California, 2020

High Wind in California, June 28, 2020

June 28, 2020 · NWS HNX · 5 events in 3 counties and zones

A large upper level low pressure system pushed into the Pacific Northwest on June 28 displacing the upper ridge that had been reponsible for several days of widespread triple digit heat over the area. The low pressure system pushed a strong cold front through the area on June 28 producing a period of strong winds gusts over the Kern County Deserts as well as over the Teahachapi and Lake Isabella…

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

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.

What happened

The episode as NWS HNX wrote it up.

A large upper level low pressure system pushed into the Pacific Northwest on June 28 displacing the upper ridge that had been reponsible for several days of widespread triple digit heat over the area. The low pressure system pushed a strong cold front through the area on June 28 producing a period of strong winds gusts over the Kern County Deserts as well as over the Teahachapi and Lake Isabella areas where several stations reported gusts exceeding 50 mph. A few low impact indicator sites in these areas had gusts exceeding 60 mph.

What forecasters said that day

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 Hanford, CA wrote its last area forecast discussion before the first event at Jun 28, 1:05 AM PST, 7 hours 27 minutes earlier.

Area forecast discussion, Jun 28, 1:05 AM PST, 7 hours 27 minutes before
Area Forecast Discussion
National Weather Service Hanford CA
205 AM PDT Sun Jun 28 2020

.SYNOPSIS...A cold front will push through the area today and
bring gusty winds in wind-prone locations through this evening and
much cooler temperatures today and Monday. Temperatures will
rebound slightly beginning on Tuesday.

&&

.DISCUSSION...A large upper low pressure system dropping through
the PAC NW at this time will bring an abrupt end to the
persistent heat that had prevailed over our area over the past
several days. IR imagery is indicating a fairly strong shortwave
dropping southeast across Norcal which is pushing a cold front
across our area this morning and result in much cooler daytime
temperatures than we have been accustomed to recently. In fact,
temepratures across our area today are expected to be below
seasonal averages and with a cooler airmass expected to settle
into our area tonight, daytime temperatures on Tuesday are
expected to be well below normal.

Besides the much cooler temperatures, the change in airmass will
result in a period of increased winds across the wind-prone
portions of our area through this evening. A Wind Advisory
remains in effect for the West Side Hills through this morning and
a Wind Advisory is also in effect for the Kern County Deserts for
this afternoon and evening. The winds are expected to diminish on
Monday as the cooler air settles in. However, there will be
enough instability for a light chance of showers over the higher
elevations of the Sierra Nevada on Monday afternoon.

The low will lift northward across the northern Rocky Mountain
region on Tuesday leaving our area under a dry northwest flow as
our area remains situated in between an offshore ridge and a
negatively tilted tough over the Rockies. Temperatures will
recover on on Tuesday and Wednesday and return to seasonal normals
by Wednesday. The medium range models are in good general
agreement with an upper trough deepening slightly off the PAC NW
coast later in the week resulting in a dry southwest flow over our
area for Thursday through Saturday. Temperatures across our area
are expected to remain close to normal on Thursday and Friday then
rise to slightly above normal levels next weekend with dry
weather prevailing.

&&

.AVIATION...Local MVFR visibility in patchy blowing dust along
the West Side Hills until 18Z Sun and in the Kern County Deserts
between 21Z Sun and 07Z Mon. Otherwise, VFR conditions will
prevail over the central CA interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...Please see SFOAQAHNX for an Air Quality
Alert

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.

Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.html for additional information
an/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 11 AM PDT this morning for CAZ179.

Wind Advisory from 2 PM this afternoon to midnight PDT tonight
for CAZ198-199.

&&

public...DS
aviation....DS

weather.gov/hanford

In the hours before

Local storm report, Jun 28, 8:24 AM PST, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
924 AM PDT SUN JUN 28 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0844 AM     NON-TSTM WND GST 18 SW GUSTINE           37.04N 121.19W
06/28/2020  M56 MPH          MERCED             CA   MESONET

            MESONET STATION AT423 PACHECO STATE PARK.

&&

Event by event

5 high wind. Local standard time, as filed.

High Wind, Lake Isabella

When
June 28, 8:32 AM PST
Where
Lake Isabella forecast zone
Measured
55 kt (63 mph) measured gust
Reported by
RAWS

The Blue Max RAWS measured a peak wind gust of 63 mph.

High Wind, Indian Wells Valley

When
June 28, 11:26 AM PST
Where
Indian Wells Valley forecast zone
Measured
65 kt (75 mph) measured gust
Reported by
RAWS

The Indian Wells Canyon RAWS measured a peak wind gust of 75 mph.

High Wind, Tehachapi Area

When
June 28, 7:27 PM PST
Where
Tehachapi Area forecast zone
Measured
73 kt (84 mph) measured gust
Reported by
RAWS

The Bird Springs Pass RAWS measured a peak wind gust of 84 mph.

High Wind, Lake Isabella

When
June 28, 9:10 PM PST
Where
Lake Isabella forecast zone
Measured
56 kt (64 mph) measured gust
Reported by
RAWS

The Bear Peak RAWS measured a peak wind gust of 65 mph.

High Wind, Tehachapi Area

When
June 28, 9:14 PM PST
Where
Tehachapi Area forecast zone
Measured
57 kt (66 mph) measured gust
Reported by
RAWS

The Jawbone Canyon RAWS measured a peak wind gust of 66 mph.

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2020Every state in 2020This day in weather historyWarnings in California, June 2020

Sources

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: 890026, 890027, 890011, 890024, 890014.