A NEXRAD WSR-88D weather radar in Puerto Rico, the United States, operated by Federal Aviation Administration.
- Station
- San Juan (TJUA)
- Site
- Cayey
- Operator
- Federal Aviation Administration
- Network
- NEXRAD WSR-88D
- Antenna
- 18.116° N, 66.078° W, 2,844 ft (867 m) above sea level
- Products
- Reflectivity, composite reflectivity, echo tops, vertically integrated liquid, velocity, correlation coefficient, differential reflectivity, specific differential phase (KDP), spectrum width
TJUA is the San Juan WSR-88D weather radar. It stands on a ridge near Cayey in eastern Puerto Rico, about 39 km south of San Juan and 13 km from Caguas. It is one of the few NEXRAD radars owned by the Federal Aviation Administration rather than the National Weather Service; the NWS forecast office in San Juan is the responsible office and links to it as the TJUA NEXRAD at Cayey.
Hurricane Maria put the radar out of service in September 2017. NOAA and the Department of Defense flew in two short-range X-band radars, set up at Roosevelt Roads and Aguadilla, while the FAA radars were repaired. The site returned to full service in June 2018 with a stronger fiberglass radome and extra lightning protection.
Radar shows rain, snow and hail, not cloud, and nothing below its lowest beam; far from the antenna the beam passes high above the ground.