Apr 14, 2016 11:50 PM
NH1 Weather Insider with Joe Joyce: April 15, 2016
NH1 Chief Meteorologist
High pressure will be sitting right over the Northeast for the end of the week. This high is providing beautiful dry pleasant spring weather with highs in the 50's during the afternoon. A perfectly seasonal air mass. As the high shifts farther north into Canada it will begin to wrap in a cooler NE wind at the surface. Winds off the 41 degree water can make the coast line be quite a bit cooler, than from the milder temperatures inland. Everyone will bask in the sunshine, but the beaches will struggle to warm with highs remaining in the 40's and Lwr 50's, while inland highs will be in the 50's to near 60. The warmest spots will be in the western valleys, eventually climbing into the Lwr 60's Friday & Saturday...
Overall, there is more blocking in the atmosphere than we have seen in awhile. Sometimes, if you are on the more unfavorable side of the block, inclement unsettled weather can last for days. If you are lucky enough to be on the good side of the block, it will mean days of sunshine. That is exactly where we are heading! A huge upper level ridge will be building over the northeast as we approach the weekend. Warmer temperatures will gradually slide in into New Hampshire so by Sunday, highs will be climbing into the 60's to near 70. Still, winds will be light enough that winds will turn onshore with the heating of the day to cool the coast.
It appears Marathon Monday will be the warmest day of the stretch. Sunshine will hold on for a good portion of the day, along with a mild WSW wind. Temperatures should be able to climb to near 70-75 degrees during the afternoon. A little warm for the runners in the Marathon, but an absolute delight for the spectators! A cold front will arrive late in the day into the evening which will come with clouds and a shower.
Behind this front we can expect breezy and cooler weather to push into place Tuesday into Wednesday with a mix of sun and building clouds and the risk of a few spot shower with a trough in place across the Northeast for the midweek. This cooler air aloft will help to destabilize the air with the heating of the day. Building afternoon clouds will be possible both Tues and Wed.
The cooler air will be quickly lifting out by Thursday with temps right back to near 70. A flattening of the flow will take over and much warmer air will begin to invade the nation. Temperatures will average above normal for most of the United States and warmer mild Pacific air will be able to cross the country. The end of April from the 21st through the 28th looks like will have plenty of warmth along with it. So the Spring is definitely here to stay this time! There is no looking back! Forward!