The weather link gives you the forecast for Houston over the next 48 hours. To convert to CST subtract 6 hours.
Yellow dots mean rain and the funny squiggly symbol is a thunderstorm.
Predicted precip amounts are in inches for each 3 hr interval. The circles indicate cloud cover. An open circle is clear, and filled is cloudy. The second graph shows the predicted height of the cloud deck in feet. If only 20000 is indicated this is probably light cirrus that will cover the sky and lower transparency, but may give good seeing.