Gusts- A rapid fluctuation of wind speed with variations of 10 knots or more between peaks and lulls.
- Browse Related Terms: g, Gust, Kts, MAX, Peak Wind Speed, PK, Rain Shield, Squall, Turbulence, Unimodal, Variable Wind, Variable Wind Direction, Wind Gust, Wind Shift, Wind Speed
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In hydrologic terms,
1) A device for indicating the magnitude or position of a thing in specific units, when such magnitude or position undergoes change, for example: The elevation of a water surface, the velocity of flowing water, the pressure of water, the amount or intensity of precipitation, the depth of snowfall, etc.
(2) The act or operation of registering or measuring the magnitude or position of a thing when these characteristics are undergoing change.
(3) The operation, including both field and office work, of measuring the discharge of a stream of water in a waterway.
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A horizontal surface used as a zero point for measurement of stage or gage height. This surface usually is located slightly below the lowest point of the stream bottom such that the gage height is usually slightly greater than the maximum depth of water. Because the gage datum is not an actual physical object, the datum is usually defined by specifying the elevations of permanent reference marks such as bridge abutments and survey monuments, and the gage is set to agree with the reference marks. Gage datum is a local datum that is maintained indepenÂÂdently of any national geodetic datum. However, if the elevation of the gage datum relative to the national datum (North American Vertical Datum of 1988 or National Geodetic Vertical Datum of 1929) has been determined, then the gage readings can be converted to elevations above the national datum by adding the elevation of the gage datum to the gage reading.
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In hydrologic terms, a particular site on a watercourse where systematic observations of stage/ and or flow are measured.
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An extratropical low or an area of sustained surface winds of 34 (39 mph) to 47 knots (54 mph).
- Browse Related Terms: FQT, Gale, Gale Warning, Hurricane, Hurricane Force Wind Warning, Storm Warning, Subtropical Depression, Subtropical Storm, Super Typhoon, Tropical Depression, Tropical Storm, Typhoon, Wind Advisory
A warning of sustained surface winds, or frequent gusts, in the range of 34 knots (39 mph) to 47 knots (54 mph) inclusive, either predicted or occurring, and not directly associated with a tropical cyclone.
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A warning of 1-minute sustained surface winds in the range 34 kt (39 mph or 63 km/hr) to 47 kt (54 mph or 87 km/hr) inclusive, either predicted or occurring and not directly associated with tropical cyclones.
- Browse Related Terms: Gale Warning, High Wind Warning, Hurricane / Typhoon, Rapid Intensification, Storm Warning, Subtropical Depression, Subtropical Storm, Tropical Depression, Tropical Storm
In hydrologic terms, a passageway within the body of a dam or abutment.
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A unit of magnetic field intensity equal to 1 x 10.0-5 Gauss; also equal to 1 nanotelsa (nT).
- Browse Related Terms: Astronomical Unit, Emerging Flux Region (EFR), Filament, Gamma, Geophysics, Interplanetary Magnetic Field, Leader Spot, Magnetogram, Magnetosphere, MEGG, Mount Wilson Magnetic Classifications, Nanotesla (nT), Neutral Line, PDMT, Plage, Sector Boundary, Sferic, Solar Wind, sunspot, Sunspot Group Classification, Two-Ribbon Flare
A type of electromagnetic radiation with a very short wavelength and high energy level. Generally, emitted during radioactive decay of a substance.
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Strong winds channeled through gaps in the Pacific coastal ranges, blowing out into the Pacific Ocean or into the waterways of the Inside Passage. The winds blow through low passes where major river valleys issue onto the seaways when strong east-west pressure gradients exist between the coast and the inland areas, with low pressure over the ocean.
- Browse Related Terms: Bd, Beaufort Scale, Blowing Snow, Blowing Snow Advisory, BN, Gap Winds, Geostrophic Wind, Nor\'easter, Prevailing Winds, Set-up, Stream line, Westerlies, Wind Couplet
The thermodynamic laws pertaining to perfect gases, including Boyle's law, Charles' law, Dalton's law and the equation of state.
- Browse Related Terms: Adiabatic Process, Ambient, Cap, Capping Inversion, First Law of Thermodynamics, Gas Laws, Ideal Gas Laws, Mid-level Cooling, Pollutant, THSD
In hydrologic terms, a device in which a leaf or member is moved across the waterway from an external position to control or stop flow. There are many different kinds of gates used on a dam
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The unit of magnetic induction in the cgs (centimeter-gram- second) system
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A computer model used to calculate air pollution concentrations. The model assumes that a pollutant plume is carried downwind from its emission source by a mean wind and that concentrations in the plume can be approximated by assuming that the highest concentrations occur on the horizontal and vertical midlines of the plume, with the distribution about these mid-lines characterized by Gaussian- or bell-shaped concentration profiles.
- Browse Related Terms: AGDISP, Box Model, Chemistry Model, Diagnostic Model, domain, Full-Physics Numerical Model, Gaussian Plume Model, Gaussian Puff Model, Perturbation Model, Phenomenological Model, VALDRIFT
A model used to calculate air pollution concentrations. The model assumes that a continuously emitted plume or instantaneous cloud of pollutants can be simulated by the release of a series of puffs that will be carried in a time- and space-varying wind field. The puffs are assumed to have Gaussian or bell-shaped concentration profiles in their vertical and horizontal planes.
- Browse Related Terms: AGDISP, Box Model, Chemistry Model, Diagnostic Model, domain, Full-Physics Numerical Model, Gaussian Plume Model, Gaussian Puff Model, Perturbation Model, Phenomenological Model, VALDRIFT
General
- Browse Related Terms: ABT, ABV, ACRS, AFT, AFTR, AGN, ALG, ALTHO, AMD, AOA, AOB, ARND, AVBL, BCM, BCMNG, BFR, BGN, BHND, BLO, BLV, BRF, BTR, BTWN, BYD, CFC, CHGS, CLR, DMSH, DURG, EBND, EFCT, ELSW, ENDG, ERLY, EXCLD, FASTST, FM, FTHR, GEN, GNRL, GRT, GRTST, GTR, HND, HV, HWVR, IMPT, INDC, LN, LRG, LTL, LTR, LTST, MDNGT, METRO, MISC, MISG, MNLY, MR, MSTLY, NBND, NEC, NIL, NLY, NMBR, NR, NWLY, NWRD, NWRN, NXT, OTR, OTRW, OVR, PCT, PRBLY, PSBL, PSBLY, QG, RIOGD, RTRD, RW, SBND, SEWD, SGFNT, SPCLY, SS-, Sun Dog, SVRL, SWWD, SXN, TDA, THRFTR, THRU, THRUT, TIL, TWD, WBND, WL, XCITED, YDA
The totality of large-scale organized motion for the entire global atmosphere.
- Browse Related Terms: General Circulation, Intraseasonal Oscillation, Klystron, LLJ, Low Level Jet, Madden-Julian Oscillation, MJO
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