National Weather Service outlooks highlight a moderate risk of excessive rainfall on September 17, 2026, across southern and central Arizona, the Sacramento Mountains of New Mexico, southern Utah, and southwestern Colorado, fueled by strong moisture advection, 850-500 mb winds, and terrain-enhanced lift. High-resolution ensemble guidance shows robust probabilities exceeding 60% for 2+ inches locally in these zones, with flash flood concerns elevated in slot canyons and the Mogollon Rim. Scattered showers and thunderstorms are also forecast across parts of the eastern U.S., Midwest, and Florida Peninsula due to lingering fronts and an approaching upper-level low, though amounts remain lighter. Traders should monitor updated Quantitative Precipitation Forecasts and HREF model runs for any shifts in steering or intensity before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedWhere will it rain on September 17?
New York, NY
26%
Los Angeles, CA
8%
Chicago, IL
50%
Houston, TX
26%
Dallas, TX
24%
Phoenix, AZ
26%
Philadelphia, PA
28%
Denver, CO
55%
Washington, DC
44%
Atlanta, GA
24%
Miami, FL
75%
Seattle, WA
24%
Boston, MA
50%
New Orleans, LA
24%
San Francisco, CA
13%
$498 Vol.
New York, NY
26%
Los Angeles, CA
8%
Chicago, IL
50%
Houston, TX
26%
Dallas, TX
24%
Phoenix, AZ
26%
Philadelphia, PA
28%
Denver, CO
55%
Washington, DC
44%
Atlanta, GA
24%
Miami, FL
75%
Seattle, WA
24%
Boston, MA
50%
New Orleans, LA
24%
San Francisco, CA
13%
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Market Opened: Sep 16, 2026, 7:09 AM ET
Resolver
0x65070BE91...Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Resolver
0x65070BE91...National Weather Service outlooks highlight a moderate risk of excessive rainfall on September 17, 2026, across southern and central Arizona, the Sacramento Mountains of New Mexico, southern Utah, and southwestern Colorado, fueled by strong moisture advection, 850-500 mb winds, and terrain-enhanced lift. High-resolution ensemble guidance shows robust probabilities exceeding 60% for 2+ inches locally in these zones, with flash flood concerns elevated in slot canyons and the Mogollon Rim. Scattered showers and thunderstorms are also forecast across parts of the eastern U.S., Midwest, and Florida Peninsula due to lingering fronts and an approaching upper-level low, though amounts remain lighter. Traders should monitor updated Quantitative Precipitation Forecasts and HREF model runs for any shifts in steering or intensity before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated


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