Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 170, NWS Nashville, TN

July 18, 20237 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 18, 2023, 3:21 PM CDT for 7 counties in Tennessee. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 18, 2023, 3:21 PM CDT (20:21 UTC)
Expired: Jul 18, 2023, 4:15 PM CDT
In force: 54 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Cheatham County, TN, Davidson County, TN, Robertson County, TN, Rutherford County, TN, Sumner County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 13 km from the middle of the area, began a volume at 20:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 18, 1:09 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.4 hours before the alert went out and 10 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: 2404 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 18, 1:54 PM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, Jul 18, 1:54 PM CDT, 1 hour 27 minutes before

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In the hours before

Special weather statement, Jul 18, 12:49 PM CDT, 2 hours 32 minutes before

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Local storm report, Jul 18, 2:26 PM CDT, 55 minutes before

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Local storm report, Jul 18, 2:38 PM CDT, 43 minutes before

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Local storm report, Jul 18, 2:57 PM CDT, 24 minutes before

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Local storm report, Jul 18, 2:58 PM CDT, 23 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 18, 7:28 AM CDT	Special Weather Statement	OHX	Pickett	32 min
Jul 18, 7:57 AM CDT	Special Weather Statement	OHX	Fentress, Pickett	63 min
Jul 18, 11:18 AM CDT	Flood Watch	OHX	Bedford, Cheatham, Davidson, Dickson, Hickman, Houston and 14 more	25 hr
Jul 18, 12:49 PM CDT	Special Weather Statement	OHX	Cheatham	41 min
Jul 18, 1:51 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery, Stewart	54 min
Jul 18, 2:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson and 1 more	65 min
Jul 18, 3:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	Cheatham, Dickson, Hickman, Humphreys, Lewis, Maury and 2 more	63 min
Jul 18, 3:52 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury, Wayne	68 min
Jul 18, 4:11 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Davidson, Lewis, Marshall, Maury, Rutherford and 1 more	49 min
Jul 18, 4:13 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, DeKalb, Macon, Rutherford, Smith and 3 more	47 min
Jul 18, 4:56 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee, Giles, Grundy, Lawrence, Marshall and 1 more	18 min
Jul 18, 5:00 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, DeKalb, Grundy, Putnam, Rutherford and 5 more	45 min
Jul 18, 5:42 PM CDT	Special Weather Statement	OHX	Coffee, DeKalb, Grundy, Van Buren, Warren, White	48 min
Jul 18, 6:52 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	38 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2023 Every severe thunderstorm warning in 2023

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.