> For the complete documentation index, see [llms.txt](https://docs.jua.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jua.ai/models-and-products/dissemination-times.md). # Dissemination Times This page provides the dissemination times for all Jua weather model products. ## EPT-1.5 Family ### EPT-1.5 | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | | 00:00 | 05:40 | 05:50 | 05:57 | 06:05 | | 06:00 | 11:40 | 11:50 | 11:57 | 12:05 | | 12:00 | 17:40 | 17:50 | 17:57 | 19:05 | | 18:00 | 23:40 | 23:50 | 23:57 | 01:05 | ### EPT-1.5 Early | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | | 00:00 | 03:15 | 03:25 | 03:35 | 03:40 | | 06:00 | 09:15 | 09:25 | 09:35 | 09:40 | | 12:00 | 15:15 | 15:25 | 15:35 | 15:40 | | 18:00 | 21:15 | 21:25 | 21:35 | 21:40 | ## EPT-2 Family The first 10 days are in hourly resolution. Between day 10 and 20 in 6h resolution. ### EPT-2 | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | | 00:00 | 05:50 | 06:00 | 06:15 | 06:25 | | 06:00 | 11:50 | 12:00 | 12:15 | 12:25 | | 12:00 | 17:50 | 18:00 | 18:15 | 18:25 | | 18:00 | 23:50 | 00:00 | 00:15 | 00:25 | ### EPT-2e | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | 1440 Hours (60d) | | --------------- | ----------- | -------- | --------------- | --------------- | ---------------- | | 00:00 | 05:55 | 06:15 | 06:50 | 06:55 | 07:45 | | 06:00 | 11:55 | 12:15 | 12:50 | 13:00 | N/A | | 12:00 | 17:55 | 18:15 | 18:50 | 18:55 | N/A | | 18:00 | 23:55 | 00:15 | 00:50 | 01:00 | N/A | ### EPT-2 Early | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | | 00:00 | 03:15 | 03:25 | 03:35 | 03:40 | | 06:00 | 09:15 | 09:25 | 09:35 | 09:40 | | 12:00 | 15:15 | 15:25 | 15:35 | 15:40 | | 18:00 | 21:15 | 21:25 | 21:35 | 21:40 | ### EPT-2 RR (Research Preview) | Base time (UTC) | Start (UTC) | 48 Hours | | --------------- | ----------- | -------- | | 00:00 | 01:50 | 02:00 | | 01:00 | 02:50 | 03:00 | | 02:00 | 03:50 | 04:00 | | 03:00 | 04:50 | 05:00 | | 04:00 | 05:50 | 06:00 | | 05:00 | 06:50 | 07:00 | | 06:00 | 07:50 | 08:00 | | 07:00 | 08:50 | 09:00 | | 08:00 | 09:50 | 10:00 | | 09:00 | 10:50 | 11:00 | | 10:00 | 11:50 | 12:00 | | 11:00 | 12:50 | 13:00 | | 12:00 | 13:50 | 14:00 | | 13:00 | 14:50 | 15:00 | | 14:00 | 15:50 | 16:00 | | 15:00 | 16:50 | 17:00 | | 16:00 | 17:50 | 18:00 | | 17:00 | 18:50 | 19:00 | | 18:00 | 19:50 | 20:00 | | 19:00 | 20:50 | 21:00 | | 20:00 | 21:50 | 22:00 | | 21:00 | 22:50 | 23:00 | | 22:00 | 23:50 | 00:00 | | 23:00 | 00:50 | 01:00 | ### EPT-2 HRRR (Research Preview) | Base time (UTC) | Start (UTC) | 48 Hours | | --------------- | ----------- | -------- | | 00:00 | 01:55 | 02:25 | | 01:00 | 02:55 | 03:25 | | 02:00 | 03:55 | 04:25 | | 03:00 | 04:55 | 05:25 | | 04:00 | 05:55 | 06:25 | | 05:00 | 06:55 | 07:25 | | 06:00 | 07:55 | 08:25 | | 07:00 | 08:55 | 09:25 | | 08:00 | 09:55 | 10:25 | | 09:00 | 10:55 | 11:25 | | 10:00 | 11:55 | 12:25 | | 11:00 | 12:55 | 13:25 | | 12:00 | 13:55 | 14:25 | | 13:00 | 14:55 | 15:25 | | 14:00 | 15:55 | 16:25 | | 15:00 | 16:55 | 17:25 | | 16:00 | 17:55 | 18:25 | | 17:00 | 18:55 | 19:25 | | 18:00 | 19:55 | 20:25 | | 19:00 | 20:55 | 21:25 | | 20:00 | 21:55 | 22:25 | | 21:00 | 22:55 | 23:25 | | 22:00 | 23:55 | 00:25 | | 23:00 | 00:55 | 01:25 | ### EPT-2 Reasoning | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | | 00:00 | 05:40 | 05:55 | 06:45 | 06:45 | | 06:00 | 11:40 | 11:55 | 12:45 | 12:45 | | 12:00 | 17:40 | 17:55 | 18:45 | 18:45 | | 18:00 | 23:40 | 23:55 | 00:45 | 00:45 | ### EPT-2.1 Helios Solar-only nowcast for Europe. 48h horizon, updated every 30 minutes. | Base time (UTC) | Start (UTC) | 48 Hours | | --------------- | ----------- | -------- | | 00:00 | 00:30 | 01:00 | | 00:30 | 01:00 | 01:30 | | 01:00 | 01:30 | 02:00 | | 01:30 | 02:00 | 02:30 | | 02:00 | 02:30 | 03:00 | | 02:30 | 03:00 | 03:30 | | 03:00 | 03:30 | 04:00 | | 03:30 | 04:00 | 04:30 | | 04:00 | 04:30 | 05:00 | | 04:30 | 05:00 | 05:30 | | 05:00 | 05:30 | 06:00 | | 05:30 | 06:00 | 06:30 | | 06:00 | 06:30 | 07:00 | | 06:30 | 07:00 | 07:30 | | 07:00 | 07:30 | 08:00 | | 07:30 | 08:00 | 08:30 | | 08:00 | 08:30 | 09:00 | | 08:30 | 09:00 | 09:30 | | 09:00 | 09:30 | 10:00 | | 09:30 | 10:00 | 10:30 | | 10:00 | 10:30 | 11:00 | | 10:30 | 11:00 | 11:30 | | 11:00 | 11:30 | 12:00 | | 11:30 | 12:00 | 12:30 | | 12:00 | 12:30 | 13:00 | | 12:30 | 13:00 | 13:30 | | 13:00 | 13:30 | 14:00 | | 13:30 | 14:00 | 14:30 | | 14:00 | 14:30 | 15:00 | | 14:30 | 15:00 | 15:30 | | 15:00 | 15:30 | 16:00 | | 15:30 | 16:00 | 16:30 | | 16:00 | 16:30 | 17:00 | | 16:30 | 17:00 | 17:30 | | 17:00 | 17:30 | 18:00 | | 17:30 | 18:00 | 18:30 | | 18:00 | 18:30 | 19:00 | | 18:30 | 19:00 | 19:30 | | 19:00 | 19:30 | 20:00 | | 19:30 | 20:00 | 20:30 | | 20:00 | 20:30 | 21:00 | | 20:30 | 21:00 | 21:30 | | 21:00 | 21:30 | 22:00 | | 21:30 | 22:00 | 22:30 | | 22:00 | 22:30 | 23:00 | | 22:30 | 23:00 | 23:30 | | 23:00 | 23:30 | 00:00 | | 23:30 | 00:00 | 00:30 | ### EPT-2.1 Europa High-resolution regional European ensemble (successor to EPT-2 HRRR). 