Tornado Watch 508

Issued

Oct 23, 2017, 2:00 PM EDT (18:00 UTC)

Expired

Oct 23, 2017, 10:00 PM EDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Columbia radar (KCAE), 135 km from the middle of the area, began a volume at 18:01 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

20%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1737Oct 23, 1:07 PM EDT
• Mesoscale Discussion 1738Oct 23, 4:33 PM EDT
• Mesoscale Discussion 1740Oct 23, 6:59 PM EDT
• Mesoscale Discussion 1741Oct 23, 7:34 PM EDT

003 
WWUS20 KWNS 231758
SEL8  
SPC WW 231758
GAZ000-NCZ000-SCZ000-CWZ000-240100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 508
NWS Storm Prediction Center Norman OK
200 PM EDT Mon Oct 23 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Extreme east central Georgia
  Western North Carolina
  Much of central and western South Carolina
  Coastal Waters

* Effective this Monday afternoon and evening from 200 PM until
  900 PM EDT.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Thunderstorms will intensify gradually this afternoon
along and ahead of a cold front moving from Georgia into western
South Carolina and North Carolina.  The storm environment will be
favorable for both supercells in the broken band of storms, and
ahead of the band, as well as mesovortices embedded in the line. 
These circulations will be capable of producing a few tornadoes and
damaging gusts through this evening.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 50 miles northwest of Greensboro NC to
50 miles south southwest of Orangeburg SC. 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.

&&

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 450. Mean
storm motion vector 21040.

...Thompson

Tornado Watches in South Carolina, 2017Tornado Watches in North Carolina, 2017Tornado Watches in Georgia, 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.