Manok, I was reading a fact sheet about the WC-130J and this made me think about your query.

"The aircraft is capable of staying aloft almost 18 hours at an optimum cruise speed of more than 300 mph. An average weather reconnaissance mission lasts 11 hours and covers almost 3,500 miles. The crew collects and reports weather data as often as every minute. "  

There is a link to some really nice full sized C-130J photos also.

Read in entire sheet here http://www.403wg.afrc.af.mil/library/factsheets/factsheet.asp?id=7482

RayM