Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 615 AM PDT Wed Jul 22 2026 ...PRECIP CHANCES DIMINISH THROUGH THE PERIOD... ...BEST OPPORTUNITY FOR SHOWERS/T-STORMS TODAY ACROSS NRN/ERN NV... .METEOROLOGICAL CONDITIONS (WED AM - TUE AM)... Ample moisture continues across much of the region this morning as a glance at 22/12Z ROABs show a range of PW from 0.91-inch at KOAK to 1.75-inches at KNKX. Strong high pressure has shifted slightly to the south and east over the past 24 hours...now centered over the southern Plains states...while an area of low pressure continues to spin off the northern CA coast in the vicinity of 40N/130W. Through Wednesday...flow turns a bit more from the southwest...allowing a drier airmass to begin to filter across the area. Best opportunity for showers and thunderstorms looks to be across northern and eastern NV with a lesser likelihood for the central/southern Sierra. Through the rest of the week...the high pressure cell will rebuild over the 4-Corners region and near 6000-meters at 500-mb...while the area of low pressure off the northern CA coast ejects to the northeast...leaving drier southwest flow across much of the west coast. Look for chances of afternoon and evening showers/t-storms to drop off through the weekend into early next week. Freezing levels are currently running from 15000-feet northwest to 16500-feet east. These will fluctuate through the period in the range of 14000- to 18000-feet continuing the northwest to east gradient across the region. 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. |