National Weather Service and AccuWeather guidance show a moist air mass advecting northward from the Gulf of Mexico, fueling widespread showers and thunderstorms across the Gulf Coast, Southeast, Mid-Atlantic, and Northeast on August 27. Elevated instability and precipitable water values above 2 inches support locally heavy rainfall and isolated flooding risk, especially where storms train along slow-moving boundaries. Model consensus from the GFS and NAM indicates afternoon and evening peaks in convective activity from northern Virginia through New York, with lower probabilities across the drier Midwest and Plains. Spotty showers may reach the northern Rockies and western Washington, while persistent high pressure keeps the Southwest and southern California rain-free. Updated NWS short-range forecasts and radar trends through evening will refine exact coverage for market 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 August 27?
New York, NY
74%
Los Angeles, CA
26%
Chicago, IL
27%
Houston, TX
53%
Dallas, TX
12%
Phoenix, AZ
6%
Philadelphia, PA
73%
Denver, CO
24%
Washington, DC
99%
Atlanta, GA
97%
Miami, FL
53%
Seattle, WA
52%
Boston, MA
51%
New Orleans, LA
99%
San Francisco, CA
28%
$845 Vol.
New York, NY
74%
Los Angeles, CA
26%
Chicago, IL
27%
Houston, TX
53%
Dallas, TX
12%
Phoenix, AZ
6%
Philadelphia, PA
73%
Denver, CO
24%
Washington, DC
99%
Atlanta, GA
97%
Miami, FL
53%
Seattle, WA
52%
Boston, MA
51%
New Orleans, LA
99%
San Francisco, CA
28%
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.
Resolution is based on the most recent CLI report published for the observation date. If multiple versions of the report are issued, the last version published before 11:59 PM ET on the day following the observation date 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: Aug 27, 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.
Resolution is based on the most recent CLI report published for the observation date. If multiple versions of the report are issued, the last version published before 11:59 PM ET on the day following the observation date 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 and AccuWeather guidance show a moist air mass advecting northward from the Gulf of Mexico, fueling widespread showers and thunderstorms across the Gulf Coast, Southeast, Mid-Atlantic, and Northeast on August 27. Elevated instability and precipitable water values above 2 inches support locally heavy rainfall and isolated flooding risk, especially where storms train along slow-moving boundaries. Model consensus from the GFS and NAM indicates afternoon and evening peaks in convective activity from northern Virginia through New York, with lower probabilities across the drier Midwest and Plains. Spotty showers may reach the northern Rockies and western Washington, while persistent high pressure keeps the Southwest and southern California rain-free. Updated NWS short-range forecasts and radar trends through evening will refine exact coverage for market resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions