Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Birmingham, AL

September 5, 2015Calhoun County, Alabama

NWS Birmingham, AL issued this special weather statement at Sep 5, 2015, 3:16 PM CDT for Calhoun County, Alabama. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 5, 2015, 3:16 PM CDT (20:16 UTC)
Expired
Sep 5, 2015, 3:45 PM CDT
In force
29 min
Issued by
NWS Birmingham, AL

County Calhoun County, AL

The radar

The Birmingham radar (KBMX), 96 km from the middle of the area, began a volume at 20:19 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 146 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, Peachtre/Fal Fld, GA at 12:00Z on 2015-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 459 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, Peachtre/Fal Fld, GA at 12:00Z on 2015-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
459 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
881 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 1:26 PM CDTSpecial Weather StatementBMXTalladega34 min
Sep 5, 2:03 PM CDTSpecial Weather StatementBMXTalladega27 min
Sep 5, 2:11 PM CDTSpecial Weather StatementBMXJefferson34 min
Sep 5, 2:17 PM CDTSpecial Weather StatementBMXCherokee28 min
Sep 5, 2:31 PM CDTSpecial Weather StatementBMXShelby29 min
Sep 5, 2:36 PM CDTSpecial Weather StatementBMXShelby24 min
Sep 5, 2:54 PM CDTSpecial Weather StatementBMXTuscaloosa36 min
Sep 5, 3:07 PM CDTSpecial Weather StatementBMXBibb38 min
Sep 5, 3:08 PM CDTSpecial Weather StatementBMXShelby37 min
Sep 5, 3:21 PM CDTAreal Flood AdvisoryBMXJefferson, Shelby3 hr
Sep 5, 3:40 PM CDTAreal Flood AdvisoryBMXCalhoun3 hr
Sep 5, 4:43 PM CDTSpecial Weather StatementBMXWalker32 min
Sep 5, 5:06 PM CDTSpecial Weather StatementBMXFayette24 min

Nearby

Special Weather Statements in Alabama, 2015Every special weather statement in 2015

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.