8/31 – Rob Knight’s “Final Morning of August” Forecast

One more day of elevated rain chances during the mid-afternoon hours before dissipating with sunset. Temperatures should reach the lower 90s today before any rain cooling can occur where shower and thunderstorm activity develops. Heat index values in the 100-105 range are expected. High pressure will be moving towards the area and will be in place by tomorrow and will lower rain chances considerably. Temperatures will be a little higher tomorrow with the lower rain chances but dew-points will be slightly lower, resulting in another afternoon with heat index values near 100.

Models show upper high-pressure to the east and west of the area for much of the week. This seems to be the predominant pattern recently. Dry air will be in place Wednesday into Thursday morning s with the moisture levels increasing a bit Friday into Saturday as a shallow frontal boundary moves into the area. This should be enough forcing for some isolated to scattered diurnal convection by Friday, continuing into Saturday, before another boundary and mid-level drying move into the area.