Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

July 16, 2012Cannon County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 16, 2012, 7:21 PM CDT for Cannon County, Tennessee. It was in force for 39 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
Jul 16, 2012, 7:21 PM CDT (00:21 UTC)
Expired
Jul 16, 2012, 8:00 PM CDT
In force
39 min
Issued by
NWS Nashville, TN

County Cannon County, TN

The radar

The Nashville radar (KOHX), 55 km from the middle of the area, began a volume at 00:24 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, 0.4 hours before the alert went out and 51 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 00:00Z on 2012-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2447 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2012-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
2447 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1448 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-14 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.

834 
WWUS84 KOHX 170021
SPSOHX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
721 PM CDT MON JUL 16 2012

TNZ028-062-063-170100-
CANNON-RUTHERFORD-WILSON-
721 PM CDT MON JUL 16 2012

...SIGNIFICANT WEATHER ADVISORY FOR CANNON...RUTHERFORD AND WILSON
COUNTIES...

AT 718 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES NORTHWEST OF WOODBURY...MOVING SOUTHEAST 
AT 5 MPH. 

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM AS WELL AS HEAVY 
RAINFALL.

LAT...LON 3595 8598 3592 8596 3574 8611 3591 8633
      3605 8622

$$
11

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:13 PM CDTSevere Thunderstorm WarningOHXGiles21 min
Jul 16, 8:59 PM CDTSpecial Weather StatementOHXCannon2 hr
Jul 16, 9:01 PM CDTSevere Thunderstorm WarningOHXDeKalb29 min
Jul 16, 9:12 PM CDTAreal Flood AdvisoryOHXCannon, Warren63 min
Jul 17, 5:49 PM CDTSpecial Weather StatementOHXWayne26 min

Nearby

Special Weather Statements in Tennessee, 2012Every special weather statement in 2012

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.