Alert archive / North Carolina / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 320, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 31, 2018, 6:30 PM EDT for Gaston County, Lincoln County, North Carolina. It was in force for 20 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
- Aug 31, 2018, 6:30 PM EDT (22:30 UTC)
- Expired
- Aug 31, 2018, 6:50 PM EDT
- In force
- 20 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Gaston County, NC, Lincoln County, NC
The radar
The Greer radar (KGSP), 108 km from the middle of the area, began a volume at 22:30 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 6:40 PM EDT | TSTM WND DMG | 1 E High Shoals, NC | TREES DOWN NEAR PHILADELPHIA CHURCH AND HARDIN RDS. |
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 10 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 nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.5 hours before the alert went out and 141 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.
- Mixed-layer CAPE
- 482 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 865 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
315
WUUS52 KGSP 312230
SVRGSP
NCC071-109-312315-
/O.NEW.KGSP.SV.W.0320.180831T2230Z-180831T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
630 PM EDT FRI AUG 31 2018
The National Weather Service in Greenville-Spartanburg has issued a
* Severe Thunderstorm Warning for...
South central Lincoln County in the Piedmont of North Carolina...
North central Gaston County in the Piedmont of North Carolina...
* Until 715 PM EDT.
* At 630 PM EDT, a severe thunderstorm was located 7 miles south of
Lincolnton, or near High Shoals, moving north at 10 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...
Stanley, High Shoals, Iron Station, Crouse and Dallas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Brief damaging winds will blow down trees and power lines over small
areas. A brief period of large hail is also possible. 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 3534 8107 3530 8126 3537 8132 3546 8134
3545 8113
TIME...MOT...LOC 2230Z 165DEG 8KT 3537 8122
HAIL...1.00IN
WIND...60MPH
$$
MOORE1 follow-up statement
183
WWUS52 KGSP 312250
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
650 PM EDT FRI AUG 31 2018
NCC071-109-312300-
/O.CAN.KGSP.SV.W.0320.000000T0000Z-180831T2315Z/
Lincoln NC-Gaston NC-
650 PM EDT FRI AUG 31 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LINCOLN AND
NORTH CENTRAL GASTON COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
LAT...LON 3534 8107 3530 8126 3537 8132 3546 8134
3545 8113
TIME...MOT...LOC 2248Z 165DEG 8KT 3541 8123
$$
MOOREWhat 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 Aug 31, 5:22 PM EDT, 1 hour 8 minutes earlier.
Area forecast discussion, Aug 31, 5:22 PM EDT, 1 hour 8 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
522 PM EDT Fri Aug 31 2018
.SYNOPSIS...
A strong upper-level ridge will dominate the eastern United States
through the entire period, resulting in above-normal temperatures
and reduced precip chances outside of the mountains.
&&
.NEAR TERM /THROUGH SATURDAY/...
As of 500 PM: The best convective coverage continues in
the higher instability region near the I-77 corridor late this
afternoon, with sbCAPE values running 2000 to 3000 J/kg
coincident with elevated DCAPE values. A secondary maximum of
coverage will continue over the NC mountains in weak terrain
forcing. Convection is currently isolated elsewhere. Expect the
convection to fill in slightly across the rest of the area on
outflows, but remain low end scattered at best. With light shear
in place, don't expect any organized severe storms, but
isolated damaging wind gusts are quite possible. An isolated
flooding threat continues as well with high PW values and slowly
moving storms. The southerly storm motion is also a concern as
storms may move across the same areas, especially in the higher
terrain. The convection should diminish this evening with the
loss of heating.
The weakness in the upper pattern is erased Saturday as upper
ridging builds west over the Southeast CONUS. This means less short
wave energy rotating over the area. This should also bring an end to
the steeper lapse rates we've seen the past couple of days. That
said, instability and high moisture levels continue keeping diurnal
convection in the forecast. Coverage should be similar to the past
couple of days with highest chance over the mountains and lowest
chance over NE GA and the western Upstate.
