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Nearly every part of the United States is getting walloped by wild weather or just about to be.<\/p>\n
Days of downpours have begun in Hawaii. The Southwest will soon bake with day after day of record 100-degree-plus (38 Celsius-plus) heat. Two storms will dump snow by the foot over northern Great Lakes states. And the dreaded polar vortex will again invade the Midwest and East with soul-crushing Arctic chill.<\/p>\n
This forecast of extremes comes as weather whiplash already hit much of the East. On Wednesday, Washington, D.C. residents walked around in shorts in record-breaking 86 degrees Fahrenheit (about 30 Celsius). On Thursday, it snowed.<\/p>\n
\u201cAll of the country, even if you\u2019re not necessarily seeing extremes, are going to see generally changing from cold to warm, or warm to cold to warm,\u201d said meteorologist Marc Chenard of the weather service\u2019s Weather Prediction Center in Maryland.<\/p>\n
Former National Oceanic and Atmospheric Administration chief scientist Ryan Maue said he expects extreme weather in all 50 states.<\/p>\n
Triple-digit heat persists in Southwest<\/p>\n
A heat dome will form early next week and park over the Southwest, baking temperatures to triple digits that haven\u2019t been seen this early in the year, Maue and Chenard said.<\/p>\n
Some forecasts see 98 (almost 37 Celsius) in Phoenix on Tuesday, followed by 103, 105 and two days of 107 (almost 42 C). In 137 years of record-keeping, Phoenix never hit 100 before March 26 and usually hit its first 100-degree day in early May, according to the weather service, which warned people: \u201cSince we are not acclimated to this level of heat this early in the year, it will be more impactful than usual.\u201d<\/p>\n
It has already started in Los Angeles with\u00a0unusual 90-degree March weather\u00a0that had people in shorts and tank tops seeking shade anywhere they could get it, even if it was as slender as a light post.<\/p>\n
Shane Dixon, 40, usually runs about 5 miles near his home in Culver City without much effort, he said, his face glistening with sweat and his T-shirt tucked into his shorts. But Thursday was hard because of the heat, and he had to cut it short.<\/p>\n
\u201cThe back of my neck was melting,\u201d he said. But he preferred it to the cold and snow that will hit elsewhere.<\/p>\n
\u201cI could go literally soak myself and walk out in the sun and I\u2019ll make it home fine. If it was freezing cold I could not do this,\u201d he said.<\/p>\n
Single-digit cold invades North<\/p>\n
Around the same time as the heat starts blasting Phoenix, the polar vortex \u2014 a system that usually keeps frigid air penned up near the North Pole \u2014 is forecast to send its chill deep into the Midwest and East, even bordering some of the Southeast, Maue said<\/p>\n
Minneapolis will hover around zero for a low, and Chicago will be in the single digits Tuesday. The next day \u201ctemperatures in the teens and 20s in the northeast and 20s in the Mid-Atlantic,\u201d Maue said. Even Atlanta could drop to the 20s.<\/p>\n
One-two snowstorm punch<\/p>\n
Two storm systems in a row \u2014 one Friday, then another Sunday into Monday \u2014 will chug along the country\u2019s northern tier and Great Lakes and between them could dump 3 to 4 feet of snow in places, Maue said.<\/p>\n
That bigger second storm system will see its barometric pressure drop so quickly and sharply \u2014 meaning it is intensifying and winds are strengthening \u2014 that it will qualify as a bomb cyclone, which is quite unusual to develop over land. Normally bomb cyclones get their energy from warm ocean waters, but this one will draw power from the polar vortex.<\/p>\n
Even Alaska and Hawaii aren\u2019t quite right<\/p>\n
Maue said Hawaii is getting an atmospheric river that will have such persistent heavy rain that flooding will be a major issue. Oahu is under a flash flood warning.<\/p>\n
And Alaska is normally frigid now, but it will be about 30 degrees colder than usual, he said.<\/p>\n
It is \u201cthe time of year where we can see stuff like this,\u201d Chenard said. \u201cBut this does seem even anomalous from what you would typically see. I mean, some of these areas will be setting records. Record-high temperatures for March and maybe multiple times.\u201d<\/p>\n
In the past week or so, tornadoes have killed at least eight people in\u00a0Oklahoma, Michiganand Indiana. The forecast for severe storms doesn\u2019t look as big or widespread for the next week, but dangerous thunderstorms could pop up \u201canywhere from the Mississippi Valley toward the East Coast\u201d on Sunday or Monday, Chenard said.<\/p>\n
The jet stream goes nuts<\/p>\n
Underlying this is a jet stream gone wild, Maue and Chenard said.<\/p>\n
The jet stream is the river of air that moves weather from west to east on a roller-coaster-like path. Usually the plunges are as mild as a kiddie roller coaster. But now that jet stream is going on near-vertical, scream-inducing drops following by straight-up ascents.<\/p>\n
\u201cWhich means you get a lot of extremes next to each other,\u201d Maue said. Storm fronts coming from the Pacific hit that high pressure heat dome in the Southwest and are pushed north to climb that mountainous jet stream peak, \u201cgrab access to that cold air reservoir up there\u201d and bring it back down south down the other side of the hill, he said.<\/p>\n
Numerous studies have connected\u00a0unusual jet stream\u00a0and\u00a0polar vortex\u00a0activity to shrinking Arctic sea ice and\u00a0human-caused climate change.<\/p>\n
But there is hope.<\/p>\n
\u201cThe first day of spring is 20th (of March), and then after that we get recovery,\u201d Maue said.<\/p>\n
___<\/p>\n
Associated Press writer Dorany Pineda contributed from Los Angeles.<\/p>\n
#U.S #hit #weather #sampler #platter #week #heat #snow #hitting #records<\/p>\n","protected":false},"excerpt":{"rendered":"
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