Unnamed tropical depression (1977)
Unnamed tropical depression peaked at 25 kt in the Eastern Pacific between July 25, 1977 and July 25, 1977.
Track and intensity
The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 1977 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 25, 1977 to July 25, 1977
- Peak strength
- Tropical Depression, 25 kt (29 mph)
- Landfall
- No; closest approach 2169 km (1348 mi)
- Accumulated cyclone energy
- 0.0
- Fastest the center moved
- 17 kt (20 mph)
- Identifier
- EP081977
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.
Rainfall
The Weather Prediction Center attributes 845 rain gauge totals over the contiguous United States to this storm. The wettest reached 8.30 inches (211 mm).
| Station | Total | Position |
|---|---|---|
| NOGALES | 8.30 in (211 mm) | 31.35N 110.92W |
| NOGALES 6 N | 7.80 in (198 mm) | 31.45N 110.97W |
| PATAGONIA #2 | 7.64 in (194 mm) | 31.55N 110.75W |
| Y LIGHTNING RANCH | 5.82 in (148 mm) | 31.45N 110.23W |
| BISBEE 2 | 5.75 in (146 mm) | 31.43N 109.90W |
| CORONADO N M HDQTRS | 5.52 in (140 mm) | 31.35N 110.25W |
| ARIVACA | 5.39 in (137 mm) | 31.57N 111.33W |
| DOUGLAS BISBEE-DOUGLAS INTL A | 5.03 in (128 mm) | 31.47N 109.60W |
| FORT HUACHUCA | 5.01 in (127 mm) | 31.57N 110.33W |
| STEPHENS RANCH | 5.00 in (127 mm) | 31.40N 109.20W |
| CANELO 1 NW | 4.90 in (124 mm) | 31.57N 110.53W |
| DOUGLAS | 4.13 in (105 mm) | 31.35N 109.53W |
WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.
Track
| Time (UTC) | Position | Wind | Pressure | Status |
|---|---|---|---|---|
| Jul 25, 00:00 | 11.8N 135.0W | 25 kt | Tropical storm | |
| Jul 25, 06:00 | 11.5N 135.7W | 25 kt | Tropical storm | |
| Jul 25, 12:00 | 11.2N 136.5W | 25 kt | Disturbance |
Other Eastern Pacific storms of 1977
- Tropical Storm AvaEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Tropical Storm BerniceEastern Pacific · 1977
- Hurricane ClaudiaEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Hurricane DoreenEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Tropical Storm EmilyEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
- Hurricane FlorenceEastern Pacific · 1977
- Tropical Storm GlendaEastern Pacific · 1977
- Unnamed tropical depressionEastern Pacific · 1977
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.