Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 119, NWS Columbia, SC

June 27, 2018Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jun 27, 2018, 5:35 PM EDT for Lancaster County, South Carolina. It was in force for 55 min. 2 reports 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: Jun 27, 2018, 5:35 PM EDT (21:35 UTC)
Expired: Jun 27, 2018, 6:30 PM EDT
In force: 55 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 89 km from the middle of the area, began a volume at 21:36 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
Jun 27, 6:30 PM EDT	TSTM WND DMG	2 S Irwin, SC	REPORTED TREES DOWN NEAR GREAT FALLS HIGHWAY AND DOUGLAS HEIGHTS LANE.
Jun 27, 6:30 PM EDT	TSTM WND DMG	3 Ssw Irwin, SC	TREES DOWN NEAR THE INTERSECTION OF HIGHWAY 200 AND BETHEL ROAD.

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 2 storm reports to this severe thunderstorm warning; the first came 55 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.

Issued	Product	Office	Lasted
Jun 27, 3:36 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.6 hours before the alert went out and 174 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 17 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

465 
WUUS52 KCAE 272135
SVRCAE
SCC057-272230-
/O.NEW.KCAE.SV.W.0119.180627T2135Z-180627T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
535 PM EDT WED JUN 27 2018

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lancaster County in central South Carolina...

* Until 630 PM EDT.

* At 534 PM EDT, severe thunderstorms were located along a line
  extending from near Rock Hill to Chester, moving east at 20 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Lancaster, Elgin, Irwin and Lancaster Mill. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection seek shelter inside a sturdy building and stay
away from windows.

Report any hail, damaging winds or flooding directly to the Columbia
National Weather Service at 803 234 4115 when it is safe to do so.
You can also send reports by Facebook or Twitter to NWSColumbia or by
e-mail at NWS.Columbia@noaa.gov.

&&

LAT...LON 3489 8078 3482 8079 3482 8057 3448 8084
      3446 8088 3449 8090 3450 8088 3452 8087
      3465 8089 3470 8086 3474 8088 3479 8087
      3483 8090 3484 8087 3490 8088 3492 8087
TIME...MOT...LOC 2134Z 285DEG 19KT 3495 8107 3472 8122 

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

fwa

2 follow-up statements

374 
WWUS52 KCAE 272158
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
558 PM EDT WED JUN 27 2018

SCC057-272230-
/O.CON.KCAE.SV.W.0119.000000T0000Z-180627T2230Z/
Lancaster SC-
558 PM EDT WED JUN 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHWESTERN LANCASTER COUNTY...

At 557 PM EDT, severe thunderstorms were located along a line
extending from near Lesslie to near Blackstock, moving east at 20
mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lancaster, Elgin, Irwin and Lancaster Mill. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection seek shelter inside a sturdy building and stay
away from windows.

&&

LAT...LON 3489 8078 3482 8079 3482 8057 3448 8084
      3446 8088 3449 8090 3450 8088 3452 8087
      3465 8089 3470 8086 3474 8088 3479 8087
      3483 8090 3484 8087 3490 8088 3492 8087
TIME...MOT...LOC 2157Z 290DEG 18KT 3491 8091 3460 8119 

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

fwa

284 
WWUS52 KCAE 272214
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
614 PM EDT WED JUN 27 2018

SCC057-272230-
/O.CON.KCAE.SV.W.0119.000000T0000Z-180627T2230Z/
Lancaster SC-
614 PM EDT WED JUN 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHWESTERN LANCASTER COUNTY...

At 614 PM EDT, severe thunderstorms were located along a line
extending from near Waxhaw to near Blackstock, moving east at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lancaster, Elgin, Irwin and Lancaster Mill. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection seek shelter inside a sturdy building and stay
away from windows.

Report any hail, damaging winds or flooding directly to the Columbia
National Weather Service at 803 234 4115 when it is safe to do so.
You can also send reports by Facebook or Twitter to NWSColumbia or by
e-mail at NWS.Columbia@noaa.gov.

&&

LAT...LON 3489 8078 3482 8079 3482 8057 3448 8084
      3446 8088 3449 8090 3450 8088 3452 8087
      3465 8089 3470 8086 3474 8088 3479 8087
      3483 8090 3484 8087 3490 8088 3492 8087
TIME...MOT...LOC 2214Z 285DEG 19KT 3489 8081 3458 8109 

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

fwa

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 Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 5:02 PM EDT, 33 minutes earlier.

Area forecast discussion, Jun 27, 5:02 PM EDT, 33 minutes before

Area Forecast Discussion
National Weather Service Columbia SC
502 PM EDT Wed Jun 27 2018

.SYNOPSIS...
Expect scattered afternoon thunderstorms followed by a line of
thunderstorms moving through the region this evening. There
will be lingering surface troughing during the rest of the week.
Hotter conditions will occur with diminished cloudiness and
upper ridging over the weekend.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Severe thunderstorm watch until 900 pm for northwest portion of
CWA. Severe thunderstorms currently in the Upstate at 21z in
area of moderately high ML CAPE 2500-3000 J/kg. There is a mid
level dry air intrusion over north Ga into SC. There is concern
this area of dry air will spread southeast toward the CSRA/west
Midlands ahead of short wave trough and result in an increase of
DCAPE above 1000 J/kg. The high resolution models along with
current meso-analysis suggest a threat for severe thunderstorms
especially across the Piedmont/north Midlands and CSRA this
evening with damaging wind gusts main threat associated with
strong instability and high DCAPE.

