Alert archive / Alabama / Flash Flood Warnings in 2010

Flash Flood Warning 46, NWS Huntsville, AL

August 3, 2010Lauderdale County, Alabama

NWS Huntsville, AL issued this flash flood warning at Aug 3, 2010, 2:17 PM CDT for Lauderdale County, Alabama. It was in force for 82 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 3, 2010, 2:17 PM CDT (19:17 UTC)
Expired
Aug 3, 2010, 3:39 PM CDT
In force
82 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Flood severity
None

County Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 128 km from the middle of the area, began a volume at 19:19 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.3 hours before the alert went out and 167 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, Nashville Metro, TN at 12:00Z on 2010-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 252 joules per kilogram.LCLLFCEL10008507005003002001001 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, Nashville Metro, TN at 12:00Z on 2010-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
252 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
1185 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 1:39 PM CDTSpecial Weather StatementHUNLauderdale51 min
Aug 3, 2:07 PM CDTSpecial Weather StatementHUNCullman23 min
Aug 3, 2:30 PM CDTSpecial Weather StatementHUNLauderdale45 min
Aug 3, 2:41 PM CDTSpecial Weather StatementHUNCullman49 min
Aug 3, 2:51 PM CDTSpecial Weather StatementHUNColbert39 min
Aug 3, 3:15 PM CDTSevere Thunderstorm WarningHUNColbert30 min
Aug 3, 3:28 PM CDTSpecial Weather StatementHUNFranklin32 min
Aug 3, 3:59 PM CDTSevere Thunderstorm WarningHUNFranklin31 min

Nearby

Flash Flood Warnings in Alabama, 2010Every flash flood warning in 2010

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.