Alert archive / Tennessee / Special Weather Statements in 2011

Special Weather Statement, NWS Nashville, TN

September 3, 2011Montgomery County, Tennessee

NWS Nashville, TN issued this special weather statement at Sep 3, 2011, 11:32 PM CDT for Montgomery County, Tennessee. It was in force for 28 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: Sep 3, 2011, 11:32 PM CDT (04:32 UTC)
Expired: Sep 4, 2011, 12:00 AM CDT
In force: 28 min
Issued by: NWS Nashville, TN

County Montgomery County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.5 hours before the alert went out and 77 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: 970 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2268 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Sep 3, 11:23 PM CDT, 9 minutes earlier.

Area forecast discussion, Sep 3, 11:23 PM CDT, 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1123 PM CDT SAT SEP 3 2011

.UPDATE...AREA OF SCATTERED THUNDERSTORMS, ASSOCIATED WITH AN
UPPER LEVEL SWEEP OF VORTICITY SWINGING THROUGH THE SPIRAL FLOW OF
T. S. LEE, CONTINUES TO WORK ITS WAY NORTHWESTWARD ACROSS NORTHERN
PARTS OF THE MID STATE. MOST OF THE ACTIVITY FOR THE NEXT 3 HOURS OR
SO WILL OCCUR WEST OF I-65 AND NORTH OF I-40. HAVE INCREASED POPS
TO 50% OVER AREAS TO BE MOST AFFECTED BY THESE SHOWERS AND STORMS.
MEANWHILE, HAVE DECREASED POPS TO THE EAST AND SOUTH SINCE THERE
DOESN'T APPEAR TO BE ANYTHING UPSTREAM TO CAUSE ANY MORE ACTIVITY
FOR THOSE AREAS. THIS ALSO BRINGS POP/WX GRIDS IN CLOSER AGREEMENT WITH
NEIGHBORING OFFICES.

HAVE ALSO MADE MINOR ADJUSTMENTS TO OVERNIGHT MIN TEMPS, DEW
POINTS, AND SOME OF THE DERIVED FIELDS.

WILL ISSUE ZFP FORECAST UPDATE SHORTLY.

&&

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

19

Hazardous weather outlook, Sep 3, 5:30 AM CDT, 18 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT SAT SEP 3 2011

TNZ005>011-022>034-056>066-075-077>080-093>095-041030-
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-
530 AM CDT SAT SEP 3 2011

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...SUNDAY THROUGH FRIDAY...

THE REMNANTS OF TROPICAL STORM LEE WILL SPREAD RAIN AND ISOLATED
THUNDERSTORMS UP INTO MIDDLE TENNESSEE BEGINNING LATER SUNDAY AND
CONTINUING INTO FRIDAY. THE RAINFALL WILL BE ESPECIALLY HEAVY
SUNDAY NIGHT THROUGH TUESDAY WHERE AMOUNTS OF 2 INCHES IN THE
NORTHWEST TO 7 INCHES ACROSS THE SOUTHEAST ARE POSSIBLE. THIS MAY
LEAD TO LOCALIZED FLOODING.

07

In the hours before

Local storm report, Sep 3, 10:08 PM CDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1008 PM CDT SAT SEP 03 2011

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

0912 PM     TSTM WND DMG     3 E GALLATIN            36.38N 86.40W
09/03/2011                   SUMNER             TN   EMERGENCY MNGR

            A FEW TREES DOWN AND POWER OUTAGES BETWEEN GALLATIN AND
            CASTALIAN SPRINGS

&&

ROSE

Special weather statement, Sep 3, 11:32 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1132 PM CDT SAT SEP 3 2011

TNZ006-040500-
MONTGOMERY-
1132 PM CDT SAT SEP 3 2011

...SIGNIFICANT WEATHER ADVISORY FOR MONTGOMERY COUNTY...

AT 1126 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR CLARKSVILLE...MOVING NORTHWEST AT 20 MPH.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3653 8716 3645 8736 3664 8750 3665 8721

ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 11:34 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery	26 min
Sep 4, 3:11 AM CDT	Flash Flood Watch	OHX	Bedford, Cannon, Coffee, Cumberland, DeKalb, Fentress and 11 more	49 hr
Sep 4, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	28 min
Sep 4, 3:02 PM CDT	Special Weather Statement	OHX	DeKalb	28 min
Sep 4, 4:38 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	37 min
Sep 4, 5:52 PM CDT	Flash Flood Warning	OHX	Houston, Montgomery, Stewart	3 hr
Sep 4, 6:38 PM CDT	Flash Flood Warning	OHX	Benton, Houston, Humphreys	4 hr

Nearby

Special Weather Statements in Tennessee, 2011 Every special weather statement in 2011

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.