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Cold Front No. 19 and low-pressure channels will cause severe conditions across a large part of the country, with the highest intensity of rainfall concentrated in the eastern and southeastern parts of Mexico, according to the National Meteorological Service.
Lunes 8 de Diciembre: Primeros Impactos
On Monday the 8th, Cold Front No. 19 will enter the north and northeast of Mexico, driving a marked drop in temperature. Showers with localized heavy rains (25 to 50 mm) are expected in regions of San Luis Potosí, Querétaro, Hidalgo, Puebla, Veracruz, Oaxaca, Chiapas, Tabasco, Campeche, Yucatán, and Quintana Roo.
The associated polar air mass will cause a strong 'Norte' event, with high waves on the coasts of Tamaulipas and northern Veracruz. The most extreme minimum temperatures will be recorded in the mountainous areas of Chihuahua and Durango, with values of -10 to -5 °C and frost.
Martes 9 de Diciembre: Lluvias Intensas y “Norte” Fuerte a Intenso
On Tuesday the 9th, Cold Front No. 19 will move rapidly over the Gulf of Mexico coast. This day will be critical for the southeast, with a forecast of very heavy rains with localized intense rainfall (75 to 150 mm) in areas of Puebla (Northern and Northeastern Sierra), Veracruz, Oaxaca (north and east), Chiapas (north and east), and Tabasco (south).
The polar air mass will maintain a cold to very cold environment in the north, northeast, east, and center of the territory. In addition, a strong to intense 'Norte' event will occur with gusts of 80 to 100 km/h in Veracruz and the Isthmus and Gulf of Tehuantepec (Oaxaca and Chiapas), generating waves of 2.5 to 3.5 meters in height on the coasts of Tamaulipas and Veracruz, as well as in the Gulf of Tehuantepec.
Miércoles 10 y Jueves 11 de Diciembre: Desplazamiento del Frente y Ascenso de Temperaturas
On Wednesday the 10th, frontal system No. 19 will remain stationary over the Yucatán Peninsula, maintaining the probability of rain and showers in that region. The polar air mass will begin to modify, leading to a gradual rise in temperatures during the afternoon in the north and northeast of the country.
On Thursday the 11th, the front will move toward the Caribbean Sea, ceasing to directly affect Mexico. However, low-pressure channels and moisture inflow will continue to generate intervals of showers (5 to 25 mm) in the west, center, and south, including Tlaxcala, Puebla, Veracruz, Oaxaca, Guerrero, Chiapas, and Tabasco.
It is important to note that throughout the period (December 8-11), maximum temperatures in Pacific regions such as Sonora, Sinaloa, Nayarit, Jalisco, Colima, Michoacán, Guerrero, and Oaxaca will remain high, reaching 35 to 40 °C.
Fenómenos meteorológicos causantes del clima extremo en México
The main factors responsible for these conditions are:
1. Cold Front Number 19 (F.F. No. 19): This system enters through the north and moves rapidly over the Gulf of Mexico.
2. Polar Air Mass: It pushes the front and is the direct cause of the marked drop in temperature in the north, northeast, east, and center of Mexico.
3. Trough and Jet Stream: The cold front interacts with a trough in the middle and upper levels of the atmosphere and with the subtropical jet stream, which intensifies instability and precipitation.
4. Low-Pressure Channels and Moisture: These systems, in combination with the inflow of moisture from the Pacific Ocean, the Gulf of Mexico, and the Caribbean Sea, are responsible for the rain and intervals of showers in the center, south, and southeast.
Important Warning: Intense, very heavy, and heavy rains may be accompanied by electrical discharges and have the potential to cause increases in river and stream levels, landslides, waterlogging, and flooding in low-lying areas. Additionally, strong wind gusts from the 'Norte' event could cause trees and advertising signs to fall.
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