Where do severe-storm hazards overlap with populated, vulnerable communities?

Data health

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How to read this map

Hazard / signal: Severe-weather / tornado signals
Exposure: Population exposure
Consequence / vulnerability: Social vulnerability

Official/source values remain distinct from MitchellCo derived screening scores or estimates. Derived values are for prioritization and interpretation, not official warnings or predictions.

Severe Storm & Tornado Exposure

Fuses official SPC severe-weather outlooks, active NWS warnings/watches, recent NWS storm reports and CDC county population. County rankings are a non-official screening tool.

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Populationloading…

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Layers SPC Day 1 categorical outlook SPC Day 1 tornado probability Active severe/tornado watches & warnings NWS severe storm reports, last 24h Derived county exposure screen

How to read it

Marginal SPC risk

Slight

Enhanced

Moderate

High

Active warning

Counties with highest derived exposure

#	County	Pop.	Score
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Derived score
County representative-interior-point screening: SPC category + tornado probability + active warning/watch + population, capped at 100. Missing optional hazard or population inputs are treated as zero rather than blocking the ranking.

Sources & cadence
NOAA/NWS SPC: checked every 15 min.

NWS Alerts API: checked every 2 min.

NWS Local Storm Reports: checked every 30 min.

CDC/ATSDR Social Vulnerability Index 2022 county FeatureServer: county geometry and ACS-derived total population field E_TOTPOP, loaded once per session from the same anonymous service used by HeatRisk.