Alert archive / South Carolina / Special Weather Statements in 2018

Special Weather Statement, NWS Columbia, SC

July 25, 2018Lexington County, South Carolina

NWS Columbia, SC issued this special weather statement at Jul 25, 2018, 5:43 PM EDT for Lexington County, South Carolina. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 25, 2018, 5:43 PM EDT (21:43 UTC)
Expired: Jul 25, 2018, 6:15 PM EDT
In force: 32 min
Issued by: NWS Columbia, SC

County Lexington County, SC

The radar

The Columbia radar (KCAE), 27 km from the middle of the area, began a volume at 21:46 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.7 hours before the alert went out and 182 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: 861 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 785 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 25, 3:02 PM EDT, 2 hours 41 minutes earlier.

Area forecast discussion, Jul 25, 3:02 PM EDT, 2 hours 41 minutes before

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</head>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Jul 25, 2:14 AM EDT, 15 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
214 AM EDT Wed Jul 25 2018

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-260930-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
214 AM EDT Wed Jul 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 late this morning into the evening may contain heavy
rain leading to possible localized flooding. Damaging wind may also
occur with a few of the thunderstorms.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 25, 2:38 PM EDT, 3 hours 5 minutes before

Special Weather Statement
National Weather Service Columbia SC
238 PM EDT WED JUL 25 2018

SCZ028-037-251915-
Calhoun SC-Richland SC-
238 PM EDT WED JUL 25 2018

...Strong Thunderstorms Will Impact Portions of northwestern Calhoun
and central Richland Counties Until 315 PM EDT....

At 237 PM EDT...National Weather Service doppler radar indicated
strong thunderstorms along a line extending from Forest Acres to 8
miles east of Gaston, moving east at 10 mph.

  HAZARD...strong winds 45 to 55 mph and localized minor flooding.

  IMPACT...expect minor damage to tree limbs and blowing around of
           light, unsecured objects. Localized minor flooding of low
           lying and poor drainage areas is also possible.

Some locations in the path of these storms include...
Columbia, Cayce, Forest Acres, Dentsville, Woodfields, Arcadia Lakes,
Five Points, Woodfield and Fort Jackson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is occurring with these storms, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify. Monitor NOAA Weather Radio, local radio
and television stations for additional information and possible
warnings from the National Weather Service.

&&

This includes the following highways...
 Interstate 20 in South Carolina between mile markers 73 and 84.
 Interstate 26 between mile markers 124 and 127, and between mile
markers 131 and 133.
 Interstate 77 between mile markers 3 and 18.

LAT...LON 3372 8100 3376 8093 3378 8096 3378 8101
      3388 8102 3388 8101 3389 8102 3391 8101
      3391 8102 3393 8102 3395 8103 3403 8104
      3417 8085 3413 8079 3370 8074
TIME...MOT...LOC 1837Z 252DEG 7KT 3401 8098 3380 8096

JAQ

Special weather statement, Jul 25, 2:51 PM EDT, 2 hours 52 minutes before

Special Weather Statement
National Weather Service Columbia SC
251 PM EDT WED JUL 25 2018

SCZ037-251915-
Calhoun SC-
251 PM EDT WED JUL 25 2018

...Strong Thunderstorms Will Impact Portions of southeastern Calhoun
County Until 315 PM EDT....

At 251 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm near St. Matthews, or 9 miles northeast of
Brookdale, moving east at 15 mph.

  HAZARD...strong winds 45 to 55 mph and localized minor flooding.

  IMPACT...expect minor damage to tree limbs and blowing around of
           light, unsecured objects. Localized minor flooding of low
           lying and poor drainage areas is also possible.

Some locations in the path of this storm include...
St. Matthews and Cameron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is occurring with this storm, and may cause localized
flooding. Do not drive your vehicle through flooded roadways.

This storm may intensify. Monitor NOAA Weather Radio, local radio and
television stations for additional information and possible warnings
from the National Weather Service.

