Alert archive / Tennessee / Flash Flood Warnings in 2008

Flash Flood Warning 39, NWS Memphis, TN

April 4, 2008Dyer County, Tennessee

NWS Memphis, TN issued this flash flood warning at Apr 4, 2008, 1:07 AM CDT for Dyer County, Tennessee. It was in force for 23 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: Apr 4, 2008, 1:07 AM CDT (06:07 UTC)
Expired: Apr 4, 2008, 1:30 AM CDT
In force: 23 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Dyer County, TN

The radar

The Memphis radar (KNQA), 89 km from the middle of the area, began a volume at 06:07 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
Apr 4, 1:30 AM CDT	FLASH FLOOD	Dyersburg, TN	SEVEN ROADS CLOSED ACROSS DYER COUNTY DUE TO HIGH 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 00:00Z, 6.1 hours before the alert went out and 255 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: 17 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 304 m²/s²
0-3 km storm-relative helicity: 378 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMEG 040608
FFWMEG
TNC045-040630-
/O.NEW.KMEG.FF.W.0039.080404T0607Z-080404T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
107 AM CDT FRI APR 4 2008

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DYER COUNTY IN NORTHWEST TENNESSEE...

* UNTIL 130 AM CDT

* AT 107 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN OVER THE WARNED AREA. 1 TO 3 INCHES OF RAINFALL HAS
  FALLEN ACROSS THE WARNED AREA. AN ADDITIONAL 2 TO 4 INCHES OF      
  RAINFALL IS POSSIBLE OVER THE NEXT COUPLE OF HOURS WITH A LINE OF
  THUNDERSTORMS MOVING FROM EASTERN ARKANSAS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEWBERN...
  MISTON...MILLSFIELD...HELOISE AND DYERSBURG.

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.

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT FLASH FLOODING ONLY...CALL 1 800 4 3 2 0 8 7 5.

LAT...LON 3619 8915 3603 8917 3589 8928 3587 8933
      3596 8941 3592 8965 3598 8973 3610 8968
      3613 8959 3619 8960 3619 8950 3622 8948
TIME...MOT...LOC 0607Z 180DEG 0KT 3603 8942

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 8:46 PM CDT	River Flood Warning	MEG	Dyer	20 hr
Apr 3, 8:46 PM CDT	River Flood Warning	MEG	Dyer	7 days
Apr 3, 11:42 PM CDT	Severe Thunderstorm Warning	MEG	Dyer, Lake, Obion	48 min
Apr 4, 12:25 AM CDT	Severe Thunderstorm Warning	MEG	Obion, Weakley	50 min
Apr 4, 2:51 AM CDT	Severe Thunderstorm Warning	MEG	Shelby	54 min
Apr 4, 9:55 AM CDT	River Flood Warning	MEG	Madison	4 days
Apr 4, 10:00 AM CDT	River Flood Warning	MEG	Fayette, Shelby	5 hr
Apr 4, 10:11 AM CDT	Flash Flood Warning	MEG	Fayette, Shelby, Tipton	6 hr
Apr 4, 10:17 AM CDT	Flash Flood Warning	MEG	Chester, Decatur, Fayette, Hardeman, Hardin, Haywood and 3 more	6 hr

Nearby

Flash Flood Warnings in Tennessee, 2008 Every flash flood warning in 2008

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.