A means of avoiding winds associated with a tropical cyclone by taking into account the forecast track error of the National Weather Service over a 10 year period which is approximately 100 nm in 24 hours, 200 nm for 48 hours and 300 nm in 72 hours. The forecast track error is added to the 34 knot wind radii to compute the danger area. The wind radii may be found within Tropical Cyclone Forecast Advisory (TCM) forecasts.
- Browse Related Terms: 1-2-3 Rule, AGFS, Complex Gale/Storm, CWFA, Developing Gale/Storm, FA, FCST, FOUS, Grids, High Seas Forecast, Marine Zone, NSSFC, OFSHR, PROGGED, Radar Meteorology, RAFC, RAFS, Red Flag Warning, TAF, Valid Time, ZFP
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1 million British thermal units, or 1 dekatherm. Approximately equal to 1,000 cubic feet (Mcf) of natural gas.
- Browse Related Terms: 1 million British thermal units or 1 dekatherm (MMBtu), 1 million cubic feet (MMCF), dekatherm or decatherm (DTH), MCF, Therm
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1 million cubic feet (of gas), or 1,000 Mcf.
- Browse Related Terms: 1 million British thermal units or 1 dekatherm (MMBtu), 1 million cubic feet (MMCF), dekatherm or decatherm (DTH), MCF, Therm
A statistic that indicates the magnitude of flood which can be expected to occur on average with a frequency of once every 100 years at a given point or reach on a river. The 100-year flood is usually developed from a statistical distribution that is based on historical floods. This is also called a base flood.
- Browse Related Terms: 100-year Flood, 100-year Flood Plain, Base Flood, Channel Routing, DNSTRM, Flood Frequency Curve, Flood Plain, Flood routing, Floodway, Lag, Lakeshore Flood Advisory, Lakeshore Flood Watch, Lakeshore Flooding, routing, Travel Time
The flood plain that would be inundated in the event of a 100-year flood.
- Browse Related Terms: 100-year Flood, 100-year Flood Plain, Base Flood, Channel Routing, DNSTRM, Flood Frequency Curve, Flood Plain, Flood routing, Floodway, Lag, Lakeshore Flood Advisory, Lakeshore Flood Watch, Lakeshore Flooding, routing, Travel Time
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That area that would be covered by water during the 100-year flood event.
- Browse Related Terms: 100-year floodplain, Gross heating value (GHV), Head, Higher Heating Value (HHV), Historic floodplain, Moisture Content (MC), Moisture content, dry basis (MCDB), Moisture content, wet basis (MCWB), Net heating value (NHV), Thermal Efficiency, Ultimate analysis
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The area that would be inundated by water during a flood event, having a one-percent chance of being equaled or exceeded in magnitude, in any given year.
- Browse Related Terms: 100-year floodplain, Aquifer-unconfined, Artesian water (artesian pressure), Confined aquifer, Hydraulic gradient, Impoundment (surface), Rebound (of water levels), Recharge, Sole source aquifer, Transmissivity, Unconfined aquifer
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Prices for the next 12 months of consecutive natural gas futures trading contracts, usually starting with the nearest, or prompt, month.
- Browse Related Terms: 12-month strip, Arbitrage, Delivery Point(s), Financial transmission right, Forward price curve, Futures market, Henry Hub, Locational marginal price, long, Mark-to-market, Physical basis, Reference price, Short position, Spark spread, Uplift, West Texas Intermediate (WTI)
Shorthand for a filter that has a peak transmission at, or close to, 171 angstroms. AIA and EIT have non-identical filters that create monochromatic images around this wavelength (and so the images can appear slightly different). It is customary to assign a false color to these images in order to create a pleasing visual impression; AIA chooses yellow, and EIT chooses a blue color.
- Browse Related Terms: 171, Electromagnetic Spectrum, Faculae, Gamma Rays, Infrared, Infrared (IR) Radiation, Ionization, radiation, Radio Waves, Solar Flare, Solar Ultraviolet Irradiance, Spectrograph, spectrum, Ultraviolet, Visible Light, Wavelength, X-Rays
- A communication facility at a State or local level, operating 24 hours a day, which has the capability to receive alerts and warnings from Reclamation, plus activate the public warning system in its area of responsibility.
- Browse Related Terms: 24-hour warning point, ALERT Flood Warning System, Decision making, Detection, Early warning system feasibility, EWS, IFLOWS, Implementation process, Integrated early warning system, LFWS, Notification, Operations and Maintenance (O&M), Warning
Pressure surface (geopotential height) in the troposphere equivalent to about 18,000 feet above sea level. Level of the atmosphere at which half the mass of the atmosphere lies above and half below, as measured in pressure units. This area is important for understanding surface weather, upper air storms tend to be steered in the direction of the winds at this level and are highly correlated with surface weather.
- Browse Related Terms: 500 hPa, 500 mb, Constant Pressure Chart, Engineer's Level, Extraterrestrial Radiation, Isobaric Chart, Isoheight, Lithometeor, Precision, REP, Station pressure, Theodolite, Tides, Upper-air Weather Chart
Pressure surface (geopotential height) in the troposphere equivalent to about 18,000 feet above sea level. Level of the atmosphere at which half the mass of the atmosphere lies above and half below, as measured in pressure units. This area is important for understanding surface weather, upper air storms tend to be steered in the direction of the winds at this level and are highly correlated with surface weather.
- Browse Related Terms: 500 hPa, 500 mb, Constant Pressure Chart, Engineer's Level, Extraterrestrial Radiation, Isobaric Chart, Isoheight, Lithometeor, Precision, REP, Station pressure, Theodolite, Tides, Upper-air Weather Chart
Doppler Radar currently used nationwide by the National Weather Service.
- Browse Related Terms: 88D, AMVER/SEAS, Congressional Organic Act of 1890, NAVTEX Forecast, NOAA Weather Radio, NWR, NWSH, Pan Pan, S-Band Radar, Securite, SIGWX, Wind Waves, WX