Alert archive / Texas / Tornado Warnings in 2021
Tornado Warning 28, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Oct 27, 2021, 8:48 AM CDT for Harris County, Liberty County, Montgomery County, Texas. It was in force for 27 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
- Oct 27, 2021, 8:48 AM CDT (13:48 UTC)
- Expired
- Oct 27, 2021, 9:15 AM CDT
- In force
- 27 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Harris County, TX, Liberty County, TX, Montgomery County, TX
The radar
The Houston radar (KHGX), 68 km from the middle of the area, began a volume at 13:49 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 27, 8:50 AM CDT | TORNADO | 3 Sw Porter Heights, TX | A BRIEF TORNADO WAS OBSERVED NEAR GRAND OAKS HIGH SCHOOL IN SPRING. BASED ON VIDEO APPEARED TO BRIEFLY TOUCH DOWN IN A FIELD. ONLY DAMAGE EVIDENT A SOCCER GOAL WAS FLIPPED OVER. VERY SHORT LIVED. TORNADO RATED EF0. |
| Oct 27, 8:50 AM CDT | TORNADO | 3 Sw Porter Heights, TX | CORRECTS PREVIOUS TORNADO REPORT FROM 3 SW PORTER HEIGHTS. A BRIEF TORNADO WAS OBSERVED NEAR GRAND OAKS HIGH SCHOOL IN SPRING. BASED ON VIDEO APPEARED TO BRIEFLY TOUCH DOWN IN A FIELD. ONLY DAMAGE EVIDENT A SOCCER GOAL WAS FLIPPED OVER. VERY SHORT LIVED. TORNA |
| Oct 27, 8:50 AM CDT | TORNADO | 3 Sw Porter Heights, TX | A TORNADO WAS OBSERVED NEAR GRAND OAKS HIGH SCHOOL IN SPRING. RATING IS SUBJECT TO CHANGE AS WE GATHER ADDITIONAL INFORMATION. |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 27, 7:55 AM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.8 hours before the alert went out and 189 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.
- 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
The text
As transmitted.
785
WFUS54 KHGX 271348
TORHGX
TXC201-291-339-271415-
/O.NEW.KHGX.TO.W.0028.211027T1348Z-211027T1415Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
848 AM CDT Wed Oct 27 2021
The National Weather Service in League City has issued a
* Tornado Warning for...
Southeastern Montgomery County in southeastern Texas...
Western Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 915 AM CDT.
* At 847 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Porter Heights, or near Spring, 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 dangerous storm will be near...
Kingwood around 905 AM CDT.
Lake Houston around 910 AM CDT.
Other locations impacted by this tornadic thunderstorm include Porter
and New Caney.
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.
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 2998 9505 3011 9537 3016 9536 3017 9501
TIME...MOT...LOC 1347Z 285DEG 32KT 3012 9532
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Cady1 follow-up statement
345
WWUS54 KHGX 271407
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
907 AM CDT Wed Oct 27 2021
TXC201-291-339-271417-
/O.EXP.KHGX.TO.W.0028.000000T0000Z-211027T1415Z/
Montgomery TX-Liberty TX-Harris TX-
907 AM CDT Wed Oct 27 2021
...THE TORNADO WARNING FOR SOUTHEASTERN MONTGOMERY...WESTERN LIBERTY
AND NORTHEASTERN HARRIS COUNTIES WILL EXPIRE AT 915 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Tornado Watch remains in effect until 400 PM CDT for southeastern
Texas.
LAT...LON 2998 9505 3011 9537 3016 9536 3017 9501
TIME...MOT...LOC 1407Z 285DEG 32KT 3008 9513
$$
CadyThe office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 10:39 PM CDT | Rip Current Statement | HGX | Brazoria, Galveston, Matagorda | 21 hr |
| Oct 27, 6:10 AM CDT | Special Marine Warning | HGX | 50 min | |
| Oct 27, 6:44 AM CDT | Special Weather Statement | HGX | Austin, Brazos, Grimes, Madison, Washington | 46 min |
| Oct 27, 6:56 AM CDT | Special Marine Warning | HGX | 34 min | |
| Oct 27, 6:58 AM CDT | Special Marine Warning | HGX | 32 min | |
| Oct 27, 7:23 AM CDT | Special Marine Warning | HGX | 37 min | |
| Oct 27, 7:31 AM CDT | Special Weather Statement | HGX | Austin, Colorado, Grimes, Jackson, Montgomery, Walker and 3 more | 44 min |
| Oct 27, 8:06 AM CDT | Tornado Warning | HGX | Harris, Montgomery | 24 min |
| Oct 27, 8:09 AM CDT | Special Marine Warning | HGX | 66 min | |
| Oct 27, 8:09 AM CDT | Special Marine Warning | HGX | 66 min | |
| Oct 27, 8:16 AM CDT | Tornado Warning | HGX | Harris | 29 min |
| Oct 27, 8:28 AM CDT | Special Weather Statement | HGX | Brazoria, Fort Bend, Harris, Liberty, Matagorda, Montgomery and 4 more | 92 min |
| Oct 27, 8:38 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 37 min |
| Oct 27, 8:55 AM CDT | Tornado Warning | HGX | Harris, Liberty | 35 min |
| Oct 27, 8:57 AM CDT | Special Marine Warning | HGX | 93 min | |
| Oct 27, 9:16 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 29 min |
| Oct 27, 9:23 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris, Liberty | 37 min |
| Oct 27, 9:31 AM CDT | Special Marine Warning | HGX | 119 min | |
| Oct 27, 9:52 AM CDT | Special Weather Statement | HGX | Chambers, Galveston | 53 min |
| Oct 27, 9:58 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 32 min |
| Oct 27, 11:31 AM CDT | Special Marine Warning | HGX | 29 min | |
| Oct 27, 11:51 AM CDT | Special Marine Warning | HGX | 84 min | |
| Oct 27, 3:05 PM CDT | Wind Advisory | HGX | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 28 hr |
| Oct 27, 3:26 PM CDT | Gale Warning | HGX | 36 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.