Alert archive / Tennessee / Flash Flood Warnings in 2012

Flash Flood Warning 10, NWS Morristown, TN

July 10, 2012Sullivan County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 10, 2012, 8:02 AM EDT for Sullivan 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: Jul 10, 2012, 8:02 AM EDT (12:02 UTC)
Expired: Jul 10, 2012, 10:09 AM EDT
In force: 2 hr
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Flood severity: None

County Sullivan County, TN

The radar

The Knoxville radar (KMRX), 111 km from the middle of the area, began a volume at 12:03 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
Jul 10, 9:00 AM EDT	FLOOD	3 Nw Blountville, TN	SEVERAL ROADS CLOSED DUE TO HIGH WATER BETWEEN BLOUNTVILLE AND BRISTOL

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, 0.0 hours before the alert went out and 213 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: 526 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

112 
WGUS54 KMRX 101202
FFWMRX
TNC163-101500-
/O.NEW.KMRX.FF.W.0010.120710T1202Z-120710T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
802 AM EDT TUE JUL 10 2012

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SULLIVAN COUNTY IN EAST TENNESSEE...
  THIS INCLUDES THE CITY OF BRISTOL TN...

* UNTIL 1100 AM EDT

* AT 754 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED           
  WIDESPREAD FLOODING OF AREAL ROADWAYS ACROSS SULLIVAN COUNTY.
  RADAR ESTIMATED UP TO 4 INCHES OF RAIN HAS FALLEN ACROSS SULLIVAN  
  COUNTY...GENERALLY BETWEEN BLOUNTVILLE AND BRISTOL.  ADDITIONAL    
  RAINFALL UP TO 1 INCH IS POSSIBLE.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
  HOLSTON DAM AND BLOUNTVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3646 8208 3642 8220 3644 8251 3659 8244
      3659 8204

$$

DH

2 follow-up statements

263 
WGUS74 KMRX 101310
FFSMRX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
910 AM EDT TUE JUL 10 2012

TNC163-101500-
/O.CON.KMRX.FF.W.0010.000000T0000Z-120710T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SULLIVAN TN-
910 AM EDT TUE JUL 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 AM EDT FOR
SULLIVAN COUNTY...

AT 906 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SEVERAL
ROADS CLOSED DUE TO HIGH WATER BETWEEN BLOUNTVILLE AND BRISTOL...
SUCH AS PLEASANT GROVE.  RAINFALL ESTIMATES FROM THE DOPPLER RADAR 
ARE BETWEEN 4 AND 5 INCHES ACROSS THESE AREAS.  ADDITIONAL RAINFALL 
UP TO 1 INCH IS POSSIBLE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BRISTOL TN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3646 8208 3642 8220 3644 8251 3659 8244
      3659 8204

$$

DH

364 
WGUS74 KMRX 101409
FFSMRX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1009 AM EDT TUE JUL 10 2012

TNC163-101417-
/O.CAN.KMRX.FF.W.0010.000000T0000Z-120710T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SULLIVAN TN-
1009 AM EDT TUE JUL 10 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SULLIVAN COUNTY...

THE HEAVY RAINFALL THAT PROMPTED THE WARNING HAS ENDED ACROSS THE
WARNED AREA...AND THE FLOOD THREAT HAS DIMINISHED. THEREFORE...THE
WARNING HAS BEEN CANCELLED.

HOWEVER...PONDING OF WATER ACROSS LOW LYING AREAS ARE EXPECTED.  
WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN 
AROUND...DONT DROWN.

LAT...LON 3646 8208 3642 8220 3644 8251 3659 8244
      3659 8204

$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:58 PM EDT	Areal Flood Advisory	MRX	Bledsoe, Meigs, Rhea, Sequatchie	3 hr
Jul 9, 9:07 PM EDT	Areal Flood Advisory	MRX	Meigs, Rhea, Roane	113 min
Jul 9, 10:32 PM EDT	Flash Flood Warning	MRX	Bledsoe, Meigs, Rhea	3 hr
Jul 9, 10:50 PM EDT	Areal Flood Advisory	MRX	McMinn	115 min
Jul 10, 2:54 AM EDT	Areal Flood Advisory	MRX	Blount, Knox	93 min
Jul 10, 3:39 AM EDT	Areal Flood Advisory	MRX	Campbell, Scott	111 min
Jul 10, 7:16 AM EDT	Areal Flood Advisory	MRX	Carter, Johnson, Sullivan	119 min
Jul 10, 12:59 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Sequatchie	61 min
Jul 10, 1:35 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	55 min
Jul 10, 2:02 PM EDT	Areal Flood Advisory	MRX	Hamilton	3 hr
Jul 10, 2:25 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Polk	65 min
Jul 10, 3:03 PM EDT	Flash Flood Warning	MRX	Bradley, Polk	3 hr
Jul 10, 3:07 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Bradley, Loudon, McMinn, Monroe, Polk	53 min
Jul 10, 3:38 PM EDT	Areal Flood Advisory	MRX	McMinn	3 hr
Jul 10, 3:59 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon, McMinn, Monroe	61 min
Jul 10, 4:30 PM EDT	Areal Flood Advisory	MRX	Monroe	2 hr
Jul 10, 5:03 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Sevier	57 min
Jul 10, 5:20 PM EDT	Areal Flood Advisory	MRX	Blount	115 min
Jul 10, 6:01 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Jefferson, Sevier	59 min
Jul 10, 6:09 PM EDT	Areal Flood Advisory	MRX	Sevier	111 min
Jul 10, 7:05 PM EDT	Areal Flood Advisory	MRX	Cocke	115 min
Jul 10, 7:11 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr

Nearby

Flash Flood Warnings in Tennessee, 2012 Every flash flood warning in 2012

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.