Activity will begin to diminish towards midnight, with only
isolated showers expected at that point. Clouds have kept
afternoon temperatures in check, and most sites will top out
around 90 degrees. Overnight lows in the middle 70s.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY/...
500mb ridging moves east from the south central plains to the
Ohio River Valley through the Friday. Early in the period
a surface trough lingers over the area providing best chance
for diurnal convection on Thursday afternoon/evening. LI indices
around -6 to -8 Thursday afternoon with the weak cap breaking
after 15z. SPC has assigned general thunder for the area but isolated
high wind and hail still possible in the afternoon/early
evening. Less chance for convection on Friday as ridge moves
closer. Guidance consensus for temperatures look reasonable with
heat index values peaking 100 to 105.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Models agree taking upper ridge across the eastern US this
weekend and building second ridge across central plains by late
in the period. Thermal trough between ridges will provide weak
forcing for mainly isolated to scattered diurnal convection
through the extended period. Slight chance to chance pops seems
reasonable with the GFS and ECMWF MOS suggesting above normal
temperatures.

&&

.AVIATION /21Z WEDNESDAY THROUGH MONDAY/...
VFR in the near term. Main concern is scattered strong to severe
thunderstorms to our N and NW drifting to the SE, which may
affect our TAF sites late today/this evening. Strong gusty
winds expected, and possibly hail, with the stronger storms.
For now, will indicate VCTS after 23Z, and upgrade mention when
confidence of occurrence and timing warrants.

Storms should be east of the TAF sites by 06Z tonight with
another round of low ceilings or visibility restrictions
possible overnight.

EXTENDED AVIATION OUTLOOK...Restrictions possible each day in
early morning fog plus mainly afternoon and evening thunderstorms.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.

&&

Hazardous weather outlook, Jun 27, 4:14 AM EDT, 13 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
414 AM EDT Wed Jun 27 2018

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-280815-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
414 AM EDT Wed Jun 27 2018

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...Today and Tonight.

Scattered afternoon thunderstorms are expected with another line of
thunderstorms moving into the western FA late this afternoon and
evening. Both will support threats of damaging winds and hail.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A few storms on Thursday afternoon could contain damaging wind and
hail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 27, 1:35 PM EDT, 4 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
135 PM EDT WED JUN 27 2018

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

0628 PM     TSTM WND DMG     MOUNT CARMEL            34.01N 82.51W
06/26/2018                   MCCORMICK          SC   DEPT OF HIGHWAYS

            HIGHWAY DEPARTMENT REPORTED SEVERAL TREES
            DOWN IN THE MT. CARMEL COMMUNITY.

&&

LCV

Local storm report, Jun 27, 1:58 PM EDT, 3 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
158 PM EDT WED JUN 27 2018

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

0750 PM     TSTM WND GST     11 NNW EVANS            33.66N 82.20W
06/26/2018  M41 MPH          COLUMBIA           GA   OFFICIAL NWS OBS

            NWS EQUIPMENT AT THE LAKE THURMOND DAM
            RECORDED A WIND GUST OF 41 MPH AT 750 PM.

&&

LCV

Local storm report, Jun 27, 2:14 PM EDT, 3 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
214 PM EDT WED JUN 27 2018

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

0837 PM     TSTM WND DMG     5 ENE THOMSON           33.48N 82.42W
06/26/2018                   MCDUFFIE           GA   DEPT OF HIGHWAYS

            HIGHWAY DEPARTMENT REPORTED TREES DOWN ALONG
            HOWARD ROAD AND WHITE OAK ROAD.

&&

LCV

Local storm report, Jun 27, 2:21 PM EDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
221 PM EDT WED JUN 27 2018

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

0837 PM     TSTM WND DMG     5 ENE THOMSON           33.48N 82.42W
06/26/2018                   MCDUFFIE           GA   DEPT OF HIGHWAYS

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 5
            ENE THOMSON. HIGHWAY DEPARTMENT REPORTED
            TREES DOWN ALONG HOWARD ROAD AND WHITE OAK
            ROAD.

&&

LCV

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 26, 8:03 PM EDT	Special Weather Statement	CAE	Edgefield	57 min
Jun 26, 8:08 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick, Saluda	67 min
Jun 26, 8:16 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	59 min
Jun 26, 9:22 PM EDT	Special Weather Statement	CAE	Aiken, Barnwell	53 min
Jun 26, 10:07 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	68 min
Jun 27, 5:37 PM EDT	Special Weather Statement	CAE	Newberry	53 min
Jun 27, 6:28 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	32 min
Jun 27, 6:42 PM EDT	Special Weather Statement	CAE	Lee, Sumter	48 min
Jun 27, 6:55 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	50 min
Jun 27, 7:29 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Richland, Sumter	46 min
Jun 27, 7:58 PM EDT	Special Weather Statement	CAE	Calhoun, Clarendon, Orangeburg	47 min
Jun 27, 7:59 PM EDT	Special Weather Statement	CAE	Aiken, Bamberg, Barnwell	61 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2018 Every 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.