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Joshua Feldman

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The seemingly endless wave train of low pressure systems emanating from the Northern Pacific will continue chugging along throughout the upcoming week. The train will make stops along the West Coast of the US and Canada this week, resulting in a progressive weather pattern largely identical to that which spawned this weekend’s historic snowstorm in parts of the Southeast. Another storm is expected to intensify in the Gulf of Mexico in response to the wave’s eastward propagation late this week into the weekend. Though widespread snow is not expected at this time, the overall pattern and large spread in guidance suggest it cannot be discounted everywhere entirely. Last month we warned in our winter forecast that most of the storms impacting the eastern US during the first half of winter would originate in the Gulf of Mexico or the lee side of the Rocky Mountains, partially as a consequence of…

It’s the first full week of meteorological winter and winter’s cold is already poised to invade nearly the entire contiguous US.  Although the cold is not expected to test any records, that almost the entire span of the lower 48 will be simultaneously encapsulated by colder than normal temperatures is unusual. In this active weather pattern however, the cold will not necessarily persist. A messy upper-air pattern involving a train of relatively small but potent blips in the jet stream has resulted in Canada’s reservoir of cold spilling southward across the majority of the lower 48. Some of the individual systems that contributed to this pattern were responsible for flooding rains on the West Coast and a rare tornado outbreak in the Midwest. Monday afternoon, the jet stream wrapped uniformly around the southern tier of the US without buckling such that there was very little east/west variance in temperature. The…

Meteorological winter is officially here. Just two days into the season, a cross-country winter storm is already on the horizon for late this week. It has the potential to bring flooding rains, ice, and heavy snow from California to Maine. This is your Sunday Storm. The precursor to the potential winter storm is a powerful 983 mb extra-tropical cyclone swirling over the northeastern Pacific Ocean between Alaska and British Columbia.  Its moisture feed is flowing along a vast and vigorous atmospheric river stretching nearly 2000 miles from the tropical eastern Pacific to the seas just south of the Gulf of Alaska.  The storm and its moisture feed will travel southeastward toward California alongside a broadening planetary wave of low pressure and weaken as it approaches land. The surface low and its parent trough will bring heavy rain to parts of California Tuesday through Thursday and the Desert Southwest Thursday through Friday…