Carbon County, Wyoming: hazard history

FEMA declared 5 disasters that named Carbon County between 2011 and 2020.

Most recent declarations

• FM-5375 2020 · Fire · Mullen Fire
• FM-5347 2020 · Fire · 316 Fire
• EM-3479 2020 · Biological · Covid-19
• DR-4535 2020 · Biological · Covid-19 Pandemic
• DR-4007 2011 · Severe Storm · Severe Storms, Flooding, And Landslides

Not counted above: 2 statewide declarations, which covered every county in Wyoming. A declaration is a decision to send federal help, not a measure of how bad an event was. Records run from 1953. Source: FEMA OpenFEMA Disaster Declarations Summaries.

Records start in 1996. Damage is NOAA's estimate at the time, in nominal dollars, and is often rounded; it is not insurance claims data. A storm that crossed two NOAA zones in this county is recorded, and counted, once per zone. A storm filed against a forecast zone is counted in every county that zone covers, with the whole storm's damage; do not add these figures across counties.

NOAA storm event records in Carbon County each year. The busiest year was 2017, with 571 records.

Years with no record are left out of the table, not shown as zero.

Costliest records

1. Thunderstorm Wind · Apr 14, 2000$100K
   NOAA name: Carbon County · NOAA record 5138125
2. Thunderstorm Wind · Apr 20, 2001$50K
   NOAA name: Carbon County · 3 injuries · NOAA record 5237105
3. High Wind · Dec 8, 2025$30K
   NOAA name: NWS forecast zone · NOAA record 1299133

Deadliest records

1. Flash Flood · Jul 19, 20114 deaths
   NOAA name: Carbon County · 2 injuries · NOAA record 317528
2. Lightning · Aug 10, 19981 death
   NOAA name: Carbon County · 1 injury · NOAA record 5660496
3. Lightning · Sep 17, 20021 death
   NOAA name: Carbon County · NOAA record 5314517
4. Blizzard · Mar 13, 20191 death
   NOAA name: NWS forecast zone · NOAA record 802414
5. Heavy Snow · Oct 19, 20191 death
   NOAA name: NWS forecast zone · NOAA record 858580

Each line is one NOAA record, linked to its page at NOAA. One large storm can appear more than once if NOAA recorded it in several zones of this county. Dollars are nominal.

The National Flood Insurance Program paid $117K on 34 claims in Carbon County from 1984 to 2011.

A count of claims, not a rate: NFIP publishes no count of insured homes beside it, and most flood damage is uninsured. Nominal dollars. Records run from 1978 to 2024; claims filed without a county code are not on any county page. Source: FEMA OpenFEMA FIMA NFIP Redacted Claims.

A hazard vulnerability analysis rates each hazard for probability, impact, preparedness and response. Probability is the one column the county’s federal record can fill — NCEI storm events from 1996 to 2026 and FEMA declarations naming the county — and this is what it says for a facility here, on the 0–3 scale of the all-hazards structure surveyors expect. The other six columns are the facility’s own judgment about its building, and Calchis leaves them blank.

A dash means the record does not speak to that hazard; it is not a zero. Whether a finished document satisfies the CMS Emergency Preparedness Rule is the facility’s finding and its surveyor’s. Complete the HVA for a facility in Carbon County — the technological, human and hazardous-materials rows, the six facility columns, the approval and the printed document — or read the sample analysis on that page first.

• Every figure is counted from public federal records held by Calchis: NOAA NCEI Storm Events, FEMA OpenFEMA Disaster Declarations, and FEMA NFIP claims. Nothing is modeled or estimated.
• NOAA files some events against a county and others against an NWS forecast zone, and publishes a code for both. Records are counted as Carbon County by that code — county records by the county's own FIPS code, zone records through the National Weather Service's published list of which counties each zone covers. No name matching is involved. Of 4,457 records, 163 were filed against this county and 4,294 against a forecast zone covering it. A zone storm is counted in every county its zone covers, and its damage figure is the whole storm's, not this county's share — NOAA does not publish that split. So these figures describe this county; they must not be added up across counties. Left out: 6% of Wyoming's NOAA records, which are marine zones or zones NWS does not map to a county.
• Counts last rebuilt from the source records on Sep 15, 2026.
• This county's NOAA record is short (under 100 records, under 10 with damage, or under 10 years), so this page is not offered to search engines. It is still accurate.