North Carolina, 2016

Damaging Wind in North Carolina, July 20, 2016

July 20, 2016 · NWS GSP · 1 event in 1 county or zone

Isolated thunderstorms developed along the Blue Ridge during the late afternoon and evening. One storm became briefly severe near Marion.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GSP wrote it up.

Isolated thunderstorms developed along the Blue Ridge during the late afternoon and evening. One storm became briefly severe near Marion.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Jul 20, 1:48 PM EST, 3 hours 58 minutes earlier.

Area forecast discussion, Jul 20, 1:48 PM EST, 3 hours 58 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
248 PM EDT WED JUL 20 2016

.SYNOPSIS...
A typical Bermuda high pressure pattern will set up across the
region through the end of the week, resulting in typical midsummer
conditions. Hot high pressure will strengthen this weekend, then a
weak cold front will approach from the northwest early next week.

&&

.NEAR TERM /THROUGH THURSDAY/...
As of 230 PM Wednesday...finally seeing convective initiation over
the ridgetops of the Smokies. we await for more cells to appear on
radar over the higher terrain where satellite imagery shows enhanced
cu. Nothing in the recent CAM guidance to suggest that our fcst is
out of line, so few changes were made to the fcst. For the most
part, the activity that develops should diminish with sunset.

However...there is growing uncertainty about how the overnight hours
will play out. The operational models keep developing precip over
the Savannah R basin well into the early morning hours on Thursday,
evidently owing in part to a remnant MCV left over from convection
over the Midwest, perhaps aided by the development of a light SE
flow this evening. The idea of a remnant coming down from the NNW is
supported by the overall pattern with the western Carolinas on the
periphery of the large anticyclone over the Plains. Ordinarily the
operational models might be discounted, but the CAMS all keep some
amount of convection in this area into the overnight hours, so they
all must be catching on to something. The previous forecast was dry,
so a trend toward maintaining at least widely scattered deep
convection over northeast GA, the wrn Upstate, and near the Blue
Ridge in NC past midnight. Will still allow convection to dissipate
by daybreak, but that idea is not entirely supported by the
guidance. The guidance goes on to initiate convection early on
Thursday, what with the ongoing low level forcing and increase in
low level moisture. Forecast soundings show enough mid-level dry air
and a deep enough boundary layer to suggest a potential for wet
microbursts in the afternoon, thus the recent upgrade on the SPC
Day2 outlook to Marginal appears warranted. The fcst will also trend
in that direction. More cloud cover and earlier convection should
mean temps would not get quite as warm, and the consensus of the
guidance is to lower high temps a degree or so.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/...
As of 200 PM Wed: Monstrous upper ridge will extend virtually from
coast to coast Thursday evening, but retrogrades and is suppressed
a bit over the subsequent 48 hours as a trough crosses the NW
CONUS. We'll see some influence from the ridge, but also from
Western Atlantic high pressure that generally will maintain moist
southerly flow into the area early in the period. Anticipated precip
chances and t-storm threats will be typical of late July. Model QPF
response hints that this flow may be able to keep some convection
going well into Thursday night, but prog profiles suggest low
level lapse rates will be rather poor. A mostly slight chance
PoP is maintained along/south of the Blue Ridge into early Fri
morning. PoPs redevelop diurnally Friday. Max temps will be 4-6
degrees above normal, with heat indices maxing out around 100.

Friday night, a weak front will settle into the area from the
north, associated with low pressure moving into the Canadian
Maritimes. It looks like the front will be too weak to have an
impact overnight, but it will slightly enhance convective chances
Saturday before washing out. Winds do veer to downslope aloft in its
wake; this combined with still higher partial thicknesses implies
even hotter conditions. Maxes in the upper 90s are fcst acrs the
Piedmont. Dewpoints are expected to mix out slightly, into the
upper 60s, and resulting heat indices top out generally just shy
of Heat Advisory criteria. For now we will maintain a HWO mention,
but there is a good chance that an advisory will be posted Friday if
not tomorrow to highlight a heat wave lasting into early next week.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
As of 215 PM Wednesday...A broad upper ridge centered near Arkansas
at 00Z Sunday will strengthen eastward into Sunday with height rises
and a 594 decameters center over our region.  This ridge center will
slowly shift off the Carolina coast or just move a bit south early in
the week as some trofiness in the 500mb pattern develops.  The ECMWF
takes the 594 ridge center off the Carolina coast while the GFS
takes it from TN and NC south to SRN GA through mid week.  Hot and
very humid conditions will be in place Sunday with dewpoints in the
lower 70s in the foothills and piedmont and heat indices up to 104.
As a weak cold front gets closer from the northwest early in the
week coverage of SHRA and TSRA will increase mainly for the mtns and
max temps will be a bit lower. Heat indices of 102 in the CLT area
Monday PM and only in the 90s foothills and piedmont Tuesday.
Good CAPE values of at least 2000 for SW mtns and along and south of
I-85 each PM. Light low level SW to W wind through the period.

