Alert archive / Tennessee / Flash Flood Warnings in 2013

Flash Flood Warning 21, NWS Morristown, TN

August 9, 2013Bledsoe County, Tennessee

NWS Morristown, TN issued this flash flood warning at Aug 9, 2013, 3:44 PM CDT for Bledsoe County, Tennessee. It was in force for 2 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
Aug 9, 2013, 3:44 PM CDT (20:44 UTC)
Expired
Aug 9, 2013, 5:45 PM CDT
In force
2 hr
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Flood severity
None

County Bledsoe County, TN

The radar

The Northeast Alabama radar (KHTX), 122 km from the middle of the area, began a volume at 20:46 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
Aug 9, 4:10 PM CDTFLASH FLOODPikeville, TNWATER COVERING PARTS OF THE ROAD ON OLD STATE HIGHWAY 28 AND BIG SPRING GAP ROAD. CAUTION SIGNS IN PLACE.
Aug 9, 5:30 PM CDTFLASH FLOOD6 Ne Pikeville, TNFLOODING ON BIG SPRINGS GAP ROAD, BEAVER HILL, AND COVE HILL ROAD. POLICE OFFICER REPORTS A BAD SITUATION. NO FURTHER DETAILS AVAILABLE AT THIS TIME.

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 12:00Z, 8.7 hours before the alert went out and 140 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 12:00Z on 2013-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1933 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 12:00Z on 2013-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 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
1933 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
458 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

222 
WGUS54 KMRX 092044
FFWMRX
TNC007-092245-
/O.NEW.KMRX.FF.W.0021.130809T2044Z-130809T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
344 PM CDT FRI AUG 9 2013

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BLEDSOE COUNTY IN EAST TENNESSEE...
  THIS INCLUDES THE CITY OF PIKEVILLE...

* UNTIL 545 PM CDT

* AT 341 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM NEAR PIKEVILLE...MOVING
  NORTHEAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MELVINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
MORRISTOWN.

&&

LAT...LON 3572 8528 3575 8528 3577 8525 3578 8504
      3576 8503 3577 8491 3568 8499 3568 8498
      3563 8504 3556 8522 3570 8530

$$

DGS
1 follow-up statement
038 
WGUS74 KMRX 092124
FFSMRX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
424 PM CDT FRI AUG 9 2013

TNC007-092245-
/O.CON.KMRX.FF.W.0021.000000T0000Z-130809T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLEDSOE TN-
424 PM CDT FRI AUG 9 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
BLEDSOE COUNTY...

AT 419 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING.  THIS STORM WAS
LOCATED NEAR PIKEVILLE...MOVING NORTHEAST AT 10 MPH.

RADAR ESTIMATES THAT 4 TO 5 INCHES OF RAIN HAS FALLEN BETWEEN 
PIKEVILLE AND MELVINE OVER THE PAST FEW HOURS. LOCAL LAW ENFOREMENT 
HAS REPORTED SOME FLOODED ROADS IN THIS AREA. SOME CREEKS AND 
STREAMS IN THIS AREA THAT MAY FLOOD INCLUDE COLD SPRING COVE 
BRANCH...AND BEAVERDAM CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS. OTHER LOW LYING PLACES THAT NORMALLY
FLOOD EASILY COULD BECOME DEATH TRAPS. IF YOU COME TO A FLOODED OR 
CLOSED ROAD...TURN AROUND! DON'T DROWN! 

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
MORRISTOWN.

&&

LAT...LON 3572 8528 3575 8528 3577 8525 3578 8504
      3576 8503 3577 8491 3568 8499 3568 8498
      3563 8504 3556 8522 3570 8530

$$
DGS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 2:20 PM CDTAreal Flood AdvisoryMRXBledsoe115 min
Aug 9, 3:12 PM CDTFlash Flood WarningMRXRhea, Roane2 hr
Aug 9, 4:44 PM CDTAreal Flood AdvisoryMRXBlount, Knox, Loudon, McMinn, Monroe2 hr
Aug 9, 4:50 PM CDTAreal Flood AdvisoryMRXPolk115 min
Aug 9, 5:46 PM CDTFlash Flood WarningMRXBledsoe3 hr

Nearby

Flash Flood Warnings in Tennessee, 2013Every flash flood warning in 2013

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.