Grand Terrace, CA Live Doppler Radar

Live radar for Grand Terrace, San Bernardino County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.

Open live radar for Grand TerraceWhat TALON shows

What weather hits Grand Terrace?

Since 1996, the National Weather Service has logged flash flooding on 340 days in the San Bernardino and Riverside County Valleys-The Inland Empire forecast zone and San Bernardino County — the most common reported hazard around Grand Terrace, mostly in August and July. Next come high winds (170 days) and wildfires (148 days).

HazardDays reportedMost recentWorst on record
Flash flooding340Feb 2026Aug 26, 2003 · 3 deaths · $50,000 damage
High winds170Jan 2026Jan 14, 2011 · 3 deaths · $15,000 damage
Wildfires148Jan 2025Oct 25, 2003 · 4 deaths · $696 million damage
Damaging thunderstorm winds129Feb 2026Jun 3, 2009 · 1 death · $20,000 damage
Flooding108Feb 2026Dec 19, 2010 · 1 death
Excessive heat60Aug 2025Jul 21, 2006 · 10 deaths
Lightning casualties & damage58Sep 2024Jun 3, 2009 · 1 death · $1,000 damage
Debris flows40Aug 2025Sep 12, 2022 · 1 death · $6.0 million damage

Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the San Bernardino and Riverside County Valleys-The Inland Empire forecast zone and San Bernardino County; damage is as reported, not adjusted for inflation.

Which radars cover Grand Terrace?

The closest NEXRAD Doppler radar is KSOX (Santa Ana Mountains, CA), about 24 miles southwest. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.

RadarDistanceLowest beam over Grand TerraceView
KSOX
Santa Ana Mountains, CA		24 mi southwest1,400 ftExcellent — the lowest scan sees close to the ground
KEYX
Edwards AFB, CA		75 mi north6,300 ftFair — the beam can pass over shallow snow and low-level rotation
KNKX
San Diego, CA		78 mi south-southeast6,700 ftFair — the beam can pass over shallow snow and low-level rotation

Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.

Tornado & hail history near Grand Terrace

Since 1950, NOAA has recorded 16 tornadoes within 25 miles of Grand Terrace, 1 of them EF2/F2 or stronger. Most came in May and March. The strongest was an EF2 on May 22, 2008, which touched down about 11 miles south-southeast of town. The most recent was an EF0 on October 8, 2022, which touched down about 24 miles south-southeast of town.

Hail: 10 reports of 1-inch or larger hail within 25 miles since 1955, 1 of them 2 inches or more; the largest was 2.75-inch hail on September 2, 1960.

Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.

On TALON you get Grand Terrace's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.

Grand Terrace radar FAQ

Where is the nearest weather radar to Grand Terrace, CA?

KSOX (Santa Ana Mountains, CA), about 24 miles southwest. KEYX (Edwards AFB, CA) is 75 miles away and also covers the area.

Does radar show snow in Grand Terrace?

Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Grand Terrace the lowest scan from KSOX is about 1,400 ft up.

Is TALON's radar for Grand Terrace free?

Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.

Should I rely on radar for my safety?

No app replaces official warnings. When the National Weather Service issues a warning for Grand Terrace, follow it right away — see watch vs. warning.

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