Alert archive / Tennessee / Areal Flood Advisories in 2015

Areal Flood Advisory 21, NWS Memphis, TN

August 19, 2015Crockett County, Dyer County, Lauderdale County, Tennessee; Mississippi County, Arkansas

NWS Memphis, TN issued this areal flood advisory at Aug 19, 2015, 12:06 PM CDT for Crockett County, Dyer County, Lauderdale County, Tennessee; Mississippi County, Arkansas. It was in force for 114 min.

The area

The counties it named.

The facts

Issued: Aug 19, 2015, 12:06 PM CDT (17:06 UTC)
Expired: Aug 19, 2015, 2:00 PM CDT
In force: 114 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

Counties Mississippi County, AR, Crockett County, TN, Dyer County, TN, Lauderdale County, TN

The radar

The Memphis radar (KNQA), 63 km from the middle of the area, began a volume at 17:06 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 12:00Z, 5.1 hours before the alert went out and 119 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: 1515 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at Aug 18, 6:41 PM CDT, 17 hours 25 minutes earlier.

Area forecast discussion, Aug 18, 6:41 PM CDT, 17 hours 25 minutes before

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Hazardous weather outlook, Aug 18, 3:40 PM CDT, 20 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MEMPHIS TN
340 PM CDT TUE AUG 18 2015

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>022-048>055-088>092-191045-
ALCORN-BENTON MS-BENTON TN-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-
340 PM CDT TUE AUG 18 2015

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE
MID SOUTH ON WEDNESDAY...ESPECIALLY WEDNESDAY AFTERNOON INTO
WEDNESDAY EVENING. DAMAGING WINDS WILL BE THE PRIMARY THREAT FOR ANY
THUNDERSTORMS WHICH REACH SEVERE LIMITS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED WEDNESDAY AFTERNOON INTO WEDNESDAY
EVENING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 3:09 PM CDT	Special Weather Statement	MEG	Chickasaw	36 min
Aug 19, 10:37 AM CDT	Areal Flood Advisory	MEG	Haywood, Lauderdale, Tipton	113 min
Aug 19, 4:50 PM CDT	Areal Flood Advisory	MEG	Madison	55 min
Aug 19, 9:28 AM CDT	Areal Flood Advisory	MEG	Craighead, Cross, Lawrence, Poinsett	2 hr

Nearby

Areal Flood Advisories in Tennessee, 2015 Areal Flood Advisories in Arkansas, 2015 Every areal flood advisory in 2015

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.