Alert archive / Florida / Areal Flood Advisories in 2012

Areal Flood Advisory 2, NWS Tallahassee, FL

February 18, 2012Holmes County, Walton County, Florida; Coffee County, Geneva County, Alabama

NWS Tallahassee, FL issued this areal flood advisory at Feb 18, 2012, 6:49 PM CST for Holmes County, Walton County, Florida; Coffee County, Geneva County, Alabama. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Feb 18, 2012, 6:49 PM CST (00:49 UTC)
Expired
Feb 18, 2012, 9:45 PM CST
In force
3 hr
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Coffee County, AL, Geneva County, AL, Holmes County, FL, Walton County, FL

The radar

The Eglin Afb radar (KEVX), 48 km from the middle of the area, began a volume at 00:50 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, 0.8 hours before the alert went out and 171 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 00:00Z on 2012-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 2012-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 6:41 PM CSTSevere Thunderstorm WarningTAEHolmes, Walton49 min
Feb 18, 7:17 PM CSTSevere Thunderstorm WarningTAEHolmes, Jackson, Washington43 min
Feb 18, 7:34 PM CSTSevere Thunderstorm WarningTAEJackson41 min
Feb 18, 7:57 PM CSTFlash Flood WarningTAEHolmes, Jackson, Walton, Washington2 hr
Feb 18, 8:45 PM CSTSpecial Marine WarningTAE2 hr
Feb 18, 8:50 PM CSTSevere Thunderstorm WarningTAEJackson40 min
Feb 18, 9:41 PM CSTFlash Flood WarningTAEHolmes, Jackson, Walton, Washington4 hr
Feb 18, 10:38 PM CSTSpecial Marine WarningTAE112 min
Feb 19, 12:15 AM CSTAreal Flood AdvisoryTAELeon60 min
Feb 19, 1:20 AM CSTAreal Flood AdvisoryTAELeon85 min
Feb 18, 6:24 PM CSTSevere Thunderstorm WarningTAEClay, Early, Miller51 min
Feb 18, 7:15 PM CSTSevere Thunderstorm WarningTAEBaker, Calhoun, Early, Miller45 min
Feb 18, 7:53 PM CSTSevere Thunderstorm WarningTAEBaker, Decatur, Early, Miller, Mitchell, Seminole37 min
Feb 18, 8:10 PM CSTSevere Thunderstorm WarningTAEBaker, Dougherty, Lee, Mitchell, Worth50 min
Feb 18, 8:11 PM CSTSevere Thunderstorm WarningTAEDecatur, Grady49 min
Feb 18, 8:12 PM CSTAreal Flood AdvisoryTAEBaker, Calhoun, Colquitt, Decatur, Dougherty, Early and 8 more2 hr
Feb 18, 8:22 PM CSTSevere Thunderstorm WarningTAEColquitt, Mitchell38 min
Feb 18, 8:39 PM CSTSevere Thunderstorm WarningTAEBrooks, Colquitt, Thomas51 min
Feb 18, 8:44 PM CSTAreal Flood AdvisoryTAEBerrien, Brooks, Colquitt, Cook, Dougherty, Grady and 7 more2 hr
Feb 18, 8:57 PM CSTSevere Thunderstorm WarningTAEBen Hill, Berrien, Irwin, Tift, Turner, Worth48 min
Feb 18, 9:02 PM CSTSevere Thunderstorm WarningTAEBerrien, Brooks, Colquitt, Cook, Lanier, Lowndes43 min
Feb 18, 9:30 PM CSTTornado WarningTAEBerrien, Lanier30 min
Feb 18, 9:46 PM CSTSevere Thunderstorm WarningTAEBerrien, Lanier14 min
Feb 18, 10:47 PM CSTAreal Flood AdvisoryTAEDecatur, Grady, Seminole, Thomas118 min
Feb 19, 10:12 AM CSTRiver Flood WarningTAELee27 hr

Nearby

Areal Flood Advisories in Florida, 2012Areal Flood Advisories in Alabama, 2012Every areal flood advisory 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.