By the calendar, we are now several days into astronomical spring. By the frigid weather, however, you’d never know it. The 4th nor'easter in the past 3 weeks is currently pulling away from the Eastern US coast, has brought heavy snow to much of the mid-Atlantic and Northeast. In its wake, atypically cold temperatures will persist, with high temperatures in the lower 40s °F and low temperatures in the 20s. The cold, winter-like weather that has dominated this month shows no signs of leaving anytime soon either. March is on pace to be colder (and snowier) than February, with a mean temperature so far of 35.6 °F (2.0 °C) compared to February’s warmest ever 38.1 °F (3.4°C). March was also warmer than February last year, but this feat had only occurred twice before in the 144-year meteorological record at Boston and is extremely rare for the Eastern US. Nevertheless, it is almost April. Spring is here - the days are getting longer, the sunshine stronger, and there’s only so long Old Man Winter can maintain an icy grip on the region.
Following yesterday’s brief excursion around 60°F, a weak cold front continues to progress eastward across the Northeast and will move offshore early tomorrow. In its wake, we will experience more seasonable weather with highs in the 40s, lows in the 30s, and no precipitation over the weekend and early into next week. No major weather systems are expected to impact the US before perhaps the middle of next week so enjoy the calm weather and cool, sunny start to December!
A weak low pressure system is currently exiting the East Coast; in its wake, cooler, more seasonable weather and sunny skies will dominate today and Friday. This brief return to autumn will be short lived, however, as the unseasonably warm temperatures the Northeast has experienced periodically over the past month will return for the weekend. On Saturday, high temperatures will surge back into the mid-70s with a chance of rain in advance of an approaching cold front. The front should pass through the area late Sunday; in its wake, autumn-like weather will return again, with highs in the 50s and 60s and lows in the 40s for at least the greater part of next week. Although local conditions have been calm, the weather has not been so tranquil across the rest of the United States.
Tranquil local weather will continue across the area as the late summer cool down slowly begins.
Irma is currently located just north of Hispaniola in the Caribbean. It is forecast to approach Florida on Sunday before making a sharp right turn to the north and potentially impacting Florida, Georgia, and/or the Carolinas.
Harvey unleashed over 25 trillion gallons of water on Texas and Louisiana; to understand just how much water this is, consider that if this volume was placed on MIT’s campus, it would extend about 140 kilometers into the sky.
Cloudy skies today will lead to rain chances tomorrow as a low pressure system pushes east towards the region. Unlike other recent rain events, this system will prove too weak to displace the cool air over the region. As a result, no significant warm up will occur prior to its passage. Cool air became firmly entrenched in the Northeast over the last several days as a backdoor cold front slid inland from the coast. This airmass will persist for quite some time, since no significant system is poised to push it out anytime soon. Thus, highs in the 50s fahrenheit and lows in the 40s can be expected for the next several days as Spring’s gradual warming trend is slowly realized.
Across the region, relatively mild conditions will persist, with partly cloudy skies and high temperatures in the mid to upper 40s through the weekend as high pressure settles across the region. This calm period will not last long, however, as a powerful storm system is forecast to develop across the deep south over the weekend and move toward the Northeast early next week. Across the west, heavy rain and snow continue to pound the region; only 65 percent of California remains in a drought, down from 100 percent just three months ago. Incredibly, only 2 percent remains in exceptional drought, down from 21 percent and 42 percent three months and one year ago respectively.
Clear skies and abundant sunshine will bring moderate temperatures and calm winds to the region through this weekend. High temperatures will remain slightly above normal in the upper 50s in advance of an incoming low pressure system from the west. That system will be this year’s first significant winter storm in the continental United States and is poised to bring heavy snowfall and possible blizzard conditions to much of the High Plains and Upper Mississippi Valley. In conjunction, a cold front will sweep across the central and eastern United States, bringing a chance of showers followed by much cooler weather to most locations.
An autumn front is poised to bring cooler temperatures and clear skies to New England this weekend. Following today’s clouds and showers, cold crisp air will be ushered into the region on strong gusting breezes from the north and northwest. The cooler weather will be accompanied by strong high pressure and light winds that could allow temperatures to drop near or into the 30s F on Friday and Saturday nights.
Cooler, seasonable conditions will overspread the region in the wake of Wednesday’s cold front. That front brought isolated but much-needed rain to Eastern Massachusetts, which remains in the midst of a persistent severe drought. Locally, clear skies and high temperatures in the mid 70s will persist into the weekend before another system approaches from the west by Sunday, bringing a cold front and another opportunity for precipitation. Near the Carolina coast, minimal Tropical Storm Julia will continue to meander, bringing squally weather and heavy rain to coastal regions. Julia is forecast to remain weak and nearly stationary over the next several days before weakening and moving onshore. Elsewhere in the nation, rain and thunderstorms will overspread the Plains as a developing system organizes over the central United States and progresses quickly eastward. Otherwise, calm weather and clear skies will be the norm across much of the country as the Autumnal Equinox approaches.
High pressure will slide across the region today and Wednesday in the wake of Monday’s recent snowstorm, bringing cold temperatures and breezy conditions to the region. The minimum temperature tonight will threaten the daily minimum temperature record of 20°F (-7°C) set in 1881, highlighting the unusual nature of such intense cold in Boston so far into April. As the high pressure system pulls away, temperatures will moderate and clear skies will give way to clouds and rain on Thursday as a cold front pushes into the region. In its wake, cooler temperatures and clearing skies will return and persist into the weekend as high pressure again settles into the region.