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High-resolution Cloud Analysis Information (HCAI)

High-resolution Cloud Analysis Information (HCAI) provides data on five elements: cloud mask (including dust mask), snow and ice mask, height of cloud top, type of cloud, and quality check information (the effects of stray light, quality of cloud mask and other variables). These data are derived from Himawari-8/9 satellite imagery and cover the area from 60&degN to 60&degS and from 80&degE to 160&degW with a mesh of 0.02-degree squares. HCAI is used as objective resource for local and aviation forecast operations.

Reference

Meteorological Satellite Center Technical Note No.61 High-resolution Cloud Analysis Information derived from Himawari-8 data

Sample

Sample below are HCAI at 02 UTC on 1 April 2015.


Cloud Mask

Snow and Ice Mask

Height of Cloud Top

Type of Cloud



Reference: Himawari-8 imagery captured with the same timing as the above (02 UTC on April 1, 2015)


Band 13 imagery

Band 3 imagery


Real-time data distribution

HCAI is distributed via the JMA Data Dissemination System (JDDS) exclusively for National Meteorological and Hydrological Services (NMHSs).
Real-time monitoring can be accessed at
https://www.jma.go.jp/jma/jma-eng/jma-center/nowcasting/









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