Alert archive / Tennessee / Flash Flood Warnings in 2017

Flash Flood Warning 19, NWS Nashville, TN

July 15, 20175 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 15, 2017, 6:39 AM CDT for 5 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
Jul 15, 2017, 6:39 AM CDT (11:39 UTC)
Expired
Jul 15, 2017, 9:45 AM CDT
In force
3 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

Counties DeKalb County, TN, Putnam County, TN, Smith County, TN, White County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 51 km from the middle of the area, began a volume at 11:39 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

TimeReportWhereRemark
Jul 15, 8:00 AM CDTFLASH FLOOD5 Ene Lebanon, TNWATER WAS ENCROACHING ON HOUSE AT CARTHAGE HWY AT BIG SPRINGS ROAD EAST OF LEBANON.
Jul 15, 8:30 AM CDTFLASH FLOOD3 Se Gordonsville, TNWATER FLOWING OVER ROADWAY IN CLUB SPRINGS IN SMITH COUNTY

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 11.7 hours before the alert went out and 53 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 2017-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 848 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2017-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.1939Sfc1 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
848 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1126 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

190 
WGUS54 KOHX 151139
FFWOHX
TNC041-141-159-185-189-151445-
/O.NEW.KOHX.FF.W.0019.170715T1139Z-170715T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
639 AM CDT SAT JUL 15 2017

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southern Smith County in Middle Tennessee...
  Northern De Kalb County in Middle Tennessee...
  Northeastern Wilson County in Middle Tennessee...
  Northern White County in Middle Tennessee...
  Southwestern Putnam County in Middle Tennessee...

* Until 945 AM CDT

* At 639 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Cookeville, Lebanon, Sparta, Smithville, Watertown, Baxter,
  Gordonsville, Hickman, South Carthage, Alexandria, Dowelltown,
  Liberty, Hamptons Crossroads, Bakers Crossroads, Tuckers
  Crossroads, Burgess Falls State Park, Center Hill Lake and Edgar
  Evans State Park.

LAT...LON 3630 8627 3630 8625 3608 8528 3590 8534
      3601 8593 3601 8601 3609 8606 3607 8606
      3607 8605 3606 8606 3615 8634 3631 8628

$$

21
2 follow-up statements
668 
WGUS74 KOHX 151254
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
754 AM CDT SAT JUL 15 2017

TNC041-141-159-185-189-151445-
/O.CON.KOHX.FF.W.0019.000000T0000Z-170715T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smith TN-De Kalb TN-Wilson TN-White TN-Putnam TN-
754 AM CDT SAT JUL 15 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR
SOUTHERN SMITH...NORTHERN DE KALB...NORTHEASTERN WILSON...NORTHERN
WHITE AND SOUTHWESTERN PUTNAM COUNTIES...

At 753 AM CDT, Doppler radar indicated scattered heavy rain showers 
continuing across the warned area. 

Some locations that will experience flooding include...
Cookeville, Lebanon, Sparta, Smithville, Watertown, Baxter,
Gordonsville, Hickman, South Carthage, Alexandria, Dowelltown,
Liberty, Hamptons Crossroads, Bakers Crossroads, Tuckers Crossroads,
Burgess Falls State Park, Center Hill Lake and Edgar Evans State
Park.

LAT...LON 3630 8627 3630 8625 3608 8528 3590 8534
      3601 8593 3601 8601 3609 8606 3607 8606
      3607 8605 3606 8606 3615 8634 3631 8628

$$

21
350 
WGUS74 KOHX 151331
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
831 AM CDT SAT JUL 15 2017

TNC041-141-159-185-189-151445-
/O.CON.KOHX.FF.W.0019.000000T0000Z-170715T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smith TN-De Kalb TN-Wilson TN-White TN-Putnam TN-
831 AM CDT SAT JUL 15 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR
SOUTHERN SMITH...NORTHERN DE KALB...NORTHEASTERN WILSON...NORTHERN
WHITE AND SOUTHWESTERN PUTNAM COUNTIES...

At 828 AM CDT, Doppler radar indicated 2.5-3 inches of rain had 
fallen across the warned area. Flash flooding has been reported by 
emergency management. An addition 0.5-1 inch is possible in parts of 
the warned area in the next hour.

Some locations that will experience flooding include...
Cookeville, Lebanon, Sparta, Smithville, Watertown, Baxter,
Gordonsville, Hickman, South Carthage, Alexandria, Dowelltown,
Liberty, Hamptons Crossroads, Bakers Crossroads, Tuckers Crossroads,
Burgess Falls State Park, Center Hill Lake and Edgar Evans State
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3630 8627 3630 8625 3608 8528 3590 8534
      3601 8593 3601 8601 3609 8606 3607 8606
      3607 8605 3606 8606 3615 8634 3631 8628

$$

10

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 5:40 AM CDTAreal Flood AdvisoryOHXDeKalb, Putnam, White2 hr
Jul 15, 6:02 AM CDTAreal Flood AdvisoryOHXSmith, Wilson118 min
Jul 15, 8:40 AM CDTAreal Flood AdvisoryOHXCheatham, Davidson, Robertson2 hr
Jul 15, 8:56 AM CDTAreal Flood AdvisoryOHXDavidson, Sumner, Wilson2 hr
Jul 15, 9:22 AM CDTAreal Flood AdvisoryOHXCheatham, Davidson, Dickson, Montgomery113 min
Jul 15, 10:06 AM CDTFlash Flood WatchOHXBedford, Cannon, Cheatham, Coffee, Cumberland, Davidson and 21 more5 hr
Jul 15, 10:13 AM CDTFlash Flood WarningOHXCheatham, Davidson, Dickson, Williamson2 hr
Jul 15, 12:43 PM CDTAreal Flood AdvisoryOHXPerry2 hr
Jul 15, 1:11 PM CDTAreal Flood AdvisoryOHXLawrence, Lewis, Perry, Wayne2 hr

Nearby

Flash Flood Warnings in Tennessee, 2017Every flash flood warning in 2017

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.