My Forecast Comments - Mon July 21 - Sat July 26: This week begins as the tail end of a weak washed out cold front moves East and mid-upper level high pressure builds/strengthens and moves toward Central Texas.

As is typical with stronger high pressure ridges, dry air aloft is forced away from the High and downward toward the surface, thus forming a "cap". This cap or lid, if you will, inhibits the formation of showers and thuderstorms. Additionally, the warm air is trapped at lowers levels, and, coupled with some low level (close to surface) moisture and light winds, causes heat values/indexes to rise significantly at times.

Temperatures above normal (mid to upper 90's and heat indexes close to or above 100) this week with slight chances of some afternoon sea-breeze type showers if enough moisture is around and there is any weakness in the cap aloft. Don't have much confidence in rain chances though, so will call it 10-20% over this coming week at best. Keep hydrated when outdoors!!

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