Alta Collins precipitation, MOS round 3

Issued Sat 2026-10-10 16:21 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 10-10 16:00 MDT · HRRR 1010 21Z, f01–f15 · GFS 1010 12Z · GEFS 1010 12Z · AIFS single 1010 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
10-10 17:00C20.160.0800.0000.0000.0000.0130.0000.0130.0521711111
10-10 18:00C20.110.0510.0000.0000.0000.0060.0000.0060.0031621212
10-10 19:00C20.070.0420.0000.0000.0000.0030.0000.0030.0041531313
10-10 20:00C20.090.0380.0000.0000.0000.0030.0000.0030.0051441414
10-10 21:00C20.190.0360.0000.0000.0000.0070.0000.0070.0061351515
10-10 22:00C20.460.0560.0000.0560.0560.0260.0000.0260.0471261616
10-10 23:00C20.480.0630.0000.0630.0630.0300.0000.0300.1081171717
10-11 00:00C20.590.0540.0540.0540.0540.0320.0320.0000.1891081818
10-11 01:00C20.860.0800.0800.0800.0800.0680.0680.0000.1110991919
10-11 02:00C20.870.0790.0790.0790.0790.0680.0680.0000.15118102020
10-11 03:00C20.860.0920.0920.0920.0920.0800.0800.0000.17127112121
10-11 04:00C20.880.0790.0790.0790.0790.0700.0700.0000.14136122222
10-11 05:00C20.880.0830.0830.0830.0830.0730.0730.0000.11145132323
10-11 06:00C20.870.0930.0930.0930.0930.0810.0810.0000.11154142424
10-11 07:00C20.890.0730.0730.0730.0730.0650.0650.0000.25172152525
10-11 08:00C20.890.1110.1110.1110.1110.0990.0990.0000.14181162626
Total0.7450.8630.8630.7240.6370.0881.55

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 0.76 s.