Thursday, July 14, 2011

    Surface high pressure maintains a steady hold on the eastern US today & tonight. Forecast will stay dry with cooler temps & less humidity tonight into Friday. High pressure will slide east, allowing for more moisture to return late Friday. Forecast turns warmer & more humid with slight chance for a shower/thunderstorm for the weekend. Hot & humid with pop up storms next week.

    Just a few high cirrus clouds draped acoss the northern zones today. Otherwise, lots of sunshine, mild temps & less humidity in store today, all thanks to surface high pressure. We can open the windows & give the AC a rest tonight. Forecast will stay mild & calm. Lows will be in the upper 50s/low 60s.

    Heavy tropical air with higher moisture content will lift north into our area late Friday. More humidity & warmer daytime temps are on tap for the weekend & next week. As that moist Gulf air mass lifts north, a few afternoon & evening storms could develop. So we have to keep a slight chance for precip from south to north late Saturday into Sunday as that tropical air inundates the Appalachians. Meanwhile. upper level ridging & dry air aloft may keep our forecast dry enough to forego any widespread precip until late Sunday. So we have a sun/cloud mix & a green light for outdoor activities this weekend. Just throw an umbrella or light rain jacket in with your gear, especially futher south where convective storms are more likely to fire. Temperatures this weekend will range from the mid 60s to the mid/upper 80s.

    Hot tropical air mass parked over the Midwest will move east, into our area as we start next week. We'll switch on the AC again as the heat index reaches the mid/upper 90s. Dew points will reach the upper 60s & 70s. Daytime highs will hit the mid 90s by Wednesday. Overnight lows will struggle to get below 70. A few energy pulses could trigger a few afternoon/evening storms Tuesday. Forecast stay very hot and humid with afternoon & evening storms possible through much of the second half of next week. High precipital water values & tropical nature of next week's air mass could bring chance for locally heavy downpours next week. Will report on this later!

850mb image courtesy of Unysis Weather depcits hot cT air mass spreading into the east timed for Tuesday, next week!