Alert archive / Tennessee / Flash Flood Warnings in 2009

Flash Flood Warning 49, NWS Nashville, TN

July 15, 2009Perry County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 15, 2009, 8:24 PM CDT for Perry County, Tennessee. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 15, 2009, 8:24 PM CDT (01:24 UTC)
Expired: Jul 15, 2009, 10:15 PM CDT
In force: 111 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

County Perry County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.4 hours before the alert went out and 121 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: 1388 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1313 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KOHX 160124
FFWOHX
TNC135-160315-
/O.NEW.KOHX.FF.W.0049.090716T0124Z-090716T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
824 PM CDT WED JUL 15 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PERRY COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF LINDEN...

* UNTIL 1015 PM CDT

* AT 822 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 8 MILES NORTHWEST OF LINDEN...  
  MOVING SOUTH AT 10 MPH. DOPPLER RADAR HAS INDICATED THAT THREE TO
  FOUR INCHES OF RAINFALL AN HOUR HAS ALREADY FALLEN FROM            
  THUNDERSTORMS THAT ARE MOVING THROUGH AN AREA ALONG AND NORTH OF
  A STANDING ROCK TO LOBELVILLE LINE...WITH 4 TO 6 INCHES OF         
  RAINFALL OVER THE LAST THREE HOURS OCCURRING ACROSS EXTREME        
  NORTHWESTERN PORTIONS OF PERRY COUNTY.             

* THE THUNDERSTORM PRODUCING FLASH FLOODING WILL BE NEAR...
  LINDEN BY 855 PM CDT...

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.

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.

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 3584 8795 3584 8792 3581 8784 3583 8784
      3584 8772 3568 8774 3557 8766 3548 8784
      3548 8798

$$
31/JBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:10 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys	35 min
Jul 15, 7:20 PM CDT	Severe Thunderstorm Warning	OHX	Perry	40 min
Jul 15, 7:54 PM CDT	Severe Thunderstorm Warning	OHX	Benton	21 min
Jul 15, 8:33 PM CDT	Severe Thunderstorm Warning	OHX	Perry	57 min
Jul 15, 9:04 PM CDT	Flash Flood Warning	OHX	Benton	2 hr
Jul 15, 9:31 PM CDT	Flash Flood Warning	OHX	Lawrence, Lewis, Perry, Wayne	104 min
Jul 15, 10:29 PM CDT	Flash Flood Warning	OHX	Overton	3 hr
Jul 15, 10:34 PM CDT	Severe Thunderstorm Warning	OHX	Overton	31 min
Jul 15, 10:47 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	23 min
Jul 15, 11:48 PM CDT	Flash Flood Warning	OHX	Clay	3 hr
Jul 16, 12:07 AM CDT	Flash Flood Warning	OHX	Putnam	3 hr
Jul 16, 12:19 AM CDT	Flash Flood Warning	OHX	Jackson, Overton	2 hr
Jul 16, 5:01 AM CDT	Flash Flood Warning	OHX	Lawrence	3 hr
Jul 16, 5:31 AM CDT	Flash Flood Warning	OHX	Giles	119 min
Jul 16, 6:13 AM CDT	Flash Flood Warning	OHX	Lawrence, Lewis, Perry, Wayne	3 hr

Nearby

Flash Flood Warnings in Tennessee, 2009 Every flash flood warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.