Respan Dataset Explorer

Use the drop-down menus to select the storm that causes each environmental hazard.

Flash flood 

Storm surge 

Sure! Here are the storms that are commonly associated with each environmental hazard:

- **Flash flood**: Usually caused by **heavy rainfall**, thunderstorms, or rapidly melting snow.
- **Storm surge**: Typically associated with **hurricanes** or **tropical storms**.

If you're looking for something specific, please let me know!

During the night, you woke up to strong rains and wind. You’re not exactly sure which kind of storm occurred. In the morning, you see that a tree in your yard is split in two. This is the only damage and debris in the area.

What type of storm most likely caused the damage?

cyclone
hurricane
thunderstorm
tornado

Given the scenario described, where there were strong rains and winds during the night, and the only visible damage is a tree split in two, the most likely type of storm that caused the damage is a **thunderstorm**.

While tornadoes can also cause significant damage to trees, they generally create more widespread destruction and debris. Hurricanes typically involve prolonged heavy winds and rain, but in your case, the description suggests a more localized event. Therefore, a thunderstorm fits the situation best.

Your home is located in a deep river valley less than a mile from where the river flows into the Gulf of Mexico. A hurricane is growing in the Gulf of Mexico, and warnings have been issued that the storm will touch ground within two days.

Which safety measures should you take?

Go to a shelter farther inland on higher ground.
Stay indoors and close your windows.
Board up your windows and go to your basement.
Open windows and doors to equalize pressure.

In the situation you described, where a hurricane is approaching and you live in a deep river valley near the Gulf of Mexico, the safest measure to take would be to **go to a shelter farther inland on higher ground**. 

Here’s a brief rationale for each option:

- **Go to a shelter farther inland on higher ground**: This is the safest option as it moves you away from potential flooding and storm surge associated with the hurricane.

- **Stay indoors and close your windows**: While this may seem safe initially, it is not advisable if you are in a low-lying area close to a river. If a significant storm surge or flooding occurs, this could still put you at risk.

- **Board up your windows and go to your basement**: Boarding up windows is a good idea to protect against flying debris, but going to a basement in a river valley adds the risk of flooding.

- **Open windows and doors to equalize pressure**: This is dangerous and outdated advice that can lead to further risks during a hurricane, including allowing storm winds and water to enter your home.

Always prioritize evacuation to a safer location when severe weather, such as a hurricane, is imminent.

In the middle of the night, you hear a tornado siren. Which step should you take?

Map an evacuation route.
Go to your basement.
Board up your windows.
Open your window.

If you hear a tornado siren in the middle of the night, the best step to take is to **go to your basement**. 

Here's a brief explanation for each option:

- **Map an evacuation route**: While planning is important, in the case of a tornado, you typically don't have time to evacuate, and it is safer to seek shelter immediately.

- **Go to your basement**: This is the safest option, as basements provide the best protection from tornado winds and flying debris. If you do not have a basement, seek shelter in a small interior room or hallway on the lowest level of your home, away from windows.

- **Board up your windows**: This is not advisable during a tornado warning. You should focus on seeking shelter instead, as boarding up will not provide protection during an active tornado.

- **Open your window**: This is a dangerous and outdated practice that can lead to additional risks. It’s important to seal openings to prevent wind from entering.

In summary, head to your basement (or an interior safe area) immediately when you hear a tornado siren.

Which condition causes storms to occur?

freezing of water droplets
sudden change in air pressure
condensation of water vapor
rapid heating of upper atmosphere

The condition that primarily causes storms to occur is the **condensation of water vapor**. 

Here's a brief explanation of how each option contributes to storm development:

- **Freezing of water droplets**: This can occur during certain storm types, such as snowstorms or hail formation, but it is not a primary cause of storms themselves.

- **Sudden change in air pressure**: While changes in air pressure can influence weather patterns, they are more of a result of storms than a direct cause.

- **Condensation of water vapor**: This is the key process leading to storm formation. When warm, moist air rises, it cools and condenses into clouds and precipitation, which can lead to storm development.

- **Rapid heating of upper atmosphere**: While heating can contribute to instability in the atmosphere, it is not the main condition causing storms.

In summary, the condensation of water vapor is fundamental to the process of storm formation, as it releases latent heat, which further fuels the storm.

A front refers to

the location where two air masses meet.
an air mass that extends across a large area.
a large body of air moved by global wind patterns.
a place on Earth’s surface affected by uneven heating.

A front refers to **the location where two air masses meet**. 

Here's a brief explanation of each option:

- **The location where two air masses meet**: This is the correct definition of a front. Fronts are boundaries between different air masses that have contrasting temperatures and humidity levels.

