Alert archive / Texas / Special Weather Statements in 2017
Special Weather Statement, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this special weather statement at Aug 7, 2017, 1:52 PM CDT for San Jacinto County, Trinity County, Walker County, Texas. It was in force for 23 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
- Aug 7, 2017, 1:52 PM CDT (18:52 UTC)
- Expired
- Aug 7, 2017, 2:15 PM CDT
- In force
- 23 min
- Issued by
- NWS Houston/Galveston, TX
Counties San Jacinto County, TX, Trinity County, TX, Walker County, TX
The radar
The Houston radar (KHGX), 150 km from the middle of the area, began a volume at 18:53 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, 6.9 hours before the alert went out and 221 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
- 1620 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 946 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 7, 12:50 PM CDT, 1 hour 2 minutes earlier.
Area forecast discussion, Aug 7, 12:50 PM CDT, 1 hour 2 minutes before
Area Forecast Discussion
National Weather Service Houston/Galveston TX
1250 PM CDT Mon Aug 7 2017
.AVIATION...
Messy TAFS as the line of strong storms rolls across the sites at
this time. Based on these current trends, will be tapering things
off later this afternoon (21-22Z). Not expecting much development
through the early evening hours, but short-range guidance remains
quite adamant with activity flaring up again overnight...possibly
along the front itself. 41
&&
.PREV DISCUSSION... /ISSUED 1057 AM CDT Mon Aug 7 2017/
Looking at areas of showers and thunderstorms to affect most of
Southeast Texas through the remainder of this morning. Although a
few outflow boundaries from this morning's convection should
provide the focus for additional storms this afternoon, do expect
slightly less coverage during the early afternoon since the main
upper level shortwave will be moving east of the forecast area.
Afternoon heating with available moisture (PWs 2 to 2.3 inches)
will help add to the instability and expect likely coverage over
at least the inland counties during the mid and late afternoon.
Some isolated strong storms will be possible. Do expect slightly
cooler temperatures this afternoon due to the cloud and rainfall
coverage.
Tweaked the rain chances and temperatures for today.
40
&&
.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL) 90 75 91 75 92 / 80 60 50 40 40
Houston (IAH) 90 77 89 76 91 / 70 60 60 30 40
Galveston (GLS) 89 81 87 81 88 / 50 50 50 20 40
&&
.HGX WATCHES/WARNINGS/ADVISORIES...
TX...High Rip Current Risk until 11 PM CDT this evening for the
following zones: Brazoria...Chambers...Galveston...
Matagorda.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION until 11 PM CDT this evening
for the following zones: Coastal waters from Freeport to
the Matagorda Ship Channel out 20 NM...Coastal waters from
High Island to Freeport out 20 NM...Galveston Bay...
Matagorda Bay...Waters from Freeport to the Matagorda Ship
Channel from 20 to 60 NM...Waters from High Island to
Freeport from 20 to 60 NM.
&&Hazardous weather outlook, Aug 7, 3:53 AM CDT, 9 hours 59 minutes before
Hazardous Weather Outlook National Weather Service Houston/Galveston TX 353 AM CDT Mon Aug 7 2017 TXZ163-164-176>179-195>200-210>214-226-227-235>238-080900- Austin-Brazoria-Brazos-Burleson-Chambers-Colorado-Fort Bend- Galveston-Grimes-Harris-Houston-Jackson-Liberty-Madison-Matagorda- Montgomery-Polk-San Jacinto-Trinity-Walker-Waller-Washington- Wharton- 353 AM CDT Mon Aug 7 2017 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Today and Tonight Scattered thunderstorms will be likely across Southeast Texas today. Some of these thunderstorms will be capable of brief heavy downpours. Localized street flooding is possible with the heaviest downpours. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Scattered to numerous showers and thunderstorms are expected across Southeast Texas Tuesday. Some of these thunderstorms may be capable of brief heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected. GMZ330-335-350-355-370-375-080900- Coastal waters from Freeport to the Matagorda Ship Channel out 20 NM-Coastal waters from High Island to Freeport out 20 NM- Galveston Bay-Matagorda Bay- Waters from Freeport to the Matagorda Ship Channel from 20 to 60 NM-Waters from High Island to Freeport from 20 to 60 NM- 353 AM CDT Mon Aug 7 2017 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Today and Tonight No hazardous weather expected. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Scattered showers and thunderstorms will be possible across the Upper Texas coastal waters through Tuesday and some of these thunderstorms may be capable of producing locally higher winds and waves. Tropical Storm Franklin is forecast to move westward across the Bay of Campeche Wednesday and Thursday which may lead to increased seas and long period swell by late in the week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Aug 7, 12:05 PM CDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1205 PM CDT MON AUG 7 2017
