BY · per-country backtest
Belarus forecast vs reality
Every Voidly Sentinel shutdown-risk forecast for Belarus, plotted against what actually happened. 117 (predicted, observed) pairs from the rolling 30-day evaluation window.
Updated every 30 min · CC BY 4.0 · Raw JSON · Current forecast →
Forecasts evaluated
117
since Apr 17
Accuracy @ 0.5
43.6%
51/117 correct
Brier score
0.298
lower is better
Observed positive rate
18%
mean predicted 31%
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)
All 117 predictions (newest first)
| Eval date | Forecast | Pred ≥ 0.5? | Observed? | Correct? |
|---|---|---|---|---|
| Aug 12 | 75.5% | ↑ | no event | ✗ |
| Aug 11 | 82.3% | ↑ | no event | ✗ |
| Aug 10 | 77.9% | ↑ | no event | ✗ |
| Aug 9 | 71.4% | ↑ | no event | ✗ |
| Aug 8 | 74.4% | ↑ | no event | ✗ |
| Aug 7 | 82.6% | ↑ | no event | ✗ |
| Aug 6 | 59.2% | — | no event | ✓ |
| Aug 5 | 71.8% | ↑ | no event | ✗ |
| Aug 4 | 77.2% | ↑ | no event | ✗ |
| Aug 3 | 73.5% | ↑ | no event | ✗ |
| Aug 2 | 68.7% | ↑ | no event | ✗ |
| Aug 1 | 66.9% | ↑ | no event | ✗ |
| Jul 31 | 70.3% | ↑ | no event | ✗ |
| Jul 29 | 44.6% | — | no event | ✓ |
| Jul 28 | 49.3% | ↑ | no event | ✗ |
| Jul 27 | 56.5% | ↑ | no event | ✗ |
| Jul 26 | 67.7% | ↑ | no event | ✗ |
| Jul 25 | 65.2% | ↑ | no event | ✗ |
| Jul 24 | 64.7% | ↑ | no event | ✗ |
| Jul 23 | 62.0% | ↑ | no event | ✗ |
| Jul 22 | 67.0% | ↑ | no event | ✗ |
| Jul 21 | 63.3% | ↑ | no event | ✗ |
| Jul 20 | 59.7% | ↑ | no event | ✗ |
| Jul 19 | 62.8% | ↑ | no event | ✗ |
| Jul 18 | 60.6% | ↑ | no event | ✗ |
| Jul 17 | 58.0% | ↑ | no event | ✗ |
| Jul 16 | 65.7% | ↑ | no event | ✗ |
| Jul 15 | 69.4% | ↑ | no event | ✗ |
| Jul 14 | 58.7% | ↑ | no event | ✗ |
| Jul 13 | 56.8% | ↑ | no event | ✗ |
| Jul 12 | 54.6% | ↑ | no event | ✗ |
| Jul 11 | 44.3% | ↑ | no event | ✗ |
| Jul 10 | 45.7% | ↑ | no event | ✗ |
| Jul 9 | 55.1% | ↑ | no event | ✗ |
| Jul 8 | 56.2% | ↑ | no event | ✗ |
| Jul 7 | 58.8% | ↑ | no event | ✗ |
| Jul 6 | 57.5% | ↑ | no event | ✗ |
| Jul 5 | 57.5% | ↑ | no event | ✗ |
| Jul 4 | 66.5% | ↑ | no event | ✗ |
| Jul 3 | 68.5% | ↑ | no event | ✗ |
| Jul 2 | 58.8% | ↑ | no event | ✗ |
| Jul 1 | 61.4% | ↑ | no event | ✗ |
| Jun 30 | 64.9% | ↑ | shutdown | ✓ |
| Jun 29 | 62.6% | ↑ | shutdown | ✓ |
| Jun 28 | 62.1% | ↑ | shutdown | ✓ |
| Jun 27 | 66.5% | ↑ | shutdown | ✓ |
| Jun 26 | 66.6% | ↑ | shutdown | ✓ |
| Jun 25 | 63.3% | ↑ | no event | ✗ |
| Jun 24 | 69.6% | ↑ | no event | ✗ |
| Jun 23 | 69.9% | ↑ | no event | ✗ |
| Jun 22 | 68.7% | ↑ | no event | ✗ |
| Jun 21 | 2.7% | — | no event | ✓ |
| Jun 20 | 5.0% | ↑ | no event | ✗ |
| Jun 19 | 3.3% | — | no event | ✓ |
| Jun 18 | 4.0% | — | no event | ✓ |
| Jun 17 | 3.0% | — | no event | ✓ |
| Jun 16 | 4.0% | — | no event | ✓ |
| Jun 15 | 5.5% | — | no event | ✓ |
| Jun 14 | 5.0% | — | no event | ✓ |
| Jun 13 | 4.9% | — | 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/by — current 7-day calibrated forecast for Belarus with SHAP drivers
- /by — Belarus country page (current state, recent incidents)
- /sentinel/backtest — global reliability diagram + per-country comparison table
- Calibration refit writeup