Alert archive / Texas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 14, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 4, 2020, 12:01 PM CST for Montgomery County, San Jacinto County, Walker County, Texas. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 4, 2020, 12:01 PM CST (18:01 UTC)
- Expired
- Mar 4, 2020, 12:30 PM CST
- In force
- 29 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Montgomery County, TX, San Jacinto County, TX, Walker County, TX
The radar
The Houston radar (KHGX), 123 km from the middle of the area, began a volume at 18:03 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.0 hours before the alert went out and 218 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
- 1481 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 294 m²/s²
- Significant tornado parameter
- 2.5
- Supercell composite
- 10.5
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 4, 11:53 AM CST, 8 minutes earlier.
Area forecast discussion, Mar 4, 11:53 AM CST, 8 minutes before
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</html>In the hours before
Special weather statement, Mar 4, 9:58 AM CST, 2 hours 3 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
958 AM CST Wed Mar 4 2020
TXZ163-176-177-041630-
Walker TX-Madison TX-Houston TX-
958 AM CST Wed Mar 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN HOUSTON...EASTERN MADISON
AND NORTHWESTERN WALKER COUNTIES UNTIL 1030 AM CST...
At 958 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Grapeland to 7 miles southeast of Bedias.
Movement was east at 40 mph.
Half inch hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Crockett, Austonio, Grapeland, Lovelady and Latexo.
A Severe Thunderstorm Watch remains in effect until noon CST for
southeastern Texas.
LAT...LON 3155 9531 3078 9551 3080 9585 3109 9580
3109 9577 3114 9577 3116 9573 3121 9575
3123 9573 3127 9573 3132 9566 3134 9566
3135 9568 3136 9566 3140 9570 3146 9571
TIME...MOT...LOC 1558Z 254DEG 34KT 3154 9554 3068 9589
TJCLocal storm report, Mar 4, 10:20 AM CST, 1 hour 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1020 AM CST WED MAR 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0909 AM HAIL 6 NNW UR089 30.79N 96.42W
03/04/2020 E1.00 INCH BRAZOS TX TRAINED SPOTTER
&&Special weather statement, Mar 4, 10:37 AM CST, 1 hour 24 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1037 AM CST Wed Mar 4 2020
TXZ163-164-041700-
Houston TX-Trinity TX-
1037 AM CST Wed Mar 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN TRINITY AND
NORTHEASTERN HOUSTON COUNTIES UNTIL 1100 AM CST...
At 1036 AM CST, Doppler radar was tracking a strong thunderstorm 7
miles east of Crockett, moving east at 35 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Kennard.
A Severe Thunderstorm Watch remains in effect until noon CST for
southeastern Texas.
LAT...LON 3154 9514 3152 9510 3150 9509 3149 9511
3147 9510 3146 9507 3147 9506 3144 9504
3144 9501 3142 9500 3141 9498 3140 9498
3139 9496 3126 9538 3145 9545 3155 9515
TIME...MOT...LOC 1636Z 251DEG 30KT 3134 9533
TJCSpecial weather statement, Mar 4, 10:59 AM CST, 1 hour 2 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1059 AM CST Wed Mar 4 2020
TXZ163-164-041730-
Houston TX-Trinity TX-
1059 AM CST Wed Mar 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN TRINITY AND EAST
CENTRAL HOUSTON COUNTIES UNTIL 1130 AM CST...
At 1058 AM CST, Doppler radar was tracking a strong thunderstorm 9
miles west of Apple Springs, moving northeast at 40 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Apple Springs, Groveton and Centralia.
A Severe Thunderstorm Watch remains in effect until noon CST for
southeastern Texas.
LAT...LON 3138 9495 3135 9496 3134 9496 3134 9491
3133 9490 3130 9489 3128 9488 3126 9490
3125 9487 3123 9486 3121 9486 3118 9485
3115 9485 3105 9516 3131 9521 3139 9496
TIME...MOT...LOC 1658Z 245DEG 35KT 3121 9513
TJCSpecial weather statement, Mar 4, 11:05 AM CST, 56 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 1105 AM CST Wed Mar 4 2020 TXZ176-177-198-041730- Walker TX-Madison TX-Grimes TX- 1105 AM CST Wed Mar 4 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GRIMES...SOUTH CENTRAL MADISON AND WEST CENTRAL WALKER COUNTIES UNTIL 1130 AM CST... At 1105 AM CST, Doppler radar was tracking a strong thunderstorm near Bedias, or 15 miles southwest of Madisonville, moving northeast at 35 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Madisonville, Bedias and Iola. A Severe Thunderstorm Watch remains in effect until noon CST for southeastern Texas. LAT...LON 3068 9603 3075 9615 3102 9603 3089 9573 TIME...MOT...LOC 1705Z 216DEG 29KT 3077 9605 TJC
Special weather statement, Mar 4, 11:22 AM CST, 39 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 1122 AM CST Wed Mar 4 2020 TXZ198-199-212-041745- Waller TX-Grimes TX-Montgomery TX- 1122 AM CST Wed Mar 4 2020 ...SPECIAL WEATHER STATEMENT... At 1122 AM CST, Doppler radar was tracking a strong thunderstorm near Todd Mission, or 12 miles northwest of Pinehurst, moving northeast at 40 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Montgomery, Todd Mission, Plantersville, Dobbin and Dacus. A Severe Thunderstorm Watch remains in effect until noon CST for southeastern Texas. LAT...LON 3015 9586 3026 9602 3058 9576 3043 9552 TIME...MOT...LOC 1722Z 220DEG 36KT 3027 9589 TJC
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 12:37 AM CST | Dense Fog Advisory | HGX | Brazoria, Chambers, Galveston, Jackson, Matagorda | 8 hr |
| Mar 4, 8:23 AM CST | Special Weather Statement | HGX | Brazos | 22 min |
| Mar 4, 8:53 AM CST | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 22 min |
| Mar 4, 9:13 AM CST | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison | 32 min |
| Mar 4, 9:35 AM CST | Special Weather Statement | HGX | Madison | 25 min |
| Mar 4, 9:47 AM CST | Special Weather Statement | HGX | Madison | 13 min |
| Mar 4, 9:58 AM CST | Special Weather Statement | HGX | Houston | 32 min |
| Mar 4, 10:11 AM CST | Small Craft Advisory | HGX | 29 hr | |
| Mar 4, 10:23 AM CST | Severe Thunderstorm Warning | HGX | Houston, Trinity, Walker | 37 min |
| Mar 4, 10:37 AM CST | Special Weather Statement | HGX | Houston | 23 min |
| Mar 4, 10:59 AM CST | Special Weather Statement | HGX | Trinity | 31 min |
| Mar 4, 11:05 AM CST | Special Weather Statement | HGX | Madison | 25 min |
| Mar 4, 11:10 AM CST | Severe Thunderstorm Warning | HGX | Houston, Polk, Trinity | 20 min |
| Mar 4, 11:22 AM CST | Special Weather Statement | HGX | Montgomery | 23 min |
| Mar 4, 11:38 AM CST | Severe Thunderstorm Warning | HGX | Grimes, Montgomery, Walker | 37 min |
| Mar 4, 12:29 PM CST | Special Weather Statement | HGX | Polk, San Jacinto | 31 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020
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.