Heat dome keeps Mississippi temperatures high
• An upper-level ridge of high pressure, commonly referred to as a 'heat dome,' is currently dominating the weather in Mississippi, keeping temperatures significantly above average. Highs are expected to range from the mid-90s °F (35-37 °C) through Friday, September 18,
• Rain chances remain near zero during this period, but an easterly surface flow is helping to keep humidity levels lower, preventing heat index values from exceeding 105 °F (40.5 °C). By the weekend, the heat dome will begin to weaken and shift westward, allowing an upper-level low to approach the region. This transition will increase moisture and the likelihood of scattered showers and storms starting Saturday and continuing into early next week.
Impact & Risks
Residents in Mississippi should prepare for continued above-average heat through the end of the week, with highs in the mid-90s °F (35-37 °C). While the heat index is not expected to reach dangerous levels, prolonged exposure to high temperatures can still pose risks, particularly for vulnerable populations such as the elderly and young children. The weekend will bring a slight reprieve as the heat dome weakens, but scattered showers and storms could disrupt outdoor plans.
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