Dr. Jeff Masters' WunderBlog

California fires could reach record levels in 2008
Posted by: Dr. Jeff Masters, 21:42 GMT le 25 juin 2008 +5
An unusually early and dangerous fire season has hit California, where at least 33 fires burning over a total of 190,000 acres are active, according to the Interagency Fire Center. The fires were sparked over the weekend when an unusually far southward-moving storm system brought numerous thunderstorms to central and northern California. Over 8,000 lightning strikes hit the region. Most of these strikes were not accompanied by rain, since a very dry atmosphere at low levels caused much of the thunderstorm rain to evaporate before reaching the surface. The lightning strikes ignited an unusual number of fires, due to exceptionally dry vegetation in California. This year, the state experienced its driest spring season (March-April-May) since record keeping began in 1895, and much of the state is in moderate to severe drought.


Figure 1. Visible satellite image from NASA's Aqua spacecraft on Monday, June 23, 2008, showing smoke from hundreds of wildfires sparked by lightning in California. The red regions show where the satellite's sensor detected fires burning. The smoke has created air pollution levels in excess of the federal standards for fine particulate matter (PM2.5) over much of California's Central Valley. Image credit: NASA.

The forecast
With the dry season only beginning, it could be a record fire year in California. Even before last weekend's lightning storms, California had already seen an unusually large number of destructive wildfires, according to CalFire--90,000 acres had burned, compared to 42,000 acres during the same period last year. It is not unusual for large portions of the state to receive no rain at all in July and August, such as occurred last year (Figure 2). The jet stream typically moves far enough north in summer that the migrating low pressure systems that bring California most of its rain only hit the northernmost portions of the state. With high fuel levels due to a century of misguided fire suppression efforts, moderate to severe drought gripping the state, no rain in sight for months to come, and an above-normal chance of warmer than average temperatures forecast this summer for the state by NOAA's Climate Prediction Center, expect a record fire season in California.


Figure 2. Observed precipitation over California during 2007. Much of the state received no rain at all during July and August, which is a common occurrence. A little bit of thunderstorm activity did make it into the easternmost portion of the state, thanks to moisture flowing north-westward from the Arizona Monsoon. However, the Sierra Mountains block this moisture from reaching the central and western portions of the state. Image credit: NOAA.

Tropics
It's quiet in the tropical Atlantic. There are no threat areas to discuss, and none of the models are forecasting tropical storm formation in the next seven days. Beyond a week from now, the GFS is hinting that the region off the coast of Africa could see some development, but it is still probably too early for this too occur, despite warmer than average sea surface temperatures in the region.

Jeff Masters
San Bruno Mountain Fire - Cresting the Ridge (ajkimoto)
Photo taken as the fire crested the ridge of San Bruno Mountain
San Bruno Mountain Fire - Cresting the Ridge
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Categories: Fire
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401. catastropheadjuster 18:40 GMT le 26 juin 2008    
JP you got that right, he threaten to kill me. amost the other nasty stuff he said.
Sheri
Member Since: 24 août 2006 Posts: 21 Comments: 3556
402. sonofagunn 18:40 GMT le 26 juin 2008    
Long range radar from baynews9.com shows a little circulation West of Tampa, but, in my ignorant opinion, little swirls like these seem pretty common in fronts and tropical waves and don't really mean anything.

I'm sure all tropical systems start as a tiny swirl, but I doubt these are anything important. But again, IANAM
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404. catastropheadjuster 18:40 GMT le 26 juin 2008    
His handle is Tropicaldiscussion
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406. Stormchaser2007 18:41 GMT le 26 juin 2008    
Sheri is it possible to send me that message? I want to show admin.
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407. weathermanwannabe 18:42 GMT le 26 juin 2008    
The GOM "clouds" are not likely to develop into anything and starting to lose convection as we speak (too much shear right now); we may not even get that much rain from it at this point; as the Godfather said, "there just wasn't enough time Michael, there just wasn't enough time........."........
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408. Stormchaser2007 18:43 GMT le 26 juin 2008    
.
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409. Patrap 18:43 GMT le 26 juin 2008    
Listen, the drama isnt for the main Blog .

I know its frustrating,but just forward any threats to admin and they will take care of that asap.

The Rules of the Road are very specific on Threats.

