Alert archive / Tennessee / Flash Flood Warnings in 2007

Flash Flood Warning 5, NWS Nashville, TN

September 11, 2007Davidson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Sep 11, 2007, 10:01 AM CDT for Davidson County, Tennessee. It was in force for 119 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
Sep 11, 2007, 10:01 AM CDT (15:01 UTC)
Expired
Sep 11, 2007, 12:00 PM CDT
In force
119 min
Issued by
NWS Nashville, TN
Area
Counties, with a storm outline in the text
Flood severity
Moderate

County Davidson County, TN

The radar

The Nashville radar (KOHX), 19 km from the middle of the area, began a volume at 15:05 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 3.0 hours before the alert went out and 16 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 2007-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 203 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 2007-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.193958Sfc1 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
203 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
50 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.

000 
WGUS54 KOHX 111510 CCA
FFWOHX
TNC037-111700-
/T.COR.KOHX.FF.W.0002.070911T1501Z-070911T1700Z/
/00000.2.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
TEST...FLASH FLOOD WARNING...CORRECTED...TEST
NATIONAL WEATHER SERVICE NASHVILLE TN
1001 AM CDT TUE SEP 11 2007

...THIS MESSAGE IS FOR TEST PURPOSES ONLY...

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* THIS IS A TEST MESSAGE. FLASH FLOOD WARNING FOR A DAM FAILURE IN...
  CENTRAL DAVIDSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF NASHVILLE...

* UNTIL NOON CDT

* THIS IS A TEST MESSAGE. AT 1001 AM CDT...THE TEST DAM FAILED
  CAUSING FLASH FLOODING DOWNSTREAM ON THE TEST RIVER. TEST 
  CORRECTION MADE HERE.

* THIS IS A TEST MESSAGE. AFFECTED LOCATIONS INCLUDE BELLE MEADE...
  FOREST HILLS...NASHVILLE AND OAK HILL

THIS IS A TEST MESSAGE. DAM ON THE TEST RIVER UPSTREAM HAS GIVEN WAY 
AND HIGH WATERS ARE NOW MOVING DOWNSTREAM. AREAS DOWNSTREAM FROM THE 
DAM ALONG THE TEST RIVER SHOULD BE PREPARED FOR FLOODING. TAKE 
NECESSARY PRECAUTIONS IMMEDIATELY.

THIS IS A TEST MESSAGE. PEOPLE BELOW THE DAM SHOULD TAKE IMMEDIATE
ACTION BY MONITORING LOCAL RADIO OR TELEVISION AND FOLLOWING
INSTRUCTIONS FOR ANY REQUIRED EVACUATION AS OUTLINED BY LOCAL
EMERGENCY OFFICIALS.

THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE.

LAT...LON 3627 8665 3604 8661 3606 8696 3628 8693

$$

LAROSA
2 follow-up statements
000 
WGUS74 KOHX 111534
FFSOHX

TEST...FLASH FLOOD STATEMENT...TEST
NATIONAL WEATHER SERVICE NASHVILLE TN
1032 AM CDT TUE SEP 11 2007

...THIS MESSAGE IS FOR TEST PURPOSES ONLY...

TNC037-111542-
/T.EXP.KOHX.FF.W.0002.000000T0000Z-070911T1800Z/
/00000.0.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON TN-
1032 AM CDT TUE SEP 11 2007

...THIS MESSAGE IS FOR TEST PURPOSES ONLY...

...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL DAVIDSON COUNTY...

THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE.

LAT...LON 3627 8665 3604 8661 3606 8696 3628 8693

$$

LAROSA
000 
WGUS74 KOHX 111541
FFSOHX

TEST...FLASH FLOOD STATEMENT...TEST
NATIONAL WEATHER SERVICE NASHVILLE TN
1040 AM CDT TUE SEP 11 2007

...THIS MESSAGE IS FOR TEST PURPOSES ONLY...

TNC037-111550-
/T.CAN.KOHX.FF.W.0003.000000T0000Z-070911T1730Z/
/00000.U.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON TN-
1040 AM CDT TUE SEP 11 2007

...THIS MESSAGE IS FOR TEST PURPOSES ONLY...

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR DAVIDSON COUNTY...

THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE.

THIS COMPLETES ALL TESTING OF FLASH FLOOD WARNINGS AND SERVICES BY 
THE NATIONAL WEATHER SERVICE IN NASHVILLE. NO MORE TEST PRODUCTS 
WILL BE ISSUED TODAY.

LAT...LON 3620 8656 3604 8656 3598 8660 3605 8682
      3605 8694 3600 8704 3608 8704 3614 8699
      3638 8690 3634 8680 3640 8675

$$

LAROSA

Nearby

Flash Flood Warnings in Tennessee, 2007Every flash flood warning in 2007

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; radar from the NEXRAD Level II archive.