Terms R

rainband

Röntgen ray

réseau

RVR

rush of snowmelt flood

runway visual range

runway visibility

runway temperature

runway observation

runway elevation

runoff plot

runoff cycle

runoff coefficient

runoff

rules of inference

rule-based system

rule

rubber ice

route forecast

route cross section

route component

roundoff error

roughness sublayer

rough air

rotten ice

rotoscope

rotenturm wind

rotational instability

rotational

rotating Reynolds number

rotating multicylinder

rotary current

Rossby–gravity wave

Rossby wave

Rossby regime

Rossby radius of deformation

Rossby parameter

Rossby number similarity

Rosemount temperature housing

rosau

rope cloud

root-mean-square error

rondada

ROMET

rolls

rollers

roll cloud

ROFOT

ROFOR

rocketsonde

rocket-triggered lightning

rocket lightning

rocket

rockair

Robitzsch actinograph

robin sphere

Robin Hood's wind

ROB

roaring forties

Road weather

RMTN

rmse

river system

river surface temperature

river stage

river gauge

river forecast

river basin

river

rising tide

rising limb

rise time

ripple wave

ripple

ripening of snow

ripe

rip current

rip

Ringelmann chart

Rinehart projection

rime rod

rime ice

rime fog

rime

right-handed rectangular coordinates

right-hand rotation

right ascension

riefne

ridge line

Richardson number

ribut

ribbon lightning

rhumb-line course

RHI

RF signal

RF

Reynolds stresses

Reynolds number

Reynolds effect

Reynolds averaging

revolving storm

revised local reference

reversing thermometer

reversing current

reversible process

reversible moist-adiabatic process

reverse-oriented monsoon trough

reverse flow thermometer housing

reverse cell

reversal temperature

reversal of the monsoon

returning polar maritime air

return stroke

return period

return flow

retroreflector

retroreflection

retrogression

retrograde wave

retrograde depression

retreater

retention storage

retention curve

retarding basin

retarded flow

resultant wind

resultant

restoring

rest mass

responsive parameterization

response function

response analysis

responder

resonator

resonance waves over thermals

resonance waves over hills

resonance trough

resonance theory

resonance fluorescence

resonance

resistivity

resistance thermometer

residual mass curve

residual layer

residual depression storage

residual

residence time

reshabar

reservoir compounds

reservoir

Research to Operations

representativeness

representative meteorological observation

representative basin

remote sensing

relaxed eddy accumulation

relaxation time

relaxation of a trough

relaxation method

relative vorticity

relative velocity

relative sea level

relative reduction

relative permittivity

relative permeability

relative momentum

relative ionospheric opacity meter

relative humidity with respect to ice

relative frequency

relative evaporation

relative current

relative coordinate system

relative angular momentum

regular broadcast

regression line

regression equation

regression coefficient

regression analysis

regression

register

Regional Meteorological Telecommunications Network

Regional Meteorological Center

regional forecast

regional climate model

regional broadcast

regional basic synoptic network

regional analysis

regional air pollution

region of influence

regime channel

regime

regeneration of a depression

regelation

refractometer

refractivity

refractive index

refraction of water waves

refraction diagram

refraction coefficient

refraction

reflector

reflectivity factor

reflectivity

reflection rainbow

reflection coefficient

reflection

reflectance

reference crop evaporation

Reech number

reduction of temperature to mean sea level

reduction of pressure to a standard level

reduction

reduced pressure

reduced grid

reduced gravity

red tide

red snow

Red Sea Water

red noise

red flash

recycled water

recurvature

recurrence formula

recovery time

recovery test

recording potentiometer

recording instrument

recording albedometer

record observation

reconnaissance

recon

recombination energy

recombination coefficient

recombination

recirculation

recharge capacity

recharge area

recharge

recession curve

recession

receiver gain

receiver (noise) temperature

receiver

received power

RECCO code

recco

reboyo

rebat

Reaumur temperature scale

rear-inflow jet

rear of a depression

reanalysis

real-time transmission

real-time processing

real time

reaction rate

reaction order

reaction kinetics

reach

RDF

Rayleigh–Bénard convection

Rayleigh's formula

Rayleigh wave

Rayleigh scattering

Rayleigh phase function

Rayleigh optical depth

Rayleigh number

Rayleigh atmosphere

ray tracing

ray

rawinsonde observation

rawin target

rawin

raw water

raw moment

raw

rational method

rating flume

rating curve

rate-of-climb indicator

rate of accretion

rate constants

rate coefficient

RASS

RASAPH

RAREP

rare optical phenomenon

rare gases

rapid interval scan

rapid interval imaging

rapid distortion theory

Raoult's law

RAOB

Rankine vortex

Rankine temperature scale

range–height indicator

range resolution

range normalization

range marker

range gate

range error

range distortion

range attenuation

range aliasing

range

randomness

randomized seeding trial

randomization

random walk model

random variable

random sea

random sample

random process

random numbers

random forecast

random error

random

ramsonde

ramp structure

ram penetrometer

rainy season

rainy climate

rainstorm

rainfall station

rainfall regime

rainfall rate

rainfall loss

rainfall intensity return period

rainfall intensity pattern

rainfall frequency

rainfall excess

rainfall duration

rainfall distribution

rainfall

raindrop spectrograph

raindrop size distribution

raindrop

rainbow

rain-out

rain-intensity gauge

rain-gauge shield

rain washout

rain stimulation by artificial means

rain stage

rain simulator

rain shower

rain shadow

rain making

rain gauge

rain forest climate

rain forest

rain factor

rain day

rain crust

rain cloud

rain attenuation

rain and snow mixed

rain

raggiatura

ragged ceiling

rafted ice

RAFOS technology

raffiche

radon

radome

RADOB

radix layer

radius of protection

radiosonde system

radiosonde station

radiosonde ground equipment

radiosonde balloon

radiometry

radiometer

radiomaximograph

radioactivity

radioactive-particle ionization

radioactive snow gauge

radioactive precipitation

radioactive gas

radioactive fallout

radioactive decay

radioactive dating

radioactive carbon

radio wind observation

radio waves

radio wave

radio source

radio sounding

radio navigation aid

radio meteorology

radio horizon

radio hole

radio frequency band

radio frequency

radio direction finding

radio direction finder

radio climatology

radio beacon

radio atmometer

radio acoustic sounding system

radiatus

radiator

radiatively active gas

radiative–convective model

radiative–convective equilibrium

radiative transfer

radiative heating

radiative forcing

radiative flux divergence

radiative flux density

radiative equilibrium

radiative cooling

radiational tide

radiational cooling

radiation torque

radiation shield

radiation pressure

radiation pattern

radiation model

radiation laws

radiation inversion

radiation frost

radiation fog

radiation chart

radiation belts

radiation

radiant-energy thermometer

radiant intensity

radiant flux density

radiant flux

radiant exposure

radiant exitance

radiant energy

radiant density

radiant

radiance

radian

radial wind

radial velocity

radial symmetry

radial inflow

radarscope

radar–rain gauge comparison

radar wind system

radar wind sounding

radar weather observation

radar theodolite

radar storm detection

radar sounding

radar signal spectrograph

radar scatterometer

radar return

radar resolution

radar report

radar reflectivity

radar polarimetry

radar observation

radar mile

radar meteorology

radar meteorological observation

radar interferometry

radar hydrology

radar frequency band

radar equation

radar duct

radar displays

radar cross section

radar constant

radar coded message

radar climatology

radar calibration

radar beam

radar band

radar altitude

radar altimeter

radar algorithm

radar

racoon

rabal

R-scope

R-scale

R-meter

Residual variance

Resistance