07 Oct 2022 | 08:49 AM UTC
Brazil: Adverse weather forecast across central, northeastern, northwestern, and southern regions regions through at least Oct. 11 /update 1
Severe weather forecast across multiple regions of Brazil through at least Oct. 11. Flooding, landslides, and disruptions possible.
Event
Thunderstorms, heavy rainfall, and strong winds are forecast across parts of central, northeastern, northwestern, and southern Brazil through at least Oct. 11. Storms may be accompanied by strong wind gusts, lightning, and possible hail. Heavy downpours could trigger flooding and landslides and strong winds could cause property damage and trigger power outages in affected areas.
As of early Oct. 7, Brazil's National Institute of Meteorology (Inmet) has issued the following weather warnings across the affected area:
Orange warning for storms (middle level on a three-tier scale): Parts of southern Goias, southern Mato Grosso, Mato Grosso do Sul, southwestern Minas Gerais, far northern Parana, far western Rio de Janeiro, and Sao Paulo states. Between 3-6 cm (1-2 inches) of rain per hour or 5-10 cm (2-4 inches) of rain per day and winds of 60-100 kph (37-62 mph) are forecast in the orange warning areas.
Orange warning for coastal winds: Across the coast of Rio Grande do Sul.
Yellow warning for heavy rainfall: Parts of Acre, northern and western Amazon, central and northwestern Goias, central and northern Mato Grosso, central, southern, and western Minas Gerais, southern Para, far southeastern Paraiba, central and northern Parana, eastern Pernambuco, eastern Rio Grande do Sul, southeastern Rondonia, western Roraima, southeastern Santa Catarina, and southwestern Tocantins. Between 2-3 cm (0.8-1.2 inches) of rain per hour or up to 5 cm (2 inches) of rain per day and winds of 40-60 kph (25-37 mph) are forecast in the yellow warning areas.
Yellow warning for coastal winds: Across the coast of Rio de Janeiro.
Officials could update and possibly extend the coverage of the relevant weather alerts over the coming days. Further showers and storms are forecast over parts of the affected area through at least Oct. 11.
Hazardous Conditions
Sustained heavy rainfall could trigger further flooding in low-lying communities near rivers, streams, and creeks. In developed areas with easily overwhelmed stormwater drainage systems, additional urban flooding is also possible. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides remain possible in hilly or mountainous areas, especially where heavy rainfall has saturated the soil. Power outages and disruptions to telecommunications services are likely where significant flooding, landslides, or strong winds impact utility networks.
Transport
Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel in 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 intermittent flight delays and cancellations at airports in the region, though these are unlikely to be severe or prolonged. Authorities may temporarily suspend port operations or close beach fronts along the affected parts of the southeast Atlantic coast if strong winds trigger hazardous sea conditions. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas that see heavy rainfall and track inundation. Localized business disruptions may occur in low-lying areas.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments before travel. Make allowances for localized travel delays and 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.
