Post by Ravenchamp on Mar 27, 2015 12:25:24 GMT -5
Mid-April Pattern Change May Yield Rain for California, Erase Persistent Chill in Northeast
A significant change in the weather pattern is anticipated for much of the United States during the middle of April.
The pattern change could erase the persistent chill in the Northeast. The number of days with near- to above-average warmth could outnumber the chillier-than-average days in much of the mid-Atlantic, central Appalachians and the Ohio Valley.
"As we get farther along into April, the chances of a rapid meltdown increase following any big snowstorm, and there seems to be that risk in northern New England and upstate New York," Noll said.
Several indicators are suggesting that the jet stream will shift position from its persistent or re-occurring southward plunge in the East.
"A northward bulge in the jet stream is likely to develop in the East with a southward dip in the west about a week or so into April," Noll said.
The jet stream is a high-speed river of air high above the ground that separates cold air to the north from warm air to the south. This change in the jet stream position will set the pattern change into motion.
According to AccuWeather.com Meteorologist Mark Paquette, "We expect an area of high pressure over the western part of the Atlantic to get stronger and create a south to southwest flow of warm air in the East."
"Lengthening daylight will erode the cold air over central Canada, which has been a stubborn source region for the chill in the Northeast," Paquette said.
www.accuweather.com/en/weather-news/mid-april-weather-pattern-change-milder-northeast-california-rain/44615205
A significant change in the weather pattern is anticipated for much of the United States during the middle of April.
The pattern change could erase the persistent chill in the Northeast. The number of days with near- to above-average warmth could outnumber the chillier-than-average days in much of the mid-Atlantic, central Appalachians and the Ohio Valley.
"As we get farther along into April, the chances of a rapid meltdown increase following any big snowstorm, and there seems to be that risk in northern New England and upstate New York," Noll said.
Several indicators are suggesting that the jet stream will shift position from its persistent or re-occurring southward plunge in the East.
"A northward bulge in the jet stream is likely to develop in the East with a southward dip in the west about a week or so into April," Noll said.
The jet stream is a high-speed river of air high above the ground that separates cold air to the north from warm air to the south. This change in the jet stream position will set the pattern change into motion.
According to AccuWeather.com Meteorologist Mark Paquette, "We expect an area of high pressure over the western part of the Atlantic to get stronger and create a south to southwest flow of warm air in the East."
"Lengthening daylight will erode the cold air over central Canada, which has been a stubborn source region for the chill in the Northeast," Paquette said.
www.accuweather.com/en/weather-news/mid-april-weather-pattern-change-milder-northeast-california-rain/44615205
