Turkey: Adverse weather forecast across much of the country through at least Dec. 1

Event

Thunderstorms, heavy rainfall, strong winds, and possible flooding are forecast across many parts of Turkey through at least Dec. 1. As of Nov. 29, the Turkish General Directorate of Meteorology has issued orange-level weather warnings (the second-highest on a four-tier scale) for strong winds across all except the southeast of the country, as well as widespread yellow-level warnings for thunderstorms. Additional meteorological warnings have been issued for storms and strong winds in the Mamaras, Agean, Central Anatolia, and Western Mediterranean regions, as well as parts of the Eastern Mediterranean, Black Sea, and Eastern Anatolia regions. Marine weather warnings have also been issued due to the storms. Officials could update and possibly extend the coverage of the relevant weather alerts over the coming days.

Winds of up to 130 kph (81 mph) were recorded in Istanbul on Nov. 29. Significant disruptions occurred at Istanbul Airport (IST) and to a lesser extent at Sabiha Gökçen International Airport (SAW). Reports indicate the adverse weather caused four fatalities and 13 injuries in Istanbul as of Nov. 29, as well as damage to boats and roofs of buildings. Traffic and maritime transportation disruptions were also reported in the Istanbul area, with the Bosphorus shipping channel closed in both directions.

Hazardous Conditions
The storms could produce rounds of heavy precipitation, strong winds, and isolated thunderstorm activity across much of Turkey. Sustained heavy rainfall could trigger additional flooding in low-lying communities near rivers, streams, and creeks. Further 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. Disruptions to electricity and telecommunications services may occur where significant flooding, landslides, or strong winds impact utility networks.

Transport
The severe weather will likely contribute to transport disruptions throughout the region. Traffic and commercial trucking delays might occur along regional highways. Flooding downpours could inundate some low-lying roads in areas with poor drainage. Severe weather could also trigger flight delays and cancellations at regional airports. Authorities may temporarily suspend port operations or close beach fronts along coastlines 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

Confirm flights. Monitor local media for updated emergency and weather information. Seek updated information on weather and road conditions before driving or routing shipments through areas where severe weather is forecast. Plan accordingly for potential delivery delays if routing shipments by truck through the affected area. Do not attempt to drive through flooded areas. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

General Directorate of Meteorology (Turkish)