BTSSSIS (SISR)

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  • Level 1 – Weak / Marginal Storm [ALPHA] [POPCORN]
    Intensity: Minimal organization, low energy.
    Potential Threats: Brief heavy rain, isolated lightning, weak wind gusts.
    Likelihood of Severe Weather: Very low (<10%).
    Spotter Action: Routine monitoring; no immediate concern.

  • Level 2 – Moderate / Developing Storm [BRAVO] [BRUISER]
    Intensity: Some organization, moderate energy.
    Potential Threats: Stronger wind gusts (40-50 mph), small hail (<1"), frequent lightning.
    Likelihood of Severe Weather: Low to moderate (10-30%).
    Spotter Action: Watch for strengthening; report if conditions worsen.
  • Level 3 – Strong / Organized Storm [CHARLIE] [CHARGER]
    Intensity: Well-structured, high energy, capable of severe weather. Potential Threats: Damaging winds (50-70 mph), large hail (1-2"), possible weak tornado (EF0-EF1). Likelihood of Severe Weather: Moderate to high (30-60%). Spotter Action: Active spotting; relay critical updates.
  • Level 4 – Intense / Severe Storm [DELTA] [DOMINATOR] Intensity: Highly organized, very high energy, significant severe risk. Potential Threats: Destructive winds (70+ mph), very large hail (2"+), strong tornadoes (EF2-EF3), flash flooding. Likelihood of Severe Weather: High (60-90%). Spotter Action: Urgent reporting; seek safe positioning. 
  • Level 5 – Extreme / High-End Storm [ECHO] [ENDER] Intensity: Exceptionally organized, extreme energy, potentially life-threatening. Potential Threats: Catastrophic winds (90+ mph), giant hail (3"+), violent tornadoes (EF4-EF5), extreme flooding. Likelihood of Severe Weather: Very high (>90%). Spotter Action: Extreme caution; prioritize safety; relay critical info immediately.