Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 27, NWS Houston/Galveston, TX

October 27, 2021Harris County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Oct 27, 2021, 8:16 AM CDT for Harris County, Texas. It was in force for 29 min. 4 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
Oct 27, 2021, 8:16 AM CDT (13:16 UTC)
Expired
Oct 27, 2021, 8:45 AM CDT
In force
29 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Harris County, TX

The radar

The Houston radar (KHGX), 65 km from the middle of the area, began a volume at 13:20 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
Oct 27, 8:33 AM CDTTSTM WND DMG1 Nw Jersey Village, TXTREES DOWN JERSEY MEADOW GOLF COURSE.
Oct 27, 8:44 AM CDTTSTM WND DMG2 Sw Aldine, TXSTRUCTURE AND TREE DAMAGE WAS OBSERVED NEAR THE INTERSECTION OF AIRLINE RD AND WEST GULF BANK RD. POSSIBLE TORNADO PENDING FURTHER INVESTIGATION.
Oct 27, 8:44 AM CDTTSTM WND DMG2 Sw Aldine, TXCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. UPDATED PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. LARGE TREE DOWN ONTO HOME WITH SIGNIFICANT DAMAGE ON AIRWAY DRIVE. LITTLE OR NO DAMAGE TO SURROUNDING AREAS, NO DAMAGE PATH. NOT AWARE OF ANY SIGHTIN
Oct 27, 8:44 AM CDTTSTM WND DMG2 Sw Aldine, TXUPDATED PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. LARGE TREE DOWN ONTO HOME WITH SIGNIFICANT DAMAGE ON AIRWAY DRIVE. LITTLE OR NO DAMAGE TO SURROUNDING AREAS, NO DAMAGE PATH. NOT AWARE OF ANY SIGHTINGS OF FUNNELS REPORTED. KEEPING AS THUNDERSTORM WIND DAM

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

The watch it was issued in

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

IssuedProductOfficeLasted
Oct 27, 7:55 AM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.3 hours before the alert went out and 230 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 2021-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1422 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 2021-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 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
1422 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
1.1
Supercell composite
7.1

Open this sounding in Storm Lab

The text

As transmitted.

791 
WFUS54 KHGX 271316
TORHGX
TXC201-271345-
/O.NEW.KHGX.TO.W.0027.211027T1316Z-211027T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
816 AM CDT Wed Oct 27 2021

The National Weather Service in League City has issued a

* Tornado Warning for...
  Central Harris County in southeastern Texas...

* Until 845 AM CDT.
    
* At 815 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Cypress, or 7 miles northwest of Addicks Park Ten,
  moving east 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.

* This dangerous storm will be near...
  Jersey Village and northeastern Addicks Park Ten around 825 AM 
  CDT.
  Spring Branch West, Carverdale, Fairbanks / Northwest Crossing, 
  Westbranch and Willowbrook around 830 AM CDT.
  Spring Branch North, Spring Valley, Greater Inwood, Spring Branch 
  East and Spring Branch Central around 835 AM CDT.
  Hunters Creek Village, Greater Greenspoint, Hilshire Village, 
  Central Northwest, Langwood, Lazybrook / Timbergrove and Greater 
  Uptown around 840 AM CDT.
  Northside / Northline, Aldine, Near Northside Houston, Greater 
  Heights, Memorial Park, Downtown Houston, Neartown / Montrose, 
  Afton Oaks / River Oaks Area, Fourth Ward and Greater Fifth Ward 
  around 845 AM CDT.

Other locations impacted by this tornadic thunderstorm include
Discovery Green, Compass Stadium and Minute Maid Park.

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

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2987 9576 2994 9576 2999 9527 2972 9530
TIME...MOT...LOC 1315Z 276DEG 33KT 2990 9571 

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

$$
2 follow-up statements
901 
WWUS54 KHGX 271330
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
830 AM CDT Wed Oct 27 2021

TXC201-271345-
/O.CON.KHGX.TO.W.0027.000000T0000Z-211027T1345Z/
Harris TX-
830 AM CDT Wed Oct 27 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 AM CDT FOR CENTRAL
HARRIS COUNTY...
    
