Storm Summary Number 03 for Atmospheric River in California and
Nevada
NWS Weather Prediction Center College Park MD
700 AM PST Sat Mar 11 2023

...Significant flooding and winter storm conditions continue
across central California and western Nevada...

Numerous Flood Watches, Flood Warnings and Flash Flood Warnings
are in effect across northern and central California and western
Nevada.

Avalanche Warnings are in effect for portions of the Shasta
Siskiyous.

Winter Storm Warnings are in effect along the Sierra Nevada range.

High Wind Warnings and Wind Advisories are in effect for portions
of the Mojave Desert in California.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see www.weather.gov

At 600 AM PST...Current surface observations and NWS Radar imagery
show scattered showers with limited rainfall rates, mostly across
northern California and Nevada. Additionally, the western slopes
of the Sierra Nevada is continuing to see snowfall, mostly
associated with flow being forced over the high terrain. The
majority of the current precipitation is occurring north of an
east-west warm frontal boundary across central California and
Nevada, separating warm, moist air to the south and cooler, drier
air to the north.

...Selected preliminary Storm Total Snowfall in inches from 700 AM
PST Thu Mar 09 through 600 AM PST Sat Mar 11...

...CALIFORNIA...
CARRVILLE 1 N                        24.0                    
MAMMOTH MOUNTAIN SKI BA              15.0                    
SUGAR BOWL SKI RESORT                12.0                    

...NEVADA...
MT ROSE SKI BASE                     14.0                    

...Selected preliminary Storm Total Rainfall in inches from 700 AM
PST Thu Mar 09 through 600 AM PST Sat Mar 11...

...CALIFORNIA...
PEPPERMINT                          12.93                    
ROCKY BUTTE                         11.58                    
THREE PEAKS                          9.89                    
MOUNTAIN HOME NEAR CAMP NELSON       9.80                    
SPRINGVILLE TULE POWERPLANT          9.80                    
CHALK PEAK                           9.38                    
NATURE POINT NEAR BASS LAKE          9.24                    
BLACK SPRINGS NEAR BIG MEADOWS 5 SW  9.07                    
WESTFALL NEAR MARAPOSA 16 SE         9.07                    
NATURE POINT NEAR BASS LAKE 11 ENE   8.24                    
GROVELAND 20 NE                      8.14                    
TAMARACK SUMMIT SHAVER LAKE 9 NE     7.92                    
YOSEMITE VILLAGE 1 NNW               7.70                    
ALTA SIERRA 3 NNW                    7.68                    
JERSEYDALE                           7.68                    
JOHNSONDALE 6 NNW                    7.63                    
ASH MOUNTAIN                         7.62                    
SANTA MARGARITA 2 SW                 7.52                    
UPPER TORO                           7.33                    
OAK OPENING                          7.31                    
DW7894 LOS GATOS                     7.07                    
EW8163 HUME                          7.03                    
BIG SUR                              6.76                    
RIDER ROAD                           6.58                    
MOUNT MADONNA                        6.11                    
OAK CREEK                            5.85                    
BEN LOMMOND                          5.81                    
TRIMMER 12 E                         5.64                    
WHALE POINT                          5.55                    
LAS TABLAS                           5.47                    
FOUR TREES NEAR PARADISE 15 ENE      4.88                    
EW8483 CAZADERO                      4.79                    
LOPEZ DAM                            4.75                    
DOWNIEVILLE NEAR SIERRA CITY 10 W    4.67                    
MAHOGANY NEAR KERNVILLE 22 NE        4.60                    
VENADO                               4.55                    
MIDDLE PEAK                          4.48                    
MAD RIVER 12 SE                      4.40                    
MORATTINI FLAT                       4.18                    
HONEYDEW                             4.12                    
COOSKIE MOUNTAIN                     3.97                    
HELL HOLE                            3.89                    
RED ROCK MOUNTAIN 10 WNW             3.68                    
LA GRANADA MOUNTAIN                  3.19                    
SHELL PEAK                           2.79                    

...NEVADA...
ASH CANYON UPPER                     8.54                    
SHERIDAN                             3.38                    
MUSGROVE CREEK                       3.10                    
GENOA                                3.05                    
KQ7A GARDENERVILLE                   3.01                    
LITTLE VALLEY                        2.99                    
DIAMOND PEAK 2 ESE                   2.82                    

...Selected preliminary Peak Wind gusts in miles per hour earlier
in the event...

...CALIFORNIA...
MAMMOTH MOUNTAIN 1 NNW                102                    
TRUCKEE 4 WNW                          86                    

...NEVADA...
MOUNT ROSE SUMMIT 1 ESE                82                    
VERDI 2 SSE                            76                    


Precipitation associated with this Atmospheric River event is
generally on a downward trend, as the low pressure system
associated with this event moves across the High Plains today.
However, a Slight Risk for Excessive Rainfall is in effect today
across portions of central California, given a combination of
enhanced rainfall rates (up to 0.5"/hr) and antecedent soil
moisture conditions. Snow levels will continue to be relatively
high, given that this is a relatively warm system, with only the
higher peaks of the Sierra Nevada forecast to accumulate any
snowfall. Otherwise, a melting snowpack will continue to impact
rivers, which may contribute to flooding downstream. In the longer
term, another Atmospheric River is forecast to begin to enter the
area early next week, yet another powerful system to impact the
region this winter.

This will be the last Storm Summary issued by the Weather
Prediction Center for this event. Please refer to your local
National Weather service office for additional information.

Genz