Alta Collins precipitation, MOS round 3

Issued Sun 2026-10-11 23:21 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 23:00 MDT · HRRR 1012 04Z, f01–f15 · GFS 1011 18Z · GEFS 1011 18Z · AIFS single 1011 18Z

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 00:00C20.890.0530.0530.0530.0530.0470.0470.0000.0121711212
10-12 01:00C20.910.0800.0800.0800.0800.0720.0720.0000.0031621313
10-12 02:00C20.960.0970.0970.0970.0970.0930.0930.0000.0041531414
10-12 03:00C20.910.0680.0680.0680.0680.0620.0620.0000.0051441515
10-12 04:00C20.910.0880.0880.0880.0880.0800.0800.0000.0361351616
10-12 05:00C20.940.1530.1530.1530.1530.1440.1440.0000.1171261717
10-12 06:00C20.880.1010.1010.1010.1010.0890.0890.0000.2481171818
10-12 07:00C20.920.0950.0950.0950.0950.0880.0880.0000.0391081919
10-12 08:00C20.920.1250.1250.1250.1250.1160.1160.0000.0810992020
10-12 09:00C20.920.0760.0760.0760.0760.0700.0700.0000.07118102121
10-12 10:00C20.870.0490.0490.0490.0490.0430.0430.0000.05127112222
10-12 11:00C20.810.0500.0500.0500.0500.0400.0400.0000.00136122323
10-12 12:00C20.750.0410.0410.0410.0410.0310.0310.0000.10145132424
10-12 13:00C20.870.0470.0470.0470.0470.0410.0410.0000.07154142525
10-12 14:00C20.890.0840.0840.0840.0840.0740.0740.000–172152626
10-12 15:00C20.910.0880.0880.0880.0880.0800.0800.0000.07181162727
Total1.2951.2951.2951.1691.1690.0000.86

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 0.97 s.