Flooding occurred along the Snake River around the Ontario, Oregon area and surrounding fields and roads.
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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 episode as NWS BOI wrote it up.
Flooding occurred along the Snake River around the Ontario, Oregon area and surrounding fields and roads.
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 Mar 18, 7:55 PM MST, 4 hours 5 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 855 PM MDT Sat Mar 18 2017 .DISCUSSION...Moist SW flow aloft ahead of an upper trough and cold front was bringing showers primarily over the higher terrain of SE Oregon and SW Idaho. The showers in the the Treasure Valley have been light so far this evening. The cold front is located in Eastern Oregon near Baker City and Burns. The front is expected to slowly drift a little further south and east, possibly reaching Ontario and McCall overnight before stalling. Most of the showers are expected along the front and over the higher terrain through Sunday. Temperatures will be cooler on Sunday (but still slightly above normal), especially in areas north of the front such as Baker County. Only update will be to remove isolated thunderstorms this evening. && .AVIATION...Scattered showers, mainly focused over higher terrain. Partial mountain obscuration. Snow levels 7500-8500ft. Surface winds: SW-SE 5-15kt, strongest in SE Oregon near KREO. Winds aloft near 10 KFT MSL: Southwest 20-30 kt. && .HYDROLOGY...Concerns for flooding are with higher elevation snowmelt and rain on snow into the middle of next week. Small streams and rivers fed by high elevation snow will continue to rise with minor flooding possible. Heavier precipitation will focus along a stalled front tonight and Sunday in the central Idaho mountains and Weiser basin. This will likely lead to further rises possible along Payette and Weiser rivers along with the small feeder streams and creeks. Thus will keep small stream advisories and warnings in place through tomorrow. && .PREV DISCUSSION... SHORT TERM...Tonight through Monday...Upper trough and accompanying cold front tracking through the Pac NW will keep chance of showers over much of the area tonight. Surface front stalls across southeast Oregon and west-central Idaho overnight into Sunday, becoming the focus of precipitation development. This will keep s-central Idaho and areas along the ID/NV border dry into Sunday afternoon. Snow levels drop to around 6k in vicinity of the stalled front where liquid totals of 0.50 to 0.75 inches are expected through Sunday afternoon. Sunday night the front lifts north as a second trough approaches from the southwest. Showers continue Monday in the unstable warm sector ahead of the trough. Some potential for afternoon/evening thunderstorms but cloud cover will limit development which will focus near to the front if it develops. Temperatures are 5-10 degrees above normal through Monday. LONG TERM...Monday night through Saturday...Upper level trough will bring precipitation to the region Monday night through Thursday. Showers will continue Monday night into Tuesday. A cold frontal passage late Tuesday will bring widespread precipitation into Wednesday morning. Snow levels remain between 6500-7500 feet MSL through Wednesday morning. The weakening upper level trough splits as it moves inland late Wednesday through Thursday. This will bring more showers to the region and cooler temperatures. Another upper level trough follows on Friday with passage of a warm front for more widespread precipitation into Saturday. Temperatures remain at or above normal through the period. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise DISCUSSION...BW AVIATION.....KA HYDROLOGY...DG PREV SHORT TERM...DG PREV LONG TERM....JS
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Flooding occurred along the Snake River around the Ontario, Oregon area and surrounding fields and roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2017Every state in 2017This day in weather historyWarnings in Oregon, March 2017
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: 697190.