Lows tonight and highs Saturday will be a few degrees above normal.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
As of 245 PM Fri: Since the previous issuance, there has been very
little change to the overall forecasted pattern through the end
of the extended period Saturday morning during what is thankfully
a benign pattern for this time of year. The upper-level ridge,
which has been largely absent across the eastern ConUS all summer,
will retrograde slightly west and and amplify Sunday into Monday
Its presence should induce subsidence warming as indicated by
forecast profiles (700-800mb cap) which should provide enough
inhibition to limit most diurnal convective coverage to the
climatologically favorable ridge tops. With negligible steering
flow and PWs in the 75th-90th percentile for this time of year,
any pulse convection will be capable of producing heavy rainfall.
Strong downburst winds will also be possible as the convection
collapses. Max temperatures will be generally 2-5 degrees above
normal with min temps 4-7 degrees above normal. Dewpoints outside
of the mountains will stagnate around 70 with very little mixing
to reduce humidity values during the afternoon.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
As of 245 PM Fri: As mentioned above, the overall pattern will
persist through the end of the extended on Saturday morning
with the heat ridge peaking mid-week over the Mid-Atlantic.
Slight convective chances will persist, with the highest
chances remaining over the ridge tops as subsidence should limit
convection over the Pidemont. Little change to total moisture
content through the period will mean the threat for isolated
heavy rainfall will also persist given the slow-moving activity.
Temperatures will remain above-normal through mid-week; however,
flow will become more northeasterly around the southern extent of
the high pressure heading into late week which may advect slightly
cooler air into the region as the upper-ridge starts to break
down somewhat. Any sensible weather changes will be very modest
with max temperatures returning to near normal, low temperatures
remaining above normal, and PoPs largely unchanged.
&&
.AVIATION /22Z FRIDAY THROUGH WEDNESDAY/...
At KCLT and elsewhere: Thunderstorms with gusty winds will be
persistent around KCLT through at least 23Z and the TAF has been
updated accordingly for G35kt during this period. Coverage will be
fairly spotty at the other TAF sites, with KAVL and KHKY most at
risk. The convection should dissipate during the later evening
hours. Looks like another favorable night for mountain valley fog.
MVFR fog is possible at KHKY/KAND toward morning. Once the fog burns
off, cumulus develops for Saturday afternoon. Light S to SW wind
this afternoon becomes light and variable this evening. Light SW
wind for Saturday.
Outlook: Scattered diurnal showers and thunderstorms are expected
each afternoon Sunday through Tuesday. Areas of fog and low stratus
can also be expected each morning, primarily in the mtn valleys.
Confidence Table...
21-03z 03-09Z 09-15Z 15-18Z
KCLT High 100% High 100% High 91% High 100%
KGSP High 100% High 100% High 91% High 100%
KAVL High 100% High 83% Low 49% High 100%
KHKY High 100% High 100% High 83% 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
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.
