Severe Thunderstorm Warning 249, NWS Greenville-Spartanburg, SC

293 
WWUS52 KGSP 281830
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
230 PM EDT FRI JUL 28 2017

SCC001-007-045-059-281845-
/O.CON.KGSP.SV.W.0249.000000T0000Z-170728T1845Z/
Laurens SC-Greenville SC-Anderson SC-Abbeville SC-
230 PM EDT FRI JUL 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHWESTERN LAURENS...SOUTHEASTERN GREENVILLE...EAST CENTRAL
ANDERSON AND NORTHEASTERN ABBEVILLE COUNTIES...

At 230 PM EDT, a severe thunderstorm was located 15 miles east of
Anderson, or 6 miles north of Honea Path, moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor hail damage to vehicles is expected. Expect wind 
         damage to trees and power lines. 

Locations impacted include...
Fountain Inn, Belton, Williamston, Honea Path, Fork Shoals,
Princeton, Hickory Tavern, Donalds and Ware Shoals.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Scattered trees and power lines will be blown down in the warned
area. Seek shelter inside an interior room.

This storm is producing frequent and intense lightning. Turn off
electrical appliances. Do not use corded telephones. Do not take a
bath or shower.

This storms is also producing extremely heavy rainfall. Flooding of
drainage ditches and low lying areas may occur. Small streams will
rise rapidly. Do not drive through areas where water is flowing over
the road.

Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.

&&

LAT...LON 3464 8244 3473 8216 3440 8217 3439 8223
      3441 8225 3439 8227 3437 8248 3461 8251
TIME...MOT...LOC 1830Z 252DEG 23KT 3454 8237 

HAIL...1.00IN
WIND...60MPH
 
$$

CDG

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
203 PM EDT Fri Jul 28 2017

.SYNOPSIS...
A strong cold front will cross the region from the west through
tonight. Cooler and drier air will arrive across the western
Carolinas and northeast Georgia through the weekend and linger
through the early part of next week. More typical summertime
conditions will return about the middle of next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 155 pm: Coverage actually diminished as previous widespread
showers and embedded storms moved into the western part of the
forecast area. However, as expected, scattered deeper convection has
been developing along the leading edge for the past hour or so. This
should continue to fill in a bit, as it moves into an area
characterized by 2500-3000 sbCAPE across the Piedmont and upper
support improves as height falls continue to overspread the area.
Height falls/tightening height gradient is expected to result in
improving shear throughout the afternoon, with 0-3km values likely
reaching 20-25 kts by late afternoon. This will be adequate to
support some degree of organization along cold pools, supporting a
risk of localized damaging winds, especially across the Piedmont.

The overnight period may see some lingering -shra and a couple tstms
over the far srn and ern zones with perhaps a few upslope -shra over
the wrn mtns. However, we will also have to watch for potential air
mass recovery ahead of the front across the TN Valley this
afternoon. If that happens, the combination of adequate buoyancy and
moderate shear will support the potential for development of
organized convection in these areas, which could approach the NC
mtns this evening. Otherwise...winds will shift n/ly and lowering
td/s will begin mixing in across the nrn zones. With winds remaining
elevated and mixed beneath a likely stcu deck...the possibility for
dense fg will remain fairly low outside sheltered mtn valleys and
fthill areas. Mins will remain above climo by a cat or so in this
setup.

&&

.SHORT TERM /SATURDAY THROUGH TUESDAY NIGHT/...
As of 300 AM EDT Friday: A pattern change is in store during the
short term, and it should be a welcome change. At the start of the
period, the surface front and associated initial vort max will have
passed just east of the area, with perhaps some lingering precip in
southeast zones, but the upper trough axis and primary vort max will
still be in place over the Appalachians with some northwest flow
showers possible early in the day. This will all dry out through the
day as much, much lower dewpoints advect into the region - at least
10 degrees lower Saturday afternoon than what we should see today.
This will be very noticeable with overnight lows Saturday night at
least 5 degrees below normal; mid 60s at best across the Piedmont
and 50s in the mountains. A nice, nice day expected on Sunday as the
trough digs through, with highs several (5-8) degrees below normal
on the backside of the upper trough with the CAA dominating.
Dewpoints in the 50s and really crazy pleasant for the last day in
July. There is some difference in placement of the upper trough
between the faster ECMWF and slower GFS, so if the latter works out
we could see a few more clouds.

Behind the trough axis, the Canadian surface high pressure will
begin building in more Sunday night into Monday, and though full sun
will allow temps to climb a couple of degrees higher than those on
Sunday, dewpoints will drop even further, with 50s in most areas and
even some 40s dewpoints showing up in the mountains during max
mixing. The upper wave will continue to broaden Monday night into
Tuesday as the surface high slides east across the mountains and
toward the Atlantic, with the airmass finally beginning to modify.
Still a couple of degrees below seasonal normals for Tuesday and
Tuesday night, but continued dry.

