By Thursday, the main upper low will move through, pushing a colder air mass ahead as it does so. The best chance for thunderstorms looks like it will be during the day on Wednesday, as there will be some clearing behind the main front and a stronger vort max will move in from the west. The trough is slow moving, so showers will continue Tuesday into Wednesday. Monday night rain will spread across the forecast area as the cold front approaches from the west. The warming temperatures will continue through Monday, when temps will hit the low to mid 80s in the warm sector ahead of the next system. This will usher in a warmer, more humid air mass, so high temps on Sunday should be closer to average for this time of year. On Sunday, the axis of the upper level ridge will move eastward, bringing southwesterly flow aloft. The airmass will be dry, with light west to northwest flow, so fog is not expected Sunday night. Overnight temps on Saturday night will be quite cool, falling below 50 in the northern part of the forecast area. High pressure will remain over the area through Monday, bringing quiet weather through the short term. Short Term - Saturday Night Through Monday Night High temps Sat afternoon will be at or a little below seasonal norms. Sat will begin mostly cloudy across much of the FA, spcly N and E due to little downsloping with a llevel N wind, but increasing llevel subsidence ahead of the surface high advcg from QB prov will bring more in the way of sunshine for the FA durg the afternoon hrs. Patchy fog is possible ovrngt, spcly over Downeast areas, but uncertain how long it will last across the N with above blyr cool/dry advcn xpctd by this tm. Drier and cooler air will move into the NW by late tngt. Otherwise, showers will become scattered and end with the cold frontal passage ranging from erly eve across the far NW to daybreak ovr the far SE. Thunder potential will be greatest over the SW hlf of the FA where the lower atmos will be most unstable, but saying this, the chance of any tstm reaching svr lmts even over the far SW is considered low for this event. Previous discussion: Rn, shwrs, and possible isolated to scattered thunderstorms will cont into erly eve with sig rainfall over some areas. The cold front is currently a bit south of Millinocket and will push off the Downeast coast overnight. Made adjustments to lower the PoPs/Quantitative Precipitation Forecast for the remainder of tonight based on the latest radar returns across the FA as well as upstream of the region. this evening with only isolated to scattered showers remaining. The next cold front will begin to approach the region from the west late on Tuesday and cross the area by Wednesday.ĩ:07pm Update: The last of the lightning strikes were observed around 7 p.m. High pressure will cross the region through the weekend, then exit to the east Monday. Low pressure moving east across the Maritimes overnight will bring a cold front across the Gulf of Maine.
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