Alert archive / South Carolina / Flash Flood Warnings in 2007

Flash Flood Warning 2, NWS Charleston, SC

July 14, 2007Charleston County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jul 14, 2007, 1:17 PM EDT for Charleston County, South Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 14, 2007, 1:17 PM EDT (17:17 UTC)
Expired: Jul 14, 2007, 4:15 PM EDT
In force: 3 hr
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text
Flood severity: None

County Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 103 km from the middle of the area, began a volume at 17:21 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 12:00Z, 5.3 hours before the alert went out and 18 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: 1038 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning 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 flash flood warning went out at Jul 14, 11:04 AM EDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jul 14, 11:04 AM EDT, 2 hours 13 minutes before

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Hazardous weather outlook, Jul 14, 4:39 AM EDT, 8 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
439 AM EDT SAT JUL 14 2007

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>051-151000-
CHARLESTON HARBOR-
WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM...INCLUDING
GRAYS REEF NATIONAL MARINE SANCTUARY-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS-
INLAND BRYAN-COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG-
INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH-
ALLENDALE-HAMPTON-INLAND COLLETON-DORCHESTER-BERKELEY-INLAND JASPER-
BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER-
439 AM EDT SAT JUL 14 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL
WATERS...SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

STRONG THUNDERSTORMS...THERE IS A CHANCE OF STRONG THUNDERSTORMS
ACROSS THE AREA TODAY...MAINLY DURING THE AFTERNOON AND EVENING.
ISOLATED THUNDERSTORMS MAY PRODUCE STRONG WIND GUSTS EXCEEDING
50 MPH. HOWEVER...THE MOST PREVALENT HAZARDS WILL INCLUDE LOCALLY
EXCESSIVE RAINFALL AND LIGHTNING STRIKES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

STRONG THUNDERSTORMS...THERE IS A CHANCE OF STRONG THUNDERSTORMS
ACROSS THE AREA SUNDAY AFTERNOON AND EVENING. THE PRIMARY WEATHER
HAZARDS WILL BE GUSTY WINDS...LIGHTNING STRIKES AND VERY HEAVY
RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND SUNDAY.

In the hours before

Special weather statement, Jul 14, 11:19 AM EDT, 1 hour 58 minutes before

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Special weather statement, Jul 14, 12:23 PM EDT, 54 minutes before

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Local storm report, Jul 14, 12:46 PM EDT, 31 minutes before

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Special weather statement, Jul 14, 12:57 PM EDT, 20 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
Jul 14, 4:03 AM EDT	Marine Weather Statement	CHS		117 min
Jul 14, 6:02 AM EDT	Marine Weather Statement	CHS		118 min
Jul 14, 7:07 AM EDT	Marine Weather Statement	CHS		113 min
Jul 14, 8:12 AM EDT	Special Marine Warning	CHS		94 min
Jul 14, 8:59 AM EDT	Special Marine Warning	CHS		92 min
Jul 14, 11:23 AM EDT	Marine Weather Statement	CHS		67 min
Jul 14, 4:19 PM EDT	Severe Thunderstorm Warning	CHS	Chatham	41 min
Jul 14, 4:39 PM EDT	Special Marine Warning	CHS		96 min
Jul 14, 4:53 PM EDT	Areal Flood Advisory	CHS	Chatham	97 min
Jul 14, 6:16 PM EDT	Special Marine Warning	CHS		47 min
Jul 14, 6:34 PM EDT	Marine Weather Statement	CHS		56 min
Jul 14, 7:29 PM EDT	Marine Weather Statement	CHS		61 min
Jul 14, 10:26 AM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	64 min
Jul 14, 11:33 AM EDT	Areal Flood Advisory	CHS	Charleston	87 min
Jul 14, 1:13 PM EDT	Severe Thunderstorm Warning	CHS	Charleston	47 min

Nearby

Flash Flood Warnings in South Carolina, 2007 Every flash flood warning in 2007

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.