Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 96, NWS Jackson, MS

August 3, 2012Covington County, Simpson County, Smith County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 3, 2012, 7:16 PM CDT for Covington County, Simpson County, Smith County, 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
Aug 3, 2012, 7:16 PM CDT (00:16 UTC)
Expired
Aug 3, 2012, 9:15 PM CDT
In force
119 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

Counties Covington County, MS, Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 67 km from the middle of the area, began a volume at 00:16 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, 0.3 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-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2397 joules per kilogram.LCLEL10008507005003002001001 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 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
2397 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1444 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

040 
WGUS54 KJAN 040016
FFWJAN
MSC031-127-129-040215-
/O.NEW.KJAN.FF.W.0096.120804T0016Z-120804T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
716 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN SIMPSON COUNTY IN CENTRAL MISSISSIPPI...
  SOUTHWESTERN SMITH COUNTY IN CENTRAL MISSISSIPPI...
  NORTHWESTERN COVINGTON COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 915 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN 8 MILES NORTH OF MOUNT
  OLIVE...OR NEAR MAGEE. THE STORMS WERE NEARLY STATIONARY. ESTIMATED
  RADAR RAINFALL AMOUNTS...ON THE ORDER OF TWO TO FOUR INCHES...HAVE
  OCCURRED IN THE PAST TWO HOURS.

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
HOUR 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 3170 8961 3168 8966 3170 8973 3187 8969
      3187 8960

$$

JA
1 follow-up statement
612 
WGUS74 KJAN 040108
FFSJAN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
808 PM CDT FRI AUG 3 2012

MSC031-127-129-040215-
/O.CON.KJAN.FF.W.0096.000000T0000Z-120804T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SMITH MS-SIMPSON MS-COVINGTON MS-
808 PM CDT FRI AUG 3 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR 
NORTHWESTERN COVINGTON...EXTREME SOUTHEASTERN SIMPSON AND EXTREME 
SOUTHWESTERN SMITH COUNTIES...

AT 808 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT THUNDERSTORMS PRODUCING HEAVY RAIN NEAR MOUNT OLIVE...OR 6 
MILES SOUTHEAST OF MAGEE...MOVING SOUTH AT 5 TO 10 MPH. ESTIMATED 
RADAR RAINFALL AMOUNTS...ON THE ORDER OF THREE TO FIVE INCHES...HAVE 
OCCURRED IN THE PAST THREE HOURS.

THE STORMS WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED COUNTIES.

HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT 
HOUR. WITH AN ADDITIONAL ONE TO TWO 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 3170 8961 3168 8966 3170 8973 3187 8969
      3187 8960

$$

JA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:39 PM CDTSpecial Weather StatementJANJones31 min
Aug 4, 2:48 PM CDTSpecial Weather StatementJANLamar27 min
Aug 4, 3:06 PM CDTSpecial Weather StatementJANMarion29 min
Aug 4, 3:55 PM CDTSpecial Weather StatementJANForrest30 min
Aug 4, 4:21 PM CDTSpecial Weather StatementJANCovington29 min
Aug 4, 4:50 PM CDTSpecial Weather StatementJANCovington30 min
Aug 4, 5:45 PM CDTSpecial Weather StatementJANLeake, Scott30 min
Aug 4, 6:04 PM CDTSpecial Weather StatementJANSmith31 min
Aug 4, 6:26 PM CDTSpecial Weather StatementJANNewton39 min
Aug 4, 6:34 PM CDTSpecial Weather StatementJANSimpson41 min
Aug 4, 6:36 PM CDTSpecial Weather StatementJANSmith29 min
Aug 4, 6:44 PM CDTSevere Thunderstorm WarningJANJasper, Newton32 min

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.