Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

July 15, 2012Grundy County, Tennessee

NWS Nashville, TN issued this special weather statement at Jul 15, 2012, 6:12 PM CDT for Grundy County, Tennessee. It was in force for 48 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 15, 2012, 6:12 PM CDT (23:12 UTC)
Expired: Jul 15, 2012, 7:00 PM CDT
In force: 48 min
Issued by: NWS Nashville, TN

County Grundy County, TN

The radar

The Northeast Alabama radar (KHTX), 63 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 123 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: 696 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 15, 3:37 PM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Jul 15, 3:37 PM CDT, 2 hours 35 minutes before

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</head>
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      <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.
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Hazardous weather outlook, Jul 15, 5:04 AM CDT, 13 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
504 AM CDT SUN JUL 15 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-161015-
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-
504 AM CDT SUN JUL 15 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE ONCE AGAIN POSSIBLE TODAY.
LOCALLY HEAVY RAINFALL IS POSSIBLE. WITH THE EXTENSIVE RAINFALL
ACROSS MIDDLE TENNESSEE OVER THE LAST WEEK...SATURATED SOILS WILL
CREATE LOCALIZED FLOODING CONCERNS WITH EVEN MODERATE SHOWERS...ESPECIALLY
NEAR LOW LYING AREAS AND SMALL STREAMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SHOWERS AND THUNDERSTORMS ARE POSSIBLE IN THE AFTERNOON HOURS WITH
LOCALLY HEAVY RAIN POSSIBLE. LOCALIZED FLOODING WILL BE POSSIBLE.

HEAT INDEXES WILL REACH THE TRIPLE DIGITS DUE TO ELEVATED DEWPOINT
VALUES AND AFTERNOON TEMPERATURES RISING INTO THE NINETIES BY MID WEEK.

TB12

In the hours before

Local storm report, Jul 15, 4:40 PM CDT, 1 hour 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
440 PM CDT SUN JUL 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     FLASH FLOOD      5 S LAKEWOOD            36.16N 86.65W
07/14/2012                   DAVIDSON           TN   PUBLIC

            WATER OVER ROADWAY IN SEVERAL LOCATIONS AROUND MCCAMPBELL
            AVE AND STEWARTS FERRY PIKE

&&

SHAMBURGER

Local storm report, Jul 15, 4:41 PM CDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
441 PM CDT SUN JUL 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     FLASH FLOOD      10 W LEBANON            36.21N 86.50W
07/14/2012                   WILSON             TN   TRAINED SPOTTER

            FLOODING REPORTED IN THE GREEN HILL/OLD HICKORY AREA.

1200 PM     FLASH FLOOD      5 S LAKEWOOD            36.16N 86.65W
07/14/2012                   DAVIDSON           TN   PUBLIC

            WATER OVER ROADWAY IN SEVERAL LOCATIONS AROUND MCCAMPBELL
            AVE AND STEWARTS FERRY PIKE

1226 PM     FLASH FLOOD      10 E NASHVILLE          36.17N 86.61W
07/14/2012                   DAVIDSON           TN   BROADCAST MEDIA

            WATER OVER THE ROADWAY ON TULIP GROVE ROAD AND CENTRAL
            PIKE.

&&

SHAMBURGER

Special weather statement, Jul 15, 6:12 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
612 PM CDT SUN JUL 15 2012

TNZ079-160000-
GRUNDY-
612 PM CDT SUN JUL 15 2012

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN GRUNDY COUNTY...

AT 608 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR GRUETLI-LAAGER...OR 14 MILES WEST OF
DUNLAP...MOVING NORTHEAST AT 10 MPH.

PEA SIZE HAIL...WINDS AROUND 40 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING AND HEAVY RAINFALL ARE EXPECTED WITH THIS STORM.

LAT...LON 3533 8582 3553 8560 3549 8553 3543 8553
      3541 8549 3538 8549 3531 8556 3530 8566
      3528 8570 3524 8569 3524 8570

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 6:29 PM CDT	Areal Flood Advisory	OHX	Grundy	2 hr

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.