O October should register from storms to heat waves throughout Brazilaccording to MetSul. Temporals begin to be more intense and frequent in the south-central Brazil as the season dries gradually to the end and increases moisture in the atmosphere.
Temperatures in much of the south center should be above or much above average. The junction of increased humidity with hot air favors the event of more storms.
Even with the increase in heat, a few dawn in October can be cold and present minimal near or below 10ºC in many cities in southern Brazil, but cold nights tend to be increasingly scarce.
Rainfall and storms
In the Southeast and Midwest, the combination of heat and moisture favors the occurrence of rainfall irregularly. It can rain a lot in a city and in the neighboring municipality does not rain. In addition, these areas will have greater propensity for thunderstorms, some strong to severe wind and hail.
The expectation is from near and below average rainfall. The exception is Mato Grosso and the coast of the state of São Paulo, which can record above average rainfall.
The month of October in the city of São Paulo marks the increase of the annual rain curve, which reaches its peak in summer with an average monthly precipitation of 127.2 mm at the Mirante de Santana station.
Last week, it rained much of Central Brazil due to an intense cold front. It is expected that new episodes of localized rainfall will take place in the region in October, especially in the second half.
October is one of the most stormy months of the year in the south of the country, due to the meeting of cold and hot air masses. Much of the region should record a rainfall volume near or above the average for the month.
The largest accumulated should take place in Rio Grande do Sul, especially in the north half, and part of Santa Catarina. In Porto Alegre, for example, October has an average historical precipitation of 153.2 mm. It is one of the highest monthly averages of precipitation in the state capital, only behind July, with 163.5 mm.
Heat wave
The south-central of Brazil must have a month of temperatures above or much above average. The states of Mato Grosso do Sul, Goiás, the interior of São Paulo, the northern Paraná and the Minas Gerais triangle should be the regions with the highest tendency of above average temperatures.
MetSul Meteorology projects in the Southeast and Midwest many days of excessive to extreme heat.
In southern Brazil the temperature should be above average. In Rio Grande do Sul, thermometers can get close to historical averages for the month. West, northwest and northern state with maxims in a few days near and above 40ºC.
Still, cold air masses still arrive in the state gaucho and bring a few nights of lower temperature. The frequency of these cold air masses should be increasingly smaller. There is low probability of intense cold.
*Under air supervision.
