Frequently Asked Questions

RailTrailWx is a weather-based comfort scoring service built specifically for rail trails and the people who enjoy them, on a bike or on foot. Instead of raw forecast data, it translates weather conditions into an easy-to-read RailTrailWx Comfort Score: a single number from 0 to 100, tuned to your activity and preferences. This lets you quickly see which trails, which days, and which hours are best for your next outing.

Getting started is free and takes about a minute:

1. Visit the Dashboard. Pine Creek Rail Trail scores are open to everyone, no account needed.
2. Create a Free Pass account to add a second trail of your choice and build a personalized comfort profile.
3. Check hourly comfort scores and the multi-day outlook for your trails.
4. Upgrade to a RailTrailWx Pass to unlock every Pennsylvania rail trail and fully tunable comfort profiles.

The RailTrailWx Comfort Score is a number from 0 to 100 that reflects how comfortable weather conditions are expected to be for your activity on a given trail at a given time. A score near 100 means conditions closely match your comfort preferences; a score near 0 means conditions fall well outside them. Scores in between scale smoothly: the higher the number, the closer conditions are to your preferences. A middling score often means a single factor, like a gusty headwind, is weighing down an otherwise pleasant hour, and the hourly view will show you which one. Scores are shown by the hour so you can plan the best window for your outing.

Comfort scores are decision-support tools. They reflect your stated preferences, not objective safety. Always check official National Weather Service forecasts and alerts before heading out.

For each day in the forecast, RailTrailWx provides a Best Time recommendation. It highlights the daylight hour with the highest comfort score on your trail for your activity, so instead of scanning hourly numbers you can start from a simpler question: if I am going Saturday, when should I go?

Best Time follows your comfort profile, so two people on the same trail on the same day can get different answers; a cool-loving early riser and a warm-tolerant afternoon walker each see their own best window. It uses the trail's actual sunrise and sunset times, so it never suggests an hour in complete darkness, and if you have set a route, it accounts for which direction you are traveling.

If Best Time helps you decide when to go, the Map helps with where. It shows the supported trails across Pennsylvania, each marked with its comfort score for the hour you have selected, so you can compare conditions side by side. A gray, breezy morning on one trail can be a calm, sunny one a valley away. Step through the hours and days to watch conditions evolve across the state.

Tap a trail to switch to it. During active weather you can overlay live radar, statewide or from a single radar site with playback. Zoom in to see trail names and waypoints, use the locate button to find yourself, and expand the map to full screen. You can also right-click (or press and hold) any spot on the map to copy its coordinates or open it in Google Maps, handy for driving directions to a trailhead.

Yes, and we hope you will. Tap the share icon beside the score circle, and RailTrailWx creates a clean, ready-to-post picture of your score: the trail, the number, the time, and your activity. From your phone you can send it straight to a group chat or post it anywhere; on a computer it saves as an image.

It is the easiest way to make the case for Saturday morning to your riding group. And if it helps a few more people discover RailTrailWx along the way, we will not complain.

Scores start from a blend of operational weather models, aligned along each trail corridor. For every point along the trail, roughly each tenth of a mile, and every forecast hour, RailTrailWx compares four variables against your comfort thresholds: temperature, humidity, precipitation rate, and wind. Wind gets special treatment: gusts count, and so does the wind's angle to the trail, so a headwind penalizes the score more than a crosswind. The variables are combined so that the most uncomfortable factor dominates the score; a perfect temperature can't hide a soaking rain. At longer lead times, scores draw on ensemble forecasts to account for uncertainty.

The built-in profiles for seven activities, including biking, walking, running, and hiking, use sensible default thresholds, and every account can personalize them; see “What is a comfort profile?” below.

Beyond the first day or two, no single forecast run can be trusted on its own. An ensemble forecast addresses this by running the weather model many times, each starting from slightly different but equally plausible initial conditions. Where the runs agree, confidence is high. Where they spread apart, the atmosphere has more options on the table, and an honest forecast should say so.

RailTrailWx shows this to you directly. In the hourly view, scores beyond the short range display three numbers instead of one: the middle number is the typical outcome, and the smaller numbers on either side span the middle half of the ensemble. When the three numbers sit close together, the forecast is confident. When they are far apart, conditions could break either way, and it is worth checking back as your day approaches.

The Entrain Weather Microclimate Engine (EWME) is our proprietary system for teaching weather forecasts what conditions actually feel like on the trail, where standard models cannot see the shaded cut that stays cool until noon or the creek valley that turns muggy by late afternoon. It is built on thousands of research-grade temperature and humidity measurements we collect directly along these trails, in every season and condition.

EWME learns where the models go wrong and corrects the forecast point by point, using the terrain, the tree canopy, the time of day, and the current weather pattern. Before any correction goes live, it must prove on new trail measurements that it beats the original forecast. The result is a forecast calibrated to the trail itself, built by a meteorologist who rides these trails, and it gets sharper with every mile we log.

Weather forecast models run multiple times per day, and each new run may refine the forecast as the atmosphere evolves. Scores update automatically each hour as fresh model output becomes available. Changes are normal and expected, especially for times more than a day or two out. Check back closer to your planned outing for the most accurate picture.

