Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 143, NWS Jackson, MS

September 29, 2012Franklin County, Lincoln County, Mississippi

NWS Jackson, MS issued this flash flood warning at Sep 29, 2012, 7:00 PM CDT for Franklin County, Lincoln County, 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: Sep 29, 2012, 7:00 PM CDT (00:00 UTC)
Expired: Sep 29, 2012, 9:00 PM CDT
In force: 2 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, MS, Lincoln County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 101 km from the middle of the area, began a volume at 00:04 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
Sep 29, 8:34 PM CDT	FLASH FLOOD	N Little Springs, MS	REPORTS OF WATER COVERING A BRIDGE ON LITTLE SPRINGS ROAD.

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 00:00Z, 0.0 hours before the alert went out and 102 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: 268 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -66 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

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

453 
WGUS54 KJAN 300000
FFWJAN
MSC037-085-300200-
/O.NEW.KJAN.FF.W.0143.120930T0000Z-120930T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
700 PM CDT SAT SEP 29 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LINCOLN COUNTY IN SOUTH CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF BROOKHAVEN...
  SOUTHEASTERN FRANKLIN COUNTY IN SOUTHWEST MISSISSIPPI...

* UNTIL 900 PM CDT

* AT 658 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED    
  VERY HEAVY RAIN MOVING VERY SLOWLY ACROSS THE WARNED AREA.         
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF THREE TO FIVE   
  INCHES...HAVE OCCURRED IN PORTIONS OF THE AREA OVER PAST SIX
  HOURS...PARTICULARLY SOUTHWEST OF BROOKHAVEN.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LITTLE SPRINGS...CENTER POINT...WEST LINCOLN...EAST LINCOLN AND
  ENTERPRISE

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 3134 9081 3165 9049 3167 9035 3154 9024
      3143 9025 3134 9042

$$

BYB

1 follow-up statement

832 
WGUS74 KJAN 300202
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
902 PM CDT SAT SEP 29 2012

MSC037-085-300211-
/O.EXP.KJAN.FF.W.0143.000000T0000Z-120930T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN MS-FRANKLIN MS-
902 PM CDT SAT SEP 29 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHEASTERN FRANKLIN AND
LINCOLN COUNTIES...

HEAVY RAIN IS SHIFTING EAST OF THE PREVIOUSLY WARNED AREA AND 
SIGNIFICANT PRECIPITATION ENDED QUITE A BIT EARLIER IN THOSE
LOCATIONS RECEIVING THE MOST RAINFALL. PREVIOUSLY HIGH WATER LEVELS
IN SMALL CREEKS AND STREAMS SHOULD BE RECEDING.  

LAT...LON 3134 9081 3165 9049 3167 9035 3154 9024
      3143 9025 3134 9042

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 4:19 PM CDT	Special Weather Statement	JAN	Carroll, Holmes, Humphreys, Leflore, Sharkey, Sunflower and 1 more	71 min
Sep 30, 5:52 PM CDT	Special Weather Statement	JAN	Lamar	28 min
Sep 30, 6:10 PM CDT	Flash Flood Warning	JAN	Leflore, Sunflower, Washington	3 hr
Sep 30, 6:33 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	66 min
Sep 30, 6:50 PM CDT	Special Weather Statement	JAN	Carroll, Grenada, Holmes, Humphreys, Issaquena, Leflore and 5 more	75 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; radar from the NEXRAD Level II archive.