2023 tropical cyclone season · eastern North Pacific

Hurricane Greg Greg · EP082023

Hurricane Greg was tracked in the eastern North Pacific from 2023-08-14 to 2023-08-18 (5 days), peaking at 45 kt (TS) with a minimum pressure of 1000 hPa. 109 archived forecasts from NHC, ECMWF, ECMWF ENS, GFS, GEFS are verified against its best track; at 48 hours the closest was ECMWF, 61 km off on average.

Open the interactive storm map →

ATCF ID
EP082023
Basin
eastern North Pacific
Tracked
2023-08-14 → 2023-08-18 (5 days)
Peak wind
45 kt · 23 m/s · TS
Minimum pressure
1000 hPa
Archived forecasts
109
Sources
NHC · ECMWF · ECMWF ENS · GFS · GEFS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
NHC61 (14)85 (10)103 (6)—
ECMWF42 (12)61 (10)89 (5)—
ECMWF ENS47 (13)62 (10)101 (6)—
GFS59 (14)106 (10)119 (6)—
GEFS51 (14)80 (10)87 (6)—

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
2023-08-14 00Z11.3°N 138.2°W301007TD
2023-08-14 06Z11.3°N 139.2°W351005TS
2023-08-14 12Z11.3°N 140.4°W351005TS
2023-08-14 18Z11.2°N 141.5°W401005TS
2023-08-15 00Z11.1°N 142.7°W401002TS
2023-08-15 06Z11.1°N 144.0°W451000TS
2023-08-15 12Z11.1°N 145.2°W451000TS
2023-08-15 18Z11.1°N 146.5°W451000TS
2023-08-16 00Z11.3°N 147.7°W451000TS
2023-08-16 06Z11.6°N 149.1°W451000TS
2023-08-16 12Z11.7°N 150.5°W451000TS
2023-08-16 18Z11.8°N 151.8°W401004TS
2023-08-17 00Z12.0°N 152.9°W401004TS
2023-08-17 06Z12.1°N 153.9°W401004TS
2023-08-17 12Z12.0°N 155.1°W351006TS
2023-08-17 18Z12.2°N 156.3°W301007TD
2023-08-18 00Z12.1°N 157.8°W301007TD
2023-08-18 06Z12.1°N 157.8°W301008TD
2023-08-18 12Z11.4°N 160.7°W301008TD
2023-08-18 18Z11.0°N 162.0°W301008TD