Slippery roads, thermometers dropping: this Friday, November 21, 2025, Météo-France places 76 departments on snow-ice alert, with severe cold, wind, and avalanches depending on the areas. From Seine-Maritime to Aveyron, up to the Sault plateau (Aude), winter is setting in. Why this episode, where are the risk areas, what will happen this weekend, and how to prepare? Key elements and useful advice.
Snow weather: what is happening today?
Frosted windshields, shiny sidewalks, biting wind: this Friday, November 21, 2025, France awakens under a generalized cold wave weather. Météo-France places 76 departments on yellow snow-ice alert and issues several other alerts (severe cold, wind, avalanches, storms). Seine-Maritime is particularly monitored: a snow-ice alert is active at least until 10 a.m., with reactivation announced around 9 p.m. for a new episode likely to complicate evening and night travel.
In the department, rain and snow showers may occur throughout the territory. Inland, black ice is more treacherous, with morning temperatures hovering between 0 and 2 °C. Gusts reach about 40 km/h around Rouen and 60 km/h near Le Havre. During the day, highs are limited to 8 °C in Le Havre and 7 °C in Rouen, below seasonal norms.
Where are the conditions most challenging?
Normandy: Seine-Maritime concentrates risks related to freezing rain and slippery roads. Secondary roads, shaded areas, and bridges are particularly exposed to refreezing.
Occitanie: on the Sault plateau (Aude), Camurac and Comus woke up under the first real snow of the season: 15 cm in the village, 20 to 30 cm in Camurac. A local blizzard enhances the cold sensation, with temperatures close to –5 °C. School transport is canceled and traffic remains challenging despite the intervention of snowplows.
Aveyron: the cold is pronounced. The –10 °C mark was nearly reached in the early morning: –9.1 °C in Alpuech, –9 °C in Brameloup and at the Laguiole station. Snow and ice are reported in several areas, with difficult roads from dawn.
Northeast quarter: the combination of snow-ice-severe cold is most frequent here. In the mountains (Jura, Alps, Massif Central, Pyrenean foothills), more sustained falls from 200 to 300 m altitude, with ground retention facilitated by the north wind, notably Northern Alps (Morzine, Les Gets).
Mediterranean and Atlantic coast: milder atmosphere (Ajaccio 14 °C, Nice 11 °C, Brest/Rennes/Nantes 10 °C) but southeast weather risks with strong wind (mistral, tramontane) and rainy episodes.
When will the situation change?
Friday 21/11: day of marked cold, humid at times, with rain-snow mix in many western and northern plains, and freezing drizzle locally. In Seine-Maritime, a reactivation of the snow-ice alert is expected around 9 p.m. (Paris time).
Saturday 22/11: widespread frost at dawn (–3 to –7 °C in places). The cold, often dry, settles over a large eastern half. However, a rainy and windy disturbance reaches the Atlantic by midday.
Sunday 23/11: milder but humid and disturbed weather over the western three-quarters. In contact with the cold air, a risk of snow in the plains persists in the center and northeast.
Week of November 24 to 30: winter weather forecasts in Europe, the cold persists locally with frequent showers. Temperatures rise slightly but remain below normal. Monday 24/11, highs stabilize (13 °C in Marseille, 12 °C in Bordeaux, 7–8 °C in Paris/Strasbourg/Lille/Lyon). Tuesday 25/11 and Wednesday 26/11: very cloudy sky, scattered showers, persistent cold in the east (2 °C in Bourg-Saint-Maurice on Tuesday). Thursday 27/11: sun gaining in the southern three-quarters and increase in the northwest (13–14 °C in Cherbourg and Brest). Weekend 29–30/11: Saturday gray and slightly milder in the east; Sunday clearer, sunny in places, with still cool temperatures in the east.
Forecasts beyond a few days carry uncertainty; they are subject to change depending on the trajectory of disturbances and thermal contrasts.
Why this return of winter?
After a brief episode of mildness from the south, a polar air descent has settled over the country. This air mass conflict explains the sudden drop in temperatures, and it also causes the appearance of snow. Indeed, this snow appears at very low altitude. Meanwhile, the resumption of a westerly flow brings Atlantic disturbances that clash with the cold continental air: the mix results in freezing rain, rain and snow mix, or snow depending on the regions and times. The relief accentuates the phenomenon, as the exposed slopes and plateaus retain the cold air. Thus, it often favors the accumulation of 15 to 30 cm in the mid-mountains. Additionally, a wind reaching 60 to 80 km/h at altitude contributes to this phenomenon.
The meteorological vigilance system is managed by Météo-France, which publishes updated maps. Moreover, it specifies the risk levels by department.
Public services and crisis management: what changes
Upon activation of alerts, prefectures mobilize departmental operational centers and coordinate SDIS, departmental roads, and law enforcement: targeted salting, diversion routes, caution messages. ORSEC plans frame these actions, with close monitoring of exposed areas (bridges, passes, shaded areas) and vulnerable populations (emergency accommodation, outreach, severe cold prevention).
