Jun 25, 2015 9:09 PM
NH1 Weather Insider: When It Rains, It Pours
NH1 Chief Meteorologist - NH1.com
The latest US drought monitor issued on June 23rd still has Southern New Hampshire in a moderate drought. The good news is we have more rain ahead to help chip away at that issue. The bad news is it will be happening over the course of the weekend. Friday will start off with clouds and maybe even a brief early shower. A weak low on a stalled front well south of New England will be there early in the day. As the low pulls away, clouds will begin to break for a mix of sun and clouds by the afternoon with building high pressure from the west. Winds will be from the NE wind direction, so a slightly cooler feel will begin to settle in...especially for the coast. Away from the cool onshore winds, highs will be in the Lwr-mid 70's inland. At the coast, high temperatures will hold in the 60's all day. High pressure will sit over us Friday night with clear skies and pleasant weather. We will even have another chance to view the Northern Light Friday night as more super charged particles from the sun have recently slammed into our magnetosphere....and well you get the point. If you can, get away from the light pollution, look north Friday Night....It will be a beautiful night on the Lake.
Now the weekend. So much depends on good weather during these summer weekends. It pains me to put rain in the forecast. I am afraid this time I have no choice. The good news it won't be raining the whole time. Let's just get down to the dirty facts. High pressure off the coast will give us a bright start to the weekend Saturday. Saturday morning will be the best part of the weekend. Clouds will quickly spread from west to east, with skies becoming cloudy by afternoon ahead of the approaching rain.
As our upper level winds dig a deep trough into the northeast, a stronger low will develop on this stalled front over the Ohio valley and track into Pennsylvania Late Saturday. While most of Saturday will remain dry, and even a bit cool with an ESE wind at the surface, there is a risk for even some late day showers to arrive a bit ahead of schedule. With cloudy skies and onshore winds, expect highs in the 60's and Lwr 70's inland. Another cool day at the beach. Rain will quickly be spreading into New England Saturday night with a very good potential of heavy downpours which will last right through early Sunday morning.
The Low will track right towards New England, but the exact track will be big in terms of the overall set up of Sunday...and it's misery index. The Heaviest rain on Sunday will come before 9 AM. Showers will be taper off to clouds and drizzle by the afternoon. If the low tracks into Vermont...a drier an milder afternoon can be expected...still in the 60's. If the low tracks along the south coast, East winds will remain locked in place all day Sunday with a cooler, raw feel, and better chance for lingering showers and drizzle into the afternoon. very close call.
We will also have to watch out for a core of wind which could be directed into the coast with SE/NE winds Saturday Night inot Sunday Morning as this low approaches. The combination of the departing high, with approaching low could make for a windswept rain early Sunday morning with gusts over 30 mph at the coast....again track dependent.
This low will lift out with drying WSW winds Sunday Night, with a building upper level ridge on the east coast which will bring in a drier and warmer start to the week. A cold front will late Tuesday and early Wednesday for a period of clouds and scattered showers, with more seasonal air and a more summery feel returning for next week.
Stay tuned to NH1.com and NH1 News this weekend for further updates. If you are planning on camping this weekend, be prepared for this heavy rain and plan accordingly. Water proof clothing and extra supplies may be needed. This rain will not be fun as it moves through.