Active ProminenceIn solar-terrestrial terms, a prominence displaying material motion and changes
in appearance over a few minutes of time.Active Prominence Region (APR)In solar-terrestrial terms, a portion of the solar limb displaying active prominences.Cold Air Damming (CAD)The phenomenon in which a low-level cold air mass is trapped topographically. Often, this cold air is entrenched on the east side of mountainous terrain. Cold Air Damming often implies that the trapped cold air mass is influencing the dynamics of the overlying air mass, e.g. in an overrunning scenario.
Effects on the weather may include cold temperatures, freezing precipitation, and extensive cloud coverEruptive Prominence on Limb (EPL)In solar-terrestrial terms, a solar prominence that becomes activa-
ted and is seen to ascend from the sun.fMinIn solar-terrestrial terms, the lowest radiowave frequency that can be reflected from the
ionosphere.Global WarmingAn overall increase in world temperatures which may be caused by additional heat being trapped by greenhouse gases. Hail ContaminationA limitation in NEXRAD rainfall estimates whereby abnormally high reflectivities associated with hail are converted to rainfall rates and rainfall accumulations. These high reflectivity values are mistaken by the radar for extremely heavy rain, thus "contaminating" (inflating) its estimation of how much rain has fallen over the affected area.LaminarSmooth, non-turbulent. Often used to describe cloud formations which appear to be shaped by a smooth flow of air traveling in parallel layers or sheets.Laminar FlowStreamline flow in which successive flow particles follow similar path lines and head loss varies with velocity to the first power.Loop Prominence System(abbrev. LPS) In solar-terrestrial terms, a system of loop prominences associated with
major flares.MINMinimum (or) MinuteMinimum Discernible SignalIn a receiver, it is the smallest input signal that will a produce a detectable signal at the output. In radar terms, it is the minimal amount of back scattered energy that is required to produce a target on the radar screen. In other words, MDS is a measure of the radar's sensitivity. Minimum TemperatureThis is the lowest temperature recorded during a specified period of time. The time period can be 6, 12 or 24 hours. The most common reference is to the daily minimum temperature, or "low."Minor FloodingA general term indicating minimal or no property damage but possibly some public inconvenience.Minor Tidal OverflowMinor flooding caused by high tides that results in little if any damage. MINTminimum temperaturePlume-dominated FireA fire whose behavior is governed primarily by the local wind circulation produced in response to the strong convection above the fire rather than by the general wind.Predominant WindThe wind that prevails and generates the local component of the significant sea conditions across the forecast area. This is the wind included in all marine forecast products and is defined as a 10-meter wind, except over the nearshore marine zones where it is defined to be the wind at a 3-meter height.Preliminary ReportNow known as the "Tropical Cyclone Report". A report summarizing the life history
and effects of an Atlantic or eastern Pacific tropical cyclone. It contains a summary of
the cyclone life cycle and pertinent meteorological data, including the post-analysis
best track (six-hourly positions and intensities) and other meteorological statistics. It
also contains a description of damage and casualties the system produced, as well
as information on forecasts and warnings associated with the cyclone. NHC writes
a report on every tropical cyclone in its area of responsibility.Prominence A term identifying cloud-like features in the solar atmosphere.
The features appear as bright structures in the CORONA above the
solar LIMB and as dark FILAMENTs when seen projected against the
solar DISKQuiescent Prominence (Filament) Long, sheet-like prominences nearly vertical
to the solar surfaceSolar MinimumIn solar-terrestrial terms, the month(s) during the solar cycle when the 12-month mean of monthly average sunspot numbers reaches a minimum.Terminal Aerodrome ForecastThis NWS aviation product is a concise statement of the expected meteorological conditions at an airport during a specified period (usually 24 hours). Each country is allowed to make modifications or exceptions to the code for use in each particular country. TAFs use the same weather code found in METAR weather reports.
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