How do funnel clouds form, and what is their significance in tornado prediction and detection?

How does the National Weather Service issue tornado warnings, and what steps should residents in San Antonio take upon receiving a warning?

The National Weather Service (NWS) issues tornado warnings based on the following criteria:

• Radar: The NWS uses Doppler radar to detect rotating thunderstorms that have the potential to produce tornadoes.
• Visual: NWS meteorologists may also issue warnings based on visual observations of tornadoes or tornado-like conditions.
• Storm reports: The NWS also considers storm reports from the public when issuing warnings.

When a tornado warning is issued for San Antonio, residents should take the following steps:

• Take shelter immediately: The safest place to be during a tornado is in a basement or underground shelter. If you do not have access to a basement or underground shelter, go to the lowest level of your home or building and stay away from windows.
• Get under something sturdy: If you cannot get to a basement or underground shelter, get under a sturdy piece of furniture, such as a table or desk.
• Cover your head and neck: Protect your head and neck with your arms or a pillow.

Extra question:

What are the different types of tornado warnings?

Answer:

There are two types of tornado warnings:

• Tornado warning: This is the most serious type of tornado warning and indicates that a tornado has been sighted or is indicated by radar.
• Tornado watch: This indicates that conditions are favorable for tornado development, but a tornado has not been sighted or indicated by radar.

It is important to note that tornado warnings are issued based on the best available information at the time. However, even if a tornado warning is not issued, it is still important to be aware of the potential for tornadoes and take precautions if you see any threatening weather conditions.