Date (Revision)

2025-10-07

Citation identifier

RMI-be / belgian_composite_hail

Status

On going

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Royal Meteorological Institute of Belgium		info@meteo.be	Point of contact
Royal Meteorological Institute of Belgium		info@meteo.be	Owner

Maintenance and update frequency

Continual

User defined maintenance frequency

P0Y0M0DT0H5M0S

GEMET - INSPIRE themes, version 1.0

• Atmospheric conditions

Keywords

• federal government

• hail

• observation

Spatial scope

• National

Access constraints

Other restrictions

Other constraints

No limitations on public access

Use constraints

Other restrictions

Other constraints

Creative Commons Attribution 4.0 International (CC BY 4.0) This is a human-readable summary of (and not a substitute for) the license. You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Classification

Unclassified

Spatial representation type

Grid

Distance

500  m

Language

English

Topic category

• Climatology, meteorology, atmosphere

Begin date

2016-04-01T00:00:00

Unique resource identifier

EPSG:4258

Distribution format

Name	Version
HDF	5

Hierarchy level

Dataset

Other

dataset

Statement

Hail detection module is an implementation of two hail detection algorithms: of Witt and of Waldvogel (Waldvogelet al., 1979). The module takes radar observations and temperature information and estimates probability of hail (POH, %), probability of severe hail (POSH, %) and maximum expected size of hail (MESH, mm). The implementation of the Waldvogel algorithm is based on the Holleman's equation (I. Holleman, 2001), which was verified for Belgium by Delobbe et al. (2003). The POH is derived in the algorithm from the presence of a substantial updraft detected above the freezing level (0º-isoterm). The implementation of the Witt algorithm is based on the weighted integration of the reflectivity values between the heights of 0º-isoterm and -20º-isotherm (Witt et al., 1998). This algorithm provides POSH and MESH estimates.

Metadata

File identifier

RMI_DATASET_BELGIAN_COMPOSITE_HAIL XML

Metadata language

English

Hierarchy level

Dataset

Date stamp

2025-10-07

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Royal Meteorological Institute of Belgium		info@meteo.be	Point of contact

Other language

Language	Character encoding
French	UTF8
Dutch; Flemish	UTF8
German	UTF8