Specific-Area Message Encoding.
This feature of weather radios only alerts you to advisories in your area. You must enter your desired codes into the radio. Seneca county is : 039147.
A scale that measures hurricane intensity, developed by Herbert Saffir and Robert Simpson.
Serial ATA. Offers much more speed than traditional ATA drives.
A cloud layer that covers between 3/8ths and 1/2 of the sky.
A strong thunderstorm with wind gusts in excess of 58 mph (50 knots) and/or hail with a diameter of 3/4" or more. A thunderstorm with winds greater than 39 mph and/or hail greater than ? inch is defined as approaching severe.
Issued when thunderstorms are expected to have wind gusts to 58 mph or above or hail 3/4 inch or more in diameter.
Issued when conditions are favorable for the development of severe thunderstorms in and close to a defined area.
In probability of precipitation statements, usually equivalent to a 20 percent chance.
A marine advisory for winds 25 to 33 knots (29 to 38 mph) or seas of 5 feet or more, that may cause hazardous conditions for operators of small vessels.
Pollution formed by the interaction of pollutants and sunlight (photochemical smog), usually restricting visibility, and occasionally hazardous to health.
A suspension in the air of small particles produced by combustion. A transition to haze may occur when smoke particles have traveled great distances (25 to 100 statute miles or more) and when the larger particles have settled out and the remaining particles have become widely scattered through the atmosphere.
Frozen precipitation composed of ice particles in complex hexagonal patterns. Snow forms in cold clouds by the direct transfer of water vapor to ice.
Older terminology replaced by winter weather advisory. An advisory issued when 4, 5, or 6 inches of snow or sleet is expected in 24 hours. It is expected to create hazardous or restricted travel conditions, but not as severe as expected with a winter storm.
The vertical height of frozen precipitation on the ground. For this purpose, frozen precipitation includes ice pellets, glaze, hail, any combination of these, and sheet ice formed directly or indirectly from precipitation.
Light snow showers, usually of an intermittent nature and short duration with no measurable accumulation.
Precipitation of very small, white, opaque grains of ice.
Precipitation of white, opaque grains of ice. The grains are round or sometimes conical. Diameters range from about 0.08 to 0.2 inch (2 to 5 mm).
Snow falling at varying intensities for brief periods of time. Some accumulation is possible.
Intense, but of limited duration, periods of moderate to heavy snowfall, accompanied by strong, gusty surface winds and possible lightning.
Very intense shower of snow, often of short duration, that greatly restricts visibility and produces periods of rapid snow accumulation.
The depth of new snow that has accumulated since the previous day or since the previous observation.
Provides the public with information concerning the status of existing warnings.
In marine usage, winds 48 knots (55 mph) or greater.
A rise of the sea level alone the shore that builds up as a storm (usually a hurricane) moves over water. It is a result of the winds of the storm and low atmospheric pressures.
the path that a low pressure area follows.
A marine wind warning for sustained winds greater of 48 knots (55 mph) or more from a non-tropical system.
Measured relative to a moving thunderstorm, usually referring to winds, wind shear, or helicity.
Referring to weather systems with sizes on the order of individual thunderstorms. See synoptic scale, mesoscale.
Thunderstorm winds most often found with the gust front. They originate from downdrafts and can cause damage which occurs in a "straight line", as opposed to tornadic wind damage which has circular characteristics.
Low-level clouds, existing in a relatively flat layer but having individual elements. Elements often are arranged in rows, bands, or waves.
The branch of the jet stream that is found in the lower latitudes.
A low pressure system that develops in subtropical waters (north of 20 north degrees latitude) and initially has non-tropical features (see table below for a list of tropical features) but does have some element of a tropical cyclone's cloud structure (located close to the center rather than away from the center of circulation).
A severe thunderstorm whose updrafts and downdrafts are in near balance allowing the storm to maintain itself for several hours. Supercells often produce large hail and tornadoes.