Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this special weather statement at Jul 12, 2021, 12:01 PM CDT for Brazos County, Texas. It was in force for 59 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
- Jul 12, 2021, 12:01 PM CDT (17:01 UTC)
- Expired
- Jul 12, 2021, 1:00 PM CDT
- In force
- 59 min
- Issued by
- NWS Houston/Galveston, TX
County Brazos County, TX
The radar
The Ft Hood radar (KGRK), 115 km from the middle of the area, began a volume at 17:03 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
Fort Worth, TX (KFWD), launched 12:00Z, 5.0 hours before the alert went out and 271 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
- 373 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1322 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jul 12, 6:22 AM CDT, 5 hours 39 minutes earlier.
Area forecast discussion, Jul 12, 6:22 AM CDT, 5 hours 39 minutes before
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<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>In the hours before
Special weather statement, Jul 12, 9:08 AM CDT, 2 hours 53 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 908 AM CDT Mon Jul 12 2021 TXZ164-177>179-121445- San Jacinto TX-Walker TX-Polk TX-Trinity TX- 908 AM CDT Mon Jul 12 2021 ...Strong Thunderstorms Moving From Walker County into San Jacinto County... At 907 AM CDT, Doppler radar was tracking a strong thunderstorm 7 miles west of Point Blank, or 13 miles east of Huntsville, moving northeast at 25 mph. Winds to about 40 mph will be possible with the strongest part of this storm. Locations impacted include... Onalaska, Point Blank 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. && LAT...LON 3065 9549 3076 9542 3092 9516 3069 9506 TIME...MOT...LOC 1407Z 244DEG 24KT 3071 9533
Special weather statement, Jul 12, 9:36 AM CDT, 2 hours 25 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
936 AM CDT Mon Jul 12 2021
TXZ164-177>179-199-121515-
San Jacinto TX-Walker TX-Polk TX-Montgomery TX-Trinity TX-
936 AM CDT Mon Jul 12 2021
...Strong Thunderstorms Capable of Producing Heavy Rain and Gusty
Winds...
At 935 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Point Blank to 10 miles west of Coldspring
to near Panorama Village. Movement was northeast at 25 mph.
Winds in excess of 30 mph will be possible with these storms.
Locations impacted include...
Northwestern Conroe, Willis, Livingston, Shepherd, Panorama Village,
Onalaska, Corrigan, Coldspring, Point Blank, Lake Livingston State
Park, West Livingston, Oakhurst and Evergreen.
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.
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 3112 9479 3073 9492 3050 9501 3033 9554
3049 9543 3081 9530 3113 9481
TIME...MOT...LOC 1435Z 238DEG 20KT 3082 9521 3054 9530 3038 9546Special weather statement, Jul 12, 10:12 AM CDT, 1 hour 49 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
1012 AM CDT Mon Jul 12 2021
TXZ178-179-199-200-121600-
San Jacinto TX-Northern Liberty TX-Polk TX-Montgomery TX-
1012 AM CDT Mon Jul 12 2021
...LINE OF THUNDERSTORMS CONTINUES TO PRODUCE GUSTY WINDS AND BRIEF
HEAVY DOWNPOURS AS IT ADVANCES EASTWARD...
At 1012 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Livingston to Splendora. Movement was
southeast at 30 mph.
Winds in excess of 30 mph will be possible with these storms.
Locations impacted include...
Northern Liberty, Cleveland, Livingston, Shepherd, Onalaska,
Splendora, Patton Village, Roman Forest, Woodbranch, Coldspring,
Hardin, Plum Grove, Kenefick, Goodrich, North Cleveland, Dayton
Lakes, Lake Livingston State Park, West Livingston, Alabama-Coushatta
Reservation and Moss Hill.
LAT...LON 3049 9454 3049 9473 3028 9466 3008 9480
3013 9509 3017 9510 3014 9513 3019 9539
3084 9509 3078 9460
TIME...MOT...LOC 1512Z 299DEG 25KT 3075 9492 3024 9519Special weather statement, Jul 12, 12:01 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 1201 PM CDT Mon Jul 12 2021 TXZ176-195-196-198-121800- Madison TX-Brazos TX-Grimes TX-Burleson TX- 1201 PM CDT Mon Jul 12 2021 ...A Cluster of Strong Thunderstorms Near College Station... At 1200 PM CDT, Doppler radar was tracking a cluster of strong thunderstorm centered over the vicinity of College Station, moving northeast at 15 mph. Briefly heavy rain and wind gusts in excess of 30 mph may be possible with this storm. Locations impacted include... College Station, Bryan, Millican, Kyle Field, Iola, Wellborn and Carlos. LAT...LON 3040 9622 3058 9651 3086 9613 3068 9585 TIME...MOT...LOC 1700Z 227DEG 13KT 3057 9623
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:21 PM CDT | Special Weather Statement | HGX | Houston | 39 min |
| Jul 11, 7:39 PM CDT | Special Weather Statement | HGX | Houston | 51 min |
| Jul 11, 7:58 PM CDT | Special Weather Statement | HGX | Houston | 47 min |
| Jul 12, 8:29 AM CDT | Areal Flood Advisory | HGX | Brazos, Madison | 3 hr |
| Jul 12, 9:03 AM CDT | Areal Flood Advisory | HGX | Walker | 117 min |
| Jul 12, 9:08 AM CDT | Special Weather Statement | HGX | San Jacinto | 37 min |
| Jul 12, 9:36 AM CDT | Special Weather Statement | HGX | San Jacinto | 39 min |
| Jul 12, 10:12 AM CDT | Special Weather Statement | HGX | Liberty, Polk, San Jacinto | 48 min |
| Jul 12, 11:29 AM CDT | Areal Flood Advisory | HGX | Brazos, Madison | 3 hr |
| Jul 12, 11:33 AM CDT | Areal Flood Advisory | HGX | Houston | 3 hr |
| Jul 12, 12:43 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 18 min |
| Jul 12, 1:10 PM CDT | Areal Flood Advisory | HGX | Brazos, Grimes | 110 min |
| Jul 12, 1:21 PM CDT | Tornado Warning | HGX | Montgomery, Walker | 12 min |
| Jul 12, 2:34 PM CDT | Special Weather Statement | HGX | Montgomery, San Jacinto, Waller | 41 min |
| Jul 12, 3:06 PM CDT | Special Weather Statement | HGX | Harris | 39 min |
| Jul 12, 3:43 PM CDT | Special Weather Statement | HGX | Fort Bend, Harris | 47 min |
| Jul 12, 4:31 PM CDT | Special Weather Statement | HGX | Chambers, Fort Bend | 59 min |
Nearby
Special Weather Statements in Texas, 2021Every special weather statement 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.