Weathernews original airborne significant weather forecast data (TURB/ICE/CB)

GET

/wni/ascscale/{element}/{forecast_term}/grib2

Weathernews' unique Airway Safety and Comfort (ASC) scale data is composed of a high-resolution grid with intervals of 0.25 degrees (approx. 25 km) in lat and lon.
Weather elements are digitized in a grid format using GRIB (Gridded Binary) format.

Basic Information

Coverage: Worldwide (latitude 90.00 to -90.00, longitude 0.00 to 359.75)
Resolution: 0.25 degrees (1440 × 721 = 1,038,240 grids)
Altitude range: 5,000 to 45,000 ft (41 levels) *CB is cloud base/cloud top altitude (FL notation)
Data format: GRIB2
Time notation: All UTC

TURB(turbulence)

Short-term forecast(Nowcast)
Forecast interval: 1 hour
Forecast time: 3 hours (non-standard hours) or 6 hours
Update frequency: every 10 minutes
Scale: 0-5(0: None, 1: LIGHT, 2: Lig.toMod., 3: Moderate, 4: Mod.toSev., 5: SEVERE)

Long-term forecast
Forecast interval: 1 hour
Forecast time: 48 hours ahead
Update frequency: every 6 hours
The scale is the same as for short-term forecasts.

CONV(convection)

Short-term forecast (Nowcast)
Forecast interval: 1 hour
Forecast time: 6 hours
Update frequency: 1 hour
Scale: 0-2(0=None, 1=Scattered, 2=Broken)

Long-term forecast
Forecast interval: 1 hour
Forecast time: 48 hours ahead
Update frequency: every 6 hours
The scale is the same as for short-term forecasts.

ICE(icing)

Short-term forecast (Nowcast)
Forecast interval: 1 hour
Forecast time: 6 hours
Update frequency: 1 hourごと
Scale: 0-2(0=None, 1=Light, 2=Moderate)

Long-term forecast
Forecast interval: 1 hour
Forecast time: 48 hours ahead
Update frequency: every 6 hours
The scale is the same as for short-term forecasts.

CB(Cumulonimbus clouds: cloud base and cloud top altitude)

Information extracted based on CONV data
Unit: FL(flight level)
parm=250: Cloud top height(TOP)
parm=251: Cloud base height(BOTTOM)
nShort-term forecast: Forecast time6 hours, Update frequency: every 1 hour

Parameters

Path Parameters

element*

Specify the elements to be retrieved.
TURB: Turbulence Eddy dissipation rate
ICE: ICE severity index
CONV: Convection
CB: Cumulonimbus cloud

Typestring

Required

Enum

turbiceconvcb

Exampleturb

forecast_term*

Specify the type of prediction to obtain.
STF: Short Term Forecast
LTF: Long Term Forecast

Typestring

Required

Enum

stfltf

Examplestf

Responses

WNI ASC-Scale data

Content-Type

application/json

{

"list": [

{

"BaseTime": "202508010256",

"ForecastTime": "202508011456",

"URL": "https://example.com/contents/volcano/vaac/faa/geojson/VAAC_WASHINGTON_FAA_202508010256_VALID202508011456.json?Expires=1753855923&Signature=...&Key-Pair-Id=..."

}

]

}

GET

/wni/ascscale/{element}/{forecast_term}/grib2

Playground

Authorization

authorizationToken

Variables

Key

Value

element*

forecast_term*

Samples

cURL

JavaScript

PHP

Python