1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jackson, MS wrote its last area forecast discussion before the first event at Aug 20, 2:10 PM CST, 3 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSON MS 310 PM CDT FRI AUG 20 2004 .SHORT TERM...AN UNSEASONABLY ACTIVE SOUTHERN STREAM WILL BRING SEVERAL ROUNDS OF THUNDERSTORMS TO THE FORECAST AREA THROUGH THIS WEEKEND. SEVERAL SHORTWAVE TROUGHS EMBEDDED IN THE SOUTHERN STREAM WILL INTERACT WITH A MOIST UNSTABLE AIRMASS TO BRING A FAIRLY WIDESPREAD CONVECTIVE PRECIPITATION EVENT. LATEST PROFILER DATA INDICATE THE PRESENCE OF A LOW LEVEL JET OVER THE ARKLAMISS REGION AHEAD OF A WEAKENED EWD MOVING CONVECTIVE SYSTEM OVER ERN TX/SW LA. EXPECT WIDESPREAD CONVECTIVE PRECIP TODAY OVER THE ENTIRE FORECAST AREA. THE PRIMARY QUESTION IS WHETHER STRONG TSTMS MAY DEVELOP IN SE MS. IN THIS PART OF THE FORECAST AREA...IT APPEARS SIGNIFICANT DAYTIME HEATING AND DESTABILIZATION MAY OCCUR RESULTING IN STEEP LOW LEVEL LAPSE RATES. ELSEWHERE... SPEED OF THE CONVECTIVE CLOUD SHIELD ASSOC WITH UPSTREAM COMPLEX AND RAIN WILL LIMIT LOW LEVEL DESTABILIZATION AND DO NOT EXPECT MUCH IN THE WAY OF STRONG THUNDERSTORM ACTIVITY. THERE SHOULD BE A LULL IN THE ACTION TONIGHT AS THE FIRST SHORTWAVE TROUGH EXITS TO THE EAST AND HEIGHTS RISE TEMPORARILY. ANOTHER WAVE WILL APPROACH SATURDAY AND INTERACT WITH AN APPROACHING COLD FRONT TO BRING HIGH CONVECTIVE PRECIP COVERAGE AGAIN LATE SATURDAY AND SAT NIGHT. STILL MUCH UNCERTAINTY EXISTS IN STRENGTH OF THE TSTM ACTIVITY AS GFS IS MUCH MORE AGGRESSIVE IN GENERATING LOW LEVEL LAPSE RATES/INSTABILITY THAN THE ETA (MUCH PROBABLY ATTRIBUTABLE TO CONVECTIVE SCHEME). WILL OF COURSE IGNORE GRID SCALE FEED BACK IN GFS...BUT ITS MASS FIELDS ARE STILL IMPRESSIVE FOR PLENTY OF PRECIPITATION. WELL THE MODEL SOLUTIONS HAVE SLOWED A BIT WITH THE FRONTAL PASSAGE SUNDAY AND THE AREA ALONG AND SOUTH OF THE I-20 CORRIDOR WILL CONTINUE TO SEE AT LEAST SCATTERED CONVECTION. .LONG TERM...ANY DRIER AIR BEHIND THE FRONT SUNDAY NIGHT DOES NOT LOOK TO HANG AROUND LONG AS THE FRONT RETREATS NWD AND LOSES ITS IDENTITY. THE GFS IS CONSISTENT WITH HINTING AT A CONVECTIVE SYSTEM DEVELOPING IN RETURN FLOW MON NIGHT/TUESDAY...THEN DIURNALLY DRIVEN SCT COVERAGE CONVECTIVE EPISODES FOR THE NEXT FEW DAYS ALONG. TYPICAL LATE AUGUST TEMPERATURES CAN BE EXPECTED. && .JAN WATCHES/WARNINGS/ADVISORIES... MS...NONE. LA...NONE. AR...NONE. && 43/EC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 339 PM CDT FRI AUG 20 2004 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 212039- ADAMS-ASHLEY-ATTALA-BOLIVAR-CARROLL-CATAHOULA-CHICOT-CHOCTAW- CLAIBORNE-CLARKE-CLAY-CONCORDIA-COPIAH-COVINGTON-EAST CARROLL- FORREST-FRANKLIN LA-FRANKLIN