Alta Collins precipitation, MOS round 3

Issued Mon 2026-10-12 15:00 MDT (replay, models from the ClickHouse archive) · cln_precip_r3_20261024 · HRRR 4-point mean

−6 h−1 h+1 h+6 hnow
Storms at CLN since 10-19 12:00 MDT (at least 0.05 in; current sources and cut-offs kept)

In hand: Gauge through 10-12 13:00 MDT · HRRR 1012 20Z, f01–f05 · GFS 1012 12Z · GEFS 1012 12Z · AIFS single 1012 12Z

Model by hour: C2 × 16

Hour to (MDT)ModelpIf wetCalled, p ≥ 0.5Called, p ≥ 0.4Called, p ≥ 0.3ExpectedLikely, p ≥ 0.5Phantom, p < 0.5GaugeHRRR leadCyclesGauge leadGFS leadGEFS lead
10-12 16:00C20.750.0810.0810.0810.0810.0600.0600.0000.0021731010
10-12 17:00C20.800.0560.0560.0560.0560.0450.0450.0000.0031641111
10-12 18:00C20.820.0440.0440.0440.0440.0360.0360.0000.1541551212
10-12 19:00C20.960.1120.1120.1120.1120.1080.1080.0000.1551461313
10-12 20:00C20.960.1100.1100.1100.1100.1050.1050.0000.1671271414
10-12 21:00C20.920.0950.0950.0950.0950.0870.0870.0000.0781181515
10-12 22:00C20.910.0750.0750.0750.0750.0680.0680.0000.0891091616
10-12 23:00C20.920.0850.0850.0850.0850.0780.0780.0000.08109101717
10-13 00:00C20.900.0870.0870.0870.0870.0780.0780.0000.10118111818
10-13 01:00C20.860.0670.0670.0670.0670.0570.0570.0000.00127121919
10-13 02:00C20.870.0620.0620.0620.0620.0540.0540.0000.01136132020
10-13 03:00C20.830.0530.0530.0530.0530.0440.0440.0000.01145142121
10-13 04:00C20.590.0640.0640.0640.0640.0380.0380.0000.00154152222
10-13 05:00C20.630.0420.0420.0420.0420.0260.0260.0000.00163162323
10-13 06:00C20.660.0480.0480.0480.0480.0320.0320.0000.01172172424
10-13 07:00C20.500.0640.0000.0640.0640.0320.0000.0320.00181182525
Total1.0791.1431.1430.9490.9170.0320.82

Totals from the start of the issue hour, each 15-minute step included at its end; inches of water. Expected (p × the amount if wet) is the forecast total. Its areas split it into likely, from hours with p ≥ 0.5, and phantom, from hours with p < 0.5. Called is each hour as wet, max(amount if wet, 0.01) in, when p is at or above the cut-off, or dry, 0: what an hourly view shows. Its sum is not a total forecast: it counts each called hour as certain and the rest as 0, and in a storm of confident hours it runs above expected. The lower chart has each hour on its own: called at 0.5 against expected, and in replays the gauge. The gauge counts only the hours the forecast has. HRRR: the 10 newest runs in hand, oldest lightest; torchlight's weights are RTP 0.929558, albion 1.061006, castle 0.974476, superior 1.078902, summed and divided by 4. Each MOS hour is split into 15 minutes as the newest HRRR cycle in hand splits it, evenly without one. In a replay or with a source late, a datum counts only if it would have arrived by then: HRRR f(h) 52 + 2 (h − 1) minutes after the cycle, the gauge 10 minutes after the hour, GFS and GEFS 6 hours and AIFS single 7 hours after the run. Built in 0.99 s.