Portage Des Sioux, MO Live Doppler Radar
Live radar for Portage Des Sioux, St. Charles County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Portage Des Sioux?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 162 days in the St. Charles forecast zone and St. Charles County — the most common reported hazard around Portage Des Sioux, mostly in June and May. Next come excessive heat (78 days) and heavy snow & winter storms (49 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 162 | Jun 2026 | May 7, 2002 · $1.8 million damage |
| Excessive heat | 78 | Aug 2025 | Jul 1, 2012 · 1 death |
| Heavy snow & winter storms | 49 | Nov 2025 | Nov 30, 2006 · $20 million damage |
| Flash flooding | 41 | Jun 2026 | Jul 26, 2022 · $10 million damage |
| Flooding | 20 | Jun 2019 | May 3, 2019 · 2 deaths |
| High winds | 13 | Mar 2025 | Mar 14, 2025 · $20,000 damage |
| Ice storms & sleet | 7 | Feb 2022 | Jan 12, 2007 · $169,000 damage |
| Lightning casualties & damage | 6 | Jun 2014 | Jun 21, 2014 · $487,000 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 St. Charles forecast zone and St. Charles County; damage is as reported, not adjusted for inflation.
How much snow does Portage Des Sioux get?
A normal year brings about 13 inches of snow to Portage Des Sioux, based on NOAA's 1991–2020 climate normals for the Jerseyville 2 Sw weather station 11.9 miles away. The snowiest month is usually January (4.3 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.0 | 0.7 | 2.2 | 4.3 | 3.7 | 1.6 | 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 Portage Des Sioux?
The closest NEXRAD Doppler radar is KLSX (St. Louis, MO), about 24 miles 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 Portage Des Sioux | View |
|---|---|---|---|
| KLSX St. Louis, MO | 24 mi southwest | 1,400 ft | Excellent — the lowest scan sees close to the ground |
| KILX Lincoln, IL | 100 mi north-northeast | 9,600 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KVWX Evansville, IN | 149 mi east-southeast | 17,900 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 Portage Des Sioux
Since 1950, NOAA has recorded 140 tornadoes within 25 miles of Portage Des Sioux, 35 of them EF2/F2 or stronger. Most came in April and May. The strongest was an F4 on February 10, 1959, which passed about 20 miles south-southeast of town and caused 21 deaths. The most recent was an EF1 on June 4, 2025, which passed about 22 miles southwest of town.
Hail: 726 reports of 1-inch or larger hail within 25 miles since 1955, 91 of them 2 inches or more; the largest was 4.50-inch hail on May 25, 2011.
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 Portage Des Sioux'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.
Portage Des Sioux radar FAQ
Where is the nearest weather radar to Portage Des Sioux, MO?
KLSX (St. Louis, MO), about 24 miles southwest. KILX (Lincoln, IL) is 100 miles away and also covers the area.
Does radar show snow in Portage Des Sioux?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Portage Des Sioux the lowest scan from KLSX is about 1,400 ft up.
Is TALON's radar for Portage Des Sioux 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 Portage Des Sioux, follow it right away — see watch vs. warning.
Radar for nearby towns
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- Ferguson, MO radar 13 mi
- St. Charles, MO radar 13 mi
- Bellefontaine Neighbors, MO radar 14 mi