Much warmer and drier weather returns next week, though, with temperatures well into the 80s across inland areas likely. #CAwx [4/4]

Lower atmospheric temps, more relevant to those of us who live at surface of Earth (erm, most of us!), will also be quite cool relative to typical May values, but likely not record-breaking. But this does mean it'll be cold/wet weekend, with late season Sierra snow! #CAwx [3/4]

500mb heights (a measure of the vertical elevation of the 'half mass' pressure surface, which is essentially an aggregate indicator of the overall temperature of the lower half of air column) will be near or at record low levels for early May in far NorCal. [2/4] #CAwx

Impressive late-season low pressure system will bring short, sharp hit of cold rain (and mountain snow above ~4k ft) this wknd. Nearly everywhere in NorCal should see good soaking, w/lighter showers into SoCal. This will be quite a cold system by May standards... [1/4] #CAwx

‼ Update ‼

The Winter Weather Advisory for elevations above 5000' along the Sierra has been upgraded to a Winter Storm Warning with moderate to occasionally heavy snow expected. The Winter Storm Warning will still be in effect from 11 am Saturday through 8 am Sunday.

#CAwx

BTW--is anyone aware of an automated tool that exists at this point to copy posts from one social media platform to another? Right now I'm still doing it manually which is very time consuming and means that in practice I'm not sharing the same content on all platforms.

Confidence continues to increase in a quick moving, late season storm impacting the region as we move into the weekend. Here's a quick look at forecast precipitation and snowfall as of this morning:

#CAwx

A lot of folks have been fixated on changes to sulfur in marine fuels of late, but the much bigger climate story here is the nearly 50% decline in overall global emissions of planet-cooling sulfur dioxide since 1980 – much of which has happened in the last 15 years:

Record-shattering heat in East and South Asia has broken thousands of records, setting all-time and monthly milestones from Japan to Thailand to India. axios.com/2024/05/02/eas…

Topic of my live Office Hour today (3pm PT): Brief discussion of late-season cool/wet storm system this wknd in NorCal. Then, further thoughts on what El Niño->La Niña transition amid record warmth means for N. American wildfire & hurricane risk... #CAwx youtube.com/watch?v=_ig1e0…

Topic of my live Office Hour today (3pm PT): Brief discussion of late-season cool/wet storm system this wknd in NorCal. Then, further thoughts on what El Niño->La Niña transition amid record warmth means for N. American wildfire & hurricane risk... #CAwx youtube.com/watch?v=_ig1e0…

Infrared images from 気象庁 #Himawari9 revealed impressive cloud-top gravity waves associated with an eruption of #Ruang in Indonesia - coldest cloud-top infrared brightness temperatures reached -90ºC (yellow pixels) immediately after eruption onset: cimss.ssec.wisc.edu/satellite-blog…

State of the climate: 2024 off to a record-warm start | Zeke Hausfather

Read here ➡️ buff.ly/3JBrxnC

Residents in the beautiful, but extreme, Santa Cruz Mountains have lived through historic fires, climate-change charged storms & weeks-long power outages.

Now, insurers are dropping out of the area & pushing people to the edge.

My latest: shorturl.at/jlnx7 San Francisco Chronicle

Live YouTube office hours tomorrow @ 10am PT! Topic: my thoughts on whether/why Summer 2024 could be hottest on record in Northern Hemisphere (yes, again) and early thoughts regarding Fire Season 2024 in North America. #CAwx #CAfire #climate youtube.com/live/ALPPC3zAb…