Post-Tropical Cyclone 09L (Isaias)…is located about 45 miles east-southeast of Montreal, Quebec, Canada – Last Advisory
According to the NHC Advisory 32, the post-tropical cyclone is moving toward the north-northeast near 38 mph (61 km/h), and this general motion is expected with a decrease in forward speed through Wednesday night.
Maximum sustained winds have decreased to near 45 mph (75 km/h) with higher gusts, mainly over water to the southeast of the center. Continued weakening is expected, and the winds are expected to drop below tropical-storm force during the next few hours.
The post-tropical cyclone is expected to dissipate over southeastern Canada Wednesday night or Thursday. Tropical-storm-force winds extend outward up to 175 miles (280 km) to the southeast of the the center. T
he NOAA automated station at Isle of Shoals, New Hampshire recently reported sustained winds of 46 mph (74 km/h) and a wind gust of 51 mph (81 km/h) at an elevation of 63 ft (19 m).
HAZARDS AFFECTING LAND
WIND: Tropical-storm conditions are expected for a few more hours in the tropical storm warning area in southern New England. These winds could cause significant tree damage and power outages.
Gale-force winds are possible over portions of southeastern Quebec for a few more hours.
RAINFALL: Rainfall accumulations of 1 to 3 inches are expected along and near the track of Isaias across Southern Quebec. Additional rainfall of up to an inch is possible across western and northern Maine overnight.
As the rainfall exits the United States, scattered minor to moderate and isolated major river flooding is ongoing or forecast across portions of the Mid-Atlantic with most rivers falling below flood stage Wednesday. Quick-responding rivers in the Northeast will also be susceptible to minor and possible moderate river flooding.
SURF: Swells generated by Isaias will affect the mid-Atlantic and Northeast coasts of the United States through tonight. These swells are likely to cause life-threatening surf and rip current conditions.
TORNADOES: A couple of tornadoes are possible across central and eastern Maine for the next several hours.
1.) Disorganized showers and thunderstorms continue in association with a trough of low pressure located a few hundred miles south-southwest of Bermuda. Although a weak area of low pressure could form during the next day or so, abundant dry air surrounding the system is likely to limit significant development. This system is forecast to move northwestward at about 10 mph over the southwestern Atlantic and then drift southwestward on Thursday.
Here’s what the computer models are showing
* Formation chance through 48 hours…low…20 percent
* Formation chance through 5 days…low…20 percent
Here’s a satellite image of the Atlantic Ocean
WSI satellite image of the Caribbean Sea
Latest satellite image of the Caribbean Sea and the Gulf of Mexico
Gulf of Mexico:
Latest satellite image of the Gulf of Mexico