Relatively quiet weather should continue into Friday, as a weak ridge of high pressure southeast of Louisiana keeps an influence on our forecast. Southerly winds will help to keep the heat and humidity on this weekend, with rain chances gradually increasing each day through Memorial Day. Expect highs Friday to reach the upper 80s to near 90. With dew points in the low 70s, this should put heat index values in the 90-95 degree range. A slight chance for an afternoon shower or thunderstorm exists, but only slight at 30%.
Overnight, expect a few more clouds with lows in the 70s. Saturday, some sunshine early in the day with widely scattered afternoon showers and storms. Highs will reach the upper 80s with a heat index near 93. Winds will remain from the south. As a deeper trough digs across the west, and the southeastern Gulf ridge strengthens, moisture will drag off the Gulf of Mexico, with some Pacific moisture being tapped as well. By Sunday, more clouds are expected with highs in the mid to upper 80s and a better coverage of showers and storms. Rain chances by Sunday should be in the 50% range.
Into Memorial Day and early next week, the available moisture will continue to increase. A 60% chance for storms Memorial Day with widespread 70% coverage by Tuesday and Wednesday. Because the atmosphere will be even more unstable, rain and storms will be starting up earlier in the day by Tuesday. Expect highs next week to reach the mid 80s with lows in the 70s.
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