Alert archive / Texas / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 89, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 31, 2018, 10:16 PM CDT for Galveston 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
- Oct 31, 2018, 10:16 PM CDT (03:16 UTC)
- Expired
- Oct 31, 2018, 10:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Galveston County, TX
The radar
The Houston radar (KHGX), 32 km from the middle of the area, began a volume at 03:18 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 31, 3:02 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.3 hours before the alert went out and 180 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
- 1529 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 7.2
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 Oct 31, 9:56 PM CDT, 20 minutes earlier.
Area forecast discussion, Oct 31, 9:56 PM CDT, 20 minutes before
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</html>Hazardous weather outlook, Oct 31, 2:12 PM CDT, 8 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Houston/Galveston TX 212 PM CDT Wed Oct 31 2018 TXZ163-164-176>179-195>200-210>214-226-227-235>238-300-313- 335>338-436>438-011915- 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- 212 PM CDT Wed Oct 31 2018 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...This Afternoon and Tonight Widespread thunderstorms will continue across the area through the late evening ahead of a strong cold front. Some storms are expected to become severe with large hail, damaging winds and isolated tornadoes. Heavy rainfall is also likely with the stronger storms, however fast storm motions should limit flash flood potential. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorm chances will increase late this weekend and early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this evening. GMZ330-335-350-355-370-375-011915- 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- 212 PM CDT Wed Oct 31 2018 This hazardous weather outlook is for portions of Southeast Texas.. .DAY ONE...This Afternoon and Tonight Small craft advisories and exercise caution wording will be in effect both ahead of and behind a passing cold front tonight through tomorrow afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorm chances will increase late this weekend and early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Local storm report, Oct 31, 5:21 PM CDT, 4 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
521 PM CDT WED OCT 31 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM HEAVY RAIN 1 NNE UNIVERSITY OAKS 29.73N 95.34W
10/31/2018 M2.50 INCH HARRIS TX NWS EMPLOYEE
2.5 INCHES OF RAIN IN AN HOUR CAUSING STREET FLOODING
AROUND U OF HOUSTON NEAR FOOTBALL STADIUM. ABOUT 1.5FT
OF WATER OVER ROAD.
&&
EVENT NUMBER HGX1800201
39Special weather statement, Oct 31, 6:51 PM CDT, 3 hours 25 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
651 PM CDT WED OCT 31 2018
TXZ163-164-177>179-197>199-210>213-010045-
San Jacinto TX-Walker TX-Washington TX-Waller TX-Grimes TX-
Colorado TX-Polk TX-Inland Harris TX-Montgomery TX-Houston TX-
Austin TX-Trinity TX-
651 PM CDT WED OCT 31 2018
...LINE OF STRONG THUNDERSTORMS MOVING THROUGH AREA...
At 648 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Forest to near Huntsville to 8
miles west of Hempstead to near Schulenburg. Movement was east at 25
mph.
Half inch hail and winds in excess of 30 to 40 mph will be possible
with these storms. Rainfall amounts of 1 to 2 inches in an hour will
be possible with the storms.
Locations impacted include...
Conroe, Huntsville, Tomball, Navasota, Sealy, Hempstead, Willis,
Prairie View, Bellville, Columbus, Eagle Lake, Pinehurst, Apple
Springs, The Woodlands, Hockley, Trinity, Waller, Panorama Village,
Weimar and Onalaska.
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.
&&
A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Texas.
LAT...LON 3144 9501 3134 9496 3133 9490 3115 9486
3110 9470 3063 9503 2999 9568 2944 9650
2965 9686 2996 9657 3000 9659 3013 9633
3072 9575 3149 9517
TIME...MOT...LOC 2348Z 276DEG 21KT 3143 9505 3069 9558 3010 9622 2974
9689Special weather statement, Oct 31, 7:55 PM CDT, 2 hours 21 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
755 PM CDT WED OCT 31 2018
TXZ178-199-200-210>213-226-227-237-300-313-010200-
San Jacinto TX-Inland Brazoria TX-Waller TX-Northern Liberty TX-
Coastal Harris TX-Wharton TX-Colorado TX-Inland Harris TX-
Southern Liberty TX-Montgomery TX-Fort Bend TX-Austin TX-
755 PM CDT WED OCT 31 2018
...LINE OF STRONG THUNDERSTORMS MOVING TOWARDS THE HOUSTON AREA...
At 754 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles west of North Cleveland to near Katy to
9 miles east of Sublime. Movement was southeast at 35 mph.
Winds in excess of 30 mph will be possible with these storms. The
storms may also produce 1 inch of rain in an hour with frequent
lightning. A cold front will push through behind the storms.
Locations impacted include...
Northwestern Pasadena, Pearland, Sugar Land, Missouri City,
southeastern Conroe, Rosenberg, Stafford, South Houston, Bellaire,
Humble, West University Place, Katy, Richmond, El Campo, Galena Park,
Tomball, Jacinto City, Wharton, northwestern Liberty and Cleveland.
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.
&&
A Tornado Watch remains in effect until 1000 PM CDT for southeastern
Texas.
LAT...LON 2988 9584 3051 9525 3021 9467 2951 9535
2901 9631 2930 9661 2930 9660 2933 9657
2933 9656 2948 9670
TIME...MOT...LOC 0054Z 313DEG 30KT 3040 9522 2981 9574 2943 9665Special weather statement, Oct 31, 9:09 PM CDT, 1 hour 7 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 7:55 PM CDT | Special Weather Statement | HGX | Fort Bend, Harris, Liberty, Wharton | 65 min |
| Oct 31, 8:43 PM CDT | Tornado Warning | HGX | Harris | 17 min |
| Oct 31, 9:09 PM CDT | Special Weather Statement | HGX | Brazoria, Chambers, Jackson, Liberty, Matagorda | 66 min |
| Oct 31, 9:12 PM CDT | Special Marine Warning | HGX | 93 min | |
| Oct 31, 9:29 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Galveston | 31 min |
| Oct 31, 10:07 PM CDT | Areal Flood Advisory | HGX | Liberty | 3 hr |
| Oct 31, 10:16 PM CDT | Special Marine Warning | HGX | 89 min | |
| Oct 31, 10:44 PM CDT | Severe Thunderstorm Warning | HGX | Galveston | 31 min |
| Oct 31, 11:38 PM CDT | Special Marine Warning | HGX | 67 min | |
| Nov 1, 12:56 AM CDT | Special Marine Warning | HGX | 94 min | |
| Nov 1, 8:51 AM CDT | River Flood Warning | HGX | Matagorda, Wharton | 24 hr |
| Nov 1, 10:12 AM CDT | River Flood Warning | HGX | Brazoria, Fort Bend | 3 days |
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.