Alert archive / Texas / Tornado Warnings in 2018

Tornado Warning 2, NWS Houston/Galveston, TX

March 29, 2018Brazoria County, Fort Bend County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Mar 29, 2018, 2:13 AM CDT for Brazoria County, Fort Bend County, Texas. It was in force for 17 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 29, 2018, 2:13 AM CDT (07:13 UTC)
Expired
Mar 29, 2018, 2:30 AM CDT
In force
17 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Brazoria County, TX, Fort Bend County, TX

The radar

The Houston radar (KHGX), 27 km from the middle of the area, began a volume at 07:16 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.

What was reported inside it

TimeReportWhereRemark
Mar 29, 2:14 AM CDTTSTM WND DMG3 Ssw Iowa Colony, TXPOSSIBLE TORNADO DAMAGE
Mar 29, 2:16 AM CDTTORNADO3 Ssw Iowa Colony, TXBRIEF EF-0 TORNADO. VERY LOCALIZED FENCE DAMAGE WITH LOFTED DEBRIS TO NEAR 300 FEET.
Mar 29, 2:35 AM CDTTSTM WND DMGAlvin, TXHUGE TREE LIMB BROKEN OFF OF AN OAK TREE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 7.2 hours before the alert went out and 222 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 00:00Z on 2018-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1263 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2018-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.1939587897117Sfc1 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
1263 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
1.6
Supercell composite
9.7

Open this sounding in Storm Lab

The text

As transmitted.

566 
WFUS54 KHGX 290713
TORHGX
TXC039-157-290730-
/O.NEW.KHGX.TO.W.0002.180329T0713Z-180329T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
213 AM CDT THU MAR 29 2018

The National Weather Service in League City has issued a

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

* Until 230 AM CDT.
    
* At 213 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Iowa Colony, or 7 miles southwest of Manvel,
  moving east at 25 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 dangerous storm will be near...
  Hillcrest and Liverpool around 230 AM CDT.

Other locations impacted by this tornadic thunderstorm include
Chocolate Bayou, Juliff and Rosharon.

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 2937 9552 2947 9550 2947 9523 2946 9523
      2939 9519 2927 9521
TIME...MOT...LOC 0713Z 284DEG 24KT 2942 9547 

