A severe thunderstorm warning in Arizona would most likely be issued under the following conditions:
- Intense Rainfall: When heavy rain is producing flash flooding or significant ponding on roadways.
- Strong Winds: Wind gusts exceeding 58 miles per hour, which can cause damage to trees, power lines, and buildings.
- Large Hail: Hailstone sizes of 1 inch in diameter or larger can lead to damage to vehicles, roofs, and crops.
- Tornado Potential: The presence of conditions favorable for the development of tornadoes.
In Arizona, severe thunderstorms can also occur during the monsoon season, which typically runs from June to September, bringing the potential for flash flooding and severe weather.