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.

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

...TROPICAL DEPRESSION FORMS OFF THE COAST OF EAST-CENTRAL
FLORIDA...
...TROPICAL STORM WATCH ISSUED FOR A PORTION OF THE NORTH CAROLINA
COAST...


SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...28.4N 78.6W
ABOUT 125 MI...200 KM E OF MELBOURNE FLORIDA
ABOUT 505 MI...810 KM SSW OF CAPE HATTERAS NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...NNE OR 20 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES


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

A TROPICAL STORM WATCH HAS BEEN ISSUED FOR THE NORTH CAROLINA COAST
FROM NORTH OF SURF CITY TO DUCK, INCLUDING PAMLICO AND
ALBEMARLE SOUNDS.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* NEW RIVER INLET 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.

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 500 PM EDT (2100 UTC), THE CENTER OF TROPICAL DEPRESSION ONE 
WAS LOCATED NEAR LATITUDE 28.4 NORTH, LONGITUDE 78.6 WEST. THE
DEPRESSION IS MOVING TOWARD THE NORTH-NORTHEAST NEAR 13 MPH (20
KM/H) AND THIS MOTION SHOULD CONTINUE DURING THE NEXT DAY OR SO.  
AFTER THAT TIME, A FASTER NORTHEASTWARD MOTION IS EXPECTED.  ON 
THE FORECAST TRACK, THE DEPRESSION IS EXPECTED TO MOVE OFFSHORE, 
BUT PARALLEL TO, THE COAST OF FLORIDA TONIGHT, 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 ESTIMATED MINIMUM CENTRAL PRESSURE BASED ON SURFACE OBSERVATIONS 
AND EARLIER AIRCRAFT RECONNAISSANCE DATA IS 1008 MB (29.77 INCHES).


HAZARDS AFFECTING LAND
----------------------
WIND:  TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH
AREA BY 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 INTERMEDIATE ADVISORY AT 800 PM EDT.
NEXT COMPLETE ADVISORY AT 1100 PM EDT.

$$
FORECASTER CANGIALOSI