Derby, CT Live Doppler Radar
Live radar for Derby, New Haven County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Derby?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 131 days in the Northern New Haven forecast zone and New Haven County — the most common reported hazard around Derby, mostly in July and June. Next come heavy snow & winter storms (83 days) and flash flooding (70 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 131 | Jun 2026 | Jun 2, 2000 · 1 death |
| Heavy snow & winter storms | 83 | Feb 2026 | Feb 1, 2011 · $1.4 million damage |
| Flash flooding | 70 | Aug 2025 | Aug 18, 2024 · 2 deaths |
| Lightning casualties & damage | 28 | Jul 2025 | Jun 8, 2008 · 1 death |
| Flooding | 27 | Sep 2021 | Apr 23, 2006 · 1 death |
| High winds | 22 | Feb 2025 | Oct 29, 2012 · 1 death · $300,000 damage |
| Excessive heat | 12 | Jul 2019 | — |
| Blizzards | 5 | Mar 2017 | — |
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 Northern New Haven forecast zone and New Haven County; damage is as reported, not adjusted for inflation.
How much snow does Derby get?
A normal year brings about 34 inches of snow to Derby, based on NOAA's 1991–2020 climate normals for the Bridgeport Sikorsky Mem Ap weather station 11.8 miles away. The snowiest month is usually February (10.7 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.1 | 0.9 | 5.5 | 8.5 | 10.7 | 7.0 | 0.9 | 0.0 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Derby?
The closest NEXRAD Doppler radar is KOKX (Upton, NY), about 34 miles south-southeast. 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 Derby | View |
|---|---|---|---|
| KOKX Upton, NY | 34 mi south-southeast | 2,100 ft | Excellent — the lowest scan sees close to the ground |
| KENX Albany, NY | 101 mi north-northwest | 9,700 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KBOX Boston, MA | 110 mi east-northeast | 11,000 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 Derby
Since 1950, NOAA has recorded 49 tornadoes within 25 miles of Derby, 11 of them EF2/F2 or stronger. Most came in July and August. The strongest was an F4 on July 10, 1989, which passed about 8 miles east of town. The most recent was an EF0 on August 12, 2023, which touched down about 18 miles northwest of town.
Hail: 93 reports of 1-inch or larger hail within 25 miles since 1955, 2 of them 2 inches or more; the largest was 2.00-inch hail on July 1, 2012.
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 Derby'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.
Derby radar FAQ
Where is the nearest weather radar to Derby, CT?
KOKX (Upton, NY), about 34 miles south-southeast. KENX (Albany, NY) is 101 miles away and also covers the area.
Does radar show snow in Derby?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Derby the lowest scan from KOKX is about 2,100 ft up.
Is TALON's radar for Derby 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 Derby, follow it right away — see watch vs. warning.
Radar for nearby towns
- Ansonia, CT radar 1 mi
- Shelton, CT radar 3 mi
- West Haven, CT radar 7 mi
- Milford, CT radar 7 mi
- New Haven, CT radar 8 mi
- Woodmont, CT radar 9 mi
- Bridgeport, CT radar 11 mi
- Naugatuck, CT radar 11 mi
- Newtown, CT radar 13 mi
- Waterbury, CT radar 16 mi