Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 113, NWS Jackson, MS

August 29, 2012Forrest County, Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 29, 2012, 10:57 AM CDT for Forrest County, Lamar County, Marion County, Mississippi. It was in force for 6 hr. 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: Aug 29, 2012, 10:57 AM CDT (15:57 UTC)
Expired: Aug 29, 2012, 5:00 PM CDT
In force: 6 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

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

What was reported inside it

Time	Report	Where	Remark
Aug 29, 3:15 PM CDT	FLASH FLOOD	4 Nnw Columbia, MS	WATER FLOODING A HOUSE IN THE EXPOSE COMMUNITY ...OCCUPANTS BEING EVACUATED
Aug 29, 4:35 PM CDT	FLASH FLOOD	Lumberton, MS	FLOODING WAS REPORTED ON HIGHWAY 11

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 12:00Z, 4.0 hours before the alert went out and 98 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: 625 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 465 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

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

297 
WGUS54 KJAN 291557
FFWJAN
MSC035-073-091-292200-
/O.NEW.KJAN.FF.W.0113.120829T1557Z-120829T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1057 AM CDT WED AUG 29 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 500 PM CDT WEDNESDAY

* AT 1055 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  RAINBANDS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  15 MILES SOUTH OF SANDY HOOK TO 20 MILES SOUTHEAST OF MAXIE...
  ALL THE WAY TO COAST...MOVING NORTHWEST AT 35 MPH. ESTIMATED 
  RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO THREE INCHES...
  HAVE OCCURRED IN THE PAST FOUR HOURS.

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

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
SIX HOURS WITH AN ADDITIONAL TWO TO FOUR INCHES POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF HIGHWAYS
AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE
BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO
FLOODING.

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.

CONTACT LOCAL LAW ENFORCEMENT AND THEY WILL RELAY FLOODING REPORTS TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN JACKSON.

&&

LAT...LON 3100 8935 3100 8941 3097 8944 3097 8947
      3101 8951 3100 8983 3107 8985 3107 8992
      3112 8995 3113 9000 3139 9004 3138 8981
      3143 8981 3143 8916 3140 8913 3091 8913
      3091 8934

$$

40/5

2 follow-up statements

160 
WGUS74 KJAN 291714
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1214 PM CDT WED AUG 29 2012

MSC035-073-091-292200-
/O.CON.KJAN.FF.W.0113.000000T0000Z-120829T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-FORREST MS-
1214 PM CDT WED AUG 29 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
FORREST...LAMAR AND MARION COUNTIES...

AT 1212 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
DETECT SQUALLS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING
FROM 6 MILES SOUTHEAST OF MAXIE TO 6 MILES WEST OF SANDY HOOK...
MOVING NORTH AT 35 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE
ORDER OF THREE TO FIVE INCHES...HAVE OCCURRED IN THE PAST 8 HOURS.

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

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
THREE TO FOUR HOURS...WITH AN ADDITIONAL TWO TO FOUR INCHES POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF HIGHWAYS
AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE
BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO
FLOODING.

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.

CONTACT LOCAL LAW ENFORCEMENT AND THEY WILL RELAY FLOODING REPORTS TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN JACKSON.

&&

LAT...LON 3100 8935 3100 8941 3097 8944 3097 8947
      3101 8951 3100 8983 3107 8985 3107 8992
      3112 8995 3113 9000 3139 9004 3138 8981
      3143 8981 3143 8916 3140 8913 3091 8913
      3091 8934

$$

40

605 
WGUS74 KJAN 292010
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
310 PM CDT WED AUG 29 2012

MSC035-073-091-292200-
/O.CON.KJAN.FF.W.0113.000000T0000Z-120829T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-FORREST MS-
310 PM CDT WED AUG 29 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
FORREST...LAMAR AND MARION COUNTIES...

AT 306 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
DETECT SQUALLS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING
FROM KOKOMO TO 9 MILES SOUTHEAST OF LUMBERTON...MOVING NORTHWEST AT 
45 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF FOUR TO 
SEVEN INCHES...HAVE OCCURRED SINCE MIDNIGHT. WATER HAS BEEN REPORTED
IN A FEW HOUSES IN GOSS LOCATED IN MARION COUNTY.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROCK
HILL...MCLAURIN...PINEBUR...BAXTERVILLE...SUNRISE...PURVIS...
MACEDONIA...PETAL...HATTIESBURG...WEST HATTIESBURG...RAWLS SPRINGS...
COLUMBIA...MORGANTOWN...SUMRALL...IMPROVE...BUNKER HILL AND GOSS

AN ADDITIONAL TWO TO FOUR INCHES POSSIBLE THROUGH 500 PM WITH THE 
HEAVIEST RAINBANDS...ESPECIALLY BETWEEN COLUMBIA AND PURVIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF HIGHWAYS
AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE
BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO
FLOODING.

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.

CONTACT LOCAL LAW ENFORCEMENT AND THEY WILL RELAY FLOODING REPORTS TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN JACKSON.

&&

LAT...LON 3092 8934 3101 8935 3101 8941 3098 8944
      3098 8947 3102 8951 3101 8983 3108 8985
      3108 8992 3113 8995 3114 9000 3139 9004
      3138 8981 3139 8981 3143 8981 3143 8916
      3140 8913 3092 8913

$$

40

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 9:09 PM CDT	River Flood Warning	JAN	Franklin	49 hr
Aug 29, 12:47 AM CDT	Special Weather Statement	JAN	Forrest, Lamar, Marion	38 min
Aug 29, 5:12 AM CDT	Tornado Warning	JAN	Forrest	18 min
Aug 29, 5:53 AM CDT	Tornado Warning	JAN	Forrest	22 min
Aug 29, 11:51 AM CDT	Special Weather Statement	JAN	Forrest, Lamar, Marion	59 min
Aug 29, 12:01 PM CDT	Special Weather Statement	JAN	Covington, Jefferson Davis, Lawrence	59 min
Aug 29, 2:16 PM CDT	Special Weather Statement	JAN	Forrest, Lamar, Marion	59 min
Aug 29, 3:38 PM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis, Lawrence, Lincoln	6 hr
Aug 29, 4:44 PM CDT	Wind Advisory	JAN	Attala, Bolivar, Clarke, Copiah, Hinds, Holmes and 17 more	23 hr
Aug 29, 4:46 PM CDT	Flash Flood Warning	JAN	Forrest, Jones, Lamar, Marion	5 hr
Aug 29, 5:17 PM CDT	Special Weather Statement	JAN	Forrest, Jefferson Davis, Lamar, Lawrence, Lincoln, Marion	58 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.