Alert archive / Tennessee / Heat Advisories in 2015

Heat Advisory 3, NWS Nashville, TN

July 28, 201521 counties in Tennessee

NWS Nashville, TN issued this heat advisory at Jul 28, 2015, 11:26 AM CDT for 21 counties in Tennessee. It took effect at Jul 28, 2015, 12:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 28, 2015, 11:26 AM CDT (16:26 UTC)
In effect from: Jul 28, 2015, 12:00 PM CDT
Expired: Jul 28, 2015, 7:00 PM CDT
In force: 7 hr
Issued by: NWS Nashville, TN

All 21 counties

Bedford County, TN, Cheatham County, TN, Davidson County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Stewart County, TN, Sumner County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 65 km from the middle of the area, began a volume at 16:28 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, 4.4 hours before the alert went out and 56 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: 1085 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 91 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 Jul 28, 11:00 AM CDT, 26 minutes earlier.

Area forecast discussion, Jul 28, 11:00 AM CDT, 26 minutes before

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Hazardous weather outlook, Jul 28, 5:13 AM CDT, 6 hours 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:48 PM CDT	Special Weather Statement	OHX	Macon	27 min
Jul 28, 1:34 PM CDT	Special Weather Statement	OHX	Wilson	41 min
Jul 28, 1:39 PM CDT	Special Weather Statement	OHX	Smith, Trousdale	51 min
Jul 28, 2:23 PM CDT	Special Weather Statement	OHX	DeKalb	52 min
Jul 28, 3:09 PM CDT	Special Weather Statement	OHX	Sumner	51 min
Jul 28, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	33 min
Jul 28, 3:40 PM CDT	Special Weather Statement	OHX	Grundy	50 min
Jul 28, 3:57 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	33 min
Jul 28, 4:12 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	33 min
Jul 28, 4:38 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford, Williamson	22 min
Jul 28, 5:00 PM CDT	Special Weather Statement	OHX	Rutherford	45 min
Jul 28, 6:58 PM CDT	Special Weather Statement	OHX	Montgomery	32 min

Nearby

Heat Advisories in Tennessee, 2015 Every heat advisory in 2015

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.