Severe Thunderstorm Warning 31, NWS Sacramento, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
910 AM PST SUN NOV 9 2003

.DISCUSSION...CORNUCOPIA OF WEATHER GOING ON TODAY.  MOST IMMEDIATE IS
THE DEEP AND MOIST CONVECTIVE ACTIVITY THAT HAS GOOD POTENTIAL TO FIRE
UP WITHIN THE NEXT FEW HOURS ACROSS OUR LOWER ELEVATIONS.  AS A MATTER
OF FACT LOOKING AT THE INSTABILITY INDICES AND K-INDEX VALUES IT LOOKS
LIKE WE COULD CONTINUE TO HAVE A THREAT OF ISOLATED THUNDERSTORMS OVER
THE VALLEYS AND DELTA ON INTO MONDAY MORNING.  WILL INCLUDE THAT IN MY
MID-DAY UPDATE, WHEN A DECISION IS MADE TO EITHER EXTEND OR EXPIRE ANY
OR ALL OF THE SNOW ADVISORIES & WINTER STORM WARNINGS THAT ARE WE HAVE
OUT AT THIS TIME.  LIMITED SNOWFALL TOTALS ARE TRICKLING IN, BUT LOOKS
LIKE WE GOT ANYWHERE FROM 8 INCHES TO A COUPLE OF FEET OVER THE HIGHER
ELEVATIONS OF THE WEST SLOPES OF THE NORTHERN SIERRA NEVADA, WITH SOME
INDICATION OF SIGNIFICANT ACCUMULATIONS OVER THE NORTHERN MOUNTAINS AS
WELL. WILL LIKELY HOLD OFF ON ANY UPDATES UNTIL THE NOON DECISION HOUR.

&&

.STO WATCHES/WARNINGS/ADVISORIES...SNOW ADVISORY THROUGH MID-DAY TODAY
                                   FOR THE MOUNTAINS OF SHASTA COUNTY
                                   SOUTHWARD TO THE MOUNTAINS OF NORTH
                                   LAKE COUNTY.

                                ...WINTER STORM WARNING THROUGH MID-DAY
                                   TODAY FOR THE MOUNTAINS OF WESTERN
                                   PLUMAS COUNTY INCLUDING LASSEN PARK
                                   AND WEST SLOPES OF NORTHERN SIERRA.

&&
RANDY HARTLEY

CAZ013>019-063-064-066>069-101500-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SACRAMENTO CA
700 AM PST SUN NOV 9 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA.

.DAY ONE...TODAY

A LOW PRESSURE SYSTEM OFF THE FAR NORTHERN CALIFORNIA COAST WILL
BRING PERIODS OF RAIN AND MOUNTAIN SNOW FOR NORTHERN CALIFORNIA
TODAY THROUGH TONIGHT. THE HEAVIEST SNOWFALL WILL OCCUR DURING THE
FIRST HALF OF THE DAY TODAY.  THIS STORM WILL LIKELY PRODUCE SEVERAL
INCHES OF NEW SNOW FOR MOUNTAIN LOCATIONS.  ISOLATED THUNDERSTORMS
ARE ALSO POSSIBLE TODAY.

* SNOW ADVISORY...............SEE WWUS46 KSTO - WSWSTO FOR DETAILS *
* WINTER STORM WARNING........SEE WWUS46 KSTO - WSWSTO FOR DETAILS *

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A FEW ISOLATED SHOWERS ARE POSSIBLE EARLY MONDAY. DRY WEATHER WITH
POSSIBLE LATE NIGHT AND MORNING DENSE VALLEY FOG CAN BE EXPECTED
FROM TUESDAY THROUGH THURSDAY.

THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET
AT (LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/SACRAMENTO

LAM

CAZ016<019-091800-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
830 AM PST SUN NOV 9 2003

...STRONG THUNDERSTORMS POSSIBLE LATER THIS MORNING AND THIS
AFTERNOON ACROSS THE SOUTH HALF OF THE SACRAMENTO VALLEY...DELTA...
AND NORTHERN SAN JOAQUIN VALLEY...

A VERY UNSTABLE AIRMASS LIES ACROSS NORTHERN CALIFORNIA THIS MORNING
FOLLOWING THE PASSAGE OF THE COLD FRONT LAST EVENING. WITH BREAKS IN
CLOUD COVER ALLOWING SUNSHINE TO HEAT THE GROUND...THE AIRMASS OVER
THE REGION WILL BECOME INCREASINGLY UNSTABLE THROUGH THE MIDDAY
HOURS. IN ADDITION...THE PRESENCE OF A STRONG JET STREAM OVERHEAD
AND LOW-LEVEL WIND SHEAR ADD TO THE POTENTIAL FOR STRONG...AND
PERHAPS A FEW SEVERE THUNDERSTORMS LATER THIS MORNING AND THIS
AFTERNOON. THE PRIMARY THREATS FROM STORMS ARE EXPECTED TO BE STRONG
WINDS AND HAIL...HOWEVER...ISOLATED TORNADOS CANNOT BE RULED OUT.

RESIDENTS OF THE SOUTH HALF OF THE SACRAMENTO VALLEY...DELTA...AND
NORTHERN SAN JOAQUIN VALLEY ARE ADVISED TO REMAIN ALERT FOR RAPID
CHANGES IN THE WEATHER TODAY. BE READY TO SEEK SHELTER IN A STURDY
BUILDING IF DANGEROUS WEATHER APPROACHES.