Alert archive / Tennessee / Flash Flood Watches in 2013

Flash Flood Watch 7, NWS Memphis, TN

August 8, 201314 counties in Tennessee; 10 counties in Arkansas

NWS Memphis, TN issued this flash flood watch at Aug 8, 2013, 8:37 PM CDT for 14 counties in Tennessee; 10 counties in Arkansas. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Aug 8, 2013, 8:37 PM CDT (01:37 UTC)
Expired
Aug 9, 2013, 5:00 AM CDT
In force
8 hr
Issued by
NWS Memphis, TN
Flood severity
None
All 24 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Carroll County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 59 km from the middle of the area, began a volume at 01:37 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

Little Rock, AR (KBYH), launched 00:00Z, 1.6 hours before the alert went out and 117 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, Little Rock, AR at 00:00Z on 2013-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3149 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2013-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
3149 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1364 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Memphis, TN wrote its last area forecast discussion before this flash flood watch went out at Aug 8, 8:14 PM CDT, 23 minutes earlier.

Area forecast discussion, Aug 8, 8:14 PM CDT, 23 minutes before
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Hazardous weather outlook, Aug 8, 7:51 PM CDT, 46 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MEMPHIS TN
751 PM CDT THU AUG 8 2013

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-100300-
ALCORN-BENTON MS-CALHOUN-CARROLL-CHESTER-CHICKASAW-CLAY-COAHOMA-
CRAIGHEAD-CRITTENDEN-CROCKETT-CROSS-DESOTO-DECATUR-DUNKLIN-DYER-
FAYETTE-GIBSON-GREENE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-HENRY-
ITAWAMBA-LAFAYETTE-LAKE-LAUDERDALE-LAWRENCE-LEE AR-LEE MS-MADISON-
MARSHALL-MCNAIRY-MISSISSIPPI-MONROE-OBION-PANOLA-PEMISCOT-
PHILLIPS-POINSETT-PONTOTOC-PRENTISS-QUITMAN-RANDOLPH-SHELBY-
ST. FRANCIS-TALLAHATCHIE-TATE-TIPPAH-TIPTON-TISHOMINGO-TUNICA-
UNION-WEAKLEY-YALOBUSHA-
751 PM CDT THU AUG 8 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS...
THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE.

.DAY ONE...TONIGHT

A FEW SEVERE THUNDERSTORMS ARE POSSIBLE UNTIL MIDNIGHT ACROSS
PORTIONS OF EASTERN ARKANSAS AND THE MISSOURI BOOTHEEL. DAMAGING
WINDS...LARGE HAIL...AND LOCALLY HEAVY RAINFALL WITH LOCALIZED
FLASH FLOODING ARE POSSIBLE.

OTHERWISE FOR TONIGHT...A FEW STRONG STORMS WILL BE POSSIBLE WITH
STRONG GUSTY WINDS AND HEAVY RAINFALL WITH LOCALIZED FLASH
FLOODING...MAINLY ACROSS NORTHEAST ARKANSAS...THE MISSOURI
BOOTHEEL AND NORTHWEST TENNESSEE.

A HEAT ADVISORY IS IN EFFECT FOR EAST CENTRAL ARKANSAS...EXTREME
SOUTHWEST TENNESSEE AND MUCH OF NORTH MISSISSIPPI. OVERNIGHT LOWS
IN THE MID AND UPPER 70S WILL PROVIDE LITTLE RELIEF FROM THE
HEAT. THIS INCLUDES MEMPHIS AND TUPELO.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A HEAT ADVISORY WILL REMAIN IN EFFECT THROUGH FRIDAY EVENING FOR
EAST CENTRAL ARKANSAS...EXTREME SOUTHWEST TENNESSEE AND MUCH OF
NORTH MISSISSIPPI. HEAT INDEX VALUES WILL AGAIN REACH 105 TO 107
DEGREES. THIS AREA INCLUDES MEMPHIS AND TUPELO.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION HAS BEEN REQUESTED ACROSS PORTIONS OF EAST
ARKANSAS AND THE MISSOURI BOOTHEEL UNTIL MIDNIGHT. PLEASE RELAY
ANY REPORTS OF SEVERE WEATHER OR FLOODING TO THE NATIONAL WEATHER
SERVICE OFFICE IN MEMPHIS.

JCL

In the hours before

Special weather statement, Aug 8, 6:37 PM CDT, 2 hours before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
637 PM CDT THU AUG 8 2013

ARZ028-TNZ048-090030-
MISSISSIPPI AR-LAUDERDALE TN-
637 PM CDT THU AUG 8 2013

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 730 PM CDT FOR...

  CENTRAL MISSISSIPPI COUNTY IN EASTERN ARKANSAS...
  WESTERN LAUDERDALE COUNTY IN SOUTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PEA SIZE HAIL OR LARGER AND WINDS AT
LEAST 40 MPH WAS LOCATED 5 MILES NORTHWEST OF OSCEOLA AT 638 PM
CDT...MOVING EAST AT 10 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING WILL
OCCUR WITH THIS  THUNDERSTORM.

