Rare April freezing rain in Brazil

In addition, yesterday afternoon was the coldest ever recorded in April with a maximum of only 8.8 ° in Sao Jose dos Missing.


Rare April freezing rain in Brazil

By Professor Eugenio Hackbart

Residents of Morro Grande, São José dos Missing, reported that at 10am on Monday there was rain for about a minute of white ice grains (granular snow).

This was verified by the MetSul Meteorology, whose survey indicated freezing rain in Bento Goncalves, Caxias do Sul, San Marcos High Happy, Cinnamon, Capon Beautiful South, Ipe and Vacaria, San Joaquin in Santa Catarina, and possibly in Aparados and Serra Gaucho.

In the case of freezing rain, which looks like a kid sleet, precipitation leaves the cloud like snowflakes on a cold portion of the atmosphere. Then it goes through an intermediate layer of warmer air, but because it is not thick enough, it just melts part of the flakes. Before reaching the surface, however, the flakes are melted by a new layer of cooler air and they freeze yet again, precipitating in the form of ice.

The conditions were thus very conducive to the occurrence of winter precipitation (snow or freezing rain) with cold air temperatures and negative between 1500 and 2000 meters altitude, and the presence of a trough (an area of ​​lower pressure) on the River Grande do Sul and Santa Catarina. It is one of the classic models for snow in southern Brazil: a continental high-pressure trough or cyclone ensuring moisture flow.

http://www.metsul.com/blog2012/
Thanks to Sergio for this link


9 thoughts on “Rare April freezing rain in Brazil

  1. I have a question on something I believe I read here on this web-sight a few years ago. Seams to me I read that during the onset and even during an iceage, the southern US would not notice much of a difference in our weather. If I’m wrong someone please correct me. I’ve been looking forward to a little cool weather down here in the south, maybe like what we used to have during the 1970s. So I hope I’m wrong. I hope we see some sort of a change in our weather in the next few years, even down here.

    • The ice age map shows the southern portion of the US to be ice free, but it doesn’t imply that the weather is not going to be cooler. In fact, with the Arctic tundra moving as far south as say southern Canada, it would require that the southern states would have a climate similar to the one now experienced in the prairie states, I would expect, as a minimum. True, the Gulf of Mexico would help keep it somewhat warmer, just as the Gulf Stream does for the United Kingdom and western Europe, but I don’t think there would be enough “heat” to offset the cold winds pulling down out of the Rockies and down across the plains. If the cold winds are coming, better buy that down parka. Of course, with all the bodies moving down out of the northern states, maybe the body heat will help keep the cold at bay as well.

    • At the beginning of an Ice Age I believe the weather would become similar to what it was during the Maunder minimum, which is the closest we have had so far of a full glaciation in the present interglacial.
      The early 1970’s were warmer than this.
      We could reach this level very quickly, 1-2 decades or even faster, depending on what triggers the entire process.
      After this initial change things would go slower and oscillations would occur, with decreasing average temperatures century, after century… In our lifetimes I’m expecting no more than Maunder minimum conditions, IF the Ice Age comes.

      • I appreciate the responses to my question and have one more in regards to a comment that F. Guimaraes made. You stated that at the beginning of an Ice Age the weather in the Deep South could become similar to what it was during the Maunder minimum. Well, could you explain what that might be down here, maybe as far south as Houston Texas or New Orleans? I really don’t know where to find any information on this subject, but interested in what you might know. Thanks.

        • From an earlier post of Mr. Felix’s.

          Robert says:
          May 1, 2012 at 8:13 pm
          During the last ice age the climate of Chicago essentially moved to Georgia.

          Reply

  2. The winter and summer is not linear or in phase with the 11 year sun cycle. So one can go and check back in history. Where the winter fell on the sunspot lowest trend, one will experience quite a cold winter. Then where one’s winter falls then say on the cycle max, it would be a warm winter and the same applies to the summer. What will happen it appears looking at the current trend, that we will have short and warm summers and deep winters but for how long nobody knows. The fact of the matter is that cycle 24 is nowhere close to what it should have been and turning downwards!Nowadays they have all these special equipment to read sunspots etc. But to get more or less the same reading as dalton or maunder, one should really look at the sun with a 16th century telescope and through a piece of smoked glass and I bet you the trend will look different.

  3. Forget The Floods And Get Ready To Shiver

    After a mini heatwave and the wettest April on record, now parts of Britain are braced for a taste of some wintry weather.
    Forecasters say it will be turning much colder as we head towards the weekend, with some areas seeing unseasonable frost and sub-zero temperatures
    http://news.sky.com/home/uk-news/article/16220251

  4. Nothing out of extraordinary in this news. And anyway, southern Brazil saw much colder days in the 19th century. There are registers, made by german european immigrants, of blizzards and up to 2 meters deep snow accumulation, burying cattle, around 1860 and 1870…

    Snow fall in southern Brazil has steadily decreased in the 20th century.

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