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COLD WEATHER SYSTEMS TO AFFECT SOUTHWESTERN CALIFORNIA THIS

NATIONAL WEATHER SERVICE SAN DIEGO CA
945 AM PST SUN MAR 5 2006

CAZ042-043-048-050-055>058-060>062-061200-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
945 AM PST SUN MAR 5 2006

...COLD WEATHER SYSTEMS TO AFFECT SOUTHWESTERN CALIFORNIA THIS
WEEK...

A SERIES OF COLD WEATHER SYSTEMS WILL MOVE THROUGH SOUTHWESTERN
CALIFORNIA THIS WEEK. THE FIRST COLD FRONT WILL MOVE THROUGH MONDAY
AFTERNOON AND EVENING. SHOWERS WILL BECOME LIKELY OVER AND WEST OF
THE MOUNTAINS IN ORANGE...SAN BERNARDINO AND RIVERSIDE COUNTIES
MONDAY AFTERNOON AND THEN SPREAD INTO SAN DIEGO COUNTY DURING THE
LATE AFTERNOON AND EVENING. ANOTHER UPPER LEVEL WEATHER DISTURBANCE
WILL CAUSE A SMALL CHANCE OF SHOWERS TO LINGER INTO TUESDAY.

RAINFALL TOTALS MONDAY AND MONDAY NIGHT SHOULD GENERALLY BE LESS
THAN A QUARTER OF AN INCH AT THE LOWER ELEVATIONS. HOWEVER...THE
SOUTHWEST FACING SLOPES OF THE SAN BERNARDINO MOUNTAINS AND PARTS OF
ORANGE COUNTY NEAR THE FOOTHILLS COULD GET LOCALLY HALF TO ONE INCH
WITH UP TO A THIRD OF AN INCH ELSEWHERE IN THE MOUNTAINS. THE SNOW
LEVEL WILL BE 6000 TO 6500 FEET WITH LOCAL SNOW ACCUMULATIONS OF A
COUPLE OF INCHES IN THE SAN BERNARDINO MOUNTAINS AND UP TO AN INCH
IN THE RIVERSIDE COUNTY MOUNTAINS. LOCAL STRONG GUSTY WINDS WILL
ACCOMPANY THIS SYSTEM...MAINLY IN THE MOUNTAINS AND HIGH DESERTS.
THERE WILL ALSO BE PATCHY DENSE FOG IN THE MOUNTAINS. THE RAIN COULD
CAUSE LOCAL MUD OR ROCK SLIDES IN STEEP TERRAIN AND DEBRIS FLOW IN
AND BELOW RECENTLY BURNED AREAS.

ANOTHER COLDER UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE INTO THE
AREA TOWARD THE END OF THE WEEK. THIS WILL BRING COLD WEATHER WITH
LOW SNOW LEVELS ALONG WITH LOCAL STRONG GUSTY WINDS IN THE MOUNTAINS
AND DESERTS AT TIMES FRIDAY THROUGH THE WEEKEND. HOWEVER...THE EXACT
TIMING REMAINS UNCERTAIN. THERE COULD BE LOCAL SNOW IN THE HIGH
DESERTS NEAR APPLE VALLEY AND HESPERIA AND IN MOUNTAIN
FOOTHILLS...INCLUDING THE CAJON PASS. THIS SYSTEM DOES NOT LOOK LIKE
A LARGE PRECIPITATION PRODUCER SO RAIN AND SNOW ACCUMULATIONS SHOULD
REMAIN RELATIVELY LIGHT.

THE COMBINATION OF RAIN...MOUNTAIN SNOW AND FOG...AND LOCAL GUSTY
WINDS WILL MAKE DRIVING HAZARDOUS DURING THE EARLY AND LATER PART OF
THIS WEEK. THE COLD WEATHER TOWARD THE END OF THE WEEK COULD BE
DEADLY FOR UNPREPARED HIKERS OR CAMPERS IN REMOTE AREAS. ALL
INTERESTS SHOULD KEEP INFORMED THIS DEVELOPING COLD WEATHER.

$$

ATKIN





EDIS-03-05-06 0946 PST