Used to take the place of an E-19 in documenting any gage history, or information of any non-forecast point (i.e data point). An E-19a is to be completed anytime a significant change occurs at a forecast point. E-19a, Abridged Report on River Gage Sta In hydrologic terms, an abridged version of an E-19, an E-19a updates the E-19 as additional information, or changes occur at the station during the Note that aĭebris cloud appearing beneath a thunderstorm will confirm the presence of a tornado, even in theĪbsence of a condensation funnel. A dust plume, on the other hand, does not rotate. This term is similar to dust whirl, although the latter typically refers to a circulation which containsĭust but not necessarily any debris. Debris Cloud A rotating "cloud" of dust or debris, near or on the ground, often appearingīeneath a condensation funnel and surrounding the base of a tornado. DAMBRK In hydrologic terms, the Dam Break Forecasting Model. Calibration In hydrologic terms, the process of using historical data to estimate parameters in a hydrologic forecast technique such as SACSMA, routings, and unit hydrographs. Broken Level A layer of the atmosphere with 5/8 to 7/8 sky cover (cloud cover). The shadow's head is surrounded by rings of color, called a glory. Brocken Specter An optical phenomenon sometimes occurring at high altitudes when the image of an observer placed between the sun and a cloud is projected on the cloud as a greatly magnified shadow. Of the transmission by the subdivision of the bandwidth intoĬhannels based on frequency. Broadband A method of signaling in which multiple signals share the bandwidth Of around 50 to 100 suggest environmental conditions favorable for supercell development. High values indicate unstable and/or weakly-shearedĮnvironments low values indicate weak instability and/or strong vertical shear. Shear (generally, stability divided by shear). BRK Break BRN (Bulk Richardson Number) A non-dimensional number relating vertical stability and vertical Brightness A basic visual sensation describing the amount of light that appears to emanate from an object, or more precisely, the luminance of an object Brisk 15 to 25 mph winds Brisk Wind Advisory A Small Craft Advisory issued by the National Weather Service for ice-covered waters. Bright Surge on the Limb (BSL) In solar-terrestrial terms, a large gaseous stream (surge) that moves outward more than 0.15 solar radius above the limb. Bright Surge on the Disk (BSD) In solar-terrestrial terms, a bright gaseous stream (surge) emanating from the chromosphere. Bright Band The enhanced radar echo of snow as it melts to rain. The bright band can affect the ability of the NEXRAD algorithms to produce accurate rainfall estimates at far ranges because the algorithm may interpret reflectivity from the bright band as an overestimate of precipitation reaching the surface. These particles reflect significantly more radiation (appearing to the radar as large raindrops) than the portions of the cloud above and below the freezing layer. The freezing level in a cloud contains ice particles that are coated with liquid water. ![]() The term originates from a horizontal band of enhanced reflectivity that can result when a radar antenna scans vertically through precipitation. ![]() Breezy 15 to 25 mph winds BRF Brief Bright Band A distinct feature observed by a radar that denotes the freezing level of the atmosphere. Breakup Period In hydrologic terms, the period of disintegration of an ice cover. ![]() Breakup Jam In hydrologic terms, an ice jam that occurs as a result of the accumulation of broken ice pieces. Breakup Date In hydrologic terms, date on which a body of water is first observed to be entirely clear of ice and remains clear thereafter. Breakup is signaled by the breaking of the ice and often associated with ice jams and flooding. Breakup In hydrologic terms, the time when a river whose surface has been frozen from bank to bank for a significant portion of its length begins to change to an open water flow condition. Depends on wave steepness and bottom bathymetry. Breakers Waves that break, displaying white water. BRD Border Breach In hydrologic terms, the failed opening in a dam. Brash Ice In hydrologic terms, accumulation of floating ice made up of fragments not more than 2 meters across the wreckage of other forms of ice. A braided stream is composed of anabranches. Braided Stream In hydrologic terms, characterized by successive division and rejoining of streamflow with accompanying islands. BR Mist Brackish Ice In hydrologic terms, ice formed from brackish water. Beginning of the Breakup In hydrologic terms, date of definite breaking, movement, or melting of ice cover or significant rise of water level. NOAA's National Weather Service - Glossary Anabranch A diverging branch of a river which re-enters the main stream.
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