Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 34, NWS Greenville-Spartanburg, SC

May 10, 2018Cherokee County, Spartanburg County, South Carolina; Cleveland County, Rutherford County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 10, 2018, 5:19 PM EDT for Cherokee County, Spartanburg County, South Carolina; Cleveland County, Rutherford County, North Carolina. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 10, 2018, 5:19 PM EDT (21:19 UTC)
Expired
May 10, 2018, 6:00 PM EDT
In force
41 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cleveland County, NC, Rutherford County, NC, Cherokee County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 52 km from the middle of the area, began a volume at 21:20 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.

What was reported inside it

TimeReportWhereRemark
May 10, 5:21 PM EDTTSTM WND DMG2 Se Forest City, NCNUMEROUS TREES DOWN SOME BLOCKING ROADS FROM NEAR FOREST CITY TO ELLENBORO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 10, 4:23 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.3 hours before the alert went out and 198 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.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2018-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2018-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1686 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

391 
WUUS52 KGSP 102119
SVRGSP
NCC045-161-SCC021-083-102200-
/O.NEW.KGSP.SV.W.0034.180510T2119Z-180510T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
519 PM EDT THU MAY 10 2018

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rutherford County in western North Carolina...
  Southern Cleveland County in the Piedmont of North Carolina...
  Northeastern Spartanburg County in Upstate South Carolina...
  Northwestern Cherokee County in Upstate South Carolina...

* Until 600 PM EDT.

* At 519 PM EDT, a severe thunderstorm was located 6 miles southeast
  of Forest City, or 4 miles southwest of Ellenboro, moving southeast
  at 20 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...
  Shelby, Gaffney, Forest City, Boiling Springs NC, Cowpens, Mayo,
  Chesnee, Patterson Springs, Ellenboro and Lattimore.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3524 8135 3496 8182 3519 8200 3519 8197
      3522 8197 3522 8196 3523 8197 3525 8196
      3541 8180
TIME...MOT...LOC 2119Z 297DEG 17KT 3527 8180 

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

Carroll
2 follow-up statements
054 
WWUS52 KGSP 102144
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
544 PM EDT THU MAY 10 2018

NCC045-161-SCC021-083-102200-
/O.CON.KGSP.SV.W.0034.000000T0000Z-180510T2200Z/
Rutherford NC-Cleveland NC-Spartanburg SC-Cherokee SC-
544 PM EDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN RUTHERFORD...SOUTHERN CLEVELAND...NORTHEASTERN
SPARTANBURG AND NORTHWESTERN CHEROKEE COUNTIES...

At 544 PM EDT, a severe thunderstorm was located 8 miles southwest of
Shelby, or near Boiling Springs NC, moving southeast at 20 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...
Shelby, Gaffney, Boiling Springs NC, Cowpens, Mayo, Chesnee,
Patterson Springs, Ellenboro, Lattimore and Mooresboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3524 8135 3496 8182 3519 8200 3519 8197
      3522 8197 3522 8196 3523 8197 3537 8169
TIME...MOT...LOC 2144Z 297DEG 17KT 3522 8167 

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

Carroll
977 
WWUS52 KGSP 102157
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
557 PM EDT THU MAY 10 2018

NCC045-161-SCC021-083-102207-
/O.EXP.KGSP.SV.W.0034.000000T0000Z-180510T2200Z/
Rutherford NC-Cleveland NC-Spartanburg SC-Cherokee SC-
557 PM EDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RUTHERFORD...
SOUTHERN CLEVELAND...NORTHEASTERN SPARTANBURG AND NORTHWESTERN
CHEROKEE COUNTIES WILL EXPIRE AT 600 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty winds
AND heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
western and the Piedmont of North Carolina...and Upstate South
Carolina.

LAT...LON 3524 8135 3496 8182 3519 8200 3519 8197
      3522 8197 3522 8196 3523 8197 3537 8169
TIME...MOT...LOC 2157Z 297DEG 17KT 3519 8161 

$$

Carroll

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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 10, 5:17 PM EDT, 2 minutes earlier.