Highs in the 80s to lower 90s mtns to upper 90s piedmont on Sunday.
About 2 degrees cooler on Monday and still about 2 more degrees
cooler on Tuesday. Mins 60s to around 70 mtns to mid 70s piedmont.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
At KCLT...VFR expected thru the period, provided that an isolated
shower or storm does not form at the site unexpectedly. Cloud base
for few cu should lift to 050 or greater by the start of the period.
Wind should be light from the NE through the afternoon. Think chance
of precip restriction is too low to mention. Wind should come around
to something S of E this evening, perhaps initially on an outflow
boundary. Models retain quite a bit of low/mid level moisture
overnight and Thursday morning, so some cloud cover is expected
mainly at mid levels.

Elsewhere...kind of tricky. The model guidance seems to be latching
onto some remnant feature, perhaps from convection over the Midwest,
to redevelop and keep some convective precip going overnight mainly
in the Savannah R basin. The GFS in particular is keen on keeping
something in that area thru the overnight and then redeveloping with
early convective initiation Thursday morning. This would be
discounted if not for agreement with several of the convection
allowing models. So, we view this with caution. The biggest threat
would be to KAND. This could at a minimum develop and keep a low
cloud deck over the area through Thursday morning. Will start a
trend in that direction with a VCSH at KAND overnight and advise the
next shift to be on the lookout for greater potential for low
cloud/vis restrictions. An earlier convective initiation suggests
introducing a PROB30 at KAVL in the late morning Thursday. The rest
of the TAFs keep the precip out thru the end of the period. Winds
will come around to light SE or S overnight.

Outlook: Expect to revert to fairly typical midsummer weather with
afternoon showers and thunderstorms during the latter part of the
week. Morning fog and low stratus will be possible each day in the
mountain valleys and also in locations that received heavy rainfall
in the preceding afternoon/evening.

Confidence Table...

            18-24Z        00-06Z        06-12Z        12-18Z
KCLT       High 100%     High 100%     High  89%     High  90%
KGSP       High 100%     High 100%     High  86%     High  94%
KAVL       High 100%     High 100%     Med   62%     High  85%
KHKY       High 100%     High 100%     High  86%     High  94%
KGMU       High 100%     High 100%     High 100%     High 100%
KAND       High 100%     High 100%     High  94%     High  94%

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 07-22

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      96 1926     67 1970     75 1983     52 1966
   KCLT     103 1926     71 1929     80 1881     58 2001
   KGSP     101 1983     70 1970     79 1940     58 1890
                1926

RECORDS FOR 07-23

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      95 1983     69 1974     71 2015     50 1966
                1952        1938        1999
                1934                    1983
   KCLT     101 1987     73 1880     78 1991     56 2007
                1952
   KGSP     102 1952     74 1974     79 1934     59 1966
                                                    1947

RECORDS FOR 07-24

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      96 1983     68 1985     71 1934     52 1966
                                                    1895
   KCLT     100 1983     73 1938     78 2010     59 1947
                1952                    1883
   KGSP     101 1952     70 1985     79 2010     59 1904

&&

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

&&

SYNOPSIS...DEO
NEAR TERM...PM
SHORT TERM...Wimberley
LONG TERM...DEO
AVIATION...PM
CLIMATE...Wimberley
Hazardous weather outlook, Jul 20, 4:10 AM EST, 13 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
510 AM EDT WED JUL 20 2016

