4 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 4 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 Kansas City, MO wrote its last area forecast discussion before the first event at Aug 4, 3:43 AM CST, 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 443 AM CDT WED AUG 4 2004 .DISCUSSION... RAIN WILL BE EXITING NORTHERN MISSOURI THIS MORNING AS THE LARGE CONVECTIVE COMPLEX THAT ORIGINATED IN SOUTHERN IOWA WEAKENS AND MOVES EAST. THE MOST SIGNIFICANT RAIN OCCURRED OVER NORTH CENTRAL AND NORTHEASTERN MISSOURI EARLY THIS MORNING. RADAR ESTIMATES FROM BETHANY TO MILAN TO MACON PAINT A STRIPE OF THREE TO FOUR INCHES, BUT GROUND TRUTH HAS BEEN ONLY ABOUT HALF THAT. THE COLD FRONT THAT TRIGGERED THE BIG STORMS IS NOW OVER EXTREME NORTHERN MISSOURI. HIGH PRESSURE BUILDING OVER THE UPPER MIDWEST WILL PUSH THIS FRONT SLOWLY SOUTHWARD TODAY, BUT I DONT THINK THAT THE COLD FRONT WILL BE A TRIGGER FOR THUNDERSTORMS TODAY. AN OUTFLOW BOUNDARY/PRE-FRONTAL TROUGH WILL LIKELY SET UP OVER SOUTHERN MISSOURI AHEAD OF THE FRONT THIS AFTERNOON. THUNDERSTORMS WILL LIKELY IGNITE ALONG THIS PRE-FRONTAL BOUNDARY IN THE AXIS OF HIGHEST INSTABILITY. TODAY WILL NOT BE NEARLY AS HOT AS IT HAS BEEN THE LAST COUPLE OF DAYS, BUT THE REGION WILL HAVE TO WAIT UNTIL TONIGHT TO ENJOY SIGNIFICANTLY LOWER DEWPOINTS. DEWPOINTS BEHIND THE COLD FRONT IN IOWA GRADUALLY DECREASE TO THE MIDDLE 60S NORTH OF INTERSTATE 80, AND THIS AIR WONT ARRIVE IN MISSOURI UNTIL LATE IN THE DAY. COOLER AND DRIER AIR WILL FILTER INTO MISSOURI AND EASTERN KANSAS TOMORROW AS HIGH PRESSURE SLIDES SOUTH OUT OF CANADA TOWARDS THE GREAT LAKES. TEMPERATURE FIELDS FROM THE GFS ARE A BIT TOO COOL, SO I PREFER THE WARMER 850MB TEMPERATURES FROM THE ETA AND NGM. EVEN USING THE WARMER MODELS, RECORD LOW TEMPERATURES ARE WITHIN REACH FRIDAY MORNING. CLEAR SKIES, LIGHT WINDS, AND UNUSUALLY COOL AND DRY AIR WILL ALLOW TEMPERATURES TO FALL QUICKLY THURSDAY NIGHT. KANSAS CITYS RECORD IS 55 DEGREES SET IN 1990. SAINT JOSEPHS RECORD OF 54 DEGREES WAS SET THE SAME YEAR. THE WARM UP HEADING TOWARDS THE WEEKEND LOOKS LIKE IT WILL BE GRADUAL. THE HIGHLY AMPLIFIED RIDGE TROUGH PATTERN OVER THE EASTERN TWO-THIRDS OF THE COUNTRY WILL TRAP COOL HIGH PRESSURE OVER THE MIDWEST THROUGH SATURDAY. AS THE SURFACE HIGH GRADUALLY RETREATS SATURDAY NIGHT AND SUNDAY, WELL HAVE TO WATCH FOR WARM ADVECTION SHOWERS AND THUNDERSTORMS IN THE NORTHWEST FLOW, ESPECIALLY OVER NORTHERN PORTIONS OF MISSOURI. THE LAST FEW RUNS OF THE GFS SUGGEST DECENT 850MB THETA-E ADVECTION OVER EASTERN NEBRASKA AND WESTERN IOWA. THIS COULD BE A POTENTIAL BREADING GROUND FOR THUNDERSTORMS CLUSTERS WHICH COULD DIVE SOUTHEAST. KOCH && .PREV DISCUSSION... 