Use the ignore feature and just let fools fall to the wayside.
Member Since: 3 juillet 2005 Posts: 372 Comments: 111626
410. TampaSpin 18:44 GMT le 26 juin 2008    
NE of the Yucatan is really firing
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411. catastropheadjuster 18:45 GMT le 26 juin 2008    
jp i copied it and sent it to DrM's E-mail I hope I didn't do wrong.
Sheri
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412. Buhdog 18:48 GMT le 26 juin 2008    
Could all of this high cloud moisture from the gulf actually supress some of the rain? Alot of the moisture you see coming into SWFL is not making it to the ground, however the clouds are keeping temps down and that should supress some storms right?
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413. catastropheadjuster 18:48 GMT le 26 juin 2008    
SC2007 u got mail
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414. TerraNova 18:49 GMT le 26 juin 2008    
398. TampaSpin 1:39 PM EST on June 26, 2008
Terra convection is really gathering at that spin location the last 2 updated satellite pics...


Yep I saw that, question is whether it can manage to do anything before it comes ashore in Florida. Wind shear is pretty high in that area (you can see the convection getting sheared off to the NE on visible imagery).
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415. Stormchaser2007 18:49 GMT le 26 juin 2008    
Sheri, you should have sent the email to Admin....Dr.M is only a meteorologist on this site.
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416. presslord 18:50 GMT le 26 juin 2008    
ah...actually...he's one of the owners....and it's his blog.....
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417. TerraNova 18:51 GMT le 26 juin 2008    
Weather456 , did you get the link I sent you earlier? Here it is again in case you didn't...Buoy Data Graphs
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418. smmcdavid 18:53 GMT le 26 juin 2008    
Well, apparently all the excitement is on the blog today instead of outside! I must have missed something big.

Anything new I should know about.... with the weather/tropics I mean.
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419. Patrap 18:53 GMT le 26 juin 2008    
Thats a Transformer going "Boom" at the 1:23 mark,from 25 minutes ago here.

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420. TampaSpin 18:54 GMT le 26 juin 2008    
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421. Stormchaser2007 18:55 GMT le 26 juin 2008    
416. Oh sorry! Thanks press....
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422. Drakoen 18:55 GMT le 26 juin 2008    
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423. surfmom 18:55 GMT le 26 juin 2008    
good to hear the is light at the end of the tunnel Preslord ! first born has been a cat 5 hurricane from day one LOL --but now that he's found his career/commercial diving (returning to his first love the sea) he's got his act together. Number two, has always been Good Weather
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424. Cavin Rawlins 18:55 GMT le 26 juin 2008    
Oh Terra thank you...I didnt get it earlier.
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426. TerraNova 18:57 GMT le 26 juin 2008    
418. smmcdavid 1:53 PM EST on June 26, 2008
Well, apparently all the excitement is on the blog today instead of outside! I must have missed something big.

Anything new I should know about.... with the weather/tropics I mean.


Don't worry you didn't miss much! There's an area of disturbed weather in the Gulf producing heavy rainfall over Florida/NE Gulf, with a possible midlevel circulation with it. Chances of development are slim...the whole thing will come ashore soon and wind shear is hostile in the area.

Also a bit of model excitement...GFS has been consistently showing a development in the Eastern Atlantic next week, and the CMC and ECMWF have begun to agree.
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427. presslord 18:58 GMT le 26 juin 2008    
my AC died last night...How the heck did people live here without it??? Was $256 to get it fixed...I'd have paid him 10 times that....
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428. TampaSpin 18:58 GMT le 26 juin 2008    
Terra did you just see the last imiage, it is really looks be trying to get together...hum.
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429. surfmom 19:00 GMT le 26 juin 2008    
I always say Presslord, that if they banned air-conditioners in Fl only the people who truly loved this state would be here. I live off fans during the day (yes i am a nut case) but I do run air at night
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430. TerraNova 19:01 GMT le 26 juin 2008    
428. TampaSpin 1:58 PM EST on June 26, 2008
Terra did you just see the last imiage, it is really looks be trying to get together...hum.


