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johnantczak.bsky.social
@johnantczak.bsky.social
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Reposted
cw3escripps.bsky.social
CW3E AR Update: An active weather pattern will continue this week, with multiple #AtmosphericRivers forecast to bring heavy precipitation to portions of the Pacific Northwest and northern California.

See our latest AR Outlook for more details: cw3e.ucsd.edu/cw3e-ar-upda....
November 3, 2025 at 10:02 PM
Reposted
lax.nws-bot.us
🚨 Fire Weather Watch issued August 17 at 1:19PM PDT until August 23 at 9:00PM PDT by NWS Los Angeles/Oxnard CA 🚨
Additional Details Here.
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH SATURDAY EVENING FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING EXPLOSIVE FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE MOUNTAINS AND FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES... .The most significant heatwave of the summer season, so far, is on the way middle to latter parts of this week and into next weekend, especially Wednesday through Saturday. Expect temperatures to soar well over 100 degrees over interior areas, locally reaching near 110 degrees over some mountain valley and desert locations. The intense surface heating will bring strong vertical mixing to depths extending over 15-17 thousand feet -- highest Thursday and Friday. Resultant unseasonably strong instability will create a fire environment capable of producing explosive fire behavior through significant vertical plume growth, as minimum relative humidity ranges from 8 to 20 percent in the dry air mass. Overnight relative humidity recovery will be poor to moderate, while the shallow marine layer generally remains displaced closer to the beaches. The Fire Weather Watch area covers portions of the mountains and foothills of Los Angeles and Ventura Counties, which have been a climatologically notorious area for large plume-dominated fires in similar weather patterns to what is coming later this week. While background surface winds are not expected to be strong, or even close to reaching nominal Red Flag Warning criteria, they will be locally breezy in the afternoon and evening over the western Antelope Valley Foothills and vicinity and in other wind-favored areas such as through passes and canyons -- southwest at 10-20 mph gusting to 25-30 mph. These winds will exacerbate the spread of any plume-dominated fires, and add to the potentially dangerous fire-weather environment. Moreover, the western edge of a southwest-states monsoonal moisture influx will overlie Los Angeles and Ventura Counties, which will contribute to the development of atmospheric buoyancy by Friday and Saturday without significantly moistening the air mass -- i.e., displaced away from the core of the moisture source. While lightning-induced fire ignitions are a distinctive possibility on the peripheries of rain cores, the increase in buoyancy will further aid in vertical plume growth accompanied by potential pyrocumulus development and related explosive fire behavior. And with significant fuel loading of exceptionally dry fuels, the fire environment in the mountains and foothills of Los Angeles and Ventura Counties will become especially volatile for Wednesday through Saturday, warranting the issuance of a Fire Weather Watch upon collaboration with local area National Weather Service Core Partners. Analogs to the forthcoming, highly volatile fire-weather environment in Los Angeles County include both the Station Fire, the Bobcat Fire, and the Bridge Fire that burned significant portions of the Angeles National Forest in 2009, 2020, and 2024, respectively. In each case, winds were generally below Red Flag Warning criteria, yet the extreme heat combined with buoyancy greatly offset the sub-marginal wind to create explosive fire behavior and the growth of large fires. Interests in the Fire Weather Watch area should be prepared for similar activity if fires were to start. Also, be aware of passing outflow boundaries that could bring sudden wind-shifts and increased fire-spread rates, even from distant thunderstorms. The National Weather Service in Los Angeles/Oxnard has issued a Fire Weather Watch for an unseasonably hot and unstable air mass capable of producing explosive fire behavior from vertical plume growth, low relative humidity, and locally breezy winds for portions of the mountains and foothills of Los Angeles and Ventura Counties, which is in effect from Wednesday morning through Saturday evening. * TEMPERATURES...Unseasonably hot high temperatures, generally 95-110 degrees and highest Thursday through Saturday, producing unseasonably unstable conditions. * RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent, lowest Wednesday and Thursday. * THUNDERSTORMS...Isolated thunderstorms will be possible Thursday through Saturday, and accompanying lightning strikes will be capable of starting new fires on the peripheries of rain cores. * WINDS...Southwest at 10-20 mph gusting to 20-25 mph over the western Antelope Valley Foothills and vicinity and in other wind-favored areas such as through passes and canyons. Lighter winds elsewhere. Passing outflow boundaries could bring sudden wind-shifts and increased fire-spread rates, even from distant thunderstorms. * IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which could threaten life and property. Be aware of sudden re-direction of fires in response to passing outflow boundaries. * ADDITIONAL DETAILS...Fire-weather headlines may eventually need to be extended into Sunday and into portions of interior Santa Barbara and San Luis Obispo Counties.
