Severe Thunderstorm Warning 17, NWS Hanford, CA

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
225 PM PDT Mon Sep 11 2017

.SYNOPSIS...Showers and thunderstorms will remain possible across
much of the area through Tuesday. Afterward, a cooling trend will
take place through next weekend with below normal temperatures
beginning Thursday.

&&

.DISCUSSION...Scattered showers and thunderstorms continue to
develop this afternoon in the Sierra Nevada, and parts of the SJ
Valley, mainly Fresno County and northward. These storms have
generally been moving pretty quickly towards the northwest, so
flooding appears to be less of a threat for now. However, expect
brief heavy rain, frequent lightning and gusty winds with any
thunderstorm that develops. Also, more isolated thunderstorms are
expected to develop towards the south, or over Kern County through
at least this evening.

The upper-level low continues to remain centered offshore near
the Central CA coast and is slowly moving northward just off the
coast. However, this system will likely move very little over the
next 24-36 hours. This is the dominant feature that is expected
to bring impacts to much of our area through at least Tuesday
evening. There is a chance some areas could see showers and
thunderstorms develop overnight tonight, even in the San Joaquin
Valley. A lingering chance of showers and thunderstorms will
remain over the Sierra Nevada on Wednesday as the upper-low moves
inland over central CA and southern CA by Wednesday evening.

By Thursday, a trough of low pressure and northwest flow will
prevail over the area. This will allow temperatures to fall to
several degrees below average through at least the weekend.
Afterward, a ridge of high is expected to build off the West Coast
and gradually move further inland, while temperatures return to
around average or slightly above.

&&

.AVIATION...
Areas of smoke from wildfires will continue to produce MVFR
visibility over the southern Sierra Nevada and adjacent foothills.
Thunderstorms will be probable over the Southern Sierra Nevada and
Kern county mountains producing local mountain obscurations in heavy
rain and gusty winds. Isolated thunderstorms possible across the
Kern Desert and San Joaquin Valley with gusty winds and locally
heavy rain. Otherwise, VFR conditions can be expected over the
Central CA Interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Monday September 11 2017... Unhealthy for sensitive groups in
Fresno... Kern... Kings... Madera and Tulare Counties and Sequoia
National Park and Forest.
Further information is available at Valleyair.org

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is medium.
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.php for additional information
an/or to provide feedback.

&&

.HNX Watches/Warnings/Advisories...
NONE.
&&

public...BSO
avn/fw...BSO/Riley
synopsis...BSO

weather.gov/hanford

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Special Weather Statement
National Weather Service San Joaquin Valley CA
1131 AM PDT MON SEP 11 2017

CAZ095-097-098-111915-
Kern County Mountains CA-Indian Wells Valley CA-
Tulare County Mountains CA-
1131 AM PDT MON SEP 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KERN AND
SOUTHEASTERN TULARE COUNTIES UNTIL 1215 PM PDT...

At 1130 AM PDT, Doppler radar was tracking a strong thunderstorm over
Ridgecrest, moving northwest at 40 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Ridgecrest, China Lake Acres, Inyokern, Indian Wells Canyon and Bear
Peak.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3565 11764 3555 11763 3548 11782 3591 11818
      3596 11802 3594 11799 3587 11798 3586 11801
      3579 11801 3579 11764 3571 11763 3569 11766
      3568 11761 3566 11761
TIME...MOT...LOC 1830Z 152DEG 35KT 3561 11770

Riley

Special Weather Statement
National Weather Service San Joaquin Valley CA
1209 PM PDT MON SEP 11 2017

CAZ091-112000-
Southwestern San Joaquin Valley CA-
1209 PM PDT MON SEP 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL KERN COUNTY UNTIL
100 PM PDT...

At 1208 PM PDT, Doppler radar was tracking a strong thunderstorm over
McKittrick, or 34 miles west of Bakersfield, moving northwest at 30
mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
McKittrick, Derby Acres, Belridge and Twisselman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3526 11967 3526 11978 3528 11981 3535 11981
      3535 11988 3544 11988 3544 12000 3546 12000
      3565 11979 3535 11949 3520 11966
TIME...MOT...LOC 1908Z 129DEG 24KT 3531 11961

Riley

Special Weather Statement
National Weather Service San Joaquin Valley CA
253 PM PDT MON SEP 11 2017

CAZ095-099-112245-
Kern County Mountains CA-Southeastern Kern County Desert CA-
253 PM PDT MON SEP 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KERN COUNTY UNTIL
345 PM PDT...

At 252 PM PDT, Doppler radar was tracking a strong thunderstorm 10
miles east of Tehachapi, or 32 miles north of Lancaster, moving north
at 15 mph.

Winds in excess of 30 mph and brief heavy rain will be possible with
this storm.

Locations impacted include...
Tehachapi, Golden Hills and Mojave.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3499 11824 3517 11850 3532 11827 3512 11806
TIME...MOT...LOC 2152Z 160DEG 13KT 3516 11826

BSO

Special Weather Statement
National Weather Service San Joaquin Valley CA
306 PM PDT MON SEP 11 2017

CAZ090-093-112245-
Mariposa, Madera, and Fresno County Foothills CA-East-
Central San Joaquin Valley CA-
306 PM PDT MON SEP 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FRESNO COUNTY UNTIL 345
PM PDT...

At 306 PM PDT, Doppler radar was tracking a strong thunderstorm 12
miles northeast of Sanger, or 16 miles east of Clovis, moving
northwest at 35 mph.

Winds in excess of 30 mph and brief heavy rainfall will be possible
with this storm.

Locations impacted include...
Fancher Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3676 11926 3670 11942 3692 11961 3703 11944
TIME...MOT...LOC 2206Z 152DEG 29KT 3683 11940

BSO