Fog is no longer an uncommon phenomenon in the region, and winter now arrives with more than just cooler evenings. In the UAE, a dense white curtain increasingly blankets roads, airports, and open areas, reducing visibility and creating challenges for daily life. As a result, security services frequently issue warnings to drivers and residents, emphasizing the importance of caution and preparedness during these low-visibility conditions.
How The Desert And The Sea Create Fog
At first glance, it seems that a dry desert and fog are incompatible, but the combination of radiation cooling of sand, sea breeze and steam-saturated air turns the country into a natural laboratory of fog formation. After sunset, the surface of the desert cools down quickly, cooling the lower layer of the atmosphere, where moist air has accumulated, brought in during the day from the warm waters of the bay. When the temperature drops and humidity reaches a maximum, water vapor condenses on dust and sand particles, forming a radiation fog, which accounts for about ninety-five percent of all foggy cases. The remaining few percent is accounted for by advection fog, which occurs when warm, humid air moves over cooler surfaces in coastal areas.
According to weather forecasters, such nights are repeated up to fifty times a year between autumn and the end of winter. Fog peaks from December to March, although the first streaks appear in September, when the nights get colder and humidity increases.
Fog Time: Hours Of Minimal Visibility
Fog rarely occurs in the middle of the day, it increases gradually, starting in the evening hours. Formation is possible after nineteen o’clock, but the most difficult sections for movement occur between three and seven o’clock in the morning, when visibility drops to a hundred meters or less in some places. By this time, relative humidity often reaches ninety percent, especially in low-lying areas.
The temperature background varies by region, but night cooling is felt everywhere. On the coast, daytime values range from about thirty to twenty–six degrees, dropping to twenty-two to seventeen at night; in inland areas, up to thirty-three degrees are possible during the day, while the air cools down to about twelve at night; in mountainous areas, about twenty–five to nineteen degrees during the day. This cooling contributes to the fact that the fog is retained until late in the morning and can persist up to eight, nine, and on some days up to eleven hours, until the sun warms the surface.
Roads, Safety And Driver Discipline
Fog immediately affects the traffic situation. On highways where traffic flows at high speed on normal days, traffic slows down to thirty to forty kilometers per hour on foggy mornings, and security services temporarily reduce the limits to eighty kilometers per hour. Visibility of one hundred meters or less turns each interchange into a risk zone, so drivers are advised to increase the distance, avoid sudden maneuvers and monitor electronic displays with current restrictions.
A separate problem is the habit of some drivers to turn on their emergency lights while driving through fog, trying to increase the visibility of the car. In practice, this makes the situation worse: others do not understand whether the car is turning on the turn signal, whether it is braking or just moving straight ahead. There is a fine of five hundred dirhams and four demerit points for improper use of the alarm system, but the main price is potential accidents that can be avoided with proper use of low beam and fog lights.
Fog, Logistics, And Daily Rhythm
Fog affects not only private drivers, but also the general rhythm of the country. Morning flights may be delayed due to low visibility, and cargo transport, event rental companies, and delivery services adjust schedules to avoid risking people and cargo. During this period, accurate forecasting is especially important: meteorologists use satellite observations and operational modeling to estimate when the fog will begin to thicken and by what time in the morning visibility will be acceptable again.
At the same time, the fog has a useful side. It brings moisture that is rare for a desert climate, cools the air slightly in the wee hours and reminds residents that even in a well-established urban environment, there are natural phenomena that require respect and discipline. Foggy days have become part of the winter season, and the ability to adapt to them has become a feature of the local everyday culture.
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