28 Jul 2022 | 08:15 AM UTC
Oman: Adverse weather forecast across parts of the country through at least July 30
Heavy rainfall and thunderstorms forecast in parts of Oman through July 30. Disruptions due to flooding ongoing in northern governorates.
Event
Heavy rainfall and thunderstorms are forecast to continue across parts of Oman through at least July 30. Thunderstorms may be accompanied by strong wind gusts, lightning, and possible hailstorms. Heavy downpours could trigger flash flooding in dry river beds, as well as flooding in some low-lying and urban areas.
Oman's Directorate General of Meteorology has forecast a possibility of isolated heavy rainfall and thunderstorms over the Al Hajar mountains July 28-30, as well as intermittent showers over coastal areas of Dhofar and adjoining mountains. Fog and rough seas are expected in coastal areas and dust storms are possible in desert areas.
Heavy rainfall has been affecting northern governorates since July 26 and has triggered flash flooding in some areas. The Royal Air Force of Oman evacuated 134 people from the Lima area of Madha in Musandam Governorate July 27 after they became trapped in their homes due to overflowing valleys. Two people had to be rescued from their vehicle in the Shinas area of Al Batinah North Governorate and one fatality was reported after a person was swept away by an overflowing stream in the Nizwa area of Al Dakhiliyah Governorate.
Hazardous Conditions
Sustained 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 the soil has become saturated by heavy rainfall.
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 levels of dust without rain.
Transport
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 cancellations at airports in the affected areas. Authorities may temporarily suspend port operations or close beach fronts along the Arabian Sea and Oman Sea coats if strong winds trigger hazardous sea conditions. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas that see 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.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments prior to travel. Make allowances for localized travel delays, as well as potential supply chain disruptions, where flooding has been forecast. Do not drive on flooded roads. Charge battery-powered devices in the case of prolonged electricity outages.
