A strong weather system will bring heavy snow, gusty winds - with blizzard conditions - to a broad area from the Great Basin to the Upper Midwest through Friday creating treacherous travel conditions. Also, strong winds and dry conditions are creating extreme wildfire threats in the southern Plains. Meanwhile, this system will bring a threat of severe thunderstorms to the Ohio Valley on Friday. Read More >
The National Weather Service is an agency under the National Oceanic and Atmospheric Administration, which is a part of the Department of Commerce. The mission of the National Weather Service is to provide weather forecasts and hazardous weather warnings to the public. We maintain a constant eye on the weather across the country 24 hours a day, 7 days a week, 365 days a year. A staff of over 4,500 skilled employees accomplish this mission with the assistance of high-speed computer networks, an orbiting fleet of weather satellites in space, and ground-based radar systems.
The San Juan forecast office is staffed 24 hours a day with at least one meteorologist and one hydro-meteorological technician. This office provides forecasts for users across Puerto Rico and the U.S. Virgin Islands. One of the major duties in this office is the coordination with the National Hurricane Center and dissemination of products, statements, watches and warnings during the Hurricane Season. Several times each day, forecasts are prepared in both English and Spanish for use by the general public, broadcast media, and the aviation industry.
The Staff consists of 10 meteorologists, 6 hydro-meteorological and/or meteorologist interns, 2 electronics technicians, an electronics systems analyst, an information technology officer, a service hydrologist, an assistant administrator, a data acquisition program manager, a warning coordination meteorologist, a science and operations officer and a meteorologist in charge.
The history of this NWS office dates back to the past century. Currently, our office is located in Carolina, Puerto Rico next to the San Juan/Luis Munoz Marin International Airport. Carolina is located on the Northern coast of Puerto Rico in the Caribbean. The U.S. Virgin Islands are Saint Croix, Saint Thomas, and Saint John, which are located about 50 miles east of Puerto Rico.
Starting in 2013, our office will issue approximately every 6 months a newsletter fill with interesting articles written by our staff!
Check the latest one here: The Whispering Trades
Our forecast area of responsibility includes all of Puerto Rico, Vieques, Culebra and the United States Virgin Islands (Saint Croix, Saint Thomas, Saint John and adjacent islands) divided in 15 zones and the coastal waters surrounding this area out to 20 nautical miles divided in 10 zones.
National Weather Service
San Juan, Staff
To contact any of the employees please send your email to the and your email will be forwarded to the appropriate person.
|Roberto Garcia||Meteorologist-in-Charge (MIC)|
|Ernesto Morales||Warning Coordination Meteorologist (WCM)|
|Ernesto Rodriguez||Science and Operations Officer (SOO)|
|Edward Tirado||Supervisory Information Technology Specialist (SITS/ESA)|
|Vacant||Service Hydrologist (SH)|
|Oswald Constable||Information Technology Officer (ITO)|
|Xiomara Cruz||Administrative Support Assistant (ASA)|
|Robert A. Mitchell|
National Weather Service
San Juan, Puerto Rico
The history of the National Weather Service in the Caribbean dates back to the 18th century when it became evident that hurricanes, which affected the Continental United States, had their origin in the Caribbean and the Tropical Atlantic.
Back in the 1870's, the U.S Government gave support for the collection and processing of meteorological data across the Caribbean Islands. The collection of this data across the Caribbean led to the first study of the San Felipe Hurricane of September 13, 1876. The U.S. Weather Bureau then published and disseminated this study throughout the United States, which led to an understanding of the hurricane vortex and its behavior. In May, 1899, the U.S. Weather Bureau established its Weather Office in Puerto Rico immediately upon taking command the island. That same year, a network of rain gauges was placed around the island and the collection and dissemination of daily weather observations began.
As the importance of commercial aviation grew and the demand for aviation weather services increased, the San Juan Weather Office was moved again in 1954, but this time to the new San Juan International Airport at Isla Verde (Carolina), where it remained in the main building until 1994.
In the 1990’s, Congress enacted the Modernization and Restructuring of the National Weather Service Act. The Act provided funding for facilities, new technology, and training. As a result, a new “Hurricane proof” building was constructed within the San Juan International Airport (now Luis Muñoz Marin International Airport) premises, which houses the new San Juan Weather Forecast Office of the National Weather Service. The relocation to the new building was completed in April, 1994.
In the late 1930's, with the advent of commercial radio, routine daily weather transmissions from the U.S. Weather Bureau were initiated via WKAQ, the first radio station established in Puerto Rico. It is worth noting that during Hurricane San Felipe II of September 13, 1928, the Weather Office used the radio to transmit a Hurricane Warning for the first time. In the late 1960’s through the 1980’s, the Weather Office used to provide daily lived broadcast over the government owned WIPR Radio Station.
The new NWS Office at the Luis Muñoz Marin International Airport
The Weather Forecast Office at San Juan, PR has transitioned into a modernized facility. Some of the largest modernization projects that the office has completed through the years have included the following:
Additionally, it is the only WFO in the National Weather Service that continuously provides bilingual English and Spanish services.
Special thanks to Dr. José Colón, former Meteorologist in Charge of the office from 1963 to 1986, for his assistance with this historical information.