The movement of cold front 45 over the northeast and the coast of the Gulf of Mexico generates a drastic thermal drop, electrical storms of up to 75 mm and alerts for tornado formation in Coahuila, Nuevo León and Tamaulipas this Sunday, April 19, 2026.
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Highly dangerous meteorological impact in national territory
The interaction between cold front number 45 of the 2025-2026 season, a polar air mass and a low pressure channel has configured a scenario of severe instability. This phenomenon is currently crossing the northeast of the country and the coast of the Gulf of Mexico, causing a drop in temperatures and gusts of wind that compromise security in various regions.
- Precipitation and thunderstorms: Very heavy occasional rains are anticipated, with accumulations of up to 75 mm, in the states of Tamaulipas, Hidalgo, Oaxaca, Puebla and Veracruz. These conditions are accompanied by constant electric shocks and the latent risk of hail falling in the northeast and center of the territory.
- Cold and frost environment: The high areas of the mountains in Chihuahua and Durango register minimum temperatures that range between -5 and 0 °C. This cooling extends to the north, center and east, where the cooling of the environment is notable.
- Extreme atmospheric instability: The collision of air masses of different densities causes the formation of whirlwinds or tornadoes in Coahuila, Nuevo León and Tamaulipas.
Epidemiological and logistical surveillance of the National Meteorological Service
The National Meteorological Service (SMN) maintains permanent monitoring of the federal entities that present greater risks due to flooding, flooding or severe wind phenomena. The distribution of alerts is divided by strategic geographic areas:
- Northeast of the country: Coahuila, Nuevo León, San Luis Potosí and Tamaulipas are under alert for winds and rains.
- East and Southeast: Veracruz, Hidalgo, Puebla, Oaxaca and Chiapas face the highest volume of precipitation.
States at risk of flooding due to heavy rains
- Veracruz: Critical effects in the northern and central regions.
- Tamaulipas: Strong incidence in the northeastern area of the state.
- Puebla, Hidalgo and Oaxaca: High risk in its mountain and northern sectors.
Monitoring of vortices and minimum temperatures
The atmosphere presents instability that requires close monitoring in the north of Coahuila, the center and north of Nuevo León, and the northwest of Tamaulipas. Simultaneously, the polar air impacts with frost in the mountainous areas of Chihuahua, Durango, Sonora and Baja California. Other states such as Chiapas, San Luis Potosí, Querétaro, Tlaxcala, Jalisco, Michoacán and Guerrero will experience rains and showers of lower intensity but of a relevant nature for civil prevention.
Climatic duality: The contrast between the cold and the heat wave
While the north and east of the country manage the ravages of cold front 45, states such as Sinaloa, Nayarit, Morelos and Guerrero are immersed in an aggressive heat wave. In these entities, maximum temperatures reach 45 °C in their warmest regions, evidencing an extreme climatic division in the national geography.
Detailed forecast by major cities
Monterrey (Zone of instability)
The capital of Nuevo León registers a maximum of 24°C and a minimum of 16°C. The collision of the cold mass with the accumulated heat increases the probability of thunderstorms to 70%, with gusts of wind of 70 km/h that could lead to whirlwinds in peripheral areas.
Mexico City (Thermal transition)
In the capital, a maximum of 29°C and a minimum of 14°C are expected. Although the atmosphere will be hot at noon, showers with hail are forecast between 4:00 p.m. and 8:00 p.m. due to the entry of humidity. The use of morning sun protection and evening umbrellas is recommended.
Guadalajara (Extreme heat)
Under an anticyclonic circulation, Guadalajara reaches 36°C with no probability of rain. UV radiation levels are critical, so it is vital to avoid direct sun exposure between 11:00 a.m. and 4:00 p.m.
