Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 79, NWS Memphis, TN

August 31, 2017Benton County, Marshall County, Tippah County, Mississippi; Fayette County, Hardeman County, Tennessee

NWS Memphis, TN issued this flash flood warning at Aug 31, 2017, 2:36 PM CDT for Benton County, Marshall County, Tippah County, Mississippi; Fayette County, Hardeman County, Tennessee. It was in force for 9 hr. 3 reports 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: Aug 31, 2017, 2:36 PM CDT (19:36 UTC)
Expired: Aug 31, 2017, 11:30 PM CDT
In force: 9 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Benton County, MS, Marshall County, MS, Tippah County, MS, Fayette County, TN, Hardeman County, TN

The radar

The Memphis radar (KNQA), 85 km from the middle of the area, began a volume at 19:36 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
Aug 31, 4:40 PM CDT	HEAVY RAIN 0	W Williston, TN	5.32 INCHES IN 5 HOURS.
Aug 31, 4:40 PM CDT	HEAVY RAIN 5.32	W Williston, TN	5.32 INCHES IN 5 HOURS.
Aug 31, 7:00 PM CDT	HEAVY RAIN 0	Williston, TN	7.84 INCHES OF RAIN SINCE 11 AM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 7.6 hours before the alert went out and 80 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: 20 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 525 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

009 
WGUS54 KMEG 311936
FFWMEG
MSC009-093-139-TNC047-069-312230-
/O.NEW.KMEG.FF.W.0079.170831T1936Z-170831T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
236 PM CDT THU AUG 31 2017

The National Weather Service in Memphis has issued a

* Flash Flood Warning for...
  Northeastern Marshall County in northwestern Mississippi...
  Tippah County in northeastern Mississippi...
  Benton County in northeastern Mississippi...
  Fayette County in western Tennessee...
  Southwestern Hardeman County in western Tennessee...

* Until 530 PM CDT

* At 236 PM CDT...Doppler Radar estimates up to 2 inches of rain has 
  occurred over the past 2 hours. Showers and thunderstorms will 
  produce an additional 1 to 3 inches of rain over the next 3 hours.

* Some locations that will experience flooding include...
  Ripley, Lamar, Somerville, Blue Mountain, Snow Lake Shores,
  Michigan City, Canaan, Lagrange, Gravestown, Slayden, Warren,
  Macon, Oakland, Piperton, Walnut, Gallaway, Rossville, Ashland,
  Moscow and Falkner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3461 8908 3491 8937 3500 8964 3538 8963
      3539 8960 3520 8904 3490 8882 3486 8882
      3486 8879 3481 8875 3476 8875 3475 8873

$$

1 follow-up statement

878 
WGUS54 KMEG 312216
FFWMEG
MSC009-093-139-TNC047-069-010430-
/O.EXT.KMEG.FF.W.0079.000000T0000Z-170901T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Memphis TN
516 PM CDT THU AUG 31 2017

The National Weather Service in Memphis has extended the

* Flash Flood Warning for...
  Northeastern Marshall County in northwestern Mississippi...
  Tippah County in northeastern Mississippi...
  Benton County in northeastern Mississippi...
  Fayette County in western Tennessee...
  Southwestern Hardeman County in western Tennessee...

* Until 1130 PM CDT Thursday

* At 515 PM CDT...Doppler Radar estimates 4 to 6 inches of rain has
  occurred over the past 3 hours. Showers and thunderstorms will
  produce an additional 2 to 4 inches of rain over the next 6 hours.

* Some locations that will experience flooding include...
  Ripley, Lamar, Somerville, Blue Mountain, Snow Lake Shores,
  Michigan City, Canaan, Lagrange, Gravestown, Slayden, Warren,
  Macon, Oakland, Piperton, Walnut, Gallaway, Rossville, Ashland,
  Moscow and Falkner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3461 8908 3491 8937 3500 8964 3538 8963
      3539 8960 3520 8904 3490 8882 3486 8882
      3486 8879 3481 8875 3476 8875 3475 8873

