The National Weather Service issued an updated flood advisory at 9:54 p.m. on Tuesday in effect until Wednesday at 8 p.m. for Allegheny County.
The weather service comments, "Flooding caused by excessive rainfall continues."
"At 18.0 feet, Water begins to flow onto the Monongahela Parking Wharf. At 19.0 feet, Water begins to flow onto the North Shore riverwalk between the stadiums. At 19.5 feet, The Monongahela Parking Wharf is completely flooded. At 20.0 feet, Water is up to one foot deep in the lower areas of the North Shore Riverwalk," describes the weather service. "If you encounter a flooded roadway, turn around and find an alternative route. Caution is urged when walking near riverbanks. The next statement will be issued Wednesday afternoon at 1 p.m."
Understanding the differences between advisories, watches, and warnings
- Flash flood warning: Take action!
A flash flood warning is issued when a flash flood is either imminent or already occurring. In flood-prone areas, it's crucial to move immediately to higher ground. A flash flood is a sudden and violent inundation that can develop within minutes to hours, and it can even happen in areas not currently experiencing rainfall.
- Flood warning: Take action!
A flood warning is issued when flooding is imminent or occurring.
- Flood advisory: Be aware:
A flood advisory is issued when flooding is not expected to be bad enough to issue a warning. However, it may cause significant inconvenience, and if caution is not exercised, it could lead to situations that may threaten life and/or property.
- Flood watch: Be prepared:
A flood watch is issued when conditions are favorable for flooding. It doesn't guarantee that flooding will occur, but it signifies that the possibility exists.
When floods strike: Guidelines from the weather service for your protection
In flood-prone regions or while camping in low-lying areas, understanding and following the weather service flood safety guidelines can be a lifesaver:
1. Move to higher ground:
- If you're in a flood-prone area, or if you're camping in a low-lying spot, move to higher ground as a first step.
2. Follow evacuation orders:
- If local authorities issue an evacuation order, heed it promptly. Prior to leaving, secure your home by locking it.
3. Disconnect utilities and appliances:
- If time permits, disconnect your utilities and appliances. This precaution minimizes electrical hazards during flooding.
4. Steer clear of flooded basements and submerged areas:
- Steer clear of basements or rooms where water has submerged electrical outlets or cords. This helps prevent electrical accidents.
5. Evacuate promptly for safety:
- If you notice sparks or hear buzzing, crackling, snapping, or popping sounds, evacuate without delay. Do not enter water that may carry an electrical charge.
6. Stay away from floodwaters:
- Never attempt to walk through floodwaters, even if they appear shallow. Just 6 inches of fast-moving water can forcefully sweep you off your feet.
7. Seek higher ground when trapped:
- Should you become trapped by moving water, reach the highest point possible and dial 911 to contact emergency services.
During heavy rainfall, the risk of flooding is heightened, especially in low-lying and flood-prone regions. Always remember never to drive through water on the road, no matter how shallow it appears. According to the weather service, as little as 12 inches of rapidly flowing water can carry away most vehicles. Prioritize your safety by staying informed and prepared.
Driving through downpours: Safety guidelines for wet roads
Rain can turn roads into hazards. Stay informed and follow these weather service tips to ensure safety during heavy rainfall:
Beware of swollen waterways:
- During heavy rain, avoid parking or walking near culverts or drainage ditches, where swift-moving water can pose a serious risk.
Maintain safe driving distances:
- Adhere to the two-second rule for maintaining a safe following distance behind the vehicle in front of you. In heavy rain, allow an additional two seconds of distance to compensate for reduced traction and braking effectiveness.
Slow down and stay cautious:
- If it is raining and the roads are wet, slow down. Take your foot off the accelerator and let your speed drop gradually. Never use the brakes suddenly because this may cause the car to skid.
Choose your lane wisely:
- Stay toward the middle lanes - water tends to pool in the outside lanes.
Visibility matters:
- Enhance your visibility in heavy rain by turning on your headlights. Watch out for vehicles in blind spots, as rain-smeared windows can obscure them.
Watch out for slippery roads:
- The first half-hour of rain is when roads are slickest due to a mix of rain, grime, and oil. Exercise heightened caution during this period.
Keep a safe distance from large vehicles:
- Large trucks and buses can reduce your visibility with tire spray. Avoid tailgating and pass them swiftly and safely.
Mind your windshield wipers:
- Overloaded wiper blades can hinder visibility. If rain severely limits your sight, pull over and wait for conditions to improve. Seek refuge at rest areas or protected spots.
- When stopping by the roadside is your only option, position your vehicle as far off the road as possible, ideally beyond guardrails. Keep your headlights on and activate emergency flashers to alert other drivers of your position.
By following these safety measures, you can significantly reduce risks and ensure your well-being when heavy rain pours down. Stay informed about weather conditions and heed advice from local authorities to make your journey safe and sound.
Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.