Longmont, CO Live Doppler Radar
Live radar for Longmont, Boulder County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Longmont?
Since 1996, the National Weather Service has logged high winds on 118 days in the Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County forecast zone and Boulder County — the most common reported hazard around Longmont, mostly in December and January. Next come heavy snow & winter storms (112 days) and damaging thunderstorm winds (28 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| High winds | 118 | Mar 2026 | Apr 17, 2018 · 1 death |
| Heavy snow & winter storms | 112 | May 2026 | — |
| Damaging thunderstorm winds | 28 | Jul 2024 | Jun 15, 2009 · $20,000 damage |
| Lightning casualties & damage | 28 | Jul 2019 | Jul 14, 2019 · 1 death |
| Flash flooding | 18 | Jul 2021 | Sep 11, 2013 · 3 deaths |
| Blizzards | 5 | Mar 2021 | Mar 17, 2003 · $16 million damage |
| Extreme cold & wind chill | 5 | Jan 2025 | — |
| Wildfires | 5 | Aug 2024 | Dec 30, 2021 · 2 deaths · $2.0 billion 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 Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County forecast zone and Boulder County; damage is as reported, not adjusted for inflation.
How much snow does Longmont get?
A normal year brings about 47 inches of snow to Longmont, based on NOAA's 1991–2020 climate normals for the Longmont 2.1 N weather station 2.2 miles away. The snowiest month is usually February (9.4 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 3.4 | 5.7 | 8.3 | 5.9 | 9.4 | 8.2 | 5.2 | 1.3 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Longmont?
The closest NEXRAD Doppler radar is KFTG (Denver/Boulder, CO), about 39 miles 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 Longmont | View |
|---|---|---|---|
| KFTG Denver/Boulder, CO | 39 mi southeast | 2,600 ft | Excellent — the lowest scan sees close to the ground |
| KCYS Cheyenne, WY | 70 mi north-northeast | 5,600 ft | Good — most storms and steady rain or snow show clearly |
| KPUX Pueblo, CO | 128 mi south-southeast | 14,100 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 Longmont
Since 1950, NOAA has recorded 128 tornadoes within 25 miles of Longmont, 12 of them EF2/F2 or stronger. Most came in June and May. The strongest was an EF3 on May 22, 2008, which passed about 18 miles east-northeast of town and caused 1 death. The most recent was a tornado of unknown strength on June 13, 2025, which touched down about 23 miles southeast of town.
Hail: 815 reports of 1-inch or larger hail within 25 miles since 1955, 74 of them 2 inches or more; the largest was 4.00-inch hail on May 18, 1958.
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 Longmont'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.
Longmont radar FAQ
Where is the nearest weather radar to Longmont, CO?
KFTG (Denver/Boulder, CO), about 39 miles southeast. KCYS (Cheyenne, WY) is 70 miles away and also covers the area.
Does radar show snow in Longmont?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Longmont the lowest scan from KFTG is about 2,600 ft up.
Is TALON's radar for Longmont 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 Longmont, follow it right away — see watch vs. warning.
Radar for nearby towns
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