Saudi Arabia: Severe weather forecast across southwestern provinces through at least Jan. 12

Adverse weather conditions, including heavy rainfall, thunderstorms, and strong winds, are forecast across much of northern and western Saudi Arabia through Jan. 12.

The National Center for Meteorology has issued the following weather warnings as of Jan. 11:

• Red heavy rain and thunderstorm warnings (the highest level on a three-tier scale): Parts of northeastern Al Bahah, southwestern Mecca, and northern Aseer provinces.

• Orange heavy rain and thunderstorm warnings: The rest of Al Bahah, much of the rest of Mecca, and eastern Jazan provinces.

Less severe yellow warnings are in place for other central areas of the country.

Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

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). Moderate winds and dust storms may precede significant rainfall, though some areas - particularly desert areas - may experience high dust levels without rain. Transport disruptions are possible due to associated reduced visibility. Landslides are possible in hilly or mountainous regions, especially where heavy rainfall has saturated the soil.

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

The severe weather could contribute to transport disruptions throughout the affected area. Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Traffic and commercial trucking delays might occur along regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters. Hazardous weather conditions might cause flight delays and cancellations at regional airports.

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.