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State disaster-history atlas

Wyoming disaster history

Compare federal administrative declarations and NOAA county-coded observed-event reports across 23 Wyoming county equivalents. The source-specific distributions and medians below use the statewide official-source datasets, with 1 detailed county profile available to explore.

Data updated Aug 21, 2026 · Current conditions: Live Dashboard →

State baselines by official source

Each median is calculated across every county equivalent using the same source, unit, and coverage period as its linked county profile. Category totals describe records, not severity or losses.

Administrative records

FEMA declaration distribution

OpenFEMA county-designation records show where federal disaster declarations included a county. A single declaration can designate many counties, and declaration decisions do not inventory every physical event.

County median
5
County sample size
23
Statewide county records
131
Statewide category distribution
CategoryRecordsShare of this source
Biological4635.1%
Wildfire3325.2%
Flood2317.6%
Severe storm2015.3%
Drought43.1%
Tornado21.5%
Winter storm21.5%
Chemical10.8%
Coverage
Jan 1, 1964 – Aug 21, 2026
Source updated
Aug 20, 2026
Retrieved by HazardNow
Aug 21, 2026
Completeness for stated rules
complete

Observed-event reports

NOAA observed-event distribution

NOAA Storm Events totals include distinct county-coded records in the comparable all-event era beginning in 1996. Forecast-zone and marine-zone records are excluded from county totals.

County median
223
County sample size
23
Statewide county records
7,658
Statewide category distribution
CategoryRecordsShare of this source
Hail4,24855.5%
High wind2,21128.9%
Flood5517.2%
Tornado4896.4%
Lightning540.7%
Severe storm520.7%
Wildfire490.6%
Landslide20%
Other20%
Coverage
Jan 1, 1996 – May 31, 2026
Source updated
Aug 19, 2026
Retrieved by HazardNow
Aug 21, 2026
Completeness for stated rules
partial

County profile previews

Preview county record totals and seasonal context here, or use the full directory above. Every profile includes monthly NOAA seasonality, representative records, same-source comparisons, preparedness implications, print and sharing tools, and source disclosures.

How to read this state atlas

Compare like with like

Compare FEMA declarations only with FEMA declarations, and NOAA county-event records only with NOAA county-event records. Coverage periods must match.

Interpret the median carefully

A county above or below the state median has a different historical record count for the selected official source and coverage period.

Expect reporting limitations

Administrative policy and observation practices change. NOAA finalized records also lag recent event months, and zone-coded events are excluded from county totals.

Browse all state atlasesOpen the national FEMA heatmapReview data sources