Alert archive / Tennessee / Heat Advisories in 2012

Heat Advisory 4, NWS Morristown, TN

July 6, 201210 counties in Tennessee

NWS Morristown, TN issued this heat advisory at Jul 6, 2012, 2:28 PM CDT for 10 counties in Tennessee. It took effect at Jul 7, 2012, 11:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jul 6, 2012, 2:28 PM CDT (19:28 UTC)
In effect from
Jul 7, 2012, 11:00 AM CDT
Expired
Jul 7, 2012, 8:00 PM CDT
In force
9 hr
Issued by
NWS Morristown, TN

Counties Bledsoe County, TN, Bradley County, TN, Hamilton County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Sequatchie County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.5 hours before the alert went out and 173 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 2012-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 844 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 2012-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
844 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1469 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this heat advisory went out at Jul 5, 6:23 PM CDT, 20 hours 5 minutes earlier.

Area forecast discussion, Jul 5, 6:23 PM CDT, 20 hours 5 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
723 PM EDT THU JUL 5 2012

.AVIATION...LINE OF THUNDERSTORMS WITH VERY STRONG WINDS CONTINUES
TO MARCH DOWN THROUGH THE AREA...AND SHOULD AFFECT CHA NEAR START
OF PERIOD. WILL INCLUDE MENTION OF GUST TO 50 AT CHA. FOG
DEVELOPMENT TONIGHT LOOKS LIKELY GIVEN RAIN...SO WILL INCLUDE MVFR
VIS AT CHA AND TYS AND LIFR AT TRI. CERTAINLY COULD SEE LOWER
VALUES. WILL MENTION VCTS ALL SITES FRI AFTERNOON.

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...HEAT ADVISORY UNTIL 9 PM EDT /8 PM CDT/ THIS EVENING FOR THE
     FOLLOWING ZONES: BLEDSOE...BRADLEY...HAMILTON...MARION...
     MCMINN...MEIGS...RHEA...SEQUATCHIE...WEST POLK.

     HEAT ADVISORY FROM NOON EDT /11 AM CDT/ TO 9 PM EDT /8 PM CDT/
     FRIDAY FOR THE FOLLOWING ZONES: BLEDSOE...BRADLEY...
     HAMILTON...MARION...MCMINN...MEIGS...RHEA...SEQUATCHIE...
     WEST POLK.

VA...NONE.

&&

LW

Nearby

Heat Advisories in Tennessee, 2012Every heat advisory 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.