Today will feature a mix of sun and clouds with coastal areas seeing the most sun and the mountains likely remaining overcast for much of the area. The cold front struggling to motivate to make its way over in our direction yesterday is still trying, albeit not that hard, to make it to the coast. Despite its laziness, its goal will be achieved in the early evening tonight with a line of showers and possibly a rumble of thunder accompanying it. The showers will be brief and will arrive between 2 and 4 PM along the coastal plain. The mountains will be closer to the front this morning and thus will have off and on showers all day.
Here’s one depiction of the line of showers with an isolated rumble (pink) according to the Swiss model. If you’re interested, feel free to check out some of the other Swiss model data here https://kachelmannwetter.com/de/modellkarten/newengland/new-hampshire/significant-weather/20170412-1800z.html
We’re entering into a pattern of oscillating temperatures with a ~3 day return period. We’ve had 3 days of warm weather (Sunday, Monday, Tuesday) and now we’re about to have 3 days of cooler weather (Wednesday, Thursday, Friday) before another ~3 day warm stretch (Saturday, Sunday, maybe Monday). Expect the 3 day rule to continue to hold fairly true as we head into the second half of April with the balance of warm/cool slowly shifting in favor of the warmth as we get towards May.