Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 155, NWS Jackson, MS

December 28, 20125 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Dec 28, 2012, 1:46 PM CST for 5 counties in Mississippi. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 28, 2012, 1:46 PM CST (19:46 UTC)
Expired: Dec 28, 2012, 3:45 PM CST
In force: 119 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Copiah County, MS, Jefferson Davis County, MS, Lawrence County, MS, Lincoln County, MS, Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 75 km from the middle of the area, began a volume at 19:46 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.8 hours before the alert went out and 75 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: 793 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 383 m²/s²
0-3 km storm-relative helicity: 375 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.

306 
WGUS54 KJAN 281946
FFWJAN
MSC029-065-077-085-127-282145-
/O.NEW.KJAN.FF.W.0155.121228T1946Z-121228T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
146 PM CST FRI DEC 28 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN COPIAH COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF HAZLEHURST...
  SOUTHERN SIMPSON COUNTY IN CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PINOLA...MAGEE...
  NORTHWESTERN JEFFERSON DAVIS COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  NORTHERN LAWRENCE COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  NORTHERN LINCOLN COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BROOKHAVEN...

* UNTIL 345 PM CST

* AT 145 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  MAGEE TO 11 MILES SOUTHWEST OF BROOKHAVEN...MOVING NORTHEAST AT 40 
  MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF ONE TO     
  TWO INCHES...HAVE ALREADY OCCURRED.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CASEYVILLE...ALLEN...SHIVERS...BARLOW...OMA...GLANCY...WESSON...
  MARTINSVILLE...ROCKPORT AND UNION

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
TWO HOURS WITH AN ADDITIONAL TWO 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 3151 9044 3162 9062 3162 9073 3184 9070
      3196 8966 3170 8980

$$



40

1 follow-up statement

204 
WGUS74 KJAN 282109
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
309 PM CST FRI DEC 28 2012

MSC029-065-077-085-127-282145-
/O.CON.KJAN.FF.W.0155.000000T0000Z-121228T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SIMPSON MS-LINCOLN MS-LAWRENCE MS-JEFFERSON DAVIS MS-COPIAH MS-
309 PM CST FRI DEC 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CST FOR
SOUTHERN COPIAH...NORTHWESTERN JEFFERSON DAVIS...NORTHERN LAWRENCE...
NORTHERN LINCOLN AND SOUTHERN SIMPSON COUNTIES...

AT 306 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT THUNDERSTORMS PRODUCING HEAVY TO MODERATE RAIN ACROSS THE 
WARNED AREA. ESTIMATED RADAR RAINFALL AMOUNTS HAVE TAPERED OFF TO 
NEAR AN INCH IN THE PAST HOUR.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SANATORIUM...PINOLA...SHIVERS...ROCKPORT...MARTINSVILLE...GLANCY...
ALLEN...BARLOW...OMA...HEBRON...UNION...MAGEE AND HAZLEHURST

HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT HOUR. 
WITH AN ADDITIONAL ONE INCH POSSIBLE. THE FLASH FLOOD WARNING WILL 
BE ALLOWED TO EXPIRE AT 345 PM.

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 3151 9044 3162 9062 3162 9073 3184 9070
      3196 8966 3170 8980

$$


7

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 28, 9:02 AM CST	Flash Flood Watch	JAN	Adams, Attala, Choctaw, Claiborne, Clarke, Clay and 30 more	11 hr
Dec 28, 3:37 PM CST	River Flood Warning	JAN	Copiah, Simpson	8 days
Dec 28, 3:37 PM CST	River Flood Warning	JAN	Lawrence	6 days
Dec 28, 4:40 PM CST	Special Weather Statement	JAN	Forrest, Lamar, Marion	2 hr
Dec 28, 5:23 PM CST	Special Weather Statement	JAN	Forrest	22 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; radar from the NEXRAD Level II archive.