Subj : Wx Terms (S)(1)
To : All
From : Daryl Stout
Date : Thu Jul 20 2017 12:05 am
S
1) South
or
2) Snow
S-Band Radar
These were in use as network radars in the National Weather Service prior
to the installation of the WSR 88-D radars. They were 10-centimeter
wavelength radars.
S/W
Shortwave - a disturbance in the mid or upper part of the atmosphere which
induces upward motion ahead of it. If other conditions are favorable, the
upward motion can contribute to thunderstorm development ahead of a
shortwave.
S/WV
Shortwave - a disturbance in the mid or upper part of the atmosphere which
induces upward motion ahead of it. If other conditions are favorable, the
upward motion can contribute to thunderstorm development ahead of a
shortwave.
SafetyNET
Inmarsat-C SafetyNET is an internationally adopted, automated satellite
system for promulgating weather forecasts and warnings, marine
navigational warnings and other safety related information to all types
vessels and is part of the Global Maritime Distress and Safety System
(GMDSS).
Saffir-Simpson Scale
This scale was developed in an effort to estimate the possible damage a
hurricane's sustained winds and storm surge could do to a coastal area.
The scale of numbers are based on actual conditions at some time during
the life of the storm. As the hurricane intensifies or weakens, the scale
number is reassessed accordingly. The following table shows the scale
broken down by category, central pressure, winds, and storm surge:
Salinity (SAL)
In oceanography, conductivity is measured and converted to salinity by
a known functional relationship between the measured electrical
conductivity of seawater temperature and pressure.
SAME
(Specific Area Message Encoding) - A tone alert system which allows NOAA
Weather Radio receivers equipped with the SAME feature to sound an alert
for only certain weather conditions or within a limited geographic area
such as a county.
SAMEX
Storm and Mesoscale Ensemble Experiment
Sampling Frequency
The rate at which sensor data is read or sampled.
Sandstorm
Particles of sand carried aloft by strong wind. The sand particles are
mostly confined to the lowest ten feet, and rarely rise more than fifty
feet above the ground.
Santa Ana Wind
In southern California, a weather condition in which strong, hot,
dust-bearing winds descend to the Pacific Coast around Los Angeles from
inland desert regions.
Sastrugi
Ridges of snow formed on a snow field by the action of the wind.
SAT
1. Satellite (imagery)
2. Saturday
Satellite Hydrology Program
A NOHRSC program that uses satellite data to generate areal extent of
snow cover data over large areas of the western United States.
SATL
Satellite
Saturation Vapor Pressure
The vapor pressure of a system, at a given temperature, wherein the
vapor of a substance is in equilibrium with a plane surface of that
substance's pure liquid or solid phase.
SAWRS
Supplementary Aviation Reporting Station - the SAWRS program addresses
the concerns of users who depend on weather observations for air
operations. If the cooperator is collocated with a commissioned
automated system, they ensure continuity during outage periods of the
automated system. The requirement for a SAWRS arises from the FAA
validated need for observations to satisfy FAR 121 or 135 operations
or for the safe conduct of other aircraft.
SBCAPE
Surface Based CAPE; CAPE calculated using a Surface based parcel.
SBND
Southbound
SBSD
Subside
SC
Stratocumulus
SCA
Small Craft Advisory
Scattered
Precipitation descriptor: Areal coverage of convective weather
affecting 30 percent to 50 percent of a forecast zone (s). Sky
coverage descriptor : A sky coverage of 1/8 through 4/8.
In U.S. weather observing procedures, this is reported with the
contraction SCT.
Scattering
The process in which a beam of light is diffused or deflected by
collisions with particles suspended in the atmosphere.
SCT
Scattered
Scud
Small, ragged, low cloud fragments that are unattached to a larger
cloud base and often seen with and behind cold fronts and thunderstorm
gust fronts. Such clouds generally are associated with cool moist air,
such as thunderstorm outflow.
SE
Southeast
Sea Breeze
A thermally produced wind blowing during the day from a cool ocean
surface onto the adjoining warm land, caused by the difference in the
rates of heating of the surfaces of the ocean and of the land.
Sea Breeze Convergence Zone
The zone at the leading edge of a sea breeze where winds converge. The
incoming air rises in this zone, often producing convective clouds.
Sea Breeze Front
The leading edge of a sea breeze, whose passage is often accompanied
by showers, a wind shift, or a sudden drop in temperature.
Sea Fog
Common advection fog caused by transport of moist air over a cold body
of water.
Sea Ice
Any form of ice found at sea which has originated from the freezing of
sea water (sea ice does NOT include superstructure icing). Ice formed
from the freezing of the waters of the Great Lakes will be considered
the same as sea ice.
Sea Level Pressure
The sea level pressure is the atmospheric pressure at sea level at a
given location. When observed at a reporting station that is not at sea
level (nearly all stations), it is a correction of the station pressure
to sea level. This correction takes into account the standard variation
of pressure with height and the influence of temperature variations
with height on the pressure. The temperature used in the sea level
correction is a twelve hour mean, eliminating diurnal effects. Once
calculated, horizontal variations of sea level pressure may be compared
for location of high and low pressure areas and fronts.
Sea Surface Temperatures
The term refers to the mean temperature of the ocean in the upper few
meters.
Seas
The combination of both wind waves and swell. Used to describe the
combination or interaction of wind waves and swell in which the
separate components are not distinguished. This includes the case when
swell is negligible or is not considered in describing sea state.
Specifically, Seas2 = S2+W2 where S is the height of the swell and W is
the height of the wind wave. When used, Seas should be considered as
being the same as the Significant Wave Height.
Second-Day Feet
In hydrologic terms, the volume of water represented by a flow of one
cubic foot per second for 24 hours; equal to 86,400 cubic feet. This is
used extensively as a unit of runoff volume. Often abbreviated as SDF.
Secondary Ambient Air Quality Standards
Air quality standards designed to protect human welfare, including the
effects on vegetation and fauna, visibility and structures.
---
� Synchronet � The Thunderbolt BBS - wx1der.dyndns.org
