Stronger high pressure building in means fewer storms, hotter temperatures this weekend

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HUNTSVILLE, Ala. – Some areas have gotten much needed rain in the past several days while others continue to struggle to get enough rain to measure. Data shows some communities in Lawrence and Lincoln Counties have picked up between three and five inches of rain. On the low end, communities in Madison, Marshall and Morgan Counties have seen less than a half inch.

Updates to the weekend forecast are not promising for widespread, beneficial rain, and that is due to sprawling high pressure in the western Atlantic building in.

High pressure in the Atlantic keeps the chance of significant rain to the west of north Alabama through early next week (Image: WHNT News 19)

High pressure in the Atlantic keeps the chance of significant rain to the west of north Alabama through early next week (Image: WHNT News 19)

This feature will act to keep the upper-level low now over southeast Louisiana tracking west, keeping the really significant rain over Louisiana and south Mississippi through the weekend.

With a lower chance of rain, we have adjusted temperatures up from the upper 80s to the lower 90s starting Friday afternoon through early next week. We will keep a low-end chance (around 30 percent) of a passing shower or storm in the forecast, but anything that is able to develop would likely be very spotty and not last long.

The low over Louisiana eventually gets absorbed into a slow-moving cold front early next week. The high pressure will not change much in strength or position, so this should keep the front from making into the Tennessee Valley until late next week.

Seven-day rain potential from the GFS (American Model) (Image: WHNT News 19)

Seven-day rain potential from the GFS (American Model) (Image: WHNT News 19)

Seven-day rain projections show the heavier rain piling up in Louisiana and Mississippi, and you can pick out where the front will stall by noticing the heavier rain totals oriented southwest to northeast from Oklahoma through Indiana. The rain outlook from the Weather Prediction Center shows a similar pattern, but has much less rain here in north Alabama through the middle of next week.