WXLearn the Sky · in the works

Learn
the Sky.

Being planned: a meteorology school built into WX. From "what does 40% chance mean?" to professional-level forecasting, taught on the weather where you are, with the app's live maps as the classroom.

5 levels47 units & modulesLive data in every lessonA forecast contest with friends
How a lesson will work

Six steps, every time, and every one goes through the real app.

1Hook2Explain3Play4Find it5Check6Call it10–20 minon a phone, one ideaper screen
Example: precip type
1
HookWhy is it sleeting in one town and snowing 40 miles north? Today's precip-type map.
2
ExplainSnow falls through a warm layer, melts, and maybe refreezes. One diagram.
3
PlayDrag the warm layer on a sandbox Skew-T. Watch snow turn to sleet, then freezing rain.
4
Find itOpen tonight's sounding in Models. Explain mode outlines the warm nose.
5
CheckFour questions. One comes back tomorrow, one next week.
6
Call itWill your place see freezing rain Thursday? Locked, then scored against reports.

On a quiet weather day, the lesson runs on a saved storm instead, so it always works.

Five levels

Climb the atmosphere.

Five levels, each a layer higher. Start at the surface reading your own forecast. Finish at the jet stream, writing forecast discussions the way professional forecasters do, and trying to beat the models.

~165 h
to the top
2
tracks at Level 3: conceptual or mathematical

Every lesson will be open to anyone. A level will count as complete once most of it is answered correctly on two separate days.

Surface0Weather literacy~3 h850 mb1.5 km1How the atmosphere works~15 h500 mb5.5 km2Forecasting fundamentals~25 h300 mb9 km3The professional core~120 hJet stream10.5 km4Forecasteropen-endedYour place
The course

From reading your app to forecasting like a professional.

0
Weather literacy~3 hours · no math
What a forecast saysRadarWatches & warningsThe weather mapModelsRanges & chances
1
How the atmosphere works~15 hours · algebra only
The atmosphereEnergy & radiationTemperatureMoistureStabilityClouds & fogPrecipitationPressure & windThe jet streamAir masses & frontsCyclones & nor'eastersThunderstormsWinter stormsObservingWeather vs climate
2
Forecasting fundamentals~25 hours · no calculus
Surface analysisUpper-air chartsThe 500 mb mapWhy air risesJet streaksSkew-T analysisPrecip typeSnowfallHow models workEnsemblesRun-to-run trendsBlendsNowcastingThe forecast processVerification
3
The professional core~120 hours · concept or math track
Math & physics toolkitThermodynamicsDynamics IDynamics IIPhysical meteorologyMesoscale & severeRadar & satelliteNumerical predictionBoundary layerClimate & circulationTropical
4
Forecasteropen-ended · the capstone

A contest season, written forecast discussions and post-mortems on real storms.

Measured against the federal meteorologist standard
Dynamics & thermodynamics6 sem. hrs
Analysis & prediction6 sem. hrs
Physical meteorology3 sem. hrs
Remote sensing & instruments2 sem. hrs

Honest limits: it won't be a degree, and it won't qualify anyone for a federal meteorologist job, which needs accredited coursework. It will cover the same ground, on the weather outside.

Explain mode

Every chart can teach itself.

Turn on Explain and the Skew-T, the 500 mb map, the 250 mb jet chart and radar will label their own features, worked out from the data on screen, not canned text.

  • Skew-T · the cloud base, CAPE, the warm nose, the snow-growth zone
  • 500 mb · troughs, ridges, "air rises here"
  • 250 mb · jet streaks and their quadrants
  • Radar · the bright band, rotation, beam height
Sounding · your place · Thu 03z Illustration
1000850700500300-40°-30°-20°-10°0°10°20°30°
Snow-growth zone−12 to −18 °C, saturated
0 °C
Warm nose +3.6 °Csnow melts here
Shallow cold layertoo thin to refreeze
━ temperature━ dew point┅ 0 °C
The forecast contest

Commit to a call. Let the sky grade it.

How it will work
DailyTomorrow's high, low, peak wind and rain for a rotating city: yours, a friend's, or anywhere in the US.
StormsYour storm total and your chances. Overconfidence costs points.
ScoredA point per degree off, half per knot, against real station reports.
JournalA sentence on why. After the weather, it shows next to what happened.
Standings Illustration
Average error points a day · lower wins
1NWS7.2
2Your blend7.5
3A friend8.1
4You8.4
5ECMWF8.6
6GFS9.4
7Another friend9.9
You'll be up against friends, the models, the blend and the National Weather Service. Standings are opt-in.
Your error, 7-day average Illustration
57.51012.515GFSNWSYouNovDecJanBeating the NWS is the long game.
One day, scored Illustration
High41° → 43°+2.0
Low28° → 27°+1.0
Peak wind12 → 15 kt+1.5
Rain0.10″ → 0.14″+1.2
Today5.7
The time machine

Forecast a storm that already happened.

Open a past storm five days out. You'll only see the runs that existed then. Make a call, step forward a run, adjust. At the end: what actually fell, and how you did against every model.

Built from what WX already keeps: the storm archive, run-by-run playback and the measured totals from Past storms.

Snow total at your place, by model run Illustration
0″3″6″9″12″15″18″What fell: 7.3″Sat12zSun00zSun12zMon00zMon12zTue00zTue12zWed00zWed12zThu00z
● your calls · the band is the ensemble's range · ┅ what fell
Teachable moments

The weather picks the lesson.

Each new model run will be scanned at your places for one or two things worth learning, each linked to its lesson.

A warm nose over your place, Thursday nightSnow aloft melts in a +3 °C layer. Freezing rain likely.Precip type lesson →
A heavy band in the latest HRRRFrontogenesis lines up with the snow-growth zone.Snowfall lesson →
An SPC Slight Risk near one of your placesInstability with strong shear by afternoon.Thunderstorms lesson →
The models split on Sunday's stormEnsemble spread is double the usual. Two scenarios.Ensembles lesson →
Illustration
Sandboxes

Touch the physics.

Small tools where you change one thing and watch what happens.

Parcel lifter
Precip-type profile
Forces on the wind
Spin up a low
Radar beam
Thickness & snow
Snow ratio
Chaos
Energy balance

The best classroom
is the sky over
your house.

Learn the Sky is in the works. Until then, the maps and tools it will teach with are already in the app.

See the classroom: Models

Learn the Sky is being planned; nothing on this page is built yet. Its yardsticks: the AMS statement on the bachelor's degree in atmospheric science, the US federal meteorologist standard (GS-1340), Penn State's online weather forecasting certificate, Roland Stull's Practical Meteorology and the WxChallenge contest. Pictures are illustrations: every number is made up.