AEMET has set an expiration date on Borrasca Harry. But what’s coming from Greenland is about to begin
On January 17 and 18, AEMET issued a series of special warnings due to a Mediterranean storm that has been causing problems in the Balearic Sea for days. But, in those notices, there was something else: a problem. And no, it’s not just that we are going to the most unstable week of what we have had in winter. And then? In those noticesAEMET describes a blocking pattern that was elongating a trough and favoring a retrograde DANA. That was Harry, a high-impact storm forming in the Mediterranean (and already is leaving snow near the coast). According to AEMET estimatesthe accumulations can be on the order of 200 liters in 48 hours in the Girona area and more than 20 centimeters of new snow in southeastern Iberian. But Harry ends tomorrow and that’s where the problems begin. The jet returns. Because, in parallel, the anticyclonic blockade between Greenland and the Scandinavian peninsula will interrupt the zonal flow and force the polar jet to lower latitude. In fact, it will descend so much that it will focus directly on Spain, guiding fronts and cold masses from the north. Or, rather, we are talking about cold advection with synoptic trajectories. These models still lack consistency, of course: but the models and outputs are converging in this scenario. What should we expect? Right now, the point of greatest risk It is the Mediterranean coast. Although Harry already has an expiration date, it is a storm that can be very intense locally and can cause problems in short basins (with rapid floods). Not to mention the difficulties at the coastal level and the gusts of wind. Then, if we are a little lucky, it will be reactivated.Atlantic storm machine and a train of storms will begin to enter from the west. If we are unlucky, the cold will return. But, well, at the gates of February it is still within what is expected. Image | ECMWF In Xataka | After the cold comes something much more problematic: the explosive cyclogenesis that AEMET predicts for the Mediterranean