Alert archive / Tennessee / Special Weather Statements in 2018

Special Weather Statement, NWS Nashville, TN

May 30, 2018Cheatham County, Tennessee

NWS Nashville, TN issued this special weather statement at May 30, 2018, 4:36 PM CDT for Cheatham County, Tennessee. It was in force for 24 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: May 30, 2018, 4:36 PM CDT (21:36 UTC)
Expired: May 30, 2018, 5:00 PM CDT
In force: 24 min
Issued by: NWS Nashville, TN

County Cheatham County, TN

The radar

The Nashville radar (KOHX), 43 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 43 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: 695 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 173 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 May 30, 1:41 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, May 30, 1:41 PM CDT, 2 hours 55 minutes before

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Hazardous weather outlook, May 30, 6:38 AM CDT, 9 hours 58 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
638 AM CDT Wed May 30 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-311000-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-
Jackson-Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-
Maury-Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-
Coffee-Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
638 AM CDT Wed May 30 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

From the afternoon through the evening hours on Thursday,
a slight risk of severe thunderstorms is expected for most
of the mid state, expect for far southern portions of the
mid state where a marginal risk of severe thunderstorms is
expected. Damaging winds and large hail will be the primary
threats.

There is a slight potential that rainfall experienced Thursday
through Thursday night may lead to flash flooding across the
mid state region.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed on Thursday.

Spotter Thunderstorm Reporting Criteria...
Tornado
Funnel Cloud
Hail >= 1/2 inch
Winds > 50 MPH (Measured)
Structural Damage
Trees or Power Lines Down

31

In the hours before

Special weather statement, May 30, 3:26 PM CDT, 1 hour 10 minutes before

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Special weather statement, May 30, 3:56 PM CDT, 40 minutes before

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Special weather statement, May 30, 4:08 PM CDT, 28 minutes before

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Special weather statement, May 30, 4:15 PM CDT, 21 minutes before

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Special weather statement, May 30, 4:36 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
May 29, 8:05 PM CDT	Special Weather Statement	OHX	Van Buren	25 min
May 29, 8:38 PM CDT	Special Weather Statement	OHX	White	37 min
May 29, 9:51 PM CDT	Areal Flood Advisory	OHX	Perry	114 min
May 30, 3:26 PM CDT	Special Weather Statement	OHX	Houston, Stewart	34 min
May 30, 3:56 PM CDT	Special Weather Statement	OHX	Houston	34 min
May 30, 4:08 PM CDT	Special Weather Statement	OHX	Wayne	52 min
May 30, 4:15 PM CDT	Special Weather Statement	OHX	Dickson	30 min
May 30, 4:58 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Robertson	62 min
May 30, 5:07 PM CDT	Special Weather Statement	OHX	Giles, Lawrence	23 min
May 30, 5:13 PM CDT	Special Weather Statement	OHX	Maury	62 min
May 30, 5:46 PM CDT	Special Weather Statement	OHX	Davidson, Rutherford, Trousdale, Williamson, Wilson	59 min
May 30, 5:48 PM CDT	Special Weather Statement	OHX	Bedford, Marshall, Maury	57 min
May 30, 6:42 PM CDT	Special Weather Statement	OHX	Cannon, Rutherford, Smith, Trousdale, Wilson	63 min

Nearby

Special Weather Statements in Tennessee, 2018 Every special weather statement in 2018

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.