Alert archive / Texas / Tornado Warnings in 2018
Tornado Warning 13, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Oct 31, 2018, 4:43 PM CDT for Fort Bend County, Harris County, Waller County, Texas. It was in force for 31 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
- Oct 31, 2018, 4:43 PM CDT (21:43 UTC)
- Expired
- Oct 31, 2018, 5:14 PM CDT
- In force
- 31 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Fort Bend County, TX, Harris County, TX, Waller County, TX
The radar
The Houston radar (KHGX), 86 km from the middle of the area, began a volume at 21:45 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 31, 3:02 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.7 hours before the alert went out and 257 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
- 649 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.0
The text
As transmitted.
742
WFUS54 KHGX 312143
TORHGX
TXC157-201-473-312230-
/O.NEW.KHGX.TO.W.0013.181031T2143Z-181031T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
443 PM CDT WED OCT 31 2018
The National Weather Service in League City has issued a
* Tornado Warning for...
North central Fort Bend County in southeastern Texas...
Southeastern Waller County in southeastern Texas...
West central Harris County in southeastern Texas...
* Until 530 PM CDT.
* At 443 PM CDT, a severe thunderstorm capable of producing a
tornado was located over Brookshire, moving northeast at 15 mph.
This storm has a history of producing tornadoes.
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...
Katy around 505 PM 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, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 2975 9586 2979 9602 3004 9584 2989 9569
TIME...MOT...LOC 2143Z 225DEG 15KT 2979 9591
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$2 follow-up statements
370
WWUS54 KHGX 312152
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
452 PM CDT WED OCT 31 2018
TXC157-312202-
/O.CAN.KHGX.TO.W.0013.000000T0000Z-181031T2230Z/
Fort Bend TX-
452 PM CDT WED OCT 31 2018
...THE TORNADO WARNING FOR NORTH CENTRAL FORT BEND COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Texas.
LAT...LON 2979 9586 2984 9598 3004 9584 2989 9569
TIME...MOT...LOC 2152Z 225DEG 15KT 2982 9588
$$
TXC201-473-312230-
/O.CON.KHGX.TO.W.0013.000000T0000Z-181031T2230Z/
Waller TX-Harris TX-
452 PM CDT WED OCT 31 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
SOUTHEASTERN WALLER AND WEST CENTRAL HARRIS COUNTIES...
At 452 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Katy, moving northeast at 15 mph. The storm has a
history of producing tornadoes
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...
Katy around 505 PM 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, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 2979 9586 2984 9598 3004 9584 2989 9569
TIME...MOT...LOC 2152Z 225DEG 15KT 2982 9588
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$062
WWUS54 KHGX 312214
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
514 PM CDT WED OCT 31 2018
TXC201-473-312223-
/O.CAN.KHGX.TO.W.0013.000000T0000Z-181031T2230Z/
Waller TX-Harris TX-
514 PM CDT WED OCT 31 2018
...THE TORNADO WARNING FOR SOUTHEASTERN WALLER AND WEST CENTRAL
HARRIS COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened, and no longer
appears capable of producing a tornado.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Texas.
Remember, a Severe Thunderstorm Warning still remains in effect for
the storm in eastern Harris County.
LAT...LON 2979 9586 2984 9598 3004 9584 2989 9569
TIME...MOT...LOC 2213Z 225DEG 15KT 2988 9581
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 4:26 AM CDT | Small Craft Advisory | HGX | 47 hr | |
| Oct 31, 9:02 AM CDT | Special Weather Statement | HGX | Matagorda | 28 min |
| Oct 31, 3:16 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Colorado, Fort Bend, Waller, Wharton | 29 min |
| Oct 31, 3:17 PM CDT | Tornado Warning | HGX | Fort Bend, Harris | 28 min |
| Oct 31, 3:21 PM CDT | Special Marine Warning | HGX | 24 min | |
| Oct 31, 3:27 PM CDT | Tornado Warning | HGX | Austin, Colorado | 18 min |
| Oct 31, 3:45 PM CDT | Tornado Warning | HGX | Austin, Waller | 15 min |
| Oct 31, 3:50 PM CDT | Areal Flood Advisory | HGX | Fort Bend, Harris | 55 min |
| Oct 31, 4:02 PM CDT | Tornado Warning | HGX | Austin, Fort Bend, Waller | 43 min |
| Oct 31, 4:08 PM CDT | Special Weather Statement | HGX | Harris | 52 min |
| Oct 31, 4:29 PM CDT | Areal Flood Advisory | HGX | Brazoria, Chambers, Fort Bend, Harris, Liberty | 2 hr |
| Oct 31, 4:50 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris, Liberty | 35 min |
| Oct 31, 4:52 PM CDT | Severe Thunderstorm Warning | HGX | Burleson | 38 min |
| Oct 31, 4:59 PM CDT | Tornado Warning | HGX | Burleson | 26 min |
| Oct 31, 6:04 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazos, Burleson, Washington | 41 min |
| Oct 31, 6:51 PM CDT | Special Weather Statement | HGX | Austin, Colorado, Montgomery, San Jacinto, Trinity, Walker and 1 more | 54 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.