Alert archive / Alabama / Areal Flood Advisories in 2012

Areal Flood Advisory 85, NWS Mobile, AL

September 30, 2012Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this areal flood advisory at Sep 30, 2012, 12:15 PM CDT for Baldwin County, Mobile County, Alabama. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Sep 30, 2012, 12:15 PM CDT (17:15 UTC)
Expired
Sep 30, 2012, 2:15 PM CDT
In force
2 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Mobile County, AL

The radar

The Mobile radar (KMOB), 25 km from the middle of the area, began a volume at 17:17 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, 5.3 hours before the alert went out and 172 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 2012-09-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1360 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, Slidell Radar S, LA at 12:00Z on 2012-09-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.193958Sfc1 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
1360 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
552 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 30, 11:15 AM CDTSpecial Marine WarningMOB60 min
Sep 30, 12:14 PM CDTSpecial Marine WarningMOB91 min
Sep 30, 6:08 PM CDTTornado WarningMOBMobile, Washington34 min
Sep 30, 6:29 PM CDTTornado WarningMOBBaldwin28 min
Sep 30, 3:36 PM CDTSevere Thunderstorm WarningMOBGeorge, Perry, Stone54 min
Sep 30, 4:09 PM CDTTornado WarningMOBStone51 min
Sep 30, 4:33 PM CDTTornado WarningMOBPerry, Stone42 min
Sep 30, 5:04 PM CDTTornado WarningMOBGeorge, Greene, Perry, Stone41 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.