Tornado Watch 465

Issued

Aug 25, 2017, 2:02 PM CDT (19:02 UTC)

Expired

Aug 26, 2017, 2:00 AM CDT

In force

12 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

Counties Cameron Parish, LA, Vermilion Parish, LA, Aransas County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Fort Bend County, TX, Galveston County, TX, Goliad County, TX, Harris County, TX, Jackson County, TX, Jefferson County, TX, Matagorda County, TX, Refugio County, TX, Victoria County, TX, Wharton County, TX

The Houston radar (KHGX), 71 km from the middle of the area, began a volume at 19:06 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

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 1564Aug 25, 10:19 AM CDT
• Mesoscale Discussion 1566Aug 25, 3:46 PM CDT
• Mesoscale Discussion 1569Aug 25, 7:36 PM CDT
• Mesoscale Discussion 1570Aug 25, 11:30 PM CDT
• Mesoscale Discussion 1571Aug 26, 1:17 AM CDT

597 
WWUS20 KWNS 251859
SEL5  
SPC WW 251859
LAZ000-TXZ000-CWZ000-260700-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 465
NWS Storm Prediction Center Norman OK
200 PM CDT Fri Aug 25 2017

The NWS Storm Prediction Center has issued a

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

* Effective this Friday afternoon and Saturday morning from 200
  PM until 200 AM CDT.

* Primary threats include...
  A couple tornadoes possible
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...A couple tornadoes will be possible through tonight within
the outer bands of Hurricane Harvey.

The tornado watch area is approximately along and 65 statute miles
either side of a line from 70 miles southeast of Lake Charles LA to
30 miles southwest of Victoria TX. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU5).

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.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 09030.

...Grams

Tornado Watches in Texas, 2017Tornado Watches in Louisiana, 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.