Meteorologist Anna Schneider of the National Weather Service said the upcoming storms forecast to hit through this weekend could be the last big rainmaker events of the season in the Bay Area. ©2020 CBS Broadcasting Inc. All Rights Reserved. Atmospheric river: These supercharged storm systems are known for delivering massive amounts of snow and rainfall in a matter of days on the West Coast of the United States. On average, December is the wettest month. Mission Bookmobile. The amount that falls is dependent upon the strength of the storm and its moisture content. Prop. More about our weather records San Francisco Weather History for the Previous 24 Hours Show weather for: Previous 24 hours October 17, 2020 October 16, 2020 October 15, 2020 October 14, 2020 October 13, 2020 October 12, 2020 October 11, 2020 October 10, 2020 October 9, 2020 October 8, 2020 October 7, 2020 October 6, 2020 October 5, 2020 October 4, 2020 October 3, 2020 October 2, 2020 How... Another San Francisco Walgreens is closing. San Francisco has dry periods in May, June, July, August and September. "Planes passing through the cloud layer can bring these ice crystals. Here comes another inch. All Rights Reserved. These records are prepared, owned, used, or retained by any state or local agency regardless of physical form or characteristics. But don’t expect the relief to be in place for long. The record precipitation has allowed California to pull out of a five-year drought. The new No. The eight-station Northern Sierra Nevada index, a mix of rain gauges near major Northern California reservoirs, currently stands at 83.48 inches of rain, about 5 inches shy of the all-time record set in 1982-3. I think the best ones are the Sierra multi-station indexes. The Bay Area is seeing unseasonably high rainfall this May. Post was not sent - check your email addresses! Rainfall - 2003 -present: Normal Daily Rainfall: Sorted by Amount: Top 20 Wettest Months: Records & Normals: Normal Monthly Raifall: Sorted by Days of Rain : Probabilit y of Rain: Seasonal Rainfall 1849-2009 : Rainfall Return Periods : Calendar Year : Top 20 Wettest Days : Running Normal Rainfall Wet & Dry Spells : Consecutive Days of Rain SF has already surpassed typical rainfall for May. 6 Hour Periods (PDT) Daily (PDT) 1 HR. I got a Uniqlo mask. Between October 2016 and March 2017, California averaged 30.75 inches of precipitation, the second-highest average since such records began being kept in 1895. Driving California’s precipitation totals this year was a parade of “Pineapple Express” storms, a type of “atmospheric river” that gets its name from the plume of moisture coming from Hawaii into California. Mark Gomez has worked for the Mercury News since 1992, including the past ten years as a reporter on the breaking news/public safety team. Several locations broke or tied daily record high temperatures today. Tue 2 - 6. Tue 2 - 6. In California, the La Niña weather pattern is known for bringing above-average precipitation to the far northern reaches of the state near the Oregon border and delivering below-average precipitation to the central part of Northern California and even drier conditions into Southern California. GET BREAKING NEWS IN YOUR BROWSER. It's because a pocket of dry air in the upper atmosphere evaporates the water droplets before they can hit the ground. California storms: Wettest Oct-Feb in 122 years Fallstreak cloud: These stunning formations are also sometimes called hole punch clouds because it literally looks as if something punched the sky with cloud puffs dissipating from a large elliptical gap. San Francisco sees on average .71 inch of rain in May and this year the monthly total as of May 16 is .78. Pedestrians cover up from the rain on Wednesday, May 15, 2019 in San Francisco, Calif. You can email her at You might want to considering bringing your Saturday backyard barbecue inside. The breezes will also clear out any linger smoke that had drifted into the Bay Area skies from the August Complex fire burning in three national forest north of San Francisco. Areas away from the coast on the other hand will remain mild to hot as highs soar into the 90s once again. El Niño: The inverse of La Niña, El Niño, is a warming of the equatorial waters in the center and eastern Pacific Ocean. All Access Digital offer for just 99 cents! But Jan Null, a meteorologist with Golden Gate Weather Services, places little value in the statewide rankings because they take into account “a lot of areas that do not contribute to our water supply.”. On average, July is the driest month. The next storm will arrive in the North Bay on Saturday morning, initially bringing light showers and gradually intensifying and marching southward into the central Bay Area. 5 AM - 5 AM. Address. 'Mass availability' of vaccine unlikely this year,... Video shows SF business owner flashing weapon to... SF broke a 128-year-old temperature record last week. She has been with SFGATE for 12 years. Polls started to tighten at this time in 2016. Virga: This weather phenomenon occurs when the clouds are thick and dark but don't drop rain to the ground. 