Remnants Of Hurricane Zeta (Cat 2) Could Bring Snow To Nova Scotia Update One

000

WTNT43 KNHC 292037

TCDAT3

Post-Tropical Cyclone Zeta Discussion Number  21

NWS National Hurricane Center Miami FL       AL282020

500 PM EDT Thu Oct 29 2020

Zeta lost tropical characteristics and was declared post-tropical a

few hours ago.  The surface pressure field has become elongated

with the center now embedded within a frontal zone over the

Mid-Atlantic states.  The maximum sustained winds are still

estimated to be 45 kt, based on an observation received from

northeastern North Carolina a few hours ago, and winds have been

increasing at marine sites located just off the Mid-Atlantic coast.

Zeta is zooming toward the east-northeast (060/48 kt), and its

center is just about to move off the Delmarva Peninsula over the

western Atlantic waters.  This motion should continue for the next

day or so since Zeta is embedded within fast westerly flow ahead of

a strong mid-level trough.

Some baroclinic re-intensification is expected over the next day or

so while Zeta moves farther out over the western Atlantic, and the

12-hour forecast intensity is based on the GFS and ECMWF global

models.  Zeta's center is expected to dissipate within the frontal

zone by 24 hours, with another strong low pressure area likely to

develop and move toward the north Atlantic over the next several

days.  The forecast wind radii are based on guidance from the

Ocean Prediction Center.

This is the last advisory issued on Zeta.  Additional information

on this system can be found in High Seas Forecasts issued by the

National Weather Service, under AWIPS header NFDHSFAT1, WMO header

FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php

KEY MESSAGES:

1.  Strong wind gusts are still possible over portions of extreme

eastern North Carolina, southeastern Virginia, and the southern

Delmarva Peninsula during the next couple of hours.

2.  Through this evening, the last of the heavy rainfall along the 

track of Zeta is expected over the Mid-Atlantic. This rainfall may 

lead to flash, urban, small stream, and isolated minor river 

flooding. 

FORECAST POSITIONS AND MAX WINDS

INIT  29/2100Z 38.8N  75.3W   45 KT  50 MPH...POST-TROP/EXTRATROP

 12H  30/0600Z 41.0N  66.1W   50 KT  60 MPH...POST-TROP/EXTRATROP

 24H  30/1800Z...DISSIPATED

$$

Forecaster Berg