#SevereStorms with nocturnal #tornado risk to blitz over a dozen states

Millions of people in the central and eastern #UnitedStates are bracing not only for severe storms and tornadoes but also weather whiplash with #temperatures plummeting as much as 60 degrees in less than 24 hours.

By Alex Sosnowski, AccuWeather senior meteorologist

Published Feb 26, 2024 12:07 PM EST | Updated Feb 26, 2024 3:32 PM EST

"A powerful cold front will mark an end to surging June-like warmth from the Mississippi Valley to the Appalachians at the cost of potentially violent storms that will roar through more than a dozen states from Tuesday afternoon to Wednesday, AccuWeather meteorologists warn.

"The upcoming severe weather eruption, which may affect as many as 50 million people, has been on AccuWeather's radar for at least a week due to a potent storm the team has been tracking since it began its journey well out over the Pacific Ocean. As that storm interacts with a strong jet stream, surging Gulf of Mexico moisture and an increasing temperature difference between unusual warmth and February cold, natural fireworks in the form of powerful thunderstorms will unfold.

"'The first thunderstorms will erupt along the edge of advancing warm air from mid- to late afternoon on Tuesday from northern Illinois and Indiana to southern Wisconsin and Michigan, as well as northwestern Ohio,' AccuWeather Meteorologist Alyssa Glenny said. These storms will become severe toward the end of the day.

"Next, thunderstorms will explode southwestward along the advancing cold front, extending from northern Illinois to Arkansas Tuesday evening. The front and the severe weather it packs will move across the Ohio and middle Mississippi valleys during the overnight hours on Tuesday.

"All modes of #SevereWeather are anticipated with the severe weather. Some of the storms will pack damaging #wind gusts, large #hail and torrential #downpours capable of leading to flash flooding. However, the potential for multiple #tornadoes is also a serious concern with the upcoming severe weather threat.

"'The greatest threat of tornadoes may occur along and in between interstates 70 and 80 in the Midwest, beginning in Illinois and western Indiana late in the day Tuesday and expanding eastward from there Tuesday night,' AccuWeather StormWarning Meteorologist Joseph Bauer said.

"The Tuesday evening and night tornado threat includes the massive #Chicago and SaintLouis metro areas and the cities of #Indianapolis, #SouthBend and #FortWayne, Indiana; #ToledoOhio and #LimaOhio; and #SpringfieldIllinois and #PeoriaIllinois.

"Should the severe thunderstorms organize into a single solid line on Tuesday night, the risk of damaging wind gusts may broaden, but the risk of highly dangerous tornadoes may lower. While a line of storms may form, it may be fragmented and individual discreet thunderstorms, which are most capable of producing tornadoes, may proceed the line.

"AccuWeather meteorologists urge people in the path of the storms to pay attention to severe weather bulletins, including signing up for alerts that may precede the messages when sleeping at night, such as the AccuWeather App.

"The risk of severe thunderstorms, including a few tornadoes, will carry over into Wednesday as the cold front advances to the east and south toward the central and southern #Appalachians. On Wednesday, the severe weather threat will extend from southern #NewYork state to the northern parts of #Mississippi, #Alabama and #Georgia.

"The potential for storms capable of causing property damage and localized power outages on Wednesday will include #NewYorkCity, #Philadephia, #WashingtonDC., #Charlotte and part of the #Atlanta metro area.

"As the powerful cold front presses on toward the mid-Atlantic coast, storms will bring brief downpours and strong wind gusts, as opposed to a tornado threat. In some cases, the squally storms may occur without thunder and lightning by the time the storms reach the coast, Bauer said.
Powerful cold front to mark as much as 60-degree temperature crash

"One of the reasons for the severe weather will be the rapid exchange of warm and cold air. Temperatures more typical of May and early June will precede the cold front, including unusual warmth at night into Tuesday in the Central states and into Wednesday along the Atlantic and Gulf coasts.

"Widespread highs in the 60s and 70s across the north and the 70s and 80s across the south are in store ahead of the front. Nighttime lows will be in the 40s and 50s across the north and the 50s and 60s across the south for the first part of this week.

"Temperatures will range from 15-30 degrees Fahrenheit above the historical average in many areas but may reach 40 degrees in some places through Tuesday in the central states and from Tuesday to Wednesday along the Atlantic and Gulf coasts.

"In the wake of the front, from Tuesday to Wednesday night, temperatures will crash 40 degrees over a broad area in a matter of hours.

