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Volcanic Ash – T+0 annotated satellite image Issued 1500 UTC on Tue 10 Feb 2015 EXERCISE VOLCICE1502 Chart information for EXERCISE purposes only HIGH CONFIDENCE- - High confidence of IMO radar discerning VA to 12km. MEDIUM CONFIDENCE- Moderate confidence of partial ash signal being discernible in satellite imagery (within ellipse), although partly masked by meteorological clouds. © Crown copyright Met Office

, the manually drawn T+24 SIGWX forecast charts that they will replace. It is important to note that the manually drawn T+24 SIGWX forecasts are not considered to be “the truth” and the new SIGWX forecasts aren’t trying to be identical to them, instead both are verified against observational data sets

by Major Ernest Gold on 24 October 1916. All of Gold's forecasts are available from our Digital Library and Archive. Although the first forecast was brief, with time the forecasts developed to become more detailed and were accompanied by synoptic charts for North West France including short forecasts

the descriptive text. The full volume of plates is available from our Digitial Library & Archive. These include a large scale chart showing the routes of all three voyages and a large collection of plates showing both the locations he visited and most especially the native peoples he encountered. The plates provide a fascinating insight into the differing cultures of the pacific populations in both the northern and southern hemisphere.        

and flooding at Wallingford Hospital, Oxfordshire. A train derailed in a landslip near Watford Junction, injuring two people. The image below shows lightning strikes from a thunderstorm overnight 13 to 14 September at Hebden Bridge, West Yorkshire. Image courtesy fotohebden. Weather data The analysis chart

The National Meteorological Archive houses the national memory of the weather. Our collections include books, diaries, records, charts and other materials relating to meteorology, climatology and weather forecasting. These encompass official Met Office records, which date from 1854 onwards, older

, Nottinghamshire and the West Midlands. Parts of central England experienced extreme rainfall in late September from three successive low pressure systems. The Oxford Radcliffe Observatory recorded its wettest 2-day period in a near 200-year daily record and wettest calendar month since 1774; some locations

icing severity, and turbulence severity data will be produced using exact pressure levels • For example FL100 is calculated using data for 696.8hPa and not 700hPa. This is in preparation for future changes where icing data will be provided at 1000ft intervals. • Where the flight level is below

from 1990 to 2021 has been used to allow comparison to the most recent climatological reference period (Charting the UK;s changing climate - Met Office). Where this full period is not available, the maximum range is used using data from METARs recorded at each airfield. The number of observations

Explanation of detail in F215, 26 th July 2017, valid 0800-1700 UTC 1. Basic Principles The basic principle of the F215 chart is to provide as detailed a forecast as possible in the space available. This gives rise to the use of abbreviations. It is appreciated that there are many abbreviations