Alert archive / Tennessee / Heat Advisories in 2011

Heat Advisory 3, NWS Nashville, TN

August 2, 201137 counties in Tennessee

NWS Nashville, TN issued this heat advisory at Aug 2, 2011, 3:17 PM CDT for 37 counties in Tennessee. It took effect at Aug 3, 2011, 12:00 PM CDT. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Aug 2, 2011, 3:17 PM CDT (20:17 UTC)
In effect from: Aug 3, 2011, 12:00 PM CDT
Expired: Aug 4, 2011, 10:55 AM CDT
In force: 23 hr
Issued by: NWS Nashville, TN

All 37 counties

Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 30 km from the middle of the area, began a volume at 20:22 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

Birmingham, AL (KBMX), launched 12:00Z, 8.3 hours before the alert went out and 312 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: 2980 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Nashville, TN wrote its last area forecast discussion before this heat advisory went out at Aug 2, 12:28 PM CDT, 2 hours 49 minutes earlier.

Area forecast discussion, Aug 2, 12:28 PM CDT, 2 hours 49 minutes before

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Hazardous weather outlook, Aug 2, 5:14 AM CDT, 10 hours 3 minutes before

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Nearby

Heat Advisories in Tennessee, 2011 Every heat advisory 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.