Alert archive / Tennessee / Areal Flood Advisories in 2021

Areal Flood Advisory 29, NWS Nashville, TN

March 31, 2021Bedford County, Coffee County, Tennessee

NWS Nashville, TN issued this areal flood advisory at Mar 31, 2021, 4:19 AM CDT for Bedford County, Coffee County, Tennessee. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Mar 31, 2021, 4:19 AM CDT (09:19 UTC)
Expired: Mar 31, 2021, 9:00 AM CDT
In force: 5 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Coffee County, TN

The radar

The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 09:20 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, 9.3 hours before the alert went out and 76 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: 2196 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 185 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 areal flood advisory 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 areal flood advisory went out at Mar 31, 3:00 AM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Mar 31, 3:00 AM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, Mar 30, 5:06 AM CDT, 23 hours 13 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
506 AM CDT Tue Mar 30 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-311015-
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-
506 AM CDT Tue Mar 30 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

Flooding along many rivers and streams is ongoing as a result of
weekend rainfall event.

Some strong to severe thunderstorms may be possible for locations
approaching central and western portions of Tennessee River Valley
Region tonight. Main concern will be damaging winds.

A flash flood watch is in effect for all of middle Tennessee starting
this evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Several river and stream levels will remain elevated through at
least midweek, some continuing through Sunday...with some warnings
and advisories continuing also.

Some strong to severe thunderstorms may be possible for locations
approaching central and western portions of Tennessee River Valley
Region through early Wednesday morning. Main concern will be
damaging winds.

A flash flood watch is in effect for all of Middle Tennessee through
Wednesday evening. With already significant saturated ground
conditions, 1 to 2 inches...with locally higher amounts around 3
inches...of rainfall possible. Rainfall will cause excess runoff and
localized flash flooding, including adding additional water level
rises on already elevated area rivers and creeks.

It is expected to turn colder late week with several frosty nights.
A widespread freeze is expected Thursday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed. Please relay any
information about observed severe weather to the NWS while following
all local, state, and CDC guidelines.

12

In the hours before

Special weather statement, Mar 30, 11:58 PM CDT, 4 hours 21 minutes before

Special Weather Statement
National Weather Service Nashville TN
1158 PM CDT Tue Mar 30 2021

TNZ057>060-310545-
Hickman TN-Williamson TN-Lewis TN-Maury TN-
1158 PM CDT Tue Mar 30 2021

...SIGNIFICANT WEATHER ADVISORY FOR LEWIS...MAURY...SOUTHWESTERN
WILLIAMSON AND SOUTHEASTERN HICKMAN COUNTIES UNTIL 1245 AM CDT...

At 1157 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Centerville to near Hohenwald. Movement
was east at 40 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Columbia, Hohenwald, Centerville, Spring Hill, Mount Pleasant,
Thompson's Station, Gordonsburg, Kimmins, Culleoka, Primm Springs,
I-65 East Of Columbia, Santa Fe, Hampshire and Williamsport.

This includes the following highways...
 Interstate 65 between mile markers 39 and 61.
 Interstate 840 between mile markers 16 and 35.

LAT...LON 3586 8742 3586 8674 3541 8696 3541 8701
      3543 8703 3546 8712 3544 8716 3544 8723
      3543 8723 3546 8733 3546 8745 3542 8745
      3541 8751 3540 8752 3540 8757 3542 8761
      3544 8761 3544 8765 3547 8765 3547 8768
TIME...MOT...LOC 0457Z 252DEG 33KT 3583 8737 3550 8761

Shamburger

Special weather statement, Mar 30, 11:59 PM CDT, 4 hours 20 minutes before

Special Weather Statement
National Weather Service Nashville TN
1159 PM CDT Tue Mar 30 2021

TNZ093>095-310545-
Lawrence TN-Wayne TN-Giles TN-
1159 PM CDT Tue Mar 30 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WAYNE...LAWRENCE AND
NORTHWESTERN GILES COUNTIES UNTIL 1245 AM CDT...

At 1159 PM CDT, Doppler radar was tracking strong thunderstorms
along a line extending from Hohenwald to Collinwood. Movement was
east at 40 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Lawrenceburg, Pulaski, Collinwood, Summertown, Ethridge, Lynnville,
Henryville, Goodspring and Leoma.

