Rainfall and snow melt combined to increase the flow on the Silvies River to minor flood stage.
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The episode as NWS BOI wrote it up.
Rainfall and snow melt combined to increase the flow on the Silvies River to minor flood stage.
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 17, 7:14 AM PST, 3 hours 46 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 914 AM MDT Fri Mar 17 2017 .DISCUSSION...Only update to forecast so far was to issue an updated, expanded Flood Advisory for portions of the forecast area. Additional details can be seen in the Hydrology section. && .AVIATION...VFR. Increase in mid-upper level cloud cover over night. Isolated showers begin pushing in late Friday night. Surface winds, variable 10 kts or less through Friday 18z then 10-20 kts. Winds aloft to 10k feet MSL, southwest 20-45 kts. Weekend Outlook...Increased shower activity Friday night into Saturday mostly for northern portions of the CWA. Showers increase in coverage Saturday night and continue through Sunday. Snow levels above 5500 feet MSL through Sunday afternoon then drop to between 3500-6000 feet MSL in northwest portions of the CWA. && .HYDROLOGY...Warm temperatures today will lead to additional snowmelt impacting already swollen streams and rivers across the area. Additionally, a moist system approaching the area this weekend will result in another round of precipitation to further bring some small streams and rivers to near bankfull conditions for portions of eastern Oregon and southwestern Idaho. Some minor flooding possible is anticipated across the northern third of the forecast area. This includes Baker County in Oregon, the West- Central and Boise Mountains, and Upper Weiser Basin, in Idaho. These areas of high likelihood have been included in an updated, expanded Flood Advisory, the details of which can be seen in its product. Additional Flood Warnings remain in effect with some river levels expected to recede tonight and into the weekend to below flood stage. However, the Boise River at Glenwood will remain in minor flooding due to controlled flows. && .PREV DISCUSSION... SHORT TERM...Today through Saturday...Southwest flow aloft will continue through the short term, and embedded within that flow a weak short wave trough will move through the area Saturday afternoon. The flow is moist, and showers will move into southeast Oregon and the West-Central Mountains generally west of McCall this afternoon. Overnight, the precipitation spreads south and east, and the chance for precip covers the entire area. Saturday, as the short wave trough moves through, an accompanying cold front will move through as well. Instability will increase ahead of and along the front, and there is a slight chance of thunderstorms generally south and east of a line from Rome, Oregon to Caldwell to Warm Lake Saturday afternoon. Precipitation totals through the short term will average 1/3 to 3/4 of an inch in the mountains, with a tenth or less in the lower elevations. This rainfall will exacerbate flooding on some rivers. See the hydrology section below for more. Temperatures will remain quite mild today, but turn cooler tomorrow. Overnight lows tonight will be very mild (around 15 degrees above normal) due to cloud cover and wind. LONG TERM...Saturday night through Friday...An active pattern still looks likely for the long term as a series of troughs will move into the PACNW. The first upper level trough is expected to move east of the area on Saturday night into Sunday morning, but leave a stationary boundary placed across the middle of the CWA for Sunday. Precip is expected along this boundary and models suggest it will weaken later on Sunday, then be pushed north by surface southwest flow ahead of the next upper trough. Showers continue through the period with trough passage and a cold front early Wednesday morning and possibly another on Thursday. Temperatures are expected to remain above normal through at least Wednesday, and likewise, snow levels will stay 6000 ft and higher. Thursday and Friday look to be cooler and more near normal. HYDROLOGY...The Boise River remains in minor flood for the foreseeable future. The Weiser River will be in minor flood through roughly 7 pm MDT today. The Payette River near Emmett is about an inch below minor flood as of 145 am MDT, but is not expected to rise above flood stage at this time. Reports of field flooding in northern Harney county and rises along Mores Creek in the Boise mountains are likely representative of many higher elevations sites due to snowmelt. With a mild airmass remaining in place through at least Saturday, expect to see further hydrology issues develop. Basins with a remaining snowpack could see additional lowland flooding, while high- elevation fed streams and rivers will see further rises and possibly minor flooding. Snow levels will remain at or above 8k feet on Saturday as a low pressure system brings another round of precipitation to the area. This will likely accelerate runoff and increase flooding potential. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise DISCUSSION...KB AVIATION.....JS HYDROLOGY...KB PREV SHORT TERM...SP PREV LONG TERM....EP PREV HYDROLOGY....SP/DG
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Flooding occurred along the Silvies River around the Burns, 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: 697143.