2023 tropical cyclone season · eastern North Pacific

Hurricane Hilary Hilary · EP092023

Hurricane Hilary was tracked in the eastern North Pacific from 2023-08-16 to 2023-08-20 (5 days), peaking at 120 kt (H4) with a minimum pressure of 940 hPa. 122 archived forecasts from NHC, ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF, 67 km off on average.

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ATCF ID
EP092023
Basin
eastern North Pacific
Tracked
2023-08-16 → 2023-08-20 (5 days)
Peak wind
120 kt · 62 m/s · H4
Minimum pressure
940 hPa
Archived forecasts
122
Sources
NHC · ECMWF · ECMWF ENS · GFS · GEFS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
NHC47 (14)75 (10)159 (6)—
ECMWF42 (14)67 (10)228 (6)—
ECMWF ENS43 (14)81 (10)238 (6)—
GFS47 (15)98 (11)187 (7)—
GEFS43 (15)80 (11)168 (7)—

Mean great-circle distance to the best track at each lead time, counted while the system was a tropical or subtropical cyclone; the number of cases is in brackets.

Best track

Six-hourly positions of the US best track (JTWC / NHC, one-minute winds); grades on the Saffir–Simpson scale.

Time (UTC)PositionWind (kt)Pressure (hPa)Grade
2023-08-16 06Z11.9°N 100.8°W301003TD
2023-08-16 12Z12.6°N 102.3°W351002TS
2023-08-16 18Z12.9°N 103.8°W401000TS
2023-08-17 00Z13.5°N 104.9°W45997TS
2023-08-17 06Z14.4°N 105.8°W60989TS
2023-08-17 12Z15.2°N 107.2°W75978H1
2023-08-17 18Z15.8°N 108.4°W90965H2
2023-08-18 00Z16.4°N 109.5°W105952H3
2023-08-18 06Z16.8°N 110.4°W120940H4
2023-08-18 12Z17.3°N 111.1°W115944H4
2023-08-18 18Z18.2°N 111.9°W110947H3
2023-08-19 00Z19.2°N 112.6°W115943H4
2023-08-19 06Z20.2°N 113.1°W115943H4
2023-08-19 12Z21.5°N 113.5°W100952H3
2023-08-19 18Z22.9°N 113.9°W85960H2
2023-08-20 00Z24.3°N 114.3°W75968H1
2023-08-20 06Z26.3°N 114.9°W65974H1
2023-08-20 12Z28.1°N 115.3°W55981TS
2023-08-20 18Z30.3°N 115.7°W50992TS