Alert archive / Tennessee / Special Weather Statements in 2018

Special Weather Statement, NWS Nashville, TN

December 1, 2018DeKalb County, Putnam County, Tennessee

NWS Nashville, TN issued this special weather statement at Dec 1, 2018, 7:13 PM CST for DeKalb County, Putnam County, Tennessee. It was in force for 32 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
Dec 1, 2018, 7:13 PM CST (01:13 UTC)
Expired
Dec 1, 2018, 7:45 PM CST
In force
32 min
Issued by
NWS Nashville, TN

Counties DeKalb County, TN, Putnam County, TN

The radar

The Nashville radar (KOHX), 82 km from the middle of the area, began a volume at 01:16 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, 1.2 hours before the alert went out and 83 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 2018-12-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 180 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 2018-12-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 451 square meters per square second.1939587897117Sfc1 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
180 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
451 m²/s²
0-3 km storm-relative helicity
452 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 Dec 1, 5:50 PM CST, 1 hour 23 minutes earlier.

Area forecast discussion, Dec 1, 5:50 PM CST, 1 hour 23 minutes before
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Hazardous weather outlook, Dec 1, 5:13 AM CST, 14 hours before
Hazardous Weather Outlook
National Weather Service Nashville TN
513 AM CST Sat Dec 1 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-021115-
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-
513 AM CST Sat Dec 1 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight.

A few strong storms will be possible for areas along and west of
I-65 from noon to 6 pm today. The main concern is strong wind
gusts with any of these storms.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today.

27

In the hours before

Special weather statement, Dec 1, 5:28 PM CST, 1 hour 45 minutes before
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Special weather statement, Dec 1, 7:13 PM CST, 0 minutes before
Special Weather Statement
National Weather Service Nashville TN
713 PM CST Sat Dec 1 2018

TNZ030>032-064>066-020145-
Putnam TN-Cumberland TN-Jackson TN-De Kalb TN-White TN-Smith TN-
713 PM CST Sat Dec 1 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CUMBERLAND...
SOUTHEASTERN SMITH...NORTHEASTERN DE KALB...SOUTHEASTERN JACKSON...
NORTHWESTERN WHITE AND PUTNAM COUNTIES UNTIL 745 PM CST...

At 712 PM CST, Doppler radar was tracking a strong thunderstorm near
Smithville, moving northeast at 45 mph.

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

Locations impacted include...
Cookeville, Smithville, Algood, Baxter, Center Hill Lake, Hamptons
Crossroads, Bakers Crossroads, Burgess Falls State Park, Edgar Evans
State Park and Cummins Falls State Park.

This includes Interstate 40 between mile markers 265 and 298.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3590 8576 3604 8590 3636 8572 3609 8524
TIME...MOT...LOC 0112Z 228DEG 50KT 3603 8576

07

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 1, 7:25 PM CSTSpecial Weather StatementOHXClay, Overton, Pickett50 min
Dec 1, 9:03 PM CSTSpecial Weather StatementOHXRutherford42 min
Dec 1, 9:56 PM CSTSpecial Weather StatementOHXCannon, Coffee, Warren34 min
Dec 1, 10:33 PM CSTSpecial Weather StatementOHXFentress, Overton, Pickett, Putnam, White57 min
Dec 1, 10:55 PM CSTSpecial Weather StatementOHXGrundy, Van Buren35 min
Dec 1, 11:15 PM CSTSevere Thunderstorm WarningOHXVan Buren30 min

Nearby

Special Weather Statements in Tennessee, 2018Every special weather statement in 2018

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.