Alta Collins precipitation, MOS round 3

Issued Sun 2026-10-11 13:00 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 10-11 11:00 MDT · HRRR 1011 18Z, f01–f05 · GFS 1011 12Z · GEFS 1011 12Z · AIFS single 1011 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
10-11 14:00C20.270.0380.0000.0000.0000.0100.0000.010–217388
10-11 15:00C20.320.0310.0000.0000.0310.0100.0000.010–316499
10-11 16:00C20.750.0540.0540.0540.0540.0410.0410.000–41551010
10-11 17:00C20.830.1000.1000.1000.1000.0840.0840.000–51461111
10-11 18:00C20.890.1500.1500.1500.1500.1330.1330.000–71271212
10-11 19:00C20.950.2220.2220.2220.2220.2100.2100.000–81181313
10-11 20:00C20.950.1800.1800.1800.1800.1710.1710.000–91091414
10-11 21:00C20.940.1040.1040.1040.1040.0970.0970.000–109101515
10-11 22:00C20.910.0570.0570.0570.0570.0520.0520.0000.06118111616
10-11 23:00C20.880.0630.0630.0630.0630.0560.0560.0000.04127121717
10-12 00:00C20.900.0830.0830.0830.0830.0740.0740.0000.01136131818
10-12 01:00C20.870.0650.0650.0650.0650.0570.0570.0000.00145141919
10-12 02:00C20.920.0790.0790.0790.0790.0720.0720.0000.00154152020
10-12 03:00C20.910.0550.0550.0550.0550.0500.0500.0000.00163162121
10-12 04:00C20.890.0860.0860.0860.0860.0760.0760.0000.03172172222
10-12 05:00C20.880.0880.0880.0880.0880.0770.0770.0000.11181182323
Total1.3841.3841.4151.2681.2480.0200.25

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 0.87 s.