Winds again stronger - SW 15 kt to 1.2 km, SE 15 above. Light land breeze has developed at a few stations, but stronger winds above surface should prevent much accumulation of nighttime plume. Expect same evolution of winds as in the past few days light in morning, picking up from south or southwest near noon, with sea and bay breezes along coasts; southeast to south winds during the middle and late afternoon. Expect max levels around 100-110 ppb due to slightly stronger winds, Sunday emissions, and 40 ppb background instead of 60 ppb.

Max T 97-99 F (37 C)

Clouds some

Roughly similar today, except humidity (and cloud cover) will be much higher (first isolated showers of the experiment likely) and winds are expected to be lighter during the evening.

A ridge building over the southeastern US will bring unsettled weather with possible widespread showers. Prevailing winds will be from the east-northeast. Dirtiness of air mass will depend upon extent of upstream and local showers, but it could be quite dirty. Lighter large-scale winds than in the past few days would favor high ozone. The urban plume would be advected toward the northwest, most likely toward Austin.