935
AGUS76 KRSA 031445
HMDRSA
HYDROMETEOROLOGICAL DISCUSSION
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
645 AM PST WED DEC 3 2025
...DRY CONDITIONS FOR MOST OF THE REGION THROUGH THE PERIOD AS
STRONG HIGH PRESSURE SITS OVER THE EASTERN PACIFIC...
...LIGHT SHOWERS ALONG THE NRN BORDER FRI-SUN AS A COUPLE SYSTEMS
SLIDE DOWN THE RIDGE INTO THE PACNW...
METEOROLOGICAL CONDITIONS (WED AM - TUE AM)
AN INSIDE SLIDER IS IN THE PROCESS OF EXITING THE REGION. THIS MAY
GENERATE A FEW LINGERING SHOWERS OVER EASTERN NV THE REST OF THE
MORNING. A STRONG UPPER RIDGE REMAINS ENTRENCHED ACROSS THE EASTERN
PACIFIC STRETCHING THE LENGTH OF THE ENTIRE WESTERN US AND CANADA.
THE RIDGE IS EXPECTED TO KEEP MOST OF THE REGION DRY THROUGH THE
FORECAST PERIOD. MODELS STILL HAVE A COUPLE OF DISTURBANCES SLIDING
DOWN THE EASTERN SIDE OF THE RIDGE INTO THE PACNW STARTING FRIDAY
BRINGING SOME LIGHT SHOWERS ALONG THE NORTHERN REGIONAL BORDER
THROUGH THE COMING WEEKEND. BEYOND THAT, DET MODELS AND MOST
ENSEMBLE MEMBERS HAVE THE RIDGE STICKING AROUND FOR A WHILE
FLATTENING A BIT OVER THE WEEKEND AS A LARGER UPPER LOW TRAVERSES
THE GULF OF ALASKA. ABOUT 20% OF MEMBERS SHOW SOME MORE NOTABLE
FLATTENING OF THE RIDGE IN A WEEK OR SO WHILE ANOTHER 30% HAVE A
TROUGH DISPLACING IT A FEW DAYS LATER. AS LONG AS THE RIDGE REMAINS
OFFSHORE, THE STORM DOOR WILL BE CLOSED FOR MOST OF CA.
MORNING FORECAST WAS A BLEND OF THE LATEST NBM AND WPC GUIDANCE.
AMOUNTS HAVE GONE BACK DOWN A 0.10-0.20" OVER THE 6 DAY PERIOD
COMPARED TO YESTERDAY. CURRENT FORECAST HAS 0.25-0.75" OVER NE NV,
0.50-1" OVER THE CREST OF THE CASCADES, 0.10-0.50" ALONG THE NORTH
COAST TAPERING OFF QUICKLY INTO NOTHING BY SHASTA.
LOWER FREEZING LEVELS OVER NV AND THE EAST SIDE OF THE SIERRA TODAY
AS THAT SLIDER PASSES DOWN TO 4.5-6 KFT FOR NV AND 5-7.5 KFT FOR THE
EAST SIERRA. HIGHER FREEZING LEVELS WILL FILL IN FROM WEST TO EAST
THE REST OF THE WEEK WITH CA BACK UP TO 8.5-12.5 KFT BY FRIDAY. THE
SYSTEMS INTO THE PACNW OVER THE WEEKEND WILL LOWER LEVELS A BIT
ALONG THE NORTHERN BORDER BUT ONLY DOWN TO ABOUT 6.5-8.5 KFT.
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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