Tropical Storm Therese (1970)
Tropical Storm Therese peaked at 40 kt in the Eastern Pacific between July 30, 1970 and August 4, 1970, with a lowest pressure of 990 mb.
Track and intensity
The whole track of Tropical Storm Therese, colored by strength, with the other storms of the 1970 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 30, 1970 to August 4, 1970
- Peak strength
- Tropical Storm, 40 kt (46 mph)
- Lowest pressure
- 990 mb (29.23 inHg)
- Landfall
- No; closest approach 666 km (414 mi)
- Accumulated cyclone energy
- 0.6
- Identifier
- WP061970
Deaths and damage
No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Jul 30, 00:00 | 26.9N 182.5E | Disturbance | ||
| Jul 30, 06:00 | 26.9N 181.5E | Disturbance | ||
| Jul 30, 12:00 | 26.9N 180.1E | Disturbance | ||
| Jul 30, 18:00 | 26.9N 178.3E | Disturbance | ||
| Jul 31, 00:00 | 27.0N 176.6E | Disturbance | ||
| Jul 31, 06:00 | 27.1N 175.7E | Disturbance | ||
| Jul 31, 12:00 | 27.2N 175.0E | Disturbance | ||
| Jul 31, 18:00 | 27.4N 174.1E | Disturbance | ||
| Aug 1, 00:00 | 27.5N 173.1E | 1014 mb | Mixed | |
| Aug 1, 06:00 | 27.8N 172.4E | 1010 mb | Mixed | |
| Aug 1, 12:00 | 28.2N 171.7E | 1006 mb | Tropical storm | |
| Aug 1, 18:00 | 28.7N 171.1E | 1002 mb | Tropical storm | |
| Aug 2, 00:00 | 29.5N 170.4E | 1000 mb | Tropical storm | |
| Aug 2, 06:00 | 30.5N 169.3E | 996 mb | Tropical storm | |
| Aug 2, 12:00 | 31.8N 168.0E | 994 mb | Tropical storm | |
| Aug 2, 18:00 | 33.0N 166.6E | 990 mb | Tropical storm | |
| Aug 3, 00:00 | 34.4N 165.5E | 40 kt | 990 mb | Tropical storm |
| Aug 3, 06:00 | 37.2N 166.2E | 40 kt | 990 mb | Tropical storm |
| Aug 3, 12:00 | 39.7N 167.9E | 40 kt | 995 mb | Tropical storm |
| Aug 3, 18:00 | 42.2N 169.8E | 35 kt | 1000 mb | Tropical storm |
| Aug 4, 00:00 | 44.6N 170.9E | 30 kt | 1002 mb | Tropical storm |
| Aug 4, 06:00 | 49.8N 169.4E | 1002 mb | Mixed | |
| Aug 4, 12:00 | 52.9N 172.1E | 1002 mb | Extratropical | |
| Aug 4, 18:00 | 56.0N 180.0E | 1008 mb | Extratropical |
Other Eastern Pacific storms of 1970
- Hurricane AdeleEastern Pacific · 1970
- Tropical Storm BlancaEastern Pacific · 1970
- Tropical Storm ConnieEastern Pacific · 1970
- Tropical Storm EileenEastern Pacific · 1970
- Hurricane FrancescaEastern Pacific · 1970
- Tropical Storm GretchenEastern Pacific · 1970
- Tropical Storm HelgaEastern Pacific · 1970
- Tropical Storm IoneEastern Pacific · 1970
- Tropical Storm IoneEastern Pacific · 1970
- Tropical Storm JoyceEastern Pacific · 1970
- Tropical Storm KristenEastern Pacific · 1970
- Hurricane LorraineEastern Pacific · 1970
- Tropical Storm MaggieEastern Pacific · 1970
- Tropical Storm NormaEastern Pacific · 1970
- Hurricane DotEastern Pacific · 1970
- Tropical Storm OrleneEastern Pacific · 1970
- Hurricane PatriciaEastern Pacific · 1970
- Tropical Storm RosalieEastern Pacific · 1970
- Tropical Storm SelmaEastern Pacific · 1970
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.