Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 148, NWS Jackson, MS

October 1, 2012Attala County, Madison County, Mississippi

NWS Jackson, MS issued this flash flood warning at Oct 1, 2012, 12:29 AM CDT for Attala County, Madison 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
Oct 1, 2012, 12:29 AM CDT (05:29 UTC)
Expired
Oct 1, 2012, 2:30 AM CDT
In force
2 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Attala County, MS, Madison County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 87 km from the middle of the area, began a volume at 05:32 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 00:00Z, 5.5 hours before the alert went out and 85 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, Jackson, MS at 00:00Z on 2012-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1160 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2012-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 square meters per square second.193958Sfc1 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
1160 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
1.3
Supercell composite
10.6

Open this sounding in Storm Lab

The text

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

579 
WGUS54 KJAN 010529
FFWJAN
MSC007-089-010730-
/O.NEW.KJAN.FF.W.0148.121001T0529Z-121001T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1229 AM CDT MON OCT 1 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN ATTALA COUNTY IN CENTRAL MISSISSIPPI...
  NORTHEASTERN MADISON COUNTY IN CENTRAL MISSISSIPPI...

* UNTIL 230 AM CDT

* AT 1228 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED   
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN FROM NEAR CAMERON TO       
  HESTERVILLE MOVING NORTH REPEATEDLY ACROSS THE WARNED AREA.       
  ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO TO FOUR     
  INCHES...HAVE OCCURRED IN THE PAST TWO HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  POSSUMNECK

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 3328 8952 3293 8969 3293 8973 3286 8973
      3273 8991 3283 9000 3288 8996 3293 8990
      3300 8988 3307 8982 3311 8983 3313 8979
      3319 8978 3320 8975 3329 8970

$$

EEC
1 follow-up statement
408 
WGUS74 KJAN 010620
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
120 AM CDT MON OCT 1 2012

MSC089-010629-
/O.CAN.KJAN.FF.W.0148.000000T0000Z-121001T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON MS-
120 AM CDT MON OCT 1 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN
MADISON COUNTY...

THE HEAVY RAINFALL HAS ENDED OVER NORTHEASTERN MADISON COUNTY. 

LAT...LON 3328 8952 3293 8969 3293 8990 3300 8988
      3304 8983 3307 8982 3311 8983 3313 8979
      3319 8978 3320 8975 3329 8970

$$

MSC007-010730-
/O.CON.KJAN.FF.W.0148.000000T0000Z-121001T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATTALA MS-
120 AM CDT MON OCT 1 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
WESTERN ATTALA COUNTY...

AT 119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER WESTERN ATTLA 
COUNTY. THE STORMS WERE MOVING NORTH REPEATEDLY ACROSS THE WARNING 
AREA. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE ORDER OF THREE TO 
FIVE INCHES...HAVE OCCURRED IN THE PAST TWO HOURS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HESTERVILLE AND POSSUMNECK

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 3328 8952 3293 8969 3293 8990 3300 8988
      3304 8983 3307 8982 3311 8983 3313 8979
      3319 8978 3320 8975 3329 8970

$$

EEC

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 30, 7:37 PM CDTFlash Flood WarningJANHolmes, Humphreys, Issaquena, Sharkey, Warren, Yazoo3 hr
Sep 30, 8:55 PM CDTFlash Flood WarningJANCarroll, Grenada, Leflore3 hr
Sep 30, 9:22 PM CDTAreal Flood WarningJANSunflower, Washington4 hr

Nearby

Flash Flood Warnings in Mississippi, 2012Every 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.