The 2009 season

Tropical Storm Hilda (2009)

Tropical Storm Hilda peaked at 55 kt in the Eastern Pacific between August 20, 2009 and August 31, 2009, with a lowest pressure of 995 mb.

Track and intensity

The whole track of Tropical Storm Hilda, 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.

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The storm

Basin
Eastern Pacific
Dates
August 20, 2009 to August 31, 2009
Peak strength
Tropical Storm, 55 kt (63 mph)
Lowest pressure
995 mb (29.38 inHg)
Landfall
No; closest approach 577 km (359 mi)
Accumulated cyclone energy
3.5
Tropical-storm-force wind reached
70 nmi (130 km, 81 mi) from the center at its widest
Eyewall radius at its peak
20 nmi (37 km, 23 mi)
Overall size
200 nmi (370 km, 230 mi) to the outermost closed isobar
Peak gust in the best track
65 kt (75 mph)
Fastest the center moved
17 kt (20 mph)
Identifier
EP112009

Deaths and damage

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

Track

Time (UTC)PositionWindPressureStatus
Aug 20, 12:0013.3N 129.7W25 kt1009 mbDisturbance
Aug 20, 18:0013.3N 130.5W25 kt1009 mbDisturbance
Aug 21, 00:0013.3N 131.4W25 kt1009 mbDisturbance
Aug 21, 06:0013.3N 132.2W25 kt1009 mbDisturbance
Aug 21, 12:0013.5N 133.0W25 kt1009 mbLow
Aug 21, 18:0013.5N 133.8W25 kt1008 mbLow
Aug 22, 00:0013.6N 134.6W25 kt1008 mbLow
Aug 22, 06:0013.6N 135.5W25 kt1008 mbLow
Aug 22, 12:0013.5N 136.4W30 kt1006 mbTropical depression
Aug 22, 18:0013.5N 137.3W35 kt1005 mbTropical storm
Aug 23, 00:0013.5N 138.1W35 kt1005 mbTropical storm
Aug 23, 06:0013.6N 138.9W40 kt1003 mbTropical storm
Aug 23, 12:0013.8N 140.0W40 kt1003 mbTropical storm
Aug 23, 18:0013.9N 141.2W45 kt1000 mbTropical storm
Aug 24, 00:0014.0N 142.5W50 kt998 mbTropical storm
Aug 24, 06:0014.2N 143.6W55 kt995 mbTropical storm
Aug 24, 12:0014.5N 144.6W55 kt995 mbTropical storm
Aug 24, 18:0014.8N 145.5W55 kt995 mbTropical storm
Aug 25, 00:0014.9N 146.4W50 kt997 mbTropical storm
Aug 25, 06:0014.7N 147.2W50 kt997 mbTropical storm
Aug 25, 12:0014.4N 147.9W50 kt997 mbTropical storm
Aug 25, 18:0014.1N 148.6W45 kt999 mbTropical storm
Aug 26, 00:0013.8N 149.1W40 kt1001 mbTropical storm
Aug 26, 06:0013.5N 149.6W40 kt1002 mbTropical storm
Aug 26, 12:0013.3N 150.2W40 kt1003 mbTropical storm
Aug 26, 18:0013.2N 150.8W35 kt1004 mbTropical storm
Aug 27, 00:0013.3N 151.4W30 kt1005 mbTropical depression
Aug 27, 06:0013.6N 152.2W30 kt1005 mbTropical depression
Aug 27, 12:0013.7N 153.1W30 kt1006 mbTropical depression
Aug 27, 18:0013.7N 154.2W30 kt1006 mbTropical depression
Aug 28, 00:0013.7N 155.3W30 kt1006 mbTropical depression
Aug 28, 06:0013.8N 156.5W30 kt1006 mbTropical depression
Aug 28, 12:0013.9N 157.8W30 kt1006 mbTropical depression
Aug 28, 18:0014.0N 159.2W25 kt1007 mbLow
Aug 29, 00:0014.2N 160.8W25 kt1007 mbLow
Aug 29, 06:0014.6N 162.4W25 kt1007 mbLow
Aug 29, 12:0015.1N 163.9W25 kt1007 mbLow
Aug 29, 18:0015.3N 165.5W25 kt1007 mbLow
Aug 30, 00:0015.5N 167.0W25 kt1007 mbLow
Aug 30, 06:0015.7N 168.7W25 kt1007 mbLow
Aug 30, 12:0015.8N 170.4W25 kt1007 mbLow
Aug 30, 18:0016.0N 172.1W25 kt1007 mbLow
Aug 31, 00:0016.2N 173.8W25 kt1007 mbLow
Aug 31, 06:0016.4N 175.2W20 kt1008 mbLow
Aug 31, 12:0016.6N 176.4W20 kt1008 mbLow
Aug 31, 18:0016.8N 177.4W20 kt1008 mbLow

Other Eastern Pacific storms of 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.