The 2018 season

Unnamed tropical depression (2018)

Unnamed tropical depression peaked at 30 kt in the Eastern Pacific between September 19, 2018 and September 20, 2018, with a lowest pressure of 1002 mb, and made landfall.

Track and intensity

The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 2018 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.

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The storm

Basin
Eastern Pacific
Dates
September 19, 2018 to September 20, 2018
Peak strength
Tropical Depression, 30 kt (35 mph)
Lowest pressure
1002 mb (29.59 inHg)
Landfall
Yes
Accumulated cyclone energy
0.0
Eyewall radius at its peak
40 nmi (74 km, 46 mi)
Overall size
170 nmi (315 km, 196 mi) to the outermost closed isobar
Peak gust in the best track
40 kt (46 mph)
Fastest the center moved
9 kt (10 mph)
Identifier
EP192018

Deaths and damage

No source this site reads carries a casualty or damage figure for this storm.

Landfall

Time (UTC)WherePositionWindPressure
Sep 20, 03:00Empalme, Sonora, Mexico, 45 km away27.6N 110.6W30 kt (35 mph)1002 mb

Landfall points the US agencies flagged in the best track. The nearest town is named from the site’s gazetteer, not from the report.

Track

Time (UTC)PositionWindPressureStatus
Sep 19, 12:0026.1N 111.3W25 kt1004 mbTropical depression
Sep 19, 18:0026.7N 111.2W30 kt1003 mbTropical depression
Sep 20, 00:0027.3N 110.9W30 kt1002 mbTropical depression
Sep 20, 03:00 landfall27.6N 110.6W30 kt1002 mbTropical depression
Sep 20, 06:0027.9N 110.2W25 kt1003 mbTropical depression

Other Eastern Pacific storms of 2018

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.