Flash Flood Warning 14, NWS Hanford, CA

Area Forecast Discussion
National Weather Service Hanford CA
158 AM PST Fri Mar 10 2023

.SYNOPSIS...
The atmospheric river event started this afternoon for our CWA and
will continue through Sunday, with the heaviest rainfall this
morning and afternoon. Most of the rainfall will occur in the
Sierra Nevada below 8000ft and the foothills, with lighter
rainfall in the eastern valley, and the lightest rainfall in the
western valley. This rain may cause flooding in the foothills and
Sierra Nevada as the established snow melts. Another system may
come in after this one, begining on Monday and dissipating by
Thursday.

&&

.DISCUSSION...
An upper level trough off the northwest coast of the U.S. has
continued to pull warm and moist air from the subtropics and push
it into the California coast. This atmospheric river has already
started to impact our CWA, with rainfall from the valley to the
mountains below 8000ft. Snow will also impact the mountains above
7000ft. Most of the precipitation will fall this morning and
afternoon, and will taper off by Sunday night.

Here's the lastest 4.1 NBM probabilites for 4" of rain or more at
some of our mountain and foothills locations from 10 PM on
Thursday to 10 PM on Friday:

Shaver Lake: 76%
Wawona: 71%
Yosemite Valley: 56%
North Fork: 46%
El Portal: 41%
Mariposa: 31%
Oakhurst: 31%

This will greatly impact these areas as the recent snowfall will
be rained on and rapidly melt, leading to flooding for the local
rivers and streams. Flooding is also possible on roads, use
caution and do not drive over flooded roads, as your vehicle may
be washed away. High winds are also likely in the lower Mojave
desert and the Central San Joaquin Valley north of Kings County
until this afternoon and into tonight.

Another system will likely come in on Monday morning and
continue until Wednesday night. This may bring rain and high
elevation snow. Snow levels may begin around 7000ft and rise to
around 8000ft for this event. Guidence is begining to show some
calmer weather by next Friday, confidence will increase as more
data is gathered.

&&

.AVIATION...
The San Joaquin Valley can see areas of MVFR conditions in
showers and IFR conditions are possible in mountains due to
precipitation. This will continue as te system passes through this
morning through to tonight.

&&

.AIR QUALITY ISSUES...
None.

&&

.CERTAINTY...

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

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
Wind Advisory from 6 AM this morning to 10 PM PST this evening
for CAZ337-339.

Flood Watch through Sunday morning for CAZ300>336.

Wind Advisory until 4 PM PST this afternoon for CAZ300>306-317-
318.

Winter Storm Warning until 10 AM PDT Sunday for CAZ323-326>331.

&&

public...EW
aviation....EW

weather.gov/hanford

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1017 AM PST FRI MAR 10 2023

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

0821 AM     FLOOD            2 SSW TULARE            36.17N 119.36W
03/10/2023                   TULARE             CA   LAW ENFORCEMENT

            CHP REPORTS FLOODING ON W ADDLE AVE AT S
            PRATT ST.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1019 AM PST FRI MAR 10 2023

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

0821 AM     FLOOD            5 SW SHAVER LAKE        37.05N 119.37W
03/10/2023                   FRESNO             CA   LAW ENFORCEMENT

            CHP REPORTS 10-20 FOOT MUDSLIDE ON PETERSON
            RD AT TOLLHOUSE RD.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1021 AM PST FRI MAR 10 2023

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

0824 AM     FLOOD            4 NW SQUAW VALLEY       36.74N 119.23W
03/10/2023                   FRESNO             CA   LAW ENFORCEMENT

            CHP REPORTS MUD, DIRT AND/OR ROCK ON SR 180
            EAST OF INDIAN GUIDE. ROAD CLOSED.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1022 AM PST FRI MAR 10 2023

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

0827 AM     FLOOD            3 SW GRANT GROVE        36.72N 119.00W
03/10/2023                   FRESNO             CA   LAW ENFORCEMENT

            CHP REPORTS ROCKSLIDE BLOCKING BOTH
            DIRECTIONS OF SR 180 AT SR 245.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1024 AM PST FRI MAR 10 2023

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

0835 AM     FLOOD            7 SSE ORANGE COVE       36.54N 119.25W
03/10/2023                   TULARE             CA   LAW ENFORCEMENT

            CHP REPORTS FOOT DEEP WATER ON ROAD 144 AT
            AVENUE 142.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HANFORD CA
1025 AM PST FRI MAR 10 2023

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

0839 AM     FLOOD            5 E AUBERRY             37.07N 119.40W
03/10/2023                   FRESNO             CA   LAW ENFORCEMENT

            CHP REPORTS ROCK SLIDE BLOCKING EB LANE OF
            AUBERRY RD WEST OF ALDER SPRINGS INCLUDING A
            5 TO 6 FOOT BOULDER.

&&