Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 38, NWS Nashville, TN

July 12, 2011Putnam County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 12, 2011, 11:57 AM CDT for Putnam County, Tennessee. It was in force for 3 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 12, 2011, 11:57 AM CDT (16:57 UTC)
Expired
Jul 12, 2011, 3:00 PM CDT
In force
3 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

County Putnam County, TN

The radar

The Nashville radar (KOHX), 94 km from the middle of the area, began a volume at 17:00 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
Jul 12, 12:00 PM CDTFLOODCookeville, TNAT THE INTERSECTION OF JACKSON AND WILLOW AVENUE, ROADS WERE CLOSED DUE TO RISING WATER.

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, 5.0 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 2011-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2386 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 2011-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 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
2386 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
1 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.

239 
WGUS54 KOHX 121657
FFWOHX
TNC141-122000-
/O.NEW.KOHX.FF.W.0038.110712T1657Z-110712T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1157 AM CDT TUE JUL 12 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PUTNAM COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF COOKEVILLE...

* UNTIL 300 PM CDT

* AT 1156 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALGOOD

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 3626 8542 3624 8541 3623 8537 3618 8526
      3606 8535 3610 8552 3603 8562 3605 8567
      3608 8570 3609 8576 3625 8579 3621 8558
      3628 8548

$$
31
1 follow-up statement
357 
WGUS74 KOHX 121815
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
115 PM CDT TUE JUL 12 2011

TNC141-122000-
/O.CON.KOHX.FF.W.0038.000000T0000Z-110712T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PUTNAM TN-
115 PM CDT TUE JUL 12 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR PUTNAM COUNTY UNTIL 300
PM CDT...

AT 114 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL HAD GENERALLY MOVED EAST OF 
THE WARNED AREA...BUT ISOLATED SHOWERS AND THUNDERSTORMS COULD 
CONTINUE TO DEVELOP AND OCCUR THROUGH THE AFTERNOON HOURS ACROSS THE 
COUNTY.
 
DOPPLER RADAR INDICATES THAT FOUR TO SIX INCHES OF TOTAL RAINFALL 
HAS OCCURRED...MAINLY ACROSS THE EASTERN HALF OF THE COUNTY...WITH 
THE POTENTIAL OF AN ADDITIONAL ONE TO TWO INCHES OF RAINFALL 
EXPECTED THROUGH THE REMAINDER OF THE AFTERNOON HOURS.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO 
OCCUR. SOME LOCATIONS THAT WILL CONTINUE EXPERIENCE FLASH FLOODING 
INCLUDE...COOKEVILLE...ALGOOD AND BAXTER.

SEVERAL STREETS IN AND AROUND COOKEVILLE WERE COVERED WITH WATER 
CAUSING A FEW ROAD CLOSURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM 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 ALSO SUBJECT TO FLOODING.

&&

LAT...LON 3626 8542 3624 8541 3623 8537 3618 8526
      3606 8535 3610 8552 3603 8562 3605 8567
      3608 8570 3609 8576 3625 8579 3621 8558
      3628 8548

$$
31

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 9:30 AM CDTSpecial Weather StatementOHXPickett15 min
Jul 12, 10:06 AM CDTFlash Flood WarningOHXOverton3 hr
Jul 12, 11:15 AM CDTSpecial Weather StatementOHXPutnam30 min
Jul 12, 11:45 AM CDTSpecial Weather StatementOHXJackson, Putnam45 min
Jul 12, 12:15 PM CDTSevere Thunderstorm WarningOHXMacon30 min
Jul 12, 12:34 PM CDTSpecial Weather StatementOHXDeKalb26 min
Jul 12, 12:42 PM CDTSpecial Weather StatementOHXSmith63 min
Jul 12, 12:52 PM CDTSpecial Weather StatementOHXSmith23 min
Jul 12, 1:19 PM CDTSpecial Weather StatementOHXDeKalb26 min
Jul 12, 1:23 PM CDTSpecial Weather StatementOHXCannon22 min
Jul 12, 1:48 PM CDTSpecial Weather StatementOHXCannon27 min

Nearby

Flash Flood Warnings in Tennessee, 2011Every flash flood warning in 2011

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.