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.

Date (Révision): 2024-10-01

Identificateur: RMI-be / zaventem_hail

Etat: Mise à jour continue

Point de contact

Institut Royal Météorologique de Belgique

Propriétaire

Institut Royal Météorologique de Belgique

Fréquence de mise à jour: Continue

GEMET - INSPIRE themes, version 1.0

Conditions atmosphériques

Mots clés

federal government
hail
observation

Spatial scope

National

Contraintes d'accès: Autres restrictions

Autres contraintes: Pas de restrictions concernant l'accès public

Contraintes d'utilisation: Droit de propriété intellectuelle / Droit patrimonial

Restrictions de manipulation: Non classifié

Type de représentation spatiale: Raster

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

Langue: English

Catégorie ISO

Climatologie/Météorologie/Atmosphère

Date de début: 2016-04-01T00:00:00

Code: EPSG:4258

Format (encodage)

HDF ( 5 )

Ressource en ligne: Portail opendata de l'IRM ( WWW:LINK-1.0-http--link )
Portail opendata de l'IRM

Niveau: Jeu de données

Autre: dataset

Cohérence du domaine de valeurs

Nom du test: INSPIRE Conformity

Résultat de conformité

Date (Publication): 2010-12-08

Explication: See the referenced specification

Degré de conformité: Non

Généralités sur la provenance: 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.