Swirling winds moved over a business and produced damage to a sky light on the business rooftop and a ventilation system on the rooftop. Radar imagery and web cameras overlooking McMinnville are indicate no notable showers over the town at the time, so presumably it was a dust devil.
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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 PQR wrote it up.
Swirling winds moved over a business and produced damage to a sky light on the business rooftop and a ventilation system on the rooftop. Radar imagery and web cameras overlooking McMinnville are indicate no notable showers over the town at the time, so presumably it was a dust devil.
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 Portland, OR wrote its last area forecast discussion before the first event at Apr 9, 6:03 AM PST, 7 hours 53 minutes earlier.
Area Forecast Discussion...UPDATED
National Weather Service Portland OR
703 AM PDT Tue Apr 9 2024
.SYNOPSIS...
Upper level high pressure builds today, dissipating the
weak system over the area. The high pressure will maintain warmer
and dry conditions Wednesday and Thursday. The next system
approaches Thursday night to Friday, returning precipitation chances.
However the bulk of the precipitation heads towards California.
&&
.SHORT TERM...Now through Wednesday...
through Wednesday...Weakening cold front extending
southwest from the central Washington coast is forecast to shift in
southwest WA and northwest Oregon today. Despite precipitable water
(PW) values around 0.5 to 0.8 inch early this morning, there is not
much lift is associated with this system. PW values decrease as the
day progresses with QPF amounts rather modest. Most pcpn will fall at
the coast and southwest WA generally in the 0.10 to 0.25 inch range.
Rain amounts quite a bit less, if at all, the further south in the
forecast area. Upper level high pressure builds over the region
later today into Wednesday, returning warmer daytime temperatures and
dry conditions. There will be the potential for frost development
Tuesday night as clearing skies and light offshore winds support
enhanced radiational cooling. Locations such as the north Oregon
Coast Range, Willapa Hills, northern Clark County lowlands, south
Washington Cascade Foothills and Upper Hood River Valley have a
70-80% chance of Wednesday morning lows dropping to 33-36 deg F.
Frost Advisory remains in effect for these locations
beginning 12 AM Wednesday and lasting through mid-morning.
/mh -Alviz
.LONG TERM...Wednesday night through Monday...The upper ridge shifts
east Wednesday night and Thursday as the next system approaches off
the northeast Pacific. WPC clusters are in good agreement Thu with
the upper ridge axis over ID/western MT. The clusters begin to
diverge Fri on how it handles the incoming system. But the overall
trend is for the system to remain off the WA/OR coast as it dives
toward CA. So some uncertainly in rain chances/cloud cover, and
resulting temperatures. NBM shows increasing uncertainty with the
high temperatures Thu-Sat with the 25/75th percentile difference of
6-10 degrees F Thu to around 15 degrees F by Sat. For now the NBM
guidance is a decent start with temperatures slightly above normal
through the weekend.
Overall not much in the way of impactful weather. Snow levels Friday
and Saturday are forecast around 5000-6000 ft, so no impactful winter
weather is expected for the Cascade passes going into the weekend.
/mh -Alviz
&&
.AVIATION...For inland terminals, predominantly VFR with the
front bringing occasional MVFR conditions (chances around 30-40%)
between 11-18Z Tuesday. Coastal locations will likely bounce
between IFR and MVFR conditions through 18-20Z Tuesday, with
chances of lowering to LIFR around 10-20%. Expect most terminals
to return to VFR conditions and showers to end thereafter, around
18-20Z Tuesday. Otherwise, expect southerly winds along the coast to
shift westerly around 12Z Tuesday and northerly around 18Z
Tuesday.
PDX AND APPROACHES...Currently VFR, expected to remain so through
the TAF period. Only exception is infrequent MVFR conditions
remain possible through 18Z Tuesday, with chances around 20-30%.
Winds will remain under 10 kt and shift from southwesterly to
northerly (18-19Z Tuesday) through the TAF period. -JH
&&
.MARINE...Conditions will continue to improve as winds diminish
and seas subside behind the front this morning. Small Craft
Advisory for Columbia River Bar due to strong ebbs until 10AM
Tuesday and again Wednesday morning. Going forward, high
pressure builds offshore the rest of Tuesday and persists over
the Pacific Northwest through the middle of week yielding more
summer-like northerly breezes across the waters through early
Thursday. Seas stay dominated by a mid period westerly swell
around 5-8 ft at 11-13 seconds for much of the week into next
weekend. -JH
&&
.PQR WATCHES/WARNINGS/ADVISORIES...
OR...Frost Advisory from midnight tonight to 9 AM PDT Wednesday for
ORZ104-106-121.
WA...Frost Advisory from midnight tonight to 9 AM PDT Wednesday for
WAZ203-205-208.
PZ...Small Craft Advisory until 10 AM PDT this morning for PZZ210.
Small Craft Advisory from 3 AM to 9 AM PDT Wednesday for
PZZ210.
&&
www.weather.gov/portland
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www.twitter.com/NWSPortlandThe national radar mosaic for the moment the first event began.
1 dust devil. Local standard time, as filed.
Swirling winds moved over a business and produced damage to a sky light on the business rooftop and a ventilation system on the rooftop. The location was estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2024Every state in 2024This day in weather historyWarnings in Oregon, April 2024
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: 1176543.