Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 82, NWS New Orleans, LA

September 5, 2012Jackson County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Sep 5, 2012, 6:22 AM CDT for Jackson County, Mississippi. It was in force for 83 min. 2 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: Sep 5, 2012, 6:22 AM CDT (11:22 UTC)
Expired: Sep 5, 2012, 7:45 AM CDT
In force: 83 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

County Jackson County, MS

The radar

The Mobile radar (KMOB), 58 km from the middle of the area, began a volume at 11:24 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
Sep 5, 6:30 AM CDT	FLASH FLOOD	Gulf Park Estates, MS	BROADCAST MEDIA REPORTED FLASH FLOODING FROM HEAVY RAINS IN THE GULF PARK ESTATES AREA.
Sep 5, 6:30 AM CDT	FLASH FLOOD	Ocean Springs, MS	OCEAN SPRINGS POLICE DEPARTMENT REPORTED FLASH FLOODING IN THE OCEAN SPRINGS AREA. THEY ALSO RELAYED TO US THAT THEY ARE GETTING CALLS TO ASSIST MOTORISTS AND ARE ENGAGED IN HIGH WATER RESCUES.

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 00:00Z, 11.4 hours before the alert went out and 94 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: 2069 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1149 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

165 
WGUS54 KLIX 051122
FFWLIX
MSC059-051245-
/O.NEW.KLIX.FF.W.0082.120905T1122Z-120905T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
622 AM CDT WED SEP 5 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL JACKSON COUNTY IN SOUTHERN MISSISSIPPI...
  THIS INCLUDES THE CITY OF OCEAN SPRINGS...

* UNTIL 745 AM CDT

* AT 619 AM CDT...THE PUBLIC REPORTED FLASH FLOODING FROM A
  THUNDERSTORM NEAR GULF PARK ESTATES...OR NEAR OCEAN SPRINGS...
  MOVING SOUTHWEST AT 5 MPH.

* THE STORM PRODUCING FLASH FLOODING WILL MAINLY IMPACT OCEAN        
  SPRINGS AND GULF PARK ESTATES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA. RADAR ESTIMATES THAT NEAR 6 INCHES OF RAIN HAS ALREADY 
FALLEN. 

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 3035 8865 3035 8867 3034 8870 3034 8875
      3037 8881 3040 8882 3040 8885 3045 8885
      3045 8862

$$

CAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 7:20 PM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison, Pearl River	40 min
Sep 4, 8:04 PM CDT	Severe Thunderstorm Warning	LIX	Pearl River	30 min

Nearby

Flash Flood Warnings in Mississippi, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.