Alert archive / Tennessee / Flash Flood Warnings in 2017

Flash Flood Warning 34, NWS Nashville, TN

December 23, 20174 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Dec 23, 2017, 1:04 AM CST for 4 counties in Tennessee. It was in force for 3 hr. 5 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: Dec 23, 2017, 1:04 AM CST (07:04 UTC)
Expired: Dec 23, 2017, 4:00 AM CST
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Houston County, TN, Montgomery County, TN, Robertson County, TN, Stewart County, TN

The radar

The Ft Campbell radar (KHPX), 51 km from the middle of the area, began a volume at 07:02 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
Dec 23, 1:30 AM CST	FLASH FLOOD	8 E Dover, TN	VEHICLE STUCK IN HIGH WATER ON HIGHWAY 46 IN INDIAN MOUND. SEVERAL OTHER ROADS REPORTEDLY FLOODED THROUGHOUT STEWART COUNTY.
Dec 23, 1:30 AM CST	HEAVY RAIN 3.14	6 Wnw Dover, TN	RAWS GAUGE STHT1 MEASURED A 24 HOUR RAINFALL OF 3.14 INCHES WITH RAIN STILL FALLING.
Dec 23, 1:38 AM CST	HEAVY RAIN 2.83	3 W Clarksville, TN	HOME WEATHER STATION MEASURED 2.83 INCHES OF RAIN SO FAR
Dec 23, 1:50 AM CST	FLASH FLOOD	Dover, TN	NUMEROUS ROADS FLOODED AND CLOSED ACROSS STEWART COUNTY INCLUDING GILLUM HOLLOW ROAD...BELLWOOD LANDING ROAD...HIGHWAY 120...HIGHWAY 46 NEAR SPRINGS RORIE HOLLOW ROAD...SHEPHERD HOLLOW ROAD...RAY CRAIN ROAD...AND NORTH CROSS CREEK ROAD. ONE HOUSE IN THE CARLIS
Dec 23, 4:00 AM CST	FLASH FLOOD	Cedar Hill, TN	MULTIPLE ROADS CLOSED DUE TO FLOODING IN NORTHWEST AND MIDDLE PARTS OF ROBERTSON 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, 7.1 hours before the alert went out and 109 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: 715 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

688 
WGUS54 KOHX 230704
FFWOHX
TNC083-125-147-161-231000-
/O.NEW.KOHX.FF.W.0034.171223T0704Z-171223T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
104 AM CST SAT DEC 23 2017

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Montgomery County in Middle Tennessee...
  Stewart County in Middle Tennessee...
  Houston County in Middle Tennessee...
  Northwestern Robertson County in Middle Tennessee...

* Until 400 AM CST

* At 102 AM CST, emergency management reported heavy rain causing 
  flash flooding across the warned area, with reports of several 
  flooded roads and stranded vehicles. Radar estimates two to four 
  inches of rain have fallen scross parts of the area. Flash 
  flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Clarksville, Dover, Erin, Tennessee Ridge, Big Rock, Adams, Cedar
  Hill, Cumberland City, Palmyra, Woodlawn, Houston County Airport,
  Land Between The Lakes, Indian Mound and Cunningham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3666 8785 3663 8785 3665 8676 3647 8713
      3634 8751 3624 8774 3625 8780 3623 8784
      3625 8795 3631 8796 3645 8806 3656 8803
      3668 8807

$$

Shamburger

2 follow-up statements

999 
WGUS74 KOHX 230802
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
202 AM CST SAT DEC 23 2017

TNC083-125-147-161-231000-
/O.CON.KOHX.FF.W.0034.000000T0000Z-171223T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TN-Stewart TN-Houston TN-Robertson TN-
202 AM CST SAT DEC 23 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM CST FOR
MONTGOMERY...STEWART...HOUSTON AND NORTHWESTERN ROBERTSON COUNTIES...

At 158 AM CST, emergency management reported flash flooding ongoing 
across the warned area. Stewart County emergency management reported 
numerous roads were flooded and closed across the county including 
Highway 120 and Highway 46. Radar estimates up to 4 inches of rain 
has fallen across the warned area so far. An additional half inch to 
one inch of rain is possible the next few hours.

Some locations that will experience flooding include...
Clarksville, Dover, Erin, Tennessee Ridge, Big Rock, Adams, Cedar
Hill, Cumberland City, Palmyra, Woodlawn, Houston County Airport,
Land Between The Lakes, Indian Mound and Cunningham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding. Remember, Turn Around Don't Drown.

