Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 102, NWS Columbia, SC

June 25, 20185 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jun 25, 2018, 8:05 PM EDT for 5 counties in South Carolina. It was in force for 40 min. 5 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 25, 2018, 8:05 PM EDT (00:05 UTC)
Expired: Jun 25, 2018, 8:45 PM EDT
In force: 40 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chesterfield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 59 km from the middle of the area, began a volume at 00:06 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 25, 8:10 PM EDT	TSTM WND DMG	1 E Irmo, SC	REPORTED SHADY LANE BLOCKED DUE TO A TREE. NEAR GAILLARD STREET AND KINLEY ROAD.
Jun 25, 8:10 PM EDT	TSTM WND DMG	7 E Peak, SC	FAIRFIELD COUNTY DISPATCH REPORTED TREES AND POWERLINES DOWN THROUGHOUT THE COUNTY.
Jun 25, 8:15 PM EDT	TSTM WND GST 47	3 Ssw Winnsboro Mills, SC	A WIND GUST OF 47 MPH AT THE FAIRFIELD COUNTY AIRPORT AT 815 PM.
Jun 25, 8:32 PM EDT	TSTM WND DMG	2 S Forest Acres, SC	REPORTED A TREE ON THE ROADWAY BLOCKING THE INTERSECTION OF BELTLINE BOULEVARD AND CROSS HILL ROAD.
Jun 25, 8:35 PM EDT	TSTM WND GST 47	2 Sse Columbia, SC	RCWINDS MESONET RECORDED A WIND GUST OF 47 MPH AT WILLIAMS BRICE STADIUM AT 835 PM.

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 3 storm reports to this severe thunderstorm warning; the first came 5 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 25, 1:02 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 0.1 hours before the alert went out and 180 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: 50 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 1777 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

225 
WUUS52 KCAE 260005
SVRCAE
SCC025-039-055-057-079-260045-
/O.NEW.KCAE.SV.W.0102.180626T0005Z-180626T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
805 PM EDT MON JUN 25 2018

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Eastern Fairfield County in central South Carolina...
  Lancaster County in central South Carolina...
  Western Chesterfield County in central South Carolina...
  Kershaw County in central South Carolina...
  Richland County in central South Carolina...

* Until 845 PM EDT.

* At 804 PM EDT, severe thunderstorms were located along a line
  extending from near Mineral Springs to 7 miles northeast of Irmo,
  moving southeast at 50 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Columbia, Irmo, Forest Acres, Lancaster, Camden, Winnsboro, St.
  Andrews, Dentsville, Woodfields, Pageland, Kershaw, Elgin, Arcadia
  Lakes, Eastover, Heath Springs, Lugoff, Irwin, Woodfield, Fort
  Jackson and Five Points.

This includes the following highways...
 Interstate 126 near mile marker 3.
 Interstate 20 in South Carolina between mile markers 65 and 105.
 Interstate 26 between mile markers 96 and 103.
 Interstate 77 between mile markers 3 and 50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3493 8078 3482 8079 3481 8007 3430 8038
      3428 8044 3418 8046 3409 8064 3404 8060
      3400 8065 3389 8062 3379 8069 3393 8102
      3400 8105 3409 8117 3410 8128 3455 8100
      3455 8087 3483 8090 3493 8086 3507 8090
TIME...MOT...LOC 0004Z 300DEG 43KT 3496 8063 3416 8109 

HAIL...0.75IN
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 25, 7:43 PM EDT, 22 minutes earlier.

Area forecast discussion, Jun 25, 7:43 PM EDT, 22 minutes before

Area Forecast Discussion
National Weather Service Columbia SC
743 PM EDT Mon Jun 25 2018

.SYNOPSIS...
A cold front will push into the forecast area tonight and
Tuesday bringing showers and thunderstorms. Tuesday should be
the coolest day in the past week or so due mainly to increased
cloud cover. A more climatological pattern unfolds for the
remainder of the period with increasing moisture and ridging
into the Southeast. This pattern supports scattered diurnal
thunderstorms and above normal temperatures.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
The main concern will be the possibility of severe thunderstorms
and localized flooding.

Mesoanalysis indicated weak to moderate instability across the
area with DCAPE values up to 1400 J/kg. The Storm Prediction
Center has the northern half of SC under a severe thunderstorm
watch until 10 pm. Large hail and damaging winds are the main
threats.

Widespread convection across the Pee Dee region will move off
the coast early this evening. Next wave of convection
approaching from the west will affect the area through around
Midnight. HRRR has widespread showers and thunderstorms east of
the forecast area by 07Z. There will still be a chance of
showers during the early morning hours with the cold front in
the area. Also, both the HRRR and RAP showed short wave energy
crossing the area...moving east of the Midlands around 08Z.
Expect overnight lows in the low to mid 70s.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/...
An upper trough will slowly move eastward from the Great Lakes into
New England during this time period.  Scattered to numerous showers
and thunderstorms are forecast for Tuesday through Wednesday ahead
of this trough, while a drying trend starts on Thursday as a front
pushes offshore.  Temperatures will be near normal Tuesday and
Wednesday and then above normal on Thursday.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
High pressure aloft builds over the Mid Atlantic States this
weekend.  This results in an onshore flow across the region which
will likely enhance the seabreeze front. Temperatures will be above
normal with the H5 heights.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
Numerous showers and thunderstorms will persist across the TAF
sites through 26/03z. Visbilities down to 2SM and gusts to 35
knots will be possible with the strongest storms. Expect
showers to persist until 26/09z.

