Alert archive / Tennessee / Flash Flood Warnings in 2012

Flash Flood Warning 15, NWS Nashville, TN

August 5, 2012White County, Tennessee

NWS Nashville, TN issued this flash flood warning at Aug 5, 2012, 2:24 PM CDT for White County, 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
Aug 5, 2012, 2:24 PM CDT (19:24 UTC)
Expired
Aug 5, 2012, 5:30 PM CDT
In force
3 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

County White County, TN

The radar

The Nashville radar (KOHX), 97 km from the middle of the area, began a volume at 19:28 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 5, 3:00 PM CDTFLASH FLOOD4 Nw Sparta, TNTWO ROADS CLOSED IN THE COUNTY DUE TO FLASH FLOODING
Aug 5, 3:00 PM CDTFLASH FLOOD5 Ene Sparta, TNPUBLIC REPORTED CALFKILLER RIVER WAS OUT OF ITS BANKS AND COMPLETELY SURROUNDED A HOME ON COAL BANK ROAD

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, 7.4 hours before the alert went out and 97 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 2012-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1769 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 2012-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
1769 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
739 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.6

Open this sounding in Storm Lab

The text

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

333 
WGUS54 KOHX 051924
FFWOHX
TNC185-052230-
/O.NEW.KOHX.FF.W.0015.120805T1924Z-120805T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
224 PM CDT SUN AUG 5 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN WHITE COUNTY IN MIDDLE TENNESSEE...

* UNTIL 530 PM CDT

* AT 224 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE 
  WARNED AREA. RADAR ESTIMATES THAT UP TO 4 INCHES OF RAIN HAS
  FALLEN ACROSS NORTHERN WHITE COUNTY OVER THE PAST HOUR. AN 
  ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE OVER THE NEXT ONE
  TO TWO HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SPARTA...BAKERS CROSSROADS...AND MACEDONIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3590 8539 3590 8562 3598 8566 3600 8564
      3602 8564 3605 8561 3604 8559 3606 8557
      3608 8553 3606 8538 3603 8532

$$

SHAMBURGER
1 follow-up statement
669 
WGUS74 KOHX 052016
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
316 PM CDT SUN AUG 5 2012

TNC185-052230-
/O.CON.KOHX.FF.W.0015.000000T0000Z-120805T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITE TN-
316 PM CDT SUN AUG 5 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN WHITE COUNTY
UNTIL 530 PM CDT...

AT 313 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR 
ESTIMATED THAT 3 TO 5 INCHES OF RAIN HAS FALLEN ACROSS NORTHERN 
WHITE COUNTY OVER THE PAST TWO HOURS.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...SPARTA...BAKERS CROSSROADS...AND MACEDONIA.

AT 245 PM CDT...THE PUBLIC REPORTED CALFKILLER RIVER WAS OUT OF ITS 
BANKS AND HAD RISEN INTO THE BACKYARD OF A HOME ALONG COAL BANK ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY 
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL 
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN NASHVILLE.

&&

LAT...LON 3590 8539 3590 8562 3598 8566 3600 8564
      3602 8564 3605 8561 3604 8559 3606 8557
      3608 8553 3606 8538 3603 8532

$$

SHAMBURGER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 11:37 AM CDTAreal Flood AdvisoryOHXSumner, Trousdale113 min
Aug 5, 12:09 PM CDTAreal Flood AdvisoryOHXMacon, Trousdale111 min
Aug 5, 1:00 PM CDTSpecial Weather StatementOHXDeKalb, Putnam60 min
Aug 5, 1:13 PM CDTAreal Flood AdvisoryOHXSmith, Wilson2 hr
Aug 5, 1:31 PM CDTSpecial Weather StatementOHXCannon44 min
Aug 5, 1:54 PM CDTSpecial Weather StatementOHXCumberland, Putnam, Van Buren, Warren, White66 min
Aug 5, 2:00 PM CDTAreal Flood AdvisoryOHXFentress, Pickett2 hr
Aug 5, 2:04 PM CDTAreal Flood AdvisoryOHXWhite116 min
Aug 5, 2:58 PM CDTSpecial Weather StatementOHXCumberland, Van Buren, Warren47 min
Aug 5, 3:06 PM CDTSevere Thunderstorm WarningOHXBenton, Humphreys, Perry39 min
Aug 5, 3:45 PM CDTSpecial Weather StatementOHXPerry60 min
Aug 5, 4:22 PM CDTSpecial Weather StatementOHXBenton, Cheatham, Dickson, Hickman, Houston, Humphreys and 4 more38 min
Aug 5, 5:08 PM CDTSpecial Weather StatementOHXRobertson52 min

Nearby

Flash Flood Warnings in Tennessee, 2012Every 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.