Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Nashville, TN

July 14, 2017Williamson County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 14, 2017, 1:50 PM CDT for Williamson County, Tennessee. It was in force for 25 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 14, 2017, 1:50 PM CDT (18:50 UTC)
Expired: Jul 14, 2017, 2:15 PM CDT
In force: 25 min
Issued by: NWS Nashville, TN

County Williamson County, TN

The radar

The Nashville radar (KOHX), 61 km from the middle of the area, began a volume at 18:49 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, 6.8 hours before the alert went out and 49 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: 1105 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 14, 12:26 PM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jul 14, 12:26 PM CDT, 1 hour 24 minutes before

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Hazardous weather outlook, Jul 14, 5:20 AM CDT, 8 hours 30 minutes before

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In the hours before

Special weather statement, Jul 14, 12:50 PM CDT, 1 hour before

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Special weather statement, Jul 14, 12:56 PM CDT, 54 minutes before

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Special weather statement, Jul 14, 1:08 PM CDT, 42 minutes before

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Special weather statement, Jul 14, 1:22 PM CDT, 28 minutes before

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Special weather statement, Jul 14, 1:27 PM CDT, 23 minutes before

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Special weather statement, Jul 14, 1:50 PM CDT, 0 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 14, 11:24 AM CDT	Special Weather Statement	OHX	Maury	36 min
Jul 14, 11:59 AM CDT	Special Weather Statement	OHX	Rutherford	31 min
Jul 14, 12:19 PM CDT	Special Weather Statement	OHX	Smith	41 min
Jul 14, 12:28 PM CDT	Special Weather Statement	OHX	Dickson	32 min
Jul 14, 12:37 PM CDT	Special Weather Statement	OHX	Wayne	23 min
Jul 14, 12:41 PM CDT	Special Weather Statement	OHX	Williamson	34 min
Jul 14, 12:50 PM CDT	Special Weather Statement	OHX	Warren	25 min
Jul 14, 12:56 PM CDT	Special Weather Statement	OHX	DeKalb	34 min
Jul 14, 1:08 PM CDT	Special Weather Statement	OHX	Clay, Jackson	52 min
Jul 14, 1:16 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	119 min
Jul 14, 1:22 PM CDT	Special Weather Statement	OHX	Rutherford	53 min
Jul 14, 1:27 PM CDT	Special Weather Statement	OHX	Van Buren	48 min
Jul 14, 1:57 PM CDT	Special Weather Statement	OHX	Wayne	33 min
Jul 14, 2:07 PM CDT	Areal Flood Advisory	OHX	Overton	113 min
Jul 14, 2:18 PM CDT	Areal Flood Advisory	OHX	Wayne	117 min
Jul 14, 2:29 PM CDT	Areal Flood Advisory	OHX	Williamson	2 hr
Jul 14, 3:01 PM CDT	Areal Flood Advisory	OHX	Wayne	119 min
Jul 14, 3:13 PM CDT	Areal Flood Advisory	OHX	Hickman, Perry	2 hr

Nearby

Special Weather Statements in Tennessee, 2017 Every special weather statement in 2017

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.