VN · per-country backtest
Vietnam forecast vs reality
Compare published forecasts with observed outcomes for this country.
Updated every 30 min · CC BY 4.0 · Raw JSON · Current forecast →
Forecast time series
Blue line: forecast probability. Green ✓ markers: forecast was right. Red ✗ markers: forecast was wrong. Dashed line at 0.5 is the binary decision threshold.
Y axis: forecast probability · Faint tick: distance to observed outcome (0 or 1)
Forecasts evaluated
164
since Apr 17
Accuracy @ 0.5
59.1%
97/164 correct
Brier score
0.245
lower is better
Observed positive rate
26%
mean predicted 7%
All 164 predictions (newest first)
| Eval date | Forecast | Pred ≥ 0.5? | Observed? | Correct? |
|---|---|---|---|---|
| Sep 27 | 12.4% | ↑ | no event | ✗ |
| Sep 26 | 7.5% | ↑ | no event | ✗ |
| Sep 25 | 8.9% | ↑ | no event | ✗ |
| Sep 24 | 8.5% | ↑ | no event | ✗ |
| Sep 23 | 7.9% | ↑ | no event | ✗ |
| Sep 22 | 10.3% | ↑ | no event | ✗ |
| Sep 21 | 4.7% | — | no event | ✓ |
| Sep 20 | 4.5% | — | no event | ✓ |
| Sep 19 | 9.6% | ↑ | no event | ✗ |
| Sep 18 | 3.4% | — | no event | ✓ |
| Sep 17 | 8.8% | ↑ | no event | ✗ |
| Sep 16 | 8.8% | ↑ | no event | ✗ |
| Sep 15 | 4.7% | — | no event | ✓ |
| Sep 14 | 9.2% | ↑ | no event | ✗ |
| Sep 13 | 3.3% | — | no event | ✓ |
| Sep 12 | 7.7% | ↑ | no event | ✗ |
| Sep 11 | 8.3% | ↑ | no event | ✗ |
| Sep 10 | 9.0% | ↑ | no event | ✗ |
| Sep 9 | 7.3% | — | no event | ✓ |
| Sep 8 | 8.3% | ↑ | no event | ✗ |
| Sep 7 | 5.0% | — | no event | ✓ |
| Sep 6 | 3.7% | — | no event | ✓ |
| Sep 5 | 4.7% | — | no event | ✓ |
| Sep 4 | 4.6% | — | no event | ✓ |
| Sep 3 | 3.4% | — | no event | ✓ |
| Sep 2 | 3.5% | — | no event | ✓ |
| Sep 1 | 3.1% | — | shutdown | ✗ |
| Aug 31 | 2.5% | — | shutdown | ✗ |
| Aug 30 | 3.4% | — | shutdown | ✗ |
| Aug 29 | 3.3% | — | shutdown | ✗ |
| Aug 28 | 3.0% | — | shutdown | ✗ |
| Aug 27 | 5.1% | — | no event | ✓ |
| Aug 26 | 7.5% | ↑ | no event | ✗ |
| Aug 25 | 6.9% | — | no event | ✓ |
| Aug 24 | 6.3% | — | no event | ✓ |
| Aug 23 | 1.9% | — | no event | ✓ |
| Aug 22 | 2.1% | — | shutdown | ✗ |
| Aug 21 | 2.1% | — | shutdown | ✗ |
| Aug 20 | 2.6% | — | shutdown | ✗ |
| Aug 19 | 4.6% | — | shutdown | ✗ |
| Aug 18 | 7.0% | — | shutdown | ✗ |
| Aug 17 | 7.0% | — | no event | ✓ |
| Aug 16 | 3.9% | — | no event | ✓ |
| Aug 15 | 3.8% | — | no event | ✓ |
| Aug 14 | 3.9% | — | no event | ✓ |
| Aug 13 | 1.8% | — | no event | ✓ |
| Aug 12 | 3.2% | — | no event | ✓ |
| Aug 11 | 5.6% | — | no event | ✓ |
| Aug 10 | 3.7% | — | no event | ✓ |
| Aug 9 | 8.9% | ↑ | no event | ✗ |
| Aug 8 | 7.8% | ↑ | no event | ✗ |
| Aug 7 | 4.5% | — | no event | ✓ |
| Aug 6 | 7.3% | — | no event | ✓ |
| Aug 5 | 9.1% | ↑ | no event | ✗ |
| Aug 4 | 8.0% | ↑ | no event | ✗ |
| Aug 3 | 4.8% | — | no event | ✓ |
| Aug 2 | 5.9% | — | no event | ✓ |
| Aug 1 | 6.0% | — | no event | ✓ |
| Jul 31 | 4.0% | — | no event | ✓ |
| Jul 30 | 6.6% | — | no event | ✓ |
How to read this
- Each row is one historical forecast. We made the prediction at eval_date, then waited the 7-day horizon, then graded against the observed outcome.
- Forecast % is the calibrated probability we published that day. Post-recalibration (2026-05-20) these now match actual observed rates much better — see the refit finding.
- Pred ≥ 0.5 shows the binary alert decision. Note we usually fire alerts at a lower threshold (see /v1/sentinel/global_heatmap for the live cutoff) — the 0.5 column here is for backtest scoring consistency with the global confusion matrix.
- Correct = both (pred ≥ 0.5) and (observed) agree.
Related
- /atlas/forecast/vn — current 7-day calibrated forecast for Vietnam with SHAP drivers
- /vn — Vietnam country page (current state, recent incidents)
- /sentinel/backtest — global reliability diagram + per-country comparison table
- Calibration refit writeup
About this view
Every Voidly Sentinel shutdown-risk forecast for Vietnam, plotted against what actually happened. 164 (predicted, observed) pairs from the rolling 30-day evaluation window.