FEB 14 2017

...THE TORNADO WARNING FOR EAST CENTRAL BRAZORIA COUNTY WILL EXPIRE
AT 1000 AM CST...
                
The storm which prompted the warning is no longer showing
significant rotation. However strong winds are still possible and
the area remains under a Severe Thunderstorm Warning.

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

Remember, a Severe Thunderstorm Warning still remains in effect.

LAT...LON 2916 9522 2923 9530 2934 9515 2921 9507
TIME...MOT...LOC 1553Z 248DEG 29KT 2922 9513 

$$

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, 9:35 AM CSTAreal Flood AdvisoryHGXHarris, Liberty115 min
Feb 14, 9:43 AM CSTSevere Thunderstorm WarningHGXLiberty, Polk47 min
Feb 14, 9:56 AM CSTTornado WarningHGXBrazoria, Galveston34 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.