Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
234 FXUS66 KSTO 060930 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 230 AM PDT Mon May 6 2024 .SYNOPSIS... Drier, warmer conditions return this week with gusty north to east winds mid-week. Valley highs will approach and possibly exceed the 90 deg mark by late week. && .DISCUSSION... The strong upper trough that brought winter-like weather on Saturday has progressed eastward and will provide the trigger for a severe weather outbreak forecast later today across portions of the Plains. Northwest flow on the backside of the trough will continue today with dry and milder weather expected, though another short-wave sliding southeastward may bring a few showers to the mountains of Shasta County later today. By Tuesday this short-wave will drop into the Great Basin resulting in a period of offshore/northerly surface winds for the region as it gradually carves back into NorCal. National Blend of Models advertises a 60 to 90 percent probability of gusts exceeding 35-45 mph across the north wind-prone areas of the western Sacramento Valley and northern Sierra foothills around Butte County. While the northerly flow will occur during the Tuesday-Thursday timeframe, current thinking is that the strongest winds will occur on Wednesday. In addition to the gusty winds, day-to-day warming will commence with Valley highs returning the upper 70s/lower 80s by Wednesday, and into the mid/upper 80s on Thursday. && .EXTENDED DISCUSSION (Friday THROUGH Monday)... EPAC upper ridge remains main synoptic feature through the extended forecast period. As a result, dry weather expected with above normal temperatures. High temperatures in the Central Valley forecast in the upper 80s to lower 90s, about 10 to 15 degrees above normal, with 60s to lower 80s for the mountains and foothills. Locally gusty northerly to easterly wind lingers into Friday morning. && .AVIATION... VFR conditions over interior NorCal next 24 hrs. Sfc wind mainly at below 12 kts except vcnty of Delta SWly sfc wind up to 20 kts possible aft 00z Tue. && .STO WATCHES/WARNINGS/ADVISORIES...None. && $$