Alert archive / Tennessee / Flash Flood Warnings in 2020

Flash Flood Warning 6, NWS Nashville, TN

February 5, 20206 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Feb 5, 2020, 9:56 PM CST for 6 counties in Tennessee. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 5, 2020, 9:56 PM CST (03:56 UTC)
Expired: Feb 6, 2020, 12:29 AM CST
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Giles County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 95 km from the middle of the area, began a volume at 03:55 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.

What was reported inside it

Time	Report	Where	Remark
Feb 5, 10:30 PM CST	FLASH FLOOD	Ardmore, TN	HIGHWAY 53 UNDERPASS FLOODED WITH CAR SUBMERGED
Feb 5, 10:30 PM CST	FLASH FLOOD	Waynesboro, TN	NUMEROUS ROADS FLOODED AND CLOSED ACROSS THE COUNTY INCLUDING ROANOKE RD...MAY BRANCH LOOP...KEETON HOLLOW RD...HILL PARKWAY...FANTAIL RD AT MIDDLE BUTLER CREEK RD...AND GREEN RIVER RD. OTHER FLOODED ROADS INCLUDED THOMPSON HOLLOW...LAST BUTLER...SHAWNETTE RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 34 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.9 hours before the alert went out and 90 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: 47 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

858 
WGUS54 KOHX 060356
FFWOHX
TNC055-099-101-117-119-181-060700-
/O.NEW.KOHX.FF.W.0006.200206T0356Z-200206T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
956 PM CST Wed Feb 5 2020

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southeastern Lewis County in Middle Tennessee...
  Wayne County in Middle Tennessee...
  Marshall County in Middle Tennessee...
  Lawrence County in Middle Tennessee...
  Maury County in Middle Tennessee...
  Giles County in Middle Tennessee...

* Until 100 AM CST.

* At 956 PM CST, Doppler radar indicated heavy rain falling across
  the warned area. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Columbia, Lewisburg, Lawrenceburg, Pulaski, Waynesboro, Spring
  Hill, Mount Pleasant, Loretto, Collinwood, Summertown, Chapel Hill,
  Ardmore, Cornersville, St. Joseph, Elkton, Minor Hill, Ethridge,
  Lynnville, Gordonsburg and Henryville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3501 8799 3524 8798 3571 8721 3572 8682
      3569 8664 3558 8666 3558 8663 3557 8665
      3546 8667 3537 8661 3533 8661 3531 8668
      3525 8675 3526 8683 3499 8684

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

1 follow-up statement

328 
WGUS74 KOHX 060629
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
1229 AM CST Thu Feb 6 2020

TNC055-099-101-117-119-181-060638-
/O.CAN.KOHX.FF.W.0006.000000T0000Z-200206T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lewis TN-Wayne TN-Marshall TN-Lawrence TN-Maury TN-Giles TN-
1229 AM CST Thu Feb 6 2020

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN LEWIS...WAYNE...
MARSHALL...LAWRENCE...MAURY AND GILES COUNTIES IS CANCELLED...

Heavy rain has ended across the area and flood waters are receding. 
However, stay alert if driving overnight as some low lying areas may 
still have flooding. Please continue to heed any remaining road 
closures.

LAT...LON 3501 8799 3524 8798 3571 8721 3572 8682
      3569 8664 3558 8666 3558 8663 3557 8665
      3546 8667 3537 8661 3533 8661 3531 8668
      3525 8675 3526 8683 3499 8684

$$

Shamburger

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Feb 5, 7:30 PM CST, 2 hours 26 minutes earlier.

Area forecast discussion, Feb 5, 7:30 PM CST, 2 hours 26 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
730 PM CST Wed Feb 5 2020

.UPDATE...
FOR MESOSCALE DISCUSSION...

&&

.MESOSCALE DISCUSSION...

Main line of storms extends from Auburntown to Manchester. Looking
at a comparison of 23z and 00z instability parameters along and in
advance of that aforementioned line, we see a decrease in
instability levels. Helicity values, and surface capes are slowly
decreasing. Showalter are slowly increasing. LAL shows a slow
decrease in frequency and coverage as well.

