Kinda Like Florida
Posted by Pete Bouchard
Some real gullywashers out there this afternoon. One storm put down .20" in 5 minutes in Hingham - testament to the thick, tropical air wafting overhead.
Like an efficient machine, t-storms can hoist all that humid air high into the sky and wring it out over us. Right now, the amount of water over us would equate to about 2", so if the conditions were right, a storm could produce up to 2" of rain in a short amount of time. Of course, this depends on the speed of the storm, and if it's crawling along you could get more, but if it's moving swiftly, you get less.
Nevertheless, the potential is there for a lot of water in the coming days. Multiple storms, a low pressure system to focus it, and a very humid airmass all spell trouble:
That Flash Flood Watch goes right until 6pm Friday, but the most intense storms/rain will end much sooner than that. The "rainy window" opens tomorrow afternoon and carries right through Friday morning. Drive safe, and take it slow in those downpours!
The weekend isn't looking all that bad...but it's not rain-free either. Storms/downpours will cross each afternoon in the soupy air. Again, there might be some brief, localized flooding, so keep an eye to the sky.
Long range: more of the same. We're in it for a while folks...hunker down.