In the wake of a late season storm, strong and gusty northwest to north winds developed across southwestern California. Across the mountains and local deserts, wind gusts between 58 and 65 MPH were reported.
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 LOX wrote it up.
In the wake of a late season storm, strong and gusty northwest to north winds developed across southwestern California. Across the mountains and local deserts, wind gusts between 58 and 65 MPH were reported.
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 Los Angeles, CA wrote its last area forecast discussion before the first event at Mar 27, 12:46 PM PST, 1 hour 14 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
146 PM PDT Mon Mar 27 2017
.SYNOPSIS...
Strong winds will continue tonight then begin to diminish by mid
Tuesday morning. Temperatures will increase through Wednesday. An
approaching low pressure center will cool temperatures by
Thursday.
&&
.SHORT TERM...(TDY-WED)
Strong northwest flow has developed behind a trough that passed
through the area earlier this morning. Good subsisidence is also
helping to drive higher winds speeds from aloft down to lower
elevations. Advisory and warning level north to northwest winds
are expected across many areas through tonight before the shift to
Santa Ana northeast winds takes place Tuesday morning. The
northeast winds won't be as strong in most areas as the northwest
winds were, but cross sections of model data through the typical
favored Santa Ana wind areas shows winds near 40kt down to around
850 mb. So while this won't likely be a warning level Santa Ana
event it should at least keep winds in the advisory category
through the morning hours and possibly into early afternoon. So
the 9am expiration of some of the LA/Ventura county advisories
have been extended until 2 pm to account for the Santa Ana winds.
With the trough exiting east and good downslope flow taking place
with the Santa Ana winds most areas, especially west and south of
the mountains will see a sizable jump in temps Tuesday and again
Wednesday. Gradients are actually peaking Wednesday but upper
support wanes as the ridge axis moves overhead. So still some
gusty winds but mostly below advisory levels. Highs will warm up
well into the 80s in the valleys and some lower 90s for the
warmest areas by Wednesday. 70s to lower 80s for coastal zones.
Another trough that will eventually become our next inside slider
will hit nrn California early Thu. This will quickly reverse
gradients and cool temps several degrees Thu afternoon. Northern
areas may see a few clouds from it Thu afternoon but no precip.
May have to watch for some more Grapevine area showers Thu night
but at present models aren't showing much moisture lingering
behind it so will keep forecast dry. But it will initiate another
round of gusty north to northwest winds Thu into Thu night in
many of the same areas as this morning and likely with similar
speeds if it follows the currently expected trajectory.
.LONG TERM...(THU-SUN)
A similar pattern shaping up for the end of the week as we're
seeing in the first half of the week. Strong northwest flow Thu
into early Fri behind the trough with cooling temps, then
shifting to northeast Friday into Saturday for a quick warmup back
into the 80s for the valleys and 70s for coastal zones. Then
cooling again Sunday with the next trough which again appears to
be taking an inside track. Though here the GFS and ECMWF part ways
quite a bit with the EC showing a much faster and weaker trough
passage with virtually no gusty northwest flow behind it. So
somewhat lower confidence as we get later into the weekend but
given the pattern it seems prudent to hold onto the inside sliders
for the time being.
&&
.AVIATION...27/1800Z.
At 1718Z at KLAX...There was no marine inversion.
Low level wind shear is possible just about anywhere today due to
very strong winds and turbulence. All TAF locations are expected
to have VFR conditions through Tuesday.
KLAX...Good confidence in the 18z TAF. There is a 30 percent
chance of north cross winds near 10 knots between 03-09z.
Otherwise, VFR conditions and possible low level wind shear. East
winds, if any, will stay below 7 knots.
KBUR...Good confidence in the 18z TAF. VFR conditions will
prevail with possible low level wind shear.
&&
.MARINE...27/200 PM.
Lots of changes on the marine package. The Gales are still
expected this afternoon, but they are off to a slow start.
Changed the ending time of the gales for the outer waters to 11z
and inner waters to 05z as it does not look like the Gale winds
will stick around any longer than that.
Changed the wave heights in the grids to better match with
surrounding offices and the latest coastal/marine guidance. Still
expecting some rather steep and choppy waves this afternoon into
this evening during the strongest period of winds.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory in effect until 9 PM PDT this evening for zones
34-35. (See LAXNPWLOX).
High Surf Advisory in effect until 2 PM PDT Wednesday for
zones 34-35. (See LAXCFWLOX).
Wind Advisory in effect until 3 AM PDT Tuesday for zone 39. (See LAXNPWLOX).
Wind Advisory in effect until 9 AM PDT Tuesday for zones
41-87. (See LAXNPWLOX).
Wind Advisory in effect until 2 PM PDT Tuesday for zones
44>46-88-547. (See LAXNPWLOX).
Wind Advisory in effect until 3 PM PDT this afternoon for
zones 52>54-59. (See LAXNPWLOX).
High Wind Warning in effect until 3 AM PDT Tuesday for zones
52-59. (See LAXNPWLOX).
High Wind Warning in effect until 9 AM PDT Tuesday for zones
53-54. (See LAXNPWLOX).
Wind Advisory in effect from 9 AM to 2 PM PDT Tuesday for
zones 53-54. (See LAXNPWLOX).
PZ...Gale Warning in effect until 10 PM PDT this evening for zones
645-650-655. (See LAXMWWLOX).
Gale Warning in effect until 4 AM PDT Tuesday for zones
670-673-676. (See LAXMWWLOX).
&&
.HAZARD POTENTIAL OUTLOOK...(WED-SUN)
Another round of strong and gusty northwest to north winds will
be possible Thu night in the mountains and along the Santa Barbara
County south coast, with travel being affected by the winds.
&&
PUBLIC...MW
AVIATION...Sweet
MARINE...Sweet
SYNOPSIS...TF
weather.gov/losangeles4 high wind. Local standard time, as filed.
Strong westerly wind developed across the Antelope Valley. The ASOS at Lancaster reported a wind gust of 59 MPH.
Strong northerly winds developed across the mountains of Los Angeles county. Some peak wind gusts from the local observation network include: Chilao (gust 65 MPH) and Sandberg (gust 63 MPH).
Strong northerly winds developed across the mountains of Ventura county. Wind gusts up to 65 MPH were reported.
Strong northerly winds developed across the mountains of Santa Barbara county. Some peak wind gusts from the local RAWS network include: Montecito (gust 62 MPH) and Tepusquet (gust 59 MPH).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2017Every state in 2017This day in weather historyWarnings in California, March 2017
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: 683363, 683360, 683361, 683362.