Area forecast discussion, May 10, 5:17 PM EDT, 2 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
517 PM EDT Thu May 10 2018

.SYNOPSIS...
Showers and thunderstorms continue through this evening as a cold
front crosses the area. Mainly mountain afternoon and evening
thunderstorms are expected Friday and Saturday. Temperatures will
increase to near record levels by Sunday then slowly cool through
next week. Precipitation chances gradually increase through next
week as a complex low pressure system impacts the area.

&&

.NEAR TERM /THROUGH FRIDAY/...
As of 505 PM EDT: over the past couple of hours, we've been watching
a line of fairly strong convection move eastward from the higher
terrain. The strongest cells have developed over the NC Foothills
and have produced large hail and gusty winds. The the latest runs of
the CAMS have slowed the progression of this line down by a couple
of hours or so compared to earlier runs. Otherwise, the main
convection should exit east of the area by 01Z or so. Isolated
showers may continue to arrive in the northwest flow across the
southwest mountains through midnight before dissipating. Locations
receiving heavy rain this afternoon/evening, as well as the mountain
river valleys, could well see fog and low clouds toward daybreak
Friday. Mild mins should run 5 to 10 degrees above climatology.

Flat mid-upper ridging will develop over the southeast on Friday,
but a very weak H5 trough embedded in the ridge could provide weak
afternoon forcing over the NC mountains. A weak lee trough should
develop just east of the Blue Ridge as well to toggle winds back
toward southwesterly. Anticipate max temps warming at least a couple
of degrees above Thursday values, with isolated to scattered diurnal
convection focused mainly along the eastern slopes of the
mountains.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
As of 215 PM EDT Thursday: Weak upper shortwave will be passing
across the area, embedded in the flow atop the Gulf/Caribbean upper
ridge, at the beginning of the period. Any lingering convection from
Friday night should dissipate quickly on the back side of the wave.
For Saturday afternoon, continued mid-level warming with the upper
ridge in place and a weak surface trough in place should continue
the low-level WAA, resulting in afternoon highs a couple of degrees
warmer than what we'll see on Friday, with just about everywhere
across the Piedmont progged to reach the 90-degree mark. Without
upper support, convection will be limited to just the airmass
instability and mechanical lift from the mountains, so have dropped
most of the pops from the Piedmont. Thicknesses will increase
further still on Sunday as a broad upper trough remains in place
over E Canada and ridging amplifies over the center of the country.
The big story here will be the record-level highs; currently have a
record forecast for CLT, which will break a record that has been in
place for 137 years! Luckily dewpoints won't be ridiculous, so, so
far, no real concerns with heat indices. Very little change in low
temps through the period (actually, through the extended,
too...maybe fluctuating by 5 degrees through the end of next week).
Mid-level warming/subsidence will continue to increase, and this
will significantly limit convective potential even over the
mountains, with only some pockets of slight chance pops forecast at
this time.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
As of 230 PM EDT Thursday: Still no major changes to the extended
from previous forecasts. With the subtropical ridge continuing in
place, Monday should be very similar to Sunday, maybe a degree or
two cooler, and with slightly more convection especially over the
mountains, but cannot rule out isolated activity over the Piedmont
as well.

Things start changing as we move into Tuesday and through the rest
of the period. A tropical weakness in the Gulf will strengthen just
slightly on Sunday, spinning near the FL Big Bend on Monday and
beginning to drift north into the Southeast Monday night and
Tuesday. Increasing cloud cover and precip chances will be expected,
and a corresponding decrease in afternoon highs (still above normal
though). From Tuesday through the end of the period, it looks fairly
wet...though QPF amounts aren't particularly impressive, low-level
moisture will remain high and thus higher pops are warranted, with
the best chances Wednesday afternoon where we have likely pops
painted across the area. Airmass instability will remain but lapse
rates in the tropical environment unimpressive, so some question as
to how much showery vs. thundery activity there will be. A shortwave
trough pushing toward the OH Valley at the end of the period will
slowly absorb the tropical low, but the tropical moisture feed from
the western Caribbean will continue so chance pops remain in the
forecast, with highs remaining 3-5 degrees above normal.

