Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Nashville, TN

August 11, 2017Giles County, Lawrence County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 11, 2017, 5:33 PM CDT for Giles County, Lawrence County, Tennessee. It was in force for 57 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: Aug 11, 2017, 5:33 PM CDT (22:33 UTC)
Expired: Aug 11, 2017, 6:30 PM CDT
In force: 57 min
Issued by: NWS Nashville, TN

Counties Giles County, TN, Lawrence County, TN

The radar

The Northeast Alabama radar (KHTX), 102 km from the middle of the area, began a volume at 22:35 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, 10.6 hours before the alert went out and 118 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: 732 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 9:43 PM CDT	Special Weather Statement	OHX	Lawrence	32 min
Aug 10, 10:14 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	2 hr
Aug 10, 11:21 PM CDT	Areal Flood Advisory	OHX	Giles, Lawrence	114 min
Aug 11, 1:47 PM CDT	Areal Flood Advisory	OHX	Marshall	118 min
Aug 11, 2:59 PM CDT	Areal Flood Advisory	OHX	Marshall, Maury	2 hr
Aug 11, 3:20 PM CDT	Flash Flood Warning	OHX	Marshall	3 hr
Aug 11, 6:05 PM CDT	Areal Flood Warning	OHX	Giles	3 hr

Nearby

Special Weather Statements in Tennessee, 2017 Every special weather statement in 2017

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.