Alert archive / Tennessee / Flash Flood Watches in 2018

Flash Flood Watch 2, NWS Nashville, TN

June 28, 201814 counties in Tennessee

NWS Nashville, TN issued this flash flood watch at Jun 28, 2018, 12:07 PM CDT for 14 counties in Tennessee. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 28, 2018, 12:07 PM CDT (17:07 UTC)
Expired: Jun 28, 2018, 2:45 PM CDT
In force: 3 hr
Issued by: NWS Nashville, TN
Flood severity: None

Counties Bedford County, TN, Coffee County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Perry County, TN, Wayne County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 89 km from the middle of the area, began a volume at 17:06 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 12:00Z, 5.1 hours before the alert went out and 78 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: 2274 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 11.7

Open this sounding in Storm Lab

The text

As transmitted.

479 
WGUS64 KOHX 281707
FFAOHX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Nashville TN
1207 PM CDT Thu Jun 28 2018

...Heavy Thunderstorm Rains May Produce Flash Flooding Today...

.Several episodes of heavy thunderstorm rains are expected this 
afternoon over southern and western parts of Middle Tennessee, 
producing the potential for rain totals of 3 to 5 inches and 
localized flash flooding. 

TNZ023>025-056>061-075-077-093>095-290000-
/O.NEW.KOHX.FF.A.0002.180628T1707Z-180629T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Houston-Humphreys-Dickson-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Bedford-Coffee-Wayne-Lawrence-Giles-
Including the cities of Erin, Waverly, New Johnsonville, McEwen, 
Dickson, Linden, Lobelville, Centerville, Hohenwald, Franklin, 
Brentwood, Columbia, Lewisburg, Shelbyville, Tullahoma, 
Manchester, Clifton, Waynesboro, Lawrenceburg, and Pulaski
1207 PM CDT Thu Jun 28 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...

The National Weather Service in Nashville has issued a

* Flash Flood Watch for a portion of Middle Tennessee, including 
  the following areas, Bedford, Coffee, Dickson, Giles, Hickman, 
  Houston, Humphreys, Lawrence, Lewis, Marshall, Maury, Perry, 
  Wayne, and Williamson. 

* Until 7 PM CDT this evening

* Several periods of heavy thunderstorm rains with potential
  totals of 3 to 5 inches. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

1 follow-up statement

284 
WGUS64 KOHX 281945
FFAOHX

Flood Watch
National Weather Service Nashville TN
245 PM CDT Thu Jun 28 2018

...Flash Flood Watch Cancelled...

.Thunderstorms caused locally heavy rains earlier this afternoon
but have since weakened. Additional flooding rains are not
expected this afternoon in the southwest part of Middle Tennessee.

TNZ023>025-056>061-075-077-093>095-282045-
/O.CAN.KOHX.FF.A.0002.000000T0000Z-180629T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Houston-Humphreys-Dickson-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Bedford-Coffee-Wayne-Lawrence-Giles-
Including the cities of Erin, Waverly, New Johnsonville, McEwen, 
Dickson, Linden, Lobelville, Centerville, Hohenwald, Franklin, 
Brentwood, Columbia, Lewisburg, Shelbyville, Tullahoma, 
Manchester, Clifton, Waynesboro, Lawrenceburg, and Pulaski
245 PM CDT Thu Jun 28 2018

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of Middle Tennessee has been
cancelled. Thunderstorms caused locally heavy rains earlier this afternoon
but have since weakened and moved south into Alabama. Additional 
flooding rains are not expected this afternoon.

$$

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Jun 28, 11:58 AM CDT, 9 minutes earlier.

Area forecast discussion, Jun 28, 11:58 AM CDT, 9 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
1158 AM CDT Thu Jun 28 2018

.DISCUSSION...

