Alert archive / South Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Charleston, SC

May 11, 2011Charleston County, South Carolina

NWS Charleston, SC issued this special weather statement at May 11, 2011, 12:03 AM EDT for Charleston County, South Carolina. It was in force for 42 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: May 11, 2011, 12:03 AM EDT (04:03 UTC)
Expired: May 11, 2011, 12:45 AM EDT
In force: 42 min
Issued by: NWS Charleston, SC

County Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 143 km from the middle of the area, began a volume at 04:05 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, 4.1 hours before the alert went out and 42 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: 2852 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 899 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 14.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 May 10, 11:37 PM EDT, 26 minutes earlier.

Area forecast discussion, May 10, 11:37 PM EDT, 26 minutes before

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Hazardous weather outlook, May 10, 11:14 PM EDT, 49 minutes before

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In the hours before

Local storm report, May 10, 10:26 PM EDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1026 PM EDT TUE MAY 10 2011

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

0952 PM     HAIL             4 ENE AWENDAW           33.06N  79.55W
05/10/2011  M1.75 INCH       CHARLESTON         SC   LAW ENFORCEMENT

            GOLF BALL SIZE HAIL. TIME ESTIMATED VIA RADAR.

&&

EVENT NUMBER CHS1100376

JRL

Local storm report, May 10, 10:50 PM EDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1050 PM EDT TUE MAY 10 2011

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

1043 PM     HAIL             2 ENE ISLE OF PALMS     32.80N  79.76W
05/10/2011  M1.75 INCH       CHARLESTON         SC   FIRE DEPT/RESCUE

            ISLE OF PALMS FIRE DEPT NUMBER 1 RECEIVING GOLF BALL
            SIZE HAIL.

&&

EVENT NUMBER CHS1100377

JRL

Local storm report, May 10, 10:53 PM EDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1053 PM EDT TUE MAY 10 2011

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

1041 PM     HAIL             3 SSW CAPERS INLET      32.81N  79.73W
05/10/2011  M1.75 INCH       CHARLESTON         SC   PUBLIC

            PUBLIC REPORT OF GOLF BALL SIZE HAIL FROM WILD DUNES.

&&

EVENT NUMBER CHS1100378

JRL

Local storm report, May 10, 11:17 PM EDT, 46 minutes before

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Local storm report, May 10, 11:43 PM EDT, 20 minutes before

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Special weather statement, May 11, 12:03 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:23 PM EDT	Special Marine Warning	CHS		112 min
May 10, 11:08 PM EDT	Special Marine Warning	CHS		2 hr
May 11, 12:38 AM EDT	Special Marine Warning	CHS		2 hr
May 11, 1:10 AM EDT	Special Marine Warning	CHS		2 hr
May 11, 3:49 AM EDT	Special Marine Warning	CHS		84 min
May 11, 4:08 AM EDT	Special Marine Warning	CHS		86 min
May 10, 8:29 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	61 min
May 10, 9:29 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	61 min
May 10, 10:16 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	59 min
May 10, 10:58 PM EDT	Severe Thunderstorm Warning	CHS	Charleston	16 min
May 11, 2:31 AM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Dorchester	59 min
May 11, 3:27 AM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	63 min

Nearby

Special Weather Statements in South Carolina, 2011 Every special weather statement in 2011

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.