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Abridged. Context. The metal content of dwarf galaxies and the metalenrichment of the intergalactic medium both suggest that mass loss fromgalaxies is a significant factor for the chemical evolution history ofgalaxies, in particular of dwarf galaxies. However, no clear evidence of ablow-away in local dwarf galaxies has been found so far.  Aims. We therefore performed a detailed kinematic analysis of the neutral andionised gas in the nearby star-forming irregular dwarf galaxy NGC 2366 in orderto make predictions about the fate of the gas and to get a more completepicture of this galaxy.  Methods. A deep Halpha image and Fabry-Perot interferometric data of NGC 2366were obtained. They were complemented by HI synthesis data from the THINGSsurvey. We searched for line-splitting both in Halpha and HI by performing aGaussian decomposition. To get an idea whether the expansion velocities arehigh enough for a gas blow-away, we used the pseudo-isothermal halo model,which gives us realistic values for the escape velocities of NGC 2366. The gooddata quality also allowed us to discuss some peculiarities of the morphologyand the dynamics in NGC 2366.  Results. A large red-shifted outflow north west of the giant extragalacticHII region with an expansion velocity of up to 50 km/s is found in Halpha, butnot in HI. Additionally, a blue-shifted component north of the giantextragalactic HII region was detected both in Halpha and HI with an expansionvelocity of up to 30 km/s. A comparison with the escape velocities of NGC 2366reveals that the gas does not have enough kinetic energy to leave thegravitational potential.

A kinematic study of the irregular dwarf galaxy NGC 2366 using HI and Halpha observations