Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 23, 2021, 1:19 AM CDT for 5 counties in Texas. It was in force for 41 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
- Mar 23, 2021, 1:19 AM CDT (06:19 UTC)
- Expired
- Mar 23, 2021, 2:00 AM CDT
- In force
- 41 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Grimes County, TX, Houston County, TX, Madison County, TX, Trinity County, TX, Walker County, TX
The radar
The Ft Hood radar (KGRK), 156 km from the middle of the area, began a volume at 06:19 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 |
|---|---|---|---|
| Mar 22, 11:10 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.3 hours before the alert went out and 260 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
- 82 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 715 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 405 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
840
WUUS54 KHGX 230619
SVRHGX
TXC185-225-313-455-471-230700-
/O.NEW.KHGX.SV.W.0021.210323T0619Z-210323T0700Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Houston/Galveston TX
119 AM CDT Tue Mar 23 2021
The National Weather Service in League City has issued a
* Severe Thunderstorm Warning for...
Southwestern Trinity County in southeastern Texas...
Northeastern Grimes County in southeastern Texas...
Southwestern Houston County in southeastern Texas...
Southeastern Madison County in southeastern Texas...
Northern Walker County in southeastern Texas...
* Until 200 AM CDT.
* At 118 AM CDT, a severe thunderstorm was located near Madisonville,
moving northeast at 45 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Madisonville, Trinity, Lovelady and Bedias.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
&&
LAT...LON 3069 9603 3091 9603 3118 9542 3093 9530
TIME...MOT...LOC 0618Z 247DEG 37KT 3086 9591
HAIL...1.50IN
WIND...60MPH
$$2 follow-up statements
303
WWUS54 KHGX 230634
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
134 AM CDT Tue Mar 23 2021
TXC185-230643-
/O.CAN.KHGX.SV.W.0021.000000T0000Z-210323T0700Z/
Grimes TX-
134 AM CDT Tue Mar 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRIMES COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
southeastern Texas.
LAT...LON 3076 9581 3099 9584 3118 9542 3093 9530
TIME...MOT...LOC 0633Z 247DEG 37KT 3092 9574
$$
TXC225-313-455-471-230700-
/O.CON.KHGX.SV.W.0021.000000T0000Z-210323T0700Z/
Trinity TX-Houston TX-Madison TX-Walker TX-
134 AM CDT Tue Mar 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR SOUTHWESTERN TRINITY...SOUTHWESTERN HOUSTON...SOUTHEASTERN
MADISON AND NORTHERN WALKER COUNTIES...
At 133 AM CDT, a severe thunderstorm was located 10 miles east of
Madisonville, moving northeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Trinity and Lovelady.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 3076 9581 3099 9584 3118 9542 3093 9530
TIME...MOT...LOC 0633Z 247DEG 37KT 3092 9574
HAIL...1.00IN
WIND...60MPH
$$700
WWUS54 KHGX 230644
SVSHGX
Severe Weather Statement
National Weather Service Houston/Galveston TX
144 AM CDT Tue Mar 23 2021
TXC225-313-455-471-230700-
/O.CON.KHGX.SV.W.0021.000000T0000Z-210323T0700Z/
Trinity TX-Houston TX-Madison TX-Walker TX-
144 AM CDT Tue Mar 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR SOUTHWESTERN TRINITY...SOUTHWESTERN HOUSTON...EAST CENTRAL
MADISON AND NORTHEASTERN WALKER COUNTIES...
At 144 AM CDT, a severe thunderstorm was located 14 miles west of
Trinity, or 15 miles south of Austonio, moving northeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Trinity and Lovelady.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 3080 9570 3088 9568 3099 9573 3118 9542
3093 9530
TIME...MOT...LOC 0644Z 247DEG 37KT 3097 9561
HAIL...1.00IN
WIND...60MPH
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 11:18 PM CDT | Special Weather Statement | HGX | Brazos, Burleson, Madison | 87 min |
| Mar 22, 11:57 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 48 min |
| Mar 23, 12:30 AM CDT | Small Craft Advisory | HGX | 4 hr | |
| Mar 23, 12:43 AM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison | 47 min |
| Mar 23, 1:16 AM CDT | Special Weather Statement | HGX | Burleson, Grimes, Washington | 44 min |
| Mar 23, 1:55 AM CDT | Severe Thunderstorm Warning | HGX | Polk, San Jacinto, Trinity, Walker | 35 min |
| Mar 23, 2:29 AM CDT | Severe Thunderstorm Warning | HGX | Polk, Trinity | 31 min |
| Mar 23, 3:16 AM CDT | Severe Thunderstorm Warning | HGX | Colorado | 26 min |
| Mar 23, 3:20 AM CDT | Special Weather Statement | HGX | Austin | 40 min |
| Mar 23, 3:44 AM CDT | Special Weather Statement | HGX | Colorado | 31 min |
| Mar 23, 4:06 AM CDT | Special Weather Statement | HGX | Fort Bend, Waller, Wharton | 54 min |
| Mar 23, 4:28 AM CDT | Special Weather Statement | HGX | Polk | 62 min |
| Mar 23, 5:50 AM CDT | Special Weather Statement | HGX | Brazoria | 55 min |
| Mar 23, 6:02 AM CDT | Special Weather Statement | HGX | Galveston | 43 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning 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.