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

$$
11

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 7:29 PM CDTRiver Flood WarningHGXPolk, San Jacinto35 hr
Mar 28, 7:58 PM CDTSpecial Weather StatementHGXBrazos47 min
Mar 28, 8:30 PM CDTAreal Flood AdvisoryHGXBrazos, Burleson, Grimes3 hr
Mar 28, 8:32 PM CDTSpecial Weather StatementHGXMadison28 min
Mar 28, 8:35 PM CDTRiver Flood WarningHGXChambers, Liberty9 days
Mar 28, 8:35 PM CDTRiver Flood WarningHGXChambers, Liberty11 days
Mar 28, 8:35 PM CDTRiver Flood WarningHGXMadison, Walker48 hr
Mar 28, 8:35 PM CDTRiver Flood WarningHGXHardin, Liberty, Polk3 days
Mar 28, 8:35 PM CDTRiver Flood WarningHGXBurleson, Washington37 hr
Mar 28, 8:57 PM CDTSpecial Weather StatementHGXHouston48 min
Mar 28, 9:18 PM CDTFlash Flood WarningHGXBrazos, Burleson, Grimes, Washington3 hr
Mar 28, 9:49 PM CDTSpecial Weather StatementHGXGrimes, Walker41 min
Mar 28, 10:02 PM CDTFlash Flood WarningHGXGrimes, Houston, Madison, Montgomery, Trinity, Walker3 hr
Mar 28, 10:09 PM CDTAreal Flood AdvisoryHGXHouston, Polk, San Jacinto, Trinity3 hr
Mar 28, 11:02 PM CDTSpecial Weather StatementHGXMatagorda43 min
Mar 28, 11:17 PM CDTSpecial Weather StatementHGXBrazos, Burleson43 min
Mar 28, 11:33 PM CDTFlash Flood WarningHGXHouston, Polk, San Jacinto, Trinity3 hr
Mar 28, 11:46 PM CDTSpecial Weather StatementHGXBrazoria44 min
Mar 29, 12:04 AM CDTFlash Flood WarningHGXAustin, Brazos, Burleson, Grimes, Houston, Madison and 4 more3 hr
Mar 29, 12:49 AM CDTSpecial Weather StatementHGXJackson, Wharton41 min
Mar 29, 1:03 AM CDTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Grimes, Harris, Liberty and 6 more3 hr
Mar 29, 1:06 AM CDTSevere Thunderstorm WarningHGXColorado, Fort Bend, Jackson, Wharton39 min
Mar 29, 1:16 AM CDTRiver Flood WarningHGXWaller32 hr
Mar 29, 1:21 AM CDTAreal Flood AdvisoryHGXJackson, Wharton3 hr
Mar 29, 1:21 AM CDTRiver Flood WarningHGXHarris, Waller24 hr
Mar 29, 1:27 AM CDTSpecial Marine WarningHGX93 min
Mar 29, 1:40 AM CDTFlash Flood WarningHGXMontgomery, Polk, San Jacinto, Trinity, Walker5 hr
Mar 29, 1:46 AM CDTSpecial Weather StatementHGXBrazoria, Matagorda59 min
Mar 29, 1:52 AM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Jackson, Matagorda, Wharton38 min
Mar 29, 1:58 AM CDTSpecial Marine WarningHGX2 hr
Mar 29, 2:04 AM CDTSpecial Weather StatementHGXChambers, Harris, Liberty56 min
Mar 29, 2:08 AM CDTAreal Flood AdvisoryHGXBrazoria, Chambers, Fort Bend, Galveston, Harris, Liberty3 hr
Mar 29, 2:09 AM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Jackson, Matagorda, Wharton3 hr
Mar 29, 2:28 AM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Galveston, Harris, Matagorda32 min
Mar 29, 2:39 AM CDTRiver Flood WarningHGXLiberty, Polk, San Jacinto3 days
Mar 29, 2:51 AM CDTSevere Thunderstorm WarningHGXChambers, Galveston, Harris, Liberty39 min
Mar 29, 2:53 AM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston, Harris, Matagorda39 min
Mar 29, 2:56 AM CDTTornado WarningHGXGalveston19 min
Mar 29, 3:01 AM CDTAreal Flood AdvisoryHGXBrazoria, Galveston, Harris, Matagorda119 min
Mar 29, 3:12 AM CDTTornado WarningHGXGalveston18 min
Mar 29, 3:31 AM CDTSevere Thunderstorm WarningHGXChambers, Galveston14 min
Mar 29, 3:32 AM CDTSpecial Marine WarningHGX58 min
Mar 29, 3:49 AM CDTSpecial Marine WarningHGX56 min
Mar 29, 3:57 AM CDTAreal Flood AdvisoryHGXAustin, Colorado, Fort Bend, Grimes, Harris, Liberty and 6 more3 hr
Mar 29, 4:59 AM CDTSpecial Marine WarningHGX61 min
Mar 29, 5:37 AM CDTRiver Flood WarningHGXMontgomery51 hr
Mar 29, 5:37 AM CDTRiver Flood WarningHGXHarris, Montgomery4 days
Mar 29, 6:53 AM CDTRiver Flood WarningHGXHarris, Liberty, Montgomery5 days
Mar 29, 6:53 AM CDTRiver Flood WarningHGXMontgomery41 hr
Mar 29, 7:24 AM CDTRiver Flood WarningHGXMontgomery61 hr
Mar 29, 9:30 AM CDTRiver Flood WarningHGXHarris24 hr
Mar 29, 9:34 AM CDTRiver Flood WarningHGXLiberty, Polk, San Jacinto57 hr
Mar 29, 4:15 PM CDTSmall Craft AdvisoryHGX6 hr

Nearby

Tornado Warnings in Texas, 2018Every tornado warning in 2018Tornadoes in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.