Atmospheric river brings extreme wind and precipitation to northern California

Atmospheric river
Atmospheric river funnels moist tropical air into northern California.

The atmospheric river of moist tropical air being funneled into northern California continues to dump very large amounts of precipitation in areas suffering from five years of drought.

The rain began Wednesday, January 4 and is predicted to continue at least into Wednesday of this week. Some areas have received between 5 and 9 inches of precipitation since Friday.

Atmospheric river extreme precipitation
Storm total precipitation in selected northern California locations, 5 p.m. Friday 1/6 through 5 p.m. Sunday 1/8.

The National Weather Service office in Reno, Nevada reported that multiple wind sensors recorded gusts Sunday morning that exceeded 170 mph.

Atmospheric river extreme wind
Extreme winds gusting above 170 mph were reported by the National Weather Service office in Reno, Nevada, Sunday January 8, between 6:45 a.m. PST and noon. Posted by the NWS at about noon local time on Sunday.

Some areas in the Sierra Nevada mountains could see another 3 to 7 inches of precipitation between Monday and Wednesday. Flooding is being reported in many areas.

Atmospheric river extreme precipitation
Precipitation forecast for northern California Monday 1/9 through Wednesday 1/11.

National Park Service officials evacuated the valley in Yosemite National Park Friday except for essential personnel.

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Wildfires burn millions of acres in Argentina

Most of the fires are in the provinces of La Pampas, Rio-Negro, and Buenos Aires.

Wildfires in Argentina have burned approximately 2.47 million acres (1 million hectares) over the last several weeks. On December 22 NASA satellites started detecting heat from fires that grew to become some of the larger blazes on the east side of the country 90 miles (145 kilometers) west of the coastal city of Bahia Blanca.

Fires Argentina
Fires detected by NASA satellites in Argentina December 22, 2016.

Below is an excerpt from an article by NASA, and following that is a series of five more satellite photos showing the progression of the fires up through January 6:

Severe drought during the winter and spring of 2016 in northeastern Patagonia played a large role in the current fires, said Guillermo Defossé, a professor of ecology at the National University of Patagonia San Juan Bosco and researcher for the Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), an organization that monitors Patagonian forests.

“While historically these ecosystems were fire prone, during the last century the number of wildfires severely declined as a consequence of a great grazing pressure—grazers consumed all fine fuels that otherwise will carry the fires—and a successful policy of fire exclusion,” Defossé wrote in an email. “This masked, in part, the fact that these ecosystems are naturally highly flammable, with a fire recurrence time of about 20–25 years. During the last 10 years, however, a very sharp decline in wool prices and continuous drought—probably due to climate change—made several ranchers to reduce the number of sheep or directly abandon the ranching activity. This abandonment increased the availability and amount of fine fuels.”

Fires Argentina
Fires detected by NASA satellites in Argentina December 27, 2016.

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Wildfire potential, January through April

With huge amounts of rain and snow hammering California and Oregon, few people in those areas are thinking about wildfires this week.

But in spite of the rain delivered to the west coast on what meteorologists are calling an “atmospheric river”, on January 1 the Predictive Services section at the National Interagency Fire Center issued their Wildland Fire Potential Outlook for January through April. The data represents the cumulative forecasts of the ten Geographic Area Predictive Services Units and the National Predictive Services Unit.  If their predictions are correct, in February wildfire activity could begin to pick up in parts of Texas, Oklahoma, Kansas, and New Mexico, with Florida and Georgia getting busier in March and April.

Below are the highlights of their report. Following that are outlooks for February through April, temperature and precipitation forecasts, and the Drought Monitor.

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“To begin 2017 significant wildland fire potential will be normal throughout entirety of the United States, except for below normal in Puerto Rico. For the majority of the U.S. this normal condition means that significant wildland fires are unlikely and normal indicates an out of fire season condition.

Beginning in February the seasonal increase in wildland fire activity will begin in the southern plains where the combination of abundant fine fuels and the potential for dry and windy conditions will occasional come together to produce periods of significant fire activity impacting the Southwest, Rocky Mountain and Southern Areas.

After February predictions for significant fire activity become increasingly difficult. It is likely that the same fire potential will continue across the southern plains, but pregreen up fires will also become increasingly likely in a large portion of the U.S. These fires are difficult to predict and rely on short term localized significant weather events.

Also during this period it is likely that we will see the onset of fire activity in south central Alaska, where warmer and drier than typical winter conditions are occurring.

Significant fire potential will also increase to above normal in Florida and portions of Georgia. Long term drought remains the primary concern in this area and moisture deficits in this area are likely to lead to occasional fires that burn deep into the soil layer and are more difficult to suppress.”

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Beginning the 9th year of Wildfire Today

9th year Wildfire Today

Sunday the world marked the end of 2016, seen as a tough 12 months by some. But at Wildfire Today we are looking back with fond memories at the last 8 years as we begin our 9th. Our site was born January 6, 2008 with a rather modest post.

The success of the site would not have been possible without the loyal readers who come back on a regular basis, read the articles, leave insightful comments, and occasionally send us a message informing us of breaking news in the world of wildland fire.

So, a big Thank You to those who have visited or contributed in various ways over the last 8 years! We couldn’t have done it without you!

NPR on allowing fires to burn

The lack of aggressive action during the early days of the Chimney Tops 2 Fire that burned more than 2,000 homes in Gatlinburg, Tennessee has ignited discussions about allowing some wildfires to spread under predetermined conditions.

National Public Radio explores how four national forests in California are modifying their fire strategy. (Less than 4 minutes.)