Oregon, 2002Flash Flood in Oregon, July 18, 2002
July 18, 2002 · NWS PDT · 1 event in 1 county or zone
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.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
Open the live radar over this ground
- Deaths
- 0
- Injuries
- 0
- Property damage
- $1.0 million
- Crop damage
- None recorded
- Events
- 1
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.
What forecasters said that day
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 Pendleton, OR wrote its last area forecast discussion before the first event at Jul 18, 1:30 PM PST, 1 hour 30 minutes earlier.
Area forecast discussion, Jul 18, 1:30 PM PST, 1 hour 30 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT THU JUL 18 2002
FIRE WEATHER...AN UPPER LEVEL TROUGH LOCATED ALONG THE NORTHERN
CALIFORNIA AND NEVADA BORDER HAS PRODUCED NUMEROUS THUNDERSTORMS
WITH HEAVY RAIN REPORTED NEAR THE LAKE TAHOE AREA. SOME MID AND HIGH
LEVEL CLOUDS HAVE SPREAD INTO SOUTHEAST OREGON...AND RADARS AT
BOISE AND MEDFORD ARE ESTIMATING LIGHT RAINFALL OVER SOUTHERN
OREGON. THE UPPER LEVEL TROUGH WILL WEAKEN AS IT MOVES
NORTHEAST TONIGHT. MOST OF THE PRECIPITATION FROM SHOWERS AND
THUNDERSTORMS WILL BE IN SOUTHEAST OREGON. HOWEVER...LINGERING
MOISTURE AND INSTABILITY OVER THE OCHOCO MOUNTAINS AND THE NORTHEAST
OREGON MOUNTAINS WILL RESULT IN ISOLATED SHOWERS AND THUNDERSTORMS
THERE. THE AIR MASS HAS MOISTENED SO STORMS ARE NOT EXPECTED TO BE
DRY TONIGHT.
COOLER AND MORE STABLE CONDITIONS ARE EXPECTED ON FRIDAY ASSOCIATED
WITH A WEAK MARINE PUSH. A LARGE UPPER LEVEL TROUGH MOVING ACROSS
BRITISH COLUMBIA AND NORTHERN WASHINGTON WILL HELP TO STEEPEN THE
MARINE LAYER. BREEZY TO WINDY CONDITIONS CAN BE EXPECTED OVER THE
KITTITAS VALLEY AND THE EASTERN COLUMBIA GORGE. ALTHOUGH MODELS ARE
NOT SHOWING A VERY TIGHT GRADIENT OVER THE BASIN...EXPECT OCCASIONAL
BREEZY WINDS FRIDAY AND FRIDAY EVENING. WILL KEEP A SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FRIDAY
AFTERNOON AND EVENING. NO PRECIPITATION IS EXPECTED ON SATURDAY.
SMITH
EXTENDED...AN UPPER LOW PRESSURE SYSTEM OFF THE CALIFORNIA COAST
WILL BRING MOISTURE TO THE OREGON BORDER ON SUNDAY. HOWEVER...
WESTERLY FLOW ALOFT OVER NORTHERN OREGON AND WASHINGTON WILL PREVENT
THE MOISTURE FROM ENTERING THE FORECAST AREA ON SUNDAY. THE
AFOREMENTIONED LOW WILL MOVE NORTH AND INLAND TO NORTHERN CALIFORNIA
AND SOUTHERN OREGON ON MONDAY. ALSO ON MONDAY A SHORT WAVE WILL MOVE
SOUTHEAST ACROSS BRITISH COLUMBIA THUS COMING INTO PHASE WITH
AFOREMENTIONED UPPER LOW. THIS WILL OPEN UP THE SOUTHERLY FLOW ALOFT
OVER OREGON AND ALLOW MOISTURE TO MOVE INTO CENTRAL OREGON FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL OREGON AND THE OCHOCO-JOHN
DAY HIGHLANDS ON MONDAY AND TUESDAY. ON WEDNESDAY AND THURSDAY...
HIGH PRESSURE OVER THE FOUR CORNERS STRENGTHENS AND BUILDS WESTWARD
ACROSS CALIFORNIA WHILE THE WESTERLIES WILL DOMINATE THE PACIFIC
NORTHWEST FOR DRY CONDITIONS ACROSS THE REGION . POLAN
PDT 0000 ALW 0000 PSC 0000 YKM 0000
KPDT...VCP21..OPERATIONAL.
.KPDT...NONE.
Flash Flood, Wallowa
- When
- July 18, 3:00 PM PST to 4:00 PM PST
- Where
- Wallowa County, 5 mi S of Joseph
- Property damage
- $1.0 million
- Reported by
- NEWSPAPER
- Coordinates
- 45.580, -117.181 (the zone’s center; the record gives no point)
The Wallowa County Sheriff's Office confirmed a mudslide near the Blue Mountain Council Boy Scout Camp at the south end of Wallowa Lake. The mudslide destroyed a dining hall near the boy scout camp. The debri flow in the lake was several feet thick. The mudslide swept away several trees and damaged three vehicles in its path.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flash Flood in Colorado, July 18, 2002$158,000 · 1 event
- Damaging Wind and Lightning Strike in Indiana, July 18, 2002$97,000 · 2 events
- Flash Flood in Pennsylvania, July 18, 2002$100,000 · 1 event
- Lightning Strike in Florida, July 18, 2002$90,000 · 1 event
- Damaging Winds and Lightning Strikes in Michigan, July 18, 20022 injured · $30,000 · 56 kt wind · 5 events
- Hail and Damaging Winds in Iowa, July 18, 2002$58,000 · 2 in hail · 4 events
- Damaging Wind in Florida, July 18, 2002$50,000 · 1 event
- Tornado in Minnesota, July 18, 2002F1 · 1 event
- Hail and Damaging Winds in New York, July 18, 2002$27,000 · 0.75 in hail · 4 events
- Damaging Winds in Iowa, July 18, 200261 kt wind · 14 events
- Lightning Strike in Florida, July 18, 20021 injured · 1 event
- Flash Flood in Missouri, July 18, 20021 injured · 1 event
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: 5307250.