GAZ010-017-NCZ033-035-048>053-058-059-062>065-501>510-SCZ001>003-
210915-
RABUN-HABERSHAM-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-
510 AM EDT WED JUL 20 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
EVENING ACROSS THE MOUNTAINS AND UPPER SAVANNAH RIVER VALLEY. THE
MAIN THREATS WILL BE FREQUENT CLOUD-TO-GROUND LIGHTNING...LOCALLY
HEAVY RAINFALL...AND GUSTY WINDS. A COUPLE OF STORM MAY BRIEFLY
BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..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.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ036-037-056-057-068>072-082-SCZ007>009-013-014-210915-
IREDELL-DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-
CABARRUS-UNION-SPARTANBURG-CHEROKEE-YORK-CHESTER-
510 AM EDT WED JUL 20 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PIEDMONT NORTH CAROLINA AND
UPSTATE SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..FRIDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..SATURDAY...EXCESSIVE HEAT POSSIBLE. HEAT INDEX VALUES ARE
FORECAST TO RANGE FROM 100 TO 108 DEGREES ACROSS MUCH OF THE
PIEDMONT BOTH SATURDAY AND SUNDAY AFTERNOONS.
..SUNDAY...EXCESSIVE HEAT POSSIBLE. SUNDAY LOOKS LIKE THE HOTTEST
DAY OF THE WEEK...WITH MUCH OF THE INTERSTATE 85 CORRIDOR
POSSIBLY SEEING HEAT INDEX VALUES 105 DEGREES OR GREATER.
..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

GAZ018-026-028-029-SCZ004>006-010>012-019-210915-
STEPHENS-FRANKLIN-HART-ELBERT-GREATER OCONEE-GREATER PICKENS-
GREATER GREENVILLE-ANDERSON-ABBEVILLE-LAURENS-GREENWOOD-
510 AM EDT WED JUL 20 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA AND UPSTATE
SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
EVENING ACROSS THE MOUNTAINS AND UPPER SAVANNAH RIVER VALLEY. THE
MAIN THREATS WILL BE FREQUENT CLOUD-TO-GROUND LIGHTNING...LOCALLY
HEAVY RAINFALL...AND GUSTY WINDS. A COUPLE OF STORM MAY BRIEFLY
BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..FRIDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..SATURDAY...EXCESSIVE HEAT POSSIBLE. HEAT INDEX VALUES ARE
FORECAST TO RANGE FROM 100 TO 108 DEGREES ACROSS MUCH OF THE
PIEDMONT BOTH SATURDAY AND SUNDAY AFTERNOONS.
..SUNDAY...EXCESSIVE HEAT POSSIBLE. SUNDAY LOOKS LIKE THE HOTTEST
DAY OF THE WEEK...WITH MUCH OF THE INTERSTATE 85 CORRIDOR
POSSIBLY SEEING HEAT INDEX VALUES 105 DEGREES OR GREATER.
..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

ARK

In the hours before

Special weather statement, Jul 20, 4:07 PM EST, 1 hour 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
507 PM EDT WED JUL 20 2016

NCZ063-064-202130-
TRANSYLVANIA NC-SOUTHERN JACKSON NC-
507 PM EDT WED JUL 20 2016

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN JACKSON AND
SOUTHWESTERN TRANSYLVANIA COUNTIES UNTIL 530 PM EDT...

AT 506 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 16
MILES SOUTHWEST OF BREVARD...OR NEAR LAKE TOXAWAY...MOVING SOUTH AT
10 MPH.

LOCATIONS TO BE IMPACTED INCLUDE... LAKE TOXAWAY...GORGES STATE
PARK...CASHIERS...SAPPHIRE AND BAD CREEK.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE IN THESE
AREAS.

LAT...LON 3517 8305 3514 8289 3506 8288 3500 8311
      3501 8311 3502 8313 3503 8313
TIME...MOT...LOC 2106Z 012DEG 12KT 3512 8298

CDG
Special weather statement, Jul 20, 4:11 PM EST, 1 hour 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
511 PM EDT WED JUL 20 2016

SCZ002-202145-
PICKENS MOUNTAINS SC-
511 PM EDT WED JUL 20 2016

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
NORTHWESTERN PICKENS COUNTY UNTIL 545 PM EDT...

AT 511 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM WITH
INTENSE LIGHTNING 14 MILES SOUTHWEST OF BREVARD...OR 5 MILES EAST OF
GORGES STATE PARK...MOVING SOUTH AT 15 MPH.

LOCATIONS TO BE IMPACTED INCLUDE...
JOCASSEE GORGES...KEOWEE TOXAWAY STATE PARK...LAKE JOCASSEE...LAKE
KEOWEE...SUNSET...ROCKY BOTTOM...SASSAFRAS MOUNTAIN AND NINE TIMES.

IN ADDITION TO INTENSE LIGHTNING...WIND GUSTS UP TO 40 MPH 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.

