The Polymarket question “Will NYC have between 5 and 6 inches of precipitation in July?” saw a dramatic shift in sentiment over the past 24 hours, with the YES contract price plunging 44.5 percentage points from 59.0% to 14.5% as of July 17, 2026. This significant drop in implied probability occurred alongside $10K in total 24-hour trading volume on the market, which has seen $11K in lifetime volume from 57 unique traders.
Interestingly, whale activity diverged from the price action during this period. Despite the sharp decline in YES price, whales collectively bought $9K and sold $5K of YES contracts, resulting in a net $3K inflow into YES positions across 22 unique whale traders. This divergence suggests that while the broader market rapidly decreased its confidence in the precipitation outcome, large traders maintained or increased exposure to the YES side.
The split between price and whale flow highlights a complex dynamic where the market tape is pricing a much lower chance of 5 to 6 inches of rain in NYC this July, but sizable participants are not fully aligning with the selloff. The combined price and flow picture signals a market undergoing rapid repricing with nuanced participant behavior, underscoring the volatility and uncertainty around this weather event outcome.
| Market | Will NYC have between 5 and 6 inches of precipitation in July? |
|---|---|
| Market ID | 2865848 |
| 24h price change | +44.5 pp |
| YES now (PM Breaking) | 14.5% |
| YES ~24h ago (est.) | 59.0% |
| YES (Polydata overview) | 14.5% |
| Whale net flow (24h) | $3K |
| Whale buy / sell (24h) | $9K / $5K |
| Unique whales (24h) | 22 |
| Volume 24h (PM) | $10K |
| Unique traders (Polydata) | 57 |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-17. Data: Polydata API v3. On-chain figures are public. Realized PnL is computed over resolved markets only and excludes open positions, so it is conservative versus the Polymarket UI. This is not investment advice.