Alert archive / South Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Charleston, SC

July 23, 2017Berkeley County, South Carolina

NWS Charleston, SC issued this special weather statement at Jul 23, 2017, 4:49 PM EDT for Berkeley County, South Carolina. It was in force for 41 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 23, 2017, 4:49 PM EDT (20:49 UTC)
Expired: Jul 23, 2017, 5:30 PM EDT
In force: 41 min
Issued by: NWS Charleston, SC

County Berkeley County, SC

The radar

The Columbia radar (KCAE), 121 km from the middle of the area, began a volume at 20:51 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, 8.8 hours before the alert went out and 59 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: 1307 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 933 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -40 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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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:41 PM EDT	Special Weather Statement	CHS	Hampton	49 min
Jul 23, 5:17 PM EDT	Special Weather Statement	CHS	Dorchester	43 min
Jul 23, 5:24 PM EDT	Small Craft Advisory	CHS		10 hr
Jul 23, 4:25 PM EDT	Areal Flood Advisory	CHS	Bryan, Evans, Liberty, Tattnall	2 hr

Nearby

Special Weather Statements in South Carolina, 2017 Every special weather statement in 2017

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.