1 thunderstorm wind, as filed by the National Weather Service.
Every event with a place to put it. 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 Springfield, MO wrote its last area forecast discussion before the first event at Aug 20, 1:49 PM CST, 3 hours 56 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SPRINGFIELD MO 249 PM CDT FRI AUG 20 2004 .DISCUSSION... PRIMARY FORECAST CHALLENGE IS CHANCE FOR FOG TONIGHT. WATER VAPOR LOOP SHOWS ELONGATED TROUGH FROM IOWA SWWD INTO TEXAS PANHANDLE WHERE DISCRETE VORT MAX NOTED. LARGE BANK OF LOW LEVEL RH CONTINUES AHEAD OF THIS FEATURE OVER ALL OF CWA WITH LOW CIGS IN MUCH OF THE AREA. SURFACE VISIBILITIES HAVE IMPROVED, BUT CONCERN IS FOR STRATUS BUILD DOWN TONIGHT. WEAK SURFACE PRESSURE GRADIENT AND APPROACHING SHORTWAVE WITH NEUTRAL VV TO WEAK UVV SHOULD KEEP LOWEST SEVERAL THOUSAND FEET NEARLY SATURATED INTO MID MORNING. UPS RESEARCH PAPER ON STRATUS BUILD DOWN SUGGESTS THAT IF SOIL TEMP MINUS CROSSOVER TEMP (MINIMUM DEWPOINT TEMP) IS 5 F OR GREATER, THEN UPWARD LONGWAVE RADIATION SHOULD KEEP NEAR SURFACE FROM BEING CHILLED ENOUGH FOR STRATUS BUILD DOWN. LATEST SOIL TEMPS FROM MT. VERNON AG SITE AT 2 INCHES ARE NEAR 70 F, AND AROUND 73 AT 4 INCHES. CROSSOVER TEMP SO FAR THIS AFTERNOON OF 64 SHOULD PRECLUDE STRATUS FROM REACHING THE GROUND TONIGHT. DRIZZLE/OCCASIONAL SPRINKLES AND LIGHT FOG WILL LIKELY TAKE VIS DOWN TO 1 TO 3SM, BUT THINK DENSE FOG (STRATUS AT GROUND LEVEL) IS UNLIKELY. CIGS WILL LIKELY BE NEAR 100 FEET AT BEST THOUGH. ETA LOW LEVEL RH PROGS SHOW LOW STRATUS WILL BE SLOW TO LIFT TOMORROW MORNING BUT SOME PARTIAL CLEARING IS EXPECTED BY AFTERNOON IN ALL BUT THE SERN THIRD OF THE CWA. THIS COULD KEEP MAX TEMPS THERE A FEW DEGREES COOLER THAN AREAS TO THE WEST. NEXT SHORTWAVE APPROACHES SUNDAY NIGHT INTO MONDAY, AND GFS, ETA, AND ECMWF ALL NOW RESOLVE THIS FEATURE FAIRLY WELL. HAVE UPPED POPS A BIT TO CHANCE CATAGORY. MID LEVEL PATTERN SHIFT STILL ON TRACK FOR THE LAST HALF OF THE UPCOMING WORK WEEK. BOTH ECMWF AND GFS SOLUTIONS SHOW 1000 TO 500 MB THICKNESSES INCREASING TO NEAR 5800 GPM IN WESTERN CWA BY TUESDAY AFTERNOON, THEN SPREADING EASTWARD INTO FRIDAY. IT REMAINS TO BE SEEN HOW PROGRESSIVE THE WRN US TROUGH WILL BE INTO NEXT WEEKEND. BROWNING && .AVIATION... SEE DETAILS ABOVE. && .SGF WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. WFO SGF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPRINGFIELD MO 1258 PM CDT FRI AUG 20 2004 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-211100- BARRY MO-BARTON MO-BENTON MO-BOURBON KS-CAMDEN MO-CEDAR MO- CHEROKEE KS-CHRISTIAN MO-CRAWFORD KS-DADE MO-DALLAS MO-DENT MO- DOUGLAS MO-GREENE MO-HICKORY MO-HOWELL MO-JASPER MO-LACLEDE MO- LAWRENCE MO-MARIES MO-MCDONALD MO-MILLER MO-MORGAN MO-NEWTON MO- OREGON MO-OZARK MO-PHELPS MO-POLK MO-PULASKI MO-SHANNON MO- ST. CLAIR MO-STONE MO-TANEY MO-TEXAS MO-VERNON MO-WEBSTER MO- WRIGHT MO- INCLUDING THE CITIES OF...AVA...BOLIVAR...BRANSON...CAMDENTON... FORT LEONARD WOOD...FORT SCOTT...HOUSTON...JOPLIN...LEBANON... MONETT...MOUNT VERNON...NEOSHO...NEVADA...OSAGE BEACH...OZARK... PITTSBURG...ROLLA...SPRINGFIELD...STOCKTON AND WEST PLAINS 1258 PM CDT FRI AUG 20 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MISSOURI OZARKS AND EXTREME SOUTHEAST KANSAS. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. SCATTERED THUNDERSTORMS ARE POSSIBLE SUNDAY NIGHT INTO MONDAY WITH THE PASSAGE OF AN UPPER LEVEL DISTURBANCE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. BROWNING
The St Louis radar (KLSX), 126 km away, was scanning. The volume nearest the first event began at 23:45 UTC.
1 thunderstorm wind. Local standard time, as filed.
Severe thunderstorm wind gusts downed numerous trees in the city of Rolla.
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: 5415729.