MIAMI (AP) - The first tropical depression of the Atlantic 2010 hurricane season has formed in the Western Caribbean, but it is unclear if it will pass over the massive oil spill in the Gulf of Mexico.

Forecasters at the National Hurricane Center in Miami said Friday that the depression has winds of about 35 mph (55 kph).

A tropical storm warning is in effect for the east coast of the Yucatan Peninsula. The peninsula separates the Caribbean Sea from the Gulf of Mexico.

The warning is in effect in Mexico from Chetumal north to Cancun. The depression is on track to reach the peninsula by late Saturday.

It is about 345 miles (555 km) east-southeast of Chemtumal. In the Gulf, the spill has been put at somewhere between 69 million and 132 million gallons in the water.

Here's the official advisory from the National Weather Service:

BULLETIN

TROPICAL DEPRESSION ONE SPECIAL ADVISORY NUMBER 1

NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL012010

600 PM EDT FRI JUN 25 2010

...FIRST TROPICAL DEPRESSION OF THE ATLANTIC SEASON FORMS IN THE

WESTERN CARIBBEAN...

SUMMARY OF 600 PM EDT...2200 UTC...INFORMATION

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

LOCATION...16.5N 83.5W

ABOUT 355 MI...570 KM SE OF COZUMEL MEXICO

ABOUT 345 MI...555 KM ESE OF CHETUMAL MEXICO

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

PRESENT MOVEMENT...WNW OR 300 DEGREES AT 10 MPH...17 KM/HR

MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES

WATCHES AND WARNINGS

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

CHANGES WITH THIS ADVISORY...

THE GOVERNMENT OF MEXICO HAS ISSUED A TROPICAL STORM WARNING FOR THE

EAST COAST OF THE YUCATAN PENINSULA FROM CHETUMAL NORTHWARD TO

CANCUN.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WARNING IS IN EFFECT FOR...

* THE EAST COAST OF THE YUCATAN PENINSULA FROM CHETUMAL NORTHWARD TO

CANCUN

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE

EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR

PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.

DISCUSSION AND 48-HOUR OUTLOOK

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

AT 600 PM EDT...2200 UTC...THE CENTER OF NEWLY FORMED TROPICAL

DEPRESSION ONE WAS LOCATED NEAR LATITUDE 16.5 NORTH...LONGITUDE

83.5 WEST. THE DEPRESSION IS MOVING TOWARD THE WEST-NORTHWEST NEAR

10 MPH...17 KM/HR. THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR

THE NEXT COUPLE OF DAYS. ON THE FORECAST TRACK...THE DEPRESSION

WILL REACH THE YUCATAN PENINSULA BY LATE SATURDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH...55 KM/HR...WITH HIGHER

GUSTS. SOME STRENGTHENING IS FORECAST...AND THE DEPRESSION IS

EXPECTED TO BECOME A TROPICAL STORM TONIGHT OR SATURDAY.

THE MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE

HURRICANE HUNTER AIRCRAFT WAS 1004 MB...29.65 INCHES.

HAZARDS AFFECTING LAND

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

WIND...TROPICAL STORM FORCE WINDS ARE EXPECTED TO REACH THE COAST

WITHIN THE WARNING AREA BY SATURDAY AFTERNOON.

RAINFALL...THE DEPRESSION IS EXPECTED TO PRODUCE TOTAL RAIN

ACCUMULATIONS OF 4 TO 8 INCHES OVER THE YUCATAN PENINSULA...EASTERN

GUATEMALA...AND MUCH OF HONDURAS AND BELIZE THROUGH SUNDAY MORNING.

ISOLATED MAXIMUM AMOUNTS OF 15 INCHES ARE POSSIBLE OVER MOUNTAINOUS

AREAS. THERE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND

MUDSLIDES.

NEXT ADVISORY

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

NEXT INTERMEDIATE ADVISORY...800 PM EDT.

NEXT COMPLETE ADVISORY...1100 PM EDT.

$$

FORECASTER AVILA/BRENNAN