"'For example, at Kansas City, Missouri, temperatures may drop about 60 degrees in 18 hours, which could set a record,' AccuWeather Meteorologist and Social Media Producer Jesse Ferrell stated. The existing record is 56 degrees, set on Jan. 15, 1953.

"In some cases, such as parts of the central Plains, the Upper Midwest, the Appalachians and New England, the blast of cold air will be so rapid as to catch up with the lingering moisture in the wake of the front. This temperature plunge will lead to pockets of accumulating# snow and/or a rapid #freezeup where moisture and slush can freeze into sheets of ice within an hour.

"The #FlashFreeze will spread eastward across the Upper #Midwest Tuesday night and from the central #Appalachians to #NewEngland Wednesday evening and night.

"In most cases along the mid-Atlantic and southern New England coasts, gusty winds will dry off roads and sidewalks Wednesday night, but there may be a few exceptions, and caution is advised."

https://www.accuweather.com/en/severe-weather/severe-storms-with-nocturnal-tornado-risk-to-blitz-over-a-dozen-states/1625378

#FlashFreeze, snow to shock millions following May-like warmth

As quickly as temperatures surge in the central and eastern #UnitedStates this week, they will crash so fast that snow will accumulate in some areas and wet areas may flash freeze in others.

By Alex Sosnowski, AccuWeather senior meteorologist

Published Feb 26, 2024 2:27 PM EST | Updated Feb 26, 2024 2:31 PM EST

"A temperature crash of 20, 40 and even 60 degrees Fahrenheit in a matter of hours may not only bring a cold shock to more than 100 million people from the #Midwest to the #Northeast but also a winter whiplash and hazardous flash freeze in some areas spanning Monday to Wednesday night, AccuWeather meteorologists caution.

"Shortly after surging to warmth more typical of May and early June, a blast of frigid air associated with a strong cold front and severe #thunderstorms will slash temperatures by leaps and bounds into midweek. Temperatures will nosedive by 20-40 degrees in cities such as Chicago, Pittsburgh, New York City, Nashville and Atlanta to name a few. However, in some places, such as Kansas City, Missouri, the rapid plunge may reach 60 degrees in less than 24 hours.

"Combining temperature, wind, precipitation and other factors, AccuWeather RealFeel® Temperatures may plummet 60-80 degrees.

"In #Chicago, following a high temperature of 75 degrees on Tuesday, temperatures may fail to climb back to the freezing mark on Wednesday afternoon following a plunge into the upper 20s Wednesday morning.

"This is about the biggest temperature drop you will ever see for the Mississippi Valley area, AccuWeather Meteorologist and Social Media Producer Jesse Ferrell said. Ferrell also pointed out that hundreds of daily highs and warm night records would be set last week.

"'In St. Louis, after a high in the mid-80s on Tuesday, temperatures will crash to 18 degrees by Wednesday morning, which is a drop of about 66 degrees,' Ferrell stated.

"In many cases, the gusty winds will allow paved surfaces to dry off after severe thunderstorms or downpours move through, but that will not be the case everywhere. There are some zones where a flash freeze may occur which would be a serious hazard for motorists and pedestrians.

"#Snow will be flying and accumulating from potions of the Colorado Rockies into Tuesday to the northern tier of Minnesota and Michigan into Tuesday night.

"In the Central states, several inches of snow will pile up over the Colorado Rockies, with 1-3 inches around Denver. Minneapolis will pick up a quick coating to an inch, but enough snow to shovel and plow will fall on International Falls, Minnesota.

"Farther to the east, in portions of the central and northern Appalachians to northern New England, the snow will be more spotty and generally limited to the higher terrain. However, as temperatures drop, roads may not have a chance to dry off in all areas before freezing air sets in.

"From late Wednesday to Wednesday night, motorists and pedestrians from Kentucky to upstate New York should closely monitor temperatures and be on the lookout for icy patches. Surfaces that appear to be wet may be icy, where the temperature has dropped to near or below the freezing mark.

"Along Interstate 80 in western Pennsylvania, following a high in the 60s on Wednesday morning, temperatures will plummet through the 30s and 20s during the evening with periods of snow and the potential for icy travel.

"Stiff winds and dry air should be enough to prevent widespread icy conditions from developing later Wednesday night along I-95 from #WashingtonDC, to #NewYorkCity and #Boston."

https://www.accuweather.com/en/winter-weather/flash-freeze-snow-to-shock-millions-following-may-like-warmth/1625556