&&

.AVIATION /21Z THURSDAY THROUGH TUESDAY/...
At KCLT and Elsewhere: There is reasonably good consensus on the
foothills convection developing into a broken line across the NC
piedmont late this afternoon and impacting KCLT mainly from 21Z to
23Z. Reasonably good cold pool winds of 25 to 30 kt should be
expected from the WNW, and gusts could reach quite a bit higher if
the convective strength builds into the stronger piedmont DCAPE
area. Convection should be a bit spottier elsewhere, with KHKY to
KAVL seeing the next best chance, but more scattered activity across
the Upstate terminal area. Will handle with mainly a VCTS in
southern sections. Any restrictions through the evening hours will
be brief MVFR to possibly IFR under the heaviest downpours.

Any locations that receive rain late today will be a candidate for
fog/stratus development toward daybreak Friday. Chances appear best
at KCLT and also in the mountain river valleys. Will remain fairly
conservative for now given the reserved MOS forecasts, but will
definitely hint that way at KCLT with some morning SCT007 along with
MVFR fog. Convective coverage should be quite a bit less on Friday,
with no mention before 18Z throughout, and nothing after 18Z at
KCLT. Winds will toggle back to SW with lee troughing early Friday,
except mainly NW at KAVL.

Outlook: Isolated to scattered diurnal convection will likely return
mainly over the higher terrain on Friday afternoon and into the
weekend. Any restrictions should be confined to areas under
showers/thunderstorms or daybreak fog/stratus in the lower mountain
valleys.

Confidence Table...

            21-03z        03-09Z        09-15Z        15-18Z
KCLT       High 100%     High 100%     Low   47%     High 100%
KGSP       High 100%     High 100%     High 100%     High 100%
KAVL       High 100%     High 100%     Low   47%     High 100%
KHKY       High 100%     High 100%     High 100%     High 100%
KGMU       High 100%     High 100%     High 100%     High 100%
KAND       High 100%     High 100%     High 100%     High 100%

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

&&

.CLIMATE...
RECORDS FOR 05-10

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      89 1936     53 1924     65 1927     32 1966
                1896                                1906
   KCLT      94 1896     59 1966     70 1927     38 1906
                1889
   KGSP      96 1889     56 1924     71 1895     32 1906

RECORDS FOR 05-11

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      89 1889     50 1960     64 1890     30 1966
   KCLT      95 1916     58 1924     70 1889     39 1977
                1896
                1889
   KGSP      96 1889     59 1924     69 1963     33 1906

RECORDS FOR 05-12

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      88 1980     44 1960     65 1918     36 1969
                1956
                1914
   KCLT      94 1889     56 1960     69 1896     39 1969
   KGSP      99 1916     56 1960     68 1979     38 1989
                                        1933
RECORDS FOR 05-13

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      90 1933     54 1917     67 1890     31 1895
   KCLT      93 1881     59 1891     73 1881     38 1960
   KGSP      95 1886     62 1972     71 1933     37 1917
                            1954
                            1938

RECORDS FOR 05-14

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      89 1956     52 1954     63 1962     30 1895
                1896                    1908
   KCLT      95 1956     53 1954     73 1881     41 2013
                                                    1917
   KGSP      95 1886     52 1954     71 1933     41 2013
                                                    1960
                                                    1917

&&

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

&&

SYNOPSIS...RWH
NEAR TERM...JPT
SHORT TERM...TDP
LONG TERM...TDP
AVIATION...HG/JPT
CLIMATE...TDP
Hazardous weather outlook, May 10, 4:31 PM EDT, 48 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
431 PM EDT Thu May 10 2018

GAZ010-017-018-NCZ033-048>053-058-059-062>065-501>506-SCZ001>006-
112045-
Rabun-Habersham-Stephens-Avery-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-Oconee Mountains-
Pickens Mountains-Greenville Mountains-Greater Oconee-
Greater Pickens-Greater Greenville-
431 PM EDT Thu May 10 2018

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

.DAY ONE...Tonight.

