Montana, 2011
The year's recorded storm events, federal disaster declarations and flood insurance claims.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders.
Events by hazard
Includes events recorded by forecast zone. The state's yearly total for 2011 was 1,514 against 1,185 in 2010.
Counties with the most recorded events
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 20 May 2011 | Carbon | Flood | — | $1,000,000 | 1 | — |
| 21 May 2011 | Yellowstone | Flood | — | $300,000 | 1 | — |
| 11 Jun 2011 | Carbon | Lightning | — | — | 1 | — |
| 31 Dec 2011 | Forecast zone | Avalanche | — | — | 1 | — |
| 17 Aug 2011 | Forecast zone | Heat | — | — | 1 | — |
| 24 May 2011 | Big Horn | Flash Flood | — | — | 1 | — |
| 26 Jul 2011 | Park | Lightning | — | — | — | 3 |
| 27 Nov 2011 | Forecast zone | High Wind | 81 mph | — | — | 2 |
| 5 Jan 2011 | Forecast zone | Winter Weather | — | — | — | 2 |
| 23 May 2011 | Musselshell | Flood | — | $6,000,000 | — | — |
| 21 May 2011 | Big Horn | Flood | — | $4,000,000 | — | — |
| 20 May 2011 | Sweet Grass | Flood | — | $4,000,000 | — | — |
| 20 May 2011 | Stillwater | Flood | — | $2,000,000 | — | — |
| 20 May 2011 | Custer | Flood | — | $1,100,000 | — | — |
| 29 Jul 2011 | Richland | Thunderstorm Wind | 110 mph | $500,000 | — | — |
| 1 Jul 2011 | Carbon | Flood | — | $600,000 | — | — |
| 20 May 2011 | Fallon | Flood | — | $375,000 | — | — |
| 20 May 2011 | Carter | Flood | — | $320,000 | — | — |
| 29 Jun 2011 | Phillips | Tornado | EF1 | $300,000 | — | — |
| 15 May 2011 | Forecast zone | High Wind | 60 mph | $135,000 | — | — |
| 21 May 2011 | Rosebud | Flood | — | $225,000 | — | — |
| 24 May 2011 | Park | Flood | — | $130,000 | — | — |
| 19 May 2011 | Fergus | Flood | — | $125,000 | — | — |
| 23 May 2011 | Powder River | Flood | — | $120,000 | — | — |
| 20 May 2011 | Prairie | Tornado | EF1 | $75,000 | — | — |
| 19 May 2011 | Judith Basin | Flood | — | $50,000 | — | — |
| 23 May 2011 | Golden Valley | Flood | — | $50,000 | — | — |
| 6 Jun 2011 | Yellowstone | Tornado | EF0 | — | — | — |
| 9 Aug 2011 | Park | Tornado | EF0 | — | — | — |
| 29 Jun 2011 | Valley | Tornado | EF0 | — | — | — |
| 6 Jun 2011 | Yellowstone | Tornado | EF0 | — | — | — |
| 1 Sep 2011 | Lake | Tornado | EF0 | — | — | — |
| 29 Jul 2011 | Richland | Tornado | EF0 | — | — | — |
| 12 Jun 2011 | Carter | Tornado | EF1 | — | — | — |
Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.
Federal disaster declarations in 2011
| Declared | Number | Type | Incident | Title | Counties |
|---|---|---|---|---|---|
| 29 Aug 2011 | FM-2950 | Fire management assistance | Fire | Canyon Creek Fire | 1 |
| 17 Jun 2011 | DR-1996 | Major disaster | Severe Storm | Severe Storms And Flooding | 49 |
Flood insurance claims with a 2011 date of loss
460 NFIP claims, 326 of them paid, for $4,271,510.
Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (1 Oct 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 1 Oct 2026.