Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Nashville, TN

August 9, 2021Fentress County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 9, 2021, 4:48 PM CDT for Fentress County, Tennessee. It was in force for 12 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 9, 2021, 4:48 PM CDT (21:48 UTC)
Expired: Aug 9, 2021, 5:00 PM CDT
In force: 12 min
Issued by: NWS Nashville, TN
Hail: 0.00 in
Wind: 30

County Fentress County, TN

The radar

The Knoxville radar (KMRX), 121 km from the middle of the area, began a volume at 21:49 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, 9.8 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: 788 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

170 
WWUS84 KOHX 092148
SPSOHX

Special Weather Statement
National Weather Service Nashville TN
448 PM CDT Mon Aug 9 2021
 
TNZ034-092200-
Fentress TN-
448 PM CDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of northeastern
Fentress County through 500 PM CDT...

At 446 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Helenwood, or 11 miles west of Oneida, moving northeast
at 15 mph.

HAZARD...Winds in excess of 30 mph and continuous cloud to ground 
         lightning.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

This storm will remain over mainly rural areas of northeastern
Fentress County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3639 8469 3637 8470 3637 8471 3638 8472
      3637 8473 3635 8473 3650 8483 3653 8479
      3652 8473 3644 8469 3641 8467 3641 8466
      3640 8466
TIME...MOT...LOC 2146Z 241DEG 14KT 3646 8470 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

$$

FB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 4:38 PM CDT	Special Weather Statement	OHX	Jackson	52 min
Aug 9, 4:49 PM CDT	Special Weather Statement	OHX	Fentress	11 min
Aug 9, 4:57 PM CDT	Special Weather Statement	OHX	Smith	33 min
Aug 9, 5:08 PM CDT	Areal Flood Advisory	OHX	Fentress	112 min
Aug 9, 5:30 PM CDT	Special Weather Statement	OHX	Smith	45 min
Aug 9, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam, Smith	31 min
Aug 9, 5:45 PM CDT	Special Weather Statement	OHX	Cumberland	15 min
Aug 9, 5:50 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	25 min
Aug 9, 6:16 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Smith	29 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.