Alert archive / Tennessee / Special Weather Statements in 2011

Special Weather Statement, NWS Nashville, TN

November 21, 20114 counties in Tennessee

NWS Nashville, TN issued this special weather statement at Nov 21, 2011, 9:41 AM CST for 4 counties in Tennessee. It was in force for 49 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: Nov 21, 2011, 9:41 AM CST (15:41 UTC)
Expired: Nov 21, 2011, 10:30 AM CST
In force: 49 min
Issued by: NWS Nashville, TN

Counties Dickson County, TN, Hickman County, TN, Humphreys County, TN, Perry County, TN

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 3.7 hours before the alert went out and 221 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: 2 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 457 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -188 m²/s²
0-3 km storm-relative helicity: -188 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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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Nashville, TN wrote its last area forecast discussion before this special weather statement went out at Nov 21, 5:27 AM CST, 4 hours 14 minutes earlier.

Area forecast discussion, Nov 21, 5:27 AM CST, 4 hours 14 minutes before

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Hazardous weather outlook, Nov 21, 5:48 AM CST, 3 hours 53 minutes before

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In the hours before

Special weather statement, Nov 21, 4:06 AM CST, 5 hours 35 minutes before

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Special weather statement, Nov 21, 4:09 AM CST, 5 hours 32 minutes before

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Local storm report, Nov 21, 6:39 AM CST, 3 hours 2 minutes before

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Special weather statement, Nov 21, 9:41 AM CST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 21, 4:06 AM CST	Special Weather Statement	OHX	Hickman, Lewis, Perry, Wayne	54 min
Nov 21, 4:09 AM CST	Special Weather Statement	OHX	Clay, Fentress, Jackson, Macon, Overton, Pickett and 5 more	66 min

Nearby

Special Weather Statements in Tennessee, 2011 Every special weather statement in 2011

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.