Alert archive / Tennessee / Special Weather Statements in 2015

Special Weather Statement, NWS Huntsville, AL

July 22, 2015Franklin County, Tennessee

NWS Huntsville, AL issued this special weather statement at Jul 22, 2015, 1:21 PM CDT for Franklin County, Tennessee. It was in force for 39 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: Jul 22, 2015, 1:21 PM CDT (18:21 UTC)
Expired: Jul 22, 2015, 2:00 PM CDT
In force: 39 min
Issued by: NWS Huntsville, AL

County Franklin County, TN

The radar

The Northeast Alabama radar (KHTX), 41 km from the middle of the area, began a volume at 18:23 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.4 hours before the alert went out and 102 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: 9 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 936 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 16 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
Jul 22, 6:50 AM CDT	Special Weather Statement	HUN	Franklin	40 min
Jul 22, 1:42 PM CDT	Special Weather Statement	HUN	Marshall	33 min
Jul 22, 6:23 PM CDT	Special Weather Statement	HUN	Colbert	22 min
Jul 22, 2:01 PM CDT	Special Weather Statement	HUN	Franklin	44 min

Nearby

Special Weather Statements in Tennessee, 2015 Every 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.