Alert archive / Texas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 137, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jul 8, 2017, 6:15 PM CDT for Houston County, Texas. It was in force for 30 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 8, 2017, 6:15 PM CDT (23:15 UTC)
- Expired
- Jul 8, 2017, 6:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Houston County, TX
The radar
The Shreveport radar (KSHV), 195 km from the middle of the area, began a volume at 23:17 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
Shreveport, LA (KBAD), launched 12:00Z, 11.3 hours before the alert went out and 204 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
- 1281 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1248 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 8, 3:36 PM CDT, 2 hours 39 minutes earlier.
Area forecast discussion, Jul 8, 3:36 PM CDT, 2 hours 39 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<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.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jul 8, 3:32 AM CDT, 14 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Houston/Galveston TX 332 AM CDT Sat Jul 8 2017 TXZ163-164-176>179-195>200-210>214-226-227-235>238-090845- 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- 332 AM CDT Sat Jul 8 2017 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Today and Tonight Scattered showers and thunderstorms will again be possible today. The storms could be slow moving and locally heavy rain will be possible in the stronger storms. In addition, some of the stronger storms could produce brief gusty winds late this afternoon, mainly northeast of a College Station to Houston to Liberty line. Heat index values will range between 100 and 105 degrees this afternoon. .DAYS TWO THROUGH SEVEN...Sunday through Friday Scattered showers and thunderstorms will persist on Sunday and Monday. Storm motion will again be slow so a few of the stronger storms could produce locally heavy rain. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. GMZ330-335-350-355-370-375-090845- 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- 332 AM CDT Sat Jul 8 2017 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Jul 8, 4:17 PM CDT, 1 hour 58 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
417 PM CDT SAT JUL 8 2017
TXZ164-082200-
Trinity TX-
417 PM CDT SAT JUL 8 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TRINITY COUNTY UNTIL
500 PM CDT...
At 416 PM CDT, Doppler radar was tracking a strong thunderstorm near
Groveton, or 20 miles southwest of Apple Springs. Little movement
was noted and this storm is nearly stationary at this time.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Trinity, Groveton and Sebastopol.
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 3097 9510 3090 9519 3092 9536 3098 9539
3109 9537 3117 9522 3116 9512
TIME...MOT...LOC 2116Z 179DEG 1KT 3103 9524Special weather statement, Jul 8, 5:22 PM CDT, 53 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 522 PM CDT SAT JUL 8 2017 TXZ163-164-177-082245- Walker TX-Houston TX-Trinity TX- 522 PM CDT SAT JUL 8 2017 ...SPECIAL WEATHER STATEMENT... At 522 PM CDT, Doppler radar was tracking a strong thunderstorm 7 miles northeast of Lovelady, or 12 miles southeast of Crockett. This storm was nearly stationary. Winds in excess of 30 mph will be possible with this storm. Locations impacted include... Lovelady and Pennington. 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. 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 3105 9545 3123 9550 3130 9521 3113 9518 TIME...MOT...LOC 2222Z 318DEG 2KT 3117 9533
Special weather statement, Jul 8, 5:45 PM CDT, 30 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 545 PM CDT SAT JUL 8 2017 TXZ163-082300- Houston TX- 545 PM CDT SAT JUL 8 2017 ...SPECIAL WEATHER STATEMENT... At 544 PM CDT, Doppler radar was tracking a strong thunderstorm near Lovelady, or 7 miles south of Crockett, moving southeast at 5 mph. Winds in excess of 30 mph will be possible with this storm. Locations impacted include... locations south of Crockett. 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 3127 9556 3131 9541 3119 9535 3115 9554 TIME...MOT...LOC 2244Z 326DEG 6KT 3121 9548
Special weather statement, Jul 8, 5:48 PM CDT, 27 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
548 PM CDT SAT JUL 8 2017
TXZ163-082330-
Houston TX-
548 PM CDT SAT JUL 8 2017
...SPECIAL WEATHER STATEMENT...
At 547 PM CDT, Doppler radar was tracking strong thunderstorms near
Kennard, or 17 miles east of Crockett, moving southeast at 5 mph.
Winds in excess of 30 mph will be possible with these storms.
Locations impacted include...
Kennard and surrounding communities.
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.
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 3152 9510 3150 9509 3149 9511 3147 9510
3146 9507 3147 9506 3144 9504 3144 9501
3142 9500 3141 9498 3140 9498 3140 9497
3121 9523 3138 9537 3154 9513
TIME...MOT...LOC 2247Z 326DEG 6KT 3141 9519Special weather statement, Jul 8, 5:57 PM CDT, 18 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 557 PM CDT SAT JUL 8 2017 TXZ213-082330- Harris TX- 557 PM CDT SAT JUL 8 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL HARRIS COUNTY UNTIL 630 PM CDT... At 556 PM CDT, Doppler radar was tracking a strong thunderstorm in Houston centered over the northeast Loop 610, moving northwest at 10 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Galena Park, Jacinto City, Near Northside Houston, Greater Fifth Ward, Aldine, Downtown Houston, Memorial Park, Northside / Northline, Second Ward, Greater Greenspoint, Greater Heights, Spring Valley, Fourth Ward, Spring Branch North, Spring Branch West, Cloverleaf, Neartown / Montrose, Hilshire Village, Bush Intercontinental Airport and Spring Branch East. 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 2976 9517 2972 9523 2980 9555 3001 9535 TIME...MOT...LOC 2256Z 130DEG 10KT 2979 9529
Special weather statement, Jul 8, 6:00 PM CDT, 15 minutes before
Special Weather Statement National Weather Service Houston/Galveston TX 600 PM CDT SAT JUL 8 2017 TXZ177-082330- Walker TX- 600 PM CDT SAT JUL 8 2017 ...SPECIAL WEATHER STATEMENT... At 559 PM CDT, Doppler radar was tracking a strong thunderstorm 11 miles northwest of Huntsville, moving southeast at 5 mph. Winds in excess of 30 mph will be possible with this storm. Locations impacted include... Huntsville and Crabbs 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. 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 3079 9583 3088 9566 3076 9545 3060 9570 TIME...MOT...LOC 2259Z 318DEG 6KT 3079 9572
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 4:17 PM CDT | Special Weather Statement | HGX | Trinity | 43 min |
| Jul 8, 4:44 PM CDT | Areal Flood Advisory | HGX | Trinity | 61 min |
| Jul 8, 5:22 PM CDT | Special Weather Statement | HGX | Houston | 23 min |
| Jul 8, 5:45 PM CDT | Special Weather Statement | HGX | Houston | 15 min |
| Jul 8, 5:48 PM CDT | Special Weather Statement | HGX | Houston | 42 min |
| Jul 8, 5:57 PM CDT | Special Weather Statement | HGX | Harris | 33 min |
| Jul 8, 6:00 PM CDT | Special Weather Statement | HGX | Walker | 30 min |
| Jul 8, 6:56 PM CDT | Special Weather Statement | HGX | Harris | 49 min |
| Jul 8, 6:58 PM CDT | Special Weather Statement | HGX | Montgomery | 47 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2017Every severe thunderstorm warning 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.