A cold Arctic wave is descending unexpectedly toward the Balkans. Temperatures will fall 10-15 degrees below seasonal averages - just when farmers thought spring was secure. Vineyards and orchards are in full growth, with open leaves and ripe buds - and now frost is coming.

Meteorological service "Severe Weather Europe" describes the event in rare terms: an Omega blockade over the North Atlantic and Greenland is redirecting Arctic air masses directly toward Europe. The La Niña effect in the Pacific amplifies the cyclone. Result: Eastern Europe under ice, Western Europe under sun. The Balkans sit precisely at the boundary between the two.

Thursday, Friday, and Saturday mornings will be critical. Temperatures at higher elevations will drop below zero. For vineyards in Macedonia, Serbia, Bulgaria - agronomists know what frost means for flowering plants already in bloom: the damage can be "significant, even catastrophic," write the meteorologists.

Such May-level frost is extremely rare and does not appear in normal climate models. If farmers do not take protective measures in the next 48 hours - protective covers, anti-frost irrigation - this year's harvest could be significantly reduced. The state, in such situations, typically responds only after damage has been assessed.