Weather Alert: Low Pressure System to Bring Rain Across Oman

The Civil Aviation Authority (CAA) of Oman has issued a comprehensive weather alert regarding an approaching atmospheric trough that is expected to bring varying intensities of rainfall across multiple governorates from December 28 to 30, 2025. The National Multi-Hazard Early Warning Center has been monitoring the system's development and advises residents to take appropriate precautions.

System Overview

The low-pressure system is approaching from the northwest and will influence weather patterns across the Sultanate over a three-day period. According to CAA forecasters, "conditions may become thundery at times during the peak of the system," indicating the potential for significant weather events in affected areas.

Initial Impact Areas

The first effects of the weather system are expected in Musandam Governorate on Sunday evening, December 28. This northernmost region of Oman, known for its dramatic fjords and mountain terrain, faces particular risk from the approaching system. Rainfall amounts in Musandam are projected to reach between 5 and 10 millimeters during the initial phase.

Progression and Coverage

Following the initial impact on Musandam, the system is forecast to progress through Monday and Tuesday, bringing precipitation to northern governorates and the Arabian Sea coastal areas. The exact rainfall amounts will vary by location, with some areas potentially receiving more significant accumulations.

Additional Weather Hazards

Beyond rainfall, the weather system brings several associated hazards that residents should monitor. Active northwesterly winds accompanying the system are expected to trigger dust across parts of the country, potentially reducing visibility and affecting outdoor activities. Significant temperature drops are also forecast nationwide as the cooler air mass associated with the low-pressure system moves across Oman.

The combination of rain and wind creates heightened risk of wadi flows, particularly in Musandam and other mountainous regions. These flash flood-prone channels can rapidly fill with runoff from hillside precipitation, posing dangers to motorists and residents near wadis.

Safety Recommendations

While the CAA alert does not include specific safety directives, standard precautions for such weather events include avoiding wadi crossings during and after rainfall, securing outdoor items that could be affected by wind, and staying informed through official weather updates. Motorists are advised to exercise caution on roads that may become slippery or affected by reduced visibility.

Context

This weather event comes as Oman enters its winter season, which typically brings periodic rainfall systems from the Mediterranean and Arabian Sea. Such precipitation is generally welcomed for its contribution to groundwater recharge and agricultural irrigation, though the associated hazards require public awareness and preparedness.