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The London VAAC has specialist forecasters who produce volcanic ash advisories and guidance products using a combination of data from observations and models.
Introduction The Met Office NAME dispersion model is initialised with both meteorological and volcanic eruption data. This includes winds, temperature, humidity, height of plume, size of ash particles and more. NAME is the standard dispersion model used by London VAAC, but data from other
High pressure will influence the UK’s weather this weekend, but what does that mean for the thousands of people running the TCS London Marathon?
After a wet start to April, where some counties have already had more than their average rainfall for the whole of the month, the weekend weather forecast is for drier, more settled weather to become dominant for much of the UK. Speaking in the Met Office’s London Marathon forecast on YouTube, Met
The VAAC London QVA API, introduced in July 2025, provides access to the Quantitative Volcanic Ash (QVA) data sets provided by the London Volcanic Ash advisory centre (VAAC).
In accordance with ICAO Annex 3, Amendment 82 VAAC London will provide operational QVA forecasts from 27 November 2025 and these will be made available via a VAAC London QVA API information service. VAAC London has been offering a beta QVA API for test and evaluation purposes (not for operational
These plots show the performance of WAFC London forecasts produced by the Met Office in the United Kingdom.
Verification statistics for World Area Forecast Centre (WAFC) London data sets are produced by the Met Office for various regions, mostly corresponding to World Meteorological Organization (WMO) CBS-defined areas for comparison between modelling centres. Area 2 covers the north Atlantic, western
VAAC LONDON QVA API LICENCE AGREEMENT (Standard VAAC London QVA API Licence for use with VAAC London QVA Terms) This Licence Agreement for use with VAAC London QVA Terms (as defined below) incorporates the following: (A) (B) (C) (D) VAAC London QVA Terms; Privacy Policy: http://www.metoffice.gov.uk
THE MET OFFICE STANDARD TERMS & CONDITIONS FOR THE SUPPLY OF SERVICES IN RELATION TO VAAC LONDON QUANTITATIVE VOLCANIC ASH The Customer’s attention is drawn in particular to the provisions of clauses 5 and 10. AGREED TERMS:- 1. Interpretation 1.1 The definitions and rules of interpretation
This is a human-readable summary of (and not a substitute for reading) VAAC London QVA API Licence Agreement and VAAC London QVA Standard Terms. Such summary is merely provided to aid understanding of certain key points. You should carefully read all terms and conditions of VAAC London QVA API
Standard VAAC London QVA API Licence for use with VAAC London QVA Terms
This Licence Agreement for use with VAAC London QVA Terms (as defined below) incorporates the following: VAAC London QVA Terms; Privacy Policy: http://www.metoffice.gov.uk/about-us/legal/privacy; The API Documentation (as defined below); The relevant terms governing an account held with Amazon Web
VAAC LONDON QUANTITATIVE VOLCANIC ASH (QVA) API USER GUIDE First Edition — July 2025 INTERNATIONAL CIVIL AVIATION ORGANIZATION The designations and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of ICAO concerning the legal status
