Alert archive / Tennessee / Special Weather Statements in 2018

Special Weather Statement, NWS Nashville, TN

March 17, 2018Montgomery County, Tennessee

NWS Nashville, TN issued this special weather statement at Mar 17, 2018, 2:49 AM CDT for Montgomery County, Tennessee. It was in force for 11 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: Mar 17, 2018, 2:49 AM CDT (07:49 UTC)
Expired: Mar 17, 2018, 3:00 AM CDT
In force: 11 min
Issued by: NWS Nashville, TN

County Montgomery County, TN

The radar

The Ft Campbell radar (KHPX), 31 km from the middle of the area, began a volume at 07:48 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, 7.8 hours before the alert went out and 295 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: 754 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1172 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 307 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 9.1

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 Mar 16, 11:30 PM CDT, 3 hours 19 minutes earlier.

Area forecast discussion, Mar 16, 11:30 PM CDT, 3 hours 19 minutes before

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Hazardous weather outlook, Mar 16, 10:58 AM CDT, 15 hours 51 minutes before

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In the hours before

Special weather statement, Mar 17, 1:46 AM CDT, 1 hour 3 minutes before

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Special weather statement, Mar 17, 2:09 AM CDT, 40 minutes before

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Local storm report, Mar 17, 2:35 AM CDT, 14 minutes before

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Special weather statement, Mar 17, 2:44 AM CDT, 5 minutes before

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Special weather statement, Mar 17, 2:49 AM 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
Mar 17, 1:46 AM CDT	Special Weather Statement	OHX	Stewart	29 min
Mar 17, 2:09 AM CDT	Special Weather Statement	OHX	Montgomery	36 min
Mar 17, 2:44 AM CDT	Special Weather Statement	OHX	Robertson	31 min
Mar 17, 2:54 AM CDT	Special Weather Statement	OHX	Cheatham	36 min
Mar 17, 3:29 AM CDT	Special Weather Statement	OHX	Robertson	16 min
Mar 17, 3:43 AM CDT	Special Weather Statement	OHX	Sumner	47 min
Mar 17, 3:47 AM CDT	Special Weather Statement	OHX	Lawrence, Wayne	28 min
Mar 17, 4:11 AM CDT	Special Weather Statement	OHX	Smith, Trousdale	34 min
Mar 17, 4:14 AM CDT	Special Weather Statement	OHX	Rutherford	46 min
Mar 17, 4:16 AM CDT	Special Weather Statement	OHX	Giles, Lawrence	44 min
Mar 17, 4:32 PM CDT	Special Weather Statement	OHX	Van Buren, Warren	43 min
Mar 17, 4:46 PM CDT	Special Weather Statement	OHX	Coffee, Van Buren, Warren	44 min
Mar 17, 5:01 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren	16 min
Mar 17, 5:24 PM CDT	Special Weather Statement	OHX	Van Buren	36 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.