Debby Now Extratropical (Tropical Depression Strength) Races Through the Saint Lawrence River Valley Of Quebec

BULLETIN

Post-Tropical Cyclone Debby Advisory Number  31

NWS Weather Prediction Center College Park MD   AL042024

1100 PM EDT Fri Aug 09 2024

...AREAS OF HEAVY RAINFALL CONTINUE ACROSS PORTIONS OF NEW

ENGLAND AND SOUTHERN QUEBEC...

...IMPROVING CONDITIONS EXPECTED SATURDAY MORNING AS DEBBY MOVES

RAPIDLY TO THE NORTHEAST...

SUMMARY OF 1100 PM EDT...0300 UTC...INFORMATION

-----------------------------------------------

LOCATION...46.3N 71.1W

ABOUT 140 MI...225 KM ENE OF MONTREAL QUEBEC

ABOUT 160 MI...260 KM NE OF BURLINGTON VERMONT

MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H

PRESENT MOVEMENT...NE OR 55 DEGREES AT 39 MPH...63 KM/H

MINIMUM CENTRAL PRESSURE...996 MB...29.42 INCHES

WATCHES AND WARNINGS

--------------------

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Flood Watch is in effect for portions of...

* Northern New Hampshire

Coastal Flood Advisories and Warnings are in effect for portions

of...

* Coastal Mid-Atlantic

A Gale Warning is in effect for the coastal waters of...

* Northern Mid-Atlantic

* Southern New England

DISCUSSION AND OUTLOOK

----------------------

At 1100 PM EDT (0300 UTC), the center of Post-Tropical Cyclone Debby

was located near latitude 46.3 North, longitude 71.1 West. The

post-tropical cyclone is moving toward the northeast near 39 mph (63

km/h) and this motion is expected to continue.

Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.

Little change in strength is forecast during the next 48 hours.

The estimated minimum central pressure is 996 mb (29.42 inches).

HAZARDS AFFECTING LAND

----------------------

Key messages for Debby can be found in the Tropical Cyclone

Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC.

RAINFALL: Additional rainfall of 1 to 2 inches is possible across

portions of New England through early Saturday. This will result in

isolated to scattered instances of flash flooding.

Rainfall of 1 to 3 inches is possible across portions of

southern Quebec through early Saturday.

For a complete depiction of forecast rainfall and flash flooding

associated with  Debby, please see the National Weather Service

Storm Total Rainfall Graphic, available at

hurricanes.gov/graphics_at4.shtml?rainqpf and the Flash Flood Risk

graphic at hurricanes.gov/graphics_at4.shtml?ero.  For a list of

rainfall observations (and wind reports) associated this storm, see

the companion storm summary at WBCSCCNS4 with the WMO header ACUS44

KWBC or at the following link:

available at www.wpc.ncep.noaa.gov/discussions/nfdscc4.html

TORNADOES: A tornado or two may occur through this evening across

portions of New England.

SURF:  Large swells will continue to affect the coastal areas from

Long Island to New England. These conditions are likely to cause

life-threatening surf and rip current conditions.

Please consult products from your local weather office.

NEXT ADVISORY

-------------

This is the last public advisory issued by the Weather Prediction

Center on this system.

Forecaster Pereira/Chenard

10:50 PM ADT Friday 9 August 2024

Rain, at times heavy, is expected.

Locations: southern New Brunswick.

Total rainfall: 50 to 70 mm, with locally higher amounts possible.

Time span: this evening until Saturday morning.

Remarks: Thunderstorms may develop over some areas, producing locally heavier rainfall. Rainfall rates of 20mm/hr or more are possible.

If visibility is reduced while driving, turn on your lights and maintain a safe following distance.

Rainfall warnings are issued when significant rainfall is expected.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or tweet reports using #NBStorm.

In effect for:

Saint John and County

10:36 PM ADT Friday 9 August 2024

Rain, at times heavy, is expected.

Locations: northwestern New Brunswick.

Total rainfall: 40 to 60 mm, with locally higher amounts possible.

Time span: this evening until Saturday morning.

Remarks: Thunderstorms may develop over some areas, producing locally heavier rainfall. Rainfall rates are expected to be heaviest overnight tonight.

If visibility is reduced while driving, turn on your lights and maintain a safe following distance.

Rainfall warnings are issued when significant rainfall is expected.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or tweet reports using #NBStorm.

In effect for:

Edmundston and Madawaska County

Coastal Hazard Message

National Weather Service Caribou ME

943 PM EDT Fri Aug 9 2024

MEZ029-030-100945-

/O.CON.KCAR.SU.Y.0001.240810T0800Z-240810T1600Z/

Coastal Hancock-Coastal Washington-

943 PM EDT Fri Aug 9 2024

...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 4 AM TO NOON EDT

SATURDAY...

* WHAT....Breaking waves of 6 to 8 feet in the surf zone will

  make for hazardous surf conditions.

* WHERE...Coastal Hancock and Coastal Washington Counties.

* WHEN...From 4 AM to noon EDT Saturday.

* IMPACTS...Large waves can present a danger to people on rocks

  above the water. Stay away from rock outcrops along the

  shoreline exposed to ocean waves...as waves can easily sweep

  people into the cold ocean water.

* LOCATION...Acadia National Park...Schoodic Point...Lamoine

  State Park...Castine...Roque Bluffs State Park...Machias...

  Eastport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Surf Advisory Means That High Surf Will Affect Beaches In

The Advisory area...producing rip currents and localized beach

erosion.

&&

$$

Coastal Hazard Message

National Weather Service Gray ME

838 PM EDT Fri Aug 9 2024

MEZ023-024-NHZ014-100845-

/O.CON.KGYX.RP.S.0002.240810T1200Z-240811T0000Z/

Coastal York-Coastal Cumberland-Coastal Rockingham-

838 PM EDT Fri Aug 9 2024

...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM 8 AM EDT SATURDAY

THROUGH SATURDAY EVENING...

* WHAT...Dangerous rip currents expected.

* WHERE...In Maine, Coastal York and Coastal Cumberland

  Counties. In New Hampshire, Coastal Rockingham County.

* WHEN...From Saturday morning through Saturday evening.

* IMPACTS...Rip currents can sweep even the best swimmers away

  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and

float. Don`t swim against the current. If able, swim in a

direction following the shoreline. If unable to escape, face the

shore and call or wave for help.

&&

$$

Hazardous Weather Outlook

National Weather Service Caribou ME

441 PM EDT Fri Aug 9 2024

MEZ001>006-010-011-015>017-031-032-102045-

Northwest Aroostook-Northeast Aroostook-Northern Somerset-

Northern Piscataquis-Northern Penobscot-Southeast Aroostook-

Central Piscataquis-Central Penobscot-Southern Penobscot-

Interior Hancock-Central Washington-Southern Piscataquis-

Northern Washington-

441 PM EDT Fri Aug 9 2024

This Hazardous Weather Outlook is for Central Highlands Maine, Far

Eastern Maine, Far Northern Maine, Interior DownEast Maine, North

Woods Maine and Penobscot Valley Maine.

.DAY ONE...Tonight.

A frontal system combined with deep tropical moisture associated

with the remnants of Debby will bring showers and storms, some with

locally heavy rainfall, to the area late tonight. Winds gusting as

high as 30 to 40 mph could lead to isolated power outages.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather

conditions according to Standard Operating Procedures.

$$