Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Nashville, TN

August 9, 2021Smith County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 9, 2021, 5:30 PM CDT for Smith County, Tennessee. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 9, 2021, 5:30 PM CDT (22:30 UTC)
Expired: Aug 9, 2021, 6:15 PM CDT
In force: 45 min
Issued by: NWS Nashville, TN
Hail: 0.25 in
Wind: 40

County Smith County, TN

The radar

The Nashville radar (KOHX), 64 km from the middle of the area, began a volume at 22:29 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.

What was reported inside it

Time	Report	Where	Remark
Aug 9, 6:01 PM CDT	HAIL 0.88	4 Se Carthage, TN	FACEBOOK REPORT OF NICKEL SIZE HAIL IN ELMWOOD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.5 hours before the alert went out and 67 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.

982 
WWUS84 KOHX 092230
SPSOHX

Special Weather Statement
National Weather Service Nashville TN
530 PM CDT Mon Aug 9 2021
 
TNZ030>032-092315-
Putnam TN-Jackson TN-Smith TN-
530 PM CDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of central Smith,
southwestern Jackson and west central Putnam Counties through 615 PM
CDT...

At 530 PM CDT, Doppler radar was tracking a strong thunderstorm over
Gordonsville, or near Carthage, moving northeast at 5 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Carthage, Baxter, Gordonsville, Hickman, South Carthage and
Granville.

This includes Interstate 40 between mile markers 254 and 268.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3618 8562 3612 8580 3613 8581 3612 8583
      3613 8584 3609 8587 3612 8591 3610 8591
      3611 8593 3610 8595 3611 8596 3609 8599
      3625 8608 3640 8577
TIME...MOT...LOC 2230Z 237DEG 6KT 3620 8594 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

Adcock

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, 4:48 PM CDT	Special Weather Statement	OHX	Fentress	12 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, 5:44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.