&&

.LONG TERM /WEDNESDAY THROUGH THURSDAY/...
As of 315 AM EDT Friday: During the dry short term, a shortwave will
dive out of the Rockies into the Southern Plains, reinforcing and
sharpening the broad trough already in place over the eastern third
of the country. Moisture will lift up from the Gulf, and the high
pressure in place over the western Carolinas and NE GA will continue
to modify, with dewpoints recovering into the 60s everywhere (though
still really not all that bad). A vort max sliding around the flow
at 500mb will push into the mountains, and with slowly increasing
moisture, should be enough for a return of some pops to the higher
terrain Wednesday afternoon. Flow aloft will transition to
southwesterly as the trough digs down the Mississippi Valley,
lifting more moisture out of the Gulf for Thursday. GFS is a little
slower with this return and again keeps convection mainly in the
mountains, but with the uncertainty, have trended back more toward
diurnal pops, but still slightly below seasonal normals for temps
(not too bad of a start to August!).

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
At KCLT and elsewhere: Showers and storms moving off the Blue Ridge
are expected to expand in coverage and intensity as they move east
across the area through late afternoon. Tempos for TSRA are included
at all terminals...beginning now at all sites except KCLT, and at
20Z at KCLT. Occl visby and/or cig restrictions are likely during
brief periods of heavy rain. Showers and storms are expected to
diminish in coverage from late afternoon into the early evening.
However, additional activity developing ahead of a cold front over
the TN Valley may then move into the area during mid/late evening.
VCSH and Prob30s therefore linger into the early part of the
overnight at all TAF sites. The concern then shifts to the potential
for fog and/or stratus late tonight, as low level moisture remains
plentiful, and mid/upper levels begin to dry. For the time being,
late night/early morning restrictions are confined to KAVL/KHKY, but
more widespread restrictions are certainly possible. SW winds may
gust at times this afternoon, diminishing to 5-10 kts by mid-evening
or so. Winds then shift to the NW at most terminals by mid-morning,
with speeds of 5-10 kts expected (10-15 kts and possibly gusty at
KAVL).

Outlook: Drier air will filter in from the north behind a passing
cold front this weekend. Chances for morning fog and stratus will
also be possible mainly in the mountain valleys. A typical
summer-time pattern is expected to return by the middle of next week.

Confidence Table...

            18-24Z        00-06Z        06-12Z        12-18Z
KCLT       High 100%     High  92%     High  94%     High 100%
KGSP       High  99%     High  98%     High  95%     High 100%
KAVL       High  99%     High  89%     Med   75%     High  89%
KHKY       High  91%     High  95%     High  81%     High  91%
KGMU       High  99%     High  97%     High  93%     High 100%
KAND       High  99%     High  96%     Med   74%     High  96%

The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables and ensemble forecasts
are available at the following link:

www.weather.gov/gsp/aviation

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.

&&

SYNOPSIS...TDP
NEAR TERM...JDL/SBK
SHORT TERM...TDP
LONG TERM...TDP
AVIATION...JDL

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
1120 AM EDT Fri Jul 28 2017

GAZ010-017-018-026-028-NCZ033-035-048>053-058-059-062>065-501>510-
SCZ001>006-010-291530-
Rabun-Habersham-Stephens-Franklin-Hart-Avery-Alexander-Madison-
Yancey-Mitchell-Swain-Haywood-Buncombe-Graham-Northern Jackson-Macon-
Southern Jackson-Transylvania-Henderson-Caldwell Mountains-
Greater Caldwell-Burke Mountains-Greater Burke-McDowell Mountains-
Eastern McDowell-Rutherford Mountains-Greater Rutherford-
Polk Mountains-Eastern Polk-Oconee Mountains-Pickens Mountains-
Greenville Mountains-Greater Oconee-Greater Pickens-
Greater Greenville-Anderson-
1120 AM EDT Fri Jul 28 2017

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...This Afternoon and Tonight.

Numerous showers and thunderstorms will move across the area this
afternoon. The main thunderstorm threats will be from cloud to ground
lightning, locally heavy rainfall, and gusty winds. However, isolated
strong to severe thunderstorms producing brief damaging winds and
localized flash flooding cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ029-NCZ036-037-056-057-068>072-082-SCZ007>009-011>014-019-291530-
Elbert-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Gaston-
Mecklenburg-Cabarrus-Union-Spartanburg-Cherokee-York-Abbeville-
Laurens-Chester-Greenwood-
1120 AM EDT Fri Jul 28 2017

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina and upstate South Carolina.

.DAY ONE...This Afternoon and Tonight.

Scattered to numerous thunderstorms are expected across the Piedmont
this afternoon. A few storms could become severe, with damaging
winds being the primary threat. Cloud to ground lightning and locally
heavy rainfall can occur with any thunderstorm. In addition,
localized flash flooding cannot be ruled out, especially in urban
areas along the I-77 corridor.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

LANE

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
101 PM EDT FRI JUL 28 2017

GAZ010-017-281730-
Rabun GA-Habersham GA-
101 PM EDT FRI JUL 28 2017

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT HABERSHAM
COUNTY UNTIL 130 PM EDT...

