Subj : Wx Terms (R)(5) To : All From : Daryl Stout Date : Tue Sep 19 2017 12:08 am Rope Cloud In satellite meteorology, a narrow, rope-like band of clouds sometimes seen on satellite images along a front or other boundary. The term sometimes is used synonymously with rope or rope funnel. Rope Stage The dissipating stage of a tornado, characterized by thinning and shrinking of the condensation funnel into a rope (or rope funnel). Damage still is possible during this stage. ROSA Remote Observing System Automation. A type of automated data transmitter used by NWS Cooperative Program observers. Rossby Waves A series of troughs and ridges on quasi-horizontal surfaces in the major belt of upper tropospheric westerlies. The waves are thousands of kilometers long and have significant latitudinal amplitude. Rotation The spinning of a body, such as the earth, about its axis. ROTG Rotating Rotor Cloud A turbulent altocumulus cloud formation found in the lee of some mountain barriers when winds cross the barrier at high speed. The air in the cloud rotates around an axis parallel to the range. Also called a roll cloud. Rotten Ice In hydrologic terms, ice in an advanced stage of disintegration. Rough Seas Sea conditions associated with regionally defined wind thresholds over bays, inlets, harbors, inland waters, and estuaries where larger waves are forming with whitecaps and spray everywhere. Routing In hydrologic terms, the methods of predicting the attenuation of a flood wave as it moves down the course of a river. RPD Rapid RPLC Replace RPRT Report RQR Require RRQ Right Rear Quadrant - the area upstream from and to the right of an upper-level jet max (as would be viewed looking along the direction of flow). Upward motion and severe thunderstorm potential sometimes are increased in this area relative to the wind speed maximum. See also exit region, left front quadrant. RSG Rising RSN Reason RTE Route RTRD Retard RTRN Return RTVS Real Time Verification System RUC Rapid Update Cycle model, a numerical model run by NCEP that focuses on short-term forecasts out to 12 hours. Runoff In hydrologic terms, the part of precipitation that flows toward the streams on the surface of the ground or within the ground. Runoff is composed of baseflow and surface runoff. Runway Visual Range The maximum distance at which the runway, or the specified lights or markers delineating it, can be seen from a position above a specified point on its center line. This value is normally determined by visibility sensors located alongside and higher than the center line of the runway. RVR is calculated from visibility, ambient light level, and runway light intensity. RVA River Summary, a NWS summary of river and/or crest stages for selected forecast points along the river. RVF River Forecast. An internal product issued by RFCs to other NWS offices. An RVF contains stage and/ or flow forecasts for specific locations based on existing, and forecasted hydrometeorologic conditions. The contents of these products are used by the HSA office to prepare Flood Warnings (FLW), Flood Statements (FLS), River Statements (RVS), as well as other products available to the public. RVI River Ice Statement RVR 1. Runway Visual Range - the maximum distance at which the runway, or the specified lights or markers delineating it, can be seen from a position above a specified point on its center line. This value is normally determined by visibility sensors located alongside and higher than the center line of the runway. RVR is calculated from visibility, ambient light level, and runway light intensity. 2. River RVS 1. Abbreviation for "revise" 2. River Statement, a product issued to communicate notable hydrologic conditions which do not involve flooding, i.e., within river bank rises, minor ice jams, etc. RW Rainshower --- þ Synchronet þ The Thunderbolt BBS - wx1der.dyndns.org .