Alert archive / Georgia / Flash Flood Watches in 2013

Flash Flood Watch 9, NWS Tallahassee, FL

August 18, 201316 counties in Florida; 26 counties in Georgia; 5 counties in Alabama

NWS Tallahassee, FL issued this flash flood watch at Aug 18, 2013, 5:05 AM CDT for 16 counties in Florida; 26 counties in Georgia; 5 counties in Alabama. It was in force for 38 hr.

The area

The counties it named.

The facts

Issued: Aug 18, 2013, 5:05 AM CDT (10:05 UTC)
Expired: Aug 19, 2013, 7:00 PM CDT
In force: 38 hr
Issued by: NWS Tallahassee, FL
Flood severity: None

All 47 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 66 km from the middle of the area, began a volume at 10:07 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 10.1 hours before the alert went out and 66 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: 150 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 789 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -45 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.7

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 Tallahassee, FL wrote its last area forecast discussion before this flash flood watch went out at Aug 18, 4:58 AM CDT, 7 minutes earlier.

Area forecast discussion, Aug 18, 4:58 AM CDT, 7 minutes before

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In the hours before

Local storm report, Aug 17, 11:08 PM CDT, 5 hours 57 minutes before

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</head>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 8:49 PM CDT	River Flood Warning	TAE	Calhoun	9 days
Aug 17, 11:00 PM CDT	River Flood Warning	TAE	Holmes, Washington	9 days
Aug 17, 11:00 PM CDT	River Flood Warning	TAE	Walton	12 days
Aug 18, 1:45 AM CDT	Rip Current Statement	TAE	Bay, Gulf, Walton	17 hr
Aug 18, 5:41 AM CDT	Special Marine Warning	TAE		2 hr
Aug 18, 6:37 AM CDT	River Flood Warning	TAE	Walton	13 hr
Aug 18, 9:08 AM CDT	River Flood Advisory	TAE	Calhoun	20 hr
Aug 18, 10:18 AM CDT	Special Marine Warning	TAE		27 min
Aug 18, 10:25 AM CDT	Special Marine Warning	TAE		50 min
Aug 18, 11:10 AM CDT	Special Marine Warning	TAE		50 min
Aug 18, 11:21 AM CDT	Areal Flood Advisory	TAE	Walton	3 hr
Aug 18, 11:40 AM CDT	Areal Flood Advisory	TAE	Franklin	3 hr
Aug 18, 12:00 PM CDT	Severe Thunderstorm Warning	TAE	Franklin, Wakulla	45 min
Aug 18, 12:08 PM CDT	Special Weather Statement	TAE	Liberty	52 min
Aug 18, 12:14 PM CDT	Areal Flood Advisory	TAE	Wakulla	3 hr
Aug 18, 12:17 PM CDT	Areal Flood Advisory	TAE	Liberty	3 hr
Aug 18, 12:50 PM CDT	Flash Flood Warning	TAE	Bay, Walton, Washington	3 hr
Aug 18, 1:16 PM CDT	Flash Flood Warning	TAE	Franklin, Wakulla	3 hr
Aug 18, 1:48 PM CDT	Flash Flood Warning	TAE	Holmes, Jackson, Washington	3 hr
Aug 18, 1:54 PM CDT	Severe Thunderstorm Warning	TAE	Walton	51 min
Aug 18, 3:57 PM CDT	Flash Flood Warning	TAE	Bay, Holmes, Jackson, Walton, Washington	3 hr
Aug 18, 4:09 PM CDT	River Flood Warning	TAE	Gadsden, Leon	11 days
Aug 18, 4:09 PM CDT	River Flood Warning	TAE	Gadsden, Leon	13 days
Aug 18, 4:37 PM CDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison, Taylor	38 min
Aug 18, 5:22 PM CDT	Special Weather Statement	TAE	Jefferson	53 min
Aug 18, 3:18 PM CDT	River Flood Warning	TAE	Decatur, Miller, Seminole	58 hr
Aug 18, 4:09 PM CDT	River Flood Warning	TAE	Grady, Thomas	6 days

Nearby

Flash Flood Watches in Georgia, 2013 Flash Flood Watches in Florida, 2013 Flash Flood Watches in Alabama, 2013 Every flash flood watch in 2013

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.