A mix of sun and clouds, pleasant, highs in the low 80’s
Partly cloudy, comfortable, lows by morning in the mid 60’s
Mostly sunny, warmer, mid 80’s
Partly cloudy, mild, near 65
Partly sunny, more humid, chance for a couple of showers and possibly a thunderstorm, low-to-mid 80’s
Mostly cloudy, cooler-than-normal, chance for a couple of showers and possibly a thunderstorm, near 80
Mostly cloudy, still a bit cooler-than-normal, chance for showers and thunderstorms, low 80’s
Partly sunny, warmer, humid, chance for showers and thunderstorms, low-to-mid 80’s
Our spectacular late July weather continues today with low humidity values and although it will be a tad warmer than yesterday, temperatures will remain below normal for this time of year. High pressure in control of our weather will move off the Northeast US coastline by the end of the week and the return flow of air on its backside will promote increasing humidity in the area as an ocean flow of air develops.
Mainly sunny, pleasant, highs near 80 degrees
Partly cloudy, comfortable, lows by morning in the low-to-mid 60’s
Partly sunny, a bit warmer, but still comfortable, low 80’s
Partly cloudy, cool, mid 60’s
Mostly sunny, pleasantly warm, mid 80’s
Partly sunny, more humid, chance for a shower or thunderstorm, low 80’s
Mostly cloudy, cooler-than-normal, chance for showers and possibly a thunderstorm, near 80
Mostly cloudy, humid, chance for showers and possibly a thunderstorm, low 80’s
A strong cold front passed through the region yesterday paving the way for a stretch of very comfortable weather conditions. Temperatures today will have a hard time escaping the 70’s in much of the Mid-Atlantic region and the below-normal temperatures will continue through much of the week. Humidity levels will also be way down for the next couple of days, but will increase at the end of the week as an ocean flow develops.
Partly sunny, not as warm or as humid as yesterday, chance for an additional shower or thunderstorm this afternoon, highs in the low 80’s
Mostly cloudy, maybe a lingering evening shower, becoming more comfortable late, lows by morning in the lower 60’s
Mostly sunny, cool for this time of year, near 80
Mostly clear, quite cool, low 60’s
Mostly sunny, still very pleasant, near 80
Mostly sunny, nice, low 80’s
Partly sunny, comfortable, chance for a shower or thunderstorm, low 80’s
Mostly cloudy, still slightly below-normal temperatures, chance for a shower or thunderstorm, near 80
Powerful thunderstorms pounded the Mid-Atlantic region in the overnight hours ahead of an approaching cold front and that frontal system will works its way through the region later today. The frontal passage will usher in another spectacular air mass for this time of year with low humidity values and comfortable temperatures. The cooler air, anchored by strong Canadian high pressure and below-normal for this time of year, will become quite noticeable later tonight and it should stay quite comfortable for the next few days.
[GFS computer model forecast map at 300 mb for later tonight showing an impressive jet streak and upper level wave]
The combination of a vigorous upper level wave, impressive jet streak and developing low pressure will generate a wild scene tonight throughout the Mid-Atlantic region with numerous showers and thunderstorms from early evening through late tonight. Some of the thunderstorms will reach severe limits with torrential rainfall, damaging wind gusts, possible hail and even isolated tornadoes. The greatest chance for severe weather tonight will likely be from the eastern part of the Ohio Valley eastward to the Appalachian Mountains, but severe weather potential exists as well into the I-95 corridor from DC-to-Philly-to-New York City.
The timetable for the shower and thunderstorm threat is approximately from 8pm to 3am. All of this activity is associated with an usually strong and widespread cold air outbreak for this time of year that will bring spectacular weather to the Mid-Atlantic region from Tuesday through the rest of the week, but we may have to pay a price before we get there.