A Severe Thunderstorm Watch remains in effect for much of western
and southern Middle Tennessee through 700 pm this evening. Even
though convection, along and east of I-65, has shown a sustained
progression to the south, a new wave of thunderstorms, pushing
into our northwestern counties, from Kentucky, could spread
additional thunderstorms and heavy rainfall back across northern
parts of the severe thunderstorm watch area later this afternoon.
As a result, because of this second shot of potential heavy
rainfall, will probably issue a short-fused FFA to coincide
precisely with the Severe Thunderstorm Watch area, and let it also
run through 7 pm. KOHX shows that 1 to 2 inches of rain has been
common along the band of storms over the past 3 hrs, and an
additional 1 to 2 inches is likely over some of those same areas
this afternoon.

&&

.AVIATION...
12Z TAF DISCUSSION.

One more active day expected today as a weak boundary passes.
Convection already occurring CSV vcnty expected to spread west
in the mid/late morning. Storms could affect all sites by 18z.
CIGs/VSBYs behind the precip will improve rapidly but MVFR/IFR
level fog likely to develop late night.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      90  75  94  75  95 /  60  20  30  10  20
Clarksville    90  75  94  74  95 /  60  20  30  10  20
Crossville     83  71  88  71  90 /  50  20  20  10  20
Columbia       90  75  94  74  94 /  60  20  40  10  30
Lawrenceburg   90  74  93  74  95 /  60  20  40  20  30
Waverly        90  75  94  73  94 /  60  20  30  10  20

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

DISCUSSION......Shamburger
AVIATION........19

Hazardous weather outlook, Jun 28, 11:05 AM CDT, 1 hour 2 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
1105 AM CDT Thu Jun 28 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-291100-
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-
1105 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...This Afternoon and Tonight

A few severe thunderstorms will be possible across southern and
western sections of Middle Tennessee. The main concern will be
damaging straight line winds, large hail and localized flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Excessive heat is likely Friday and Saturday...and hot weather
safety will be a paramount concern.

.SPOTTER INFORMATION STATEMENT...

Spotter and public reports are welcome today, and can be passed
along either by social media or by calling the National Weather
Service.

19

In the hours before

Special weather statement, Jun 28, 11:22 AM CDT, 45 minutes before

Special Weather Statement
National Weather Service Nashville TN
1122 AM CDT THU JUN 28 2018

TNZ005-006-023-024-281700-
Stewart TN-Humphreys TN-Montgomery TN-Houston TN-
1122 AM CDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MONTGOMERY...STEWART...
HOUSTON AND NORTHWESTERN HUMPHREYS COUNTIES UNTIL NOON CDT...

At 1122 AM CDT, Doppler radar was tracking strong thunderstorms
along a line extending from Land Between The Lakes Area to near
Cottage Grove. Movement was southeast at 55 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Waverly, Camden, Dover, Erin, Clarksville, New Johnsonville,
Tennessee Ridge, Big Rock, Cumberland City, Palmyra, Woodlawn,
Houston County Airport, Land Between The Lakes and Indian Mound.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
Middle Tennessee.

LAT...LON 3666 8785 3663 8785 3664 8723 3591 8793
      3594 8793 3595 8801 3603 8800 3612 8792
      3617 8792 3622 8795 3631 8796 3645 8806
      3656 8803 3668 8807
TIME...MOT...LOC 1622Z 299DEG 49KT 3672 8816 3635 8845

Shamburger

Local storm report, Jun 28, 11:31 AM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1131 AM CDT THU JUN 28 2018

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

1104 AM     TSTM WND DMG     7 SSE ROVER             35.57N  86.57W
06/28/2018                   BEDFORD            TN   TRAINED SPOTTER

            TREE DAMAGE WAS REPORTED OFF OLD COLUMBIA RD IN
            UNIONVILLE.

&&

EVENT NUMBER OHX1800214

MR3

Local storm report, Jun 28, 11:35 AM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1135 AM CDT THU JUN 28 2018

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

1038 AM     TSTM WND DMG     SPRING HILL             35.74N  86.92W
06/28/2018                   MAURY              TN   EMERGENCY MNGR

            MULTIPLE REPORTS OF TREES DOWN IN SPRING HILL INCLUDING
            A TREE ON A HOUSE ON NEELY'S BEND.

