Hydrometeorological Discussion National Weather Service / California Nevada RFC / Sacramento CA 620 AM PDT Mon May 18 2026 ...DRY WITH GENERAL WARMING THROUGH THE WEEK... .METEOROLOGICAL CONDITIONS (MON AM - SUN AM)... Latest setup shows troffing over the interior extending from the northern Rockies back southwest over the Great Basin...while an upr ridge off the west coast stretches up into BC. This continues the dry northerly flow across the region. Through the middle of the week...this overall pattern weakens a bit...but continues to show the troffing over the interior of the western US with an upr ridge off the west coast pushing into extreme western Canada. Although weaker...flow will still remain northerly across the region. Finally into the upcoming weekend...the flow will flatten a bit with the potential for the next disturbance to move over BC and the Pacific Northwest a week from now. Overall...dry conditions with temperatures warming through the period from currently near or below average for this time of year to approx plus 5- to plus 15-degF over seasonal normals by the end of this week into the weekend...except for the immediate coast where the marine layer will influence conditions. 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. |