The storm system that has been discussed for the past few days is well underway across the region this afternoon. One big change from this morning is that due to more moisture than expected being advected into the region as well as a slightly slower than anticipated forward motion of the front, rainfall amounts have been increased to widespread 2-3″ with isolated 4″ possible. With the increase in expected rainfall, flooding will also be more of an issue than anticipated. For this reason, the NWS has issued a flash flood watch for the GYX CFO (Southern Maine and most of NH). Flash flood warnings are also up for parts of NH.
Watches and warnings from GYX as of 4:45PM Latest: http://www.weather.gov/gyx/
Watches and warnings from BOX as of 4:45PM Latest info: http://www.weather.gov/box/
Radar as of 4:45PM. Eastward progression of rain has been behind schedule on both ends (onset and finish) and combined with slightly more moisture than anticipated, 2-3″ of rain is expected vs this morning’s 1-2″ forecast.