Where will it rain on Oct 21, 2026?
Same-day forecasts strongly point to measurable precipitation at Phoenix on October 21. The market’s 81% looks directionally right, and the latest reporting justifies a modest upward adjustment.
Analysis
Forecasts strongly support measurable rain in Phoenix, with showers and thunderstorms expected during the day and night. The WPC Slight Risk and flood watch both indicate a credible rain event, not just isolated sprinkles.
The main downside is spatial variability: storm coverage may be scattered, and the airport could miss the heaviest cells. Even so, the recent reporting makes a dry CLIPHX outcome less likely than the current market price suggests.
Arguments
For
- WPC Slight Risk supports widespread measurable precipitation.
- Forecasts explicitly call for Phoenix showers and thunderstorms.
Against
- Rain coverage is expected to be intermittent and uneven.
- A thunderstorm track can miss the airport despite nearby rain.
Key drivers
- Strong forecast signal for showers and thunderstorms
- Airport-specific miss remains the main failure mode
Risk factors
- Scattered storms may bypass CLIPHX entirely
- Rainfall timing could occur outside the airport location
Scenarios
Best case
Multiple storm bands hit Phoenix and produce clear measurable rainfall at the airport.
Most likely
Phoenix gets at least one measurable rain event, though totals vary widely.
Worst case
Storms stay nearby but CLIPHX records no precipitation all day.
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