48h horizon, hourly runs. | Base time (UTC) | Start (UTC) | 48 Hours | | --------------- | ----------- | -------- | | 00:00 | 01:55 | 02:25 | | 01:00 | 02:55 | 03:25 | | 02:00 | 03:55 | 04:25 | | 03:00 | 04:55 | 05:25 | | 04:00 | 05:55 | 06:25 | | 05:00 | 06:55 | 07:25 | | 06:00 | 07:55 | 08:25 | | 07:00 | 08:55 | 09:25 | | 08:00 | 09:55 | 10:25 | | 09:00 | 10:55 | 11:25 | | 10:00 | 11:55 | 12:25 | | 11:00 | 12:55 | 13:25 | | 12:00 | 13:55 | 14:25 | | 13:00 | 14:55 | 15:25 | | 14:00 | 15:55 | 16:25 | | 15:00 | 16:55 | 17:25 | | 16:00 | 17:55 | 18:25 | | 17:00 | 18:55 | 19:25 | | 18:00 | 19:55 | 20:25 | | 19:00 | 20:55 | 21:25 | | 20:00 | 21:55 | 22:25 | | 21:00 | 22:55 | 23:25 | | 22:00 | 23:55 | 00:25 | | 23:00 | 00:55 | 01:25 | ## AIFS Single 20 day forecast horizon with six-hourly temporal resolution. | Base time (UTC) | Start (UTC) | 480 Hours (20d) | | --------------- | ----------- | --------------- | | 00:00 | 05:40 | 05:50 | | 06:00 | 11:40 | 11:50 | | 12:00 | 17:40 | 17:50 | | 18:00 | 23:40 | 23:50 | ## Aurora 20 day forecast horizon with six-hourly temporal resolution. | Base time (UTC) | Start (UTC) | 480 Hours (20d) | | --------------- | ----------- | --------------- | | 00:00 | 05:50 | 06:00 | | 06:00 | 11:50 | 12:00 | | 12:00 | 17:50 | 18:00 | | 18:00 | 23:50 | 00:00 | ## NWP models The tables below show the time at which 90% of recent forecast steps were available via the standard API tier (early-access subscribers see them up to 30 minutes earlier). Values are derived from observed dissemination over the last 14 days (4 days for ECMWF ENS, which moved to a new pipeline on 2026-05-19), capped at the dissemination SLA configured in `jua-query-v2` and at 1 hour above the worst run observed in the last 3 days, and refreshed periodically. ### EC IFS ECMWF IFS HRES, deterministic. 360h horizon on 00/12 runs, 144h on 06/18. | Base time (UTC) | Start (UTC) | 90 Hours | 144 Hours (6d) | 240 Hours (10d) | 360 Hours (15d) | | --------------- | ----------- | -------- | -------------- | --------------- | --------------- | | 00:00 | 06:20 | 06:50 | 06:50 | 07:00 | 07:10 | | 06:00 | 12:10 | 12:40 | 12:40 | N/A | N/A | | 12:00 | 18:30 | 19:00 | 19:00 | 19:10 | 19:10 | | 18:00 | 00:20 | 00:20 | 00:20 | N/A | N/A | ### EC ENS ECMWF Ensemble (51 members). 360h horizon on 00/12 runs, 144h on 06/18. | Base time (UTC) | Start (UTC) | 90 Hours | 144 Hours (6d) | 240 Hours (10d) | 360 Hours (15d) | | --------------- | ----------- | -------- | -------------- | --------------- | --------------- | | 00:00 | 07:00 | 07:20 | 07:20 | 07:40 | 07:50 | | 06:00 | 13:00 | 13:10 | 13:20 | N/A | N/A | | 12:00 | 18:50 | 19:00 | 19:00 | 19:20 | 19:30 | | 18:00 | 02:10 | 02:10 | 02:20 | N/A | N/A | ### EC AIFS ECMWF AIFS Single, ML-based. 