It does seem to be producing more convection but it's speeding off to the northeast, and will come ashore on the west coast of Florida likely before it can amount to anything. Environmental conditions are not very friendly in the area, with wind shear values running above 20 knots. This will more than likely be a heavy rain producer, nothing tropical.
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431. TampaSpin 19:04 GMT le 26 juin 2008    
430. TerraNova 3:01 PM EDT on June 26, 2008

Yep i agree....just interesting to watch.
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433. smmcdavid 19:06 GMT le 26 juin 2008    
Thanks Terra! Didn't know others models had started to agree.
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434. HurrMichaelOrl 19:06 GMT le 26 juin 2008    
Where are you located Petrap? Here in the Orlando area we has some strong winds with the storms that are rolling through, it looked like a tropical storm.
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435. Stormchaser2007 19:10 GMT le 26 juin 2008    
95EINVEST.25kts-1009mb
I see we have Invest 95E.
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436. weathermanwatson 19:11 GMT le 26 juin 2008    
Appears to be a weak circulation closing off west of Tampa, (per Tampa radar).
437. Patrap 19:11 GMT le 26 juin 2008    
<----Uptown New Orleans Link

Area Flood Advisory from that storm I videoed below Link
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438. TampaSpin 19:17 GMT le 26 juin 2008    
Look at about 26.2N 84.1W
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439. TerraNova 19:18 GMT le 26 juin 2008    
-
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440. surfmom 19:20 GMT le 26 juin 2008    
hmmmmmm, kinda in my neighborhood
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441. TerraNova 19:22 GMT le 26 juin 2008    
I see some turning about 80 nautical miles to the west of Tampa Bay. Again, it's very faint and I can't clearly make out a center, if there is one. I also see turning west of Naples. I circled the area in which the circulation "center" look like it's in out of the KBYX site:

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442. OUSHAWN 19:23 GMT le 26 juin 2008    
Tampa...

I like your spunk...lol. However, don't get to excited about the junk in the GOM. Too much shear and it's not forcasted to relax much and there still is the ULL sitting out there as well so very slim chance of anything happening.
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443. OUSHAWN 19:26 GMT le 26 juin 2008    
Also, you have to be very careful when looking at radar to try and determine a "spin". Radars are certainly not the best method to determine this...it can be deceiving.
Member Since: 20 septembre 2007 Posts: 0 Comments: 44
444. TampaSpin 19:26 GMT le 26 juin 2008    
442. OUSHAWN 3:23 PM EDT on June 26, 2008

Never said anything was developing just observing a spin to watch.......thats all..
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445. captainhunter 19:28 GMT le 26 juin 2008    
don't get to excited about the junk in the GOM. Too much shear and it's not forcasted to relax much and there still is the ULL sitting out there as well so very slim chance of anything happening.

Stranger things have happened but I think you're right about this one. ULL especially a problem.
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446. hurricane23 19:29 GMT le 26 juin 2008    
TerraNova check your mail!Thanks.
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447. OUSHAWN 19:29 GMT le 26 juin 2008    
I know Tampa, that's why I said I like your spunk. Believe me, I'm guilty a lot of jumping on "blobs" I see so I'm the last person who would throw stones. I'm just as green as they come at this so I'm here to learn more than anything.
Member Since: 20 septembre 2007 Posts: 0 Comments: 44
448. HIEXPRESS 19:34 GMT le 26 juin 2008    
These everyday thunderstorms here are certainly giving us the opportunity to train for driving during tropical storm conditions (B4 & after a hurricane).
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449. Buhdog 19:37 GMT le 26 juin 2008    
All of this rain is dying before it makes shore in SWFL....plus it looks like the seabreeze convection is moving north with this system....are we gonna stay dry in SWFL? our met says yes rain.....I am not sure
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450. TampaSpin 19:38 GMT le 26 juin 2008    
Dow is taking a hit today........wow
DJIA*
11,516.52 295.31 -2.50%
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451. Drakoen 19:44 GMT le 26 juin 2008    
The "spin" you guys are seeing is mid level convective vorticity. An upper level trough lies in the western Gulf of Mexico. The positive earth vorticity over the eastern portion of the trough is generating high nearly meridional upper level diffluent winds at 200hpa, unfavorable for tropical cyclone development.

The intense tropical convection over the inland areas is being supported by the seabreeze convergence. Convection is moving upward and westward as the flow at the lower levels from the subtropical ridge out to the east comes up from the south and southeast.
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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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