A cold front plowed into Eastern Oregon and Southwest Idaho producing high winds across the area.
Every event with a place to put it; 2 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 episode as NWS BOI wrote it up.
A cold front plowed into Eastern Oregon and Southwest Idaho producing high winds across the area.
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 Jun 5, 1:48 PM MST, 4 hours 57 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 248 PM MDT Fri Jun 5 2020 .SHORT TERM...Tonight through Sunday night...Strong storms are possible this afternoon and evening, especially in eastern Oregon north of Rome and in Idaho north of a line from Caldwell to Idaho City to Stanley. Strong shear, along with ample heat and moisture, will create conditions favorable for storms to bring wind gusts greater than 50 mph and also hail to around 1 inch in diameter. A cold front will move through the region this evening and overnight, bringing a separate threat for winds gusting 30 to 40 mph. The front, or more likely a combination of storm outflow and the front, will move through Baker City around 6 pm PDT, Ontario around 8 pm MDT, Caldwell around 9 pm MDT, the greater Boise area between 9 and 10 pm MDT, Mountain Home shortly after 10 pm, and through the Hammett and Glenns Ferry areas by 11 pm before weakening as it heads through the western Magic Valley around midnight. As the large upper level low that is dominating our weather over the next few days moves closer tonight and Saturday, and then through the area Sunday, we will see multiple periods of showers and storms and much cooler weather. After highs today in the 90s in the lower elevations, we will see 60s Saturday and 50s Sunday. Snow levels will come down beginning tomorrow, and reach 5000-5500 ft Sunday morning, before rising again Sunday night. This will allow 3 to 4 inches of snow to accumulate on the ski areas, and up to 10 inches on the highest peaks of Adams and Valley counties. Rainfall amounts through 6 am Monday morning will average 0.2 to 0.7 inches in lower elevations and 1.0 to 1.75 inches in the mountains. This is an unseasonably strong storm for June, and is more typical of an early spring system. .LONG TERM...Monday through Friday...The low pressure system is exiting our region Monday leaving lingering showers for our higher elevations. A warm front pushes through Tuesday morning helping get temperatures climbing back above normal once again. Precipitation returns with this boundary for our northern tiers Tuesday afternoon before a brief break. By the end of the period another upper low can be seen drifting south, but differences in tracking are evident among models. Left the mention of showers returning Friday in the forecast for now and will evaluate further with new model runs. && .AVIATION...Mostly VFR. Shower activity will increase for areas in and around KTWF/KJER and KBKE this afternoon creating isolated MVFR to IFR conditions. Isolated thunderstorms expected through these areas as well. Shower activity will start to move across the rest of the area early Saturday morning. Gusty surface winds expected within showers/thunderstorms up to 50kts. Surface winds outside of showers, south to southwest 15-20kts with gusts of 25-30kts. Winds aloft to 10k feet MSL, southwest 35-40kts. Weekend Outlook...Showers and afternoon thunderstorms will continue through the weekend with heaviest showers in the higher elevations of SE Idaho. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise SHORT TERM...SP LONG TERM....JC AVIATION.....JC
Special Weather Statement
National Weather Service Boise ID
430 PM PDT Fri Jun 5 2020
ORZ062-060000-
Baker County OR-
430 PM PDT Fri Jun 5 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BAKER COUNTY UNTIL
500 PM PDT...
At 430 PM PDT, Doppler radar was tracking a strong thunderstorm near
Haines, or 7 miles southwest of North Powder, moving northeast at 50
mph.
Half inch hail and wind gusts up to 40 mph will be possible with this
storm.
This strong thunderstorm will be near...
North Powder and Thief Valley Reservoir around 440 PM PDT.
Tamarack Campground around 450 PM PDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.
