Nowcasting for the London Olympics 2012 Brian Golding, Susan Ballard, Nigel Roberts & Ken Mylne Met Office, UK. Crown copyright Met Office
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1 Nowcasting for the London Olympics 2012 Brian Golding, Susan Ballard, Nigel Roberts & Ken Mylne Met Office, UK
2 Outline Context MOGREPS-UK AQUM Weymouth Bay models Summary
3 Forecasting System Generic Products Best data Met Office API 80km high Observations 70 levels 25km du = p fv dt x dv = p + fu dt y p = RT ρ Knowledge Forecast Model Post- Processing Advice
4 Automated public forecasts Seamless NWP, using Unified Model, aiming for single nested 2013 configurations: 33km ensemble + 15km deterministic) global 2.2km ensemble + 1.5km deterministic UK Nowcasts, using 1.5km UKV adjusted to latest observations (using STEPS for precipitation) Site-specific forecasts calibrated with univariate site-specific Kalman Filters Hourly forecasts at 5000 UK global locations to 5 days ahead on web site
5 Public site-specific forecasts
6 Civil Protection & Games support Collaborative decision making by expert forecasters working with other professionals LOCOG supported by forecast advisors at Olympic Park, Eton Dorney & Weymouth Civil Protection supported by advisors and Hazard Manager service: UK National Severe Weather Warning Service Flood Forecasting Centre Hazard Centre delivering the Natural Hazards Partnership: Met Office, Environment Agency, Centre for Ecology and Hydrology, British Geological Survey, Health Protection Agency & others All co-located in the Met Office Exeter Operations Centre
7 WMO Forecast & Research Demonstration Projects Sydney 2000: Nowcasting FDP Beijing 2008: Nowcasting FDP + ensemble RDP Whistler 2010: Mountain nowcasting RDP London 2012: Demonstration of advanced NWP capabilities: 2.2km 6-hourly UK ensemble 1.5km hourly southern-uk NWP nowcast (see separate presentation) 12km Air Quality 300m atmosphere & 250m wave models for Weymouth Bay
8 MOGREPS-UK 2.2km ensemble
9 Convective-scale ensemble: MOGREPS-UK 12 member 2.2km ensemble, run 6-hourly Perturbations from boundary conditions Post-processing uses lagged processing of 2 successive runs + neighbourhood processing to counter sample sparseness Provides confidence measure on fine-scale model detail to forecasters, especially for warnings Expected initial operational acceptance in 2013 Maximum temperature probabilities: 25 th July degrees
10 Preliminary results from 2.2km MOGREPS-UK ensemble 0800 UTC 9 th June
11 Preliminary results from 2.2km MOGREPS-UK ensemble 0000 UTC 29 th June
12 Air Quality Model
13 Air Quality Index: forecast from 23/7/12 Uses UKCA aerosol & chemistry developed for Earth System Model use in Climate Change research Configured for NW Europe on 12km grid Run daily to 5 days using ECMWF boundary conditions
14 Weymouth Bay models
15 Weymouth Bay wind & wave
16 Weymouth Bay models Operational very hi-res models to support Weymouth Bay forecasters for duration of Olympics/Paralympics 333m UM weather forecast model Used for LOCOG Weymouth Bay wind climatology Captures local wind/weather detail missed by 1.5km UKV: frost/fog hollows, beach vs town, park vs urban, mountain waves Could be deployed for UK in 2020, given HPC resources & prioritised requirement 250m SWAN wave forecast model Resolves headlands missed by operational wave model Represents shallow water physics better than Wavewatch III Aim to add physics to WWIII, couple with NEMO-SHELF ocean model & configure to forecast within 1km of UK shoreline by 2020
17 Summary Demonstration of key NWP development areas: 2.2km UK ensemble Hourly rapid update NWP nowcast Air Quality Weymouth wind & wave Used by forecast advisors at Olympic venues Results inform future implementation priorities Feedback welcome!
18 See Questions?
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