Alert archive / Georgia / Flash Flood Watches in 2008

Flash Flood Watch 3, NWS Charleston, SC

August 19, 20086 counties in Georgia

NWS Charleston, SC issued this flash flood watch at Aug 19, 2008, 6:01 PM EDT for 6 counties in Georgia. It took effect at Aug 20, 2008, 4:13 PM EDT. It was in force for 71 hr.

The area

The counties it named.

The facts

Issued: Aug 19, 2008, 6:01 PM EDT (22:01 UTC)
In effect from: Aug 20, 2008, 4:13 PM EDT
Expired: Aug 23, 2008, 3:30 PM EDT
In force: 71 hr
Issued by: NWS Charleston, SC
Flood severity: None

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Long County, GA, Tattnall County, GA

The radar

The Charleston,SC radar (KCLX), 89 km from the middle of the area, began a volume at 22:04 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, 10.0 hours before the alert went out and 187 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: 709 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Aug 19, 5:38 PM EDT, 23 minutes earlier.

Area forecast discussion, Aug 19, 5:38 PM EDT, 23 minutes before

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Hazardous weather outlook, Aug 19, 6:19 AM EDT, 11 hours 42 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
Aug 19, 6:07 AM EDT	Small Craft Advisory	CHS		12 hr
Aug 19, 6:51 AM EDT	Marine Weather Statement	CHS		69 min
Aug 19, 7:20 AM EDT	Special Marine Warning	CHS		55 min
Aug 19, 8:07 AM EDT	Special Marine Warning	CHS		83 min
Aug 19, 9:54 AM EDT	Special Marine Warning	CHS		49 min
Aug 19, 5:33 PM EDT	Hurricane Local Statement	CHS	Berkeley, Colleton	3 days
Aug 19, 5:53 PM EDT	Small Craft Advisory	CHS		39 hr
Aug 19, 5:33 PM EDT	Inland Tropical Storm Watch	CHS	Evans, Long, Tattnall	25 hr
Aug 19, 5:33 PM EDT	Tropical Storm Watch	CHS		30 hr

Nearby

Flash Flood Watches in Georgia, 2008 Flash Flood Watches in South Carolina, 2008 Every flash flood watch in 2008

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.