Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Huntsville, AL

October 18, 2012Franklin County, Lawrence County, Limestone County, Alabama

NWS Huntsville, AL issued this special weather statement at Oct 18, 2012, 12:01 AM CDT for Franklin County, Lawrence County, Limestone County, Alabama. It was in force for 44 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: Oct 18, 2012, 12:01 AM CDT (05:01 UTC)
Expired: Oct 18, 2012, 12:45 AM CDT
In force: 44 min
Issued by: NWS Huntsville, AL

Counties Franklin County, AL, Lawrence County, AL, Limestone County, AL

The radar

The Northeast Alabama radar (KHTX), 121 km from the middle of the area, began a volume at 05:01 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 00:00Z, 5.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1963 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 300 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 Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 17, 10:36 PM CDT	Special Weather Statement	HUN	Colbert, Franklin	39 min
Oct 17, 10:37 PM CDT	Special Weather Statement	HUN	Colbert, Franklin	38 min
Oct 17, 11:15 PM CDT	Special Weather Statement	HUN	Colbert, Franklin, Lauderdale	45 min
Oct 18, 12:41 AM CDT	Special Weather Statement	HUN	Cullman, Limestone, Madison, Morgan	49 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement 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.