Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 48, NWS New Orleans, LA

August 15, 2012Jackson County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Aug 15, 2012, 5:04 AM CDT for Jackson County, Mississippi. It was in force for 80 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
Aug 15, 2012, 5:04 AM CDT (10:04 UTC)
Expired
Aug 15, 2012, 6:24 AM CDT
In force
80 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

County Jackson County, MS

The radar

The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 10:03 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 00:00Z, 10.1 hours before the alert went out and 109 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 00:00Z on 2012-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3129 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 00:00Z on 2012-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939Sfc1 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
3129 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
929 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

541 
WGUS54 KLIX 151004
FFWLIX
MSC059-151300-
/O.NEW.KLIX.FF.W.0048.120815T1004Z-120815T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
504 AM CDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN JACKSON COUNTY IN SOUTHERN MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PASCAGOULA...OCEAN SPRINGS...MOSS
  POINT...ESCATAWPA...

* UNTIL 800 AM CDT

* AT 456 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  VERY HEAVY RAIN FROM A NEARLY STATIONARY LINE OF THUNDERSTORMS     
  CONTINUING OVER SOUTHERN JACKSON COUNTY BETWEEN INTERSTATE 10 AND  
  THE COAST...MAINLY FROM OCEAN SPRINGS EASTWARD. UP TO 2 INCHES OF  
  RAIN HAS ALREADY OCCURRED IN THIS AREA. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GULF PARK
  ESTATES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 INCHES OR MORE IS POSSIBLE IN THE 
WARNED AREA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3034 8840 3035 8843 3031 8847 3031 8850
      3033 8852 3033 8857 3036 8862 3034 8874
      3037 8881 3042 8887 3042 8888 3054 8840
      3035 8839

$$
1 follow-up statement
613 
WGUS74 KLIX 151124
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
624 AM CDT WED AUG 15 2012

MSC059-151132-
/O.CAN.KLIX.FF.W.0048.000000T0000Z-120815T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON MS-
624 AM CDT WED AUG 15 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN JACKSON
COUNTY...

RAINFALL HAS DIMINISHED CONSIDERABLY SOUTH OF INTERSTATE 10 SINCE 6 
AM. NO FLOODING HAS BEEN REPORTED OVER SOUTHERN JACKSON COUNTY AND 
ADDITIONAL HEAVY RAIN IS NOT EXPECTED AT THIS TIME.

LAT...LON 3034 8840 3035 8843 3031 8847 3031 8850
      3033 8852 3033 8857 3036 8862 3034 8874
      3037 8881 3042 8887 3042 8888 3054 8840
      3035 8839

$$

Nearby

Flash Flood Warnings in Mississippi, 2012Every flash flood warning in 2012

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.