Tomorrow seems like a good day to talk about the weather...so let's do it. I'll host a virtual office hour to discuss recent beneficial September showers in northern CA, the unfolding extreme North Pacific marine heatwave, & autumn to come. #CAwx #CAfire
Weather & climate office hour 9/11/2025: Sep showers, extreme marine heat wave, & seasonal outlook - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
www.youtube.com
September 11, 2025 at 3:25 PM
We now have two major, wind-driven SoCal fires: #PalisadesFire (burning all day in/near Pacific Palisades) and now #CloseFire (in/near Eaton Canyon near Altadena/Pasadena). Newer Close Fire is also in a very bad spot w/increasingly extreme winds. #CAwx #CAfire
January 8, 2025 at 3:15 AM
Serious situation already w/#TemescalFire, which started above #PacificPalisades is now moving through populated wildland-urban interface. This is an extremely fast-moving wind-driven fire, with long-range spotting ongoing. Watch Duty link: #CAwx #CAfire app.watchduty.org/i/...
January 7, 2025 at 8:00 PM
I'll have my second pop-up YouTube livestream of the day at 4pm PT to discuss the now significant and expanding wildfire outbreak in Northern California due to dry lightning. I'll have a live weather radar, satellite, and fire camera tour. #CAwx #CAfire
Pop-up livestream #2 9/2/25: Widespread lightning and wildfire outbreak in Northern California - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
www.youtube.com
September 2, 2025 at 10:46 PM
Most of Chinese Camp has burned to the ground, according to Chronicle photojournalist @stephenlamphoto.bsky.social. Some residents of the historic Gold Rush town stayed to fight the blaze, despite evacuation orders.
#CAwx #CAfire
www.sfchronicle.com/california-w...
#CAwx #CAfire
www.sfchronicle.com/california-w...
September 3, 2025 at 4:16 AM
Most of Chinese Camp has burned to the ground, according to Chronicle photojournalist @stephenlamphoto.bsky.social. Some residents of the historic Gold Rush town stayed to fight the blaze, despite evacuation orders.
#CAwx #CAfire
www.sfchronicle.com/california-w...
#CAwx #CAfire
www.sfchronicle.com/california-w...
January 11, 2025 at 5:28 AM
Crazy heat signature and plume dynamics from the #GarnetFire today, pushing thick smoke and hazardous air quality toward Mammoth and Bishop. #CAwx #CAfire
September 8, 2025 at 4:53 AM
Crazy heat signature and plume dynamics from the #GarnetFire today, pushing thick smoke and hazardous air quality toward Mammoth and Bishop. #CAwx #CAfire
My thoughts on critical importance of NOAA National Weather Service & other partners in CA weather, water, & wildfire worlds--& why we simply cannot afford to lose even a portion of lifesaving & economy-boosting services it provides. #CAwater #CAfire #CAwx
www.ppic.org/blog/ho...
www.ppic.org/blog/ho...
April 29, 2025 at 5:40 PM
My thoughts on critical importance of NOAA National Weather Service & other partners in CA weather, water, & wildfire worlds--& why we simply cannot afford to lose even a portion of lifesaving & economy-boosting services it provides. #CAwater #CAfire #CAwx
www.ppic.org/blog/ho...
www.ppic.org/blog/ho...
As always, this session was recorded live and is now available for viewing at the link below! #CAwx #CAfire #CAwater
I'll have a YouTube live virtual office hour on Fri, May 23, @ 1pm PT. The topic: a potentially significant late May/early June heatwave in CA, and also summer to come for CA, the U.S. West, & across broader Northern Hemisphere. #CAwx #CAwater #CAfre www.youtube.com/live...
Weather & climate office hour 05/23/2025: Notable early June heatwave for West, plus summer thoughts - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
www.youtube.com
May 24, 2025 at 8:49 PM
New #HughesFire now spreading rapidly to W/SW toward I-5 corridors near Castaic, with expanding evacuation amid red flag condition continuing. #CAwx #CAfire
January 22, 2025 at 7:32 PM
New #HughesFire now spreading rapidly to W/SW toward I-5 corridors near Castaic, with expanding evacuation amid red flag condition continuing. #CAwx #CAfire
Monsoonal surge is now in full swing across California amid the ongoing heatwave. Widespread elevated convection across SoCal this AM, including offshore/coast. Cloud bases are high (~10k ft), so dry lightning and gusty winds are mixed in with brief downpours. [1/2] #CAwx #CAfire
August 23, 2025 at 5:37 PM
In case you missed this, the recording is available (as with all my live sessions!) at the same link below. #CAwater #CAwx #CAfire
I'll have an "ask me anything" (AMA)-style livestream this Wed, Apr 2nd, at 2pm Pacific Time! Join me then to ask whatever is on your mind in weather, climate, or wildfire realm. (I will also briefly discuss recent & upcoming CA weather.) #CAwater #CAWx youtube.com/live/edG...