&&

LAT...LON 3356 8054 3356 8060 3355 8061 3354 8059
      3355 8073 3358 8078 3369 8083 3376 8065
      3374 8062 3374 8063 3373 8063 3369 8059
      3368 8056 3354 8051
TIME...MOT...LOC 1851Z 255DEG 12KT 3363 8073

JAQ

Special weather statement, Jul 25, 3:45 PM EDT, 1 hour 58 minutes before

Special Weather Statement
National Weather Service Columbia SC
345 PM EDT WED JUL 25 2018

SCZ022-029-031-252030-
Sumter SC-Kershaw SC-Lee SC-
345 PM EDT WED JUL 25 2018

...Strong Thunderstorms Will Impact Portions of northwestern
Sumter...southeastern Kershaw and northwestern Lee Counties Until 430
PM EDT....

At 344 PM EDT...National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Camden to near
Oakland to near Eastover, moving northeast at 25 mph.

  HAZARD...strong winds 45 to 55 mph and pea sized hail.

  IMPACT...expect minor damage to tree limbs and blowing around of
           light, unsecured objects. Minor hail damage to plants,
           trees and crops is possible. Damage to windshields is
           unlikely.

Some locations in the path of these storms include...
Sumter, Camden, Bishopville, Oakland, Bethune, Dalzell, Cherryvale,
Rembert, Stateburg and Wedgewood.

This includes Interstate 20 in South Carolina between mile markers 96
and 117.

LAT...LON 3396 8041 3385 8063 3389 8062 3391 8063
      3394 8063 3401 8058 3424 8063 3443 8032
      3439 8029 3436 8029 3432 8024 3423 8022
TIME...MOT...LOC 1944Z 232DEG 21KT 3421 8056 3405 8052 3394 8063

fwa

Special weather statement, Jul 25, 5:43 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Columbia SC
543 PM EDT WED JUL 25 2018

SCZ027-028-252215-
Lexington SC-Richland SC-
543 PM EDT WED JUL 25 2018

...Developing Thunderstorm Will Impact Portions of northwestern
Lexington and northwestern Richland Counties Until 615 PM EDT....

...Boaters on Lake Murray should be on the lookout for rapidly
changing conditions...

At 541 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm 9 miles west of Irmo, moving southeast at 20 mph.

  HAZARD...gusty winds 30 mph and pea sized hail.

  IMPACT...expect minor damage to tree limbs and blowing around of
           light, unsecured objects. Minor hail damage to plants,
           trees and crops is possible. Damage to windshields is
           unlikely.

Some locations in the path of this storm include...
Columbia, Lexington, West Columbia, Cayce, Irmo, Springdale, Oak
Grove, St. Andrews, Red Bank, South Congaree, Chapin, Seven Oaks and
Lake Murray Of Richland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters on Lake Murray should move to shore and seek shelter. Strong,
erratic wind gusts and lightning are possible. If you can hear
thunder, you are close enough to be struck by lightning.

This storm may intensify. Monitor NOAA Weather Radio, local radio and
television stations for additional information and possible warnings
from the National Weather Service.

&&

This includes the following highways...
 Interstate 126 between mile markers 0 and 1.
 Interstate 20 in South Carolina between mile markers 52 and 66.
 Interstate 26 between mile markers 89 and 110.

LAT...LON 3413 8102 3388 8117 3403 8149 3409 8146
      3408 8145 3408 8143 3407 8141 3407 8139
      3412 8143 3414 8143 3418 8140 3418 8137
      3420 8135
TIME...MOT...LOC 2141Z 292DEG 17KT 3410 8135

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 2:35 PM EDT	Areal Flood Advisory	CAE	Richland	53 min
Jul 25, 2:38 PM EDT	Special Weather Statement	CAE	Richland	37 min
Jul 25, 2:51 PM EDT	Special Weather Statement	CAE	Calhoun	24 min
Jul 25, 3:45 PM EDT	Special Weather Statement	CAE	Lee	45 min
Jul 25, 6:35 PM EDT	Special Weather Statement	CAE	Fairfield, Lancaster	25 min
Jul 25, 6:58 PM EDT	Special Weather Statement	CAE	Fairfield	47 min
Jul 25, 7:14 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Richland	46 min
Jul 25, 7:49 PM EDT	Special Weather Statement	CAE	Lexington	41 min
Jul 25, 7:57 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lee, Sumter	48 min
Jul 24, 8:13 PM EDT	Special Weather Statement	CAE	Lincoln	32 min

Nearby

Special Weather Statements in South Carolina, 2018 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.