&&
SYNOPSIS...JMP
NEAR TERM...HG/RWH
SHORT TERM...JMP
LONG TERM...JMP
AVIATION...HG/RWHHazardous weather outlook, Aug 31, 4:03 AM EDT, 14 hours 27 minutes before
Hazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 403 AM EDT Fri Aug 31 2018 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-010815- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander- Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba- Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania- Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union- 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-Spartanburg-Cherokee-York- Anderson-Abbeville-Laurens-Chester-Greenwood- 403 AM EDT Fri Aug 31 2018 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, western North Carolina and upstate South Carolina. .DAY ONE...Today and tonight. Scattered thunderstorms are in the forecast today and tonight. The storms will be most widespread during the afternoon and early evening. Cloud-to-ground lightning is possible with any of these thunderstorms, along with torrential rainfall. A few of the storms could also produce severe weather, in the form of damaging wind. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None. Wimberley
In the hours before
Special weather statement, Aug 31, 5:11 PM EDT, 1 hour 19 minutes before
Special Weather Statement National Weather Service Greenville-Spartanburg SC 511 PM EDT FRI AUG 31 2018 NCZ057-312145- Rowan NC- 511 PM EDT FRI AUG 31 2018 ...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL ROWAN COUNTY UNTIL 545 PM EDT... At 511 PM EDT, Doppler radar was tracking a strong thunderstorm 5 miles south of Salisbury, or near Faith, moving north at 10 mph. Locations to be impacted include... Salisbury, China Grove, Granite Quarry, Rockwell, Faith, Spencer and High Rock Lake. Wind gusts up to 45 mph, pea size hail and very heavy rainfall rates up to 2 inches per hour will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3551 8039 3553 8059 3570 8059 3568 8033 TIME...MOT...LOC 2111Z 185DEG 8KT 3559 8049 MOORE
Local storm report, Aug 31, 5:46 PM EDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
546 PM EDT FRI AUG 31 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0506 PM TSTM WND DMG FORT MILL 35.01N 80.94W
08/31/2018 YORK SC 911 CALL CENTER
911 CALL CENTER REPORTED TREES AND LINES DOWN AROUND
GREATER FORT MILL.
&&Special weather statement, Aug 31, 5:49 PM EDT, 41 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
549 PM EDT FRI AUG 31 2018
NCZ037-057-312215-
Rowan NC-Davie NC-
549 PM EDT FRI AUG 31 2018
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL DAVIE AND CENTRAL
ROWAN COUNTIES UNTIL 615 PM EDT...
At 549 PM EDT, Doppler radar was tracking a strong thunderstorm near
Salisbury, moving north at 5 mph.
Locations to be impacted include...
Salisbury, Spencer and Cooleemee.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour 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 3563 8052 3581 8058 3582 8047 3580 8047
3580 8048 3579 8048 3577 8045 3575 8046
3574 8046 3572 8042 3573 8039 3564 8039
TIME...MOT...LOC 2149Z 177DEG 6KT 3569 8048
MOORESpecial weather statement, Aug 31, 5:56 PM EDT, 34 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
556 PM EDT FRI AUG 31 2018
NCZ036-056-069-312230-
Iredell NC-Lincoln NC-Catawba NC-
556 PM EDT FRI AUG 31 2018
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CATAWBA...EASTERN
LINCOLN AND SOUTH CENTRAL IREDELL COUNTIES UNTIL 630 PM EDT...
At 556 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Huntersville, or near Westport, moving north at 10
mph.
Locations to be impacted include...
Westport, Lake Norman, Denver, Lowesville, Sherrills Ford, Terrell
and Doolie.
Wind gusts up to 40 mph and pea size hail will be possible in these
areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
Lake Norman is in the path of this storm. Cloud to ground lightning
and gusty winds will create dangerous boating conditions.
Move to shore immediately.
&&
LAT...LON 3551 8092 3549 8094 3547 8095 3546 8094
3545 8094 3543 8096 3540 8096 3541 8108
3565 8106 3564 8087
TIME...MOT...LOC 2156Z 184DEG 8KT 3551 8100
MOORESpecial weather statement, Aug 31, 6:04 PM EDT, 26 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
604 PM EDT FRI AUG 31 2018
SCZ009-312230-
York SC-
604 PM EDT FRI AUG 31 2018
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL YORK COUNTY UNTIL 630 PM
EDT...
At 604 PM EDT, Doppler radar was tracking a strong thunderstorm near
York, moving north at 5 mph.
Locations to be impacted include...
York, Mcconnells and Newport.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour 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 3489 8112 3487 8124 3492 8132 3506 8133
3506 8110
TIME...MOT...LOC 2204Z 187DEG 5KT 3498 8122
MOORESpecial weather statement, Aug 31, 6:25 PM EDT, 5 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
625 PM EDT FRI AUG 31 2018
NCZ056-312300-
Catawba NC-
625 PM EDT FRI AUG 31 2018
...STRONG THUNDERSTORMS WILL IMPACT CATAWBA COUNTY UNTIL 700 PM
EDT...