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Mon closed. SAN FRANCISCO (CBS SF) — Cooling sea breezes brought welcome relief to San Francisco Bay Area residents Saturday, ending three days of record and the threat of red flag warning conditions. San Francisco Bay Area Observed Precipitation Map. This season was the wettest through the end of February, fueled largely by a conveyor belt of “Pineapple Express” storms that inundated much of the state with rain and snow. Tourists take pictures in the rain seen through a window at Twin Peaks on Wednesday, May 15, 2019 in San Francisco, Calif. A man fumbles with his umbrella as he tries to cover from the rain at Twin Peaks on Wednesday, May 15, 2019 in San Francisco, Calif. A man uses a poncho to cover from the rain at Twin Peaks on Wednesday, May 15, 2019 in San Francisco, Calif. Pedestrians cover from the rain on Wednesday, May 15, 2019 in San Francisco, Calif. Sun closed. San Francisco sees on average.71 inch of rain in May and this year the monthly total as of May 16 is.78. The storms that year resulted in widespread flooding and mudslides to coastal mountain ranges, causing 36 deaths, according to the Western Regional Climate Center. Mission Bookmobile. 0 F San Francisco International Airport Station | Report. The ridge blocks storms from reaching the West Coast, resulting in abnormally warm and dry conditions in California. Fri closed. Report Station. 5 PM - 11 PM. After relatively modest rainfall in March, this season now ranks as the second wettest in 122 years of record-keeping, according to data released Thursday by federal scientists. Forecasters predict rainfall totals for Saturday morning into Sunday night will be .5 to 1 inch in the San Francisco area, .75 to 1.25 inches in the North Bay valleys, 1.5 to 2.5 inches in the North Bay hills and .25 to .5 inch in the South Bay. “You won’t see significant differences. Dry conditions will prevail Friday as weak high-pressure builds over the region. Oakland got up to 94, breaking the mark of 90 in 1974. Next week looks to be generally dry with storms staying in the Sierra Nevada, but details are still unclear. "It's hard to tell," adds NWS forecaster Anna Schneider. Among the new record highs were a 92 reading in San Francisco, a 94 at San Francisco International, a 92 at Half Moon Bay, 95 in San Jose and a 99 in Salinas. 5 AM - 11 AM. Thank you for reporting this station. "These 'supercooled' water droplets need a 'reason' to freeze, which usually comes in the form of ice crystals," NWS explains. Our heat wave will roll into a 3rd day for the Labor Day holiday. “The weaker offshore flow will allow for a return of the sea breeze near the coast,” the weather service said. The city's rainfall record for May is 4 inches in 1925. The last significantly wet May was in 2015, when a little over an inch was measured. The average amount of annual precipitation is: 23.62 in (600.0 mm), While today was the hottest day over the 3 day weekend, tomorrow is still dangerously hot. He is a South Bay native and graduate of San Jose State University. Ridiculously resilient ridge: Daniel Swain, a climate scientist at UCLA, coined the term “ridiculously resilient ridge,” sometimes shortened to "RRR," to describe the phenomenon when a ridge of high-pressure persists for an extended period of time over the father northeastern Pacific Ocean. Station Data. "It might be more scattered by Sunday morning but there could still be periods of heavier rain.". The statewide precipitation values given by NCEI “represent area weighted average of values observed at weather stations across the state,” according to Nina Oakley, a California Climate Specialist with the Western Regional Climate Center, part of NOAA. 22 degree halo: These rings of light occur around the sun or moon when light is refracted by ice crystals associated with high-level clouds known as cirrostratus. Last year, at this time, the city hadn't seen a single drop of rain. San Francisco, CA Weather History star_ratehome. A lot of rain (rainy season) falls in the months: January, February and December. San Francisco Records was co-founded by music promoter Bill Graham (2) and David Rubinson in 1969. Forecasters said skies would remain clear but temperatures would be 10 degrees or more cooler. After a moisture-rich atmospheric river soaked the Bay Area for two days straight this week, another storm is set to arrive Saturday, delivering a second dose of rain, according to the National Weather Service. For requests sent to the California Department of Public Health-Vital Records (CDPH-VR), victims should also make the notation “Wildfire” on the front of the mailing envelope, for faster processing. More widespread cooling is on track for Sunday and Monday.”. As of April 4, 2017, 91 percent of the state was no longer in drought condition, according to federal scientists. Amy Graff is the news editor for SFGATE. On Sunday, when San Francisco hosts the annual Bay to Breakers race, scattered showers are in the forecast. In March 2016, just 5 percent of California was classified as free from drought. The National Weather Service explains fallstreaks occur when the water temperature in a cloud is below freezing, but the tiny water droplets forming the cloud have yet to freeze. Afternoon highs could reach the 60s in areas where the clouds break and the sun makes an appearance. Sun closed.

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