Alert archive / Tennessee / Special Weather Statements in 2011

Special Weather Statement, NWS Nashville, TN

August 6, 20115 counties in Tennessee

NWS Nashville, TN issued this special weather statement at Aug 6, 2011, 10:39 AM CDT for 5 counties in Tennessee. It was in force for 36 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 6, 2011, 10:39 AM CDT (15:39 UTC)
Expired
Aug 6, 2011, 11:15 AM CDT
In force
36 min
Issued by
NWS Nashville, TN

Counties Rutherford County, TN, Sumner County, TN, Trousdale County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 9 km from the middle of the area, began a volume at 15:41 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, 3.7 hours before the alert went out and 17 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2011-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 542 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2011-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
542 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
1014 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
88 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.

928 
WWUS84 KOHX 061539
SPSOHX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1039 AM CDT SAT AUG 6 2011

TNZ008-009-027>030-059-061-062-075-061615-
BEDFORD-DAVIDSON-MACON-MARSHALL-RUTHERFORD-SMITH-SUMNER-TROUSDALE-
WILLIAMSON-WILSON-
1039 AM CDT SAT AUG 6 2011

...SIGNIFICANT WEATHER ADVISORY FOR BEDFORD...DAVIDSON...MACON...
MARSHALL...RUTHERFORD...SMITH...SUMNER...TROUSDALE...WILLIAMSON AND
WILSON COUNTIES...

AT 1036 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PORTLAND 
...TO 5 MILES SOUTH OF LAKEWOOD... TO 9 MILES SOUTHEAST OF 
FAIRVIEW.....MOVING SOUTHEAST AT 15 MPH.

THESE STORMS WILL PRODUCE TORRENTIAL DOWNPOURS...WHICH WILL LIKELY 
PRODUCE PONDING OF WATER IN LOW LYING AREAS. BECAUSE OF THE 
RELATIVELY SLOW MOVEMENT OF THE STORMS...SOME SPOTS COULD PICK UP
BETWEEN ONE HALF AND ONE INCH OF RAIN WITHIN ONLY A MATTER OF 
MINUTES. BRIEF WIND GUSTS OF 20 TO 30 MPH ARE ALSO POSSIBLE. 

LAT...LON 3649 8597 3597 8627 3561 8658 3592 8706
      3619 8670 3658 8661 3662 8658

$$
19

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 10:07 AM CDTSpecial Weather StatementOHXDavidson53 min

Nearby

Special Weather Statements in Tennessee, 2011Every 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; radar from the NEXRAD Level II archive.