Bom Dia displays photos of viewers Paraná dawned with frost and negative temperatures in the southern region this Wednesday (17). According to the Environmental Technology and Monitoring System (Simepar), the lowest temperature recorded in the state was -1.1ºC, in General Carneiro. The formation of layers of ice on surfaces was already expected and, according to Simepar, on Thursday (18) there is still the possibility of light frosts in the Center-South of the state. See weather forecast by region below. ✅Follow the g1 PR channel on WhatsApp Frost this Wednesday (17) in Palmas, Paraná Silvio Junior Mendes Meteorologist Samuel Braun explains that the drop in temperatures is due to a mass of polar air with cold and dry air that is acting over Paraná, mainly in the regions closest to Santa Catarina, where thermometers fell below 5ºC in several cities. Many municipalities dawned with fog - at São José dos Pinhais airport, in the metropolitan region of Curitiba, for example, takeoffs were temporarily suspended between late dawn and early morning due to the intensity of the fog. However, explains the meteorologist, the fog quickly lost strength and the tendency is for Wednesday to have a predominance of sun and more pleasant temperatures in the afternoon. Frost: What is it and what conditions are necessary for the formation of the phenomenon? Frost this Wednesday (17) in Palmas, Paraná Silvio Mendes Thursday (18) should be similar, with the possibility of light frosts in the extreme south of Paraná and stable weather throughout Paraná. However, on Friday (19) the weather changes, due to the advance of a cold front that is expected to cause rain. "There will be a greater possibility of storms between the northwest, west, southwest and central-south, between the dawn, late dawn and especially in the morning. In the north, Campos Gerais and the east, the change occurs between the afternoon and evening on Friday", says Braun. Frost this Wednesday (17) in General Carneiro, Paraná Ana Maria Mello Jekel Also read: Behind bars and dressed in pink: The story of the nuns of 'perpetual adoration' who live cloistered in Paraná Agreement: Farmer who kept elderly couple in modern slavery for 20 years will pay R$70,000 to victims Car fell into river: Man misses work, colleagues go looking for him and find him dead Frost this Wednesday (17) in Guarapuava, Paraná Eduardo Andrade/RPC Weather forecast for Paraná See below the weather forecast updated this Wednesday (17) by Simepar: Wednesday, June 17th Wednesday, June 17th Reproduction/Simepar Thursday, June 18 Thursday, June 18 Reproduction/Simepar Friday, June 19 Friday, June 19 Reproduction/Simepar Most watched videos from g1 Paraná: Read more news on g1 Paraná