Alert archive / South Carolina / Special Weather Statements in 2018

Special Weather Statement, NWS Charleston, SC

March 20, 2018Jasper County, South Carolina

NWS Charleston, SC issued this special weather statement at Mar 20, 2018, 12:18 AM EDT for Jasper County, South Carolina. It was in force for 27 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: Mar 20, 2018, 12:18 AM EDT (04:18 UTC)
Expired: Mar 20, 2018, 12:45 AM EDT
In force: 27 min
Issued by: NWS Charleston, SC

County Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 47 km from the middle of the area, began a volume at 04:21 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 00:00Z, 4.3 hours before the alert went out and 134 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: -156 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 234 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 Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Mar 19, 10:50 PM EDT, 1 hour 28 minutes earlier.

Area forecast discussion, Mar 19, 10:50 PM EDT, 1 hour 28 minutes before

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Hazardous weather outlook, Mar 19, 11:41 PM EDT, 37 minutes before

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In the hours before

Special weather statement, Mar 19, 8:35 PM EDT, 3 hours 43 minutes before

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Special weather statement, Mar 20, 12:18 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Charleston SC
1218 AM EDT TUE MAR 20 2018

GAZ101-118-SCZ047-048-051-200445-
Effingham-Inland Chatham-Inland Jasper-Coastal Jasper-Beaufort-
1218 AM EDT TUE MAR 20 2018

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF EFFINGHAM...
CHATHAM...BEAUFORT AND JASPER COUNTIES...

At 1218 AM EDT, National Weather Service doppler radar indicated a
strong thunderstorm near Meinhard, or 8 miles north of Pooler, moving
east at 40 mph.

  HAZARD...strong winds 45 to 55 mph and up to penny 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...
Savannah, Bluffton, Bellinger Hill Area, Jasper, Rincon, Port
Wentworth, Hardeeville and Marlow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.

&&

LAT...LON 3241 8086 3214 8087 3219 8141 3220 8142
      3221 8141 3221 8142 3229 8143
TIME...MOT...LOC 0418Z 261DEG 36KT 3223 8130

ECT

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 20, 2:50 AM EDT	Severe Thunderstorm Warning	CHS	Allendale, Hampton	55 min
Mar 20, 3:41 AM EDT	Gale Watch	CHS		12 hr
Mar 20, 3:41 AM EDT	Small Craft Advisory	CHS		31 hr
Mar 20, 3:42 AM EDT	Lake Wind Advisory	CHS	Berkeley	45 hr
Mar 20, 3:42 AM EDT	Severe Thunderstorm Warning	CHS	Allendale, Colleton, Hampton	63 min
Mar 20, 3:44 AM EDT	Tornado Warning	CHS	Allendale, Hampton	31 min
Mar 20, 4:15 AM EDT	Special Weather Statement	CHS	Jasper	30 min
Mar 20, 4:26 AM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton, Hampton, Jasper	64 min
Mar 20, 5:11 AM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	35 min
Mar 20, 5:15 AM EDT	Special Marine Warning	CHS		60 min
Mar 20, 5:21 AM EDT	Special Weather Statement	CHS	Hampton	24 min
Mar 20, 6:18 AM EDT	Special Marine Warning	CHS		117 min
Mar 20, 2:11 PM EDT	Special Marine Warning	CHS		64 min
Mar 20, 2:28 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	62 min
Mar 20, 2:35 PM EDT	Special Weather Statement	CHS	Charleston	25 min
Mar 20, 2:38 PM EDT	Special Weather Statement	CHS	Dorchester	37 min
Mar 20, 2:48 PM EDT	Special Marine Warning	CHS		87 min
Mar 20, 2:48 PM EDT	Special Weather Statement	CHS	Colleton	27 min
Mar 20, 2:52 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Hampton	53 min
Mar 20, 3:06 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Dorchester	54 min
Mar 20, 3:16 PM EDT	Special Marine Warning	CHS		119 min
Mar 20, 3:18 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton, Dorchester	57 min
Mar 20, 3:34 PM EDT	Special Marine Warning	CHS		116 min
Mar 20, 3:49 PM EDT	Gale Warning	CHS		35 hr
Mar 20, 3:49 PM EDT	Special Weather Statement	CHS	Berkeley	26 min
Mar 20, 4:02 PM EDT	Special Weather Statement	CHS	Charleston	28 min
Mar 20, 4:14 PM EDT	Special Weather Statement	CHS	Georgetown	31 min
Mar 20, 4:59 PM EDT	Special Marine Warning	CHS		61 min
Mar 20, 5:24 PM EDT	Special Weather Statement	CHS	Dorchester	36 min
Mar 20, 5:45 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	43 min
Mar 20, 6:06 PM EDT	Special Marine Warning	CHS		114 min
Mar 20, 7:16 PM EDT	Special Weather Statement	CHS	Charleston	29 min
Mar 19, 8:35 PM EDT	Special Weather Statement	CHS	McIntosh	25 min
Mar 20, 3:53 AM EDT	Special Weather Statement	CHS	Jenkins, Screven	37 min
Mar 20, 4:42 AM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Jenkins, Screven	48 min
Mar 20, 3:02 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, Long, McIntosh	58 min
Mar 20, 3:07 PM EDT	Tornado Warning	CHS	Liberty, McIntosh	38 min
Mar 20, 4:43 PM EDT	Special Weather Statement	CHS	McIntosh	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.