Mercersburg, PA Live Doppler Radar

Live radar for Mercersburg, Franklin County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.

Open live radar for MercersburgWhat TALON shows

What weather hits Mercersburg?

Since 1996, the National Weather Service has logged damaging thunderstorm winds on 151 days in the Franklin forecast zone and Franklin County — the most common reported hazard around Mercersburg, mostly in June and July. Next come heavy snow & winter storms (61 days) and flash flooding (43 days).

HazardDays reportedMost recentWorst on record
Damaging thunderstorm winds151Jun 2026Jan 19, 1996 · $500,000 damage
Heavy snow & winter storms61Jan 2026Jan 6, 2024 · $60,000 damage
Flash flooding43Aug 2025Jun 18, 1996 · $1.0 million damage
Flooding16May 2025—
High winds15Apr 2021May 3, 1997 · 1 death
Excessive heat8Jul 2025—
Ice storms & sleet6Jan 2014—
Extreme cold & wind chill4Jan 2025—

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 Franklin forecast zone and Franklin County; damage is as reported, not adjusted for inflation.

Which radars cover Mercersburg?

The closest NEXRAD Doppler radar is KLWX (Sterling, MD), about 63 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.

RadarDistanceLowest beam over MercersburgView
KLWX
Sterling, MD		63 mi south-southeast4,900 ftGood — most storms and steady rain or snow show clearly
KCCX
State College, PA		76 mi north6,300 ftFair — the beam can pass over shallow snow and low-level rotation
KPBZ
Pittsburgh, PA		131 mi west-northwest14,700 ftLimited — 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 Mercersburg

Since 1950, NOAA has recorded 41 tornadoes within 25 miles of Mercersburg, 2 of them EF2/F2 or stronger. Most came in June and July. The strongest was an F2 on April 30, 1994, which passed about 14 miles east of town. The most recent was an EF1 on June 17, 2025, which touched down about 24 miles west of town.

Hail: 172 reports of 1-inch or larger hail within 25 miles since 1955, 13 of them 2 inches or more; the largest was 4.00-inch hail on August 7, 2023.

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 Mercersburg'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.

Mercersburg radar FAQ

Where is the nearest weather radar to Mercersburg, PA?

KLWX (Sterling, MD), about 63 miles south-southeast. KCCX (State College, PA) is 76 miles away and also covers the area.

Does radar show snow in Mercersburg?

Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Mercersburg the lowest scan from KLWX is about 4,900 ft up.

Is TALON's radar for Mercersburg 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 Mercersburg, follow it right away — see watch vs. warning.

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