Scattered to numerous thunderstorms are developing ahead of a cold
front approaching from the west this afternoon. Some of the
thunderstorms could become severe over the foothills and especially
the piedmont through early this evening. Cloud-to-ground lighting,
briefly heavy rainfall, and gusty winds can be expected with any of
these storms. Some of the strongest thunderstorms will be capable of
producing quarter-sized hail and damaging wind gusts. The storms
should move away to the east by around sunset.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

..Friday...No hazardous weather is expected at this time.
..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.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are requested to forward any reports of large hail,
damaging winds, tornadoes, or flash flooding to our office.

NCZ035>037-056-057-068>072-082-507>510-SCZ007>009-013-014-112045-
Alexander-Iredell-Davie-Catawba-Rowan-Cleveland-Lincoln-Gaston-
Mecklenburg-Cabarrus-Union-Rutherford Mountains-Greater Rutherford-
Polk Mountains-Eastern Polk-Spartanburg-Cherokee-York-Chester-
431 PM EDT Thu May 10 2018

...SEVERE THUNDERSTORM WATCH 80 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

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

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

..Friday...No hazardous weather is expected at this time.
..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.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are requested to forward any reports of large hail,
damaging winds, tornadoes, or flash flooding to our office.

GAZ026-028-029-SCZ010>012-019-112045-
Franklin-Hart-Elbert-Anderson-Abbeville-Laurens-Greenwood-
431 PM EDT Thu May 10 2018

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

.DAY ONE...Tonight.

Scattered thunderstorms are developing ahead of a cold front
approaching from the west. Cloud-to-ground lighting, briefly heavy
rainfall, and gusty winds can be expected with any of these storms.
One or two of the thunderstorms may become strong enough to produce
large hail and damaging wind gusts. The storms should move away to
the east by around sunset.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

..Friday...No hazardous weather is expected at this time.
..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.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are requested to forward any reports of large hail,
damaging winds, tornadoes, or flash flooding to our office.

In the hours before

Special weather statement, May 10, 4:54 PM EDT, 25 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
454 PM EDT THU MAY 10 2018

NCZ035-036-056-069-502-504-508-102130-
Greater Rutherford NC-Iredell NC-Lincoln NC-Greater Burke NC-
Greater Caldwell NC-Alexander NC-Catawba NC-
454 PM EDT THU MAY 10 2018

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
CATAWBA...NORTHEASTERN RUTHERFORD...SOUTHWESTERN ALEXANDER...
NORTHWESTERN LINCOLN...WEST CENTRAL IREDELL...SOUTHEASTERN CALDWELL
AND SOUTHEASTERN BURKE COUNTIES UNTIL 530 PM EDT...

At 454 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 7 miles north of Newton, or 4 miles east of St.
Stephens, moving east at 30 mph.

Locations to be impacted include...
Hickory, Newton, St. Stephens, Conover, Longview, Granite Falls,
Valdese, Bethlehem, Icard and Hildebran.

In addition to intense lightning, wind gusts up to 50 mph and dime
size hail will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

This storm may intensify, so be certain to monitor local radio and tv
stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
western and the Piedmont of North Carolina.

LAT...LON 3574 8089 3555 8130 3555 8151 3557 8154
      3556 8157 3557 8160 3556 8166 3558 8169
      3555 8169 3555 8182 3564 8184 3589 8129
TIME...MOT...LOC 2054Z 286DEG 27KT 3577 8120

Carroll
Special weather statement, May 10, 4:59 PM EDT, 20 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
459 PM EDT THU MAY 10 2018

NCZ064-SCZ002-003-005-102130-
Transylvania NC-Pickens Mountains SC-Greater Pickens SC-
Greenville Mountains SC-
459 PM EDT THU MAY 10 2018

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
SOUTHEASTERN TRANSYLVANIA...NORTHWESTERN GREENVILLE AND NORTHWESTERN
PICKENS COUNTIES UNTIL 530 PM EDT...

