Griswold, IA Live Doppler Radar
Live radar for Griswold, Cass County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Griswold?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 89 days in the Cass forecast zone and Cass County — the most common reported hazard around Griswold, mostly in June and May. Next come heavy snow & winter storms (43 days) and high winds (34 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 89 | Jul 2025 | Jun 21, 1997 · $1.1 million damage |
| Heavy snow & winter storms | 43 | Jan 2024 | Feb 1, 2015 · 1 death · $50,000 damage |
| High winds | 34 | Mar 2025 | Nov 10, 1998 · $305,000 damage |
| Flash flooding | 23 | Sep 2019 | Jun 14, 1998 · $3.2 million damage |
| Extreme cold & wind chill | 15 | Jan 2025 | Sep 21, 1999 · $294,000 damage |
| Flooding | 15 | Mar 2019 | Jun 12, 2010 · $20 million damage |
| Blizzards | 14 | Mar 2025 | Dec 20, 2012 · $100,000 damage |
| Ice storms & sleet | 13 | Jan 2017 | Jan 20, 2010 · $750,000 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 Cass forecast zone and Cass County; damage is as reported, not adjusted for inflation.
How much snow does Griswold get?
A normal year brings about 28 inches of snow to Griswold, based on NOAA's 1991–2020 climate normals for the Oakland weather station 13.6 miles away. The snowiest month is usually February (8.0 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 1.0 | 1.2 | 6.5 | 6.7 | 8.0 | 3.4 | 1.1 | 0.1 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Griswold?
The closest NEXRAD Doppler radar is KOAX (Omaha, NE), about 64 miles west. 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 Griswold | View |
|---|---|---|---|
| KOAX Omaha, NE | 64 mi west | 5,000 ft | Good — most storms and steady rain or snow show clearly |
| KDMX Des Moines, IA | 81 mi east-northeast | 7,000 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KTWX Topeka, KS | 165 mi south-southwest | 21,200 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 Griswold
Since 1950, NOAA has recorded 120 tornadoes within 25 miles of Griswold, 25 of them EF2/F2 or stronger. Most came in May and June. The strongest was an EF4 on May 21, 2024, which passed about 24 miles southeast of town and caused 5 deaths. The most recent was an EF1 on April 17, 2025, which passed about 24 miles south of town.
Hail: 340 reports of 1-inch or larger hail within 25 miles since 1955, 56 of them 2 inches or more; the largest was 4.00-inch hail on June 18, 2021.
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 Griswold'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.
Griswold radar FAQ
Where is the nearest weather radar to Griswold, IA?
KOAX (Omaha, NE), about 64 miles west. KDMX (Des Moines, IA) is 81 miles away and also covers the area.
Does radar show snow in Griswold?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Griswold the lowest scan from KOAX is about 5,000 ft up.
Is TALON's radar for Griswold 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 Griswold, follow it right away — see watch vs. warning.
Radar for nearby towns
- Atlantic, IA radar 13 mi
- Oakland, IA radar 15 mi
- Red Oak, IA radar 16 mi
- Avoca, IA radar 20 mi
- Villisca, IA radar 23 mi
- Treynor, IA radar 24 mi
- Corning, IA radar 27 mi
- Malvern, IA radar 28 mi
- Harlan, IA radar 30 mi
- Glenwood, IA radar 34 mi