Alert archive / Tennessee / Flash Flood Warnings in 2016

Flash Flood Warning 7, NWS Morristown, TN

August 7, 2016Greene County, Hamblen County, Tennessee

NWS Morristown, TN issued this flash flood warning at Aug 7, 2016, 7:10 PM EDT for Greene County, Hamblen County, Tennessee. It was in force for 2 hr. 1 report 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: Aug 7, 2016, 7:10 PM EDT (23:10 UTC)
Expired: Aug 7, 2016, 9:15 PM EDT
In force: 2 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

Counties Greene County, TN, Hamblen County, TN

The radar

The Knoxville radar (KMRX), 21 km from the middle of the area, began a volume at 23:13 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
Aug 7, 7:45 PM EDT	FLASH FLOOD	4 Ne Morristown, TN	SEVERAL FLOODED ROADWAYS ACROSS NORTHERN HAMBLEN COUNTY.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.2 hours before the alert went out and 296 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: 405 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

982 
WGUS54 KMRX 072310
FFWMRX
TNC059-063-080115-
/O.NEW.KMRX.FF.W.0007.160807T2310Z-160808T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
710 PM EDT SUN AUG 7 2016

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL GREENE COUNTY IN EASTERN TENNESSEE...
  NORTHERN HAMBLEN COUNTY IN EASTERN TENNESSEE...

* UNTIL 915 PM EDT

* AT 709 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. IN EXCESS OF TWO INCHES OF RAIN
  HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MORRISTOWN...RUSSELLVILLE...MOSHEIM...BULLS GAP AND MOHAWK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 3627 8310 3624 8308 3626 8305 3623 8298
      3611 8304 3616 8317 3618 8317 3617 8319
      3616 8318 3623 8338 3629 8332 3627 8331
      3628 8330 3626 8328 3629 8326 3628 8323
      3630 8323 3629 8322 3631 8319

$$

DH

1 follow-up statement

108 
WGUS74 KMRX 080020
FFSMRX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
820 PM EDT SUN AUG 7 2016

TNC059-063-080027-
/O.CAN.KMRX.FF.W.0007.000000T0000Z-160808T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENE TN-HAMBLEN TN-
820 PM EDT SUN AUG 7 2016

...THE FLASH FLOOD WARNING FOR WEST CENTRAL GREENE AND NORTHEASTERN
HAMBLEN COUNTIES IS CANCELLED...

FLOOD WATERS ARE RECEDING. HOWEVER...RECENT HEAVY RAINS HAS CAUSED A
GOOD DEAL OF PONDING OF WATER ACROSS LOW LYING AREAS. REMEMBER...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS.  MOST
FLOOD DEATHS OCCUR IN VEHICLES.

LAT...LON 3627 8310 3624 8308 3626 8305 3623 8298
      3611 8304 3616 8317 3618 8317 3617 8319
      3616 8318 3623 8338 3629 8332 3627 8331
      3628 8330 3626 8328 3629 8326 3628 8323
      3630 8323 3629 8322 3631 8319

$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:07 PM EDT	Special Weather Statement	MRX	Morgan, Roane	53 min
Aug 7, 2:19 PM EDT	Areal Flood Advisory	MRX	Anderson, Campbell, Scott	116 min
Aug 7, 3:08 PM EDT	Areal Flood Advisory	MRX	Monroe	2 hr
Aug 7, 3:47 PM EDT	Flash Flood Warning	MRX	Monroe	118 min
Aug 7, 3:57 PM EDT	Special Weather Statement	MRX	Monroe	33 min
Aug 7, 4:00 PM EDT	Special Weather Statement	MRX	Sevier	30 min
Aug 7, 4:32 PM EDT	Special Weather Statement	MRX	Jefferson	58 min
Aug 7, 4:38 PM EDT	Special Weather Statement	MRX	Blount	67 min
Aug 7, 4:46 PM EDT	Special Weather Statement	MRX	Carter	59 min
Aug 7, 5:00 PM EDT	Areal Flood Advisory	MRX	Blount	2 hr
Aug 7, 5:06 PM EDT	Areal Flood Advisory	MRX	Carter, Johnson, Sullivan, Unicoi, Washington	114 min
Aug 7, 5:14 PM EDT	Special Weather Statement	MRX	Hamblen	46 min
Aug 7, 5:33 PM EDT	Flash Flood Warning	MRX	Carter, Johnson, Sullivan, Washington	117 min
Aug 7, 6:14 PM EDT	Areal Flood Advisory	MRX	Cocke, Greene, Hamblen, Jefferson	2 hr
Aug 7, 6:32 PM EDT	Areal Flood Advisory	MRX	Sullivan	118 min
Aug 7, 7:32 PM EDT	Areal Flood Advisory	MRX	Claiborne, Grainger, Hancock, Hawkins	3 hr
Aug 7, 7:44 PM EDT	Areal Flood Advisory	MRX	Knox	2 hr
Aug 7, 7:49 PM EDT	Areal Flood Advisory	MRX	Hamilton, Marion	116 min

Nearby

Flash Flood Warnings in Tennessee, 2016 Every flash flood warning in 2016

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.