A thunderstorm caused a strong wind gust along the west slope of the Blue mountains, east of Milton-Freewater.
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The episode as NWS PDT wrote it up.
A thunderstorm caused a strong wind gust along the west slope of the Blue mountains, east of Milton-Freewater.
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 Apr 11, 6:21 PM PST, 2 hours 59 minutes earlier.
Area Forecast Discussion National Weather Service Pendleton OR 721 PM PDT Wed Apr 11 2018 .SHORT TERM...Upper level trough continues to slowly push a cold front across the Pacific northwest. Radar currently showing areas of rain moving through the region. Expect this to become a more steady and widespread rainfall later this evening and overnight as the frontal boundary moves through. Cold advection will gradually lower the snow levels with the mountains picking up several inches of snow by morning. The upper level trough will be over the area Thursday with very cold air aloft. Should have partly to mostly cloudy skies with scattered showers through the day especially over the mountains. Winds aloft will be mixing down to the surface after frontal passage and expect breezy westerly winds later tonight into Thu. Cooler temperatures tomorrow as well with highs in the 40s to mid 50s. Upper level ridge builds into the area Thu night and Friday with a warm front moving through. 94 && .PREV DISCUSSION... /issued 425 PM PDT Wed Apr 11 2018/ SHORT TERM...Tonight through Sunday...A cold front continues to move onshore this afternoon that will slowly move eastward across the forecast area this evening and overnight producing precipitation. Ahead of the front there will be some instability showers then more steady precipitation during the frontal passage. The front will exit into Idaho early Thursday morning. Snow levels will lower to 3500 to 5000 feet over the eastern mountains late tonight where some accumulation snow will be possible but nothing worthy of issuing any advisories for. Will also see some increasing breezy westerly winds behind the cold front overnight and continue into Thursday. The upper level trough behind the front will pass over the forecast area Thursday triggering some more instability showers. There will be a slight chance of thunderstorms over the eastern mountains. Showers taper off Thursday evening as a ridge of high pressure builds over the region placing us under a southwest flow aloft. The next weather system will attempt to move over the ridge on Friday dragging a warm front across the forecast area for some low chances of precipitation. A deepening upper level trough off the coast will push another cold front through the region Sunday increasing the chance of precipitation once again. LONG TERM...Sunday night through Wednesday...A strong cold front moves through NE Oregon and SE Washington Sunday evening for rain showers likely in the lower Columbia Basin and adjacent valleys and a mix of rain/snow showers in the mountains. Monday mid/upper level trough moves over the region, which will keep snow showers in the eastern Oregon mountains and a chance of snow showers in central Oregon, but with dry conditions in the lower Columbia Basin, the Kittitas/Yakima valleys, the Simcoe Highlands and north central Oregon. Dry conditions Monday night/Tuesday due to a ridge building over the region. Wednesday the ridge persists for a continuation of dry conditions. Polan AVIATION...00Z TAFs...Cloud bases have lowered rapidly this afternoon ahead of a cold front, which has recently moved over the Cascades and is now marching eastward across the lower Columbia Basin. CIGS will be 040-070 AGL late this afternoon and into this evening while the cold front moves through the foothills of the Blue Mountains then over the Blue Mountains and through Wallowa County then moving into Idaho overnight. Winds will increase to 10-15kt with higher gusts associated with the stronger showers along and in advance the front. Winds will shift sharply from east-southeast briefly to south and then to the west during frontal passage by late this evening as a colder airmass arrives at terminals behind the front. Generally VFR conditions, except for brief episodes of MVFR/IFR in any heavier showers along the leading edge of the cold front will be possible at KPSC, KALW and KPDT 00-04Z. A few isolated thunderstorms will be possible late this afternoon and early this evening over the Blue Mountains, Grant County, Union County, eastern Crook County and SE Wheeler County eastward across Wallowa County and into Idaho. Polan && .PRELIMINARY POINT TEMPS/POPS... PDT 39 54 36 57 / 90 20 20 20 ALW 41 56 36 58 / 90 30 30 20 PSC 42 59 37 60 / 90 20 10 20 YKM 39 57 35 59 / 90 10 10 20 HRI 43 57 37 60 / 90 20 10 20 ELN 37 53 32 55 / 90 10 10 20 RDM 31 50 29 55 / 90 20 20 10 LGD 35 47 30 52 / 90 30 30 20 GCD 34 46 29 52 / 90 50 40 10 DLS 41 55 40 58 / 90 20 20 20 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && 94
The Pendleton radar (KPDT), 62 km away, was scanning. The volume nearest the first event began at 05:18 UTC.
1 thunderstorm wind. Local standard time, as filed.
Measured peak gust of 64 mph from a thunderstorm at Pikes Peak along the west slope of the Blue Mountains in Umatilla county. Elevation 3454 feet MSL.
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Every storm in Oregon in 2018Every state in 2018This day in weather historyWarnings in Oregon, April 2018
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: 745820.