The Czech Hydrometeorological Institute (ČHMÚ) issued two back-to-back orange alerts on 11 May 2026 as supercell thunderstorms swept across the country, pelting Hodonín and Bruntál districts with hail the size of coins and dumping up to 30 mm of rain in less than an hour. Nine regions—including South Bohemia, Liberec and Vysočina—remain under warning until midnight, while a second alert covering Moravia and Silesia runs through 06:00 tomorrow. The agency cautions that flash flooding could close underpasses and low-lying rail sections, and that strong wind-shear may force air-traffic controllers to impose spacing delays at Václav Havel Airport.
![Meteorologists Issue Nationwide Severe-Storm Alert; Travel Advisories for Ten Regions]()
Travellers scrambling to adjust itineraries should also ensure their travel documents remain valid; VisaHQ (https://www.visahq.com/czech-republic/) offers rapid online Czech visa processing and extension services, delivering status alerts by email or SMS—a handy back-up if consular offices close early due to severe weather.
Road police have lowered speed limits on the D1 and D35 motorways, and several regional bus operators pre-emptively cancelled late-evening services to mountain villages. Rail infrastructure manager Správa železnic activated its “Storm Mode”, placing diesel rescue locomotives on standby in Olomouc and Jihlava to tow stalled electric trains if overhead lines are damaged. For companies moving staff between Prague, Brno and Ostrava, HR advisories recommend switching to morning departures or virtual meetings. Insurance brokers remind travellers that most corporate policies cover weather-related flight cancellations only if passengers obtain written confirmation from the carrier within 24 hours. The storms mark the onset of the „Ice Saints“ cold snap, with temperatures forecast to dip below 4 °C overnight—raising the prospect of further rail switch failures and de-icing operations at secondary airports later in the week.
Travellers scrambling to adjust itineraries should also ensure their travel documents remain valid; VisaHQ (https://www.visahq.com/czech-republic/) offers rapid online Czech visa processing and extension services, delivering status alerts by email or SMS—a handy back-up if consular offices close early due to severe weather.
Road police have lowered speed limits on the D1 and D35 motorways, and several regional bus operators pre-emptively cancelled late-evening services to mountain villages. Rail infrastructure manager Správa železnic activated its “Storm Mode”, placing diesel rescue locomotives on standby in Olomouc and Jihlava to tow stalled electric trains if overhead lines are damaged. For companies moving staff between Prague, Brno and Ostrava, HR advisories recommend switching to morning departures or virtual meetings. Insurance brokers remind travellers that most corporate policies cover weather-related flight cancellations only if passengers obtain written confirmation from the carrier within 24 hours. The storms mark the onset of the „Ice Saints“ cold snap, with temperatures forecast to dip below 4 °C overnight—raising the prospect of further rail switch failures and de-icing operations at secondary airports later in the week.
