*Article* **Innovative Integration of Severe Weather Forecasts into an Extended Arrival Manager**

**Marco-Michael Temme 1,\*, Olga Gluchshenko 1, Lennard Nöhren 1, Matthias Kleinert 1, Oliver Ohneiser 1, Kathleen Muth 1, Heiko Ehr 1, Niklas Groß 1, Annette Temme 1, Martina Lagasio 2, Massimo Milelli 2, Vincenzo Mazzarella 2, Antonio Parodi 2, Eugenio Realini 3, Stefano Federico 4, Rosa Claudia Torcasio 4, Markus Kerschbaum 5, Laura Esbrí 6, Maria Carmen Llasat 6, Tomeu Rigo <sup>7</sup> and Riccardo Biondi <sup>8</sup>**

	- <sup>5</sup> Austro Control, 1030 Vienna, Austria
	- <sup>6</sup> Department of Applied Physics, Universitat de Barcelona, 08007 Barcelona, Spain
	- <sup>7</sup> Meteorological Service of Catalonia, 08029 Barcelona, Spain
	- <sup>8</sup> Dipartimento di Geoscienze, Università degli Studi di Padova, 35131 Padova, Italy
	- **\*** Correspondence: marco.temme@dlr.de

**Abstract:** In the H2020 project "Satellite-borne and INsitu Observations to Predict The Initiation of Convection for ATM" (SINOPTICA), an air traffic controller support system was extended to organize approaching traffic even under severe weather conditions. During project runtime, traffic days with extreme weather events in the Po Valley were analyzed, an arrival manager was extended with a module for 4D diversion trajectory calculation, two display variants for severe weather conditions in an air traffic controller primary display were developed, and the airport Milano Malpensa was modelled for an air traffic simulation. On the meteorological side, three new forecasting techniques were developed to better nowcast weather events affecting tactical air traffic operations and used to automatically organize arrival traffic. Additionally, short-range weather forecasts with high spatial resolution were elaborated using radar-based nowcasting and a numerical weather prediction model with data assimilation. This nowcast information was integrated into the extended arrival manager for the sequencing and guiding of approaching aircraft even in adverse weather situations. The combination of fast and reliable weather nowcasts with a guidance support system enables severe weather diversion coordination in combination with a visualization of its dynamics on traffic situation displays.

**Keywords:** air traffic management and airports; air traffic control; arrival manager; controller support system; severe weather visualization; nowcasting; weather research and forecasting
