Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 133, NWS Jackson, MS

August 30, 2012Forrest County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 30, 2012, 10:36 AM CDT for Forrest County, Mississippi. It was in force for 3 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
Aug 30, 2012, 10:36 AM CDT (15:36 UTC)
Expired
Aug 30, 2012, 1:15 PM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Flood severity
None

County Forrest County, MS

The radar

The Mobile radar (KMOB), 119 km from the middle of the area, began a volume at 15:40 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.6 hours before the alert went out and 110 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, Slidell Radar S, LA at 12:00Z on 2012-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2012-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 282 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
282 m²/s²
0-3 km storm-relative helicity
332 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.4

Open this sounding in Storm Lab

The text

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

968 
WGUS54 KJAN 301536
FFWJAN
MSC035-301815-
/O.NEW.KJAN.FF.W.0133.120830T1536Z-120830T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1036 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FORREST COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PETAL...HATTIESBURG...

* UNTIL 115 PM CDT

* AT 1035 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ALONG A LINE EXTENDING FROM
  9 MILES SOUTHWEST OF MAXIE TO 15 MILES SOUTH OF POPLARVILLE        
  MOVING NORTH AT 35 MPH. ESTIMATED RADAR RAINFALL AMOUNTS...ON THE  
  ORDER OF 10 TO 15 INCHES...HAVE OCCURRED ALREADY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BROOKLYN...MCLAURIN...ROCK HILL...SUNRISE...MACEDONIA AND RAWLS
  SPRINGS

VERY HEAVY RAINFALL WILL CONTINUE OVER THE WARNED AREA FOR THE NEXT
THREE HOURS WITH AN ADDITIONAL TWO TO THREE INCHES POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

CONTACT LOCAL LAW ENFORCEMENT AND THEY WILL RELAY FLOODING REPORTS TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN JACKSON.

&&

LAT...LON 3090 8933 3101 8936 3134 8935 3135 8944
      3142 8946 3143 8945 3142 8914 3092 8914

$$

40

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 8:06 PM CDTSpecial Weather StatementJANCovington, Forrest, Jefferson Davis, Lamar, Lawrence, Lincoln and 1 more54 min
Aug 29, 9:28 PM CDTFlash Flood WarningJANCovington, Forrest, Jones, Lamar6 hr
Aug 29, 9:35 PM CDTFlash Flood WarningJANJefferson Davis, Lawrence, Lincoln, Marion6 hr
Aug 29, 10:15 PM CDTFlash Flood WarningJANJefferson Davis, Lawrence, Lincoln, Marion5 hr
Aug 29, 11:13 PM CDTSpecial Weather StatementJANCopiah, Hinds, Jasper, Jones, Rankin, Simpson and 1 more57 min
Aug 30, 12:23 AM CDTFlash Flood WarningJANJasper, Smith6 hr
Aug 30, 2:05 AM CDTFlash Flood WarningJANCopiah, Simpson6 hr
Aug 30, 2:10 AM CDTRiver Flood WarningJANJones6 days
Aug 30, 2:52 AM CDTFlash Flood WarningJANClarke6 hr
Aug 30, 2:55 AM CDTTornado WarningJANClarke, Jasper29 min
Aug 30, 3:21 AM CDTFlash Flood Warning EmergencyJANCovington, Forrest, Jones, Lamar6 hr
Aug 30, 3:23 AM CDTFlash Flood WarningJANJefferson Davis, Lawrence, Marion112 min
Aug 30, 3:29 AM CDTFlash Flood WarningJANFranklin, Lincoln6 hr
Aug 30, 5:06 AM CDTTornado WarningJANClarke, Lauderdale24 min
Aug 30, 5:07 AM CDTFlash Flood WarningJANJefferson Davis, Lamar, Lawrence, Marion4 hr
Aug 30, 5:45 AM CDTTornado WarningJANClarke, Lauderdale45 min
Aug 30, 6:40 AM CDTTornado WarningJANNeshoba, Newton23 min
Aug 30, 6:52 AM CDTTornado WarningJANClarke, Lauderdale53 min
Aug 30, 7:21 AM CDTFlash Flood WarningJANLauderdale, Newton6 hr
Aug 30, 7:35 AM CDTFlash Flood WarningJANHinds, Rankin6 hr
Aug 30, 7:37 AM CDTTornado WarningJANClarke29 min
Aug 30, 7:41 AM CDTTornado WarningJANKemper, Lauderdale, Neshoba, Newton27 min
Aug 30, 8:09 AM CDTFlash Flood WarningJANCopiah, Simpson5 hr
Aug 30, 8:29 AM CDTTornado WarningJANClarke46 min
Aug 30, 8:37 AM CDTFlash Flood WarningJANClarke5 hr
Aug 30, 8:57 AM CDTFlash Flood WarningJANLamar, Marion4 hr
Aug 30, 9:10 AM CDTTornado WarningJANCovington, Forrest, Jones, Lamar36 min
Aug 30, 9:14 AM CDTFlash Flood WarningJANCovington, Jefferson Davis, Lawrence4 hr
Aug 30, 9:36 AM CDTTornado WarningJANClarke39 min
Aug 30, 9:41 AM CDTFlash Flood WarningJANLincoln4 hr
Aug 30, 10:12 AM CDTRiver Flood WarningJANAttala, Holmes12 hr
Aug 30, 10:14 AM CDTTornado WarningJANClarke, Lauderdale46 min
Aug 30, 10:21 AM CDTRiver Flood WarningJANCovington, Forrest47 hr
Aug 30, 10:24 AM CDTRiver Flood WarningJANClarke34 hr
Aug 30, 10:54 AM CDTRiver Flood WarningJANLeake10 hr
Aug 30, 11:28 AM CDTFlash Flood WarningJANJones107 min
Aug 30, 11:30 AM CDTRiver Flood WarningJANCopiah, Simpson10 hr
Aug 30, 11:30 AM CDTRiver Flood WarningJANLawrence4 days
Aug 30, 11:30 AM CDTRiver Flood WarningJANMarion56 hr
Aug 30, 11:30 AM CDTRiver Flood WarningJANSimpson10 hr
Aug 30, 12:37 PM CDTAreal Flood WarningJANCovington, Forrest, Jefferson Davis, Jones, Lamar, Lawrence and 1 more12 hr
Aug 30, 12:57 PM CDTAreal Flood WarningJANCopiah, Hinds, Lincoln, Rankin, Simpson12 hr
Aug 30, 1:38 PM CDTTornado WarningJANKemper, Lauderdale34 min
Aug 30, 3:37 PM CDTFlash Flood WarningJANForrest, Lamar5 hr
Aug 30, 4:53 PM CDTFlash Flood WarningJANWashington112 min
Aug 30, 4:57 PM CDTFlash Flood WarningJANJones3 hr
Aug 30, 5:16 PM CDTTornado WarningJANForrest14 min
Aug 30, 6:25 PM CDTAreal Flood WarningJANLauderdale8 hr
Aug 30, 6:39 PM CDTFlash Flood WarningJANBolivar, Washington111 min
Aug 30, 6:50 PM CDTSpecial Weather StatementJANClaiborne, Warren45 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.