Montana, 1998
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 1998 was 621 against 601 in 1997.
Counties with the most recorded events
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 18 Sep 1998 | Petroleum | Lightning | — | — | 1 | 1 |
| 8 Jul 1998 | Missoula | Lightning | — | — | 1 | 1 |
| 10 Jul 1998 | Missoula | Thunderstorm Wind | 69 mph | $260,000 | 1 | — |
| 15 Nov 1998 | Beaverhead | Avalanche | — | — | 1 | — |
| 18 Jan 1998 | Forecast zone | Avalanche | — | — | 1 | — |
| 25 Feb 1998 | Sheridan | Blizzard | — | — | 1 | — |
| 11 Jul 1998 | Deer Lodge | Thunderstorm Wind | 69 mph | — | — | 2 |
| 2 Oct 1998 | Yellowstone | Lightning | — | $10,000 | — | 1 |
| 29 May 1998 | Lincoln | Thunderstorm Wind | 60 mph | — | — | 1 |
| 28 Mar 1998 | Forecast zone | Heavy Snow | — | — | — | 1 |
| 27 Jul 1998 | Yellowstone | Thunderstorm Wind | 60 mph | — | — | 1 |
| 31 Jul 1998 | Yellowstone | Hail | 1.25 in | $8,000,000 | — | — |
| 4 Jul 1998 | Yellowstone | Hail | 1.75 in | $4,000,000 | — | — |
| 4 Jul 1998 | Yellowstone | Hail | 2.50 in | $2,000,000 | — | — |
| 4 Jul 1998 | Roosevelt | Flash Flood | — | $1,000,000 | — | — |
| 4 Jul 1998 | Custer | Flash Flood | — | $1,000,000 | — | — |
| 17 Jul 1998 | Carbon | Wildfire | — | $525,000 | — | — |
| 27 Jun 1998 | Hill | Flash Flood | — | $233,000 | — | — |
| 23 Aug 1998 | Treasure | Tornado | F0 | $200,000 | — | — |
| 17 Jul 1998 | Rosebud | Wildfire | — | $200,000 | — | — |
| 3 Jul 1998 | Musselshell | Flash Flood | — | $200,000 | — | — |
| 4 Jul 1998 | Roosevelt | Tornado | F1 | $100,000 | — | — |
| 23 Aug 1998 | Treasure | Tornado | F0 | $100,000 | — | — |
| 2 Jul 1998 | Jefferson | Flash Flood | — | $100,000 | — | — |
| 5 Jul 1998 | Big Horn | Hail | 2.75 in | $100,000 | — | — |
| 23 Jun 1998 | Roosevelt | Flash Flood | — | $50,000 | — | — |
| 19 Jun 1998 | Chouteau | Tornado | F1 | $50,000 | — | — |
| 23 Jun 1998 | Powder River | Thunderstorm Wind | — | $50,000 | — | — |
| 4 Jul 1998 | Roosevelt | Tornado | F1 | $12,000 | — | — |
| 23 Aug 1998 | Fergus | Tornado | F1 | $35,000 | — | — |
| 3 Jul 1998 | Cascade | Tornado | F1 | $28,000 | — | — |
| 23 Aug 1998 | Fergus | Tornado | F0 | $4,000 | — | — |
| 23 Aug 1998 | Fergus | Tornado | F0 | — | — | — |
| 14 Aug 1998 | Judith Basin | Tornado | F0 | — | — | — |
| 4 Jul 1998 | Yellowstone | Tornado | F0 | — | — | — |
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 1998
No declaration touching Montana was made in 1998.
Flood insurance claims with a 1998 date of loss
15 NFIP claims, 7 of them paid, for $32,047.
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.