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Daniel Swain Nov 20
Replying to @Weather_West
Fire risk could also creep back up over portions of SoCal, where temps have been warm recently & which are unlikely to see any precip at all heading into early Dec. All that said: things are definitely looking much better on wildfire front in most spots vs. Oct.
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Daniel Swain Nov 16
Widespread beneficial rain & mountain snow Tues-Weds across NorCal. Up to a couple inches in typical wet spots in foothills/North Coast, and up to half inch or so near SF Bay Area. This will be "fire season ending" rain in some areas--including portions of Bay Area!
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Daniel Swain Nov 23
Replying to @Weather_West
Temperatures will start off close to (or even slightly below) avg this week, but will likely trend toward above avg by early Dec. Offshore/Santa Ana winds possible across SoCal at times, and unfortunately wildfire risk could be quite high across southern 1/3 of CA.
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Daniel Swain Nov 17
And there's even some (dry, powdery) snow in foreground! Just an incredible testament to how exceptionally dry vegetation was following all-time record heat these past few months. Also quite a contrast to widespread precip on Sierra west slope right now.
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Daniel Swain Nov 20
Replying to @Weather_West
Recent rains greatly reduced wildfire risk across most of NorCal, & were "season ending" in some places. But there are still areas where there has not yet been enough precip this season to fully dampen risk (as we saw earlier this week along Hwy 395 corridor).
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Rob Elvington WAAY 31 Nov 17
Explosive growth of the on the Fire-Temperature satellite product. Those standing mountain wave clouds nearby the fire are indicative of the 70-80 mph winds in the higher elevations.
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Daniel Swain Nov 18
Granted: wind-driven cool-season wildfires on eastern (lee side) slopes of the Sierra are not unheard of (much rarer on western slopes). But this was an exceptionally intense and fast-moving fire that apparently destroyed much of the small town of Walker, CA.
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NWS Bay Area Nov 21
We've had some rains recently, but SoCal is still in fire weather season.
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US StormWatch Nov 17
Shaping up to be the first widespread rain event of the year in all Bay Area locations with widespread rainfall currently moving through the North Bay. This could be the event in many Northern California locations that ends wildfire season.
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US StormWatch Nov 20
The latest ensemble data (GEFS) shows virtually no rainfall across all of California over the next 10+ days with the storm track well north of the state. Many locations, especially in Central and Southern California have yet to receive fire season-ending rainfall.
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Daniel Swain Nov 17
Fire Season 2020 not going out quietly. Very strong pre-frontal winds along the eastern slopes of the Sierra Nevada (prior to arrival of any rain or snow) are driving several new and fast-moving wildfires as vegetation is still extremely dry in these regions.
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US StormWatch Nov 21
While fire danger has been mostly neutralized across Northern California by recent storms, fire danger remains extremely high across Central and Southern California (near the coast) with fuel moisture near all-time low levels for this time of year.
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Daniel Swain Nov 16
For the rest of November: actually not a bad outlook for NorCal. Near to perhaps slightly above average precip for the 2 week period, with below average precip across SoCal. Temperatures may be pretty close to average following today's SoCal heat, too!
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California State Association of Counties® Nov 20
Called “the fire-breathing dragon of clouds” by , Pyrocumulus Clouds have been abundant during ’s worst fire season on record. Learn the science behind these these fiery behemoths and how they affect : h/t
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US StormWatch Nov 17
The shows no signs of slowing down this evening with another pyrocumulus cloud developing around 9:15 PM reaching up to 20,000'. It really takes a special set of circumstances for fire behavior to occur like this at night during mid-November.
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Neil Lareau Nov 17
Interesting radar loop showing the sharp cutoff in the incoming precipitation due to the downslope flow across the and two rapidly developing wildfire plumes on the lee side.
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US StormWatch Nov 19
Using the latest MODIS and VIIRS fire detection data it appears the ran ~10 miles east across the California/Nevada border likely in under 12 hours. This is an unprecedented rate of spread for a fire in this region, especially in mid-November.
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Daniel Swain Nov 17
Just to be super clear--seeing plume-dominated fire behavior & large pyrocumulonimbus plumes on wildfires *anywhere* in American West is pretty extraordinary by late November. Wow.
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CA SNC Nov 20
Congratulations to the Partnership on receiving this award! Investing in large, landscape-scale forest and watershed restoration is critical to reducing wildfire risk and increasing ecosystem resilience.
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Daniel Swain Nov 17
Unfortunately, strong pre-frontal strong wind gusts (65+ mph) arriving in advance of widespread precip elsewhere in NorCal are driving several new/fast-spreading fires along Hwy 395 corridor this PM. Conditions may improve later today with arrival of precipitation.
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