The Weather Prediction Center

College Park, MD

Storm Summary Message

Storm Summary Number 01 for California Atmospheric River
NWS Weather Prediction Center College Park MD
700 PM PST Sun Feb 04 2024

...Strong atmospheric river producing life threatening heavy
rain,flash flooding, mountain snow, and high winds across

Flood Watches are in effect across much of Central and Southern

Winter Storm Warnings are in effect atop the California Cascades
and Sierra Nevada.

High Wind Warnings are in effect across much of Central and
Southern California.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see

At 600 PM PST...An area of low pressure was located off the
California coast with a minimum central pressure of 978 mb (28.88
in Hg) at a latitude of 37N and a longitude of 125 W. A cold front
extended from the area of low pressure through coastal portions of
central California.

...Selected preliminary Storm Total Rainfall in inches from 700 AM
PST Sun Feb 04 through 600 PM PST Sun Feb 04...

MATILIJA CANYON                      5.91                    
EL DESEO                             5.67                    
OLD MAN MOUNTAIN                     5.67                    
HOLLISTER                            4.81                    
CACHUMA DAM                          4.70                    
RANCHO SAN JULIAN                    4.53                    
ORTEGA HILL                          4.00                    
SANTA BARBARA                        3.35                    
AGOURA HILLS                         2.61                    
SANTA CRUZ ISLAND                    2.32                    
BIG SUR                              1.99                    
BEL AIR                              1.39                    
SAN FRANCISO INTERNATIONAL           1.29                    
LOS ANGELES                          1.18                    
BEVERLY HILLS                        1.12                    
PASADENA                             1.10                    

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

LAGUNITAS FOREST                      102                    
SANTA CLARA                            98                    
INVERNESS                              89                    
SPRING VALLEY                          65                    
OAKLAND INTERNATIONAL                  60                    
SAN FRANCISCO INTERNATIONAL            58                    
SAGUS                                  50                    
SAN LUIS                               50                    
CATALINA AIRPORT                       49                    
MORMON ROCK                            46                    
OAKLAND NORTH                          46                    
SACRAMENTO AIRPORT                     46                    
MALIBU HILLS                           40                    
SANRA YNEZ                             37                    
WATSONVILLE                            35                    
PEPPERDINE                             33                    
SANTA BARBARA                          23                    

Heavy rain is expected into tomorrow for much of California, with
rainfall amounts of 3-6" (locally 8-14") forecast in parts of
Southern California. This will result in locally catastrophic
flash and urban flooding impacts across Los Angeles. The impacts
do not stop there, however. Damaging winds and high surf are also
expected across Southern California tonight, likely leading to
power outages and downed trees. In the mountains, heavy wet snow
will continue across the Sierra Nevada through Monday. 2-3"/hour
snowfall rates combined with wind gusts will lead to whiteout
conditions and near impossible travel above 5000 feet.

The next Storm Summary will be issued by the Weather Prediction
Center at 700 AM PST. Please refer to your local National Weather
Service office for additional information on this event.


Last Updated: 944 PM EST SUN FEB 04 2024