At 459 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 12 miles northwest of Pickens, or 4 miles north of
Jocassee Gorges, moving east at 20 mph.

Locations to be impacted include...
Pickens, Jocassee Gorges, Table Rock State Park, Keowee Toxaway State
Park, Caesars Head State Park, Lake Jocassee, Jones Gap State Park,
Gorges State Park, Lake Keowee and Pumpkintown.

In addition to intense lightning, wind gusts up to 45 mph and dime
size hail will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

This storm may intensify, so be certain to monitor local radio and tv
stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

LAT...LON 3501 8293 3501 8291 3503 8292 3505 8290
      3505 8292 3511 8292 3513 8259 3487 8261
      3493 8291 3494 8290 3495 8291 3496 8291
      3498 8293
TIME...MOT...LOC 2059Z 272DEG 18KT 3502 8284

Carroll
Special weather statement, May 10, 5:07 PM EDT, 12 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
507 PM EDT THU MAY 10 2018

NCZ509-510-SCZ003-006-007-102130-
Polk Mountains NC-Eastern Polk NC-Greenville Mountains SC-
Spartanburg SC-Greater Greenville SC-
507 PM EDT THU MAY 10 2018

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
SOUTHWESTERN POLK...NORTHEASTERN GREENVILLE AND NORTHWESTERN
SPARTANBURG COUNTIES UNTIL 530 PM EDT...

At 507 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 7 miles south of Columbus, or near Campobello,
moving southeast at 30 mph.

Locations to be impacted include...
Landrum, Inman, Tryon, Campobello, Saluda, Lake Bowen, Gowensville
and Glassy Mountain.

In addition to intense lightning, wind gusts up to 50 mph and dime
size hail will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Gusty winds can blow down trees that are dead, or that have weakened
root systems. Outdoor furniture and similar items can be tossed
around if not anchored. Seek shelter indoors.

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.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
western North Carolina...and Upstate South Carolina.

LAT...LON 3503 8230 3524 8236 3525 8235 3522 8213
      3502 8199 3500 8221 3498 8228
TIME...MOT...LOC 2107Z 323DEG 27KT 3514 8218

Carroll
Local storm report, May 10, 5:08 PM EDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
508 PM EDT THU MAY 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0507 PM     HAIL             TRYON                   35.21N 82.24W
05/10/2018  E0.25 INCH       POLK               NC   911 CALL CENTER

&&

TPALMER
Local storm report, May 10, 5:10 PM EDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
510 PM EDT THU MAY 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HAIL             TAYLORSVILLE            35.92N 81.18W
05/10/2018  E1.00 INCH       ALEXANDER          NC   BROADCAST MEDIA

            MOSTLY NICKEL HAIL BUT SOME BIGGER.

&&

TPALMER
Special weather statement, May 10, 5:19 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
519 PM EDT THU MAY 10 2018

NCZ509-510-102245-
Polk Mountains NC-Eastern Polk NC-
519 PM EDT THU MAY 10 2018

...AN AREA OF HEAVY RAIN WILL IMPACT POLK COUNTY UNTIL 645 PM EDT...

At 517 PM EDT, Emergency management reported that the heavy rain
that has fallen across Polk County has resulted in very high flows
in area creeks and rivers.

Locations to be impacted include...
Columbus, Tryon, Mill Spring, Green Creek and Lake Adger.

Extreme rainfall rates in excess of 3 inches per hour have been
observed in these areas. Ponding of water on roads and low-lying
areas will continue. Creeks may briefly come out of their banks. The
heavy rain is moving out of the county but expect continued rises
until the water is routed downstream.

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.

These storms may intensify, so be certain to monitor local radio and
tv stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
western North Carolina.

