Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 101, NWS Jackson, MS

July 16, 2011Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 16, 2011, 6:23 PM CDT for 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
Jul 16, 2011, 6:23 PM CDT (23:23 UTC)
Expired
Jul 16, 2011, 8:30 PM CDT
In force
2 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Lamar County, MS, Marion County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.4 hours before the alert went out and 115 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 2011-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1842 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2011-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 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
1842 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
486 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
7 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.

488 
WGUS54 KJAN 162323
FFWJAN
MSC073-091-170130-
/O.NEW.KJAN.FF.W.0101.110716T2323Z-110717T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
623 PM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MARION COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF COLUMBIA...
  LAMAR COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 830 PM CDT

* AT 623 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN NEAR COLUMBIA...MOVING
  SOUTHWEST AT 10 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE
  ORDER OF ONE TO THREE INCHES...HAVE OCCURRED IN THE PAST HOUR.
  EMERGENCY MANAGEMENT ALSO REPORTING SEVERAL ROADS FLOODED IN       
  COLUMBIA WITH SOME WATER THREATENING BUILDINGS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BAXTERVILLE...MORGANTOWN...PINEBUR...HOLLY SPRINGS AND PICKWICK

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3106 8971 3109 8993 3139 9001 3139 8997
      3139 8982 3142 8982 3143 8970 3143 8945
      3135 8945 3135 8940 3125 8935 3105 8935

$$

JC
2 follow-up statements
813 
WGUS74 KJAN 170029
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
729 PM CDT SAT JUL 16 2011

MSC073-091-170130-
/O.CON.KJAN.FF.W.0101.000000T0000Z-110717T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-
729 PM CDT SAT JUL 16 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHWESTERN LAMAR AND MARION COUNTIES...

AT 729 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN 11 MILES SOUTH OF
SUMRALL...OR 10 MILES WEST OF WEST HATTIESBURG...MOVING SOUTHWEST AT
10 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO
THREE INCHES...HAVE OCCURRED IN THE PAST TWO HOURS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUNKER
HILL...GOSS...MORGANTOWN...COLUMBIA...PICKWICK AND PINEBUR

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
HOUR. WITH AN ADDITIONAL ONE INCH POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3135 8945 3125 8943 3107 8961 3106 8971
      3109 8993 3137 8993 3139 8986 3139 8982
      3142 8982 3143 8970 3143 8945

$$

JC
725 
WGUS74 KJAN 170125
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
825 PM CDT SAT JUL 16 2011

MSC073-091-170135-
/O.EXP.KJAN.FF.W.0101.000000T0000Z-110717T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-
825 PM CDT SAT JUL 16 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 830 PM CDT FOR NORTHWESTERN
LAMAR AND MARION COUNTIES...

LIGHT RAIN WILL CONTINUE OVER THE WARNED AREA FOR ANOTHER 30 TO 45 
MINUTES. 

LAT...LON 3135 8945 3125 8943 3107 8961 3106 8971
      3109 8993 3137 8993 3139 8986 3139 8982
      3142 8982 3143 8970 3143 8945

$$

JC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 7:28 PM CDTSpecial Weather StatementJANLauderdale47 min
Jul 16, 5:12 PM CDTSpecial Weather StatementJANAdams48 min

Nearby

Flash Flood Warnings in Mississippi, 2011Every flash flood warning in 2011

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.