At 101 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning near Clarkesville, moving east at 25 mph.

Locations to be impacted include...
Clarkesville, Demorest, Tallulah Falls, Tallulah Gorge State Park,
Hollywood and Turnerville.

In addition to intense lightning, wind gusts up to 40 mph will be
possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3472 8363 3476 8332 3473 8335 3470 8335
      3469 8334 3467 8337 3453 8344 3454 8362
      3455 8362 3457 8363 3471 8364
TIME...MOT...LOC 1701Z 267DEG 24KT 3464 8355

CDG

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
144 PM EDT FRI JUL 28 2017

GAZ010-018-SCZ001-002-004-005-281830-
Rabun GA-Stephens GA-Pickens Mountains SC-Greater Pickens SC-
Greater Oconee SC-Oconee Mountains SC-
144 PM EDT FRI JUL 28 2017

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN STEPHENS...
NORTHEASTERN RABUN...SOUTHWESTERN PICKENS AND OCONEE COUNTIES UNTIL
230 PM EDT...

At 144 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from 9 miles east of Clayton to 3 miles west of
Walhalla to 6 miles east of Toccoa, and moving east at 40 mph.

Locations to be impacted include...
Clemson, Seneca, Walhalla, Central, Westminster, Six Mile, Salem,
Lake Keowee, Jocassee Gorges and Lake Jocassee.

Wind gusts up to 45 mph will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

&&

LAT...LON 3456 8329 3475 8321 3495 8330 3500 8313
      3500 8311 3505 8292 3481 8274 3465 8281
      3454 8293
TIME...MOT...LOC 1744Z 262DEG 39KT 3491 8325 3476 8313 3457 8321

CDG

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
145 PM EDT FRI JUL 28 2017

SCZ010-281815-
Anderson SC-
145 PM EDT FRI JUL 28 2017

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN ANDERSON COUNTY
UNTIL 215 PM EDT...

At 145 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles east of Hartwell, or near Starr, moving east at 30 mph.

Locations to be impacted include...
Anderson, Homeland Park, Iva, Starr, Anderson Airport, Lake Hartwell,
Broadway Lake and Sadlers Creek State Park.

Wind gusts up to 45 mph and pea size hail will be possible in these
areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

&&

LAT...LON 3428 8276 3430 8278 3434 8279 3437 8284
      3439 8284 3444 8286 3456 8255 3437 8249
      3430 8260 3429 8272
TIME...MOT...LOC 1745Z 254DEG 24KT 3438 8275

CDG

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
148 PM EDT FRI JUL 28 2017

NCZ065-509-510-SCZ003-006-007-281830-
Henderson NC-Polk Mountains NC-Eastern Polk NC-
Greenville Mountains SC-Spartanburg SC-Greater Greenville SC-
148 PM EDT FRI JUL 28 2017

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN HENDERSON...
SOUTHWESTERN POLK...NORTHEASTERN GREENVILLE AND NORTHWESTERN
SPARTANBURG COUNTIES UNTIL 230 PM EDT...

At 148 PM EDT, Doppler radar was tracking a strong thunderstorm 13
miles south of Hendersonville, or near Pleasant Ridge State Park,
moving east at 25 mph.

Locations to be impacted include...
Columbus, Landrum, Slater-Marietta, Tryon, Saluda, Tigerville,
Pleasant Ridge State Park, Lake Robinson, Jones Gap State Park and
North Saluda Reservoir.

Wind gusts up to 45 mph and pea size hail will be possible in these
areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

&&

LAT...LON 3503 8253 3521 8255 3528 8219 3501 8216
TIME...MOT...LOC 1748Z 265DEG 15KT 3513 8245

CDG

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
156 PM EDT FRI JUL 28 2017

GAZ029-SCZ011-281830-
Elbert GA-Abbeville SC-
156 PM EDT FRI JUL 28 2017

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
SOUTHEASTERN ELBERT AND SOUTHWESTERN ABBEVILLE COUNTIES UNTIL 230 PM
EDT...

At 156 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 14 miles southeast of Elberton, or near Lake Strom
Thurmond, moving east at 20 mph.

Locations to be impacted include...
Calhoun Falls, Lake Strom Thurmond, Bobby Brown State Park, Lake
Russell and Rice Town.

In addition to intense lightning, wind gusts up to 40 mph and pea
size hail will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3398 8261 3397 8264 3399 8265 3398 8273
      3410 8273 3415 8237 3406 8237 3406 8245
      3408 8248 3407 8250 3407 8253 3401 8260
      3399 8258 3398 8258 3396 8257
TIME...MOT...LOC 1756Z 269DEG 15KT 3401 8264

CDG