Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 405, NWS Nashville, TN

September 27, 2006Sumner County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Sep 27, 2006, 10:40 PM CDT for Sumner County, Tennessee. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 27, 2006, 10:40 PM CDT (03:40 UTC)
Expired: Sep 27, 2006, 11:15 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Sumner County, TN

The radar

The Nashville radar (KOHX), 26 km from the middle of the area, began a volume at 03:41 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 00:00Z, 3.7 hours before the alert went out and 40 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: 228 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1973 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 27, 8:26 PM CDT, 2 hours 14 minutes earlier.

Area forecast discussion, Sep 27, 8:26 PM CDT, 2 hours 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
826 PM CDT WED SEP 27 2006

.DISCUSSION...
AROUND 01Z THE COLD FRONT WAS LOCATED NEAR A LINE FROM KSDF...KOWB TO
JUST NORTH OF KCGI. ALONG AND AHEAD OF THE FRONT THUNDERSTORMS SOME
SEVERE WERE OCCURRING. SPC LATEST MESOSCALE DISCUSSION STATES
STRONG/LOCALLY-SEVERE STORMS CONTINUE MOVING EASTWARD...BUT
DIMINISHING SEVERE THREAT IS FORECAST OVER THE NEXT FEW HOURS.
PREVIOUS FORECAST PACKAGE IS ON TARGET AS THE NORTHWESTERN COUNTIES
OF THE MID STATE HAVE SOME STORMS MAY BE SEVERE. THE FRONT WILL
ENTER THE NORTHWEST CORNER OF THE MID STATE AROUND 06Z WITH
PRECIPITATION AHEAD OF THE FRONT MOVING INTO THE MID STATE WITHIN THE
NEXT FEW HOURS. WILL UPDATE THE ZONES FOR THE EVENING WORDING BUT NO
OTHER CHANGES NEEDED.

PREVIOUS DISCUSSION...
GUSTY SOUTHWEST FLOW AND WARM AFTERNOON TEMPERATURES INC SFC
CAPES IN OH VLY FM KOWB TO KPOF THIS AFTERNOON...AHEAD OF QUICK-
MOVING SFC FRONT. SFC DEWPOINTS REMAINED IN THE MID 50S IN MID TN.

12Z MODELS SHOW H5 DIVERGENCE AND H7 OMEGA INC ACR W MID TN THIS
EVENING...AND COVERAGE OF SHOWERS AND TSTORMS SHOULD INCREASE IN
THIS AREA. 12Z GFS AND 18Z NAM12 SHIFT H8 WIND MAX FM C AR (WHERE
CONVECTION DEVELOPED) TO SOUTH OF CWA AROUND/AFTER 06Z...ALONG
QUICKER MOVING (AND PREFERRED) GFS SFC FRONT.

SFC FRONT IS EXPECTED TO MOVE THROUGH MID TN THU MORNING. POST
FRONT SHOWERS WILL BE LIKELY...WITH COLDER H8 AIR AND CLOUDS KEEPING
HIGH TEMPS IN CHECK. CLOUDS AND SHOWER CHANCE WILL LINGER INTO THU
NIGHT IN THE EAST. SFC HIGH PRES AND DRIER AIR WILL WILL MOVE IN FRI.

A SLIGHT CHC OF RAIN CONTINUES ON SAT NIGHT...ASSOCIATED WITH A
CLIPPER SYSTEM. SFC REFLECTION INDICATES POSSIBLE FROPA...AND
WILL COOL DOWN EXTENDED GUIDANCE TEMPERATURES THEREAFTER.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE    60  68  46  67 /  80  60  20   0
CLARKSVILLE  57  68  42  67 /  90  50  10   0
CROSSVILLE   56  65  45  62 /  50  90  30  10

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

31

Hazardous weather outlook, Sep 27, 5:30 AM CDT, 17 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT WED SEP 27 2006

TNZ005>011-022>034-056>066-075-077>080-093>095-281030-
BEDFORD-BENTON-CANNON-CHEATHAM-CLAY-COFFEE-CUMBERLAND-DAVIDSON-
DEKALB-DICKSON-FENTRESS-GILES-GRUNDY-HICKMAN-HOUSTON-HUMPHREYS-
JACKSON-LAWRENCE-LEWIS-MACON-MARSHALL-MAURY-MONTGOMERY-OVERTON-PERRY-
PICKETT-PUTNAM-ROBERTSON-RUTHERFORD-SMITH-STEWART-SUMNER-TROUSDALE-
VAN BUREN-WARREN-WAYNE-WHITE-WILLIAMSON-WILSON-
530 AM CDT WED SEP 27 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A STRONG COLD FRONT WILL APPROACH THE MID STATE OVERNIGHT, AND WILL
SPREAD SHOWERS AND THUNDERSTORMS ACROSS THE AREA. SOME OF THESE
STORMS MAY BE SEVERE AROUND THE CLARKSVILLE, WAVERLY, AND DOVER
AREAS, WITH LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS POSING THE
GREATEST THREATS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT

SPOTTER ACTIVATION MAY BE NEEDED, ESPECIALLY AROUND THE CLARKSVILLE,
WAVERLY, AND DOVER AREAS OVERNIGHT.

ROSE

In the hours before

Local storm report, Sep 27, 10:26 PM CDT, 14 minutes before

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Local storm report, Sep 27, 10:30 PM CDT, 10 minutes before

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Local storm report, Sep 27, 10:33 PM CDT, 7 minutes before

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  <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 27, 9:42 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	33 min
Sep 27, 10:16 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	44 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2006 Every severe thunderstorm warning in 2006

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.