&&

LAT...LON 3666 8785 3663 8785 3665 8676 3647 8713
      3634 8751 3624 8774 3625 8780 3623 8784
      3625 8795 3631 8796 3645 8806 3656 8803
      3668 8807

$$

Shamburger

762 
WGUS74 KOHX 230907
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
307 AM CST SAT DEC 23 2017

TNC083-125-147-161-231000-
/O.CON.KOHX.FF.W.0034.000000T0000Z-171223T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery TN-Stewart TN-Houston TN-Robertson TN-
307 AM CST SAT DEC 23 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM CST FOR
MONTGOMERY...STEWART...HOUSTON AND NORTHWESTERN ROBERTSON COUNTIES...

At 305 AM CST, Doppler radar indicated heavy rain across the warned 
area is gradually ending. However, radar estimates and gauge reports 
indicate 2 to 5 inches of rain has fallen across the warned area. 
Flash flooding is expected to continue in some areas through 4 AM.

Some locations that will experience flooding include...
Clarksville, Dover, Erin, Tennessee Ridge, Big Rock, Adams, Cedar
Hill, Cumberland City, Palmyra, Woodlawn, Houston County Airport,
Land Between The Lakes, Indian Mound and Cunningham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3666 8785 3663 8785 3665 8676 3647 8713
      3634 8751 3624 8774 3625 8780 3623 8784
      3625 8795 3631 8796 3645 8806 3656 8803
      3668 8807

$$

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 23, 12:09 AM CST	River Flood Advisory	OHX	Giles	41 hr
Dec 23, 12:19 AM CST	River Flood Advisory	OHX	Lawrence	9 hr
Dec 23, 12:51 AM CST	River Flood Warning	OHX	Hickman	3 days
Dec 23, 3:11 AM CST	Special Weather Statement	OHX	Davidson, Williamson	49 min
Dec 23, 3:41 AM CST	Special Weather Statement	OHX	Clay, Macon, Smith, Trousdale, Wilson	49 min
Dec 23, 3:54 AM CST	Special Weather Statement	OHX	Rutherford, Williamson	51 min
Dec 23, 3:58 AM CST	Flash Flood Warning	OHX	Houston, Montgomery, Robertson, Stewart	3 hr
Dec 23, 4:00 AM CST	River Flood Advisory	OHX	Perry	10 hr
Dec 23, 5:10 AM CST	River Flood Advisory	OHX	Davidson	6 hr
Dec 23, 5:15 AM CST	River Flood Advisory	OHX	Davidson	3 hr
Dec 23, 5:30 AM CST	Areal Flood Advisory	OHX	Hickman, Lawrence, Lewis, Maury, Perry, Wayne	3 hr
Dec 23, 5:31 AM CST	River Flood Advisory	OHX	Davidson	3 hr
Dec 23, 5:47 AM CST	River Flood Advisory	OHX	Davidson, Williamson	32 hr
Dec 23, 5:52 AM CST	River Flood Advisory	OHX	Cheatham	11 hr
Dec 23, 5:52 AM CST	River Flood Advisory	OHX	Hickman	9 hr
Dec 23, 6:02 AM CST	River Flood Advisory	OHX	Davidson	4 hr
Dec 23, 6:08 AM CST	Special Weather Statement	OHX	Bedford, Cannon, Giles, Marshall, Rutherford	67 min
Dec 23, 6:15 AM CST	River Flood Advisory	OHX	Davidson	2 hr
Dec 23, 6:56 AM CST	Areal Flood Advisory	OHX	Houston, Montgomery, Robertson, Stewart	2 hr
Dec 23, 7:07 AM CST	River Flood Advisory	OHX	Davidson	3 hr
Dec 23, 9:10 AM CST	River Flood Advisory	OHX	Cheatham	5 hr
Dec 23, 10:09 AM CST	River Flood Advisory	OHX	Davidson	7 hr
Dec 23, 10:23 AM CST	River Flood Advisory	OHX	Bedford	7 hr
Dec 23, 1:14 PM CST	River Flood Advisory	OHX	Maury	36 hr
Dec 23, 1:21 PM CST	River Flood Warning	OHX	Montgomery, Robertson	23 hr
Dec 23, 1:37 PM CST	River Flood Warning	OHX	Perry	69 hr
Dec 23, 1:57 PM CST	River Flood Advisory	OHX	Lawrence	14 hr
Dec 23, 2:15 PM CST	River Flood Warning	OHX	Cheatham	21 hr
Dec 23, 2:23 PM CST	River Flood Warning	OHX	Hickman	24 hr
Dec 23, 4:41 PM CST	River Flood Advisory	OHX	Perry, Wayne	12 hr

Nearby

Flash Flood Warnings in Tennessee, 2017 Every 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.