Hydrometeorological Discussion National Weather Service / California Nevada RFC / Sacramento CA 830 AM PDT Thu Mar 19 2026 ...HOT AND DRY WEATHER WITH RECORD SETTING TEMPERATURES INTO SATURDAY... ...POTENTIAL FOR LIGHT SHOWER ACTIVITY ACROSS THE NORTH EARLY NEXT WEEK... .METEOROLOGICAL CONDITIONS (THU AM - WED AM)... An anomalous ridge continues to sit over the western US with 500-hPa height anomalies of 6+ sigma over the Four Corners region. The placement of the ridge is directing any storm activity into the PNW while driving well above normal temperatures across the forecast area with numerous daily and March records being set. The heat looks to peak either today or tomorrow with the 500-hPa height anomalies extending northward into tomorrow. The ridge begins to flatten out on Saturday which should provide a slight reprieve to the heat and allow for the opportunity for unsettled weather to make its way into the northern portions of the forecast region early next week. GFS is currently more bullish than the EC, placing over a half an inch in the Smith Basin on Tuesday while the EC is around a couple tenths. The GFS also has accumulating precipitation as far south as the Russian Basin and as far east as the northeast Plateau in California. Morning forecasts followed guidance from the NBM and WPC, which falls more in line with the EC. After the brief chance for precipitation, guidance suggest the ridge will rebuild,though not as strong as the current ridge. This will result in a return to warm and dry weather. 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. |