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 Boise, ID wrote its last area forecast discussion before the first event at Aug 30, 12:45 PM MST, 5 hours 15 minutes earlier.
SOUTHWEST IDAHO/SOUTHEAST OREGON AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE IDAHO 145 PM MDT FRIDAY AUGUST 30 2002 A SHORTWAVE TROUGH WAS MOVING NORTHEAST ACROSS OUR AREA THIS AFTERNOON AND WILL EXIT TO THE EAST BY SATURDAY AFTERNOON. A FLAT UPPER RIDGE WITH STABLE AND DRY AIR WILL TAKE OVER SATURDAY NIGHT THROUGH MONDAY. WILL HAVE 20 TO 50 PERCENT POPS TONIGHT WITH THE SHORTWAVE AND 10 TO 20 PCT POPS ON SATURDAY AS THE WAVE EXITS. TEMPERATURES WILL BE 4-8 DEGREES ABOVE NORMAL SAT-MON. THREAT FOR ANY SEVERE WEATHER THIS AFTERNOON OR TONIGHT IS LOW. IN THE EXTENDED PERIOD (TUE-FRI)...A MAJOR TROUGH WILL TAKE OVER TUE/WED AND WILL BRING MUCH COOLER TEMPERATURES AND A CHANCE OF SHOWERS INTO THURSDAY. THE TROUGH WILL EXIT AND AN UPPER RIDGE WITH WARM AND DRY CONDITIONS WILL TAKE OVER NEXT FRI. THINK THE MRF MODEL WAS A LITTLE TOO FAST ON TAKING THE TROUGH OUT NEXT THU, OTHER MODELS AGREE. TEMPERATURES WILL START OUT NEAR NORMAL ON TUE, FALL ABOUT 10 DEGREES BELOW NORMAL ON WED/THU, THEN RISE TO NEAR NORMAL AGAIN NEXT FRI. .BOI...NONE. EGGER
The Boise radar (KCBX), 117 km away, was scanning. The volume nearest the first event began at 00:58 UTC.
1 flash flood. Local standard time, as filed.
Very heavy rainfall, estimated at more than one inch in 15 minutes, filled drainage ditches and sent mud and water across Highway 20 in Juntura, Oregon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2002Every state in 2002This day in weather historyWarnings in Oregon, August 2002
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: 5316442.