340 PM TUE... THUNDERSTORM CHANCES OVERNIGHT ARE THE MAIN CONCERN IN THE SHORT TERM. THE HEAT IS ALREADY TAKEN CARE OF...AS THE HEAT ADVISORY RUNS UNTIL 8 PM. AFTER THAT WE ARE WAITING FOR SOME RAIN TO FINISH COOLING US OFF. COMPLEX OF STORMS CURRENTLY MOVING ACROSS IOWA AND SOUTHERN MN SHOULD CONTINUE MOVING EAST. IT SHOULD DROP SOUTH EVENTUALLY...BUT AND SHOULD BE WELL EAST OF US WHEN IT DOES SO. THE REMAINDER OF THE RAIN CHANCES WILL BE FROM TWO SEPARATE AREAS OF DEVELOPMENT. ETA AND GFS BOTH ADVERTISE A COMPLEX OF STORMS ROLLING OUT OF EASTERN NEBRASKA AND DROPPING SOUTH INTO NORTHWEST MO. CURRENT RADAR INDICATIONS ARE NO WHERE NEAR HAVING THIS HAPPEN...WITH MODELS SHOWING NORTHWEST MO UNDER THE GUN AROUND 00Z. 12Z TOP SOUNDING HAD H7 TEMPS AT +14...SO SOUTHWARD MOVEMENT OF STORMS WILL BE TOUGH UNTIL THE FRONT ARRIVES. MODELS ARE ALSO CONSISTENT IN HAVING SOME SPOTTY DEVELOPMENT ALONG THE FRONT WHICH SHOULD ARRIVE SOMETIME AFTER 06Z. THERE IS DECENT SHEAR AND INSTABILITY ASSOCIATED WITH THE FRONT...SO ISOLATED SEVERE OVERNIGHT IS ALSO POSSIBLE. HAVE HIGHER POPS NORTH OF HWY36 THIS EVENING FOR ACTIVITY DROPPING DOWN FROM IOWA...AND CHANCE ACROSS THE REST OF THE AREA FOR STORMS WITH THE FRONT. WILL KEEP SOME POPS IN THE EAST FOR POSSIBLE WED MORNING ONGOING ACTIVITY. THE REST OF THE DAY SHOULD BE IN THE 80S. MODELS ARE SHOWING SOME STRATUS COMING DOWN BEHIND THE FRONT...SO CLOUD DECK SHOULD ALSO KEEP TEMPS IN CHECK. A NORTHWEST FLOW REGIME WILL CONTINUE TO PREVAIL ACROSS THE REGION FROM FRIDAY INTO THE WEEKEND...AS THE TROUGH OVER THE EASTERN CONUS AMPLIFIES AND SUPPRESSES THE WESTERN RIDGE. THE USUAL UNCERTAINTIES WITH THIS PATTERN WILL MAKE POP DETERMINATION DIFFICULT...BUT ANTICIPATE THE BEST OPPORTUNITY FOR SHOWERS AND THUNDERSTORMS TO ARRIVE AT THE END OF THE WEEKEND. MEDIUM RANGE MODEL SOLUTIONS KEY IN ON A STRONGER SHORTWAVE TROUGH AND ASSOCIATED COLD FRONTAL PASSAGE ON SUNDAY AND MONDAY...ALTHOUGH LARGE DIFFERENCES REGARDING ITS PATH ARE PRESENT. THE GFS BRINGS THE LOW SOUTH ACROSS THE UPPER AND CENTRAL MISSISSIPPI VALLEY REGIONS...WHILE THE ECMWF FAVORS A MORE NORTHERLY TRACK ACROSS THE GREAT LAKES. EITHER WAY...THINK LOW CHANCE POPS ARE WARRANTED AT THIS POINT. HAVE HIGHLIGHTED MONDAY WITH 30 POPS ASSOCIATED WITH THE FROPA...WITH 20 POPS DURING ADJACENT PERIODS. NO BIG CHANGES WERE MADE WITH RESPECT TO TEMPERATURES...WITH READINGS EXPECTED TO BE NEAR TO OR BELOW NORMAL THROUGH MOST OF THE EXTENDED PERIOD. LVQ/LS && .EAX WATCHES/WARNINGS/ADVISORIES... KS...NONE. MO...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 1257 PM CDT TUE AUG 3 2004 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-041100- THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS. .DAY ONE...THIS AFTERNOON AND TONIGHT SEVERE THUNDERSTORMS ARE POSSIBLE IN NORTHEAST KANSAS AND NORTHERN MISSOURI LATER THIS EVENING AND OVERNIGHT. MOST OF THE SEVERE STORMS SHOULD STAY NORTH OF A LINE FROM ST JOSEPH TO MOBERLY...WITH DAMAGING WINDS GUSTS THE PRIMARY THREAT. A FEW THUNDERSTORMS ARE ALSO POSSIBLE SOUTH OF THIS LINE. THESE STORMS MAY BECOME STRONG...BUT REMAIN BELOW SEVERE LIMITS. A HEAT ADVISORY IS IN EFFECT THROUGH 8 PM FOR WESTERN AND CENTRAL MISSOURI AS WELL AS NORTHEASTERN KANSAS. HEAT INDICES WILL RANGE FROM 105 TO 110 DEGREES THIS AFTERNOON IN LOCATIONS INCLUDING KANSAS CITY, SAINT JOSEPH, MARYVILLE, WARRENSBURG, SEDALIA, AND CHILLICOTHE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORMS ARE FORECAST FOR MONDAY. AT THIS TIME...SEVERE THUNDERSTORMS LOOK POSSIBLE WITH THIS ACTIVITY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED MAINLY NORTH OF HIGHWAY 36 LATE THIS EVENING AND OVERNIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC AND CLIMATE INFORMATION...IS AVAILABLE ON THE WEB AT (LOWER CASE) HTTP://WWW.CRH.NOAA.GOV/EAX OR HTTP://WEATHER.GOV. LVQ
