Rockville, MD Live Doppler Radar
Live radar for Rockville, Montgomery County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Rockville?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 277 days in the Central and Southeast Montgomery forecast zone and Montgomery County — the most common reported hazard around Rockville, mostly in June and July. Next come flash flooding (101 days) and flooding (87 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 277 | Jun 2026 | Jun 26, 2009 · 2 deaths |
| Flash flooding | 101 | Jul 2025 | Jun 27, 2015 · 2 deaths · $10,000 damage |
| Flooding | 87 | Jul 2025 | Nov 16, 2006 · $50,000 damage |
| Lightning casualties & damage | 34 | May 2024 | Jul 25, 2010 · 1 death |
| Excessive heat | 23 | Jul 2024 | Jul 20, 2019 · 1 death |
| Heavy snow & winter storms | 11 | Jan 2026 | — |
| High winds | 9 | Feb 2026 | — |
| Extreme cold & wind chill | 8 | Feb 2026 | — |
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 Central and Southeast Montgomery forecast zone and Montgomery County; damage is as reported, not adjusted for inflation.
How much snow does Rockville get?
A normal year brings about 5.8 inches of snow to Rockville, based on NOAA's 1991–2020 climate normals for the Dalecarlia Rsvr weather station 10.3 miles away. The snowiest month is usually January (2.9 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.0 | 0.0 | 0.8 | 2.9 | 1.4 | 0.7 | 0.0 | 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 Rockville?
The closest NEXRAD Doppler radar is KLWX (Sterling, MD), about 19 miles west-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.
| Radar | Distance | Lowest beam over Rockville | View |
|---|---|---|---|
| KLWX Sterling, MD | 19 mi west-southwest | 1,100 ft | Excellent — the lowest scan sees close to the ground |
| KDOX Dover AFB, DE | 94 mi east | 8,700 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KCCX State College, PA | 135 mi north-northwest | 15,300 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 Rockville
Since 1950, NOAA has recorded 121 tornadoes within 25 miles of Rockville, 15 of them EF2/F2 or stronger. Most came in July and June. The strongest was an F3 on September 24, 2001, which passed about 13 miles east-southeast of town and caused 2 deaths. The most recent was an EF0 on June 18, 2025, which touched down about 24 miles east of town.
Hail: 479 reports of 1-inch or larger hail within 25 miles since 1955, 27 of them 2 inches or more; the largest was 5.00-inch hail on July 2, 1968.
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 Rockville'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.
Rockville radar FAQ
Where is the nearest weather radar to Rockville, MD?
KLWX (Sterling, MD), about 19 miles west-southwest. KDOX (Dover AFB, DE) is 94 miles away and also covers the area.
Does radar show snow in Rockville?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Rockville the lowest scan from KLWX is about 1,100 ft up.
Is TALON's radar for Rockville 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 Rockville, follow it right away — see watch vs. warning.