Union, NH Live Doppler Radar
Live radar for Union, Carroll County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Union?
Since 1996, the National Weather Service has logged heavy snow or a winter storm on 170 days in the Southern Carroll forecast zone and Carroll County — the most common reported hazard around Union, mostly in February and January. Next come damaging thunderstorm winds (95 days) and flooding (47 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Heavy snow & winter storms | 170 | Jan 2026 | — |
| Damaging thunderstorm winds | 95 | Jun 2026 | Jun 6, 2020 · $200,000 damage |
| Flooding | 47 | Jun 2026 | Apr 16, 2007 · $1.2 million damage |
| Flash flooding | 23 | Jun 2026 | Aug 28, 2011 · $2.4 million damage |
| Extreme cold & wind chill | 22 | Jan 2026 | — |
| Lightning casualties & damage | 20 | May 2020 | Jul 19, 2005 · $200,000 damage |
| High winds | 17 | Mar 2021 | Oct 29, 2012 · $100,000 damage |
| Excessive heat | 3 | Jun 2024 | — |
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 Southern Carroll forecast zone and Carroll County; damage is as reported, not adjusted for inflation.
Which radars cover Union?
The closest NEXRAD Doppler radar is KGYX (Portland, ME), about 47 miles 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 Union | View |
|---|---|---|---|
| KGYX Portland, ME | 47 mi northeast | 3,300 ft | Good — most storms and steady rain or snow show clearly |
| KBOX Boston, MA | 106 mi south | 10,500 ft | Limited — the beam overshoots the lowest part of storms |
| KCXX Burlington, VT | 128 mi northwest | 14,000 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 Union
Since 1950, NOAA has recorded 30 tornadoes within 25 miles of Union, 7 of them EF2/F2 or stronger. Most came in July and August. The strongest was an EF2 on July 24, 2008, which passed about 6 miles west-northwest of town and caused 1 death. The most recent was an EF0 on August 22, 2020, which touched down about 12 miles west-northwest of town.
Hail: 131 reports of 1-inch or larger hail within 25 miles since 1955, 6 of them 2 inches or more; the largest was 2.75-inch hail on July 19, 2015.
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 Union'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.
Union radar FAQ
Where is the nearest weather radar to Union, NH?
KGYX (Portland, ME), about 47 miles northeast. KBOX (Boston, MA) is 106 miles away and also covers the area.
Does radar show snow in Union?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Union the lowest scan from KGYX is about 3,300 ft up.
Is TALON's radar for Union 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 Union, follow it right away — see watch vs. warning.
Radar for nearby towns
- Rochester, NH radar 14 mi
- Somersworth, NH radar 18 mi
- Dover, NH radar 22 mi
- Laconia, NH radar 24 mi
- Portsmouth, NH radar 32 mi
- Concord, NH radar 32 mi
- Franklin, NH radar 33 mi
- Manchester, NH radar 41 mi
- Nashua, NH radar 56 mi