Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 162, NWS Jackson, MS

December 26, 20114 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Dec 26, 2011, 8:25 AM CST for 4 counties in Mississippi. It was in force for 2 hr. 1 report 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: Dec 26, 2011, 8:25 AM CST (14:25 UTC)
Expired: Dec 26, 2011, 10:30 AM CST
In force: 2 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Covington County, MS, Jefferson Davis County, MS, Lamar County, MS, Marion County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 102 km from the middle of the area, began a volume at 14:26 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
Dec 26, 9:30 AM CST	FLASH FLOOD	Morgantown, MS	3 ROADS WERE UNDERWATER NEAR MORGANTOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.4 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-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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 457 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 164 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.

903 
WGUS54 KJAN 261425
FFWJAN
MSC031-065-073-091-261630-
/O.NEW.KJAN.FF.W.0162.111226T1425Z-111226T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
825 AM CST MON DEC 26 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN JEFFERSON DAVIS COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  NORTHERN MARION COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...KOKOMO...COLUMBIA...
  SOUTHEASTERN COVINGTON COUNTY IN SOUTHEAST MISSISSIPPI...
  NORTHWESTERN LAMAR COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 1030 AM CST

* AT 824 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED    
  A BAND OF SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS
  THE WARNED AREA. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF 
  TWO TO FOUR INCHES...HAVE OCCURRED IN THE PAST THREE HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SOCIETY HILL...SANFORD AND SUMRALL

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 3118 9003 3139 9004 3139 8996 3143 8996
      3165 8940 3144 8941 3143 8945 3133 8956

$$

AEG

2 follow-up statements

581 
WGUS74 KJAN 261532
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
932 AM CST MON DEC 26 2011

MSC031-065-073-091-261630-
/O.CON.KJAN.FF.W.0162.000000T0000Z-111226T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-JEFFERSON DAVIS MS-COVINGTON MS-
932 AM CST MON DEC 26 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM CST FOR
SOUTHEASTERN COVINGTON...SOUTHERN JEFFERSON DAVIS...NORTHWESTERN
LAMAR AND NORTHERN MARION COUNTIES...

AT 930 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT A BAND OF SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAINFALL 
OVER THE WARNED AREA. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE 
ORDER OF THREE TO FIVE INCHES...HAVE OCCURRED IN THE PAST THREE 
HOURS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
MELBA...SOCIETY HILL...SANFORD AND SUMRALL

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT 
ONE TO TWO HOURS...WITH AN ADDITIONAL ONE TO THREE INCHES POSSIBLE. 
THIS HEAVY RAINFALL IS LIKELY TO CAUSE FLOODING OF LOW LYING AND 
FLOOD PRONE AREAS...AS WELL AS POSSIBLY SMALL STREAMS IN THE AREA. 
ADDITIONAL WAVES OF HEAVY RAIN ARE LIKELY THROUGH TONIGHT WHICH MAY 
CAUSE ADDITIONAL FLOODING.

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 3118 9003 3139 9004 3139 8996 3143 8996
      3165 8940 3144 8941 3143 8945 3133 8956

$$

AEG

981 
WGUS74 KJAN 261626
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1026 AM CST MON DEC 26 2011

MSC031-065-073-091-261635-
/O.EXP.KJAN.FF.W.0162.000000T0000Z-111226T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MS-LAMAR MS-JEFFERSON DAVIS MS-COVINGTON MS-
1026 AM CST MON DEC 26 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1030 AM CST FOR
SOUTHEASTERN COVINGTON...SOUTHERN JEFFERSON DAVIS...NORTHWESTERN
LAMAR AND NORTHERN MARION COUNTIES...

THE HEAVIEST RAIN WAS FINALLY SHIFTING NORTH OF THE WARNING 
AREA...SO THE WARNING WILL BE ALLOWED TO EXPIRE AT 1030 AM. DOPPLER 
RADAR INDICATED THAT 3 TO 5 INCHES OF RAIN FELL OVER THE WARNED AREA 
THIS MORNING...AND THIS MAY HAVE CAUSE FLOODING ISSUES WHICH WILL 
ONLY SLOWLY RECEDE THROUGH EARLY AFTERNOON. 

ADDITIONAL HEAVY RAINFALL WILL BE POSSIBLE LATER THIS AFTERNOON AND 
THIS EVENING...AND THIS COULD CAUSE NEW FLOODING PROBLEMS THEN. A 
FLOOD WATCH IS IN EFFECT UNTIL MIDNIGHT.

LAT...LON 3118 9003 3139 9004 3139 8996 3143 8996
      3165 8940 3144 8941 3143 8945 3133 8956

$$

AEG

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 26, 8:04 AM CST	River Flood Warning	JAN	Neshoba	49 hr
Dec 26, 2:40 PM CST	Flash Flood Warning	JAN	Adams, Franklin	3 hr
Dec 26, 4:14 PM CST	Flash Flood Warning	JAN	Copiah, Lincoln	109 min

Nearby

Flash Flood Warnings in Mississippi, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.