The weather forecast announced up to 18 degrees in the center this Wednesday. Finally, we are far from the mark. This afternoon the IRM meteorologist David Dehenauw admitted that the thermostat indicated 5 degrees less than the 19 maximum he had predicted. “I had reasonably well estimated the cloudiness, but the temperatures absolutely not”he shared on Twitter.
In another publication, he was surprised to “never have seen this in his career”.
However, he explained it by the passage this Wednesday of the cloud of sand from the Sahara over our country (which explained the yellowish color of the sky today). “There can be so much sand in the sky that not only is the optical density of clouds greater (meaning less sun can shine), but also more clouds are encouraged to form,” David explained. Dehenaux on Twitter. Result: “Temperatures are about 5 degrees lower than forecast.” This is exceptional because during such events, the expert explains that weather computers (and therefore meteorologists) take into account the average concentration of sand in the air. And with the latter, “previous studies indicate differences of plus or minus 1 degree”.
For the scientist, these observations thus provide food for thought for many scientific discussions. He concludes in a lighter tone: “The meteorologist proposes, nature disposes!”