Short period southerly wind waves combined with a longer period westerly swell to produce sneaker waves along the southern Oregon coast.
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 MFR wrote it up.
Short period southerly wind waves combined with a longer period westerly swell to produce sneaker waves along the southern Oregon coast.
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 Medford, OR wrote its last area forecast discussion before the first event at Nov 30, 4:58 PM PST, 2 hours 2 minutes earlier.
Area Forecast Discussion
National Weather Service Medford OR
458 PM PST Sat Nov 30 2024
...Updated AVIATION discussion...
.DISCUSSION...The upper ridge over the area will remain with us
through at least the middle of next week, only varying in its
strength at times. Satellite imagery reveals a similar picture
compared to 24 hours ago with some differences. The low clouds
and fog are in the same general areas, the valleys west of the
Cascades and also portions of the Klamath Basin over the East
Side. But, the areas of clouds/fog are at least a little smaller
in coverage when superimposed on the same image from yesterday at
this time. The most noticeable difference is in the Umpqua Basin
where clouds have largely scattered out around Roseburg early
this afternoon. We're also seeing more breaks in/around Grants
Pass. We'll continue to see a reduction in cloud cover through
about 3 or 4 pm, though some areas will hold the clouds the rest
of the day. This really makes temperature forecasting in these
areas very difficult. Areas that manage to break out into the sun
early enough can have highs in the 40s/low 50s, while those that
don't are stuck in the low 30s.
If you live in the valleys and end up seeing some bonus sunshine
this afternoon, don't fret, the clouds/fog will likely come
right back into the same areas again tonight. The temperature
forecast is equally as tricky for the nighttime period. The longer
it stays clear, the colder it can get. Overall, expect lows in
the 20s and 30s for the west side and in the single digits to the
teens over the east side. Be careful if/when driving tonight into
Sunday morning. Areas that have fog and temperatures near freezing
could develop icy spots on roads. Also, visibility will likely be
reduced, making it more difficult to see.
Since we issue frost/freeze products all year long for the
coast, we will have another Freeze Warning/Frost Advisory for the
Coos/Douglas coast (Zone 21) for tonight where temperatures
should bottom out in the low to mid 30s.
With such strong inversions, it will be comparatively warmer at
the upper elevations. Mountain areas will also be much drier, so
if headed up in elevation to the mountains or otherwise the next
few days, carry along the lip balm.
Of course, with the high in place, vertical mixing/ventilation is
limited and this can lead to a build of pollutants close to the
ground. We have an Air Stagnation Advisory in place through at
least Wednesday.
The next chance at precipitation won't be until Thursday at the
earliest. Models are showing the upper ridge flattening as a
disturbance comes over the top into the PacNW then. This brings a
20-30% chance of showers to coastal areas and into NW Oregon, but
most precip will just skim by to our north. Ensembles do show a
potentially stronger front coming in sometime late next week or
next weekend, but confidence in the details at this range is low
at this time and precip potential remains highest from the the
Cascades/Siskiyous north and west. -Spilde
&&
.AVIATION...01/00Z TAFS...LIFR ceilings are persisting over Medford
and Klamath Falls this evening, while other terminals were able to
clear out. Fog returns to area valleys overnight per current
guidance, although timing and duration varied between different
sources. Freezing fog is possible at the Medford and Klamath Falls
terminals. With conditions drying slightly day by day, visibilites
should continue to clear through the day but some ceilings may
remain.
Other areas are expected to remain at VFR levels through the TAF
period. -TAD
&&
.MARINE...Updated 200 PM PST Saturday, November 30, 2024...Seas look
to remain below advisory levels through the rest of the weekend and
through at least Thursday. Long period swell will arrive in area
waters tonight, increasing wave heights but not enough to warrant an
advisory product. Long term guidance shows a chance of unsettled
seas next weekend. -TAD
&&
.BEACH HAZARDS...Updated 800 AM PST Friday, November 29, 2024...Long
period swell arrives this evening and persists through Sunday
afternoon. There is a high risk of sneaker waves during this time
period and, as such, a beach hazards statement is in effect. Sneaker
waves can run up the beach much farther than normal, inundating the
beaches and possibly washing over rocks and jetties. Waves may also
lift driftwood logs, trapping anyone caught underneath. Please stay
stay alert and vigilant when walking along the beaches this weekend.
-Spilde
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Beach Hazards Statement from 7 PM PST this evening through
Sunday afternoon for ORZ021-022.
Frost Advisory from 11 PM this evening to 9 AM PST Sunday for
ORZ021.
Freeze Warning from 11 PM this evening to 9 AM PST Sunday for
ORZ021.
Air Stagnation Advisory until 4 PM PST Wednesday for ORZ023-024-
026-029>031.
CA...None.
PACIFIC COASTAL WATERS...None.
&&
MAS/BMS/TADThe national radar mosaic for the moment the first event began.
2 sneakerwave. Local standard time, as filed.
Short period southerly wind waves combined with a longer period westerly swell to produce sneaker waves along the southern Oregon coast.
Short period southerly wind waves combined with a longer period westerly swell to produce sneaker waves along the southern Oregon coast.
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, November 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: 1223747, 1223748.