21 Apr 2023 | 09:06 AM UTC
Mexico: Adverse weather forecast over eastern, northeastern, and southeastern regions through at least April 24
Severe weather forecast across eastern Mexico through at least April 24. Possible flooding and associated disruptions.
Event
Severe weather is forecast across much of the eastern half of Mexico through at least April 24. A cold front will remain largely stationary over northern and northeastern Mexico over the coming days, bringing heavy rainfall accompanied by thunderstorms and possible hail storms across the affected regions. Rainfall totals of 5-7.5 cm (2-3 inches) are forecast over parts of Tamaulipas April 21-23, Nuevo Leon April 21 and 23, Puebla, San Luis Potosi, and Veracruz April 21-22, Oaxaca April 22 and 24, and Chiapas, Tabascao, and Veracruz April 24. Heavy downpours could trigger flooding in low-lying areas and landslides on unstable slopes in the affected areas. Strong winds are also expected across much of the region, with gusts of 80 kph (37-43 mph) accompanied by possible tornadoes in Nuevo Leon and Tamaulipas on April 21. Winds gusting 40-70 kph (25-43 mph) are forecast over most of the rest of the affected area over the coming days, with dust storms possible in arid parts of northeastern Mexico.
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 heavy rainfall 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.
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.
The disruptive weather will likely cause delays and cancellations at regional airports. Authorities may temporarily suspend port operations if strong winds trigger hazardous sea conditions, impacting freight and passenger maritime traffic. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas that see heavy rainfall and potential track blockages.
Disruptions triggered by inclement weather and resultant hazards, such as flooding, could persist well after conditions have improved - it could take days before any floodwaters recede and/or officials clear debris. Repair or reconstruction efforts may result in residual disruptions if there is severe damage to infrastructure.
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.
