A disturbance caused strong to locally severe thunderstorms over Umatilla county in Oregon and Walla Walla county in Washington.
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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 PDT wrote it up.
A disturbance caused strong to locally severe thunderstorms over Umatilla county in Oregon and Walla Walla county in Washington.
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 Jun 8, 1:49 PM PST, 1 hour 4 minutes earlier.
Area Forecast Discussion National Weather Service Pendleton OR 249 PM PDT Thu Jun 8 2017 .SHORT TERM...Tonight through Sunday...The cold front has just about moved through the forecast area and now the unstable atmosphere associated with the upper level trough is beginning to spawn some convection over central Oregon. This will continue to spread north and east through the afternoon and evening with the main threat of thunderstorms being east of a line from Redmond to Pasco. The instability will begin to decrease with the loss of solar heating near sunset with showers decreasing and or ending for most of the forecast area overnight. The closed low at the center of the upper level trough will take up a position off the Pacific Northwest coast Friday and continue to cause instability showers during the afternoon and evening hours with some thunderstorms possible. By Saturday the low will be just off the southwest coast of Oregon with the coldest air aloft over the forecast area generating another day of convective showers and thunderstorms. Saturday night and Sunday the low moves into southern oregon with snow levels getting down to around 5000 feet meaning some of the higher elevations could see some measurable snowfall. Models are also suggesting that moisture wrapping around the low could become an issue with some sustained precipitation from central Oregon up through northeast Oregon. Again, with low snow levels this could produce some significant snow accumulations in the higher mountains. .LONG TERM...Sunday night through Thursday...12Z GFS and ECMWF model runs indicate the mid/upper low pressure system remaining over forecast area with the center of the low moving to the southern Oregon/Idaho border before daybreak Monday. As such expect wrap around moisture to continue over the eastern Oregon highlands through Sunday night for showers likely in the Blue Mountains, NE Grant County and Wallowa County. The low moves into Idaho/western Montana during the day on Monday, with the western flank of the low keeping wrap around moisture over far NE Oregon for a chance of showers on Monday. The low exits the Pacific Northwest Monday night for a flat high pressure and westerly winds aloft yielding a drying trend that persists through Thursday. Polan && .AVIATION...00Z TAFs...SCT-BKN mid level cloud bases through remainder of this afternoon through tonight with VFR cigs to continue through the forecast period. Cold front has moved across and out of the region with partial clearing allowing surface heating to produce marginal instability this afternoon, which will linger into this evening for scattered showers and isolated thunderstorms. It will be breezy from this afternoon through this evening in most areas with wind speeds between 10 to 20 kts with higher gusts of 15 to 25 kts at times. Polan && .PRELIMINARY POINT TEMPS/POPS... PDT 47 63 44 65 / 40 30 50 30 ALW 51 68 49 68 / 50 30 40 20 PSC 51 73 48 73 / 20 10 20 10 YKM 46 70 46 70 / 20 20 20 20 HRI 49 70 46 70 / 20 20 20 10 ELN 44 66 44 67 / 20 20 20 20 RDM 38 62 37 59 / 20 40 40 40 LGD 44 61 42 60 / 80 70 80 60 GCD 43 64 41 63 / 70 60 70 60 DLS 50 67 49 69 / 20 40 30 30 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && 91/99/99
Special Weather Statement National Weather Service Pendleton OR 330 PM PDT THU JUN 8 2017 ORZ502-507-082330- Foothills of the Northern Blue Mountains of Oregon OR- Northern Blue Mountains of Oregon OR- 330 PM PDT THU JUN 8 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN UMATILLA COUNTY UNTIL 430 PM PDT... At 329 PM PDT, Doppler radar was tracking a strong thunderstorm over northwestern Umatilla Reservation, or near Pendleton, moving northeast at 25 mph. Winds of 40 TO 45 mph will be possible with this storm. Locations impacted include... Pendleton, Milton-Freewater, Athena, Weston, Adams, Helix, Thorn Hollow, Cayuse, Bingham Springs, Rieth, Umatilla Reservation, Mission and Gibbon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4547 11877 4577 11898 4600 11827 4564 11811 TIME...MOT...LOC 2229Z 240DEG 24KT 4562 11875 GKH
Special Weather Statement
National Weather Service Pendleton OR
347 PM PDT THU JUN 8 2017
ORZ049-050-502-082345-
Grande Ronde Valley OR-Northern Blue Mountains of Oregon OR-
Wallowa County OR-
347 PM PDT THU JUN 8 2017
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL UMATILLA...WESTERN
WALLOWA AND CENTRAL UNION COUNTIES UNTIL 445 PM PDT...
At 346 PM PDT, Doppler radar was tracking a strong thunderstorm over
Meacham, moving east at 35 mph.
Wind gusts of 50 to 55 mph will be possible with this storm.
Locations impacted include...
La Grande, Meacham, Elgin, Island City, Cove, Imbler, Summerville,
Minam, Kamela, Hilgard and eastern Umatilla Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4529 11753 4528 11806 4530 11808 4530 11843
4542 11843 4545 11850 4561 11850 4583 11763
TIME...MOT...LOC 2246Z 260DEG 32KT 4552 11838
GKHThe Pendleton radar (KPDT), 36 km away, was scanning. The volume nearest the first event began at 22:54 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gust to 62 mph with sustained winds of 24 mph at the same time.
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, June 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: 706916.