Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 137, NWS Nashville, TN

December 29, 20194 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Dec 29, 2019, 8:34 PM CST for 4 counties in Tennessee. It was in force for 26 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: Dec 29, 2019, 8:34 PM CST (02:34 UTC)
Expired: Dec 29, 2019, 9:00 PM CST
In force: 26 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fentress County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN

The radar

The Nashville radar (KOHX), 123 km from the middle of the area, began a volume at 02:35 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.6 hours before the alert went out and 363 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -72 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Dec 29, 7:41 PM CST, 53 minutes earlier.

Area forecast discussion, Dec 29, 7:41 PM CST, 53 minutes before

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Hazardous weather outlook, Dec 29, 6:52 AM CST, 13 hours 42 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
652 AM CST Sun Dec 29 2019

TNZ005>011-023>034-056>066-075-077>080-093>095-301300-
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-
652 AM CST Sun Dec 29 2019

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Widespread showers and isolated storms will spread across Middle
Tennessee today. A few pockets of heavy rainfall could cause some
localized minor flooding issues and brief rises on creeks. In
addition, a few storms could become strong this afternoon and
evening with gusty winds as the main threat.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

11

In the hours before

Local storm report, Dec 29, 6:09 PM CST, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
609 PM CST SUN DEC 29 2019

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

0537 PM     FLOOD            CRIEVE HALL             36.07N  86.76W
12/29/2019                   DAVIDSON           TN   SOCIAL MEDIA

            SEVENMILE CREEK HAS BLACKMAN RD. SUBMERGED

0539 PM     FLOOD            BRENTWOOD               36.00N  86.79W
12/29/2019                   WILLIAMSON         TN   SOCIAL MEDIA

            LITTLE HARPETH RIVER AT THE BRENTWOOD COUNTRY CLUB IS
            UP OVER THE BANKS

0544 PM     FLOOD            SPRING HILL             35.74N  86.92W
12/29/2019                   MAURY              TN   EMERGENCY MNGR

            DUPLEX RD. IS CLOSED BETWEEN COMMONWEALTH AND PORT
            ROYAL RD. DUE TO HIGH WATER

0546 PM     FLOOD            LAWRENCEBURG            35.25N  87.34W
12/29/2019                   LAWRENCE           TN   EMERGENCY MNGR

            ALL LOW WATER CROSSINGS IN THE COUNTY ARE IMPASSABLE
            DUE TO HIGH WATER

0547 PM     FLOOD            FRANKLIN                35.93N  86.84W
12/29/2019                   WILLIAMSON         TN   SOCIAL MEDIA

            MALLORY LANE NEXT TO COOL SPRINGS MALL IS CLOSED DUE TO
            FLOODING

&&

EVENT NUMBER OHX1900622
EVENT NUMBER OHX1900623
EVENT NUMBER OHX1900624
EVENT NUMBER OHX1900625
EVENT NUMBER OHX1900626

ROSE

Special weather statement, Dec 29, 6:27 PM CST, 2 hours 7 minutes before

Special Weather Statement
National Weather Service Nashville TN
627 PM CST Sun Dec 29 2019

TNZ093>095-300100-
Lawrence TN-Wayne TN-Giles TN-
627 PM CST Sun Dec 29 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WAYNE...LAWRENCE AND
NORTHWESTERN GILES COUNTIES UNTIL 700 PM CST...

At 627 PM CST, Doppler radar was tracking a strong thunderstorm near
Loretto, or 17 miles southwest of Lawrenceburg, moving northeast at
55 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Lawrenceburg, Loretto, St. Joseph, Ethridge, Leoma, Westpoint and
Iron City.

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.

&&

LAT...LON 3500 8763 3503 8767 3544 8728 3543 8719
      3546 8713 3544 8708 3527 8703 3500 8733
TIME...MOT...LOC 0027Z 218DEG 49KT 3501 8748

10

Local storm report, Dec 29, 7:06 PM CST, 1 hour 28 minutes before

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Special weather statement, Dec 29, 7:52 PM CST, 42 minutes before

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Special weather statement, Dec 29, 8:19 PM CST, 15 minutes before

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Local storm report, Dec 29, 8:31 PM CST, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 29, 6:04 PM CST	River Flood Warning	OHX	Davidson	6 hr
Dec 29, 6:16 PM CST	Areal Flood Advisory	OHX	Cannon, Clay, DeKalb, Jackson, Macon, Rutherford and 4 more	3 hr
Dec 29, 6:27 PM CST	Flash Flood Warning	OHX	Giles, Lawrence	3 hr
Dec 29, 6:27 PM CST	Special Weather Statement	OHX	Lawrence	33 min
Dec 29, 6:50 PM CST	River Flood Warning	OHX	Davidson	9 hr
Dec 29, 6:52 PM CST	River Flood Warning	OHX	Davidson	10 hr
Dec 29, 6:57 PM CST	Areal Flood Advisory	OHX	Cheatham, Davidson, Robertson, Rutherford, Sumner, Williamson and 1 more	3 hr
Dec 29, 7:01 PM CST	River Flood Advisory	OHX	Davidson	4 hr
Dec 29, 7:01 PM CST	River Flood Advisory	OHX	Davidson	4 hr
Dec 29, 7:04 PM CST	Flash Flood Warning	OHX	Macon, Rutherford, Smith, Sumner, Trousdale, Wilson	3 hr
Dec 29, 7:52 PM CST	Special Weather Statement	OHX	Cannon, Coffee, Warren	38 min
Dec 29, 8:19 PM CST	Special Weather Statement	OHX	Overton, Putnam	41 min
Dec 29, 8:56 PM CST	Special Weather Statement	OHX	Pickett	34 min
Dec 29, 9:15 PM CST	Areal Flood Advisory	OHX	Coffee, DeKalb, Grundy, Van Buren, Warren, White	3 hr
Dec 29, 9:19 PM CST	Special Weather Statement	OHX	Van Buren, Warren	26 min
Dec 29, 10:32 PM CST	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	68 hr
Dec 29, 11:51 PM CST	River Flood Advisory	OHX	Cheatham	3 hr
Dec 30, 12:48 AM CST	River Flood Advisory	OHX	Giles	30 hr
Dec 30, 1:26 AM CST	River Flood Advisory	OHX	Davidson	61 hr
Dec 30, 2:50 AM CST	River Flood Advisory	OHX	Davidson, Williamson	26 hr
Dec 30, 6:48 AM CST	River Flood Advisory	OHX	Williamson	11 hr
Dec 30, 6:53 AM CST	River Flood Advisory	OHX	Lawrence	4 hr
Dec 30, 8:56 AM CST	River Flood Advisory	OHX	Davidson	46 hr
Dec 30, 9:29 AM CST	River Flood Advisory	OHX	Hickman	54 hr
Dec 30, 9:56 AM CST	River Flood Advisory	OHX	Montgomery, Robertson	11 hr
Dec 30, 10:22 AM CST	River Flood Advisory	OHX	Williamson	7 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.