The main sfc low is now over central MS. The event looks as though
it will unfold toward more of a flood threat across our Plateau.
As the sfc low moves across the area later tonight, rainfall in
our east may intensify once again. The flood watch still looks
good at this point. As for the tor watch, we will continue to
slowly clear the counties from west to east across our far south.

&&

.PREV DISCUSSION.../ISSUED /
FXUS64 KOHX 052349
AFDOHX

Area Forecast Discussion
National Weather Service Nashville TN
549 PM CST Wed Feb 5 2020

UPDATE...
FOR MESOSCALE DISCUSSION...

&&

.AVIATION...
00Z TAF DISCUSSION.

Stationary frontal boundary currently draped from sw-ne across the
mid state. Latest sfc analysis places a surface low near Tupelo
MS. This feature will ride northeastward overnight and bring an
increasing threat of heavy rainfall. Additionally, thunderstorm
activity will also be possible along and to the southeast of the
sfc low track. Rainfall will be heavy at times across southern
middle TN and the central and southern Plateau. Therefore, the CSV
area could experience some tstm activity with the potential for
higher wind gusts.

Further northwest across the remaining taf sites, these areas will
be to the northwest of the low track. Thus, tstm activity is less
likely. However, some heavier rainfall will still be possible for
the BNA and MQY areas.

Otw, look for cloudiness and shower activity to persist through
the day on Thursday. Beyond the 24 hr taf period, look for the
potential for some snowfall on Thursday night.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      46  48  33  41  34 /  90  40  40  10  20
Clarksville    40  42  31  40  32 /  80  30  40  10  20
Crossville     57  60  31  37  28 / 100  80  60  20  20
Columbia       47  49  32  43  34 /  90  50  40  10  20
Lawrenceburg   50  50  33  43  34 /  90  70  40  10  20
Waverly        41  43  30  42  33 /  90  30  40  10  20

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Flood Watch through Thursday morning for Bedford-Cannon-Clay-
Coffee-Cumberland-Davidson-De Kalb-Fentress-Giles-Grundy-Jackson-
Lawrence-Lewis-Macon-Marshall-Maury-Overton-Pickett-Putnam-
Robertson-Rutherford-Smith-Sumner-Trousdale-Van Buren-Warren-
Wayne-White-Williamson-Wilson.

&&

DISCUSSION......21
AVIATION........21

Hazardous weather outlook, Feb 5, 10:54 AM CST, 11 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
1054 AM CST Wed Feb 5 2020

TNZ005>011-023>034-056>066-075-077>080-093>095-061700-
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-
1054 AM CST Wed Feb 5 2020

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...This Afternoon and Tonight.

A Flood Watch is in effect for portions of Middle Tennessee
through Noon Thursday. Moderate to heavy rain will continue this
afternoon into tomorrow morning, with an additional 1 to 3 inches
of rain expected. Localized flooding of roads, low lying areas,
and rivers and streams is possible.

Strong to severe storms will be possible between 2 and 9 pm CST
for areas of Middle TN south of I-40. A few storms may contain
winds of 50-60 mph.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Light rain may mix with light snow Thursday night into early
Friday morning. A dusting of snow is possible on elevated surfaces
in the Upper Cumberland and on the Cumberland Plateau, but no
accumulation is expected elsewhere.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested for this afternoon and evening
across southern and eastern Middle Tennessee due to the potential
for flooding and a few severe storms.

27

In the hours before

Local storm report, Feb 5, 8:29 PM CST, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
829 PM CST WED FEB 05 2020

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

0630 PM     TSTM WND DMG     CORNERSVILLE            35.36N  86.84W
02/05/2020                   MARSHALL           TN   EMERGENCY MNGR

            A HOME AND SEVERAL CARPORTS WERE DAMAGED IN THE AREA OF
            FRONT VIEW ST. AND VALLEY VIEW DRIVE. TIME WAS ESTIMATED
            BY RADAR.

