Nicasio, CA Live Doppler Radar
Live radar for Nicasio, Marin County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Nicasio?
Since 1996, the National Weather Service has logged river or areal flooding on 60 days in the Marin Coastal Range forecast zone and Marin County — the most common reported hazard around Nicasio, mostly in January and February. Next come debris flows (16 days) and flash flooding (15 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Flooding | 60 | Dec 2025 | Jan 1, 2006 · $108 million damage |
| Debris flows | 16 | Jan 2021 | Dec 11, 2014 · $1.0 million damage |
| Flash flooding | 15 | Feb 2017 | Dec 11, 2014 · $4.0 million damage |
| High winds | 12 | Jan 2026 | — |
| Damaging thunderstorm winds | 4 | Dec 2025 | — |
| Lightning casualties & damage | 2 | Dec 2019 | Sep 12, 2009 · $30,000 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 Marin Coastal Range forecast zone and Marin County; damage is as reported, not adjusted for inflation.
Which radars cover Nicasio?
The closest NEXRAD Doppler radar is KDAX (Sacramento, CA), about 63 miles east-northeast. 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.
| Radar | Distance | Lowest beam over Nicasio | View |
|---|---|---|---|
| KDAX Sacramento, CA | 63 mi east-northeast | 4,900 ft | Good — most storms and steady rain or snow show clearly |
| KMUX San Francisco, CA | 76 mi southeast | 6,400 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KBBX Beale AFB, CA | 115 mi north-northeast | 11,900 ft | Limited — the beam overshoots the lowest part of storms |
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 Nicasio
Since 1950, NOAA has recorded 5 tornadoes within 25 miles of Nicasio, 1 of them EF2/F2 or stronger. Most came in December and June. The strongest was an F2 on June 1, 1958, which passed about 21 miles north-northwest of town. The most recent was an F0 on December 5, 1998, which touched down about 21 miles east-southeast of town.
Hail: 1 report of 1-inch or larger hail within 25 miles since 1955; the largest was 1.00-inch hail on March 4, 1996.
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 Nicasio'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.
Nicasio radar FAQ
Where is the nearest weather radar to Nicasio, CA?
KDAX (Sacramento, CA), about 63 miles east-northeast. KMUX (San Francisco, CA) is 76 miles away and also covers the area.
How often does Nicasio flood?
Since 1996 the National Weather Service has logged river or areal flooding on 60 days in the Marin Coastal Range forecast zone and Marin County. TALON's free flash-flood risk layer shows, every 2 minutes, how close the rain that has fallen is to what it takes to flood — turn it on under Layers.
Is TALON's radar for Nicasio 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 Nicasio, follow it right away — see watch vs. warning.
Radar for nearby towns
- Fairfax, CA radar 8 mi
- Novato, CA radar 8 mi
- San Anselmo, CA radar 9 mi
- Ross, CA radar 10 mi
- San Rafael, CA radar 12 mi
- Larkspur, CA radar 12 mi
- Petaluma, CA radar 13 mi
- Mill Valley, CA radar 14 mi
- Corte Madera, CA radar 14 mi
- Tiburon, CA radar 18 mi