Alta Collins precipitation, MOS round 3

Issued Fri 2026-09-11 17:21 MDT · cln_precip_r3_20261024

= 2026-09-11 23:21 UTC −6 h−1 h+1 h+6 hnow

Model by hour: C2 × 17 · Overnight 16:00 to 09:00 MDT: measured 0.00 + expected 0.00 = 0.00 in

Hour to (MDT)ModelpIf wetCalled, p ≥ 0.5Called, p ≥ 0.4Called, p ≥ 0.3ExpectedLikely, p ≥ 0.5Phantom, p < 0.5GaugeHRRR wrfsubh leadHRRR wrfsubh cyclesGauge leadGFS leadGEFS lead
09-11 18:00C20.000.0220.0000.0000.0000.0000.0000.0000.002171612
09-11 19:00C20.000.0220.0000.0000.0000.0000.0000.0000.003162713
09-11 20:00C20.000.0220.0000.0000.0000.0000.0000.0000.004153814
09-11 21:00C20.000.0220.0000.0000.0000.0000.0000.0000.005144915
09-11 22:00C20.000.0220.0000.0000.0000.0000.0000.0000.0061351016
09-11 23:00C20.000.0220.0000.0000.0000.0000.0000.0000.0071261117
09-12 00:00C20.000.0220.0000.0000.0000.0000.0000.0000.0081171218
09-12 01:00C20.000.0220.0000.0000.0000.0000.0000.0000.0091081319
09-12 02:00C20.000.0220.0000.0000.0000.0000.0000.0000.0010991420
09-12 03:00C20.000.0220.0000.0000.0000.0000.0000.0000.00118101521
09-12 04:00C20.000.0220.0000.0000.0000.0000.0000.0000.00127111622
09-12 05:00C20.000.0220.0000.0000.0000.0000.0000.0000.00136121723
09-12 06:00C20.000.0220.0000.0000.0000.0000.0000.0000.00145131824
09-12 07:00C20.000.0220.0000.0000.0000.0000.0000.0000.00154141925
09-12 08:00C20.000.0220.0000.0000.0000.0000.0000.0000.00163152026
09-12 09:00C20.000.0220.0000.0000.0000.0000.0000.0000.00172162127
09-12 10:00C20.000.0220.0000.0000.0000.0000.0000.0000.00181172228
Total0.0000.0000.0000.0000.0000.0000.00

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 wrfsubh runs: up to 10 cycles in hand, up to the one picked, lighter the earlier, each the mean of its 4 points. Each MOS hour is split into 15 minutes as the HRRR wrfsubh cycle with the shortest lead time to it splits it, evenly without one. Each source lists its runs or readings in hand at the issue time that the model would still use, runs by their UTC start and readings by their local time; the forecast uses the source up to the one picked, and changing the issue time sets every source back to its default. In a replay, a source's default is its last run or reading at least this long before the issue time: the gauge 15 minutes, HRRR wrfsubh 50 minutes (the whole cycle), GFS 5 hours, GEFS 6 hours and AIFS single 5 hours. Built in 0.54 s.