Tropical Storm Olaf (2009)
Tropical Storm Olaf peaked at 40 kt in the Eastern Pacific between September 28, 2009 and October 4, 2009, with a lowest pressure of 996 mb, and made landfall.
Track and intensity
The whole track of Tropical Storm Olaf, colored by strength, with the other storms of the 2009 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
- September 28, 2009 to October 4, 2009
- Peak strength
- Tropical Storm, 40 kt (46 mph)
- Lowest pressure
- 996 mb (29.41 inHg)
- Landfall
- Yes
- Accumulated cyclone energy
- 0.8
- Tropical-storm-force wind reached
- 100 nmi (185 km, 115 mi) from the center at its widest
- Eyewall radius at its peak
- 60 nmi (111 km, 69 mi)
- Overall size
- 325 nmi (602 km, 374 mi) to the outermost closed isobar
- Peak gust in the best track
- 50 kt (58 mph)
- Fastest the center moved
- 22 kt (25 mph)
- Identifier
- EP182009
Deaths and damage
The sources count different things and are not added together.
NOAA Storm Events
0 deaths (0 direct, 0 indirect)none recorded
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
- none recorded
- Crop damage
- none recorded
- Events recorded
- 18 in 1 reports from 1 states and marine areas
State by state
| State or marine area | Deaths | Injuries | Damage | Events |
|---|---|---|---|---|
| Texas | 0 | 0 | 18 |
What was recorded
16 flash flood, 2 hail.
What forecast offices wrote
From the Storm Events narratives, unedited.
Emergency management reported several roads with high water including portions of FM 535, 812, and FM 20. Some of these roads were closed due to the flooding.
Bastrop, Texas · Flash Flood · Oct 3, 22:14 UTC
County Road 465 near Santa Clara was closed due to flooding. Other county roads were closed in the county including county roads 775, 539, and 467.
Guadalupe, Texas · Flash Flood · Oct 4, 15:12 UTC
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Sep 28, 00:00 | 15.4N 103.5W | 20 kt | 1009 mb | Disturbance |
| Sep 28, 06:00 | 15.5N 104.1W | 20 kt | 1009 mb | Disturbance |
| Sep 28, 12:00 | 15.6N 104.8W | 20 kt | 1009 mb | Disturbance |
| Sep 28, 18:00 | 15.8N 105.4W | 20 kt | 1009 mb | Disturbance |
| Sep 29, 00:00 | 16.0N 106.0W | 20 kt | 1006 mb | Disturbance |
| Sep 29, 06:00 | 16.4N 107.0W | 20 kt | 1006 mb | Disturbance |
| Sep 29, 12:00 | 16.7N 108.1W | 20 kt | 1006 mb | Disturbance |
| Sep 29, 18:00 | 17.8N 110.1W | 25 kt | 1006 mb | Disturbance |
| Sep 30, 00:00 | 18.5N 111.5W | 25 kt | 1005 mb | Disturbance |
| Sep 30, 06:00 | 18.9N 112.9W | 25 kt | 1005 mb | Disturbance |
| Sep 30, 12:00 | 18.9N 114.1W | 25 kt | 1005 mb | Disturbance |
| Sep 30, 18:00 | 18.7N 115.2W | 25 kt | 1005 mb | Disturbance |
| Oct 1, 00:00 | 18.7N 116.2W | 25 kt | 1005 mb | Disturbance |
| Oct 1, 06:00 | 18.7N 117.1W | 25 kt | 1005 mb | Disturbance |
| Oct 1, 12:00 | 19.0N 117.3W | 30 kt | 1003 mb | Tropical depression |
| Oct 1, 18:00 | 19.6N 117.4W | 35 kt | 1000 mb | Tropical storm |
| Oct 2, 00:00 | 20.4N 117.4W | 40 kt | 997 mb | Tropical storm |
| Oct 2, 06:00 | 21.5N 117.4W | 40 kt | 996 mb | Tropical storm |
| Oct 2, 12:00 | 22.6N 117.5W | 40 kt | 996 mb | Tropical storm |
| Oct 2, 18:00 | 23.3N 117.5W | 35 kt | 997 mb | Tropical storm |
| Oct 3, 00:00 | 23.8N 117.3W | 35 kt | 997 mb | Tropical storm |
| Oct 3, 06:00 | 24.0N 116.7W | 30 kt | 998 mb | Tropical depression |
| Oct 3, 12:00 | 23.9N 115.6W | 30 kt | 998 mb | Tropical depression |
| Oct 3, 18:00 | 23.8N 114.3W | 30 kt | 999 mb | Low |
| Oct 4, 00:00 | 23.9N 113.0W | 25 kt | 1000 mb | Low |
| Oct 4, 06:00 | 24.2N 111.8W | 25 kt | 1002 mb | Low |
| Oct 4, 12:00 | 24.5N 111.2W | 25 kt | 1003 mb | Low |
Other Eastern Pacific storms of 2009
- Unnamed tropical depressionEastern Pacific · 2009
- Hurricane AndresEastern Pacific · 2009
- Tropical Storm BlancaEastern Pacific · 2009
- Hurricane CarlosEastern Pacific · 2009
- Tropical Storm DoloresEastern Pacific · 2009
- Tropical Storm LanaEastern Pacific · 2009
- Hurricane FeliciaEastern Pacific · 2009
- Tropical Storm EnriqueEastern Pacific · 2009
- Unnamed tropical depressionEastern Pacific · 2009
- Tropical Storm MakaEastern Pacific · 2009
- Hurricane GuillermoEastern Pacific · 2009
- Tropical Storm HildaEastern Pacific · 2009
- Tropical Storm IgnacioEastern Pacific · 2009
- Unnamed tropical depressionEastern Pacific · 2009
- Tropical Storm KevinEastern Pacific · 2009
- Hurricane JimenaEastern Pacific · 2009
- Hurricane LindaEastern Pacific · 2009
- Tropical Storm MartyEastern Pacific · 2009
- Tropical Storm NoraEastern Pacific · 2009
- Tropical Storm PatriciaEastern Pacific · 2009
- Hurricane RickEastern Pacific · 2009
- Hurricane NekiEastern Pacific · 2009
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.