Alert archive / Tennessee / Flash Flood Warnings in 2014

Flash Flood Warning 29, NWS Nashville, TN

September 2, 2014Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Sep 2, 2014, 11:11 PM CDT for Maury County, Williamson 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
Sep 2, 2014, 11:11 PM CDT (04:11 UTC)
Expired
Sep 3, 2014, 1:15 AM CDT
In force
2 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

Counties Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 54 km from the middle of the area, began a volume at 04:13 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

TimeReportWhereRemark
Sep 2, 11:23 PM CDTFLASH FLOOD3 Ene Spring Hill, TNFLOODING REPORTED ON DUPLEX ROAD AT I-65

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 4.2 hours before the alert went out and 289 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, Birmingham, AL at 00:00Z on 2014-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1130 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, Birmingham, AL at 00:00Z on 2014-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
1130 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1298 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-16 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.

816 
WGUS54 KOHX 030411
FFWOHX
TNC119-187-030615-
/O.NEW.KOHX.FF.W.0029.140903T0411Z-140903T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1111 PM CDT TUE SEP 2 2014

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN MAURY COUNTY IN MIDDLE TENNESSEE...
   THIS INCLUDES THE CITY OF SPRING HILL...
  SOUTHEASTERN WILLIAMSON COUNTY IN MIDDLE TENNESSEE...
   THIS INCLUDES THE CITY OF THOMPSONS STATION...

* UNTIL 115 AM CDT

* AT 1109 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER THE
  WARNED AREA. RADAR ESTIMATES 1 TO 3 INCHES OF RAIN HAS FALLEN IN
  THE SPRING HILL AND THOMPSONS STATION AREAS OVER THE PAST HOUR. AN
  ADDITIONAL 1 TO 2 INCHES OF RAIN WILL BE POSSIBLE OVER THE NEXT
  FEW HOURS.

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 3572 8701 3583 8703 3592 8663 3589 8661
      3586 8662 3585 8660 3583 8662 3579 8661
      3580 8665 3575 8668 3575 8670 3571 8669
      3570 8677 3571 8678 3569 8682

$$

SHAMBURGER
2 follow-up statements
461 
WGUS74 KOHX 030446
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1146 PM CDT TUE SEP 2 2014

TNC119-187-030615-
/O.CON.KOHX.FF.W.0029.000000T0000Z-140903T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILLIAMSON TN-MAURY TN-
1146 PM CDT TUE SEP 2 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
NORTHEASTERN MAURY AND SOUTHEASTERN WILLIAMSON COUNTIES...

AT 1140 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN IN THE THOMPSONS 
STATION AND SPRING HILL AREAS. RADAR ESTIMATES 1 TO 4 INCHES OF RAIN 
HAS FALLEN IN THE WARNED AREA OVER THE PAST COUPLE OF HOURS. WITH 
MORE THUNDERSTORMS DEVELOPING AND MOVING INTO THE AREA...AN 
ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE OVER THE NEXT FEW 
HOURS. 

AT 1123 PM CDT...THE PUBLIC REPORTED FLOODING ON DUPLEX ROAD AT 
INTERSTATE 65 IN SPRING HILL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3572 8701 3583 8703 3592 8663 3589 8661
      3586 8662 3585 8660 3583 8662 3579 8661
      3580 8665 3575 8668 3575 8670 3571 8669
      3570 8677 3571 8678 3569 8682

$$

SHAMBURGER
151 
WGUS74 KOHX 030621
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
121 AM CDT WED SEP 3 2014

TNC119-187-030628-
/O.EXP.KOHX.FF.W.0029.000000T0000Z-140903T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILLIAMSON TN-MAURY TN-
121 AM CDT WED SEP 3 2014

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN MAURY AND
SOUTHEASTERN WILLIAMSON COUNTIES...

SHOWERS AND THUNDERSTORMS HAVE WEAKENED ACROSS THE AREA. RADAR SHOWS 
SOME LOCATIONS NEAR THOMPSONS STATION RECEIVED MORE THAN 3 INCHES OF 
RAIN DURING THE PAST 3 HOURS. 

THE THREAT FOR FLASH FLOODING HAS DIMINISHED...BUT SOME AREAS MAY 
STILL HAVE HIGH WATER LEVELS. BE ESPECIALLY CAUTIOUS OVERNIGHT WHEN 
IT IS VERY DIFFICULT TO JUDGE THE DEPTH OF WATER. 

LAT...LON 3572 8701 3583 8703 3592 8663 3589 8661
      3586 8662 3585 8660 3583 8662 3579 8661
      3580 8665 3575 8668 3575 8670 3571 8669
      3570 8677 3571 8678 3569 8682

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 7:02 PM CDTSpecial Weather StatementOHXJackson43 min
Sep 2, 7:16 PM CDTSevere Thunderstorm WarningOHXCumberland, Van Buren, White44 min
Sep 2, 7:44 PM CDTSpecial Weather StatementOHXOverton46 min
Sep 2, 7:48 PM CDTSpecial Weather StatementOHXVan Buren27 min
Sep 3, 3:50 PM CDTSpecial Weather StatementOHXCoffee40 min
Sep 3, 4:30 PM CDTSpecial Weather StatementOHXCoffee, Grundy, Warren45 min

Nearby

Flash Flood Warnings in Tennessee, 2014Every flash flood warning in 2014

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.