A longwave trough passing over the northwestern US caused west winds to increase over the San Gorgonio Pass on April 28th.
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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 SGX wrote it up.
A longwave trough passing over the northwestern US caused west winds to increase over the San Gorgonio Pass on April 28th.
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 San Diego, CA wrote its last area forecast discussion before the first event at Apr 28, 1:25 AM PST, 5 hours 35 minutes earlier.
Area Forecast Discussion
National Weather Service San Diego CA
225 AM PDT Thu Apr 28 2022
.SYNOPSIS...
A deep marine layer will bring patchy drizzle and cloudy skies
this morning west of the mountains. As sunshine returns this
afternoon, gusty westerly winds will increase across the
mountains and deserts through tonight. Fair and warmer weather
Friday and Saturday will be followed by several troughs of low
pressure next week. These will continue the cooler weather along
with occasional winds.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
The marine layer has deepened considerably and low clouds have now
covered the entire coastal basin. The clouds have reached into
mountain passes, topping out at about 4,000 feet so far. The cloud
bases are hovering between 1,500 and 2,000 feet, meaning the
cloud is thick enough for patchy drizzle this morning. A trough of
low pressure will pass through California today and is ultimately
responsible for our currently energetic coastal eddy and marine
layer. The clouds will mostly clear today, but with some residual
cumulus against the mountains later on. Winds in the mountains and
deserts will increase with top gusts 45-55 mph, strongest in the
west-east corridors of mountain passes into adjacent deserts. A
wind advisory is in place this afternoon through tonight. Some
spots should get some blowing dust. A touch of offshore flow
develops Friday morning and the cold air from the trough erodes
the marine inversion. Areas of low clouds are expected in the
coastal basin tonight into Friday, but won't amount to much. The
coastal eddy will persist, but few low clouds are expected
Saturday morning too under the weakened inversion. Fair and warmer
weather is expected Friday and Saturday with daytime temperatures
creeping back to normal, or a little above in the lower deserts.
The next shortwave trough dives into the West Saturday night and
Sunday, followed by the next one Monday night and Tuesday. This
will keep our lower atmosphere rather mixed and the marine
inversion weak. That will mean only partly to locally mostly
cloudy nights and mornings and plenty of sunshine. Temperatures
will remain just below average while all these troughs dominate
the western weather picture. None of these troughs appear very
strong, it being May, but they should serve to boost winds in the
mountains and deserts each afternoon and evening. This longwave
trough pattern will keep things fair, breezy and cool through
Wednesday, but there are hints that the troughs could take a break
and allow a weak ridge to take a turn controlling our weather
thereafter.
&&
.AVIATION...
280900Z...Coast/Valleys...BKN/OVC low clouds will continue far into
the inland valleys through this morning, with bases of 1500-2500 FT
MSL, and tops to 3500 ft MSL with areas of higher terrain obscured
in clouds, and local vis down to 1-2 nautical miles in BR in the
valleys. Most areas will clear by 19Z (noontime today). Renewed CIGS
will redevelop this afternoon around 02-04Z.
Mountains/Deserts...Mostly clear skies with mostly unrestricted VIS
will continue through Friday. except through the passes where low
clouds and fog will be possible this morning, and again late tonight
and Friday morning.
Areas of west surface winds will continue through this evening from
the mountain crests east through the desert slopes and into the
deserts with gusts 35-45 knots, along with areas of strong
up/downdrafts, LLWS and local vis restriction down to 1 nautical
miles possible at times in blowing dust and sand in the desert areas.
&&
.MARINE...
Wind gusts around 20 knots will be likely through this evening,
especially in the outer coastal waters. Local seas of 6-8 feet with
a period around 8 seconds will create choppy seas in the outer
coastal waters at times through tonight.
&&
.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory from 1 PM this afternoon to midnight PDT tonight
for Riverside County Mountains-San Diego County Deserts-San
Diego County Mountains-San Gorgonio Pass Near Banning.
PZ...NONE.
&&
PUBLIC...MM
AVIATION/MARINE...BrothertonThe national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
West winds increased and became gusty over the San Gorgonio Pass on April 28th. Wind gusts of 45-55 mph were common, along with localized higher gusts. The Whitewater RAWS site recorded a peak wind gust of 63 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2022Every state in 2022This day in weather historyWarnings in California, April 2022
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: 1019560.