Parade of East Pacific storms to affect all of California as subtropical jet strengthens

Long-awaited pattern change finally at our doorstep From Daniel Swain at the California Weather blog: “A handful of modest weather systems have brought generally light precipitation and cold temperatures to parts of California over the past week or so, mostly in the north. While these systems did little to alleviate long-term water deficits, they did preferentially add some more water […]

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California Weather Blog: A new year, a new ridge: dry and warm conditions return to California, but how does the present pattern compare to last year’s?

From the California Weather Blog: Weather conditions over the past two months have varied wildly throughout California.Extremely heavy precipitation and unusually warm conditions in early December in the northern/central coastal regions gave way to very cold and mostly dry conditions around the new year (though not dry enough to preclude some remarkable low elevation snowfall in the lower hills of […]

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California Weather Blog: Windy and cold weather on the way, with low elevation snow possible in SoCal, then a dry and cold start to the new year

From the California Weather Blog: “After an extremely wet December across much of Northern California, the latter half of the month has been quite dry.     Precipitation during the first few days of the month was so significant, however, that despite an ongoing short-term dry spell, December 2014 will still go down in the record books as among the wettest […]

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California Weather Blog: Much-needed rains return to California (and there’s more to come), but severe long-term drought continues

From Daniel Swain at the California Weather Blog: A very impressive winter storm brought widespread heavy rainfall to most of California last week. A strong and moist atmospheric river–with a corridor of enhanced moisture transport extending all the way southwest to the Hawaiian Islands–occurred in conjunction with a rapidly-deepening surface low pressure area off the far NorCal coast, bringing a […]

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Satellites, river stage graphs, rainfall maps, atmospheric rivers, and more: Internet resources for watching the storm and waterways

Here are some internet resources where you can find information on weather conditions, river flows, and reservoirs that might be useful for watching the storm and its impacts from your computer. If you have an internet resource that you think would be a useful addition to this page, please send me an email. Be safe out there! For weather and […]

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California Weather Blog: Powerful, potentially damaging storm to bring very heavy rainfall and high winds to Northern California

From Daniel Swain at the California Weather Blog: Very strong storm–perhaps strongest since 2008–will arrive in California late Wednesday The numerical weather models are now in strong agreement that a powerful Pacific winter storm will slam Northern California later this week, bringing very heavy precipitation and very strong winds. In many ways the upcoming event is a textbook major storm […]

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2014-15 Winter Season Outlook

When it comes to the upcoming winter season, there are many questions.  Will it be wet or dry?  What about El Nino? and what will it take to end the drought?  Cindy Matthews, Senior Service Hydrologist with the National Weather Service/NOAA, answered these questions in her presentation at the November Delta Stewardship Council meeting on the long range forecast for […]

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Dr. Dan Cayan: Climate Change and California’s Water: What Challenges Can We Anticipate?

Dr. Dan Cayan is the director of the Climate Change Center at Scripps and also concurrently holds a research position in the USGS Water Resources division.   At the November meeting of the Delta Stewardship Council, he gave an overview of California’s climate variability and of the current state of knowledge of the potential impacts of climate change on the state’s […]

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California Weather Blog: Active weather pattern on tap for California; high uncertainty remains regarding precipitation amounts

From the California Weather Blog: “Despite the arrival of substantial early-season rainfall across the far northern portions of the state in recent weeks, nearly all of California has experienced much drier than normal  conditions thus far this fall. In fact, some of the traditionally wetter parts of northern and central California have missed out on nearly 5-10 inches of liquid precipitation […]

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California Weather Blog: A dry start to autumn for most of California as amplified North American pattern continues; Prospects for rain murky

From the California Weather Blog: “A rather extraordinary sequence of atmospheric events has unfolded over the Pacific Ocean and across adjacent North America over the past week or so. The current pattern is strongly reminiscent of the extremely high amplitude wave pattern that dominated most of winter 2013-2014 and the latter half of 2012-2013. While the implications are a little […]

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