RCKY
RCMD
RCV
RDG
RDS
Reach
Real Time
Rear Flank Downdraft
receiver
Reconnaissance Code
Record Event Report
Recreation Report
recurrence
Red Flag
Red Flag Warning
| Red Watch or Red Box
REF
Reference Mark
reflection
reflectivity
Reflectivity Cross Section
Reflectivity Factor
refraction
Refractive Index
Refractivity
Regional Haze
Relative humidity
Relative Vorticity
Relative Wind
RELBL
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