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Tropical Storm Isaias Public Advisory Number 31A

2020-08-05 01:50:16| National Hurricane Center (Atlantic)

Issued at 800 PM EDT Tue Aug 04 2020 000 WTNT34 KNHC 042350 TCPAT4 BULLETIN Tropical Storm Isaias Intermediate Advisory Number 31A NWS National Hurricane Center Miami FL AL092020 800 PM EDT Tue Aug 04 2020 ...CENTER OF ISAIAS NOW MOVING THROUGH THE NEW ENGLAND STATES... SUMMARY OF 800 PM EDT...0000 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 WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning has been discontinued west of Watch Hill, Rhode Island, including Long Island and Long Island Sound. 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 A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 6 to 12 hours. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. 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). HAZARDS AFFECTING LAND ---------------------- Key messages for Isaias can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. 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. See products issued by Environment Canada for more information. 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. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 PM EDT. $$ Forecaster Beven

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