High Wind in California, September 7, 2019

Name: High Wind in California, September 7, 2019
Start: 2019-09-07T19:26
End: 2019-09-07T19:32
Location: California

September 7, 2019 · NWS HNX · 3 events in 3 counties and zones

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 3

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.

September 2019 began on the warm side as temperatures were well above normal on each of the first six days of the month due to persistent ridging over the Desert Southwest. Tropical moisture pushed northward into central California on the back side of the ridge during this period and provided for some afternoon and evening thunderstorms each day mainly impacting the mountains and Kern County Deserts each day between the 2nd and the 5th although there were no reports of flooding or damage from there storms. A cooling and drying trend took place on September 7 and 8 as an upper trough pushed through the region. This trough brought a period of increased winds to the area between the afternoon of September 7 through the morning of September 8. Wind advisories were issued for the San Joaquin Valley where several stations reported gusts between 35 and 40 mph and for the Tehachapi area and Kern County Deserts where several stations reported gusts exceeding 45 mph and a few low impact indicator sites had gusts around 60 mph. There were no reports of significant damage from this event however.

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 Sep 7, 2:02 PM PST, 5 hours 24 minutes earlier.

Area forecast discussion, Sep 7, 2:02 PM PST, 5 hours 24 minutes before

Area Forecast Discussion
National Weather Service Hanford CA
302 PM PDT Sat Sep 7 2019

.SYNOPSIS...
Dry conditions and further cooling will occur through Sunday along
with gusty winds. Temperatures through Wednesday will remain below
normal for the first half of September. A warming trend will occur
later in the week with dry weather continuing.

&&

.DISCUSSION...
An upper trough just off the northern California coast is ushering
in cooler weather this afternoon. 24 hour trends show temperatures
are running down from just a couple degrees from Fresno County
southward to as much as 10 degrees lower in Merced County. The
Fort Ord Profiler shows the marine layer depth has ramped up over
3000 feet, hence the cooler air pushing into Merced County first.
A tightening pressure gradient is creating gusty winds across the
coastal passes and breezy to gusty conditions will develop across
much of the San Joaquin Valley this evening. Gusty winds are also
developing in the Kern County Mountain passes. A Wind Advisory is
in effect for the West Side Hills and much of the SJ Valley through
2 AM Sunday. A Wind Advisory for the Kern County Mountain passes
into the Desert is in effect from 5 PM today through 5 AM Monday.

The trough axis moves through overnight with a dry and cooler
northwesterly flow aloft on Sunday. Maximum temperatures Sunday
are forecast to be around 5-10 degrees below climatological norms
for early September. Little changes are expected on Monday then a
reinforcing surge of cooler air will lower temps a bit more on
Tuesday. High temperatures are forecast to be around 80 degrees
for much of the SJV on Tuesday. Temperatures then begin to trend
upwards Wednesday with highs back to near normal by Thursday and
then a little above normal next Friday and Saturday. Dry weather
will prevail through at least the next week.

&&

.AVIATION...
Gusty winds could create localized MVFR or lower conditions in
blowing dust across the San Joaquin Valley through this evening,
and throughout the weekend in the Kern County Desert. Otherwise,
VFR conditions will prevail across the Central California interior
for at least the next 24 hours.

&&

.AIR QUALITY ISSUES...
None.

&&

.CERTAINTY...

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

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 2 AM PDT Sunday for CAZ179>188.

Wind Advisory from 5 PM this afternoon to 5 AM PDT Monday for
CAZ196-198-199.

&&

public...DCH
aviation....DCH

weather.gov/hanford

Event by event

3 high wind. Local standard time, as filed.

High Wind, Indian Wells Valley

When: September 7, 7:26 PM PST
Where: Indian Wells Valley forecast zone
Measured: 50 kt (58 mph) measured gust
Reported by: RAWS

The Indian Wells Canyon RAWS measured a peak wind gust of 58 mph.

High Wind, Tehachapi Area

When: September 7, 7:27 PM PST
Where: Tehachapi Area forecast zone
Measured: 55 kt (63 mph) measured gust
Reported by: RAWS

The Bird Springs Pass RAWS measured a peak wind gust of 63 mph.

High Wind, Lake Isabella

When: September 7, 7:32 PM PST
Where: Lake Isabella forecast zone
Measured: 51 kt (59 mph) measured gust
Reported by: RAWS

The Blue Max RAWS measured a peak wind gust of 59 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

Every storm in California in 2019 Every state in 2019 This day in weather history Warnings in California, September 2019

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: 843877, 843875, 843876.