TXZ199-200-213-071730-
Liberty TX-Harris TX-Montgomery TX-
1205 PM CDT MON AUG 7 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MONTGOMERY...
SOUTHWESTERN LIBERTY AND CENTRAL HARRIS COUNTIES UNTIL 1230 PM CDT...
At 1205 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Willowbrook to Kashmere Gardens. Movement
was northeast at 35 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
Southeastern Conroe, Bellaire, Humble, West University Place, Galena
Park, Tomball, Jacinto City, Jersey Village, Hunters Creek Village,
Bunker Hill Village, Piney Point Village, Downtown Houston, Greenway
/ Upper Kirby Area, Kingwood, Spring Branch North, Second Ward, The
Woodlands, Greater Greenspoint, Spring and Greater Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
These storms 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 9536 2973 9560 2998 9567 3033 9538
3011 9507 2999 9503 2992 9500
TIME...MOT...LOC 1705Z 224DEG 28KT 2998 9557 2981 9534
40Special weather statement, Aug 7, 12:27 PM CDT, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1227 PM CDT MON AUG 7 2017
TXZ176-177-196-198-071800-
Madison TX-Walker TX-Brazos TX-Grimes TX-
1227 PM CDT MON AUG 7 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN GRIMES...EAST CENTRAL
BRAZOS...SOUTH CENTRAL MADISON AND WEST CENTRAL WALKER COUNTIES UNTIL
100 PM CDT...
At 1227 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Anderson, or 14 miles east of College Station,
moving northeast at 25 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Southeastern College Station, Bedias, Iola, Carlos and Roans Prairie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
If on or near Gibbons Creek Lake, 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 9604 3051 9616 3057 9625 3094 9600
3073 9571
TIME...MOT...LOC 1727Z 220DEG 21KT 3061 9607
40Special weather statement, Aug 7, 12:34 PM CDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1234 PM CDT MON AUG 7 2017
TXZ199-200-213-071800-
Liberty TX-Harris TX-Montgomery TX-
1234 PM CDT MON AUG 7 2017
...SPECIAL WEATHER STATEMENT...
At 1234 PM CDT, Doppler radar was tracking a strong thunderstorm over
El Dorado / Oates Prairie, or over Jacinto City, moving northeast at
30 mph.
Winds in excess of 30 mph will be possible with this storm.
Locations impacted include...
Northwestern Pasadena, South Houston, Humble, Galena Park, Jacinto
City, Midtown Houston, Cloverleaf, Downtown Houston, Kingwood, Second
Ward, eastern Greater Heights, Neartown / Montrose, Barrett, Greater
Eastwood, Near Northside Houston, Greater Fifth Ward, Channelview,
Greater Third Ward, Fourth Ward and Astrodome Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
&&
LAT...LON 2966 9522 2962 9539 2978 9541 3016 9519
2997 9492
TIME...MOT...LOC 1734Z 217DEG 24KT 2979 9526
HathawaySpecial weather statement, Aug 7, 12:56 PM CDT, 56 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1256 PM CDT MON AUG 7 2017
TXZ176-177-198-199-071830-
Madison TX-Walker TX-Grimes TX-Montgomery TX-
1256 PM CDT MON AUG 7 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GRIMES...
NORTHWESTERN MONTGOMERY...SOUTHEASTERN MADISON AND SOUTHERN WALKER
COUNTIES UNTIL 130 PM CDT...
At 1255 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southeast of Bedias, or 16 miles west of Huntsville, moving
northeast at 30 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Huntsville, Bedias, Crabbs Prairie and Roans Prairie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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.
