June 20, 2016
by Historical Climatologist Evelyn Browning-Garriss & Climatological Analyst James J. Garriss
What does it take to boil an egg? Submerge it in hot water. What does it take to boil a continent? We are finding out.
North America is surrounded by hot water and summer breezes are wafting that hot humid air inland. This last weekend, almost everyone got to “Feel the Burn.”
The major El Niño that heated 10 percent of the globe just ended. Not surprisingly, is caused the hottest May since records began in the 1970s. Now the air masses from the tropics will dominate summer and they are Hot, Hot, Hot! As a result, most to the US and large parts of Canada are steaming.
Even though the hot El Niño has officially ended, that hot water has not disappeared. The hot Tropical Pacific water crashes into South America and then flows north and south along the west coast of the Americas. The prevailing westerly winds carry that hot marine air inland, creating some nasty heat in the Western, particularly the Southwestern states, including West Texas.
The good news is that the springtime El Niño left most of the US with normal to above-normal supplies of subsurface and reservoir water. It lasted long enough to bring usual flooding rains to Texas and parts of the Midwest. Unfortunately, now that El Niño is gone and the current heat is drying the surface water. When weather gets hot enough, it can create “flash droughts” so that even areas with near normal rainfall have so much evaporation that the ground dries up. The US Drought Monitor is reporting a 10 percent increase in dryness over the last month.
As La Niña develops, the cooler tropical air holds less moisture. Typically, the Gulf and Southeast Coast get heavier rainfall and less moisture travels inland to the Great Plains and Midwest. This creates particular difficulties for rangelands and late planted crop that don’t have access to irrigation or water supplies. For those that have conserved their water supplies, the warmth ripens crops early and makes harvests easy. Historically, this is the type of year that intelligent water management makes the difference between a solid profit or a potential loss. – TBB
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The Browning Blog: How to Boil A Continent
June 20, 2016