Alert archive / Mississippi / Flash Flood Warnings in 2004

Flash Flood Warning 4, NWS Mobile, AL

May 12, 2004George County, Mississippi

NWS Mobile, AL issued this flash flood warning at May 12, 2004, 7:17 PM CDT for George 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
May 12, 2004, 7:17 PM CDT (00:17 UTC)
Expired
May 12, 2004, 10:00 PM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Counties, with a storm outline in the text

County George County, MS

The radar

The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 00:19 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 00:00Z, 0.3 hours before the alert went out and 122 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 00:00Z on 2004-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 85 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, Slidell Radar S, LA at 00:00Z on 2004-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
85 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMOB 130018
FFWMOB
MSC039-130230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
717 PM CDT WED MAY 12 2004

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GEORGE COUNTY IN SOUTHEAST MISSISSIPPI

* UNTIL 930 PM CDT

* AT 717 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM     
  NEAR LUCEDALE TO NEAR BASIN...AND MOVING EAST...NORTHEAST AT 10    
  MPH. RADAR RAINFALL ESTIMATES INDICATE THAT A SWATH OF 2 TO 4      
  INCHES OF RAIN HAS FALLEN ACROSS MUCH OF THE WESTERN HALF OF THE   
  COUNTY OVER THE LAST FEW HOURS. ANOTHER 2 TO 3 INCHES IS POSSIBLE  
  THROUGH 930 PM THIS EVENING AS STORMS CONTINUE TO MOVE SLOWLY      
  EASTWARD ACROSS THE COUNTY.  

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS...STREETS AND UNDERPASSES...AS WELL AS 
OTHER POUR DRAINAGE AND LOW LYING AREAS.

RESIDENTS LIVING IN FLOOD PRONE AREAS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. REMEMBER...IT ONLY
TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

LAT...LON 3098 8880 3076 8883 3076 8844 3099 8845

$$
1 follow-up statement
000 
WGUS74 KMOB 130217
FFSMOB
MSC039-111-131-130300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
915 PM CDT WED MAY 12 2004

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...

IN SOUTHEAST MISSISSIPPI...GEORGE...STONE AND PERRY COUNTIES.

AT 915 PM CDT WEATHER SERVICE RADAR INDICATED THAT THE HEAVY RAIN 
PRODUCING THUNDERSTORMS HAVE MOVED EAST OF THE AREA AND WEAKENED... 
AND THEREFORE ENDING THE IMMEDIATE THREAT OF FLASH FLOODING. 

ALTHOUGH THE HEAVY RAIN HAS ENDED...SOME MINOR PONDING OF WATER OVER 
FLOOD PRONE AREAS AND ROADWAYS COULD CONTINUE TO POSE A HAZARD TO 
TRAVEL FOR THE NEXT COUPLE OF HOURS. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODED AREAS. DO NOT DRIVE INTO WATER COVERED ROADWAYS 
OR UNDERPASSES. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW A SAFE 
CROSSING. REMEMBER...TURN AROUND...DONT DROWN. 

$$

Nearby

Flash Flood Warnings in Mississippi, 2004Every flash flood warning in 2004

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.