502
AGUS76 KRSA 271348
HMDRSA
HYDROMETEOROLOGICAL DISCUSSION
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
650 AM PDT MON OCT 27 2025
...POSSIBLE LINGERING ISOLATED SHOWERS OVER PARTS OF SRN CA & NV
THIS MORNING WITH DRY CONDITIONS THEN THROUGH AT LEAST FRI AM AS
HIGH PRESSURE BUILDS...
...CHANCES OF PRECIP RETURN LATER FRI/SAT OVER THE NORTH COAST AS A
FRONT MOVES THROUGH THE PNW...
METEOROLOGICAL CONDITIONS (MON AM - SUN AM)
THE TROPICAL MOISTURE THAT IMPACTED THE REGION THIS WEEKEND HAS BEEN
CUT OFF FROM LAND AT THIS POINT WITH TPW IMAGERY SHOWING THE PLUME
HAS PULLED OFFSHORE. PRECIP AMOUNTS OVER THE LAST FEW DAYS ARE ABOUT
2-4.50" ALONG THE NORTH COAST AND INTO SHASTA, 0.75-2.50" OVER THE
CENTRAL/NORTHERN SIERRA, AND 0.10-0.75" OR SO AROUND THE BAY AREA. A
COLD FRONT REMAINS STRETCHED ACROSS SRN CA THIS MORNING AS TROUGHING
IS EXITING THE REGION. A FEW ISOLATED LINGERING SHOWERS POSSIBLE
THIS MORNING BEFORE DRY CONDITIONS ARE EXPECTED THROUGH MOST OF
FRIDAY AS HIGH PRESSURE BUILDS IN FIRST OFFSHORE AND THEN DRIFTS
INLAND THE NEXT DAY OR SO. THIS RIDGE WILL STEER ANY DISTURBANCES
OVER THE PACIFIC TO OUR NORTH THROUGHOUT THE WEEK. MODELS HAVE
ANOTHER FRONT DEVELOPING OFF A LARGE LOW OVER THE GULF OF ALASKA ON
FRIDAY AND HEADED FOR BC/PACNW. THE TAIL OF THE FRONT MAY BRUSH THE
NW CA BORDER RESULTING IN SOME SHOWERS ALONG THE NORTH COAST LATER
FRIDAY AND SATURDAY, BUT THE EXTENT OF THAT IS UNCERTAIN. ENSEMBLE
SPREAD IS ANYWHERE FROM 0" TO ABOUT 1" AT ARCATA, BUT NONE OF THE
00Z ENSEMBLE MEMBERS OUT OF THE GFS/CMC/ECMWF SHOW ANYTHING REACHING
SOUTH OF CAPE MENDOCINO FRIDAY AFTERNOON TO SATURDAY AFTERNOON.
QPF WAS MAINLY THE MORNING WPC GUIDANCE AS THERE IS NOT MUCH TO LOOK
AT FOR THE NEXT 6 DAYS. EXPECTING LESS THAN A TENTH OF AN INCH
GENERALLY FOR ANY LINGERING SHOWERS THAT MAY DEVELOP TODAY. FOR
FRIDAY/SATURDAY QPF IS 0.10-0.30" FOR THE SMITH BASIN AND CREST OF
THE SRN OR CASCADES TAPERING DOWN TO 0.10" OR LESS FOR MOST OF THE
REST OF THE NORTH COAST. FREEZING LEVELS RISING THROUGHOUT THE WEEK
WITH MOST LOCATIONS ABOVE 12 KFT BY TOMORROW MORNING. LEVELS THEN
HOVER AROUND 12.5-14.5 KFT THROUGHOUT THE WEEK.
PLEASE NOTE: THIS PRODUCT MAY NOT BE ROUTINELY UPDATED. PLEASE REFER
TO THE FOLLOWING PRODUCT ISSUED BY THE CNRFC
WWW.CNRFC.NOAA.GOV/DAILY-BRIEFING FOR A GRAPHICAL SUMMARY OF WEATHER
AND HYDROLOGIC CONDITIONS.
QPF GRAPHICS ARE AVAILABLE AT WWW.CNRFC.NOAA.GOV/QPF.PHP
AS
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