Potosi, WI Live Doppler Radar
Live radar for Potosi, Grant County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Potosi?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 104 days in the Grant forecast zone and Grant County — the most common reported hazard around Potosi, mostly in June and July. Next come heavy snow & winter storms (68 days) and flooding (48 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 104 | Jun 2026 | Jul 20, 2006 · 1 death · $1,000 damage |
| Heavy snow & winter storms | 68 | Mar 2026 | Jan 20, 2012 · $10,000 damage |
| Flooding | 48 | Apr 2026 | May 1, 2001 · $2.2 million damage |
| Flash flooding | 46 | Aug 2025 | Jul 21, 2017 · $8.5 million damage |
| Extreme cold & wind chill | 17 | Jan 2026 | — |
| Excessive heat | 13 | Jun 2026 | Jul 17, 2011 · $25,000 damage |
| High winds | 7 | Mar 2026 | Nov 10, 1998 · $250,000 damage |
| Blizzards | 7 | Jan 2014 | — |
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 Grant forecast zone and Grant County; damage is as reported, not adjusted for inflation.
How much snow does Potosi get?
A normal year brings about 36 inches of snow to Potosi, based on NOAA's 1991–2020 climate normals for the Dubuque L&D 11 weather station 10.5 miles away. The snowiest month is usually January (11.7 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.1 | 1.2 | 9.9 | 11.7 | 8.6 | 3.7 | 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 Potosi?
The closest NEXRAD Doppler radar is KDVN (Quad Cities, IA), about 74 miles south. 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 Potosi | View |
|---|---|---|---|
| KDVN Quad Cities, IA | 74 mi south | 6,200 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KARX La Crosse, WI | 82 mi north-northwest | 7,200 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KMKX Milwaukee/Sullivan, WI | 111 mi east | 11,300 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 Potosi
Since 1950, NOAA has recorded 106 tornadoes within 25 miles of Potosi, 27 of them EF2/F2 or stronger. Most came in June and May. The strongest was an F3 on May 30, 1985, which passed about 19 miles north-northwest of town and caused 2 deaths. The most recent was an EF1 on July 15, 2024, which touched down about 9 miles southeast of town.
Hail: 301 reports of 1-inch or larger hail within 25 miles since 1955, 43 of them 2 inches or more; the largest was 4.50-inch hail on August 19, 1994.
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 Potosi'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.
Potosi radar FAQ
Where is the nearest weather radar to Potosi, WI?
KDVN (Quad Cities, IA), about 74 miles south. KARX (La Crosse, WI) is 82 miles away and also covers the area.
Does radar show snow in Potosi?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Potosi the lowest scan from KDVN is about 6,200 ft up, so light snow from shallow clouds can be under-shown — check NWS winter alerts too.
Is TALON's radar for Potosi 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 Potosi, follow it right away — see watch vs. warning.
Radar for nearby towns
- Dickeyville, WI radar 7 mi
- Lancaster, WI radar 11 mi
- Platteville, WI radar 13 mi
- Cuba City, WI radar 15 mi
- Hazel Green, WI radar 17 mi
- Belmont, WI radar 19 mi
- Fennimore, WI radar 21 mi
- Shullsburg, WI radar 25 mi
- Mineral Point, WI radar 29 mi
- Darlington, WI radar 30 mi