PEOPLE IN LAUDERDALE AND MISSISSIPPI COUNTIES...INCLUDING LOCATIONS
NEAR FORT PILLOW STATE PARK...KEISER...LUXORA AND OSCEOLA...SHOULD
MONITOR THIS STORM CLOSELY. THIS SIGNIFICANT WEATHER ALERT ALSO
INCLUDES BIG LAKE.

.A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT FOR THE ADVISORY
AREA.

&&

LAT...LON 3593 8976 3563 8979 3555 9028 3582 9028
TIME...MOT...LOC 2338Z 275DEG 8KT 3577 9004
Special weather statement, Aug 8, 7:08 PM CDT, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
708 PM CDT THU AUG 8 2013

TNZ019-020-048-051-090100-
CROCKETT TN-DYER TN-GIBSON TN-LAUDERDALE TN-
708 PM CDT THU AUG 8 2013

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 800 PM CDT FOR...

  NORTHWESTERN CROCKETT COUNTY IN NORTHWEST TENNESSEE...
  SOUTHERN DYER COUNTY IN NORTHWEST TENNESSEE...
  WESTERN GIBSON COUNTY IN NORTHWEST TENNESSEE...
  NORTHEASTERN LAUDERDALE COUNTY IN SOUTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PEA SIZE HAIL OR LARGER AND WINDS AT
LEAST 40 MPH WAS LOCATED 4 MILES NORTH OF CHESTNUT BLUFF AT 708 PM
CDT...MOVING EAST AT 5 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING WILL
OCCUR WITH THIS  THUNDERSTORM.

PEOPLE IN CROCKETT...DYER...GIBSON AND LAUDERDALE COUNTIES...
INCLUDING LOCATIONS NEAR DYERSBURG...SHOULD MONITOR THIS STORM
CLOSELY.

&&

LAT...LON 3613 8902 3587 8900 3581 8935 3582 8940
      3580 8941 3578 8956 3603 8956
TIME...MOT...LOC 0008Z 275DEG 4KT 3592 8935
Special weather statement, Aug 8, 8:11 PM CDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
811 PM CDT THU AUG 8 2013

TNZ003-020-021-090145-
WEAKLEY TN-CARROLL TN-GIBSON TN-
811 PM CDT THU AUG 8 2013

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 845 PM CDT FOR...

  NORTHWESTERN CARROLL COUNTY IN NORTHWEST TENNESSEE...
  NORTHEASTERN GIBSON COUNTY IN NORTHWEST TENNESSEE...
  SOUTHERN WEAKLEY COUNTY IN NORTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PEA SIZE HAIL OR LARGER AND WINDS AT
LEAST 40 MPH WAS LOCATED 5 MILES EAST OF BRADFORD AT 812 PM CDT...
MOVING NORTHEAST AT 10 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING WILL
OCCUR WITH THIS  THUNDERSTORM.

PEOPLE IN CARROLL...GIBSON AND WEAKLEY COUNTIES SHOULD MONITOR THIS
STORM CLOSELY.

&&

LAT...LON 3629 8852 3628 8852 3628 8853 3619 8853
      3603 8854 3595 8884 3621 8894
TIME...MOT...LOC 0112Z 243DEG 9KT 3607 8873

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 7:08 PM CDTSpecial Weather StatementMEGDyer52 min
Aug 8, 8:05 PM CDTFlash Flood WarningMEGCarroll, Gibson, Weakley3 hr
Aug 8, 8:11 PM CDTSpecial Weather StatementMEGWeakley34 min
Aug 9, 11:00 AM CDTHeat AdvisoryMEGChester, Decatur, Fayette, Hardeman, Hardin, Haywood and 5 more9 hr
Aug 9, 4:11 PM CDTFlash Flood WarningMEGHardin2 hr
Aug 8, 10:51 PM CDTFlash Flood WarningMEGCalhoun, Pontotoc3 hr
Aug 8, 11:06 PM CDTSpecial Weather StatementMEGCalhoun24 min
Aug 9, 2:34 PM CDTFlash Flood WarningMEGLee3 hr
Aug 9, 3:42 PM CDTFlash Flood WarningMEGPrentiss3 hr
Aug 9, 4:27 PM CDTFlash Flood WarningMEGItawamba93 min
Aug 8, 11:22 PM CDTSpecial Weather StatementMEGCraighead38 min
Aug 8, 11:56 PM CDTFlash Flood WarningMEGCraighead, Lawrence3 hr
Aug 8, 11:56 PM CDTSpecial Weather StatementMEGCraighead, Greene34 min
Aug 9, 12:26 AM CDTFlash Flood WarningMEGClay, Greene3 hr

Nearby

Flash Flood Watches in Tennessee, 2013Flash Flood Watches in Arkansas, 2013Every flash flood watch 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.