MS-GRENADA-HINDS-HOLMES-HUMPHREYS- ISSAQUENA-JASPER-JEFFERSON-JEFFERSON DAVIS-JONES-KEMPER-LAMAR- LAUDERDALE-LAWRENCE-LEAKE-LEFLORE-LINCOLN-LOWNDES-MADISON LA- MADISON MS-MARION-MONTGOMERY-MOREHOUSE-NESHOBA-NEWTON-NOXUBEE- OKTIBBEHA-RANKIN-RICHLAND-SCOTT-SHARKEY-SIMPSON-SMITH-SUNFLOWER- TENSAS-WARREN-WASHINGTON-WEBSTER-WEST CARROLL-WINSTON-YAZOO- 339 PM CDT FRI AUG 20 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS .DAY ONE...TONIGHT AND SATURDAY... ...THUNDERSTORMS... THUNDERSTORMS WILL BE SCATTERED ACROSS THE LOWER MISSISSIPPI RIVER VALLEY TONIGHT AND SATURDAY. THEY WILL PRODUCE STRONG WIND AND GUSTS TO 40 MILES AN HOUR WILL BE POSSIBLE IN STRONGER STORMS. THUNDERSTORM ACTIVITY WILL BE MORE WIDESPREAD DURING THE DAY SATURDAY. THE STRONGER STORMS WILL DEVELOP OVER CENTRAL AND SOUTHERN AREAS SATURDAY AFTERNOON...GENERALLY SOUTH OF A LINE FROM WINNSBORO TO JACKSON TO MERIDIAN. A COLD FRONT MOVING ACROSS THE LOWER MISSISSIPPI RIVER VALLEY WILL STALL ACROSS NORTHERN MISSISSIPPI SATURDAY. THE AIR MASS OVER THE FORECAST AREA WILL REMAIN VERY MOIST AS HUMID GULF FLOW CONTINUES. THE AIR MASS WILL REMAIN SOMEWHAT UNSTABLE BUT ATMOSPHERIC WIND FLOW WILL NOT BE SUPPORTIVE OF WIDESPREAD STRONG CONVECTION. THUNDERSTORMS WILL PRODUCE GUSTY WIND AND WIND GUSTS FROM 20 TO 30 MILES AN HOUR WILL BE COMMON. STRONGER STORMS TONIGHT AND SATURDAY MAY PRODUCE WIND GUSTS AROUND 40 MILES AN HOUR. WIND GUSTS OF THIS MAGNITUDE MAY UPROOT TREES...ESPECIALLY DAMAGED TREES OR THOSE THAT SIT IN DAMP SOIL. ...FLOODING... SHOWERS AND THUNDERSTORMS WILL BE WIDESPREAD ACROSS THE FORECAST AREA TONIGHT AND SATURDAY. THE VERY MOIST AIR MASS CURRENTLY IN PLACE WILL RESULT IN HEAVY RAINFALL IN THE STRONGER THUNDERSTORMS AND PERIODS OF HEAVY RAINFALL WILL BE POSSIBLE AT ANY GIVEN LOCATION IN THE FORECAST AREA. THE BEST CHANCE FOR STRONG THUNDERSTORM DEVELOPMENT WILL BE ACROSS SECTIONS OF EAST CENTRAL LOUISIANA AND CENTRAL AND SOUTHERN SECTIONS OF MISSISSIPPI DURING THE DAY SATURDAY...ESPECIALLY ALONG AND SOUTH OF A LINE FROM WINNSBORO RO JACKSON TO MERIDIAN. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH FRIDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS... AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT ANTICIPATED THROUGH NEXT FRIDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Four to five inches of rain fell across portions of northern Concordia parish Friday evening. This very heavy rain fell in about two hours and caused significant flooding around Clayton. Several homes were flooded along with a few streets.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2004Every state in 2004This day in weather historyWarnings in Louisiana, August 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5414779.