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Center of Isaias Moving Through the New England States

| August 4, 2020 @ 8:19 pm

SUMMARY OF 800 PM EDT…2100 UTC…INFORMATION

LOCATION…43.6N 73.0W
ABOUT 5 MI…10 KM NNW OF RUTLAND VERMONT
MAXIMUM SUSTAINED WINDS…50 MPH…80 KM/H
PRESENT MOVEMENT…NNE OR 20 DEGREES AT 40 MPH…65 KM/H
MINIMUM CENTRAL PRESSURE…997 MB…29.44 INCHES


SUMMARY OF WATCHES AND WARNINGS IN EFFECT

A Tropical Storm Warning is in effect for…
* Watch Hill Rhode Island to Stonington Maine
* Martha’s Vineyard, Nantucket, and Block Island


DISCUSSION AND OUTLOOK

At 800 PM EDT (0000 UTC), the center of Tropical Storm Isaias was located by NOAA Doppler weather radars and surface observations near latitude 43.6 North, longitude 73.0 West. Isaias is moving toward the north-northeast near 40 mph (65 km/h), and this general motion is expected through tonight. On the forecast track, the center of Isaias will continue to move farther inland over eastern New York and Vermont this afternoon and evening, and over southern Canada tonight.

Data from Doppler weather radars along with surface observations indicate that maximum sustained winds have decreased to near 50 mph (80 km/h) with higher gusts. Continued weakening is expected this evening, and Isaias is forecast to become post-tropical tonight or early Wednesday.

Tropical-storm-force winds extend outward up to 205 miles (335 km) from the center. During the past few hours, there have been numerous reports of wind gusts of 40-50 mph (65-80 km/h) across portions of Rhode Island, eastern Massachusetts, and southeastern New Hampshire.

The estimated minimum central pressure based on surface observations is 997 MB (29.44 inches).


KEY MESSAGES

STORM SURGE: The combination of storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide…

Sandy Hook NJ to Martha’s Vineyard MA including Long Island Sound, Block Island Sound, Narragansett Bay, Buzzards Bay, and Vineyard Sound…1-2 ft

WIND: Widespread tropical-storm conditions are expected tonight in the tropical storm warning area in southern New England. These winds could cause significant tree damage and power outages. Gale-force winds are expected to spread into southeastern Quebec tonight and Wednesday.

RAINFALL: Rainfall accumulations of 1 to 3 inches are expected along and near the track of Isaias across northeast New York, northern Vermont, northern New Hampshire, and Southern Quebec. Heavy rainfall near the path of Isaias could result in flash flooding, particularly through urban areas and the surrounding terrain of the Adirondack and Green Mountain Ranges through tonight. Scattered minor to moderate and isolated major river flooding is ongoing or forecast across portions of the Mid-Atlantic. Quick-responding rivers in the Northeast will also be susceptible to minor and possible moderate river flooding.

TORNADOES: A couple of tornadoes are possible across southern New England through this evening.

SURF: Swells generated by Isaias will spread northward along 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.

All information from the National Hurricane Center’s 7:00 pm CDT Update.


Category: ALL POSTS, Severe Weather, Tropical

About the Author ()

Scott Martin is an operational meteorologist, professional graphic artist, musician, husband, and father. Not only is Scott a member of the National Weather Association, but he is also the Central Alabama Chapter of the NWA president. Scott is also the co-founder of Racecast Weather, which provides forecasts for many racing series across the USA. He also supplies forecasts for the BassMaster Elite Series events including the BassMaster Classic.

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