&&
LAT...LON 4506 11729 4482 11794 4490 11817 4504 11810
4500 11801 4500 11796 4506 11788 4506 11785
4503 11779 4499 11777 4499 11757 4508 11756
4508 11733
TIME...MOT...LOC 2330Z 205DEG 42KT 4494 11801
KBSpecial Weather Statement National Weather Service Boise ID 607 PM MDT Fri Jun 5 2020 ORZ062-063-060030- Malheur County OR-Baker County OR- 607 PM MDT Fri Jun 5 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BAKER AND NORTHWESTERN MALHEUR COUNTIES UNTIL 630 PM MDT/530 PM PDT/... At 606 PM MDT/506 PM PDT/, Doppler radar was tracking a strong thunderstorm near Bullrun Rock, or 35 miles southwest of Baker City, moving north at 50 mph. Penny size hail and wind gusts of 50 to 55 mph will be possible with this storm. This strong thunderstorm will be near... Unity around 510 PM PDT. Unity Dam, Unity Reservoir and Baldy Mountain around 520 PM PDT. Phillips Reservoir, McEwen, Mason Dam and Larch Summit around 530 PM PDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. && LAT...LON 4423 11812 4429 11836 4480 11819 4460 11760 TIME...MOT...LOC 0006Z 197DEG 42KT 4434 11821 KB
Special Weather Statement
National Weather Service Boise ID
613 PM MDT Fri Jun 5 2020
IDZ016-028-060045-
Western Magic Valley ID-Camas Prairie ID-
613 PM MDT Fri Jun 5 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JEROME...CENTRAL
TWIN FALLS...SOUTHEASTERN CAMAS AND EASTERN GOODING COUNTIES UNTIL
645 PM MDT...
At 613 PM MDT, Doppler radar was tracking a strong thunderstorm near
Jerome, moving north at 50 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
This strong thunderstorm will be near...
Magic Reservoir around 640 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.
&&
LAT...LON 4257 11452 4263 11475 4336 11457 4335 11453
4333 11453 4330 11439 4320 11438 4319 11460
4286 11460 4285 11459 4285 11438 4283 11437
4280 11433
TIME...MOT...LOC 0013Z 199DEG 45KT 4271 11459
KASpecial Weather Statement
National Weather Service Boise ID
519 PM PDT Fri Jun 5 2020
ORZ062-060045-
Baker County OR-
519 PM PDT Fri Jun 5 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BAKER COUNTY UNTIL
545 PM PDT...
At 519 PM PDT, Doppler radar was tracking a strong thunderstorm near
North Powder, moving northeast at 45 mph.
Wind gusts up to 40 mph will be possible with this storm.
This strong thunderstorm will be near...
Thief Valley Reservoir around 520 PM PDT.
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.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.
&&
LAT...LON 4503 11782 4503 11780 4499 11777 4499 11768
4486 11783 4496 11805 4500 11802 4501 11794
4506 11788 4506 11785
TIME...MOT...LOC 0019Z 212DEG 38KT 4498 11789
KBSpecial Weather Statement
National Weather Service Boise ID
533 PM PDT Fri Jun 5 2020
ORZ062-060100-
Baker County OR-
533 PM PDT Fri Jun 5 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BAKER COUNTY UNTIL
600 PM PDT...
At 533 PM PDT, Doppler radar was tracking a strong thunderstorm over
Larch Summit, or 19 miles west of Baker City, moving north at 55 mph.
Wind gusts up to 40 mph will be possible with this storm.
This strong thunderstorm will be near...
Elkhorn Peak around 540 PM PDT.
Mount Ruth, Anthony Lakes Ski Area and Haines around 550 PM PDT.
Thief Valley Reservoir around 600 PM PDT.
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.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.
&&
LAT...LON 4502 11781 4457 11809 4461 11834 4474 11835
4475 11829 4483 11832 4487 11828 4487 11823
4495 11825 4501 11821 4505 11811 4500 11801
4500 11796 4506 11785
TIME...MOT...LOC 0033Z 190DEG 49KT 4467 11820
KBSpecial Weather Statement National Weather Service Boise ID 641 PM PDT Fri Jun 5 2020 ORZ062-060215- Baker County OR- 641 PM PDT Fri Jun 5 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BAKER COUNTY UNTIL 715 PM PDT... At 641 PM PDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Mason Dam, or 17 miles southwest of Baker City, moving north at 40 mph. Pea size hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Mason Dam, Phillips Reservoir, Salisbury and McEwen around 650 PM PDT. Elkhorn Peak around 700 PM PDT. Baker City, Haines and Flagstaff Hill around 710 PM PDT. 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. When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. && LAT...LON 4446 11793 4451 11817 4500 11822 4489 11765 TIME...MOT...LOC 0141Z 198DEG 36KT 4456 11802 KB
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
A wind gust of 77 MPH was recorded at Deer Haven RAWS, 10 miles east of Mountain Home.
A wind gust of 65 MPH was recorded at Catfish RAWS, 11 miles northwest of Weiser.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2020Every state in 2020This day in weather historyWarnings in Idaho, June 2020
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: 895457, 895455.