- **An air mass that extends across a large area**: This refers to an air mass itself, not a front. Air masses are large bodies of air with uniform temperature and humidity.

- **A large body of air moved by global wind patterns**: This describes air masses, which can be influenced by global wind patterns but does not define a front.

- **A place on Earth’s surface affected by uneven heating**: While uneven heating can lead to various weather phenomena and changes in air pressure, it does not specifically define what a front is.

In summary, the most accurate definition of a front is the location where two air masses meet.

Which is one characteristic of hurricanes?

occur mostly inland
create widespread damage
last for a short amount of time
gain strength after passing over land

One characteristic of hurricanes is that they **create widespread damage**.

Here’s a brief explanation of how each option relates to hurricanes:

- **Occur mostly inland**: Hurricanes typically form over warm ocean waters and make landfall before dissipating; they do not originate or primarily occur inland.

- **Create widespread damage**: This is true as hurricanes can produce strong winds, heavy rainfall, and storm surges, which can lead to extensive damage across large areas.

- **Last for a short amount of time**: Hurricanes can last for several days or even longer, especially when they are over warm ocean water. Thus, they do not fit this characteristic.

- **Gain strength after passing over land**: This is incorrect. Hurricanes lose strength when they move over land due to the lack of warm water, which is essential for their energy.

In summary, the characteristic of hurricanes that stands out is their ability to **create widespread damage**.

Which scenario describes the damage caused by a tornado?

a flooded city on the coast with trees damaged by high winds
a section of forest with trees that are burned or split in half
a beach that has been severely damaged because of storm surge
a path of destruction up to 50 miles long with destroyed trees and homes

The scenario that best describes the damage caused by a tornado is **a path of destruction up to 50 miles long with destroyed trees and homes**. 

Here's a brief explanation of the options:

- **A flooded city on the coast with trees damaged by high winds**: This describes flood damage and potential wind damage, typically from hurricanes, not tornadoes.

- **A section of forest with trees that are burned or split in half**: This could indicate damage from a wildfire or possibly high winds, but it does not specifically characterize tornado damage.

- **A beach that has been severely damaged because of storm surge**: This is characteristic of damage from hurricanes or tropical storms, where storm surge can cause significant coastal flooding and erosion.

- **A path of destruction up to 50 miles long with destroyed trees and homes**: This scenario accurately describes the damage caused by tornadoes, known for their narrow, intense swaths of destruction that can extend for long distances.

In summary, the most accurate description of tornado damage is the path of destruction with destroyed trees and homes.

A person trapped outside during a thunderstorm should

lie in a ditch or other low-lying area.
get out of a car and take shelter under a tree.
stay away from trees, water, and tall objects.
run away from the thunderstorm as quickly as possible.

A person trapped outside during a thunderstorm should **stay away from trees, water, and tall objects**.

Here’s a brief explanation of why this is the best option along with the other choices:

- **Lie in a ditch or other low-lying area**: This can be dangerous because lying in a ditch can increase the risk of flooding if heavy rain occurs. Additionally, it may expose a person to lightning.

- **Get out of a car and take shelter under a tree**: This is not safe. Trees can attract lightning, and seeking shelter under one increases the risk of being struck.

- **Stay away from trees, water, and tall objects**: This is the safest option. During a thunderstorm, it's important to avoid objects that can attract lightning, such as tall trees, and to stay clear of water, as it conducts electricity.

- **Run away from the thunderstorm as quickly as possible**: This may not be practical or safe, as thunderstorms can move rapidly, and trying to outrun one could be dangerous.

In summary, the safest approach during a thunderstorm is to stay away from trees, water, and tall objects.

Before a hurricane strikes, it is safest to

go outside to watch for the hurricane.
go to a ditch or other low-lying area for shelter.
know the evacuation route in case of an evacuation.
seek shelter in a basement or the lowest floor of the building.

Before a hurricane strikes, it is safest to **know the evacuation route in case of an evacuation**.

Here’s a brief explanation of each option:

- **Go outside to watch for the hurricane**: This is dangerous. It’s important to stay indoors and not expose yourself to the elements before the hurricane arrives.

- **Go to a ditch or other low-lying area for shelter**: This is not advisable because low-lying areas are susceptible to flooding, especially during a hurricane.

- **Know the evacuation route in case of an evacuation**: This is the best option. Being aware of the evacuation routes and having a plan is crucial for safety when a hurricane threatens to land. 

- **Seek shelter in a basement or the lowest floor of the building**: While this is generally good advice during a hurricane, knowing your evacuation route is a more proactive step to take before the storm strikes, as you may need to evacuate.

In summary, the safest action before a hurricane strikes is to **know the evacuation route in case of an evacuation**.