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Posted inRegional

Isolated to scattered thunderstorms afternoon/evening this week

Isolated to scattered shower and thunderstorm chances continue for the mountains, portions of the foothills, and northern half of the Sacramento Valley through the holiday weekend and next week. Temperatures remain near or slightly below normal. Periods of locally breezy onshore winds. Slight warming for the end of the week into next weekend possible. Discussion […]

Posted inRegional

Isolated to scattered thunderstorms into next week

Isolated to scattered thunderstorms may produce dangerous lightning, gusty winds, hail and brief heavy downpours, impacting outdoor activities and recreationists. Cool temperatures into next week. Thunderstorm chances continue for the mountains and northern Sacramento Valley. Discussion Clear to partly cloudy skies cover interior NorCal early this morning as debris cloudiness lingers from Thursday evening’s deep […]

Posted inRegional

Above normal temperatures with areas of moderate heat risk this week

Above normal temperatures will bring areas of moderate heat risk to the Valley this week. Mountain shower and thunderstorm chances may return over the weekend. Rivers and creeks will continue to flow high, cold, and fast as a result of mountain snowmelt. Discussion Still a few thunderstorms ongoing across far northeast California early this morning, […]

Posted inRegional

Significant warming trend will bring widespread moderate heat risk

Moderate Risk for heat-related illnesses for pets, livestock, and those who are sensitive to heat, especially those without effective cooling and/or adequate hydration. Dry conditions expected the rest of this week with hot weather by this weekend. Isolated mountain thunderstorms are possible Sunday. Discussion A few high clouds are cresting the building ridge over NorCal, […]

Posted inRegional

Isolated thunderstorms today, significant warming late week

Cool, unsettled weather continues today. Showers and isolated afternoon thunderstorm chances mainly over the mountains. Dry conditions expected the rest of this week with well above normal temperatures this weekend. Discussion Latest GOES-West infrared satellite imagery illustrates some mid to high level clouds passing over portions of interior northern California early this Tuesday morning. Cool […]

Posted inRegional

Showers through Tuesday, dry and significant warming follows

Cool, unsettled weather continues with showers, high elevation snow showers and isolated afternoon thunderstorm chances through Tuesday. Dry and warming conditions expected later this week and into the weekend. Discussion Current radar shows some light showers up in Shasta County early this morning, with a more impressive band of precipitation just to the west over […]

Posted inRegional

Showers, high elevation snow and thunderstorms into early next week

Cool unsettled weather continues through the weekend with shower and thunderstorm chances. The higher elevations will see late-season snow showers with some minor accumulations. Discussion Upper low has progressed into the Great Basin as next upstream short wave poised to drop into the longwave trough along West Coast. Isolated showers this morning expected to become […]

Posted inRegional

Unsettled weather pattern brings showers, high elevation snow

Cool and unsettled weather is expected through much of the week with shower and thunderstorms chances. The higher elevations will see some late-season accumulating snow. Discussion Satellite imagery shows the trough centered offshore continuing to drop south off the coast. The upper level front and associated band of mid and high clouds has pushed through […]

Posted inRegional

Warm through the weekend, cooler and unsettled next week

Dry weather with much above normal temperatures continue through Saturday. A weather system will impact the region early next week, decreasing temperatures and bringing precipitation to the region, with best chances in the Sierra. Discussion Strong upper level ridge will continue to hold over northern California through Saturday. Heights will remain over 580 dam through […]

Posted inRegional

Abnormally warm temperatures through Saturday, cooler, unsettled weather pattern next week

Dry weather and above normal temperatures forecast through the weekend. Many Valley locations will reach the low to mid 90s the next several days. A weather system will impact the region early next week, decreasing temperatures and potentially bringing light precipitation to the Sierra. Discussion Strong upper level ridge will continue to build over northern […]

Posted inRegional

Mountain snow, isolated thunderstorms & cool temperatures early this week

Cool and unsettled weather with showers, mountain snow, breezy winds, and isolated thunderstorm chances for the first part of this week followed by dry and seasonably warm temperatures late-week into the weekend. Discussion Current GOES-West infrared satellite imagery shows the passage of some mid to high level clouds over portions of interior northern California early […]

Posted inRegional

NWS Winter to Mid-Spring 2022-23 Climate and Drought Summary & Outlook

WATER YEAR PRECIPITATION (October – April 10th) An active storm pattern during the winter and mid-spring months continued with above-normal precipitation across interior NorCal. Water Year precipitation totals ranged from 125 to 190% of normal precipitation through mid-April. STRONG ATMOSPHERIC RIVER STORMS Several atmospheric river storms impacted NorCal from December 26, 2022 – January 17, […]

Posted inRegional

Showers with mountain snow possible early next week

Temperatures will gradually warm through the weekend. Another weak weather system brushes the region early next week bringing cooler temperatures, increased clouds and a chance of showers. Discussion Other than some high clouds sliding south across NorCal, skies are clear early this morning. Surface gradient has slackened and winds are lighter. Temperatures are mainly cooler […]

Posted inRegional

Gusty northerly winds Wednesday – Thursday, warming trend to follow

Cooler temperatures through Thursday as a weak system brushes by to the north, then warming into the weekend. Breezy north winds possible over the Sacramento Valley Wednesday and Thursday. Discussion An upper trough moving into the Pacific Northwest this morning will be followed by a closed low that will reach the Washington and Oregon border […]

Posted inRegional

Light rain/mountain snow tonight – Friday, warming trend this weekend

Weak weather system brings precipitation chances this evening and into Friday. Warming trend expected this weekend with above normal temperatures by Sunday. Light precipitation possible for far northern California early next week. Discussion GOES-West nighttime microphysics imagery reveals scattered to broken mid/high clouds traversing overheard this early Thursday morning. These clouds are streaming ahead of […]

Posted inRegional

Quick-hitting system brings mountain snow this weekend into early next week, cold temperatures follow

Chance of showers over the weekend into next week, mainly over the mountains and Northern Sacramento Valley. Below normal high temperatures through next Thursday. Discussion Longwave troughing off the West Coast with embedded channel vort maxes will move across northern portions of CA today as associated cold front drops into NorCal. This will bring a […]

Posted inRegional

System to bring mountain snow and light rain showers this weekend into early next week

Drier weather expected Friday. Mainly mountain precipitation chances return over the weekend and persist into next week with temperatures remaining below average. Snow levels 3000-6000 feet Sunday, lowering to 1500-2500 feet Monday. Discussion The upper low has shifted over central California, with radar indication some lingering showers over the the northern Sierra south of US […]

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