Scorching Heat and Thunderstorms Threaten South Florida 8/22

Photo byNational Weather Service

Dangerous Heat Indexes, Thunderstorms, and Flood Risk Over the Weekend

MIAMI — Issued by the National Weather Service at 3:57 AM EDT on Thursday, August 22, 2024. South Florida is bracing for a potentially hazardous day of scorching heat, severe thunderstorms, and flood risks, according to an urgent weather advisory from the National Weather Service (NWS).

Heat Advisory in Effect for Broward and Miami-Dade Counties

Starting at 10 AM this morning, a Heat Advisory is in place across Broward and Miami-Dade Counties, expected to persist until 6 PM EDT. Heat index values are predicted to soar between 105°F and 108°F, creating dangerous conditions for those exposed to the elements. The NWS warns that such high temperatures paired with significant humidity can lead to heat-related illnesses, especially for vulnerable populations.

Residents are urged to stay hydrated, avoid outdoor activities during peak hours, and check on neighbors, particularly the elderly and those without air conditioning. Lightweight, loose-fitting clothing and seeking shelter in air-conditioned spaces are highly recommended.

Thunderstorms Bring More Threats

In addition to the heat, scattered to numerous thunderstorms are expected to develop primarily in the afternoon. While these storms will initially affect interior portions of South Florida, they could escalate in strength. Wind gusts of up to 50 mph, frequent lightning, and heavy downpours are likely, which could lead to localized flooding in areas where storms move slowly.

The threat of flooding may increase over the weekend, as a tropical wave is predicted to bring enhanced moisture to the region. Persistent storms and downpours in the same locations could overwhelm drainage systems, particularly in low-lying urban areas.

Rip Currents Along the Atlantic Coast

A moderate risk of rip currents continues along the Palm Beaches, increasing Friday as onshore winds strengthen. Those planning to visit the beach should heed warnings and swim near lifeguards, as rip currents pose significant dangers, especially to inexperienced swimmers.

Weekend Outlook: Strong Storms and High Heat

The forecast shows little relief as high heat indices—well above 100°F—are expected to continue through the weekend. Moreover, strong thunderstorms could persist into Friday and Saturday, further elevating the risk of flooding and wind damage across the region.

Precautionary Measures Urged

The NWS encourages residents to remain vigilant and stay informed by monitoring local media and weather updates. Anyone venturing outside should be aware of the signs of heat exhaustion and heat stroke, and avoid risky activities in severe weather conditions.

Remember, floodwaters can be dangerous, even in shallow depths. Avoid driving through flooded areas and seek higher ground when necessary.

Seek Out Updates

Weather Watches, Warnings & Advisories are frequently updated by the National Weather Service. Please look for updates to this report from your local news channels and NOAA All Hazards. Please follow Thumbwind Publications for more local weather and news updates.