1. Scenario #1 Response Urban Sarin HIGH Trained Response Personnel Source -pooled, surface characteristics/properties MicroMeteorology - wind, heating, turbulence characterization, interaction with surface geometry/ phys. properties Resolution -DX, DZ = 1 m Dt<60 sec Range to 10 km (hazard) to 100 km (met) MEDIUM Training

2. Scenario #2 Response Dirty Nuke Nowcast Emphasis on Evacuation HIGH Incident Characteristics Source Location(s) Wind Direction & Speed (best onsite) Deposition & particle sizes Precip Quick runtime Simple inputs MEDIUM Wind variability Resuspension Plume rise Stability Accuracy LOW Building morphology Terrain

3. Scenario #3 Response Nuclear Power Plant HIGH Fast model for “what if” in 3 hrs Temporal source term Long range; long duration Weather transitions and PBL Observed & forecast WX Onsite met with mobile backup Mixed fission and daughter products Wet / Dry deposition Terrain GIS mapping MEDIUM Buoyancy / plume rise LOW Land use / BL interaction Building Wake effects Issues Coastal Meteorology Meso Net Modules for dispersion Applicability

4. Scenario #4 Response -Anthrax Crop Duster HIGH Source - Knowing, rerease time, virility, UV, release height SAME AS 3 Deposition - land use, buildings Small mesoscale resolution Range to 100+ km GIS interface Multiple time scales Quantify uncertainty Continual update / reanalysis