Risk of hail - Zaventem 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.

Datum (revisie): 2024-10-01

Identifier: RMI-be / zaventem_hail

Status: continu geactualiseerd

contactpunt

Koninklijk Meteorologisch Instituut van België

eigenaar

Koninklijk Meteorologisch Instituut van België

Herzieningsfrequentie: continu

GEMET - INSPIRE themes, version 1.0

Atmosferische omstandigheden

Trefwoorden

federal government
hail
observation

Spatial scope

Nationaal

(Juridische) toegangsrestrictie: anders

Overige beperkingen: Geen beperkingen op openbare toegang

(Juridische) gebruiksbeperking: intellectueel eigendom

Veiligheidsrestricties: vrij toegankelijk

Ruimtelijk schema: grid

Afstand: 666 http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources /uom/ML_gmxUom.xml#m

Taal: English

Onderwerp

klimatologie, meteorologie atmosfeer

Begindatum: 2016-04-01T00:00:00

Code: EPSG:4258

Distributie formaat

HDF ( 5 )

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

Niveau kwaliteitsbeschrijving: dataset

Anders: dataset

Domain consistentie

Name of measure: INSPIRE Conformity

Resultaat conformiteit met de specificatie

Datum (publicatie): 2010-12-08

Uitleg: See the referenced specification

Indicatie van conformiteit met de specificatie: Nee

Algemene beschrijving herkomst: 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.