.comment-link {margin-left:.6em;}

Saturday, May 17

USA's Expanding, Intensifying Drought. Also note use of what is now the most popular mantra in USA: "However, they did not anticipate"

See the Mashable website for links to sources mentioned in the following report. The title is misleading because the report isn't only about California's drought; it's also a helpful overview of where the 2014 drought is in the USA:
California Suffers Astonishingly Fast Snowpack Melt as Drought Intensifies
by Andrew Freedman
April 17, 2014
Mashable

The severe drought that threatens water supplies and a potentially devastating wildfire season is deepening and locking into place across much of the far West, Southwest and Southern Plains, according to new climate data released Thursday.

In California's Sierra Nevada Mountains, where runoff from the spring snowpack provides much-needed water supplies during the dry season, half of the snowpack's liquid water equivalent melted in just the past week in some areas, due to temperatures that soared as high as 12 degrees Fahrenheit above average of early April, according to the U.S. Drought Monitor.

To make matters worse, the sudden snow melt in California barely boosted reservoir supplies, which remain well below average across the state. See also: "Snow Survey Reveals Depth of California's Water Woes"

Officials already knew that the snowpack was unusually thin and would provide below average amounts of water when it melted, considering that the state had its third-driest winter on record, following its driest calendar year in 2013. However, they did not anticipate it would melt so quickly.

The California state snow survey on April 1 found that the snowpack contained just 32% of the average water content at that time of year, when snowpack typically reaches its annual peak. This placed 2014 as among the lowest water-content years on record since such data [collection] began in 1930.

The California drought is part of a broader regional drought that encompasses parts of Oregon, Nevada, Colorado, Utah, Arizona, New Mexico, Texas and Oklahoma, among other areas.

In a conference call with reporters on Thursday, scientists from the National Oceanic and Atmospheric Administration (NOAA) said the California drought is likely to persist throughout the summer, after average precipitation fell during March. This precipitation failed to make up for the deep precipitation deficits the state had been running.

Southern Plains Drought

According to NOAA, drought has expanded and intensified in the Southern Plains as well, where parts of Oklahoma and Texas have been stuck in devastatingly arid conditions since 2010.

The geographic extent of extreme and exceptional drought has increased nearly four-fold in Texas, more than five-fold in Oklahoma, and nearly six-fold in New Mexico since the beginning of winter, according to David Brown, a NOAA climate specialist.

New Mexico has had its third-driest start to the year, and Oklahoma and Texas have each had their sixth-driest starts to the year, Brown says.

Nearly two million Southern Plains residents are currently living in areas with "extreme" or "exceptional" drought conditions, which are the two worst categories on the Drought Monitor's scale.

The number of affected residents more than doubled since the start of winter, according to Brown. Most of these people are in west Texas and the Texas panhandle, including the cities of Lubbock, Amarillo and Wichita Falls.

Texas Drought Monitor [see website for visual]
[...]
In Wichita Falls, city officials are preparing to raise their water restrictions to an unprecedented "Stage 5" emergency, which would trigger dramatic restrictions on water use.
[...]
Since the start of the drought in October 2010, Wichita Falls has had about 58 inches of rain (and melted snow and ice), Brown said. The typical amount for that period of time is 100 inches. This means that the city needs to make up about a year and a half's worth of precipitation. Alleviating the drought this spring and summer, Brown says, "would really take an unprecedented amount of spring rainfall."

Victor Murphy, a NOAA meteorologist, gave Mashable further details on Wichita Falls' plight. He said data shows that the past 42 months have been the driest such consecutive period on record in that city, eclipsing any of the drought years in the 1950s and the 1930s "Dust Bowl" era.

For water planning purposes, the early 1950s drought is considered to be the drought of record, meaning that the current drought is worse than what policymakers may have prepared for.

The drought is raising concerns about wildfires and massive dust storms this summer, and has already caused an agricultural disaster in the Southern Plains.
[...]
Although May and June are Texas and Oklahoma's wettest months on average, there is such a big rainfall deficit in parts of these states that the drought will almost certainly not be fully eliminated.

If an El NiƱo event develops as expected by the fall, it could lead to unusually wet conditions from California to Texas next winter, but that is neither guaranteed to happen, nor would it be of any help in the short term.
[...]
And now a few words about Mashable, from their website:

"Mashable is a leading source for news, information and resources for the Connected Generation. Mashable reports on the importance of digital innovation and how it empowers and inspires people around the world. Mashable's record 34 million unique visitors worldwide and 15 million social media followers are one of the most influential and engaged online communities. Founded in 2005, Mashable is headquartered in New York City with an office in San Francisco."

********
Comments: Post a Comment

Links to this post:

Create a Link



<< Home

This page is powered by Blogger. Isn't yours?