&&

EVENT NUMBER OHX1800215

MR3

Local storm report, Jun 28, 11:37 AM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
1137 AM CDT THU JUN 28 2018

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

0551 AM     TSTM WND DMG     7 SE BYRDSTOWN          36.49N  85.06W
06/28/2018                   FENTRESS           TN   EMERGENCY MNGR

            TREES DOWN IN THE DOUBLE TOP AREA.

0605 AM     TSTM WND DMG     1 N ALLARDT             36.40N  84.88W
06/28/2018                   FENTRESS           TN   EMERGENCY MNGR

            TREES DOWN ON GOVERNMENT POND RD.

0730 AM     FLASH FLOOD      JAMESTOWN               36.43N  84.94W
06/28/2018                   FENTRESS           TN   EMERGENCY MNGR

            MULTIPLE ROADS WERE FLOODED AND CLOSED IN THE JAMESTOWN
            AREA.

1038 AM     TSTM WND DMG     SPRING HILL             35.74N  86.92W
06/28/2018                   MAURY              TN   EMERGENCY MNGR

            MULTIPLE REPORTS OF TREES DOWN IN SPRING HILL INCLUDING
            A TREE ON A HOUSE ON NEELY'S BEND.

1104 AM     TSTM WND DMG     7 SSE ROVER             35.57N  86.57W
06/28/2018                   BEDFORD            TN   TRAINED SPOTTER

            TREE DAMAGE WAS REPORTED OFF OLD COLUMBIA RD IN
            UNIONVILLE.

&&

EVENT NUMBER OHX1800206 OHX1800207 OHX1800208 OHX1800215 OHX1800214

MR3

Local storm report, Jun 28, 11:44 AM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1144 AM CDT THU JUN 28 2018

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

1104 AM     TSTM WND DMG     LEWISBURG               35.45N  86.79W
06/28/2018                   MARSHALL           TN   EMERGENCY MNGR

            SEVERAL REPORTS OF TREES DOWN IN LEWISBURG.

&&

EVENT NUMBER OHX1800216

MR3

Special weather statement, Jun 28, 12:03 PM CDT, 4 minutes before

Special Weather Statement
National Weather Service Nashville TN
1203 PM CDT THU JUN 28 2018

TNZ023>025-057-059-060-281745-
Hickman TN-Williamson TN-Dickson TN-Humphreys TN-Maury TN-Houston TN-
1203 PM CDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR DICKSON...CENTRAL MAURY...WESTERN
WILLIAMSON...SOUTHEASTERN HOUSTON...EAST CENTRAL HUMPHREYS AND
EASTERN HICKMAN COUNTIES UNTIL 1245 PM CDT...

At 1203 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Dickson to near Spring Hill. Movement was
southeast at 30 mph.

Dime size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Columbia, Dickson, Centerville, Spring Hill, Mount Pleasant, White
Bluff, Thompson's Station, Burns, Fairview, Charlotte, Vanleer,
Slayden, Bon Aqua, Primm Springs, Lyles, I-65 East Of Columbia, Santa
Fe, Pinewood, Williamsport and Leipers Fork.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
Middle Tennessee.

LAT...LON 3632 8732 3613 8717 3605 8718 3604 8709
      3571 8682 3560 8683 3557 8721 3596 8760
      3633 8759
TIME...MOT...LOC 1703Z 316DEG 28KT 3614 8740 3571 8701

