Engine room
Everything behind this site runs on one computer at the station: it reads the station and the ground sensor, downloads the forecast models and the National Weather Service's products, builds the forecast every hour, runs the physics, grades the results and sends each page's numbers here. This is that machinery, as it runs. Nothing here can be changed from the page.
30 parts running. Nothing needs a look.
Report from the station computer: 13 min ago (12:32 PM)
The engine
Coming in
On the station computer
9,411 station readings
33,976 ground readings
3,453 forecast products saved
79 MB in all
Each hour: the statistical forecast, the night and day physics, the hour-by-hour detail, the significant-weather ingredients, and the grading of every finished high and low.
Going out to this site
The last 24 hours
One row per part, one mark each time it ran. Hover over or tap a mark for the time.
The last hour, step by step
| Time | Step | Result | Took |
|---|---|---|---|
| 12:32:20 PM | Sent to the site: Readings | Received | 415 ms |
| 12:31:39 PM | Checked The Studio's research reports, relayed to the site | Nothing new | 55 ms |
| 12:30:19 PM | Checked Watches, warnings and advisories | Nothing new | 148 ms |
| 12:25:36 PM | Checked Your fog and frost log | Nothing new | 180 ms |
| 12:25:36 PM | Checked Your snow reports | Nothing new | 175 ms |
| 12:25:36 PM | Sent to the site: Airports | Received | 300 ms |
| 12:25:36 PM | Checked Airports around the station | Nothing new | 348 ms |
| 12:20:15 PM | Checked Watches, warnings and advisories | Nothing new | 209 ms |
| 12:17:32 PM | Sent to the site: This page | Received | 318 ms |
| 12:17:18 PM | Sent to the site: Readings | Received | 525 ms |
| 12:10:17 PM | Sent to the site: Airports | Received | 249 ms |
| 12:10:16 PM | Checked Airports around the station | New | 355 ms |
| 12:09:56 PM | Checked Watches, warnings and advisories | Nothing new | 170 ms |
| 12:08:13 PM | Checked Storm outlook, day 3 | Nothing new | 146 ms |
| 12:07:53 PM | Sent to the site: Run charts (images) | Received | 370 ms |
| 12:07:52 PM | Sent to the site: Past physics runs | Received | 493 ms |
| 12:07:50 PM | Built the forecast | Done | 161 s |
| 12:07:49 PM | Sent to the site: How it works | Received | 239 ms |
| 12:07:48 PM | Sent to the site: Today, hours, physics, significant weather | Received | 555 ms |
| 12:07:48 PM | Sent to the site: Forecast | Received | 323 ms |
| 12:02:29 PM | Sent to the site: This page | Received | 261 ms |
| 12:02:15 PM | Sent to the site: Readings | Received | 418 ms |
| 12:01:34 PM | Checked The Studio's research reports, relayed to the site | Nothing new | 51 ms |
| 12:00:14 PM | Sent to the site: push:ground_archive | Received | 455 ms |
| 11:59:52 AM | Checked Watches, warnings and advisories | Nothing new | 256 ms |
| 11:55:49 AM | Checked Storm outlook, day 2 | Nothing new | 33 ms |
| 11:55:49 AM | Checked Storm outlook, day 1 | New | 180 ms |
| 11:55:49 AM | Checked HRRR, rerun hourly | New | 151 ms |
| 11:55:48 AM | Checked Surface fronts and pressure centers | New | 4.3 s |
| 11:55:44 AM | Checked Global models (GFS, ECMWF, ICON, GEM, HRRR, NBM) | New | 561 ms |
| 11:55:44 AM | Checked WxSim runs | Nothing new | 418 ms |
| 11:55:43 AM | Checked National Weather Service gridpoint forecast | Nothing new | 372 ms |
| 11:55:43 AM | Checked National Weather Service text forecast | Nothing new | 194 ms |
| 11:55:23 AM | Checked Your fog and frost log | Nothing new | 164 ms |
| 11:55:22 AM | Checked Your snow reports | Nothing new | 178 ms |
| 11:55:02 AM | Sent to the site: Airports | Received | 322 ms |
| 11:55:02 AM | Checked Airports around the station | New | 401 ms |
| 11:49:41 AM | Checked Watches, warnings and advisories | Nothing new | 135 ms |
| 11:47:19 AM | Sent to the site: This page | Received | 282 ms |
| 11:47:04 AM | Sent to the site: Readings | Received | 518 ms |
| 11:39:43 AM | Checked Airports around the station | New | 357 ms |
| 11:39:43 AM | Sent to the site: Airports | Received | 222 ms |
| 11:39:22 AM | Checked Watches, warnings and advisories | Nothing new | 163 ms |
Station and ground readings, every 5 minutes, are left out here; they are on the timeline.
Coming up
| 12:35 PM | Next check: Weather station | due now |
| 12:40 PM | Next check: Watches, warnings and advisories | due now |
| 12:47 PM | Next check: Readings | in 2 min |
| 12:47 PM | Next check: This page | in 2 min |
| 12:55 PM | Next check: HRRR, rerun hourly | in 11 min |
| 12:55 PM | Next check: Global models (GFS, ECMWF, ICON, GEM, HRRR, NBM) | in 11 min |
| 12:55 PM | Next check: National Weather Service gridpoint forecast | in 11 min |
| 1:05 PM | The next forecast build | in 20 min |
| 1:59 PM | Next check: Upper air, clouds by layer and sunshine | in 75 min |
| 4:35 PM | Next check: Ensembles (122 runs) | in 4 hours |
| 5:29 PM | Sunset: tonight's physics run starts from the station's reading | in 5 hours |
| Fri, Jan 1, 4:00 AM | The next quarterly retrain of the statistical model | in 51 days |
As of the report at 12:32 PM.
By the numbers
L-039: 91 rows from 24 builds, newest 40 min ago
L-040: 91 rows from 24 builds, newest 40 min ago
L-041: 91 rows from 24 builds, newest 40 min ago
L-042: 91 rows from 24 builds, newest 40 min ago
L-043: 91 rows from 24 builds, newest 40 min ago
avg4: 659 rows from 24 builds, newest 40 min ago
main: 91 rows from 24 builds, newest 40 min ago
nws: 662 rows from 24 builds, newest 40 min ago
ours: 990 rows from 24 builds, newest 40 min ago
ours_floor: 57 rows from 24 builds, newest 40 min ago
ours_live: 57 rows from 24 builds, newest 40 min ago
wxsim: 438 rows from 24 builds, newest 40 min ago
main: 78 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
L-039: 78 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
L-040: 78 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
L-041: 78 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
L-042: 78 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
L-043: 76 graded, the latest 2026-11-10, 0 degraded, 0 with no row at the cut
How the engine works
One program, the collector, runs all the time. Every 20 seconds it checks what is due: the station every 5 minutes, the forecast products on their own clocks, and the forecast build once an hour. A forecast product is saved only when its content changed, so a check that finds nothing new costs nothing. A download that fails is tried again in 10 minutes.
The forecast build reads the newest of everything, runs the statistical model and the physics, writes the forecast, grades any high or low that has finished, and sends each page's numbers here. Pages that change faster (the ground, the readings, the airports and this page) are sent on their own shorter clocks.
Not shown: the nightly backups of the database, the Weather PC's logs and this website. They run as separate jobs on the same computer, and a daily check sends an alert to Brian's phone if any of them misses a night.