The storm forecast for Corsica on August 19, 2026, did indeed trigger an orange alert in Haute-Corse on Friday, August 21. However, the predicted gusts exceeding 120 to 150 km/h did not materialize at those levels: Météo-France recorded 109 km/h in Marignana, in Corse-du-Sud. This alert has now ended; this is a review of a past event, not a current forecast.
An orange alert was issued for Haute-Corse on August 21st.
In its article published on Wednesday, August 19, actu.fr reported on the forecast of a potentially violent weather event expected between Thursday evening and Friday. The risk concerned Corsica, with thunderstorms likely to be accompanied by heavy rain, lightning, and strong gusts of wind.
The Haute-Corse prefecture subsequently announced an orange alert for thunderstorms for Friday, August 21, from 6:00 a.m. to at least 10:00 a.m. It predicted gusts that could locally reach 150 km/h or more, as well as 30 to 50 mm of rain in a short period. The department also temporarily prohibited access to forest areas, hiking trails, and waterways, as well as the practice of outdoor activities, from Thursday, August 20 at 8:00 p.m. to Friday, August 21 at 11:59 p.m. ( haute-corse.gouv.fr )
Gusts less strong than feared
The report published by Météo-France on August 21 confirms the passage of several waves of thunderstorms between the Balearic Islands, Provence, and Corsica. In South Corsica, a gust of 109 km/h was recorded in Marignana. This reading is significantly lower than the maximum values predicted in the forecasts issued before the storm. ( meteofrance.com )
Vigilance should therefore not be confused with mere observation: the values of 120 to 150 km/h corresponded to a predicted risk for the most exposed areas, not to gusts observed everywhere on the island. The sources consulted confirm sometimes violent storms, but do not allow for a complete assessment of the damage or local consequences.
What this episode changed for the inhabitants
For residents and visitors of Haute-Corse, the prefectural decision has resulted in concrete restrictions on outings in the forest, hiking, and outdoor recreation during the announced period. The prefecture also warned that road conditions could deteriorate rapidly and urged people to avoid flooded roads.
The initial article suggested a possible resemblance to the deadly storms of August 18, 2022. This comparison was presented as a meteorological hypothesis, not as certainty of an event of the same intensity. Météo-France’s observations for August 21 confirm thunderstorms and strong gusts, but do not justify equating them with the 2022 event. ( meteofrance.com )
Source: Corsica – Continuous news – actu.fr
Original article: See the original source