LAT...LON 3534 8208 3530 8203 3528 8200 3527 8200
      3525 8197 3519 8197 3519 8205 3520 8228
      3527 8229 3540 8213 3539 8213
TIME...MOT...LOC 2117Z 303DEG 14KT 3528 8202 3519 8218

TDP

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 1:37 PM EDTSpecial Weather StatementGSPOconee23 min
May 10, 3:13 PM EDTSevere Thunderstorm WarningGSPSpartanburg47 min
May 10, 3:46 PM EDTSpecial Weather StatementGSPOconee29 min
May 10, 3:58 PM EDTSevere Thunderstorm WarningGSPGreenville, Spartanburg47 min
May 10, 4:36 PM EDTSpecial Weather StatementGSPOconee39 min
May 10, 4:59 PM EDTSpecial Weather StatementGSPPickens31 min
May 10, 5:12 PM EDTSevere Thunderstorm WarningGSPGreenville, Spartanburg48 min
May 10, 5:24 PM EDTSevere Thunderstorm WarningGSPGreenville, Pickens40 min
May 10, 5:34 PM EDTSpecial Weather StatementGSPOconee, Pickens41 min
May 10, 6:02 PM EDTSpecial Weather StatementGSPCherokee, Spartanburg43 min
May 10, 6:14 PM EDTSpecial Weather StatementGSPAnderson46 min
May 10, 6:36 PM EDTSpecial Weather StatementGSPCherokee, Union, York39 min
May 10, 7:01 PM EDTSevere Thunderstorm WarningGSPLaurens, Spartanburg, Union44 min
May 10, 7:18 PM EDTSpecial Weather StatementGSPLaurens27 min
May 10, 1:33 PM EDTSpecial Weather StatementGSPBurke27 min
May 10, 1:58 PM EDTSpecial Weather StatementGSPBurke32 min
May 10, 2:09 PM EDTSpecial Weather StatementGSPAvery, Mitchell36 min
May 10, 2:15 PM EDTSevere Thunderstorm WarningGSPPolk, Rutherford45 min
May 10, 2:27 PM EDTSpecial Weather StatementGSPBurke33 min
May 10, 2:42 PM EDTSpecial Weather StatementGSPHenderson33 min
May 10, 2:52 PM EDTSevere Thunderstorm WarningGSPPolk23 min
May 10, 2:56 PM EDTSpecial Weather StatementGSPAvery, Mitchell34 min
May 10, 3:00 PM EDTSpecial Weather StatementGSPGraham30 min
May 10, 3:04 PM EDTSpecial Weather StatementGSPBurke26 min
May 10, 3:28 PM EDTSpecial Weather StatementGSPBurke47 min
May 10, 3:33 PM EDTSpecial Weather StatementGSPGraham, Swain42 min
May 10, 3:35 PM EDTSpecial Weather StatementGSPPolk25 min
May 10, 3:50 PM EDTSpecial Weather StatementGSPHaywood25 min
May 10, 3:55 PM EDTSevere Thunderstorm WarningGSPBurke, Catawba, Lincoln50 min
May 10, 4:07 PM EDTSpecial Weather StatementGSPJackson38 min
May 10, 4:12 PM EDTSpecial Weather StatementGSPBurke33 min
May 10, 4:18 PM EDTSpecial Weather StatementGSPAlexander, Iredell42 min
May 10, 4:31 PM EDTSevere Thunderstorm WarningGSPAlexander, Iredell44 min
May 10, 4:46 PM EDTSevere Thunderstorm WarningGSPHenderson, Polk, Rutherford44 min
May 10, 4:54 PM EDTSpecial Weather StatementGSPCatawba36 min
May 10, 5:07 PM EDTSpecial Weather StatementGSPPolk23 min
May 10, 5:15 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan45 min
May 10, 5:19 PM EDTSpecial Weather StatementGSPPolk86 min
May 10, 5:39 PM EDTSpecial Weather StatementGSPCabarrus51 min
May 10, 6:00 PM EDTSpecial Weather StatementGSPDavie, Rowan30 min
May 10, 7:20 PM EDTSpecial Weather StatementGSPUnion25 min
May 10, 7:42 PM EDTSpecial Weather StatementGSPUnion33 min
May 10, 7:49 PM EDTSevere Thunderstorm WarningGSPUnion26 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2018Severe Thunderstorm Warnings in North Carolina, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.