The Sky Cover data show a diurnal variation with the cloudiest period in the early morning and the clearest period in the early evening. The IFR data show a diurnal variation with the greatest chances of ceiling IFR conditions from about midnight through early morning. Perhaps the clouds blanket the ground, yet the ground is still radiating enough heat to raise the low clouds slightly. Visibility IFR conditions increase toward daybreak and decrease rapidly through midmorning. The afternoon and early evening hours show the least chances of IFR conditions.
Relative humidities are a mirror image of the temperatures.
Precipitation The Precipitation data show a peak from late at night through midmorning. This peak is likely related to morning drizzle or light rain. The least likely period of rain is through the afternoon hours. The greatest times for thunderstorm occurrence are from 08 through 15 UTC, most likely a result of thunderstorms developing in West Texas and migrating into the area. Thunderstorms are least likely around noon.