Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 4, NWS Mobile, AL

March 5, 2011Greene County, Perry County, Wayne County, Mississippi; Choctaw County, Washington County, Alabama

NWS Mobile, AL issued this flash flood warning at Mar 5, 2011, 3:23 PM CST for Greene County, Perry County, Wayne County, Mississippi; Choctaw County, Washington County, Alabama. 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
Mar 5, 2011, 3:23 PM CST (21:23 UTC)
Expired
Mar 5, 2011, 6:51 PM CST
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Choctaw County, AL, Washington County, AL, Greene County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 119 km from the middle of the area, began a volume at 21:23 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, 9.4 hours before the alert went out and 143 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 2011-03-05Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2011-03-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 368 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
582 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
368 m²/s²
0-3 km storm-relative helicity
426 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

846 
WGUS54 KMOB 052123
FFWMOB
ALC023-129-MSC041-111-153-060115-
/O.NEW.KMOB.FF.W.0004.110305T2123Z-110306T0115Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
323 PM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN GREENE COUNTY IN SOUTHEAST MISSISSIPPI...
  PERRY COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF RICHTON...
  WAYNE COUNTY IN SOUTHEAST MISSISSIPPI...
  THIS INCLUDES THE CITY OF WAYNESBORO...
  SOUTHWESTERN CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN WASHINGTON COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 715 PM CST

* AT 318 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED THAT 3
  TO 4 INCHES OF RAIN HAS FALLEN OVER THE WARNED AREA SINCE NOON. 
  SOIL CONDITIONS ARE SATURATED DUE TO THIS HEAVY RAINFALL AND
  ADDITIONAL RAINFALL FROM EARLIER THIS MORNING.  AN ADDITIONAL 1 TO
  2 INCHES OF RAIN WILL FALL OVER THE AREA AS SHOWERS AND
  THUNDERSTORMS CONTINUE TO BRING HEAVY RAINS TO THE AREA.  DUE TO
  SATURATED SOIL CONDITIONS...THIS WILL RESULT IN FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROBINSON
  JUNCTION...SILAS...NEEDHAM...GILBERTOWN AND MILLRY

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3144 8912 3144 8893 3180 8893 3184 8883
      3184 8871 3189 8848 3200 8847 3206 8832
      3162 8829 3094 8913 3141 8913

$$
1 follow-up statement
968 
WGUS74 KMOB 060051
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
651 PM CST SAT MAR 5 2011

ALC023-129-MSC041-111-153-060100-
/O.CAN.KMOB.FF.W.0004.000000T0000Z-110306T0115Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AL-CHOCTAW AL-PERRY MS-GREENE MS-WAYNE MS-
651 PM CST SAT MAR 5 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WAYNE...
NORTHWESTERN GREENE...PERRY...SOUTHWESTERN CHOCTAW AND NORTHWESTERN
WASHINGTON COUNTIES...

AT 650 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATES THAT THE 
RAINS THAT PROMPTED THE WARNING HAVE ENDED FOR A SUFFICIENTLY LONG 
TIME TO ALLOW FOR THE EXCESSIVE RAINFALL TO RUNOFF AND SWOLLEN 
CREEKS AND STREAMS TO SUBSIDE.


LAT...LON 3144 8912 3144 8893 3180 8893 3184 8883
      3184 8871 3189 8848 3200 8847 3206 8832
      3162 8829 3094 8913 3141 8913

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 5, 9:15 AM CSTSevere Thunderstorm WarningMOBGeorge, Perry, Stone26 min
Mar 5, 9:26 AM CSTAreal Flood AdvisoryMOBStone2 hr
Mar 5, 10:04 AM CSTTornado WarningMOBGreene, Perry41 min
Mar 5, 10:42 AM CSTFlash Flood WarningMOBPerry2 hr
Mar 5, 10:46 AM CSTTornado WarningMOBGreene44 min
Mar 5, 11:26 AM CSTAreal Flood AdvisoryMOBGreene2 hr
Mar 5, 11:54 AM CSTSevere Thunderstorm WarningMOBGreene50 min
Mar 5, 11:58 AM CSTAreal Flood AdvisoryMOBGreene2 hr
Mar 5, 12:50 PM CSTFlash Flood WarningMOBGreene, Perry3 hr
Mar 5, 1:16 PM CSTFlash Flood WatchMOBGeorge, Greene, Perry, Stone, Wayne6 hr
Mar 5, 1:39 PM CSTAreal Flood AdvisoryMOBGreene, Perry, Wayne2 hr
Mar 5, 2:50 PM CSTFlash Flood WarningMOBStone4 hr
Mar 5, 3:48 PM CSTFlash Flood WarningMOBGreene, Perry3 hr
Mar 5, 4:17 PM CSTAreal Flood AdvisoryMOBGeorge118 min
Mar 5, 3:27 PM CSTMarine Weather StatementMOB3 hr
Mar 5, 3:40 PM CSTSpecial Marine WarningMOB50 min
Mar 5, 3:59 PM CSTSpecial Marine WarningMOB61 min
Mar 5, 4:17 PM CSTSevere Thunderstorm WarningMOBBaldwin, Mobile58 min
Mar 5, 4:32 PM CSTSpecial Marine WarningMOB58 min
Mar 5, 5:01 PM CSTSpecial Marine WarningMOB32 min
Mar 5, 5:44 PM CSTSpecial Marine WarningMOB91 min

Nearby

Flash Flood Warnings in Mississippi, 2011Flash Flood Warnings in Alabama, 2011Every flash flood warning in 2011

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.