Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 33, NWS Nashville, TN

July 4, 2011Van Buren County, Warren County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 4, 2011, 9:55 PM CDT for Van Buren County, Warren County, Tennessee. It was in force for 94 min. 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 4, 2011, 9:55 PM CDT (02:55 UTC)
Expired: Jul 4, 2011, 11:29 PM CDT
In force: 94 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Van Buren County, TN, Warren County, TN

The radar

The Northeast Alabama radar (KHTX), 108 km from the middle of the area, began a volume at 02:57 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

Time	Report	Where	Remark
Jul 4, 10:46 PM CDT	FLOOD	5 N Mcminnville, TN	A FEW LOCATIONS ALONG BLUFF SPRINGS ROAD NORTH OF MCMINNVILLE CLOSED DUE TO WATER OVER THE ROAD.

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 00:00Z, 2.9 hours before the alert went out and 106 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: 1850 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

634 
WGUS54 KOHX 050255
FFWOHX
TNC175-177-050600-
/O.NEW.KOHX.FF.W.0033.110705T0255Z-110705T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
955 PM CDT MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN VAN BUREN COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF SPENCER...
  NORTHERN WARREN COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF MCMINNVILLE...

* UNTIL 100 AM CDT

* AT 951 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAINFALL OVER THE WARNED AREA. HEAVIEST RAINFALL IS          
  INDICATED OVER ROCKY RIVER...DRY BRANCH AND HICKORY GROVE BRANCH.

* THE STORMS PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTIES.

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. MOVE TO HIGHER GROUND.

&&

LAT...LON 3567 8532 3568 8588 3583 8587 3583 8565
      3580 8560 3580 8553 3582 8551 3582 8541
      3580 8535 3581 8533 3581 8528

$$

JLM

1 follow-up statement

154 
WGUS74 KOHX 050429
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1129 PM CDT MON JUL 4 2011

TNC175-177-050442-
/O.CAN.KOHX.FF.W.0033.000000T0000Z-110705T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN TN-VAN BUREN TN-
1129 PM CDT MON JUL 4 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN VAN BUREN
AND NORTHERN WARREN COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS DIMINISHED SIGNIFICANTLY OVER THE 
WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA ARE RECEEDING 
...ENDING THE FLASH FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3567 8532 3568 8588 3583 8587 3583 8565
      3580 8560 3580 8553 3582 8551 3582 8541
      3580 8535 3581 8533 3581 8528

$$

JLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:55 PM CDT	Flash Flood Warning	OHX	Cumberland	118 min

Nearby

Flash Flood Warnings in Tennessee, 2011 Every 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.