Observation A weather or meteorological observation is an evaluation of one or more meteorological elements that describes the state of the atmosphere either at the Earth's surface or aloft.
Components of the Observation Symbol:
1) Fill in the blanks of the diagram to indicate what type of meteorological data is represented by each location. You may label the diagram in one of two ways; 1) by printing out a copy of this activity and ...
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Observations
Basic weather data are obtained from more than 60 Bureau-staffed observing stations around Australia, on offshore islands, and in the Antarctic.
observational error"The difference between the true value of some quantity and its observed value. Every observation is subject to certain errors, as follows. 1) Systematic errors affect the whole of a series of observations in nearly the same ...
observation - See weather observation.
ocean - 1. The intercommunicating body of saltwater occupying the depressions of the earth's surface. 2.
Observation well - permalink - collapse
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In hydrologic terms, a non-pumping well used for observing the elevation of the water table or piezometric surface
NOAA National Weather Service - Cite This Source - This Definition ...
Observation Well
In hydrologic terms, a non-pumping well used for observing the elevation of the water table or piezometric surface
Occluded Front ...
OBSERVATION
In meteorology, the evaluation of one or more meteorological elements, such as temperature, pressure, or wind, that describe the state of the atmosphere, either at the earth's surface or aloft.
Observation Well: A non-pumping well used for observing the elevation of the water table or piezometric surface.
Observation and forecasting
Observation
Main article: Tropical cyclone observation ...
OBS- Observation, a reporting station's output
OCCLUDED FRONT- The lifting of one front by another.
RADARSONDE OBSERVATION An upper air observation used to determine winds and other meteorological data, by tracking the range, elevation, and azimuth of a radar target carried aloft. A type of rawinsonde.
Rawinsonde Observation: A radiosonde observation which includes wind data.
radarsonde observation—A rawinsonde observation in which winds are determined by radar tracking a balloon-borne target.
METAR A weather observation near ground level. It may include date and time, wind, visibility, weather and obstructions to vision, sky condition, temperature and dew point, sea level pressure, ...
It is reported as "SA" in an observation and on the METAR. SANDSTORM A strong wind carrying sand particles through the air. They are low level occurances, usually only ten feet in height to not more than fifty feet above the surface.
Radar MeteorologyBranch of meteorology that uses radars for weather observations and forecasts.Radar MosaicA radar product that combines information from multiple radars to give a regional or national view of reflectivity or precipitation.
Gaging StationIn hydrologic terms, a particular site on a watercourse where systematic observations of stage/ and or flow are measured. GaleAn extratropical low or an area of sustained surface winds of 34 (39 mph) to 47 knots (54 mph).
A facility where weather observations are taken, prepared, and transmitted by a local operator under federal government supervision. SCADA Supervisory Control and Data Acquisition.
State Weather RoundupThis is a National Weather Service tabular product which provides routine hourly observations within the state through the National Weather Wire Service (NWWS).
Pressure tendencyThe character and amount of atmospheric pressure change during a specified period of time, usually the three-hour period preceding an observation.
Few CloudsAn official sky cover classification for aviation weather observations, descriptive of a sky cover of 1/8 to 2/8.
that corresponds to a single general circulation model grid column, to use models to compute the cloud formation and radiative transfer processes, and to evaluate the results produced by the models through comparisons with additional observations.
Observed noise is the standard deviation or natural variability computed from observations of that variable and adjusted for sample size, autocorrelation, and time averaging. silviculture Management of forest land for timber.
Not long after the electric telegraph made simultaneous (i.e. 'synoptic') observations possible in near 'real time', it was realised that in regions of 'disturbed' weather, (i.e. close to what we now call a depression), ...
These are estimated surface pressure observations for the southern hemisphere derived from satellite observations, interpolated from conventional data (ship, buoy, or land surface barometer readings), ...
The goal of TRMM is to obtain a minimum of 3 years of climatologically significant observations of rainfall in the tropics. Because rainfall is such a variable phenomenon, adequate sampling is a difficult problem.
Computed from observation time temperature, humidity and cloudiness.
10-hr: 1/4" to 1" diameters.
Descriptive climatology deals with the observed geographic or temporal distribution of meteorological observations over a specified period of time.
RAOB - RAdiosonde OBservation
SAB - Satellite Applications Branch (old. NESDIS)
SAFIRE - Spectroscopy of the Atmosphere using Far InfraRed Emission
SAGE - Stratospheric Aerosol and Gas Experiment (EOS) ...
Surface weather chart: an analyzed synoptic chart of surface weather observations.
rawinsonde - An upper-air weather observation system (from the surface to approximately 30 km altitude) made by balloon-borne instrument package (radiosonde) that provides direct measurement of ambient air temperature, pressure, ...
The average height of the sea surface, based upon hourly observation of the tide height on the open coast or in adjacent waters that have free access to the sea.
Thus the 5th percentile is that value which marks off the lowest 5 per cent of the observations from the rest, the 50th percentile is the same as the median, and the 95th percentile exceeds all but 5 per cent of the values.
CHASE POSITION - The area around or nearby a storm where storm chasers perfer to make their observations.
Since a true water barometer would be over 10 m (33 ft) in length, they are not practical for weather observations. (2) A form of barometer aslo known as a "storm glass" or "thunder glass.
Sounding-based Stability Index - an index calculated from balloon observations (e.g., CAPE, Lifted Index, K-Index, Bulk Richardson Number, Total-Totals Index) that provide guidance about the potential organization, type, ...
NOAA WEATHER RADIO (NWR): Continuous, 24 hour a day VHF broadcasts of weather observations and forecasts directly from National Weather Service offices. A special tone allows certain receivers to alarm when watches or warnings are issued.
RAWINSONDE: A method of upper air observation consisting of an evaluation of the wind speed and direction, temperature, pressure,and humidity aloft by means of a balloon-borne radiosonde tracked by radar or a radio theodolite.
ASOS- the Automated Surface Observation System; this system observes sky condition, weather, temperature, dew point, wind direction and speed, pressure and precipitation.
Fair-weather bias The observation that fair weather days outnumber stormy days almost everywhere.
Flash flood A sudden rise in river or stream levels causing flooding.
NCDC: National Climatic Data Center. The archive center for climate, observational and forecast data from the National Weather Service (NWS).
Reed's Nautical Companion gives photographs of the sea's surface for each wind force, so that the force can be estimated by simple observation.
Mobile storm spotters are strongly advised to maintain a safe distance from any storm that has been identified as an HP storm; close observations (e.g., core punching) can be extremely dangerous. See bear's cage.
This system is a collection of automated weather instruments that collect data. It performs surface based observations from places that do not have a human observer, or that do not have an observer 24 hours a day.
Mobile Mesonet - A group of vehicles equipped with observation stations, usually used for research. Also see mesonet.
Automated Surface Observing System (ASOS) - A widely used, standardized set of automated weather instruments that provide routine surface observations. (less accurate than conventional measurements) ...
BLOWING DUST Dust that is raised by the wind to heights of six feet or greater. It is reported as "BLDU" in an observation and on the METAR.
 See also: Weather, Surface, Temperature, Air, Meteor
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