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 9:45 AM CDT	Special Weather Statement	MEG	Tate	30 min
Aug 31, 9:53 AM CDT	Tornado Warning	MEG	Tate	18 min
Aug 31, 10:17 AM CDT	Special Weather Statement	MEG	Tunica	43 min
Aug 31, 10:31 AM CDT	Special Weather Statement	MEG	Yalobusha	44 min
Aug 31, 10:37 AM CDT	Severe Thunderstorm Warning	MEG	Panola, Yalobusha	23 min
Aug 31, 10:51 AM CDT	Tornado Warning	MEG	Chickasaw, Lee, Pontotoc	39 min
Aug 31, 10:55 AM CDT	Severe Thunderstorm Warning	MEG	Panola, Yalobusha	50 min
Aug 31, 11:09 AM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Marshall	38 min
Aug 31, 11:21 AM CDT	Tornado Warning	MEG	Benton, Tippah, Union	39 min
Aug 31, 11:22 AM CDT	Tornado Warning	MEG	Benton	53 min
Aug 31, 11:24 AM CDT	Tornado Warning	MEG	Panola	51 min
Aug 31, 11:29 AM CDT	Tornado Warning	MEG	Lee, Pontotoc, Union	31 min
Aug 31, 11:36 AM CDT	Tornado Warning	MEG	Panola, Quitman, Tate, Tunica	39 min
Aug 31, 11:40 AM CDT	Tornado Warning	MEG	Calhoun, Chickasaw	35 min
Aug 31, 11:57 AM CDT	Tornado Warning	MEG	Tate	48 min
Aug 31, 11:58 AM CDT	Tornado Warning	MEG	Benton, Pontotoc, Tippah, Union	32 min
Aug 31, 12:01 PM CDT	Tornado Warning	MEG	Benton, Marshall	44 min
Aug 31, 12:03 PM CDT	Tornado Warning	MEG	Benton, Tippah	42 min
Aug 31, 12:14 PM CDT	Tornado Warning	MEG	Calhoun, Chickasaw, Lafayette, Pontotoc	31 min
Aug 31, 12:31 PM CDT	Tornado Warning	MEG	Benton, Tippah, Union	29 min
Aug 31, 12:33 PM CDT	Tornado Warning	MEG	Panola, Tate, Tunica	42 min
Aug 31, 12:44 PM CDT	Tornado Warning	MEG	Lafayette, Pontotoc, Union	31 min
Aug 31, 12:49 PM CDT	Tornado Warning	MEG	DeSoto	41 min
Aug 31, 12:55 PM CDT	Tornado Warning	MEG	Benton, Tippah	50 min
Aug 31, 1:02 PM CDT	Flash Flood Warning	MEG	Panola, Quitman, Tate, Tunica	6 hr
Aug 31, 1:07 PM CDT	Tornado Warning	MEG	Itawamba, Lee	38 min
Aug 31, 1:07 PM CDT	Tornado Warning	MEG	Lee, Pontotoc, Union	38 min
Aug 31, 1:23 PM CDT	Tornado Warning	MEG	Prentiss	52 min
Aug 31, 1:24 PM CDT	Flash Flood Warning	MEG	DeSoto	3 hr
Aug 31, 1:37 PM CDT	Tornado Warning	MEG	Lee, Prentiss, Tippah, Union	38 min
Aug 31, 1:57 PM CDT	Tornado Warning	MEG	Alcorn	18 min
Aug 31, 2:02 PM CDT	Tornado Warning	MEG	Tippah	43 min
Aug 31, 2:12 PM CDT	Tornado Warning	MEG	Chickasaw, Pontotoc	28 min
Aug 31, 2:26 PM CDT	Tornado Warning	MEG	Tishomingo	34 min
Aug 31, 2:51 PM CDT	Flash Flood Warning	MEG	Lafayette, Marshall	3 hr
Aug 31, 3:15 PM CDT	Flash Flood Warning	MEG	DeSoto, Lafayette, Marshall, Panola, Tate	3 hr
Aug 31, 3:31 PM CDT	Flash Flood Warning	MEG	Benton, DeSoto, Marshall	9 hr
Aug 31, 4:32 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Prentiss, Tippah	28 min
Aug 31, 4:43 PM CDT	Flash Flood Warning	MEG	DeSoto	6 hr
Aug 31, 4:59 PM CDT	Severe Thunderstorm Warning	MEG	Alcorn, Prentiss, Tippah	26 min
Aug 31, 5:45 PM CDT	Flash Flood Warning	MEG	Coahoma, DeSoto, Lafayette, Marshall, Panola, Quitman and 2 more	6 hr
Aug 30, 9:13 PM CDT	River Flood Warning	MEG	Hardeman	62 hr
Aug 31, 8:22 AM CDT	Flash Flood Warning	MEG	Dyer, Lauderdale	3 hr
Aug 31, 12:43 PM CDT	Tornado Warning	MEG	Fayette, Hardeman	47 min
Aug 31, 1:49 PM CDT	Tornado Warning	MEG	Fayette, Hardeman	41 min
Aug 31, 2:47 PM CDT	Tornado Warning	MEG	Hardin, McNairy	43 min
Aug 31, 3:08 PM CDT	Flash Flood Warning	MEG	Shelby	9 hr
Aug 31, 3:10 PM CDT	Tornado Warning Tornado observed	MEG	Hardin, McNairy	32 min
Aug 31, 3:23 PM CDT	Tornado Warning	MEG	Decatur	52 min
Aug 31, 3:26 PM CDT	Tornado Warning	MEG	Chester, McNairy	25 min
Aug 31, 3:29 PM CDT	Tornado Warning	MEG	Hardeman	16 min
Aug 31, 5:21 PM CDT	Flash Flood Warning	MEG	Chester, Fayette, Hardeman, Hardin, Haywood, Henderson and 3 more	6 hr
Aug 31, 6:08 PM CDT	Flash Flood Warning	MEG	Benton, Carroll, Chester, Decatur, Hardin, Henderson and 1 more	6 hr

Nearby

Flash Flood Warnings in Mississippi, 2017 Flash Flood Warnings in Tennessee, 2017 Every flash flood warning in 2017

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.