Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 31, NWS Mobile, AL

August 30, 2012Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Aug 30, 2012, 7:18 AM CDT for Wayne County, Mississippi. It was in force for 6 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, 7:18 AM CDT (12:18 UTC)
Expired
Aug 30, 2012, 1:15 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Wayne County, MS

The radar

The Mobile radar (KMOB), 116 km from the middle of the area, began a volume at 12:20 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, 0.3 hours before the alert went out and 158 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 12:00Z on 2012-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jackson, MS at 12:00Z on 2012-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 473 square meters per square second.1939587897Sfc1 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
107 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
473 m²/s²
0-3 km storm-relative helicity
650 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

364 
WGUS54 KMOB 301218
FFWMOB
MSC153-301815-
/O.NEW.KMOB.FF.W.0031.120830T1218Z-120830T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
718 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 115 PM CDT

* AT 711 AM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER THE
  WARNED AREA AND RADAR ESTIMATES SHOW 3 TO 4 INCHES OF RAINFALL
  HAS OCCURRED OVER THE PAST 3 HOURS. THIS WILL LIKELY CAUSE FLASH
  FLOODING IN THE WARNED AREA. AN ADDITIONAL 1 TO 3 INCHES CAN BE
  EXPECTED OVER PORTIONS OF THE WARNED AREA OVER THE NEXT FEW HOURS.

* LOCATIONS IMPACTED INCLUDE...
  WAYNESBORO...         STATE LINE...         CLARA...
  BUCKATUNNA...

LAT...LON 3144 8846 3143 8877 3184 8879 3186 8863
      3189 8850 3189 8847

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 8:36 PM CDTFlash Flood WarningMOBGeorge, Greene, Perry, Stone6 hr
Aug 29, 9:42 PM CDTTornado WarningMOBGeorge, Greene, Perry48 min
Aug 29, 10:20 PM CDTRiver Flood WarningMOBGeorge, Greene, Perry9 days
Aug 29, 10:25 PM CDTTornado WarningMOBGreene, Perry, Wayne26 min
Aug 29, 11:20 PM CDTFlash Flood WarningMOBGreene, Perry, Wayne6 hr
Aug 30, 12:52 AM CDTWind AdvisoryMOBGeorge, Greene, Perry, Stone, Wayne16 hr
Aug 30, 2:13 AM CDTRiver Flood WarningMOBPerry22 hr
Aug 30, 2:28 AM CDTAreal Flood WarningMOBGeorge, Greene, Perry, Stone12 hr
Aug 30, 4:31 AM CDTTornado WarningMOBGreene, Wayne29 min
Aug 30, 4:37 AM CDTRiver Flood WarningMOBGeorge, Greene, Wayne9 days
Aug 30, 5:22 AM CDTTornado WarningMOBWayne23 min
Aug 30, 5:48 AM CDTTornado WarningMOBGreene, Wayne27 min
Aug 30, 6:28 AM CDTTornado WarningMOBWayne30 min
Aug 30, 7:07 AM CDTFlash Flood Warning EmergencyMOBGeorge6 hr
Aug 30, 7:23 AM CDTTornado WarningMOBWayne22 min
Aug 30, 7:41 AM CDTTornado WarningMOBGeorge33 min
Aug 30, 8:10 AM CDTTornado WarningMOBWayne35 min
Aug 30, 8:13 AM CDTTornado WarningMOBGreene, Wayne32 min
Aug 30, 8:45 AM CDTTornado WarningMOBGreene, Wayne45 min
Aug 30, 9:00 AM CDTFlash Flood Warning EmergencyMOBGreene6 hr
Aug 30, 10:17 AM CDTRiver Flood WarningMOBGeorge, Greene, Jackson9 days
Aug 30, 1:18 PM CDTAreal Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne20 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.