Alert archive / Mississippi / Flash Flood Warnings in 2018

Flash Flood Warning 6, NWS Mobile, AL

April 14, 20184 counties in Mississippi

NWS Mobile, AL issued this flash flood warning at Apr 14, 2018, 3:50 PM CDT for 4 counties in Mississippi. It was in force for 6 hr. 4 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: Apr 14, 2018, 3:50 PM CDT (20:50 UTC)
Expired: Apr 14, 2018, 9:45 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 58 km from the middle of the area, began a volume at 20:50 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 14, 5:33 PM CDT	HEAVY RAIN 4.28	1 Sw Leakesville, MS	RAWS SITE SOUTHWEST OF LEAKESVILLE MEASURED 4.28 INCHES OF RAIN
Apr 14, 7:23 PM CDT	FLASH FLOOD	4 Wsw Leakesville, MS	BROADCAST MEDIA RECORDED VIDEO OF WATER OVER PINE LEVEL ROAD SOUTHWEST OF LEAKESVILLE
Apr 14, 7:38 PM CDT	HEAVY RAIN 7.35	8 Ne Lucedale, MS	7.35 INCHES OF STORM TOTAL RAINFALL IN SOUTHEAST GREENE COUNTY
Apr 14, 8:03 PM CDT	FLASH FLOOD	Lucedale, MS	COUNTY EM REPORTED HWY 198 AT THE RAILROAD OVERPASS IS IMPASSIBLE DUE TO WATER. BILLY KNIGHT RD ALSO HAS 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.8 hours before the alert went out and 114 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: 1802 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 534 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

As transmitted.

289 
WGUS54 KMOB 142050
FFWMOB
MSC039-041-111-131-150245-
/O.NEW.KMOB.FF.W.0006.180414T2050Z-180415T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
350 PM CDT SAT APR 14 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  George County in southeastern Mississippi...
  Southeastern Perry County in southeastern Mississippi...
  Southern Greene County in southeastern Mississippi...
  Eastern Stone County in southeastern Mississippi...

* Until 945 PM CDT.

* At 349 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 2 to 2.25 inches of rain 
  have already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Lucedale, Leakesville and McLain. 

LAT...LON 3110 8893 3125 8844 3101 8843 3073 8869
      3073 8888 3068 8889 3068 8911

$$

1 follow-up statement

697 
WGUS74 KMOB 142346
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
646 PM CDT SAT APR 14 2018

MSC039-041-111-131-150245-
/O.CON.KMOB.FF.W.0006.000000T0000Z-180415T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
George MS-Perry MS-Greene MS-Stone MS-
646 PM CDT SAT APR 14 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
GEORGE...SOUTHEASTERN PERRY...SOUTHERN GREENE AND EASTERN STONE
COUNTIES...

At 644 PM CDT, Doppler radar indicates that showers and 
thunderstorms with heavy rain continue to move across much of the 
warned area.  Radar rainfall estimates show that 4 to over 7 inches 
of rain has fallen over the area. Flash flooding remains likely as 
additional thunderstorms move across the area through the mid 
evening hours.

Some locations that will experience flooding include...
Lucedale, Leakesville and McLain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3110 8893 3125 8844 3101 8843 3073 8869
      3073 8888 3068 8889 3068 8911

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 8:20 PM CDT	River Flood Warning	MOB	George, Greene, Jackson	14 hr
Apr 14, 3:19 AM CDT	Wind Advisory	MOB	George, Greene, Perry, Stone, Wayne	18 hr
Apr 14, 10:58 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Perry, Wayne	62 min
Apr 14, 11:50 AM CDT	Severe Thunderstorm Warning	MOB	Perry, Stone	55 min
Apr 14, 11:51 AM CDT	Areal Flood Advisory	MOB	Greene, Perry, Wayne	3 hr
Apr 14, 11:59 AM CDT	Severe Thunderstorm Warning	MOB	Greene, Wayne	61 min
Apr 14, 12:40 PM CDT	Special Weather Statement	MOB	Perry	50 min
Apr 14, 1:00 PM CDT	Areal Flood Advisory	MOB	Greene, Perry, Stone	3 hr
Apr 14, 1:50 PM CDT	Flash Flood Warning	MOB	Perry, Stone	6 hr
Apr 14, 1:54 PM CDT	Flash Flood Warning	MOB	Greene, Perry, Wayne	6 hr
Apr 14, 2:35 PM CDT	Flash Flood Warning	MOB	Greene, Wayne	6 hr
Apr 14, 3:47 PM CDT	Special Weather Statement	MOB	George	58 min
Apr 14, 5:05 PM CDT	Special Weather Statement	MOB	Stone	55 min
Apr 14, 6:03 PM CDT	Special Weather Statement	MOB	George, Greene	57 min
Apr 14, 6:57 PM CDT	Severe Thunderstorm Warning	MOB	George	20 min

Nearby

Flash Flood Warnings in Mississippi, 2018 Every flash flood warning in 2018

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.