Super Typhoon Dianmu (2004)

Basin

Western Pacific

Dates

June 11, 2004 to June 28, 2004

Peak strength

Category 5, 155 kt (178 mph)

Lowest pressure

879 mb (25.96 inHg)

Landfall

Yes

Accumulated cyclone energy

37.6

Tropical-storm-force wind reached

220 nmi (407 km, 253 mi) from the center at its widest

Hurricane-force wind reached

70 nmi (130 km, 81 mi) from the center at its widest

Overall size

220 nmi (407 km, 253 mi) to the outermost closed isobar

Peak gust in the best track

190 kt (219 mph)

Fastest the center moved

36 kt (41 mph)

Identifier

WP092004

Radar at RODN as it neared land, Jun 19, 18:00 UTC

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

0

Property damage

none recorded

Crop damage

none recorded

Events recorded

2 in 1 reports from 1 states and marine areas

State by state

What was recorded

2 tropical storm.

• Unnamed tropical stormWestern Pacific · 2004Tropical Storm40 kt · 994 mb
• Unnamed tropical stormWestern Pacific · 2004Tropical Storm35 kt · 997 mb
• Super Typhoon SudalWestern Pacific · 2004Cat 4130 kt · 910 mb
• Super Typhoon NidaWestern Pacific · 2004Cat 5140 kt · 898 mb
• Unnamed tropical stormWestern Pacific · 2004Tropical Storm35 kt · 997 mb
• Tropical Storm OmaisWestern Pacific · 2004Tropical Storm60 kt · 980 mb
• Typhoon ConsonWestern Pacific · 2004Cat 3100 kt · 944 mb
• Typhoon ChanthuWestern Pacific · 2004Cat 175 kt · 967 mb
• Typhoon MindulleWestern Pacific · 2004Cat 4125 kt · 916 mb
• Typhoon TingtingWestern Pacific · 2004Cat 180 kt · 963 mb
• Tropical Storm KompasuWestern Pacific · 2004Tropical Storm45 kt · 991 mb
• Typhoon NamtheunWestern Pacific · 2004Cat 4115 kt · 927 mb
• Unnamed tropical depressionWestern Pacific · 2004Tropical Depression
• Tropical Storm MalouWestern Pacific · 2004Tropical Storm35 kt · 997 mb
• Typhoon MerantiWestern Pacific · 2004Cat 290 kt · 954 mb
• Typhoon RananimWestern Pacific · 2004Cat 290 kt · 954 mb
• Tropical Storm MalakasWestern Pacific · 2004Tropical Storm35 kt · 994 mb
• Typhoon MegiWestern Pacific · 2004Cat 165 kt · 976 mb
• Super Typhoon ChabaWestern Pacific · 2004Cat 5155 kt · 879 mb
• Typhoon AereWestern Pacific · 2004Cat 290 kt · 954 mb
• Unnamed tropical depressionWestern Pacific · 2004Tropical Depression30 kt · 1000 mb
• Typhoon SongdaWestern Pacific · 2004Cat 4125 kt · 916 mb
• Tropical Storm SarikaWestern Pacific · 2004Tropical Storm60 kt · 980 mb
• Tropical Storm HaimaWestern Pacific · 2004Tropical Storm35 kt · 992 mb
• Typhoon MeariWestern Pacific · 2004Cat 4125 kt · 916 mb
• Super Typhoon Ma-OnWestern Pacific · 2004Cat 5140 kt · 898 mb
• Typhoon TokageWestern Pacific · 2004Cat 4125 kt · 916 mb
• Typhoon Nock-TenWestern Pacific · 2004Cat 3110 kt · 933 mb
• Typhoon MuifaWestern Pacific · 2004Cat 4115 kt · 927 mb
• Tropical Storm MerbokWestern Pacific · 2004Tropical Storm35 kt · 1000 mb
• Super Typhoon NanmadolWestern Pacific · 2004Cat 4130 kt · 910 mb
• Tropical Storm TalasWestern Pacific · 2004Tropical Storm50 kt · 987 mb
• Tropical Storm NoruWestern Pacific · 2004Tropical Storm55 kt · 984 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Wikipedia article: Typhoon Dianmu