Alert archive / Texas / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 64, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 3, 2018, 6:56 PM CDT for Chambers County, Liberty County, Texas. It was in force for 64 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
- Jul 3, 2018, 6:56 PM CDT (23:56 UTC)
- Expired
- Jul 3, 2018, 8:00 PM CDT
- In force
- 64 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Chambers County, TX, Liberty County, TX
The radar
The Houston radar (KHGX), 60 km from the middle of the area, began a volume at 23:58 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, 11.9 hours before the alert went out and 150 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
- 1603 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 825 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -2.1
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 Jul 3, 3:39 PM CDT, 3 hours 17 minutes earlier.
Area forecast discussion, Jul 3, 3:39 PM CDT, 3 hours 17 minutes before
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Hazardous Weather Outlook National Weather Service Houston/Galveston TX 411 PM CDT Tue Jul 3 2018 TXZ163-164-176>179-195>200-210>214-226-227-235>238-300-313- 335>338-436>438-042115- Austin-Brazoria Islands-Brazos-Burleson-Chambers-Coastal Brazoria- Coastal Galveston-Coastal Harris-Coastal Jackson- Coastal Matagorda-Colorado-Fort Bend- Galveston Island and Bolivar Peninsula-Grimes-Houston- Inland Brazoria-Inland Galveston-Inland Harris-Inland Jackson- Inland Matagorda-Madison-Matagorda Islands-Montgomery- Northern Liberty-Polk-San Jacinto-Southern Liberty-Trinity-Walker- Waller-Washington-Wharton- 411 PM CDT Tue Jul 3 2018 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Tonight Showers and thunderstorms will move into eastern portions of southeast Texas this evening. The primary threat from these storms will be wind gusts between 25 and 45 mph. Another cluster of storms will redevelop overnight around the Galveston Bay area. Localized heavy rain is possible. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Showers and thunderstorms will increase in areal coverage Wednesday morning and continue into the afternoon hours. One to three inch accumulations are expected for most locations, but localized 4 to 5 inch amounts are possible. At this time, it appears the higher totals may be near Galveston Bay. Several inches of rain in a short time period may cause street flooding and a rise on smaller streams and bayous. Precipitation should taper off in the late afternoon and evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed at this time. GMZ330-335-350-355-370-375-042115- Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM-Coastal waters from High Island to Freeport TX out 20 NM- Galveston Bay-Matagorda Bay- Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM-Waters from High Island to Freeport TX from 20 to 60 NM- 411 PM CDT Tue Jul 3 2018 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Tonight A cluster of storms is expected to develop over the marine waters late tonight. Winds and seas will be higher in and near storms. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Heavy rainfall, frequent lightning, and gusty winds are possible Wednesday morning and afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed at this time.
In the hours before
Special weather statement, Jul 3, 5:10 PM CDT, 1 hour 46 minutes before
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Special Weather Statement
National Weather Service Houston/Galveston TX
524 PM CDT TUE JUL 3 2018
TXZ163-164-179-032330-
Polk TX-Houston TX-Trinity TX-
524 PM CDT TUE JUL 3 2018
...SPECIAL WEATHER STATEMENT...
At 524 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Forest to Apple Springs to
near Corrigan. Movement was southwest at 10 mph.
Winds in excess of 30 mph will be possible with these storms.
Locations impacted include...
Apple Springs, Groveton, Kennard, Pennington and Centralia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3144 9504 3144 9501 3142 9500 3141 9498
3141 9497 3139 9496 3136 9495 3135 9496
3134 9495 3124 9493 3111 9487 3084 9517
3097 9523 3138 9528 3146 9506
TIME...MOT...LOC 2224Z 045DEG 8KT 3143 9503 3120 9498 3106 9488Special weather statement, Jul 3, 6:04 PM CDT, 52 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
604 PM CDT TUE JUL 3 2018
TXZ164-177>179-200-032345-
San Jacinto TX-Walker TX-Northern Liberty TX-Polk TX-Trinity TX-
604 PM CDT TUE JUL 3 2018
...SPECIAL WEATHER STATEMENT...
At 603 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Onalaska to near Goodrich to 6 miles west
of Wildwood. Movement was southwest at 20 mph.
Winds in excess of 30 mph will be possible with these storms.
Locations impacted include...
Eastern Huntsville, Cleveland, Livingston, Shepherd, Onalaska,
Coldspring, Point Blank, Goodrich, North Cleveland, Lake Livingston
State Park, West Livingston, Oakhurst, Tarkington Prairie, Segno,
Romayor, Evergreen and Rye.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
If on or near Lake Livingston, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
&&
LAT...LON 3049 9473 3029 9466 3025 9469 3036 9517
3073 9553 3091 9508 3064 9482 3059 9456
3049 9454
TIME...MOT...LOC 2303Z 047DEG 18KT 3087 9513 3060 9489 3054 9455Special weather statement, Jul 3, 6:43 PM CDT, 13 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
643 PM CDT TUE JUL 3 2018
TXZ214-300-040015-
Chambers TX-Southern Liberty TX-
643 PM CDT TUE JUL 3 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CHAMBERS AND
SOUTHEASTERN LIBERTY COUNTIES UNTIL 715 PM CDT...
At 643 PM CDT, Doppler radar was tracking a strong thunderstorm over
Winnie, or near Hamshire, moving west at 25 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Winnie, Stowell and Hankamer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 2968 9465 2994 9469 2994 9444 2989 9444
2989 9436 2974 9436
TIME...MOT...LOC 2343Z 083DEG 20KT 2984 9438The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 5:10 PM CDT | Special Weather Statement | HGX | Polk | 50 min |
| Jul 3, 5:24 PM CDT | Special Weather Statement | HGX | Trinity | 66 min |
| Jul 3, 6:04 PM CDT | Special Weather Statement | HGX | San Jacinto | 41 min |
| Jul 3, 6:27 PM CDT | Severe Thunderstorm Warning | HGX | Liberty, Montgomery, Polk, San Jacinto | 48 min |
| Jul 3, 6:43 PM CDT | Special Weather Statement | HGX | Chambers | 32 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2018Every severe thunderstorm warning 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.