LA High Temp May 11: Market Splits on Seventy Degrees

A two-degree window is all that separates the leading outcome from a dozen alternatives in this Los Angeles temperature market. The 70-71°F bracket sits at 40% probability heading into May 11, but traders have been selling that position steadily. A 15% drop in implied probability over the last 24 hours is a real signal, not noise. The market is pricing uncertainty, not science.

This contract resolves on May 11, 2026 at noon local time. The question is simple: what is the highest recorded temperature in Los Angeles that day? Eleven outcomes compete, spanning a range from 53°F or below all the way to 72°F or higher. The 70-71°F bracket leads, but it leads a crowded field with no dominant conviction.

How the Los Angeles Temperature Contract Works

This market resolves YES for the 70-71°F bracket if official weather observations confirm the day’s peak temperature in Los Angeles falls between 70 and 71 degrees Fahrenheit on May 11, 2026. If the actual high lands in any other bracket, including 72°F or higher or 68-69°F, this contract pays NO. The resolution time is 2026-05-11 12:00:00, which means only the morning temperature peak, up to noon, is relevant.

• YES (70-71°F high temperature): priced at $0.40, implying 40% probability.
• NO (any other temperature bracket): priced at $0.60, implying 60% probability.

The NO side covers everything outside a two-degree band. That is a wide net. Los Angeles in mid-May can run warmer than 72°F on inland-influenced days or cooler than 68°F under deep marine layer conditions. Both directions threaten this bracket. The 60% NO price reflects how many ways this specific outcome can miss.

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Momentum and Market Signals

The momentum composite here is bearish and consistent. Zero movement in the last hour on top of a 15% drop over 24 hours, with a trend score of 51.36, points to a market where sellers have been active and buyers have not stepped in. The most likely driver is updated National Weather Service forecast data for Los Angeles on May 11, which has been shifting the expected high temperature range.

Total volume stands at $13,120, with $6,361 trading in the last 24 hours. Liquidity is $40,981. Volume is well below $1 million. That matters here: thin liquidity means a single large bet can move this price sharply before resolution. The 24-hour volume spike suggests traders are paying attention, but the market remains small enough to reprice fast on any fresh forecast data.

• The 1-hour price change of flat combined with a 24-hour drop of 15% confirms sellers are dominant but the pace has slowed, a sign traders may be waiting for the next NWS forecast update before pressing further.
• The trend score of 51.36 is nearly neutral on a longer horizon, meaning recent selling is a short-term shift, not a structural collapse in YES conviction.
• The 30-day price range (not cited as specific values) indicates this bracket has seen meaningful repricing as forecast models updated, which is normal behavior for near-term weather markets.
• Volume below $1 million means any single informed trader with a fresh weather model could move the price by several percentage points in either direction.

Lines Analysis: Los Angeles Temperature Forecasts and the Seventy-Degree Question

The National Weather Service Los Angeles forecast is the only data source that matters here. Mid-May in Los Angeles typically sits in a transitional window: marine layer influence from the Pacific pushes morning temperatures down, while afternoon clearing can allow temperatures to climb into the low-to-mid 70s depending on offshore flow. The 70-71°F bracket is a reasonable central estimate for a partly marine-influenced day, which is why it leads. Here is what the measurements are telling us: if the marine layer clears by late morning and the forecast high tracks near 71°F, this bracket resolves YES before noon.

The NO case is straightforward. A stronger-than-expected marine layer keeps the high at 68°F or 69°F, pushing the outcome into an adjacent bracket. Alternatively, a warm offshore Santa Ana-adjacent pattern pushes the high to 72°F or above, which is the next populated bracket on the upper end. Both adjacent brackets would pay NO on this contract. The two-degree resolution window is narrow for a city where temperature forecasts carry plus-or-minus three degrees of uncertainty at 48-hour lead times.

• National Weather Service Los Angeles: the next forecast update, specifically the afternoon high temperature for May 11, is the single most important input for this market before resolution.
• Marine layer depth and overnight low temperature on May 10 into May 11 will determine morning clearing time and constrain the afternoon peak.
• Any Santa Ana wind advisory or offshore flow signal issued by NWS would shift probability toward the 72°F or higher bracket.
• A deep marine layer persisting past 10 AM on May 11 would shift probability toward the 68-69°F bracket.
• Automated surface observation data from downtown Los Angeles and LAX will be the resolution inputs, not forecast models.

At $13,120 in total volume, this market is small. The 40% YES price is a reasonable reflection of forecast uncertainty, not a strong directional conviction. The data favors neither side decisively. The 15% drop in YES probability over 24 hours suggests the latest NWS forecast moved the expected high slightly outside the 70-71°F window, but the market has not fully committed to an adjacent bracket either.

LINES VERDICT

Contested Near-Term Weather Call

The 70-71°F bracket leads on probability but has lost ground steadily as forecast models updated. This is a weather market resolving in under 24 hours, and the science here is forecast precision, not climate trend.

What the market says: Forty percent probability means traders see the 70-71°F outcome as the most likely single bracket but give a 60% collective weight to everything else. With resolution at 2026-05-11 12:00:00, thin volume means any NWS update tonight or early morning could reprice this contract sharply.

Key unknown: The National Weather Service afternoon forecast update for May 11 Los Angeles, specifically whether the marine layer clears before noon and allows the high to reach 70-71°F, is the single data point that resolves this market.

Scientific Context: Mid-May Temperature Patterns in Los Angeles

Los Angeles in mid-May sits in a transitional seasonal window. The North Pacific High is strengthening but has not yet locked in summer patterns. Marine layer influence is common, with coastal eddy patterns keeping afternoon highs in the high 60s to low 70s on most days. Inland areas like downtown Los Angeles and the San Fernando Valley warm faster than coastal stations. The specific observation location used for resolution matters. LAX, which sits at the coast, reads lower than downtown or Van Nuys. If resolution uses a downtown or inland station, warmer brackets gain probability. The 70-71°F bracket sits squarely in the climatological center for a moderate marine influence day at a non-coastal Los Angeles station in mid-May.

Frequently Asked Questions

• What does 40% probability mean here? It means traders collectively estimate a 40% chance the Los Angeles high temperature on May 11 lands between exactly 70 and 71 degrees Fahrenheit, and a 60% chance it lands anywhere else across ten other possible brackets.
• What pays out on NO? Any resolution outside the 70-71°F bracket pays NO. That includes both warmer outcomes, such as 72°F or higher, and cooler outcomes, such as 68-69°F or below.
• What data release would move this price the most? A National Weather Service Los Angeles forecast update shifting the May 11 expected high temperature above 72°F or below 69°F would reprice this contract significantly before resolution.
• When does this market resolve? Resolution is set for 2026-05-11 12:00:00, which means only temperature observations up to noon on May 11 in Los Angeles are relevant for determining the outcome.
• Is this market reliable given the volume? Total volume of $13,120 and liquidity of $40,981 are thin. Prices here can move sharply on a single large trade or a fresh forecast update, so treat this probability as indicative, not settled.

This analysis reflects market conditions as of 2026-05-10 14:12:21. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-11 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.