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CloudTops reliability

Every claim the inference engine makes is checked against pilot reports. This page keeps the receipts: fixed benchmark routes, run daily.

40%

PIREP corroboration rate

evaluable segments

segments analyzed

days tracked

Does the inference hold up? outcome of every route segment vs. pilot reports

Data table

Day (UTC)	Segments	Corroborated	PIREP override	PIREP only	No PIREP tops	Rate
2026-07-30	12	1	1	1	9	50%
2026-07-31	4	1	2	0	1	33%

Latest benchmark reports KFCM-KORD, KALB-KPWM, KPVD-KAUG

KALB-KPWM Albany/Albany Intl → Portland/Portland Intl Jetport, 162 NM · 2026-07-31T18:00:07+00:00

low Segment 1 · 0–81 NM 1 IFR · 1 VFR · 3 unk

One VFR aircraft level at 5,334 ft MSL above the lowest ceiling (BKN/OVC) base (4,110-11,577 ft MSL across stations) — weak single-sample hint that tops are below 4,334 ft MSL. (Higher-layer tops reported by PIREP at 24,000, 25,000 ft MSL — separate layer, not the low deck.)

reported (PIREP) Segment 2 · 81–182 NM 2 IFR · 12 VFR · 3 unk

Potential deck top near 6,009 ft MSL — 1 aircraft tagged likely-VFR level above the lowest ceiling (BKN/OVC) base (4,223-9,684 ft MSL across stations), but the tag is weak: no VFR squawk, and cruising at an IFR hemispheric altitude in weather like this may simply be an IFR flight whose plan we can't see. Low probability; treat as a hint only. CONFLICT: PIREP reports tops at 7,000 ft MSL, above the traffic-derived bound of 6,009 ft — trust the PIREP; bound raised accordingly.

KPVD-KAUG Providence/Rhode Island Tf Green Intl → Augusta/Augusta State, 172 NM · 2026-07-31T18:00:22+00:00

reported (PIREP) Segment 1 · 0–86 NM 16 IFR · 12 VFR · 2 unk

One VFR aircraft level at 10,809 ft MSL above the lowest ceiling (BKN/OVC) base (4,223-13,004 ft MSL across stations) — weak single-sample hint that tops are below 9,809 ft MSL. CONFLICT: PIREP reports tops at 14,000 ft MSL, above the traffic-derived bound of 9,809 ft — trust the PIREP; bound raised accordingly.

medium Segment 2 · 86–192 NM 3 IFR · 6 VFR · 0 unk

One VFR aircraft level at 11,559 ft MSL above the lowest ceiling (BKN/OVC) base (4,185-6,049 ft MSL across stations) — weak single-sample hint that tops are below 10,559 ft MSL. CORROBORATED by PIREP: tops reported at 7,000 ft MSL, inside the traffic-derived bound.