Alert archive / Alabama / Areal Flood Advisories in 2012

Areal Flood Advisory 64, NWS Mobile, AL

August 3, 2012Mobile County, Alabama

NWS Mobile, AL issued this areal flood advisory at Aug 3, 2012, 3:22 PM CDT for Mobile County, Alabama. It was in force for 113 min.

The area

The counties it named.

The facts

Issued
Aug 3, 2012, 3:22 PM CDT (20:22 UTC)
Expired
Aug 3, 2012, 5:15 PM CDT
In force
113 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Mobile County, AL

The radar

The Mobile radar (KMOB), 4 km from the middle of the area, began a volume at 20:23 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.4 hours before the alert went out and 152 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, Slidell Radar S, LA at 12:00Z on 2012-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4172 joules per kilogram.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2012-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -74 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
4172 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-74 m²/s²
0-3 km storm-relative helicity
-37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 3:33 PM CDTSevere Thunderstorm WarningMOBMobile42 min
Aug 3, 4:20 PM CDTSevere Thunderstorm WarningMOBCovington25 min
Aug 3, 4:40 PM CDTSevere Thunderstorm WarningMOBButler, Conecuh35 min
Aug 3, 5:12 PM CDTSevere Thunderstorm WarningMOBWashington20 min
Aug 3, 2:32 PM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa43 min

Nearby

Areal 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.