Alert archive / California / Winter Weather Advisories in 2011

Winter Weather Advisory 13, NWS San Diego, CA

November 20, 2011Riverside County, San Bernardino County, California

NWS San Diego, CA issued this winter weather advisory at Nov 20, 2011, 2:25 AM PST for Riverside County, San Bernardino County, California. It took effect at Nov 20, 2011, 12:00 PM PST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Nov 20, 2011, 2:25 AM PST (10:25 UTC)
In effect from
Nov 20, 2011, 12:00 PM PST
Expired
Nov 21, 2011, 1:41 AM PST
In force
14 hr
Issued by
NWS San Diego, CA

Counties Riverside County, CA, San Bernardino County, CA

The radar

The Santa Ana Mts radar (KSOX), 152 km from the middle of the area, began a volume at 10:25 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Diego, CA wrote its last area forecast discussion before this winter weather advisory went out at Nov 19, 2:00 PM PST, 12 hours 25 minutes earlier.

Area forecast discussion, Nov 19, 2:00 PM PST, 12 hours 25 minutes before
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Hazardous weather outlook, Nov 19, 4:56 AM PST, 21 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
456 AM PST SAT NOV 19 2011

CAZ042-043-048-050-055>058-060>062-PZZ750-775-201400-
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-
COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT
30 NM-
WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO
60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
456 AM PST SAT NOV 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF EXTREME SOUTHWESTERN
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

FOR SUNDAY THROUGH EARLY MONDAY...A PACIFIC STORM SYSTEM FROM THE
NORTHWEST IS EXPECTED TO MOVE INLAND ACROSS SOUTHERN CALIFORNIA
AND NORTHERN BAJA BRINGING MODERATE PRECIPITATION AMOUNTS AND
GUSTY WINDS. GREATEST AMOUNTS ARE EXPECTED SUNDAY AFTERNOON AND
EVENING. RAINFALL AMOUNTS COULD RANGE FROM ONE QUARTER TO ONE HALF
INCH AT THE COAST TO ONE HALF TO ONE INCH ON THE COASTAL MOUNTAINS
SLOPES. ONE QUARTER INCH OR LESS IS EXPECTED IN THE UPPER DESERTS
AND ONE TENTH INCH OR LESS IN THE LOWER DESERTS. THERE IS A SLIGHT
CHANCE OF THUNDERSTORMS LATE SUNDAY AFTERNOON INTO SUNDAY EVENING
AS THE COLDEST MID LEVEL AIR MOVES ACROSS SOUTHERN CALIFORNIA
DESTABILIZING THE ATMOSPHERE. IN THE HIGHER ELEVATIONS OF THE SAN
BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS...SEVERAL INCHES OF
SNOWFALL IS POSSIBLE SUNDAY AFTERNOON AND EVENING...MAINLY ABOVE
5500 TO 6000 FEET.

ANOTHER PACIFIC STORM SYSTEM OF MODERATE INTENSITY IS POSSIBLE ON
THANKSGIVING.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...
HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT
WEATHER CONDITIONS.

MARTIN

Nearby

Winter Weather Advisories in California, 2011Every winter weather advisory in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.