Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

July 2, 2012Williamson County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 2, 2012, 12:46 PM CDT for Williamson County, Tennessee. It was in force for 44 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: Jul 2, 2012, 12:46 PM CDT (17:46 UTC)
Expired: Jul 2, 2012, 1:30 PM CDT
In force: 44 min
Issued by: NWS Nashville, TN

County Williamson County, TN

The radar

The Nashville radar (KOHX), 60 km from the middle of the area, began a volume at 17:46 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, 5.8 hours before the alert went out and 51 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: -162 J/kg
Mixed-layer LCL: 1702 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Jul 2, 8:17 AM CDT, 4 hours 29 minutes earlier.

Area forecast discussion, Jul 2, 8:17 AM CDT, 4 hours 29 minutes before

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</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.
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        Please try again in a few minutes.
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Hazardous weather outlook, Jul 2, 5:00 AM CDT, 7 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
500 AM CDT MON JUL 2 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-031030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
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 MON JUL 2 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

ROSE

In the hours before

Special weather statement, Jul 2, 12:46 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1246 PM CDT MON JUL 2 2012

TNZ057-059-060-021830-
HICKMAN-MAURY-WILLIAMSON-
1246 PM CDT MON JUL 2 2012

...SIGNIFICANT WEATHER ADVISORY FOR HICKMAN...MAURY AND WILLIAMSON
COUNTIES...

AT 1240 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 11 MILES EAST OF CENTERVILLE...MOVING NORTHEAST
AT 10 MPH.

HALF INCH SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3604 8706 3599 8704 3602 8699 3588 8677
      3570 8727 3587 8740 3597 8726 3596 8721
      3598 8719 3601 8719 3605 8714

BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 11:12 PM CDT	Special Weather Statement	OHX	Cumberland	48 min
Jul 2, 12:52 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	38 min
Jul 2, 1:23 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	26 min
Jul 2, 2:10 PM CDT	Special Weather Statement	OHX	Cheatham	35 min
Jul 2, 2:37 PM CDT	Special Weather Statement	OHX	Davidson, Robertson	23 min
Jul 2, 3:07 PM CDT	Special Weather Statement	OHX	Wilson	23 min
Jul 2, 3:10 PM CDT	Special Weather Statement	OHX	Robertson	35 min
Jul 2, 3:29 PM CDT	Special Weather Statement	OHX	Maury	61 min
Jul 2, 3:32 PM CDT	Special Weather Statement	OHX	Hickman	43 min
Jul 2, 4:37 PM CDT	Special Weather Statement	OHX	Marshall	53 min
Jul 2, 4:58 PM CDT	Special Weather Statement	OHX	Clay, Overton	47 min
Jul 2, 5:14 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	46 min
Jul 2, 5:36 PM CDT	Special Weather Statement	OHX	Cumberland, Jackson, Overton, Putnam, White	54 min
Jul 2, 5:42 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren, Warren	63 min
Jul 2, 6:39 PM CDT	Special Weather Statement	OHX	Cumberland, White	36 min

Nearby

Special Weather Statements in Tennessee, 2012 Every special weather statement in 2012

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.