Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

December 29, 2021Marion County, Sequatchie County, Tennessee

NWS Morristown, TN issued this special weather statement at Dec 29, 2021, 6:48 PM CST for Marion County, Sequatchie County, Tennessee. It was in force for 42 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: Dec 29, 2021, 6:48 PM CST (00:48 UTC)
Expired: Dec 29, 2021, 7:30 PM CST
In force: 42 min
Issued by: NWS Morristown, TN
Hail: 0.00 in
Wind: 50

Counties Marion County, TN, Sequatchie County, TN

The radar

The Northeast Alabama radar (KHTX), 60 km from the middle of the area, began a volume at 00:50 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, 0.8 hours before the alert went out and 134 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: 1029 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: -111 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 29, 7:25 PM CST	Special Weather Statement	MRX	Hamilton, Marion, Sequatchie	50 min
Dec 29, 7:41 PM CST	Special Weather Statement	MRX	Meigs, Rhea	49 min
Dec 29, 7:54 PM CST	Special Weather Statement	MRX	Bradley, Hamilton	36 min
Dec 29, 8:08 PM CST	Severe Thunderstorm Warning	MRX	Bradley, McMinn, Polk	24 min
Dec 29, 8:18 PM CST	Special Weather Statement	MRX	Blount, Loudon, Monroe	27 min
Dec 29, 8:27 PM CST	Special Weather Statement	MRX	Bradley	33 min
Dec 29, 8:31 PM CST	Special Weather Statement	MRX	Monroe, Polk	29 min
Dec 29, 8:50 PM CST	Special Weather Statement	MRX	Blount	25 min
Dec 30, 6:21 AM CST	Dense Fog Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Cocke and 18 more	3 hr
Dec 29, 8:53 PM CST	Special Weather Statement	MRX	Cherokee	52 min

Nearby

Special Weather Statements in Tennessee, 2021 Every special weather statement in 2021

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.