“Isaac” Headed to the East CoastSeptember 2nd, 2012 at 9:36 pm by T.J. Del Santo under General Talk, Tony's Pinpoint Weather Blog
….but in a much weakened form.
As of Sunday evening, the remnant moisture from Hurricane Isaac was spinning over the midwest. We are expecting this rain to work its way to the Eastern Seaboard, including Southern New England beginning on Tuesday.
In fact, some tropical downpours are possible late Monday night and early Tuesday morning. These downpours could linger into Thursday. If you’ve ever visited Florida and witnessed a tropical downpour, you know how sudden and quickly you can receive a large amount of rain. Localized street and poor drainage flooding could be possible with these storms. Rivers and streams will also need to be monitored, especially the smaller ones.
Here are the rainfall totals one computer model has indicated. Notice this is all rainfall from Tuesday through Wednesday evening. Notice the purples and blues through New England. That’s 1.25″ to 1.5″ of rain. That doesn’t seem too bad, but the computer guidance we use often underestimates tropical rainfall. Sometimes doubling the rainfall totals from such guidance is a more accurate approach. So….2.5″-3″ of rain during this time frame of Tuesday-Wednesday is more reasonable.
We won’t be seeing strong sustained winds from what is left of Isaac, but some locallized wind gusts from individual t’storms are possible.
Oh…and also note the low center on the bottom right corner of the image….that is Tropical Storm Leslie. She’s expected to move northward to near Bermuda with strengthening. Leslie is no threat to us, other than some possible increased wave action next weekend and next week.
Keep the umbrellas handy!!!