Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Jackson, MS

January 17, 2012Forrest County, Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 17, 2012, 6:00 PM CST for Forrest County, Lamar County, Marion County, Mississippi. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 17, 2012, 6:00 PM CST (00:00 UTC)
Expired: Jan 17, 2012, 8:00 PM CST
In force: 2 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Forrest County, MS, Lamar County, MS, Marion County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.0 hours before the alert went out and 100 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: 675 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

322 
WGUS54 KJAN 180000
FFWJAN
MSC035-073-091-180200-
/O.NEW.KJAN.FF.W.0003.120118T0000Z-120118T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
600 PM CST TUE JAN 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MARION COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...KOKOMO...SANDY HOOK...COLUMBIA...
  FORREST COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PETAL...HATTIESBURG...
  LAMAR COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF WEST HATTIESBURG...

* UNTIL 800 PM CST

* AT 559 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  10 MILES WEST OF KOKOMO TO WEST OF MCCOMB...MOVING EAST AT 50 MPH. 
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO THREE    
  INCHES...HAVE ALREADY OCCURRED FROM STORMS IN THE PAST TWO HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PICKWICK...PINEBUR...BAXTERVILLE...LUMBERTON...PURVIS...ROCK
  HILL...HOLLY SPRINGS...MCLAURIN...BROOKLYN...MORGANTOWN...GOSS...
  BUNKER HILL...IMPROVE...SUMRALL...RAWLS SPRINGS...SUNRISE AND
  MACEDONIA

REPEATED BURSTS OF HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA 
FOR THE NEXT ONE TO TWO HOURS WITH AN ADDITIONAL ONE TO THREE INCHES 
POSSIBLE ALONG WITH LIGHTNING STRIKES.

RAINFALL AMOUNTS OF TWO INCHES IN A HOUR CAN CAUSE FLOODING IN AND 
AROUND THE WESTERN PORTIONS OF HATTIESBURG IN NORTHEAST LAMAR 
COUNTY. SOME OF THE ROADS THAT FLOOD WITH THIS AMOUNT OF RAINFALL 
INCLUDE SAM RAYBURN ROAD...CLEARANCE RAY DRIVE...RUBY CIRCLE AND 
RAYBURN PLACE. IN ADDITION TO MANY OTHER LOCATIONS ALONG MIXON CREEK 
BEHIND TURTLE CREEK MALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE WATER
COVERS THE ROAD. FIND ALTERNATE ROUTES AND MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE WATER COVERS THE ROADWAY. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
ACTIONS SHOULD BE TAKEN IMMEDIATELY TO PROTECT LIFE AND PROPERTY.
NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. MOVE
TO HIGHER GROUND.

&&

LAT...LON 3097 8947 3101 8951 3100 8961 3103 8984
      3107 8985 3107 8992 3112 8995 3113 9002
      3132 9004 3139 9003 3139 8981 3143 8981
      3143 8915 3100 8914 3100 8941

$$

40

1 follow-up statement

895 
WGUS74 KJAN 180202
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
802 PM CST TUE JAN 17 2012

MSC035-073-091-180208-
/O.EXP.KJAN.FF.W.0003.000000T0000Z-120118T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-FORREST MS-
802 PM CST TUE JAN 17 2012

...THE FLASH FLOOD WARNING EXPIRES AT 800 PM CST FOR FORREST...LAMAR 
AND MARION COUNTIES...

THE AXIS OF HEAVIER RAINS HAS SHIFTED SOUTH IN THE PAST HOUR AND 
SHOULD REMAIN SOUTH OF A LUMBERTON TO BROOKLYN LINE THROUGH 900 
PM. ADDITIONAL RAINFALL AMOUNTS SHOULD BE LESS THAN ONE QUARTER 
INCH AS A COLD FRONT WAS POISED TO BLAST THROUGH THE REGION 
BETWEEN 10 PM AND MIDNIGHT. 

RAINFALL ESTIMATIONS OF 3 TO LOCALLY 4 INCHES WERE OBSERVED ON 
THE RADAR SINCE MID AFTERNOON. IF YOU EXPERIENCED ANY FLOODING 
PLEASE RELAY YOUR REPORTS TO LOCAL LAW ENFORCEMENT OR EMERGENCY 
MANAGEMENT.  

LAT...LON 3097 8947 3101 8951 3100 8961 3103 8984
      3107 8985 3107 8992 3112 8995 3113 9002
      3132 9004 3139 9003 3139 8981 3143 8981
      3143 8915 3100 8914 3100 8941

$$

40

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 17, 6:34 PM CST	Special Weather Statement	JAN	Clarke, Jasper, Kemper, Lauderdale, Newton, Rankin and 3 more	26 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; the sounding from the Mesonet's radiosonde archive.