Oman: Adverse weather forecast across much of the country through at least Aug 7

Severe weather is forecast across much of Oman through at least Aug. 7. Thunderstorms are expected over the Al Hajar Mountains and adjacent areas; storms will be accompanied by heavy downpours, strong winds, and possible hail. The Civil Aviation Authority's Directorate General of Meteorology has issued warnings for thunderstorms and strong winds with dust storms in these areas Aug. 5. Rainfall totals of 2.5-5 cm (1-2 inches) and winds gusting up to 83 kph (52 mph) are possible in the region, with the worst of the severe weather likely over parts of Ad Dakihiliyah, Al Batinah North, Al Batinah South, and Muscat governorates. Intermittent showers and isolated thunderstorms are also forecast in coastal areas of Dhofar Governorate and fog is possible in areas along the Arabian Sea and Oman Sea coasts. Strong winds may generate dust storms in desert areas and rough seas along the coast. Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming hours and days.

Heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where heavy rain has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

Due to the arid nature of the region and poor stormwater management in some urban areas, even minor rainfall accumulations could quickly result in episodes of flash flooding. Flooding is possible in streams and wadis (dry riverbeds). Significant rainfall may be preceded by moderate winds and dust storms, though some areas - particularly desert areas - may experience high dust levels without rain.

Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.

Severe weather could also trigger flight delays and cancelations at airports in the affected areas. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas with heavy rainfall and potential track inundation.

Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.