Alert archive / Tennessee / Special Weather Statements in 2019

Special Weather Statement, NWS Nashville, TN

August 4, 2019Robertson County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 4, 2019, 2:19 PM CDT for Robertson County, Tennessee. It was in force for 26 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: Aug 4, 2019, 2:19 PM CDT (19:19 UTC)
Expired: Aug 4, 2019, 2:45 PM CDT
In force: 26 min
Issued by: NWS Nashville, TN

County Robertson County, TN

The radar

The Nashville radar (KOHX), 27 km from the middle of the area, began a volume at 19:21 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, 7.3 hours before the alert went out and 38 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: 574 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 42 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 Aug 4, 1:05 PM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Aug 4, 1:05 PM CDT, 1 hour 14 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Aug 4, 5:00 AM CDT, 9 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CDT Sun Aug 4 2019

TNZ005>011-023>034-056>066-075-077>080-093>095-051000-
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-
500 AM CDT Sun Aug 4 2019

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Numerous showers and thunderstorms will develop across Middle
Tennessee today through this evening. Localized flooding will be
a concern with the slow moving thunderstorms. A few storms could
be strong with wind gusts over 40 mph.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter reports of any flooding or damaging winds would be
appreciated.

13

In the hours before

Special weather statement, Aug 4, 2:19 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Nashville TN
219 PM CDT Sun Aug 4 2019

TNZ007-008-027-041945-
Robertson TN-Davidson TN-Sumner TN-
219 PM CDT Sun Aug 4 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL DAVIDSON...WEST
CENTRAL SUMNER AND EASTERN ROBERTSON COUNTIES UNTIL 245 PM CDT...

At 219 PM CDT, Doppler radar was tracking a strong thunderstorm near
Cross Plains, or 7 miles northeast of Springfield, moving south at 20
mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Gallatin, Springfield, Hendersonville, Goodlettsville, White House,
Millersville, Greenbrier, Ridgetop, Cross Plains and Orlinda.

This includes Interstate 65 between mile markers 99 and 115.

LAT...LON 3635 8647 3634 8690 3665 8685 3665 8668
TIME...MOT...LOC 1919Z 342DEG 18KT 3658 8679

21

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 7:34 PM CDT	Special Weather Statement	OHX	Marshall	41 min
Aug 4, 2:49 PM CDT	Special Weather Statement	OHX	Williamson	26 min
Aug 4, 2:51 PM CDT	Areal Flood Advisory	OHX	Robertson, Sumner	114 min
Aug 4, 3:06 PM CDT	Areal Flood Advisory	OHX	Davidson, Rutherford, Williamson, Wilson	114 min
Aug 4, 3:12 PM CDT	Special Weather Statement	OHX	Williamson	33 min
Aug 4, 3:13 PM CDT	Flash Flood Warning	OHX	Davidson	3 hr
Aug 4, 3:53 PM CDT	Special Weather Statement	OHX	Williamson	37 min
Aug 4, 3:59 PM CDT	Special Weather Statement	OHX	Bedford	46 min
Aug 4, 4:43 PM CDT	Special Weather Statement	OHX	Bedford, Marshall, Maury	47 min
Aug 4, 5:10 PM CDT	Special Weather Statement	OHX	Giles, Lawrence, Lewis	50 min
Aug 4, 5:15 PM CDT	Areal Flood Advisory	OHX	Bedford, Marshall, Maury	3 hr

Nearby

Special Weather Statements in Tennessee, 2019 Every special weather statement in 2019

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.