At the municipal level, the mayor’s police can engage in snow removal, sanding, and signage to ensure safety and convenience of passage, in accordance with the General Code of Local Authorities (articles L2212-1 and L2212-2: Légifrance).
Transport and infrastructure: rail, road, schools
Rail: SNCF Réseau activates its Cold Weather Plan from December to March: pre-heating of switches, anti-icing operations, patrols, and adaptation of traffic as soon as a snow alert from Météo-France is issued (see: SNCF Réseau – Cold Weather). Objective: safety and continuity of the network, at the cost of slowdowns and revised schedules when necessary.
Road: Interdepartmental Directions and Bison Futé remind the rules: reduced speed, increased distances, smooth driving, chains/socks in equipment zones; see Bison Futé – Winter Driving. Heavy vehicle restrictions and temporary bans may apply locally.
Education: depending on road conditions, school transport is adapted or suspended in the most affected areas (e.g., Sault plateau), with reception maintained when possible.
Energy and networks: winter peak under surveillance
The cold increases electricity consumption (heating, domestic uses). RTE monitors in real-time the security of supply and publishes analyses and reports detailing margins and peak scenarios. If necessary, the Ecowatt signal may invite to shift certain uses during peaks.
Network managers (electricity, telecoms) anticipate frost and snowfall: reinforced on-call duty, site access, rapid repairs in case of incident.
Socio-economic issues: costs, mobility, continuity of services
Local authorities incur additional expenses (salt, sand, fuel, on-call duty), businesses adjust schedules and logistics, and some sectors (construction, retail, delivery) experience slowdowns. Conversely, depending on the snow weather, mid-mountain resorts benefit from an early start. However, this depends on secure access.
On the ground, the continuity of essential services relies on prefectural coordination. Moreover, this includes priority sectors such as emergency services, health, energy, and transport. Furthermore, communal information feedback is crucial. For individuals, the official guidelines remain: anticipate, equip, check the itinerary and road conditions.
What are the risks and for whom?
- Motorists: slippery roads, black ice patches in the early morning, especially on secondary roads, bridges, and shaded areas. Braking distances increase, loss of grip occurs at low speed.
- Pedestrians: icy sidewalks, dangerous steps and slopes. Falls are frequent in case of freezing drizzle.
- School transport: occasional cancellations may occur, as on the Sault plateau, when traffic conditions deteriorate.
- Mountain: avalanche risk in Savoie, Haute-Savoie, and Isère (yellow alert); caution when traveling to resorts.
- Vulnerable people: elderly, homeless, young children, outdoor workers must be particularly protected against the severe cold.
Practical advice for traveling and protecting yourself
- Before leaving: postpone or adapt non-urgent trips. Check the latest alert map on the Météo-France website. Check tires, battery, windshield washer fluid, antifreeze, and wipers.
- At the wheel: reduce speed, increase safety distances, avoid sudden maneuvers. Use a high gear when starting on slippery ground, brake gently. On icy roads, favor main routes.
- Equipment: in exposed areas, chains or socks may be necessary; keep in the vehicle a blanket, lamp, gloves, scraper, charger.
- On foot: prefer non-slip shoes, walk in small steps, hands free. Be careful on stairs and slabs.
- At home: heat reasonably, ventilate for a few minutes to limit humidity, monitor vulnerable neighbors. Protect sensitive objects from frost.
- Local information: consider prefecture bulletins and departmental road services.
These recommendations are of a general nature and do not replace the official instructions from authorities.
Key Figures of the Day
- 76 departments under yellow snow-ice alert.
- Seine-Maritime: active alert until 10 a.m., reactivation expected around 9 p.m..
- Rouen: 40 km/h gusts; Le Havre: 60 km/h.
- Highs: 8 °C in Le Havre, 7 °C in Rouen.
- Plateau de Sault (Aude): 15 cm in the village, 20 to 30 cm in Camurac, –5 °C felt.
- Aveyron: –9.1 °C in Alpuech, –9 °C in Brameloup and Laguiole.
- National trend (21/11): Ajaccio 14 °C, Nice 11 °C, Brest/Rennes/Nantes 10 °C, Gers 6–8 °C (trend), according to the weather in Gers, Paris and Lille 4 °C, Lyon 3 °C.
What to Watch in the Coming Days
- Saturday: widespread frosty morning, dry cold in the east, disturbance from the west. Beware of refreezing after clearings.
- Sunday: relative thaw from the west, rain and wind more present; risk of snow in the plains in the center and northeast at the contact with cold air.
- Next week: regular showers, persistent cold in places, more pronounced clearings in the south by Thursday, moderate increase in highs in the northwest.
In summary, France is entering an early and widespread cold snap. The combination of snow, ice, and wind requires cautious driving and constant vigilance. Additionally, it is essential to rely on official information updated in real-time.