At 624 PM EDT, Doppler radar was tracking a strong thunderstorm 4
miles south of Hickory, or near Mountain View, moving north at 10
mph. Another strong storm was located northeast of Maiden, also
moving north at 10 mph.
Locations to be impacted include...
Hickory, Newton, St. Stephens, Conover, Longview, Maiden, Claremont,
Catawba, Mountain View and Lake Hickory.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3582 8118 3576 8109 3573 8107 3571 8106
3555 8107 3556 8121 3561 8136 3572 8140
3576 8137 3577 8135 3578 8136 3580 8134
3580 8130 3581 8125
TIME...MOT...LOC 2224Z 172DEG 7KT 3568 8133
MOOREThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 9:46 PM EDT | Special Weather Statement | GSP | Rowan | 29 min |
| Aug 30, 9:48 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Rowan | 42 min |
| Aug 30, 9:54 PM EDT | Special Weather Statement | GSP | Alexander | 36 min |
| Aug 30, 10:30 PM EDT | Severe Thunderstorm Warning | GSP | Davie, Rowan | 45 min |
| Aug 30, 11:12 PM EDT | Special Weather Statement | GSP | Mecklenburg | 33 min |
| Aug 30, 11:41 PM EDT | Special Weather Statement | GSP | Catawba | 34 min |
| Aug 30, 11:57 PM EDT | Special Weather Statement | GSP | Mecklenburg | 33 min |
| Aug 31, 12:15 AM EDT | Special Weather Statement | GSP | Catawba | 30 min |
| Aug 31, 12:58 AM EDT | Special Weather Statement | GSP | Iredell | 32 min |
| Aug 31, 1:28 AM EDT | Special Weather Statement | GSP | Davie | 32 min |
| Aug 31, 3:21 PM EDT | Special Weather Statement | GSP | Union | 24 min |
| Aug 31, 3:47 PM EDT | Special Weather Statement | GSP | Avery | 28 min |
| Aug 31, 4:44 PM EDT | Special Weather Statement | GSP | Mecklenburg | 31 min |
| Aug 31, 5:02 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg | 28 min |
| Aug 31, 5:06 PM EDT | Special Weather Statement | GSP | Burke | 24 min |
| Aug 31, 5:11 PM EDT | Special Weather Statement | GSP | Rowan | 34 min |
| Aug 31, 5:18 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg | 27 min |
| Aug 31, 5:46 PM EDT | Severe Thunderstorm Warning | GSP | Gaston | 44 min |
| Aug 31, 5:49 PM EDT | Special Weather Statement | GSP | Rowan | 26 min |
| Aug 31, 5:56 PM EDT | Special Weather Statement | GSP | Lincoln | 34 min |
| Aug 31, 6:10 PM EDT | Severe Thunderstorm Warning | GSP | Lincoln | 35 min |
| Aug 31, 6:20 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland | 21 min |
| Aug 31, 6:25 PM EDT | Special Weather Statement | GSP | Catawba | 35 min |
| Aug 31, 6:35 PM EDT | Special Weather Statement | GSP | Burke | 25 min |
| Aug 31, 6:43 PM EDT | Special Weather Statement | GSP | Cleveland | 32 min |
| Aug 31, 6:46 PM EDT | Severe Thunderstorm Warning | GSP | Catawba | 44 min |
| Aug 31, 7:22 PM EDT | Severe Thunderstorm Warning | GSP | Catawba, Lincoln | 23 min |
| Aug 31, 7:29 PM EDT | Special Weather Statement | GSP | Alexander | 31 min |
| Aug 31, 7:49 PM EDT | Special Weather Statement | GSP | Alexander | 26 min |
Nearby
Severe 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.