Weather and climate office hour 04/02/2025: Ask me anything about weather, climate, and wildfire! - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
youtube.com
April 3, 2025 at 8:29 PM
I'll be giving a talk at the California Fire Science Consortium (virtual) seminar at 10am Pacific Time today! See you there. #CAwx #CAfire #CAwater
Join us tomorrow, February 25th at 10am PT for the continuation of the California Fire Science Seminar Series. @weatherwest.bsky.social will present Shifts in seasonality and increases in hydroclimate whiplash are increasing California wildfire risk. Register here: https://buff.ly/40HelHi
February 25, 2025 at 4:38 PM
Is there a link between #ClimateChange & increasing risk/severity of #wildfire in California--including the still-unfolding disaster? Yes. Is climate change the only factor at play? No, of course not. So what's really going on? [Thread] #CAfire #CAwx #LAfires iopscience.iop.org/a...
January 9, 2025 at 10:05 PM
Is there a link between #ClimateChange & increasing risk/severity of #wildfire in California--including the still-unfolding disaster? Yes. Is climate change the only factor at play? No, of course not. So what's really going on? [Thread] #CAfire #CAwx #LAfires iopscience.iop.org/a...
I was hesitant to opine on unconfirmed but credible rumors earlier, but it unfortunately appears that the lightning-sparked #6-5Fire has indeed destroyed most of town of Chinese Camp. Other fires are threatening communities tonight. #CAwx #CAfire
Most of Chinese Camp has burned to the ground, according to Chronicle photojournalist @stephenlamphoto.bsky.social. Some residents of the historic Gold Rush town stayed to fight the blaze, despite evacuation orders.
#CAwx #CAfire
www.sfchronicle.com/california-w...
#CAwx #CAfire
www.sfchronicle.com/california-w...
September 3, 2025 at 4:22 AM
Welp. 2 California NWS offices--covering entire Sacramento/ San Joaquin Valley region & adjacent foothills/mountains--are no longer operating 24/7 due to extreme understaffing & expanding cuts to NOAA/NWS. This is a very big problem! #CAwx #CAfire #CAwater www.washingtonpost.c...
May 15, 2025 at 5:00 PM
Welp. 2 California NWS offices--covering entire Sacramento/ San Joaquin Valley region & adjacent foothills/mountains--are no longer operating 24/7 due to extreme understaffing & expanding cuts to NOAA/NWS. This is a very big problem! #CAwx #CAfire #CAwater www.washingtonpost.c...
Given the very active thunderstorm/wildfire pattern in northern/eastern CA and the broader West over the past 48 hours, I expect this will be an especially interesting session... 👀 #CAwx #CAfire
I'll host a live "virtual office hour" session on Tue, Aug 26 @ 4pm PT to discuss the recent SW heat (and ongoing PacNW heat) as well as the widespread monsoonal thunderstorm and wildfire outbreak in recent days. Expect a live radar/satellite tour! #CAwx #CAfire
Weather & climate office hour 08/26/25: Western U.S. heat, monsoon thunderstorm, & wildfire update - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
youtube.com
August 26, 2025 at 9:44 PM
#GarnetFire making another big/high-intensity run today (could double in size by tomorrow) characterized by multiple big pulses of pyrocumulonimbus (pyroCb, or "fire thunderstorm") activity as it "fills in the gaps" between recent fire footprints in/near Sierra NF. #CAwx #CAfire
August 27, 2025 at 11:08 PM
#GarnetFire making another big/high-intensity run today (could double in size by tomorrow) characterized by multiple big pulses of pyrocumulonimbus (pyroCb, or "fire thunderstorm") activity as it "fills in the gaps" between recent fire footprints in/near Sierra NF. #CAwx #CAfire
In case you missed it live yesterday and are wondering about the heat/wildfire/thunderstorm potential this weekend in California, this session was recorded live and is available below! #CAfire #CAwx
I'll host a live weather & climate virtual office hour at 3pm PT on Wed, Aug 20. I'll talking about the significant heatwave to come across CA & U.S. SW later this week--including rising wildfire risk & potential for a monsoonal moisture surge! #CAwx
Weather & climate office hour 08/20/25: Rising California heat, wildfire risk, & monsoonal moisture - YouTube
The latest in a recurring series of live, virtual, & interactive "office hours" hosted by Dr. Daniel Swain on various topics related to extreme weather and c...
www.youtube.com
August 21, 2025 at 8:24 PM
January 13, 2025 at 10:04 PM
Some new fires popping up today--some ignited by lightning yesterday. #GarnetFire on Sierra Nevada west slope is putting up a striking pyrocumulus plume (transitioning toward pyrocumulonimbus--a "fire-generated thunderstorm" cloud) under continued hot & unstable conditions. #CAwx #CAfire
August 24, 2025 at 10:26 PM
Some new fires popping up today--some ignited by lightning yesterday. #GarnetFire on Sierra Nevada west slope is putting up a striking pyrocumulus plume (transitioning toward pyrocumulonimbus--a "fire-generated thunderstorm" cloud) under continued hot & unstable conditions. #CAwx #CAfire