Alert archive / Tennessee / Special Weather Statements in 2018

Special Weather Statement, NWS Nashville, TN

June 21, 2018Giles County, Tennessee

NWS Nashville, TN issued this special weather statement at Jun 21, 2018, 8:59 PM CDT for Giles County, Tennessee. It was in force for 46 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: Jun 21, 2018, 8:59 PM CDT (01:59 UTC)
Expired: Jun 21, 2018, 9:45 PM CDT
In force: 46 min
Issued by: NWS Nashville, TN

County Giles County, TN

The radar

The Northeast Alabama radar (KHTX), 85 km from the middle of the area, began a volume at 02:00 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

Little Rock, AR (KBYH), launched 00:00Z, 2.0 hours before the alert went out and 274 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: 293 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 2167 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 Jun 21, 8:51 PM CDT, 8 minutes earlier.

Area forecast discussion, Jun 21, 8:51 PM CDT, 8 minutes before

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Hazardous weather outlook, Jun 21, 2:55 PM CDT, 6 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
255 PM CDT Thu Jun 21 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-222000-
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-
255 PM CDT Thu Jun 21 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...This Afternoon and Tonight.

Strong to severe storms are possible between 5 pm and 9 pm this
evening for areas west of I-65. The main concerns are damaging
straight line winds and hail.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

A few strong to severe storms capable of damaging winds and large
hail will be possible again Friday afternoon. Areas closer to the
Alabama border will have the greatest chance of severe storms.

.SPOTTER INFORMATION STATEMENT...

Reports from spotters of any hail or wind damage to trees, power
lines, or buildings would be appreciated.

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

27

In the hours before

Special weather statement, Jun 21, 7:33 PM CDT, 1 hour 26 minutes before

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Local storm report, Jun 21, 7:38 PM CDT, 1 hour 21 minutes before

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Special weather statement, Jun 21, 7:47 PM CDT, 1 hour 12 minutes before

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Special weather statement, Jun 21, 8:16 PM CDT, 43 minutes before

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Special weather statement, Jun 21, 8:42 PM CDT, 17 minutes before

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Special weather statement, Jun 21, 8:59 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
Jun 21, 7:14 PM CDT	Special Weather Statement	OHX	Lewis, Perry	31 min
Jun 21, 7:33 PM CDT	Special Weather Statement	OHX	Lewis, Wayne	42 min
Jun 21, 7:47 PM CDT	Special Weather Statement	OHX	Lewis, Maury	43 min
Jun 21, 8:16 PM CDT	Special Weather Statement	OHX	Lawrence	44 min
Jun 21, 8:42 PM CDT	Special Weather Statement	OHX	Sumner	48 min
Jun 22, 12:10 PM CDT	Special Weather Statement	OHX	Lawrence	35 min
Jun 22, 12:14 PM CDT	Special Weather Statement	OHX	Lawrence	31 min
Jun 22, 12:58 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall	32 min
Jun 22, 1:02 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall	28 min
Jun 22, 1:14 PM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	98 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.