Tropical Storm Blas (2004)
Tropical Storm Blas peaked at 55 kt in the Eastern Pacific between July 12, 2004 and July 19, 2004, with a lowest pressure of 991 mb.
Track and intensity
The whole track of Tropical Storm Blas, colored by strength, with the other storms of the 2004 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.
The storm
- Basin
- Eastern Pacific
- Dates
- July 12, 2004 to July 19, 2004
- Peak strength
- Tropical Storm, 55 kt (63 mph)
- Lowest pressure
- 991 mb (29.26 inHg)
- Landfall
- No; closest approach 432 km (268 mi)
- Accumulated cyclone energy
- 1.6
- Tropical-storm-force wind reached
- 200 nmi (370 km, 230 mi) from the center at its widest
- Peak gust in the best track
- 60 kt (69 mph)
- Fastest the center moved
- 18 kt (21 mph)
- Identifier
- EP032004
Deaths and damage
The sources count different things and are not added together.
NOAA Storm Events
0 deaths (0 direct, 0 indirect)$3,000
What National Weather Service offices recorded county by county in 1 states and marine areas, in the United States only. Property and crop damage as each office estimated it, which is not a national loss total.
In the United States
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
- $3,000
- Crop damage
- none recorded
- Events recorded
- 2 in 2 reports from 1 states and marine areas
State by state
| State or marine area | Deaths | Injuries | Damage | Events |
|---|---|---|---|---|
| Arizona | 0 | 0 | $3,000 | 2 |
What was recorded
1 thunderstorm wind, 1 flash flood.
Wind reports
The strongest winds National Weather Service offices recorded with this storm. An estimated figure is a forecaster’s judgment from the damage, not an instrument reading.
| Wind | How | Where | State | Time (UTC) |
|---|---|---|---|---|
| 52 kt (60 mph) | Estimated | GREEN VLY | Arizona | Jul 13, 23:33 |
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Jul 12, 12:00 | 14.6N 105.5W | 30 kt | 1006 mb | Tropical depression |
| Jul 12, 18:00 | 15.5N 106.8W | 35 kt | 1002 mb | Tropical storm |
| Jul 13, 00:00 | 16.4N 108.0W | 45 kt | 997 mb | Tropical storm |
| Jul 13, 06:00 | 17.3N 109.3W | 50 kt | 994 mb | Tropical storm |
| Jul 13, 12:00 | 18.4N 110.8W | 55 kt | 991 mb | Tropical storm |
| Jul 13, 18:00 | 19.6N 112.2W | 50 kt | 994 mb | Tropical storm |
| Jul 14, 00:00 | 20.7N 113.7W | 45 kt | 997 mb | Tropical storm |
| Jul 14, 06:00 | 21.5N 115.1W | 40 kt | 999 mb | Tropical storm |
| Jul 14, 12:00 | 22.1N 116.6W | 35 kt | 1002 mb | Tropical storm |
| Jul 14, 18:00 | 22.5N 117.9W | 30 kt | 1004 mb | Tropical depression |
| Jul 15, 00:00 | 22.9N 119.2W | 30 kt | 1005 mb | Tropical depression |
| Jul 15, 06:00 | 23.2N 120.4W | 30 kt | 1006 mb | Low |
| Jul 15, 12:00 | 23.4N 121.4W | 25 kt | 1007 mb | Low |
| Jul 15, 18:00 | 23.6N 122.3W | 25 kt | 1008 mb | Low |
| Jul 16, 00:00 | 23.8N 123.3W | 25 kt | 1008 mb | Low |
| Jul 16, 06:00 | 24.0N 124.5W | 25 kt | 1008 mb | Low |
| Jul 16, 12:00 | 24.1N 125.5W | 20 kt | 1008 mb | Low |
| Jul 16, 18:00 | 24.2N 126.3W | 20 kt | 1008 mb | Low |
| Jul 17, 00:00 | 24.4N 127.0W | 20 kt | 1009 mb | Low |
| Jul 17, 06:00 | 24.8N 127.5W | 20 kt | 1009 mb | Low |
| Jul 17, 12:00 | 25.2N 127.8W | 20 kt | 1009 mb | Low |
| Jul 17, 18:00 | 25.6N 128.1W | 15 kt | 1010 mb | Low |
| Jul 18, 00:00 | 26.0N 128.3W | 15 kt | 1010 mb | Low |
| Jul 18, 06:00 | 26.4N 128.4W | 15 kt | 1011 mb | Low |
| Jul 18, 12:00 | 26.7N 128.2W | 15 kt | 1012 mb | Low |
| Jul 18, 18:00 | 26.9N 127.9W | 15 kt | 1013 mb | Low |
| Jul 19, 00:00 | 26.9N 127.6W | 15 kt | 1014 mb | Low |
| Jul 19, 06:00 | 26.9N 127.3W | 15 kt | 1015 mb | Low |
Other Eastern Pacific storms of 2004
- Tropical Storm AgathaEastern Pacific · 2004
- Unnamed tropical depressionEastern Pacific · 2004
- Unnamed tropical depressionEastern Pacific · 2004
- Hurricane CeliaEastern Pacific · 2004
- Hurricane DarbyEastern Pacific · 2004
- Unnamed tropical depressionEastern Pacific · 2004
- Tropical Storm EstelleEastern Pacific · 2004
- Hurricane FrankEastern Pacific · 2004
- Unnamed tropical depressionEastern Pacific · 2004
- Tropical Storm GeorgetteEastern Pacific · 2004
- Hurricane HowardEastern Pacific · 2004
- Hurricane IsisEastern Pacific · 2004
- Hurricane JavierEastern Pacific · 2004
- Tropical Storm KayEastern Pacific · 2004
- Tropical Storm LesterEastern Pacific · 2004
- Unnamed tropical depressionEastern Pacific · 2004
What this means
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.
Sources
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.
The National Hurricane Center has published no tropical cyclone report for this storm.