Heavy rains, landslides and floods: the possible effects of tropical storm “Iota” in Mexico

(Photo: Conagua Clima / SMN)

The National Weather Service (SMN) of the National Water Comission (Conagua) issued a special notice in which it was reported that “a rainy storm that will be occurring in the Mexican southeast during the next few days. That will be in principle for the Cold front number 13 and by the interaction with the remnants that they have with the tripical storm Iota ”.

The meteorological phenomenon known as Iota made landfall off the coast of Nicaragua as a Category 4 hurricane on the Saffir-Simpson scale. Subsequently, it weakened a tropical storm (category 3), and it moved west, affecting the Central American region. The dissipation process is expected to begin on Wednesday, November 17. However, the entire Moisture generated by the tropical storm will begin to move from Central America to the Mexican southeast, generating heavy rains in the region.

The aforementioned interaction of the Cold Front No. 13 and the remnants of humidity generated by Hurricane Iota will have notorious and serious consequences in the climate of various regions of the Mexican Republic.

They wait Torrential rains (between 150 and 250 millimeters accumulated) today in the region adjacent to the border between Veracruz and Oaxaca and in the south of the first mentioned state. In Chiapas, Puebla and Tabasco are predicted heavy rains (de 75 a 150 mm); Very strong (50 to 75 mm) in Campeche; Y powerful (25 to 50mm), in Quintana Roo and Yucatan. The heavy rains are expected to continue until Friday, November 20. In its official Twitter account, SMN alerts the population about the possibility of heavy rains causing landslides and floods in the mentioned areas.

Floods seriously affect the state of Tabasco.  (AP Photo / Felix Marquez)

Floods seriously affect the state of Tabasco. (AP Photo / Felix Marquez)

A cold environment with frosts is forecast at dawn in the north, center and east of Mexico. There will possibly be snowfalls on the tops of the eastern mountains of the country whose height is greater than 4,200 meters; that is to say, in Cofre del Perote, the Sierra Negra and the Pico de Orizaba. It is estimated that there will be thermal minimums of -5 ° to 0 ° Celsius and frosts in the mountains of the State of Mexico, Zacatecas, Tlaxcala, Nuevo León, Hidalgo. Puebla and Veracruz.

The SMN expects that winds of 90 to 100 kilometers per hour and a three to five meter high swell in the Isthmus of Tehuantepec ). On the beaches of Quintana Roo and Veracruz, winds of 60 to 70 kilometers per hour and waves of two to three meters high are predicted.

The accumulated water totals will be particularly high in the area comprised by the limits of Oaxaca and Veracruz, Chiapas and Tabasco. It is estimated that these could exceed 350 mm.

OSTUACÁN, CHIAPAS, 08NOVEMBER2020.- Images of the venting of the Ángel Albino Corzo “Peñitas” Dam, which has caused the rise of several rivers in the Mexican southeast causing flooding in communities of Tabasco. In the afternoon, the Chief Executive Officer, Andrés Manuel López Obrador, pointed out that the water levels in this dam were already stabilizing, so no further release of water would be necessary. PHOTO: PRESIDENCIA / CUARTOSCURO.COM

Probably the most serious social consequences of this interaction of meteorological phenomena will take place in the states of Tabasco, Campeche and Chiapas. Regions whose coastlines have already been overwhelmed by heavy rains caused by cold fronts 9 and 11. A report released by the National Coordinator of Civil Protection Laura Velázquez Alzúa reported that it is estimated that on November 9 there was 184, 191 victims and 27 people dead as a consequence of the rains and floods. This number continues to grow.

The SMN urges the population to stay informed about weather conditions through the internet pages www.gob.mx/conagua Y https://smn.conagua.gob.mx, on the Twitter accounts @conagua_mx and @conagua_clima, and on Facebook www.facebook.com/conaguamx, as well as in the application for mobile devices ConaguaClima, where you can check the forecast by municipality ”.

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