Risk of hail - Wideumont weather radar

Hail products are derived from the observed vertical profiles of radar reflectivity and the NWP vertical profiles of temperature. Three types of products are generated. poh : probability of hail of any size (larger than 0.5 cm diameter)expressed in %. posh : probability of severe hail(larger than 2cm)expressed in %. mesh : maximum expected size of hailexpressed in mm of hailstone diameter. All products are generated every 5 minutes. This product is not publically available yet.

Date (Revision): 2024-10-01

Identifier: RMI-be / wideumont_hail

Status: On going

Point of contact

Royal Meteorological Institute of Belgium

Owner

Royal Meteorological Institute of Belgium

Maintenance and update frequency: Continual

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: Intellectual property rights

Classification: Unclassified

Spatial representation type: Grid

Distance: 500 http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources /uom/ML_gmxUom.xml#m

Metadata language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 2016-04-01T00:00:00

Unique resource identifier: EPSG:4258

Distribution format

HDF ( 5 )

OnLine resource: RMI opendata portal ( WWW:LINK-1.0-http--link )
RMI opendata portal

Hierarchy level: Dataset

Other: dataset

Domain consistency

Name of measure: INSPIRE Conformity

Conformance result

Date (Publication): 2010-12-08

Explanation: See the referenced specification

Pass: No

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.