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 7:55 PM CDT	Areal Flood Advisory	OHX	Coffee, Grundy, Van Buren, Warren	3 hr
Jun 27, 10:21 PM CDT	Special Weather Statement	OHX	Sumner	24 min
Jun 27, 11:00 PM CDT	Special Weather Statement	OHX	Macon, Trousdale	30 min
Jun 28, 2:06 AM CDT	Special Weather Statement	OHX	Clay, Fentress, Overton, Pickett	54 min
Jun 28, 3:11 AM CDT	Special Weather Statement	OHX	Clay, Cumberland, Fentress, Overton, Pickett	94 min
Jun 28, 4:24 AM CDT	Areal Flood Advisory	OHX	Clay, Fentress, Overton, Pickett	2 hr
Jun 28, 5:21 AM CDT	Special Weather Statement	OHX	Fentress, Pickett	39 min
Jun 28, 6:06 AM CDT	Special Weather Statement	OHX	Fentress	24 min
Jun 28, 6:25 AM CDT	Flash Flood Warning	OHX	Fentress, Pickett	2 hr
Jun 28, 7:35 AM CDT	Special Weather Statement	OHX	Cumberland, Putnam, White	40 min
Jun 28, 8:30 AM CDT	Special Weather Statement	OHX	Van Buren	45 min
Jun 28, 9:00 AM CDT	Special Weather Statement	OHX	Rutherford	30 min
Jun 28, 9:11 AM CDT	Special Weather Statement	OHX	Montgomery	34 min
Jun 28, 9:32 AM CDT	Special Weather Statement	OHX	Williamson	28 min
Jun 28, 9:39 AM CDT	Special Weather Statement	OHX	Dickson	36 min
Jun 28, 9:39 AM CDT	Severe Thunderstorm Warning	OHX	Marshall, Rutherford, Williamson	36 min
Jun 28, 9:47 AM CDT	Special Weather Statement	OHX	Davidson, Williamson	43 min
Jun 28, 10:09 AM CDT	Areal Flood Advisory	OHX	Williamson	2 hr
Jun 28, 10:11 AM CDT	Special Weather Statement	OHX	Dickson	34 min
Jun 28, 10:17 AM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	43 min
Jun 28, 10:37 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	38 min
Jun 28, 10:55 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury	65 min
Jun 28, 10:59 AM CDT	Special Weather Statement	OHX	Bedford	31 min
Jun 28, 11:19 AM CDT	Special Weather Statement	OHX	Dickson	26 min
Jun 28, 11:22 AM CDT	Special Weather Statement	OHX	Houston, Montgomery, Stewart	38 min
Jun 28, 11:44 AM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Stewart	46 min
Jun 28, 11:48 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury	42 min
Jun 28, 12:03 PM CDT	Special Weather Statement	OHX	Dickson, Maury	42 min
Jun 28, 12:11 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	49 min
Jun 28, 12:18 PM CDT	Areal Flood Advisory	OHX	Houston, Humphreys, Stewart	117 min
Jun 28, 12:18 PM CDT	Special Weather Statement	OHX	Montgomery	27 min
Jun 28, 12:23 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall	52 min
Jun 28, 12:27 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Lewis, Perry	33 min
Jun 28, 12:39 PM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Houston, Humphreys, Williamson	3 hr
Jun 28, 12:43 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Hickman, Lawrence, Lewis, Maury, Williamson	32 min
Jun 28, 1:00 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Montgomery, Robertson, Williamson	45 min
Jun 28, 1:09 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Marshall, Maury	66 min
Jun 28, 1:43 PM CDT	Special Weather Statement	OHX	Davidson, Robertson, Rutherford, Sumner	62 min
Jun 28, 1:49 PM CDT	Areal Flood Advisory	OHX	Bedford, Giles, Hickman, Lawrence, Lewis, Marshall and 3 more	116 min
Jun 28, 2:11 PM CDT	Special Weather Statement	OHX	Bedford, Coffee, Grundy, Warren	64 min
Jun 28, 2:20 PM CDT	Heat Advisory	OHX	Dickson, Hickman, Houston, Humphreys, Lawrence, Lewis and 4 more	53 hr

Nearby

Flash Flood Watches in Tennessee, 2018 Every flash flood watch 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.