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Rains Ease Calif. Drought, Make Wildfire Outlook Grimmer

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The massive Pacific storms that streamed onto the California shoreline dropped a lot of rain, but they did little to ease long-term drought conditions and may end up exacerbating what is already expected to be a disastrous wildfire season.

This week’s U.S. Drought Monitor, released Thursday morning, shows that the “blockbuster” storms that lasted from Feb. 26 to March 2, dropped as much as 75 percent of the moisture some California cities have received all season. Burbank received 4.78 inches of its 5.28-inch season-to-date rainfall total and downtown Los Angeles received 4.52 inches of its 5.72-inch total.

Credit: U.S. Drought Monitor

The cruel irony is that the much-needed moisture may end up making a wildfire season expected to be catastrophic even worse than it would have been if the region had stayed completely dry.

“The initial impact will be to dampen the immediate impact of fires,” said Drought Monitor author Brad Rippey, a meteorologist for the U.S. Department of Agriculture in Washington, D.C.. “But this rain will be enough to promote spring growth of vegetation that may otherwise have been dormant because of the drought. There may actually be more to burn, at least the lighter fuels, than if it had stayed dry all the way through.”

Grasses will sprout and grow because of the rains, then they’ll quickly dry out and provide easy fuel for a major wildfire, he said.

“I do unfortunately expect another active wildfire season in Northern California,” Rippey said.

The Drought Monitor update shows that more than half the contiguous U.S. — 53.47 percent — is abnormally dry or experiencing drought, with exceptional, or the most severe drought conditions affecting 1.57 percent of the country. For both figures, that’s less than 1 percent improvement over last week’s Drought Monitor.

Most of the worst drought conditions are in Nevada and California. Nearly 95 percent of California is in drought and 22.37 percent of the state is experiencing exceptional drought. That’s slightly better than last week, when 26.21 percent of California was exceptionally dry.

Credit: Climate Central

Last week’s California storms tracked too far south to provide adequate moisture in many of the most important Sierra Nevada watersheds, focusing instead on the state’s coastal areas.

“It was great for groundwater recharge, but it doesn’t do a whole lot for the water supply outlook,” Rippey said. “For agricultural areas of California, it’s really the Sierra Nevada that drives the agricultural irrigation.”

For farmers, the storm helped ease the drought slightly, reducing irrigation requirements for drought-stricken crops and it may help winter grains and pastures bounce back, he said.

“Unless we get more storms, we’ll still end up with a third consecutive year of drought,” Rippey said. “I think it’s almost a guarantee.”

Some areas of California, including the Los Angeles Basin, need more than 20 inches of rain in the span of a month to end the drought. According to an updated estimate from a National Weather Service office in California, the odds of that happening are now 1-in-200.

No major storms are in the forecast for California in the next two weeks, Rippey said.

Comments

By Henry
on March 7th, 2014

Never anything positive, always looking for the dark side of any good news! Why is the environmental movement so anti everything these days? I honestly think this is causing a great loss of faith in the movement these days.

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By Stone (Brandon/Mississippi/39047)
on March 9th, 2014

Henry, I’m not sure what your complaint is. Are you implying that it is the objective of Climate Central to seek and report unhappy news just because its negative? Also, are you implying Climate Central is sponsored by or promoting some particular “environmental movement” like Green Peace? They report scientific information for the general public, and unfortunately, climate change will never be happy or pretty news. In my opinion, it should be unhappily truthful to motivate the public (and hopefully politicians) to take action.

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By Phil Johnson (Boulder Creek, CA 95006)
on March 14th, 2014

“Sow the wind, reap the whirlwind”. Lack of positive climatic news is only the least of our problems that we all have brought on ourselves and is an ominous indicator of how important instant gratification has become in life. What we can do is UNITE behind making sure our leaders, worldwide, become aware of this fact, which should galvanize the global body politic to sponsor and enable creative ways to salvage what is left - for our kids, if for no other reason.

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