Alert archive / Mississippi / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Mobile, AL

May 30, 2018Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at May 30, 2018, 8:14 PM CDT for Wayne County, Mississippi. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2018, 8:14 PM CDT (01:14 UTC)
Expired: May 30, 2018, 10:08 PM CDT
In force: 114 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Wayne County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 123 km from the middle of the area, began a volume at 01:17 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

Jackson, MS (KJAN), launched 00:00Z, 1.2 hours before the alert went out and 133 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: 1349 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1477 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

416 
WGUS54 KMOB 310114
FFWMOB
MSC153-310715-
/O.NEW.KMOB.FF.W.0013.180531T0114Z-180531T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
814 PM CDT WED MAY 30 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northwestern Wayne County in southeastern Mississippi...

* Until 215 AM CDT Thursday.

* At 813 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Flash flooding will remain over mainly rural areas of northwestern 
  Wayne County. This warning may be extended in area later depending 
  on this cluster of thunderstorms evolve.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3182 8894 3183 8888 3183 8876 3187 8858
      3174 8858 3171 8894

$$

1 follow-up statement

172 
WGUS74 KMOB 310308
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1008 PM CDT WED MAY 30 2018

MSC153-310316-
/O.CAN.KMOB.FF.W.0013.000000T0000Z-180531T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne MS-
1008 PM CDT WED MAY 30 2018

...THE FLASH FLOOD WARNING FOR NORTHWESTERN WAYNE COUNTY IS
CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed any remaining road closures. An 
Areal Flood Warning remains in effect for areas that received the 
heaviest rainfall earlier and as the event transitions into more of 
a general inundation flooding.  Please continue to heed any 
remaining road closures.

LAT...LON 3182 8894 3183 8888 3183 8876 3187 8858
      3174 8858 3171 8894

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:13 PM CDT	Special Weather Statement	MOB	Wayne	62 min
May 30, 7:30 PM CDT	Areal Flood Advisory	MOB	Wayne	3 hr
May 30, 8:40 PM CDT	Flash Flood Warning	MOB	Wayne	86 min
May 30, 9:48 PM CDT	Special Weather Statement	MOB	Perry	57 min
May 30, 10:00 PM CDT	Areal Flood Warning	MOB	Wayne	3 hr
May 30, 10:04 PM CDT	Areal Flood Warning	MOB	Wayne	3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.