Hi Lonnie, sorry it took me a few days to respond to your message, but figured I'd post my reply here in the public forum for others to see if interested.
As far as examining the weather system that spawned the 5-30-54 tornado, one of the better sources that has not been brought up by previous posters is the NOAA U.S. Daily Weather Maps page:
http://docs.lib.noaa.gov/rescue/dwm/data_rescue_daily_weather_maps.html
By plugging both 5-30-54 and 5-31-54 into the drop down menu, we start to get a sense of the weather setup. A surface analysis and 500 mb analysis is depicted for each date, among other maps.
Unfortunately, the main 5-30-54 surface analysis (large image) has a time stamp of 1230 AM CST, so this was quite a few hours before the tornado. It does however show a surface high pressure axis centered over the Ohio Valley, with southerly return flow starting to bring moisture back into the Plains.
Jumping ahead to the 5-31-54 maps, things get a lot more interesting. For one, the 500mb analysis depicts a classic mid-level trough approaching the Central Plains. A comparison of the surface maps in the upper left corner and main large map reveal features at both 1230pm CST on the 30th, and 1230 AM CST on the 31st, respectively. The earlier (upper left) image shows a warm front lifting northward into Nebraska out of Kansas. The larger image from 130 AM on the 31st, although it is a few hours after the tornado occurred, depicts a cold front slicing into eastern Nebraska with a warm front/stationary front draped across east central NE into northwest IA. Note the ob at Omaha, with southerly winds and a dewpoint of 66, while at Sioux City, a thunderstorm was reported.
Clearly, a lot of rapid changes took place in the 24 hour-period examined for these 2 dates on the map archive. All in all, it appeared to be a fairly classic severe weather situation for late May, with a rapid return of low level moisture ahead of a developing mid-level trough over the western U.S.
I hope this web source and brief explanations of the maps help piece together the meteorology of the 5-30-54 tornado event for you.