Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

May 17, 2012Charleston County, South Carolina

NWS Charleston, SC issued this special weather statement at May 17, 2012, 3:19 AM EDT for Charleston County, South Carolina. It was in force for 26 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 17, 2012, 3:19 AM EDT (07:19 UTC)
Expired: May 17, 2012, 3:45 AM EDT
In force: 26 min
Issued by: NWS Charleston, SC

County Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 96 km from the middle of the area, began a volume at 07:23 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, 7.3 hours before the alert went out and 11 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: 1393 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1014 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 17, 1:54 AM EDT, 1 hour 25 minutes earlier.

Area forecast discussion, May 17, 1:54 AM EDT, 1 hour 25 minutes before

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Hazardous weather outlook, May 16, 4:22 PM EDT, 10 hours 57 minutes before

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In the hours before

Local storm report, May 16, 9:56 PM EDT, 5 hours 23 minutes before

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Local storm report, May 16, 10:02 PM EDT, 5 hours 17 minutes before

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Special weather statement, May 17, 1:25 AM EDT, 1 hour 54 minutes before

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Special weather statement, May 17, 3:19 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 17, 1:09 AM EDT	Special Marine Warning	CHS		111 min
May 17, 2:52 AM EDT	Special Marine Warning	CHS		93 min
May 17, 2:40 PM EDT	Special Weather Statement	CHS	McIntosh	35 min
May 17, 2:44 PM EDT	Special Weather Statement	CHS	Bryan	31 min
May 17, 2:56 PM EDT	Severe Thunderstorm Warning	CHS	McIntosh	47 min
May 17, 2:59 PM EDT	Special Weather Statement	CHS	Effingham	31 min
May 17, 3:29 PM EDT	Special Marine Warning	CHS		61 min
May 17, 3:39 PM EDT	Special Weather Statement	CHS	Chatham	36 min
May 17, 3:45 PM EDT	Special Weather Statement	CHS	Effingham	30 min
May 17, 3:53 PM EDT	Small Craft Advisory	CHS		4 days
May 17, 3:53 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Effingham	67 min
May 17, 4:23 PM EDT	Special Weather Statement	CHS	Chatham	37 min
May 17, 4:45 PM EDT	Areal Flood Advisory	CHS	Chatham	60 min
May 17, 4:51 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Candler, Evans, Screven	54 min
May 17, 6:19 PM EDT	Special Weather Statement	CHS	Jenkins	41 min
May 17, 7:27 PM EDT	Special Weather Statement	CHS	Long	33 min
May 16, 8:03 PM EDT	Areal Flood Advisory	CHS	Berkeley	42 min
May 16, 8:27 PM EDT	Flash Flood Warning	CHS	Berkeley	2 hr
May 16, 9:20 PM EDT	Areal Flood Advisory	CHS	Charleston	2 hr
May 17, 1:25 AM EDT	Special Weather Statement	CHS	Charleston	50 min
May 17, 2:11 AM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	3 hr
May 17, 4:35 AM EDT	Areal Flood Advisory	CHS	Charleston	115 min
May 17, 12:53 PM EDT	Special Weather Statement	CHS	Berkeley	37 min
May 17, 1:12 PM EDT	Areal Flood Advisory	CHS	Berkeley, Dorchester	93 min
May 17, 1:25 PM EDT	Special Weather Statement	CHS	Dorchester	65 min
May 17, 1:29 PM EDT	Special Weather Statement	CHS	Hampton	61 min
May 17, 2:12 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Colleton, Dorchester	93 min
May 17, 2:32 PM EDT	Special Weather Statement	CHS	Colleton, Hampton	58 min
May 17, 2:49 PM EDT	Special Weather Statement	CHS	Jasper	56 min
May 17, 3:04 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton	17 min

Nearby

Special Weather Statements in South Carolina, 2012 Every special weather statement in 2012

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.