LAT...LON 3514 8778 3547 8768 3547 8765 3544 8765
      3544 8761 3542 8761 3540 8757 3540 8752
      3541 8751 3542 8745 3546 8745 3546 8733
      3543 8723 3544 8723 3544 8716 3546 8712
      3543 8703 3541 8701 3541 8696 3514 8699
TIME...MOT...LOC 0459Z 263DEG 33KT 3543 8755 3518 8761

Shamburger

Special weather statement, Mar 31, 12:39 AM CDT, 3 hours 40 minutes before

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Local storm report, Mar 31, 3:12 AM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
312 AM CDT WED MAR 31 2021

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

0311 AM     FLASH FLOOD      ETHRIDGE                35.32N  87.30W
03/31/2021                   LAWRENCE           TN   EMERGENCY MNGR

            WYNN ROAD IS FLOODED AND CLOSED

&&

EVENT NUMBER OHX2100420

SHAMBURGER

Local storm report, Mar 31, 3:54 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
354 AM CDT WED MAR 31 2021

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

0350 AM     FLASH FLOOD      WESTPOINT               35.13N  87.53W
03/31/2021                   LAWRENCE           TN   EMERGENCY MNGR

            WESTPOINT ROAD AT WATERLOO ROAD FLOODED.

0350 AM     FLASH FLOOD      HENRYVILLE              35.39N  87.39W
03/31/2021                   LAWRENCE           TN   EMERGENCY MNGR

            HENRYVILLE ROAD FLOODED. MOST LOW WATER BRIDGES
            IMPASSABLE.

&&

EVENT NUMBER OHX2100421
EVENT NUMBER OHX2100422

SHAMBURGER

Local storm report, Mar 31, 4:03 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
403 AM CDT WED MAR 31 2021

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

0400 AM     FLASH FLOOD      5 WNW ETHRIDGE          35.36N  87.38W
03/31/2021                   LAWRENCE           TN   EMERGENCY MNGR

            42 WATER FORK ROAD WASHED OUT. NUMEROUS OTHER ROADS
            FLOODED ACROSS THE COUNTY.

&&

EVENT NUMBER OHX2100423

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 10:53 PM CDT	River Flood Advisory	OHX	Maury	10 hr
Mar 30, 11:04 PM CDT	Special Weather Statement	OHX	Cheatham, Dickson, Houston, Humphreys	41 min
Mar 30, 11:12 PM CDT	Special Weather Statement	OHX	Wayne	48 min
Mar 30, 11:40 PM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Humphreys, Perry	2 hr
Mar 30, 11:44 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Williamson	46 min
Mar 30, 11:53 PM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Williamson	3 hr
Mar 30, 11:58 PM CDT	Special Weather Statement	OHX	Lewis, Maury	47 min
Mar 30, 11:59 PM CDT	Special Weather Statement	OHX	Giles, Lawrence	46 min
Mar 31, 12:09 AM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	79 min
Mar 31, 12:28 AM CDT	Areal Flood Advisory	OHX	Rutherford, Sumner, Trousdale, Wilson	3 hr
Mar 31, 12:39 AM CDT	Special Weather Statement	OHX	Bedford, Giles, Lawrence, Marshall, Maury, Rutherford and 1 more	66 min
Mar 31, 1:28 AM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	8 hr
Mar 31, 2:13 AM CDT	Flash Flood Warning	OHX	Giles, Marshall, Maury	7 hr
Mar 31, 2:55 AM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Rutherford, Williamson, Wilson	3 hr
Mar 31, 3:35 AM CDT	River Flood Warning	OHX	Davidson	2 hr
Mar 31, 7:23 AM CDT	River Flood Advisory	OHX	Hickman	2 hr
Mar 31, 8:17 AM CDT	River Flood Advisory	OHX	Giles	5 hr
Mar 31, 8:42 AM CDT	River Flood Advisory	OHX	Lawrence	4 hr
Mar 31, 9:29 AM CDT	River Flood Advisory	OHX	Davidson, Williamson	17 hr
Mar 31, 1:02 PM CDT	River Flood Advisory	OHX	Perry, Wayne	25 hr
Mar 31, 1:05 PM CDT	River Flood Advisory	OHX	Bedford, Marshall	11 hr
Mar 31, 1:10 PM CDT	River Flood Warning	OHX	Lawrence	16 hr
Mar 31, 1:19 PM CDT	River Flood Warning	OHX	Giles	15 hr
Mar 31, 1:22 PM CDT	River Flood Advisory	OHX	Grundy	7 hr
Mar 31, 1:39 PM CDT	Freeze Warning	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	19 hr
Mar 31, 1:39 PM CDT	Hard Freeze Warning	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	43 hr
Mar 31, 5:23 PM CDT	River Flood Advisory	OHX	Cheatham, Montgomery	52 hr

Nearby

Areal Flood Advisories in Tennessee, 2021 Every areal flood advisory in 2021

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.