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 1133 PM CDT TUE AUG 3 2004 MOZ023>025-031>033-039-040-041000- CARROLL MO-CHARITON MO-HOWARD MO-LINN MO-LIVINGSTON MO-MACON MO- RANDOLPH MO-SALINE MO- 1133 PM CDT TUE AUG 3 2004 THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH NUMBER 705...IN EFFECT UNTIL 500 AM CDT WEDNESDAY MORNING. THIS SEVERE THUNDERSTORM WATCH INCLUDES THE FOLLOWING COUNTIES... IN MISSOURI: CARROLL...CHARITON...HOWARD...LINN...LIVINGSTON...MACON...RANDOLPH AND SALINE. SOME CITIES IN THIS SEVERE THUNDERSTORM WATCH INCLUDE CHILLICOTHE... MARSHALL AND MOBERLY. A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE WEATHER...INCLUDING LARGE HAIL...DAMAGING WINDS...AND LOCALLY HEAVY RAIN...IN AND CLOSE TO THE WATCH AREA. WHILE SEVERE WEATHER MAY NOT BE IMMINENT...PERSONS SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS...AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. KOCH
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 147 AM CDT WED AUG 4 2004 MOZ001>008-011>017-040800- ADAIR MO-ANDREW MO-ATCHISON MO-DAVIESS MO-DE KALB MO-GENTRY MO- GRUNDY MO-HARRISON MO-HOLT MO-MERCER MO-NODAWAY MO-PUTNAM MO- SCHUYLER MO-SULLIVAN MO-WORTH MO- 147 AM CDT WED AUG 4 2004 SEVERE THUNDERSTORM WATCH NUMBER 703 HAS BEEN CANCELLED AS OF 147 AM CDT WEDNESDAY MORNING. COUNTIES NO LONGER UNDER THIS SEVERE THUNDERSTORM WATCH INCLUDE... IN MISSOURI: ADAIR...ANDREW...ATCHISON...DAVIESS...DE KALB...GENTRY...GRUNDY... HARRISON...HOLT...MERCER...NODAWAY...PUTNAM...SCHUYLER...SULLIVAN AND WORTH. ALTHOUGH THE THREAT FOR WIDESPREAD SEVERE WEATHER HAS DIMINISHED ACROSS THE AREA...AN ISOLATED THUNDERSTORM MAY PRODUCE SMALL HAIL AND WIND GUSTS TO 40 MPH. MOZ023>025-031>033-039-040-040800- CARROLL MO-CHARITON MO-HOWARD MO-LINN MO-LIVINGSTON MO-MACON MO- RANDOLPH MO-SALINE MO- 147 AM CDT WED AUG 4 2004 SEVERE THUNDERSTORM WATCH NUMBER 705 HAS BEEN CANCELLED AS OF 147 AM CDT WEDNESDAY MORNING. COUNTIES NO LONGER UNDER THIS SEVERE THUNDERSTORM WATCH INCLUDE... IN MISSOURI: CARROLL...CHARITON...HOWARD...LINN...LIVINGSTON...MACON...RANDOLPH AND SALINE. ALTHOUGH THE THREAT FOR WIDESPREAD SEVERE WEATHER HAS DIMINISHED ACROSS THE AREA...A FEW STORMS MAY PRODUCE SMALL HAIL AND WIND GUSTS TO 40 MPH. DB
The Pleasant Hill radar (KEAX), 99 km away, was scanning. The volume nearest the first event began at 10:01 UTC.
4 flash flood. Local standard time, as filed.
4 to 6 inches of rain produced widespread flash flooding in the Marshall area. Several water rescues and several homes and businesses suffered water damage. Damage to roads and bridges as well. Flowing water was 3 to 4 feet deep on Route YY.
Heavy rains caused flooding on several roads.
Heavy rains caused flooding on several roads.
Flooding on Route Z.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2004Every state in 2004This day in weather historyWarnings in Missouri, 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: 5420206, 5420203, 5420204, 5420205.