Step 1:
Start out by creating a new document 300x300 (bigger if you want later on). Hit 'd' to reset the colors, then go to filter > render > clouds and then different clouds. After that, filter > stylize > find edges.




Step 2:
After you get your image looking a little something like the image above, go to filter > blur > radial blur. Use the settings below.




Step 3:
Now that you got you image looking a little something like the image above, go to filter > stylize > glowing edges. See the settings below (results follow):




Step 4:
Duplicate the layer that you have been working with and set the blend mode to overlay (on new layer). With your new layer selected to to filter > blur > motion blur and use an angle of 0 and distance of 69 for the settings. Duplicate your new layer and then go to filter > blur > motion blur (use the same settings you used before). Now with you new layer selected (the upper most layer, or the one on top) change the blend mode to soft light. Now you should have 3 layhttp://cinnovations.proboards56.com/index.cgi?board=gfxtut&action=posters. Select the middle one and hit Ctrl+U (to colorize) and use these settings:

Hue: 34
Saturation: 100
Lightness: 11



Be sure to have colorize box checked. You should get something like the image below:



Hope you liked this tutorial!