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Last update: 12:00, 24 Aug 2026
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Rain in Nysa: What You Need to Know
Nysa sits on the Nysa Klodzka river, in the same southwest Poland belt that received over 400mm of rain in three days during Storm Boris in September 2024 — an event that broke a flood bank in Nysa itself. A Nysa rain radar exists for exactly that kind of moment: a hyperlocal radar shows water rising along the Nysa Klodzka in real time, not in a next-day evacuation notice.
The mechanism was river-basin rainfall overwhelming flood defenses built for smaller events. Flood barriers failed in both Nysa and neighboring Klodzko during Storm Boris, with water reaching up to 150cm in Klodzko town centre. A single regional forecast could not show which town's defenses would give way first — only a radar tracking the storm's actual path over the Nysa Klodzka basin could.
RainViewer draws its Nysa feed from IMGW, refreshed every 5 minutes, so the map reflects the newest radar scan rather than a forecast issued hours earlier. What a live map shows and a forecast cannot: whether rain over the upper Nysa Klodzka basin is easing or building toward the kind of surge that broke Nysa's flood bank in 2024.
Rain by Season in Nysa
Wet-season peak (mid-September)
Storm Boris struck the region on 14–16 September 2024, and local officials called it the worst flooding Nysa had seen in more than 20 years. That week remains the clearest documented rain-risk peak for the city.
Surrounding flood-risk window
A confirmed month-by-month rainfall breakdown for Nysa outside the September 2024 event is not available. Given how fast the 2024 flood escalated, the weeks around the documented September peak are the period worth watching most closely on radar.
Quieter stretch of the year
Detailed rainfall data for Nysa's calmer months has not been confirmed in this research pass. Residents can still use the radar routinely, since the 2024 event showed how little warning a river-basin system can give once it starts building.
Why You Need a Rain Radar in Nysa
2024 flood-bank collapse zone
A flood bank collapsed in Nysa city itself on 16 September 2024, and the mayor ordered evacuations for almost 44,000 people — the worst flooding the city had seen in over 20 years. Residents in the affected area can track the radar closely whenever heavy rain returns to the Nysa Klodzka basin.
Topola dam watch (Paczkow, Nysa County)
The Topola dam in Paczkow, within Nysa County, collapsed the same day, sending floodwater toward the village of Kozielno. Anyone downstream in Nysa County benefits from checking the radar before a storm reaches the upper basin.
Klodzko–Nysa corridor travel
Klodzko, just up the Nysa Klodzka basin, saw water reach 150cm in its town centre during the same event that breached Nysa's flood bank. Drivers and residents moving between the two towns should check the live radar before travel during any active rain warning.
Power and infrastructure disruption
The wider 2024 Central European floods, of which the Nysa event was part, killed 10 people in Poland and left 50,000–70,000 without electricity. Households and businesses can use the radar to judge how long a system is likely to sit over the region before power crews can respond.
RainViewer Radar Coverage in Nysa
RainViewer draws radar data for Poland from the Institute of Meteorology and Water Management (IMGW) via danepubliczne.imgw.pl, updated every 5 minutes. Coverage is comprehensive across the country. Nysa sits close enough to Klodzko and Paczkow that a single map shows rain building across the whole Nysa Klodzka basin at once.
Nysa Rain Radar: Frequently Asked Questions
- Is it raining in Nysa right now?
The fastest way to know is a live hyperlocal radar, since rain over the Nysa Klodzka basin can escalate as fast as it did during the 2024 flood-bank collapse. RainViewer pulls fresh IMGW radar scans every 5 minutes, showing conditions as they are rather than a forecast written hours earlier.
- What happened during the 2024 Nysa flood?
A flood bank collapsed in Nysa city on 16 September 2024 during Storm Boris, and the mayor evacuated almost 44,000 people in what officials called the worst flooding in over 20 years. The nearby Topola dam in Paczkow also collapsed the same day, sending floodwater toward the village of Kozielno.
- Does rain affect travel between Nysa and Klodzko?
Yes — during the 2024 event, water reached 150cm in Klodzko town centre while Nysa's own flood bank failed on the same day. Checking the live radar before travel along the Nysa Klodzka corridor is safer than relying on a general regional forecast.
- Does Nysa flood when the Nysa Klodzka rises?
Yes — a flood bank collapsed in Nysa city itself on 16 September 2024, forcing the evacuation of almost 44,000 people, and officials called it the worst flooding Nysa had seen in over 20 years. Residents should track the radar closely whenever a heavy-rain warning covers the Nysa Klodzka basin.
- When is the best time to visit Nysa to avoid heavy rain?
Mid-September carries the clearest documented rain risk, based on the 2024 Storm Boris event. A confirmed breakdown for the rest of the year is not available, so checking the radar before any visit is the more reliable approach.
- Why did the 2024 flood hit Nysa and Klodzko so hard?
Storm Boris delivered over 400mm of rain in three days across the southwest Poland belt that includes both towns, overwhelming flood defenses built for smaller events. That basin-wide rainfall, not a single storm cell, is what broke Nysa's flood bank and the Topola dam in Paczkow on the same day.
- Is there a live rain radar for Nysa?
Yes — RainViewer's hyperlocal radar for Nysa draws directly from IMGW, refreshing every 5 minutes with new scans instead of a periodic forecast update. The map also covers Klodzko and Paczkow, so basin-wide systems are visible before they reach the city.
- Can I get a rain alert before it hits central Nysa or the Topola dam area?
Yes — RainViewer's rain alerts can be set for a specific point like central Nysa or the Paczkow area near the Topola dam, so residents get a notification as rain approaches instead of checking the map manually. That advance window is what could have given Nysa residents more warning before the 2024 flood bank collapse.
Track Rain in Nysa in Real Time
Nysa residents and Nysa County households near Paczkow both live with a documented flood risk that turned into a 44,000-person evacuation in September 2024. The Nysa Klodzka basin can go from a heavy-rain warning to a flood-bank collapse within days, and Storm Boris showed how little time a regional forecast gives once the water starts rising.
A generic forecast says heavy rain for southwest Poland this week. RainViewer's live hyperlocal radar shows it is already rising over the Nysa Klodzka near Klodzko while central Nysa stays dry — that is the call a resident makes every time a basin-wide system builds.
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2-hour forecast in 5-minute slices
See whether rain building over the Nysa Klodzka basin clears central Nysa or settles in for the next two hours.
Rain alerts before arrival
Set an alert for central Nysa or the Paczkow area and get notified before a system reaches it.
Direction arrows on the map
See whether a system is tracking down the Nysa Klodzka basin from Klodzko or breaking apart before it arrives.
48 hours of radar history
Review the last 48 hours to see how a basin-wide system like Storm Boris built and moved through the region.
Multiple locations
Track central Nysa, Klodzko, and the Paczkow area at the same time.
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