&&

LAT...LON 3501 8293 3501 8291 3503 8292 3506 8289
      3508 8279 3492 8278 3493 8291 3495 8291
      3496 8292 3497 8292 3498 8294 3499 8294
TIME...MOT...LOC 2111Z 010DEG 11KT 3506 8285

CDG
Special weather statement, Jul 20, 4:35 PM EST, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
535 PM EDT WED JUL 20 2016

NCZ063-064-SCZ001-202215-
TRANSYLVANIA NC-SOUTHERN JACKSON NC-OCONEE MOUNTAINS SC-
535 PM EDT WED JUL 20 2016

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
SOUTHEASTERN JACKSON...SOUTHWESTERN TRANSYLVANIA AND NORTHERN OCONEE
COUNTIES UNTIL 615 PM EDT...

AT 534 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
WITH INTENSE LIGHTNING 20 MILES SOUTHWEST OF BREVARD...OR 4 MILES
SOUTHEAST OF CASHIERS...MOVING SOUTH AT 10 MPH.

LOCATIONS TO BE IMPACTED INCLUDE...
CASHIERS...LAKE JOCASSEE...SAPPHIRE AND BAD CREEK.

IN ADDITION TO INTENSE LIGHTNING...PEA SIZE HAIL AND WIND GUSTS UP TO
40 MPH 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.

&&

LAT...LON 3513 8307 3510 8295 3497 8298 3499 8310
      3500 8311 3501 8311 3502 8313 3504 8313
      3505 8314
TIME...MOT...LOC 2134Z 012DEG 6KT 3507 8303

CDG
Local storm report, Jul 20, 5:28 PM EST, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
628 PM EDT WED JUL 20 2016

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

0604 PM     TSTM WND DMG     1 N MOUNTAIN REST       34.88N 83.15W
07/20/2016                   OCONEE             SC   TRAINED SPOTTER

            TREE ON POWERLINES OFF TROY VALLEY RD.

&&

JPT
Special weather statement, Jul 20, 5:31 PM EST, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
631 PM EDT WED JUL 20 2016

NCZ065-202300-
HENDERSON NC-
631 PM EDT WED JUL 20 2016

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT
SOUTHEASTERN HENDERSON COUNTY UNTIL 700 PM EDT...

AT 630 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM WITH
INTENSE LIGHTNING NEAR HENDERSONVILLE. THIS STORM WAS NEARLY
STATIONARY.

LOCATIONS TO BE IMPACTED INCLUDE... HENDERSONVILLE...FLAT
ROCK...LAUREL PARK...VALLEY HILL...EAST FLAT ROCK... CRAB CREEK AND
TUXEDO.

IN ADDITION TO INTENSE LIGHTNING...WIND GUSTS UP TO 40 MPH 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.

&&

LAT...LON 3534 8243 3524 8236 3523 8236 3519 8253
      3532 8253
TIME...MOT...LOC 2230Z 343DEG 1KT 3530 8247

CDG
Special weather statement, Jul 20, 5:33 PM EST, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
633 PM EDT WED JUL 20 2016

GAZ010-017-202300-
RABUN GA-HABERSHAM GA-
633 PM EDT WED JUL 20 2016

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN HABERSHAM AND
NORTHWESTERN RABUN COUNTIES UNTIL 700 PM EDT...

AT 633 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8
MILES WEST OF CLAYTON...OR NEAR MOCCASIN CREEK STATE PARK...MOVING
SOUTH AT 5 MPH.

LOCATIONS TO BE IMPACTED INCLUDE... LAKE BURTON...MOCCASIN CREEK
STATE PARK...MOCCASIN CREEK STATE PARK AND SEED LAKE.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE IN THESE
AREAS.

LAT...LON 3482 8365 3484 8366 3488 8366 3490 8363
      3491 8363 3492 8360 3493 8360 3494 8350
      3480 8344 3478 8366 3479 8368 3480 8368
TIME...MOT...LOC 2233Z 355DEG 5KT 3487 8356

CDG

The radar

The Greer radar (KGSP), 90 km away, was scanning. The volume nearest the first event began at 22:45 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, McDowell

When
July 20, 5:46 PM EST
Where
McDowell County, 3.05 mi NNE of Fero to 3.94 mi NE of Fero
Measured
50 kt (58 mph) estimated gust
Reported by
Broadcast Media
Coordinates
35.661, -81.950

Media reported a few trees and power lines blown down east of Marion.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in North Carolina in 2016Every state in 2016This day in weather historyWarnings in North Carolina, July 2016

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 652891.