The only thing I really look at / check is the wind. If the wind is not blowing to hard and the water condition is good.....it is time to fish.
While you are out fishing on Big Lake, watch what the tide is doing during the day. Then when you are computer the next time.....check:
http://waterdata.usgs.gov/la/nwis/uv...65,72020,00060
I have often found that what is happening on the lake is not what this web site says in going on down in Cameron [even allowing some time difference].