August 17, 2025 at 8:30 PM
johnantczak.bsky.social
x.com/nasajpl/stat...
NASA JPL on X: "John Casani was a true deep space pioneer 💫 After joining JPL in 1956, John worked as an electronics engineer on some of the nation's earliest spacecraft. Later, he served as project manager for Voyager, Galileo, and Cassini. More on his legacy: https://t.co/XqzOsIuCuZ" / X
John Casani was a true deep space pioneer 💫 After joining JPL in 1956, John worked as an electronics engineer on some of the nation's earliest spacecraft. Later, he served as project manager for Voyager, Galileo, and Cassini. More on his legacy: https://t.co/XqzOsIuCuZ
x.com
June 25, 2025 at 7:37 PM
johnantczak.bsky.social
Pasadena, Calif. #NoKings
April 19, 2025 at 11:01 PM
Reposted
science.org
Breaking news: President Donald Trump’s administration is seeking to end nearly all of the climate research conducted by the U.S. National Oceanic and Atmospheric Agency, one of the country’s premier climate science agencies, according to an internal budget document seen by Science. scim.ag/4ctpT4Z
Trump seeks to end climate research at premier U.S. climate agency
White House aims to end NOAA’s research office; NASA also targeted
scim.ag
April 11, 2025 at 3:27 PM
Reposted
weatherwest.bsky.social
New Weather West post: As wet & cool late-winter pattern departs, growing signs of unusually warm & dry spring across CA & broader West. #CAwater #CAwx #CAfire weatherwest.com/arch...
As wet & cool late-winter pattern departs, growing signs of unusually warm & dry spring across CA & broader West - Weather West
It's official: California's north-south precipitation dipole persisted the entire wet season Well, as the dry season approaches, it's now pretty clear that the much-discussed north-south "precipitation dipole" across California did indeed manage to persist for the entire rainy season (something that had been predicted by seasonal outlooks). It did soften, somewhat, from its very intense
weatherwest.com
April 7, 2025 at 11:19 PM
Reposted
loristreifler.bsky.social
Glad to hear of this ruling that the AP should never have had to fight to win. #PressFreedom
nytimes.com The New York Times @nytimes.com · Apr 8
A federal judge in Washington rejected the White House’s effort to keep The Associated Press from routinely covering President Trump, finding that it had faced political retaliation over its editorial decisions.
Judge Sides With The Associated Press In Fight Over Access to Trump
A federal judge ordered the White House to restore the outlet’s access to certain White House events and agreed that it had been singled out over its editorial decisions.
www.nytimes.com
April 8, 2025 at 9:46 PM
Reposted
altfaa.altgov.info
If you're losing hope just look at all the people who are continuing to fight. Take a break, take care of yourself and yours, then step back up when you're ready. Tap in.
March 1, 2025 at 11:48 AM
Reposted
rissarwx.bsky.social
All probationary federal employees at NOAA’s EMC that’s responsible for keeping all US weather model systems running have been fired with 1 hours notice. And that includes me and colleagues. We will not go quietly because we care about the NOAA mission to protect the public.
February 27, 2025 at 9:18 PM