Severe Weather Risks Late Today
Fiona Passes East Late Week As Very Cool Air Arrives
A new week begins with the last days of summer dwindling down to a precious few. We are going to have a very warm and more humid Monday with partly sunny skies. Temperatures this afternoon will reach the low and middle 80s. Late today an upper trough and cold front will approach and that could set off some scattered thunderstorms. The Storm Prediction Center indicates a marginal risk for severe weather with the chance for isolated severe thunderstorms.
Once the front passes offshore we will see a shot of slightly cooler air mass with low humidity. Skies should clear late tonight. Tuesday will be a partly to mostly sunny day with lower humidity and highs reaching the upper 70s and lower 80s.
Wednesday will be the warmest day of this week and we will turn more humid again. There is a second stronger cold front that will be coming through Wednesday and this will bring the chance for showers and thunderstorms Wednesday evening into the night. Temperatures Wednesday will top in the middle 80s in many areas.
This is the last warm day as this cold front marks the leading edge of a rather impressive cool air mass driving southward out of Canada. The cold front will also function as an alley way for Hurricane Fiona to track along it. This will take Fiona on a course where we could see a very close pass to Bermuda, followed by a track quickly northward toward Newfoundland.
This set up is one where temperatures will be below average beginning late Thursday and probably lasting into much of next week. Thursday will be a breezy day with clouds and some sunshine. Highs will be in the 70s and then we will head down to the low 50s by Friday morning near the coast and warmer urban settings and 40s inland.
The coolest of the cool air will be with us Friday with a gusty wind and sunshine but it will be ineffective sunshine for the first day of Autumn. Highs right now are forecast to be in the mid to upper 60S in most places with lower temperatuers north and west but I think these forecast high temperatures for Friday are too high.
The weekend looks to be dry Saturday and mostly dry Sunday but another cold front arrives with showers late Sunday or Sunday night into Monday morning and this will be followed by another rather impressive shot of cool air for this time of year early next week.
HURRICANE FIONA DEVESTATING RAINS PUERTO RICO,
HURRICANE CONDITIONS DOMINCAN REPUBLIC
Slow moving Hurricane Fiona is threading the needle between Puerto Rico & the Domincan Republic by moving through the Mona Passage. Heavy rains continue for a third day in Puerto Rico with rainfall amounts exceeded 20 inches in many areas with more to come. Meanwhile the east coast of the Dominican Republic is see hurricane conditions with wind and rain. Highest winds are 90 mph. The forecast track moves Fiona slowly northward today and Tuesday and then accelerating northeastward. It is forecast to become at least a category 3 hurricane as it approaches Bermuda Thursday, followed by a threat to Newfoundland Friday night into Saturday morning. Other than roughing up the ocean later this week, Fiona is not going to have much direct impact to the weather along the East Coast though it is part of the mechanism that is going to change the pattern to a much cooler one late week and into next week.
MANY THANKS TO TROPICAL TIDBITS & F5 WEATHER FOR THE USE OF MAPS
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