Alert archive / Mississippi / Flash Flood Warnings in 2015

Flash Flood Warning 21, NWS New Orleans, LA

May 21, 20154 counties in Mississippi

NWS New Orleans, LA issued this flash flood warning at May 21, 2015, 5:05 PM CDT for 4 counties in Mississippi. It was in force for 115 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 21, 2015, 5:05 PM CDT (22:05 UTC)
Expired
May 21, 2015, 7:00 PM CDT
In force
115 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

Counties Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS

The radar

The Mobile radar (KMOB), 76 km from the middle of the area, began a volume at 22:05 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.1 hours before the alert went out and 73 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2015-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1839 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2015-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1839 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
619 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

787 
WGUS54 KLIX 212205
FFWLIX
MSC045-047-059-109-220000-
/O.NEW.KLIX.FF.W.0021.150521T2205Z-150522T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
505 PM CDT THU MAY 21 2015

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HARRISON COUNTY IN SOUTHEASTERN MISSISSIPPI...
  SOUTHEASTERN PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI...
  JACKSON COUNTY IN SOUTHERN MISSISSIPPI...
  NORTHEASTERN HANCOCK COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 700 PM CDT
    
* AT 503 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUING 
  TO MOVE ACROSS PORTIONS OF COASTAL MISSISSIPPI FROM JUST EAST OF 
  PICAYUNE TO NEAR VANCLEAVE. UP TO THREE INCHES OF RAIN HAS  
  ALREADY FALLEN WITH ADDITIONAL HEAVY RAIN LIKELY. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  GULFPORT...BILOXI...OCEAN SPRINGS...LONG BEACH...MOSS POINT...
  DIAMONDHEAD...ST. MARTIN...ESCATAWPA...GAUTIER...D'IBERVILLE...GULF
  HILLS...SAUCIER...WADE...LATIMER...GULF PARK ESTATES...LYMAN...
  KILN...VANCLEAVE...HICKORY HILLS AND GULFPORT AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3038 8854 3037 8879 3039 8879 3043 8885
      3043 8893 3042 8901 3041 8887 3037 8884
      3039 8894 3037 8909 3037 8933 3035 8960
      3080 8959 3079 8934 3065 8934 3065 8924
      3068 8924 3068 8889 3074 8888 3074 8853

$$
1 follow-up statement
061 
WGUS74 KLIX 212354
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
654 PM CDT THU MAY 21 2015

MSC045-047-059-109-220004-
/O.EXP.KLIX.FF.W.0021.000000T0000Z-150522T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HARRISON MS-PEARL RIVER MS-JACKSON MS-HANCOCK MS-
654 PM CDT THU MAY 21 2015

...THE FLASH FLOOD WARNING FOR HARRISON...SOUTHEASTERN PEARL RIVER...
JACKSON AND NORTHEASTERN HANCOCK COUNTIES WILL EXPIRE AT 700 PM
CDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 3038 8854 3037 8879 3039 8879 3043 8885
      3043 8893 3042 8901 3041 8887 3037 8884
      3039 8894 3037 8909 3037 8933 3035 8960
      3080 8959 3079 8934 3065 8934 3065 8924
      3068 8924 3068 8889 3074 8888 3074 8853

$$

MJH

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 11:47 PM CDTSpecial Weather StatementLIXWilkinson28 min
May 21, 1:04 PM CDTSpecial Weather StatementLIXAmite26 min
May 21, 1:35 PM CDTSpecial Weather StatementLIXAmite25 min
May 21, 1:49 PM CDTAreal Flood AdvisoryLIXAmite, Wilkinson3 hr
May 21, 1:59 PM CDTSpecial Weather StatementLIXAmite31 min
May 21, 2:00 PM CDTSpecial Weather StatementLIXWilkinson30 min
May 21, 2:08 PM CDTSevere Thunderstorm WarningLIXAmite, Pike37 min
May 21, 2:40 PM CDTSevere Thunderstorm WarningLIXPike35 min
May 21, 3:10 PM CDTSevere Thunderstorm WarningLIXPike, Walthall50 min
May 21, 3:36 PM CDTSevere Thunderstorm WarningLIXPearl River24 min
May 21, 4:24 PM CDTSpecial Weather StatementLIXHarrison36 min

Nearby

Flash Flood Warnings in Mississippi, 2015Every flash flood warning 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.