Tropical Depression One forms off the Florida Atlantic Coast

Weather

The first tropical cyclone of the 2020 Atlantic Hurricane Season formed Saturday afternoon off the southeastern coast of Florida.

Known as Tropical Depression One, this system is expected to strengthen over the next several hours and potentially become the first named storm of the season.

A system is labeled as a “tropical depression” when a closed area of circulation is detected, but maximum sustained wind gusts are below 39 mph. Once it meets that threshold, it is classified as a tropical storm and it receives a name. At that point, this tropical system would be called “Arthur”.

Below is additional information from the National Hurricane Center.

WTNT31 KNHC 162352
TCPAT1

BULLETIN
TROPICAL DEPRESSION ONE INTERMEDIATE ADVISORY NUMBER 1A
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL012020
800 PM EDT SAT MAY 16 2020

...RECONNAISSANCE AIRCRAFT FINDS THE DEPRESSION A LITTLE BETTER
ORGANIZED...
...A TROPICAL STORM WATCH REMAINS IN EFFECT FOR PORTIONS OF THE
NORTH CAROLINA COAST...


SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...28.9N 77.9W
ABOUT 175 MI...280 KM ENE OF MELBOURNE FLORIDA
ABOUT 460 MI...735 KM SSW OF CAPE HATTERAS NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...NE OR 40 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES


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

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* SURF CITY TO DUCK NC
* PAMLICO AND ALBEMARLE SOUNDS

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA, GENERALLY WITHIN 48 HOURS.

A TROPICAL STORM WARNING COULD BE REQUIRED FOR PORTIONS OF THE
WATCH AREA BY SUNDAY MORNING.

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 DEPRESSION ONE WAS
LOCATED BY AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT NEAR 
LATITUDE 28.9 NORTH, LONGITUDE 77.9 WEST. THE DEPRESSION IS MOVING 
TOWARD THE NORTHEAST NEAR 14 MPH (22 KM/H). A MOTION TOWARD THE 
NORTHEAST OR NORTH-NORTHEAST IS EXPECTED TONIGHT INTO SUNDAY 
MORNING. AFTER THAT TIME, A FASTER NORTHEASTWARD MOTION IS 
EXPECTED. ON THE FORECAST TRACK, THE DEPRESSION IS EXPECTED TO 
REMAIN WELL OFFSHORE THE EAST COAST OF FLORIDA AND GEORGIA TONIGHT 
AND SUNDAY, AND THEN MOVE NEAR OR EAST OF THE COAST OF NORTH 
CAROLINA ON MONDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH (55 KM/H) WITH HIGHER
GUSTS. GRADUAL STRENGTHENING IS FORECAST, AND THE DEPRESSION IS
EXPECTED TO BECOME A TROPICAL STORM ON SUNDAY.

THE MINIMUM CENTRAL PRESSURE RECENTLY MEASURED BY A RECONNAISSANCE
AIRCRAFT WAS 1006 MB (29.71 INCHES).


HAZARDS AFFECTING LAND
----------------------
WIND:  TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH
AREA ON MONDAY.

RAINFALL: THE DEPRESSION IS EXPECTED TO PRODUCE ADDITIONAL RAIN
ACCUMULATIONS OF 1 TO 2 INCHES OVER THE CENTRAL AND NORTHWEST
BAHAMAS, AND GENERALLY LESS THAN 1 INCH OVER SOUTH FLORIDA THROUGH
TONIGHT.  THE DEPRESSION IS ALSO EXPECTED TO PRODUCE TOTAL RAIN
ACCUMULATIONS OF 1 TO 2 INCHES OVER COASTAL NORTH CAROLINA SUNDAY
NIGHT AND MONDAY.

SURF:  SWELLS GENERATED BY THE DEPRESSION ARE AFFECTING PORTIONS OF
THE EAST COAST OF CENTRAL AND NORTHERN FLORIDA.  THESE SWELLS ARE
EXPECTED TO SPREAD NORTHWARD DURING THE NEXT FEW DAYS, AND COULD
CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS ACROSS MUCH
OF THE U.S. SOUTHEAST AND MID-ATLANTIC COASTS.  PLEASE CONSULT
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 1100 PM EDT.

$$
FORECASTER STEWART

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