A moist flow from the south and unstable conditions lead to heavy rain and mudslides over parts of Southeast Oregon.
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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.
A moist flow from the south and unstable conditions lead to heavy rain and mudslides over parts of Southeast Oregon.
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 12, 2:10 PM MST, 3 hours 20 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 310 PM MDT Wed Jun 12 2019 .SHORT TERM...Tonight through Friday...A shortwave over northern CA and southern OR will move across the region tonight. Showers and thunderstorms are already developing in central OR and will continue to develop late this afternoon and continue overnight into Thursday. DCAPE values of 1000-1500J/kg will enhance the threat of gusty winds from showers and thunderstorms, with outflow winds up to 50kt possible. Showers and storms will gradually taper off by sunrise on Thursday morning. Showers and thunderstorms will redevelop on Thursday afternoon across much of the region. Gusty winds possible again with the thunderstorms on Thursday afternoon. By Friday, drier air from the northwest moves into the region, pushing the shower and thunderstorm threat to the SE along the ID/NV and ID/UT border. Temperatures will remain 5-10 degrees above normal. .LONG TERM...Friday night through Monday...Continued warm. An upper level high pressure ridge over the northwest coast on Saturday will weaken and move inland on Sunday. A weak disturbance moving inland behind the ridge will support showers and isolated thunderstorms over the west central Idaho mountains Sunday afternoon and evening, and again Monday afternoon. Temperatures will be around 5 degrees above normal. Monday night through Wednesday night...Clear and hot across most of the region starting Monday night as dry, stable upper flow dominates the pattern. Shower and afternoon thunderstorm activity are expected off and on across Valley County and vicinity as a series of upper level disturbances periodically brush by. Surface winds are expected to be westerly through northwesterly and close to breezy compliments of a tighter pressure gradient setting across the region the entire period. Look for a slight cool down to take effect starting Wednesday as a stronger upper disturbance drops in bringing with it a slightly cooler airmass. High and low temperatures will drop slightly from near normal on Tuesday to a few degrees below normal on Wednesday. && .AVIATION...Mainly VFR. A disturbance moving northeast from northern California and northwest Nevada will trigger scattered thunderstorms over southeast Oregon and the west central Idaho mountains after 13/22z, spreading into southwest Idaho after 13/04z. Isolated thunderstorms will continue past 13/06z. Surface winds variable less than 10 kts except gusts to 50 kts possible near thunderstorms. Winds aloft at 10k ft MSL west 10-20 kts. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise SHORT TERM...KA LONG TERM....JT/WH AVIATION.....JT
Special Weather Statement National Weather Service Boise ID 453 PM MDT Wed Jun 12 2019 ORZ062-063-122345- Malheur County OR-Baker County OR- 453 PM MDT Wed Jun 12 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL BAKER AND NORTH CENTRAL MALHEUR COUNTIES UNTIL 545 PM MDT/445 PM PDT/... At 452 PM MDT/352 PM PDT/, Doppler radar was tracking a strong thunderstorm over Dooley Summit, or 15 miles south of Baker City, moving east at 15 mph. Half inch hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Bridgeport around 420 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 4446 11796 4464 11793 4465 11749 4439 11755 TIME...MOT...LOC 2252Z 276DEG 12KT 4455 11785 AL
Special Weather Statement National Weather Service Boise ID 520 PM MDT Wed Jun 12 2019 ORZ063-064-130000- Oregon Lower Treasure Valley OR-Malheur County OR- 520 PM MDT Wed Jun 12 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MALHEUR COUNTY UNTIL 600 PM MDT... At 520 PM MDT, Doppler radar was tracking a strong thunderstorm near Westfall Butte, or 43 miles west of Ontario, moving east at 35 mph. Nickel size hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Westfall around 530 PM MDT. Harper around 540 PM MDT. Little Valley and Sugarloaf Butte around 550 PM MDT. Vines Hill, Bully Creek Reservoir and Double Mountain around 600 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 4385 11795 4403 11795 4409 11727 4377 11726 TIME...MOT...LOC 2320Z 271DEG 29KT 4394 11785 AL
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
528 PM MDT WED JUN 12 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0510 PM HAIL 9 NW DREWSEY 43.88N 118.51W
06/12/2019 E0.75 INCH HARNEY OR TRAINED SPOTTER
ESTIMATED 3/4 INCH HAIL REPORTED. HAIL LESSENED IN SIZE
OVER A SPAN OF 5 MINUTES.
&&
WHEWKOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
532 PM MDT WED JUN 12 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0529 PM HAIL 5 SSW HAINES 44.84N 117.97W
06/12/2019 M0.50 INCH BAKER OR TRAINED SPOTTER
MEASURED 1/2 INCH HAIL REPORTED.
&&
WHEWKOSpecial Weather Statement National Weather Service Boise ID 601 PM MDT Wed Jun 12 2019 IDZ012-ORZ063-064-130045- Lower Treasure Valley ID-Oregon Lower Treasure Valley OR- Malheur County OR- 601 PM MDT Wed Jun 12 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CANYON AND NORTHEASTERN MALHEUR COUNTIES UNTIL 645 PM MDT... At 600 PM MDT, Doppler radar was tracking a strong thunderstorm near Double Mountain, or 24 miles west of Parma, moving east at 25 mph. Half inch hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Double Mountain around 610 PM MDT. Shell Rock Butte around 620 PM MDT. Owyhee, Adrian and Keeney Pass 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 4367 11751 4385 11754 4396 11705 4368 11695 TIME...MOT...LOC 0000Z 262DEG 21KT 4377 11743 AL
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
The COOP observer at Owyhee Dam reported 2.27 inches of rain in a one hour period stranding campers near the dam due to rock and mudslides.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2019Every state in 2019This day in weather historyWarnings in Oregon, June 2019
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: 835883.