Showers and thunderstorms will be possible after 26/19z on
Tuesday with an upper trough providing additional forcing to a
moist summer time airmass.

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.

&&

SYNOPSIS...99
NEAR TERM...99
SHORT TERM...99
LONG TERM...99
AVIATION...99

Hazardous weather outlook, Jun 25, 2:17 AM EDT, 17 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
217 AM EDT Mon Jun 25 2018

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-260630-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
217 AM EDT Mon Jun 25 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.

Thunderstorms with damaging wind and hail will be possible this
afternoon and tonight. The threat will be greatest this evening.
There will also be a possibility of very heavy rain leading to
localized flooding this afternoon and especially tonight.

It will be hot today with heat index values peaking near 105.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required this afternoon and tonight.

In the hours before

Local storm report, Jun 25, 7:46 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
746 PM EDT MON JUN 25 2018

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

0737 PM     TSTM WND DMG     6 WNW EDGEFIELD         33.83N 82.03W
06/25/2018                   EDGEFIELD          SC   LAW ENFORCEMENT

            SC HIGHWAY PATROL REPORTED TREES DOWN ON
            WALKER ROAD AT SC 283.

&&

WRS

Local storm report, Jun 25, 7:48 PM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
748 PM EDT MON JUN 25 2018

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

0704 PM     TSTM WND DMG     4 ESE WILLINGTON        33.95N 82.38W
06/25/2018                   MCCORMICK          SC   LAW ENFORCEMENT

            SHERIFF DISPATCH REPORTED MULTIPLE TREES
            DOWN ACROSS THE NORTHERN PORTION OF THE
            COUNTY.

&&

LCV

Local storm report, Jun 25, 7:50 PM EDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
750 PM EDT MON JUN 25 2018

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

0730 PM     TSTM WND DMG     5 NE MCCORMICK          33.96N 82.25W
06/25/2018                   MCCORMICK          SC   LAW ENFORCEMENT

            SHERIFF DISPATCH REPORTED MULTIPLE TREES
            DOWN ACROSS THE CENTRAL AND EASTERN PORTION
            OF THE COUNTY.

&&

LCV

Local storm report, Jun 25, 7:53 PM EDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
753 PM EDT MON JUN 25 2018

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

0748 PM     TSTM WND DMG     5 N EDGEFIELD           33.86N 81.94W
06/25/2018                   EDGEFIELD          SC   LAW ENFORCEMENT

            SHERIFF DISPATCH REPORTED MULTIPLE TREES
            DOWN ACROSS THE COUNTY.

&&

LCV

Local storm report, Jun 25, 7:56 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
756 PM EDT MON JUN 25 2018

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

0730 PM     TSTM WND GST     11 NNW EVANS            33.66N 82.20W
06/25/2018  M59 MPH          COLUMBIA           GA   OFFICIAL NWS OBS

            WIND EQUIPMENT AT LAKE THURMOND DAM REPORTED
            A WIND GUST TO 59 MPH AT 730 PM.

&&

LCV

Local storm report, Jun 25, 7:59 PM EDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
759 PM EDT MON JUN 25 2018

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

0749 PM     HAIL             GROVETOWN               33.45N 82.21W
06/25/2018  E0.75 INCH       COLUMBIA           GA   TRAINED SPOTTER

            SPOTTER REPORTED PEA TO DIME SIZE HAIL ALONG
            WITH WIND GUSTS FROM 40 TO 50 MPH IN THE
            TOWN OF GROVETOWN.

&&

LCV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:06 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington	39 min
Jun 25, 8:14 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Orangeburg, Sumter	61 min
Jun 25, 8:28 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	62 min
Jun 25, 8:43 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Kershaw, Lee, Richland, Sumter	47 min
Jun 25, 8:45 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	60 min
Jun 25, 8:55 PM EDT	Areal Flood Advisory	CAE	Calhoun, Lexington	65 min
Jun 25, 9:14 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Calhoun, Clarendon, Orangeburg	46 min
Jun 26, 5:38 PM EDT	Special Weather Statement	CAE	Lancaster, Newberry	52 min
Jun 26, 6:12 PM EDT	Special Weather Statement	CAE	McCormick	63 min
Jun 26, 6:18 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	42 min
Jun 26, 6:24 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lexington, Newberry, Richland	36 min
Jun 26, 6:40 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Newberry, Saluda	35 min
Jun 26, 6:56 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	64 min
Jun 26, 7:01 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Richland	44 min
Jun 26, 7:11 PM EDT	Special Weather Statement	CAE	Kershaw, Lancaster	64 min
Jun 26, 7:25 PM EDT	Areal Flood Advisory	CAE	Kershaw, Lancaster	2 hr
Jun 26, 7:29 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington, Saluda	46 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.