Alert archive / Texas / Tornado Warnings in 2021
Tornado Warning 4, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Apr 23, 2021, 5:45 PM CDT for Liberty County, Montgomery County, San Jacinto County, Texas. It was in force for 30 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
- Apr 23, 2021, 5:45 PM CDT (22:45 UTC)
- Expired
- Apr 23, 2021, 6:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Liberty County, TX, Montgomery County, TX, San Jacinto County, TX
The radar
The Houston radar (KHGX), 100 km from the middle of the area, began a volume at 22:48 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 |
|---|---|---|---|
| Apr 23, 2:00 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.8 hours before the alert went out and 206 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
- 12 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 373 m²/s²
- 0-3 km storm-relative helicity
- 419 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
989
WFUS54 KHGX 232245
TORHGX
TXC291-339-407-232315-
/O.NEW.KHGX.TO.W.0004.210423T2245Z-210423T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Houston/Galveston TX
545 PM CDT Fri Apr 23 2021
The National Weather Service in League City has issued a
* Tornado Warning for...
East central Montgomery County in southeastern Texas...
Southwestern San Jacinto County in southeastern Texas...
Northwestern Liberty County in southeastern Texas...
* Until 615 PM CDT.
* At 545 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Cut And Shoot, or near Conroe, moving east at 35
mph.
HAZARD...Tornado and quarter size hail.
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 Montgomery, southwestern San Jacinto and northwestern
Liberty Counties.
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 3028 9546 3043 9548 3044 9512 3029 9511
TIME...MOT...LOC 2245Z 268DEG 32KT 3037 9540
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$1 follow-up statement
032
WWUS54 KHGX 232312
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
612 PM CDT Fri Apr 23 2021
TXC291-339-407-232321-
/O.EXP.KHGX.TO.W.0004.000000T0000Z-210423T2315Z/
Montgomery TX-San Jacinto TX-Liberty TX-
612 PM CDT Fri Apr 23 2021
...THE TORNADO WARNING FOR EAST CENTRAL MONTGOMERY...SOUTHWESTERN SAN
JACINTO AND NORTHWESTERN LIBERTY COUNTIES WILL EXPIRE AT 615 PM
CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 900 PM CDT for southeastern
Texas.
LAT...LON 3028 9546 3043 9548 3044 9512 3029 9511
TIME...MOT...LOC 2311Z 268DEG 32KT 3038 9515
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 4:05 AM CDT | Beach Hazards Statement | HGX | Brazoria, Galveston, Matagorda | 23 hr |
| Apr 23, 2:25 PM CDT | Special Weather Statement | HGX | Grimes | 50 min |
| Apr 23, 2:56 PM CDT | Special Weather Statement | HGX | Madison | 49 min |
| Apr 23, 4:35 PM CDT | Special Weather Statement | HGX | Grimes | 40 min |
| Apr 23, 5:00 PM CDT | Areal Flood Advisory | HGX | Brazos, Grimes, Montgomery, Walker | 60 min |
| Apr 23, 5:19 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery, Walker | 26 min |
| Apr 23, 5:31 PM CDT | Areal Flood Advisory | HGX | Montgomery, Polk, San Jacinto, Trinity, Walker | 119 min |
| Apr 23, 5:48 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery, Polk, San Jacinto, Walker | 27 min |
| Apr 23, 6:09 PM CDT | Tornado Warning | HGX | Liberty, Polk, San Jacinto | 36 min |
| Apr 23, 6:27 PM CDT | Severe Thunderstorm Warning | HGX | Liberty, Polk | 18 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.