In the context of severe weather warnings issued by the National Weather Service (NWS) in the United States, a PDS Tornado Warning (Particularly Dangerous Situation) signifies an exceptionally dangerous and life-threatening tornado threat. It's the most severe type of tornado warning and indicates a high probability of multiple strong or violent tornadoes occurring within the warned area.
Here's a breakdown of what a PDS Tornado Warning means:
- High Confidence: Unlike a standard tornado warning, a PDS warning indicates the NWS has a very high confidence that tornadoes will develop and cause significant damage.
- Intensity: The tornadoes associated with a PDS warning are likely to be strong (EF2 or EF3 on the Enhanced Fujita Scale) or even violent (EF4 or EF5). These tornadoes can cause catastrophic damage, destroy buildings, and pose a serious threat to life.
- Urgency to Take Action: When a PDS Tornado Warning is issued, it's crucial to take immediate shelter in a designated storm shelter or the most inner room of a sturdy building on the lowest level.
Here's a comparison of standard tornado warnings and PDS tornado warnings:
| Feature | Standard Tornado Warning | PDS Tornado Warning |
|---|---|---|
| Confidence Level | Moderate to High | Very High |
| Tornado Intensity | Possible, Weak, Strong | Strong (EF2-EF3) or Violent (EF4-EF5) |
| Urgency to Take Action | High | Extremely High |
How to Stay Informed:
- NOAA Weather Radio: Subscribe to local NOAA weather radio broadcasts for real-time severe weather alerts.
- Emergency Alert System: Be aware of alerts on your phone or television through the Emergency Alert System (EAS).
- Weather Apps: Utilize weather apps that provide real-time weather updates and warnings for your location.
Remember: When a PDS Tornado Warning is issued, prioritize your safety by seeking immediate shelter. Don't wait for visual confirmation of a tornado before taking action. Every second counts in these situations.
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