RailTrailWx blends several operational weather models, each used where it performs best: the high-resolution, hourly-updating HRRR in the short range, and the ECMWF ensemble in the medium range, where its members also quantify forecast uncertainty. NOAA's GEFS, NBM, and NAM serve as backup guidance to help guarantee forecast reliability.

All model data is sourced from NOAA and ECMWF. See the Terms of Service for full attribution.

Comfort scores are shown for the next 5 days, with hourly detail in the short range. Shorter-range forecasts (within 24 to 48 hours) are the most reliable; multi-day outlooks are useful for planning but carry greater uncertainty. Scores update as each new model run arrives.

RailTrailWx uses the same operational weather models that professional meteorologists and the National Weather Service rely on. Within 24 hours, modern models are quite reliable, with one notable exception: scattered summer thunderstorms (see the next question). Accuracy decreases with forecast lead time; this is an inherent property of the atmosphere, not a limitation specific to RailTrailWx.

A note on long-range forecasts: any app showing you a single confident number for ten days from now is overselling what the atmosphere allows. RailTrailWx extends its outlook only as far as the science holds up, and where uncertainty grows, we show it to you rather than hide it. Scores are decision-support tools, not guarantees. Always consult official National Weather Service forecasts and use your own judgment.

Thunderstorms, common in Pennsylvania summers, are (in the opinion of this meteorologist) the hardest short-range forecast problem there is. No model can tell you hours ahead exactly which mile of trail a storm cell will cross, or exactly when. What models can predict well is whether the atmosphere favors storms forming at all.

RailTrailWx is built around that distinction. When storms are in the forecast, we smooth their rainfall across nearby hours and nearby points along the trail, so a storm that arrives an hour late or pops up a few miles away still lowers the comfort score for that window.

On the day of your outing itself, watch the dashboard: when radar shows rain near your trail or the National Weather Service issues an alert for it, Radar and Alerts buttons appear above the forecast and pulse (more urgently for heavy rain or warnings). If you see them, take a look before you head out. They jump straight to the live radar and the active alerts for that trail.

We also surface a thunderstorm coverage outlook from the National Weather Service. When storms are expected on your trail today, a Storms button appears and pulses, colored by how widespread the expected coverage is. Tapping it opens an hour-by-hour outlook, isolated, scattered, or numerous, for the rest of the day. Thunderstorms indirectly impact the Comfort Score through the rain, wind, temperature, and humidity changes they bring.

A comfort profile is your personal set of weather thresholds: the wind speeds, temperatures, humidity levels, and precipitation conditions that feel good, tolerable, or bad to you. RailTrailWx uses your profile to generate personalized comfort scores that reflect your actual preferences rather than a generic standard.

Every Free Pass account includes one personalized comfort profile, built by choosing preset threshold options for each variable (with up to 3 edits per 30 days). RailTrailWx Pass subscribers can save up to 10 profiles (for example, one for warm-weather outings and one for cool fall days) and can fine-tune the exact numeric threshold for every variable or disable individual variables entirely. Open the menu and go to My Profiles to create, edit, or switch between profiles.

The Free Pass includes Pine Creek Rail Trail (always free) plus one additional trail of your choice (swappable once every 10 days), one personalized comfort profile built from presets, route planning on your trails, the hourly and 5-day outlook, and live radar with National Weather Service alerts. It is a great way to explore the service at no cost.

A RailTrailWx Pass unlocks the full experience:

• Every Pennsylvania rail trail we cover
• Up to 10 personalized comfort profiles
• Fine-tune numeric thresholds for every variable
• Disable or hide individual scoring variables
• Route planning on all trails
• Priority email support

See the Pricing page for current plan details.

Yes. RailTrailWx Pass includes a 7-day free trial. No charge until the trial ends, and you can cancel any time before it does.

You can cancel any time through your account: open the menu, select Manage subscription, and follow the steps in the billing portal. You'll keep access through the end of your current billing period. You can also cancel by emailing support@railtrailwx.com.

RailTrailWx currently covers a growing selection of Pennsylvania rail trails. Browse them all on the Trails page, or open the Dashboard to see scores. Pine Creek Rail Trail is free for everyone; a Free Pass adds one more trail of your choice, and a RailTrailWx Pass unlocks them all.

RailTrailWx is young and growing quickly. On the roadmap: more trails, across Pennsylvania and beyond; built-in comfort profiles for more activities; more customization and additional variables; a longer forecast horizon in ensemble space; richer hourly detail; deeper, better-curated trail pages; plain-language forecast summaries and discussions written by our meteorologist; and email alerts when conditions on your trail look great or turn threatening. As the site grows, our early subscribers will be the first to benefit.

Early users have a real say in what comes first. If a feature would change how you plan your time outside, tell us at support@railtrailwx.com, and watch the Updates page to follow along. This is the stage where one good suggestion can shape the product.

Trail suggestions are welcome. Send your trail request (name, state, and a link to a trail map or official page if available) to support@railtrailwx.com.

For questions, billing issues, or bug reports, email support@railtrailwx.com. For general feedback and feature ideas, the Updates page is a good place to see what's on the roadmap.