&&

EVENT NUMBER OHX2000066

SH

Local storm report, Feb 5, 8:31 PM CST, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
831 PM CST WED FEB 05 2020

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

0800 PM     FLASH FLOOD      LEWISBURG               35.45N  86.79W
02/05/2020                   MARSHALL           TN   EMERGENCY MNGR

            ROADS WERE FLOODED AND SEVERAL WATER RESCUES TOOK PLACE
            ACROSS MARSHALL COUNTY.

&&

EVENT NUMBER OHX2000067

SH

Local storm report, Feb 5, 8:40 PM CST, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
840 PM CST WED FEB 05 2020

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

0839 PM     FLASH FLOOD      GAINESBORO              36.36N  85.65W
02/05/2020                   JACKSON            TN   DEPT OF HIGHWAYS

            SCATTERED ROAD CLOSURES ACROSS THE COUNTY.

&&

EVENT NUMBER OHX2000068

21

Local storm report, Feb 5, 8:53 PM CST, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
853 PM CST WED FEB 05 2020

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

0651 PM     TSTM WND GST     3 N SHELBYVILLE         35.53N  86.45W
02/05/2020  M58 MPH          BEDFORD            TN   ASOS

            58 MPH WIND GUST REPORTED BY SHELBYVILLE ASOS

&&

EVENT NUMBER OHX2000069

JB

Local storm report, Feb 5, 9:33 PM CST, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
933 PM CST WED FEB 05 2020

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

0605 PM     TSTM WND DMG     LORETTO                 35.08N  87.44W
02/05/2020                   LAWRENCE           TN   EMERGENCY MNGR

            TREE ACROSS MAIN ST

&&

EVENT NUMBER OHX2000070

21

Local storm report, Feb 5, 9:34 PM CST, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
934 PM CST WED FEB 05 2020

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

0600 PM     TSTM WND DMG     2 E LAWRENCEBURG        35.25N  87.30W
02/05/2020                   LAWRENCE           TN   EMERGENCY MNGR

            HOUSE DAMAGED AT 4345 GIMLET RD.

