Alert archive / Mississippi / Flash Flood Warnings in 2018

Flash Flood Warning 2, NWS Mobile, AL

April 14, 2018Perry County, Stone County, Mississippi

NWS Mobile, AL issued this flash flood warning at Apr 14, 2018, 1:50 PM CDT for Perry County, Stone County, Mississippi. It was in force for 6 hr. 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 14, 2018, 1:50 PM CDT (18:50 UTC)
Expired: Apr 14, 2018, 7:45 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 94 km from the middle of the area, began a volume at 18:49 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, 6:17 PM CDT	FLASH FLOOD	Wiggins, MS	COUNTY EM REPORTS WATER COVERING ROADS IN WIGGINS AND ACROSS EASTERN PORTIONS OF STONE COUNTY

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, 6.8 hours before the alert went out and 81 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.

341 
WGUS54 KMOB 141850
FFWMOB
MSC111-131-150045-
/O.NEW.KMOB.FF.W.0002.180414T1850Z-180415T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Perry County in southeastern Mississippi...
  Stone County in southeastern Mississippi...

* Until 745 PM CDT.

* At 150 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to three inches of rain 
  have already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Wiggins, Perkinston and McHenry. 

LAT...LON 3091 8934 3091 8914 3104 8915 3112 8893
      3068 8909 3068 8924 3065 8924 3065 8934

$$

2 follow-up statements

524 
WGUS74 KMOB 142213
FFSMOB

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

MSC111-131-150045-
/O.CON.KMOB.FF.W.0002.000000T0000Z-180415T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-Stone MS-
513 PM CDT SAT APR 14 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHWESTERN PERRY AND STONE COUNTIES...

At 511 PM CDT, Doppler radar indicates that showers and occasional 
thunderstorms continue to move across the warned area, and 
additional heavy rain is possible.  Radar rainfall estimates show 
that 2.5 to 4 inches of rain has fallen over the area.  Flash 
flooding remains likely as additional thunderstorms move across the 
area through early this evening.

Some locations that will experience flooding include...
Wiggins, Perkinston and McHenry. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3091 8934 3091 8914 3104 8915 3112 8893
      3068 8909 3068 8924 3065 8924 3065 8934

$$

623 
WGUS74 KMOB 150038
FFSMOB

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

MSC111-131-150047-
/O.EXP.KMOB.FF.W.0002.000000T0000Z-180415T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Perry MS-Stone MS-
738 PM CDT SAT APR 14 2018

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN PERRY AND STONE COUNTIES
WILL EXPIRE AT 745 PM CDT...

The heavy rain has ended although light to moderate rain will 
continue over the area for a couple more hours.  The Flash Flood 
Warning will be replaced with an Areal Flood Warning due to water 
over several roadways in the area. Please heed any road closures.

LAT...LON 3091 8934 3091 8914 3104 8915 3112 8893
      3068 8909 3068 8924 3065 8924 3065 8934

$$

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, 1:54 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, 3:50 PM CDT	Flash Flood Warning	MOB	George, Greene, Perry, Stone	6 hr
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.