Alert archive / Tennessee / Flash Flood Warnings in 2013

Flash Flood Warning 21, NWS Nashville, TN

July 4, 2013DeKalb County, Smith County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 4, 2013, 5:25 PM CDT for DeKalb County, Smith County, Tennessee. It was in force for 6 hr. 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 4, 2013, 5:25 PM CDT (22:25 UTC)
Expired
Jul 4, 2013, 11:30 PM CDT
In force
6 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

Counties DeKalb County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 59 km from the middle of the area, began a volume at 22:24 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, 10.4 hours before the alert went out and 63 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 2013-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 290 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 2013-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.19395878Sfc1 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
290 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
459 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

563 
WGUS54 KOHX 042225
FFWOHX
TNC041-159-050430-
/O.NEW.KOHX.FF.W.0021.130704T2225Z-130705T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
525 PM CDT THU JUL 4 2013

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SMITH COUNTY IN MIDDLE TENNESSEE...
  WESTERN DE KALB COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1130 PM CDT

* AT 522 PM CDT...DOPPLER RADAR CONTINUED TO SHOW RAIN AFFECTING     
  MOST OF THE WARNED AREA, WITH ADDITIONAL RAINFALL EXPECTED         
  THROUGHOUT THE EVENING. RAIN GAUGE REPORTS OF 5 TO 6 INCHES ARE    
  COMMON. EMERGENCY MANAGEMENT HAS REPORTED SEVERAL AREAS ALREADY    
  AFFECTED BY RISING WATER, AND CREEKS AND STREAMS WILL CONTINUE TO  
  RISE DURING THE NEXT SEVERAL HOURS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CARTHAGE...
  SMITHVILLE AND GORDONSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3641 8583 3629 8584 3624 8581 3613 8581
      3611 8579 3585 8577 3585 8589 3590 8594
      3607 8605 3629 8613 3639 8602 3640 8599
      3642 8597

$$

ROSE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 8:34 PM CDTAreal Flood AdvisoryOHXDavidson, Robertson, Sumner3 hr
Jul 3, 10:00 PM CDTFlash Flood WarningOHXDavidson, Robertson, Sumner3 hr
Jul 4, 9:55 AM CDTAreal Flood AdvisoryOHXBedford, Coffee, Giles, Lawrence, Lewis, Marshall and 1 more6 hr
Jul 4, 11:34 AM CDTSpecial Weather StatementOHXBedford26 min
Jul 4, 1:34 PM CDTAreal Flood AdvisoryOHXCannon, Davidson, Rutherford, Smith, Williamson, Wilson6 hr
Jul 4, 2:42 PM CDTFlash Flood WarningOHXBedford, Giles, Marshall, Maury3 hr
Jul 4, 4:18 PM CDTRiver Flood WarningOHXGiles18 hr
Jul 4, 4:39 PM CDTAreal Flood AdvisoryOHXClay, DeKalb, Jackson, Macon, Putnam, Smith and 3 more6 hr
Jul 4, 5:12 PM CDTRiver Flood AdvisoryOHXBedford15 hr

Nearby

Flash Flood Warnings in Tennessee, 2013Every flash flood warning in 2013

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.