[Tropical] Public Tropical Cyclone Advisory

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WTNT34 KNHC 050550
TCPAT4

BULLETIN
Post-Tropical Cyclone Isaias Intermediate Advisory Number 32A
NWS National Hurricane Center Miami FL       AL092020
200 AM EDT Wed Aug 05 2020

...ISAIAS PRODUCING GUSTY WINDS AND HEAVY RAINFALL OVER
SOUTHEASTERN QUEBEC...


SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...46.1N 72.2W
ABOUT 70 MI...110 KM SW OF QUEBEC CITY
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NNE OR 20 DEGREES AT 35 MPH...56 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

The Tropical Storm Warning from Merrimack River Massachusetts to
Stonington Maine has been discontinued.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

There are no coastal watches or warnings in effect.

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 200 AM EDT (0600 UTC), the center of Post-Tropical Cyclone Isaias
was located near latitude 46.1 North, longitude 72.2 West. The
post-tropical cyclone is moving toward the north-northeast near 35
mph (56 km/h), and this general motion is expected with a decrease
in forward speed through tonight.

Maximum sustained winds have decreased to near 40 mph (65 km/h)
with higher gusts.  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 tonight or on Thursday.

Tropical-storm-force winds extend outward up to 90 miles (165 km)
to the northeast and east of the center.

The estimated minimum central pressure is 1000 mb (29.53 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:  Gale-force winds are possible over portions of southeastern
Quebec for a few more hours.  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 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 today.  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 this morning. 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 500 AM EDT.

$$
Forecaster Brown/Berg
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