TJUA radar — Puerto Rico, PR
TJUA is the National Weather Service's WSR-88D Doppler radar for the Puerto Rico area, operated with the NWS office SJU. View it live in TALON — the loop, super-res reflectivity, storm-relative velocity, rotation and correlation coefficient.
| Station | TJUA (Puerto Rico, Puerto Rico) |
|---|---|
| Location | 18.1000°, -66.0700° · Guayama County |
| Elevation | 2,795 ft above sea level |
| Type | WSR-88D (NEXRAD) S-band dual-polarization Doppler radar |
| Products in TALON | Super-res reflectivity (0.25 km), velocity, storm-relative velocity, rotation (azimuthal shear), correlation coefficient PRO |
How high can TJUA see?
A radar beam travels in a nearly straight line while the Earth curves away underneath it, so the farther a storm is from TJUA, the higher above the ground the radar is looking. Tornadoes start in the lowest few thousand feet, so storms close to the radar show low-level rotation much better.
| Distance from TJUA | Lowest scan (0.5°) | Next scan (1.5°) |
|---|---|---|
| 10 mi | 500 ft | 1,400 ft |
| 25 mi | 1,500 ft | 3,800 ft |
| 50 mi | 3,600 ft | 8,200 ft |
| 75 mi | 6,300 ft | 13,200 ft |
| 100 mi | 9,600 ft | 18,800 ft |
| 150 mi | 18,200 ft | 32,000 ft |
Height of the beam's center above the radar, using standard refraction. Terrain can raise or block the beam.
Severe weather inside TJUA's range
Since 1950, NOAA has recorded 15 tornadoes within 60 miles of the TJUA radar, all of them weak (EF0–EF1). They have been most common in May and September. The strongest was an F1 on May 5, 1969, which touched down about 14 miles north of the radar. The most recent was an EF0 on May 2, 2024, which touched down about 49 miles west-northwest of the radar.
Hail: 7 reports of hail 1 inch or larger within 60 miles of the TJUA radar since 1955, 1 of them 2 inches or larger. The largest was 2.00-inch hail (hen egg size) on May 29, 1997.
| Tornadoes since 1950 | 15 |
| EF2/F2 or stronger | 0 |
| Strongest tornado | F1 · May 1969 |
| Busiest tornado month | May |
| Largest hail | 2.00 in · May 1997 |
Source: NOAA Storm Prediction Center severe weather database — tornadoes 1950–2025, hail 1955–2025 (the latest year is preliminary). Distances are to each tornado's recorded track; ratings before February 2007 use the original Fujita (F) scale.
Nearby radars
- KAMX · Miami, FL 1055 mi
- KBYX · Key West, FL 1101 mi
- KMLB · Melbourne, FL 1155 mi
- KTBW · Tampa, FL 1231 mi
- KJAX · Jacksonville, FL 1302 mi
TJUA radar FAQ
How often does TJUA update?
Every NEXRAD radar completes a full scan about every 4–6 minutes in storm mode, and repeats the lowest tilt more often (SAILS) during severe weather. TALON loads each new scan as it arrives.
What is the range of TJUA?
Reflectivity reaches about 290 miles and velocity about 185 miles, but useful low-level detail is within roughly 100 miles — see the table above.
Is TJUA down?
Radars occasionally go offline for maintenance. When one does, TALON's US radar map fills the gap from neighboring radars (KAMX, KBYX, KMLB).