Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Nashville, TN

February 24, 2017Bedford County, Marshall County, Tennessee

NWS Nashville, TN issued this special weather statement at Feb 24, 2017, 8:49 PM CST for Bedford County, Marshall County, Tennessee. It was in force for 41 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
Feb 24, 2017, 8:49 PM CST (02:49 UTC)
Expired
Feb 24, 2017, 9:30 PM CST
In force
41 min
Issued by
NWS Nashville, TN

Counties Bedford County, TN, Marshall County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.8 hours before the alert went out and 65 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2017-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 391 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2017-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
391 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1931 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.5

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 Feb 24, 5:33 PM CST, 3 hours 16 minutes earlier.

Area forecast discussion, Feb 24, 5:33 PM CST, 3 hours 16 minutes before
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Hazardous weather outlook, Feb 24, 5:00 AM CST, 15 hours 49 minutes before
Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CST Fri Feb 24 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-251100-
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 CST Fri Feb 24 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

There is a slight risk of severe thunderstorms for locations
generally east of I-24 this evening. There is a marginal risk
of severe thunderstorms for generally the rest of Middle
Tennessee this evening. Some strong to severe thunderstorms
will be possible, with strong to damaging winds and large hail
the main concerns. A brief tornado or two and brief heavy
rainfall leading to localized flooding can not totally be ruled
out, but the overall threat is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will most likely be needed this evening.

Spotter Thunderstorm Reporting Criteria...
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 inch
Winds > 50 mph (Measured)
Structural Damage
Trees or Power Lines Down

In the hours before

Special weather statement, Feb 24, 7:46 PM CST, 1 hour 3 minutes before
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Special weather statement, Feb 24, 8:13 PM CST, 36 minutes before
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Special weather statement, Feb 24, 8:36 PM CST, 13 minutes before
Special Weather Statement
National Weather Service Nashville TN
836 PM CST FRI FEB 24 2017

TNZ059-061-062-075-250315-
Rutherford TN-Williamson TN-Bedford TN-Marshall TN-
836 PM CST FRI FEB 24 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARSHALL...
RUTHERFORD...SOUTHEASTERN WILLIAMSON AND NORTHWESTERN BEDFORD
COUNTIES UNTIL 915 PM CST...

At 836 PM CST, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Spring Hill, or 12 miles north of Lewisburg,
moving northeast at 50 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Murfreesboro, Smyrna, La Vergne, Nolensville, Chapel Hill,
Eagleville, Rover, Christiana, Rockvale, Unionville and Triune.

LAT...LON 3550 8678 3559 8683 3560 8682 3569 8681
      3570 8681 3569 8680 3571 8678 3574 8687
      3597 8662 3597 8661 3599 8661 3606 8653
      3580 8622
TIME...MOT...LOC 0236Z 228DEG 46KT 3563 8678

Barnwell
Special weather statement, Feb 24, 8:42 PM CST, 7 minutes before
Special Weather Statement
National Weather Service Nashville TN
842 PM CST FRI FEB 24 2017

TNZ061-094-095-250330-
Lawrence TN-Giles TN-Marshall TN-
842 PM CST FRI FEB 24 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MARSHALL...
SOUTHEASTERN LAWRENCE AND GILES COUNTIES UNTIL 930 PM CST...

At 841 PM CST, Doppler radar was tracking a strong thunderstorm 9
miles east of Lexington, or 17 miles northwest of Athens, moving
northeast at 55 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Pulaski, Cornersville, Elkton, Minor Hill, Lynnville, Goodspring,
Frankewing and Prospect.

LAT...LON 3500 8732 3501 8733 3543 8704 3543 8703
      3542 8702 3541 8699 3542 8698 3541 8696
      3542 8696 3527 8673 3525 8675 3526 8683
      3509 8683 3499 8698
TIME...MOT...LOC 0241Z 221DEG 49KT 3498 8720

Barnwell
Special weather statement, Feb 24, 8:49 PM CST, 0 minutes before
Special Weather Statement
National Weather Service Nashville TN
849 PM CST FRI FEB 24 2017

TNZ061-062-075-077-250330-
Rutherford TN-Coffee TN-Bedford TN-Marshall TN-
849 PM CST FRI FEB 24 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MARSHALL...
SOUTHEASTERN RUTHERFORD...NORTHWESTERN COFFEE AND BEDFORD COUNTIES
UNTIL 930 PM CST...

At 849 PM CST, Doppler radar was tracking a strong thunderstorm near
Lewisburg, moving northeast at 50 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Murfreesboro, Shelbyville, Lewisburg, Wartrace, Bell Buckle,
Christiana, Belfast, Deason, Beechgrove, Farmington, Unionville and
Fosterville.

LAT...LON 3547 8685 3584 8631 3574 8620 3571 8621
      3570 8619 3569 8619 3566 8615 3566 8611
      3560 8605 3537 8657 3537 8660 3535 8660
      3531 8670
TIME...MOT...LOC 0249Z 232DEG 45KT 3542 8669

Barnwell

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 7:46 PM CSTSpecial Weather StatementOHXMaury, Williamson44 min
Feb 24, 8:13 PM CSTSpecial Weather StatementOHXGiles47 min
Feb 24, 8:36 PM CSTSpecial Weather StatementOHXRutherford39 min
Feb 24, 8:42 PM CSTSpecial Weather StatementOHXGiles48 min
Feb 24, 9:10 PM CSTSpecial Weather StatementOHXCannon, DeKalb50 min
Feb 24, 9:26 PM CSTSpecial Weather StatementOHXCannon, Warren49 min
Feb 24, 9:31 PM CSTSpecial Weather StatementOHXClay, Pickett44 min
Feb 24, 9:50 PM CSTSevere Thunderstorm WarningOHXClay, Fentress, Overton, Pickett25 min
Feb 24, 9:55 PM CSTSpecial Weather StatementOHXPutnam50 min
Feb 24, 10:04 PM CSTSevere Thunderstorm WarningOHXJackson, Overton, Putnam, White26 min
Feb 24, 10:14 PM CSTSpecial Weather StatementOHXCoffee, Warren46 min
Feb 24, 10:29 PM CSTSevere Thunderstorm WarningOHXFentress, Overton, Putnam31 min
Feb 24, 10:47 PM CSTSpecial Weather StatementOHXGrundy43 min
Feb 24, 11:00 PM CSTSpecial Weather StatementOHXFentress, Pickett45 min
Feb 24, 11:33 PM CSTSpecial Weather StatementOHXGrundy, Van Buren27 min

Nearby

Special Weather Statements in Tennessee, 2017Every special weather statement in 2017

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.