&&

EVENT NUMBER OHX2000071

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 5, 6:07 PM CST	Areal Flood Advisory	OHX	Bedford, Davidson, Marshall, Maury, Rutherford, Williamson and 1 more	6 hr
Feb 5, 6:26 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall	34 min
Feb 5, 6:32 PM CST	Flash Flood Warning	OHX	Cumberland, DeKalb, Fentress, Jackson, Overton, Pickett and 2 more	6 hr
Feb 5, 6:34 PM CST	Tornado Warning	OHX	Bedford, Marshall	26 min
Feb 5, 6:43 PM CST	Special Weather Statement	OHX	Bedford, Cannon, Rutherford	47 min
Feb 5, 6:48 PM CST	Tornado Warning	OHX	Bedford, Coffee, Rutherford	15 min
Feb 5, 6:49 PM CST	Areal Flood Advisory	OHX	Bedford, Cannon, Coffee, DeKalb, Grundy, Rutherford and 4 more	3 hr
Feb 5, 6:59 PM CST	River Flood Advisory	OHX	Davidson	19 days
Feb 5, 7:01 PM CST	Special Weather Statement	OHX	Coffee, Grundy, Warren	44 min
Feb 5, 7:04 PM CST	Areal Flood Advisory	OHX	Clay, DeKalb, Jackson, Overton, Pickett, Putnam and 1 more	116 min
Feb 5, 7:20 PM CST	Special Weather Statement	OHX	Cannon, DeKalb, Van Buren, Warren, White	40 min
Feb 5, 7:32 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Putnam, Van Buren, Warren, White	43 min
Feb 5, 7:34 PM CST	Flash Flood Warning	OHX	Cumberland, DeKalb, Van Buren, Warren, White	4 hr
Feb 5, 7:37 PM CST	Flash Flood Warning	OHX	Clay, DeKalb, Jackson, Macon, Overton, Pickett and 2 more	4 hr
Feb 5, 8:01 PM CST	Flash Flood Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Warren, Wilson	3 hr
Feb 5, 8:11 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	34 min
Feb 5, 8:15 PM CST	Areal Flood Advisory	OHX	Giles, Lawrence, Lewis, Marshall, Maury, Perry and 1 more	3 hr
Feb 5, 8:25 PM CST	River Flood Advisory	OHX	Grundy	25 hr
Feb 5, 8:36 PM CST	River Flood Advisory	OHX	Davidson	4 hr
Feb 5, 9:45 PM CST	Areal Flood Advisory	OHX	Bedford, Cannon, Coffee, Grundy, Rutherford, Van Buren and 1 more	3 hr
Feb 5, 9:59 PM CST	River Flood Advisory	OHX	Bedford	13 hr
Feb 5, 11:34 PM CST	River Flood Advisory	OHX	Lawrence	5 hr
Feb 6, 1:25 AM CST	Areal Flood Advisory	OHX	Bedford, Cannon, Coffee, Giles, Grundy, Marshall and 1 more	3 hr
Feb 6, 1:29 AM CST	Areal Flood Advisory	OHX	Cannon, Cumberland, DeKalb, Fentress, Overton, Pickett and 4 more	3 hr
Feb 6, 1:39 AM CST	River Flood Advisory	OHX	Giles	13 hr
Feb 6, 1:51 AM CST	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	58 hr
Feb 6, 2:44 AM CST	River Flood Advisory	OHX	Giles	13 hr
Feb 6, 4:26 AM CST	Areal Flood Advisory	OHX	Bedford, Coffee, Giles, Grundy, Lawrence, Marshall and 2 more	9 hr
Feb 6, 4:30 AM CST	Areal Flood Advisory	OHX	Cannon, Cumberland, DeKalb, Fentress, Overton, Pickett and 5 more	9 hr
Feb 6, 5:00 AM CST	River Flood Warning	OHX	Lawrence	10 hr
Feb 6, 5:45 AM CST	River Flood Advisory	OHX	Maury	8 hr
Feb 6, 6:01 AM CST	River Flood Advisory	OHX	Decatur, Hardin, Perry, Wayne	10 hr
Feb 6, 7:15 AM CST	River Flood Advisory	OHX	Hickman	7 hr
Feb 6, 8:53 AM CST	River Flood Advisory	OHX	Davidson	15 days
Feb 6, 8:56 AM CST	River Flood Advisory	OHX	Bedford, Marshall	19 hr
Feb 6, 10:31 AM CST	River Flood Advisory	OHX	Williamson	18 hr
Feb 6, 10:37 AM CST	River Flood Advisory	OHX	Perry, Wayne	18 hr
Feb 6, 10:54 AM CST	River Flood Advisory	OHX	Marshall	12 hr
Feb 6, 11:24 AM CST	River Flood Advisory	OHX	Davidson, Williamson	28 hr
Feb 6, 1:28 PM CST	River Flood Advisory	OHX	Williamson	22 hr
Feb 6, 1:29 PM CST	Areal Flood Advisory	OHX	Cannon, Cumberland, DeKalb, Fentress, Overton, Pickett and 5 more	3 hr
Feb 6, 1:38 PM CST	River Flood Warning	OHX	Maury	42 hr
Feb 6, 1:43 PM CST	River Flood Warning	OHX	Hickman	3 days
Feb 6, 2:17 PM CST	River Flood Warning	OHX	Giles	10 hr
Feb 6, 2:25 PM CST	Winter Weather Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 24 more	22 hr
Feb 6, 3:01 PM CST	River Flood Advisory	OHX	Lawrence	6 hr
Feb 6, 3:35 PM CST	River Flood Warning	OHX	Giles	44 hr
Feb 6, 3:45 PM CST	River Flood Advisory	OHX	Davidson	52 hr
Feb 6, 3:49 PM CST	River Flood Warning	OHX	Perry	40 hr
Feb 6, 3:58 PM CST	River Flood Warning	OHX	Decatur, Hardin, Perry, Wayne	20 days

Nearby

Flash Flood Warnings in Tennessee, 2020 Every flash flood warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.