Gulf Coast storm system brings heavy rain and coastal flood risk
Why does this storm system cause heavy rain?
This isn’t the first time the Gulf Coast has seen heavy rain from warm, humid air moving inland and colliding with slow-moving storm energy. The deeper tropical moisture in place will help to sustain the heavier showers in the same spots for a longer time. This raises the risk of flooding on the roads, poor visibility and hazardous driving conditions.
- Heavy showers from warm gulf moisture.
- More rain totals as the storm slows down.
- More storms could flood neighbourhoods again.
- Urban street flooding can strike quickly.
Which Area Is Most at Risk of Flooding?
Coastal cities, low-lying roads, bayous, poorly drained neighbourhoods and areas that were saturated by previous rainfall may be more susceptible to flooding. Where the storms organise will determine their impact on Texas, Louisiana, Mississippi, Alabama and Florida. Outside the heaviest rain, areas will likely be in a watch for rapid weather changes.
Flooding along the coast can be extremely damaging to communities.
Offshore winds push the Gulf water onto beaches, bays, rivers and tidal areas and cause coastal flooding. High tides can also raise water levels, exposing roads, parking lots, docks and waterfront neighbourhoods. “Even small coastal flooding can lead to travel delays, property concerns and safety issues at the shoreline.”
- Do not park in areas close to water where flooding is likely.
- Do not walk through moving coastal flood water.
- Learn about tide-related road closures.
- If you have any loose items outside around water, secure those.
- Follow local emergency instructions now.
Will this storm develop into a tropical?
Not every storm that forms in the Gulf becomes a named tropical system. Some systems produce heavy rain, gusty winds and coastal hazards but never become classified as a tropical storm or hurricane. Development is affected by wind patterns, sea surface temperatures, storm structure and atmospheric pressure. Whatever the moniker, the big problem is flooding and dangerous surf.
What driving issues should you be prepared for?
Heavy rain could lead to slick roads and poor visibility. More intense storms could lead to flash flooding at intersections, ponding of water on highways and water at low crossings. “Drivers are advised to slow down, turn on their lights, keep their distance and never drive through floodwater. The depth of the road can be deceptive.
- Don’t drown. Turn around. When there is water on the road.
- Check traffic and weather alerts before you go.
- Allow extra time for city routes and coastal routes.
- Make sure cell phones are charged in the event of delays.
That is the problem with rip currents too.
Storm systems over or near the Gulf can create rough surf, strong waves and dangerous rip currents, even when it is not raining at the beach. These fast-moving channels of water can pull swimmers away from shore. Beachgoers are reminded to pay attention to warning flags, lifeguard advice and local beach closure notices.
Residents: Here’s How to Prepare for Heavy Rain
Flood Safety Messaging and Protecting Your Essentials People in vulnerable areas should be monitoring local alerts, moving vehicles out of flood-prone areas and gathering emergency supplies. Coastal businesses should secure outdoor equipment and check drainage areas in case of possible access problems during peak rainfall.
- Bring flashlights, batteries and rechargers.
- Store important papers in plastic bags.
- Clean your drains and gutters before the storm.
- Do not leave valuables on the ground floor.
- Know how to get to high ground nearby.
When Things Might Be Better
Flooding impacts may persist well beyond the cessation of rainfall, but weather conditions may improve as the storm system moves away or weakens. Rivers, bayous and drainage systems could take longer to recover. Those affected by the flood are urged to await official messages giving the all-clear to return to the flood-affected areas to resume normal coastal activities.
What is the key safety message?
The big thing is to be ready for heavy rain and coastal flooding even if the system isn’t a hurricane. Weather along the Gulf Coast can change in the blink of an eye, and water hazards are often more dangerous than they appear. Knowing what’s going on, staying out of floodwaters and heeding local warnings can go a long way towards reducing risk.