At 829 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Jersey Village, moving east 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.

This dangerous storm will be near...
  Greater Inwood, Langwood and Spring Branch East around 835 AM CDT.
  Greater Greenspoint, Central Northwest and Lazybrook / Timbergrove 
  around 840 AM CDT.
  Northside / Northline, Acres Home, Independence Heights and Hidden 
  Valley around 845 AM CDT.
  Near Northside Houston, Aldine, northern Greater Heights and 
  Eastex / Jensen Area around 850 AM CDT.
  Greater Fifth Ward, Houston Gardens, Settegast, East Little York / 
  Homestead, Kashmere Gardens and Denver Harbor / Port Houston 
  around 855 AM CDT.
  East Houston around 900 AM CDT.

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

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2984 9561 2995 9561 2999 9527 2978 9529
TIME...MOT...LOC 1329Z 276DEG 33KT 2989 9556 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$
Cady
767 
WWUS54 KHGX 271340
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
840 AM CDT Wed Oct 27 2021

TXC201-271350-
/O.EXP.KHGX.TO.W.0027.000000T0000Z-211027T1345Z/
Harris TX-
840 AM CDT Wed Oct 27 2021

...THE TORNADO WARNING FOR CENTRAL HARRIS COUNTY WILL EXPIRE AT 845
AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 400 PM CDT for southeastern
Texas.

LAT...LON 2984 9561 2995 9561 2999 9527 2978 9529
TIME...MOT...LOC 1340Z 276DEG 33KT 2988 9545 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 26, 10:39 PM CDTRip Current StatementHGXBrazoria, Galveston, Matagorda21 hr
Oct 27, 6:10 AM CDTSpecial Marine WarningHGX50 min
Oct 27, 6:44 AM CDTSpecial Weather StatementHGXAustin, Brazos, Grimes, Madison, Washington46 min
Oct 27, 6:56 AM CDTSpecial Marine WarningHGX34 min
Oct 27, 6:58 AM CDTSpecial Marine WarningHGX32 min
Oct 27, 7:23 AM CDTSpecial Marine WarningHGX37 min
Oct 27, 7:31 AM CDTSpecial Weather StatementHGXAustin, Colorado, Grimes, Jackson, Montgomery, Walker and 3 more44 min
Oct 27, 8:06 AM CDTTornado WarningHGXHarris, Montgomery24 min
Oct 27, 8:09 AM CDTSpecial Marine WarningHGX66 min
Oct 27, 8:09 AM CDTSpecial Marine WarningHGX66 min
Oct 27, 8:28 AM CDTSpecial Weather StatementHGXBrazoria, Fort Bend, Harris, Liberty, Matagorda, Montgomery and 4 more92 min
Oct 27, 8:38 AM CDTSevere Thunderstorm WarningHGXHarris37 min
Oct 27, 8:48 AM CDTTornado WarningHGXHarris, Liberty, Montgomery27 min
Oct 27, 8:55 AM CDTTornado WarningHGXHarris, Liberty35 min
Oct 27, 8:57 AM CDTSpecial Marine WarningHGX93 min
Oct 27, 9:16 AM CDTSevere Thunderstorm WarningHGXHarris29 min
Oct 27, 9:23 AM CDTSevere Thunderstorm WarningHGXChambers, Harris, Liberty37 min
Oct 27, 9:31 AM CDTSpecial Marine WarningHGX119 min
Oct 27, 9:52 AM CDTSpecial Weather StatementHGXChambers, Galveston53 min
Oct 27, 9:58 AM CDTSevere Thunderstorm WarningHGXChambers, Liberty32 min
Oct 27, 11:31 AM CDTSpecial Marine WarningHGX29 min
Oct 27, 11:51 AM CDTSpecial Marine WarningHGX84 min
Oct 27, 3:05 PM CDTWind AdvisoryHGXAustin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more28 hr
Oct 27, 3:26 PM CDTGale WarningHGX36 hr

Nearby

Tornado Warnings in Texas, 2021Every tornado warning in 2021Tornadoes in 2021

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.