Tornado Watch 468

Issued

Aug 26, 2017, 12:50 PM CDT (17:50 UTC)

Expired

Aug 27, 2017, 2:00 AM CDT

In force

13 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

55 kt

Counties Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The Houston radar (KHGX), 9 km from the middle of the area, began a volume at 17:53 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.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

10%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

30%

• Mesoscale Discussion 1573Aug 26, 11:20 AM CDT
• Mesoscale Discussion 1576Aug 26, 3:44 PM CDT
• Mesoscale Discussion 1579Aug 26, 6:00 PM CDT
• Mesoscale Discussion 1581Aug 26, 9:37 PM CDT

084 
WWUS20 KWNS 261742
SEL8  
SPC WW 261742
LAZ000-TXZ000-CWZ000-270700-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 468
NWS Storm Prediction Center Norman OK
1245 PM CDT Sat Aug 26 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Far southwest Louisiana
  Southeast Texas
  Coastal Waters

* Effective this Saturday and Sunday morning from 1245 PM until
  200 AM CDT.

* Primary threats include...
  A few tornadoes and a couple intense tornadoes possible

SUMMARY...Sporadic rotating storms in the outer bands of tropical
cyclone Harvey will pose a risk for a few tornadoes into tonight.

The tornado watch area is approximately along and 85 statute miles
either side of a line from 40 miles west southwest of Angleton TX to
40 miles east of Port Arthur TX. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU8).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...This tornado watch replaces tornado
watch number 467. Watch number 467 will not be in effect after
1245 PM CDT. 

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 19040.

...Grams

Tornado Watches in Texas, 2017Every tornado watch in 2017

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.