480h (20d) horizon at 6h cadence. | Base time (UTC) | Start (UTC) | 90 Hours | 240 Hours (10d) | 360 Hours (15d) | 480 Hours (20d) | | --------------- | ----------- | -------- | --------------- | --------------- | --------------- | | 00:00 | 06:10 | 06:10 | 06:10 | 06:10 | 06:10 | | 06:00 | 12:00 | 12:00 | 12:00 | 12:00 | 12:00 | | 12:00 | 18:10 | 18:10 | 18:10 | 18:10 | 18:10 | | 18:00 | 00:10 | 00:10 | 00:10 | 00:10 | 00:10 | ### EC46 ECMWF Extended Range (46 days). Single daily run at 00 UTC. | Base time (UTC) | Start (UTC) | 240 Hours (10d) | 480 Hours (20d) | 840 Hours (35d) | 1104 Hours (46d) | | --------------- | ----------- | --------------- | --------------- | --------------- | ---------------- | | 00:00 | 13:20 | 14:00 | 14:10 | 14:20 | 14:30 | ### ICON-D2 DWD ICON-D2 (regional, central Europe). 48h horizon, eight runs/day. | Base time (UTC) | Start (UTC) | 48 Hours | | --------------- | ----------- | -------- | | 00:00 | 03:10 | 03:20 | | 03:00 | 06:10 | 06:20 | | 06:00 | 09:10 | 09:20 | | 09:00 | 12:10 | 12:20 | | 12:00 | 15:10 | 15:20 | | 15:00 | 18:10 | 18:20 | | 18:00 | 21:10 | 21:20 | | 21:00 | 00:10 | 00:20 | ### ICON-EU DWD ICON-EU (regional, Europe). Main runs (00, 06, 12, 18) cover 120h; intermediate runs (03, 09, 15, 21) cover 48h. | Base time (UTC) | Start (UTC) | 48 Hours | 90 Hours | 120 Hours (5d) | | --------------- | ----------- | -------- | -------- | -------------- | | 00:00 | 04:30 | 04:30 | 04:30 | 04:30 | | 03:00 | 07:00 | 07:00 | N/A | N/A | | 06:00 | 10:30 | 10:30 | 10:30 | 10:30 | | 09:00 | 13:00 | 13:00 | N/A | N/A | | 12:00 | 16:30 | 16:30 | 16:30 | 16:30 | | 15:00 | 19:00 | 19:00 | N/A | N/A | | 18:00 | 22:30 | 22:30 | 22:30 | 22:30 | | 21:00 | 01:00 | 01:00 | N/A | N/A | ### ICON Global DWD ICON-Global. 180h horizon on 00/12 runs, 120h on 06/18. | Base time (UTC) | Start (UTC) | 90 Hours | 120 Hours (5d) | 144 Hours (6d) | 180 Hours (7.5d) | | --------------- | ----------- | -------- | -------------- | -------------- | ---------------- | | 00:00 | 04:50 | 04:50 | 04:50 | 04:50 | 04:50 | | 06:00 | 10:50 | 10:50 | 10:50 | N/A | N/A | | 12:00 | 16:50 | 16:50 | 16:50 | 16:50 | 16:50 | | 18:00 | 22:50 | 22:50 | 22:50 | N/A | N/A | ### GFS NOAA GFS deterministic. 384h (16d) horizon at 0.25° resolution. | Base time (UTC) | Start (UTC) | 48 Hours | 90 Hours | 144 Hours (6d) | 240 Hours (10d) | 384 Hours (16d) | | --------------- | ----------- | -------- | -------- | -------------- | --------------- | --------------- | | 00:00 | 04:20 | 04:30 | 04:50 | 05:00 | 05:20 | 06:00 | | 06:00 | 10:10 | 10:30 | 10:40 | 11:00 | 11:20 | 12:00 | | 12:00 | 16:10 | 16:30 | 16:40 | 16:50 | 17:20 | 18:00 | | 18:00 | 22:20 | 22:40 | 22:50 | 23:00 | 23:20 | 00:00 | --- # Agent Instructions This documentation is published with GitBook. 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