A very active end to the week is in store for the nation as a whole, especially as a severe weather outbreak continues to dominate the headlines. We’ll be tracking that as well as a storm moving onshore onto the West Coast while a dry and warm pattern builds across the East Coast.

Welcome to the Thursday edition of your Morning Briefing, where we’ll give you a quick rundown on everything you need to know weather-wise, every weekday morning. Let’s begin.

Multi-Day Severe Weather Outbreak Across Central US:

  1. Through at least Tuesday of next week, some parts of the Central US will be at risk for strong, damaging storms. This threat will really begin to ramp up on Thursday, but should become even more significant Friday into Saturday.
  2. On Thursday, the risk for severe weather will span from eastern Wyoming — possibly even farther west into areas near the northern Rocky Mountains — through the southern Great Lakes region.
  3. Several supercell thunderstorms are expected to form after sunset tonight across Nebraska and surrounding areas, which will pose the risk for tornadoes. Then as the night progresses, those storms should evolve into a weaker line of rain and thunderstorms.
  4. Friday will likely be a big day for severe weather. It will be a classic setup, with a digging jet stream over the western US thanks to an upper-level low. From West Texas up through South Dakota and even into parts of the Midwest, severe storms will be possible.
  5. This severe weather outbreak will persist into this weekend as well as into at least early next week. On Saturday, the severe weather threat will shift just to the east, putting much of the Plains at risk. That will shift even further east on Sunday toward the Mid-Mississippi River Valley. Then on Monday into Tuesday, a new storm system will bring the severe weather threat back to the southern Plains and lower Midwest. 

Storm Moves Into West Coast:

  1. A large storm system continues to move onshore of the West Coast, bringing an unusual round of heavy rain and mountain snow to much of the western US, despite the arrival of the dry season.
  2. Winter Storm Warnings are in effect for much of the Sierra Nevada mountain range, where over 1-2 feet of snow will be possible through Friday.
  3. Most of the activity will take place between now and Friday as rounds of rain showers, some of which will be heavy, move in from the ocean. These showers will dominate the coast and across the Northwest near the low pressure center. The Southwest should remain dry.
  4. Portions of the interior mountain region will also receive snowfall, but most of it will accumulate to less than 1 foot. That includes the Bitterroots and the northern and central Rocky Mountains.

Very-Welcome Warm and Dry Pattern Settles into East Coast:

ECMWF model forecasting building ridges over the eastern US through at least Memorial Day Weekend.
  1. Drier times are ahead for the East Coast, and are already being felt thanks to a recent pattern change. A trough, or dip in the jet stream, across the West has resulted in a building ridge across the East.
  2. This ridge of high pressure will develop through the weekend, allowing for dry and partly cloudy weather conditions for most areas while temperatures range from the 60s and 70s in much of the Northeast to the 80s and 90s across the Southeast.
  3. Early- to mid- next week will feature a weaker ridge, but should keep the Southeast dry for the most part. Meanwhile across the Northeast, we’ll have to watch for a front or two that may move through, sparking a few minor showers and thunderstorms.
  4. By the Memorial Day Weekend, however, signs continue to suggest a more-significant upper-level ridge developing across the eastern US, making for a sunny and hot weekend with widespread highs in the 70s, 80s, and 90s. This pattern is not set in stone yet, so stay tuned as the forecast certainty hopefully increases.

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Author

Jackson is Head of Content at WeatherOptics and produces several forecasts and manages all social media platforms. Previously, Jackson forecasted local weather for southwestern Connecticut, founding his website, Jackson's Weather, in the March of 2015. He is currently studying Meteorology and Broadcast Journalism at the University of Miami.

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