&&
LAT...LON 3052 9588 3059 9604 3073 9609 3102 9577
3074 9544
TIME...MOT...LOC 1755Z 224DEG 26KT 3070 9582
HathawaySpecial weather statement, Aug 7, 1:24 PM CDT, 28 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 124 PM CDT MON AUG 7 2017 TXZ163-164-176>178-198-071900- San Jacinto TX-Madison TX-Walker TX-Grimes TX-Houston TX-Trinity TX- 124 PM CDT MON AUG 7 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TRINITY... NORTHEASTERN GRIMES...WEST CENTRAL SAN JACINTO...SOUTH CENTRAL HOUSTON...EAST CENTRAL MADISON AND WALKER COUNTIES UNTIL 200 PM CDT... At 123 PM CDT, Doppler radar was tracking a strong thunderstorm near Huntsville, moving northeast at 30 mph. Winds in excess of 40 mph and 1 to 2 inches of rainfall will be possible with this storm. Locations impacted include... Huntsville, Riverside, Huntsville State Park, Crabbs Prairie and Oakhurst. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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. && LAT...LON 3055 9565 3079 9586 3110 9554 3058 9516 TIME...MOT...LOC 1823Z 224DEG 25KT 3079 9562 Hathaway
Special weather statement, Aug 7, 1:52 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 152 PM CDT MON AUG 7 2017 TXZ163-164-177>179-071915- San Jacinto TX-Walker TX-Polk TX-Houston TX-Trinity TX- 152 PM CDT MON AUG 7 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TRINITY...NORTHERN SAN JACINTO...SOUTHWESTERN HOUSTON...SOUTHWESTERN POLK AND EASTERN WALKER COUNTIES UNTIL 215 PM CDT... At 152 PM CDT, Doppler radar was tracking a strong thunderstorm near Riverside, or 16 miles northeast of Huntsville, moving northeast at 30 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Lake Livingston, Huntsville, Trinity, Onalaska, Groveton, New Waverly, Coldspring, Point Blank, Lovelady, Riverside, Goodrich, Sebastopol, Lake Livingston State Park, West Livingston, Huntsville State Park, Pennington, Oakhurst and Evergreen. 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. 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 3051 9555 3112 9562 3129 9517 3056 9492 TIME...MOT...LOC 1852Z 241DEG 27KT 3083 9531 Hathaway
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:38 AM CDT | Rip Current Statement | HGX | Brazoria, Chambers, Galveston, Matagorda | 14 hr |
| Aug 7, 9:07 AM CDT | Areal Flood Advisory | HGX | Austin, Fort Bend, Waller, Wharton | 53 min |
| Aug 7, 9:31 AM CDT | Areal Flood Advisory | HGX | Harris | 59 min |
| Aug 7, 10:00 AM CDT | Special Weather Statement | HGX | Colorado | 30 min |
| Aug 7, 10:25 AM CDT | Special Weather Statement | HGX | Austin | 35 min |
| Aug 7, 10:48 AM CDT | Special Weather Statement | HGX | Fort Bend | 42 min |
| Aug 7, 11:09 AM CDT | Special Weather Statement | HGX | Brazos | 36 min |
| Aug 7, 11:26 AM CDT | Special Weather Statement | HGX | Fort Bend | 34 min |
| Aug 7, 11:37 AM CDT | Special Weather Statement | HGX | Liberty | 38 min |
| Aug 7, 11:58 AM CDT | Special Weather Statement | HGX | Fort Bend | 32 min |
| Aug 7, 12:05 PM CDT | Special Weather Statement | HGX | Harris | 25 min |
| Aug 7, 12:11 PM CDT | Special Marine Warning | HGX | 94 min | |
| Aug 7, 12:27 PM CDT | Special Weather Statement | HGX | Grimes | 33 min |
| Aug 7, 12:34 PM CDT | Special Weather Statement | HGX | Harris | 26 min |
| Aug 7, 12:55 PM CDT | Areal Flood Advisory | HGX | Harris, Montgomery | 65 min |
| Aug 7, 12:56 PM CDT | Special Weather Statement | HGX | Walker | 34 min |
| Aug 7, 1:24 PM CDT | Special Weather Statement | HGX | Walker | 36 min |
| Aug 7, 1:37 PM CDT | Special Marine Warning | HGX | 53 min | |
| Aug 7, 2:13 PM CDT | Special Weather Statement | HGX | Polk, Trinity | 47 min |
| Aug 7, 2:56 PM CDT | Special Weather Statement | HGX | Trinity | 34 min |
Nearby
Special Weather Statements in Texas, 2017Every special weather statement in 2017
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.