Approaching (severe levels) - A thunderstorm which contains winds of 35 to 49 knots (40 to 57 mph), or hail 1/2 inch or larger but less than 3/4 inch in diameter.
Approaching Severe Levels A thunderstorm which contains winds of 40 to 57 mph (35 to 49 kts), or hail 1/2" or larger but less than 3/4" in diameter. See Severe Thunderstorm.
Approaching thunderstorm
Aeromancy (from Greek aero, "air", and manteia, "divination") is divination conducted by interpreting atmospheric conditions.
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APPROACHING - Term used to describe an intensifying thunderstorm based on warning and intensity thresholds. Commonly used as APPROACHING STRONG (or SEVERE) limits.
Flow approaching a mountain barrier that is too weak or too stable to be carried over the barrier.
Blowing
A descriptor used to amplify observed weather phenomena whenever the phenomena are raised to a height of 6 feet or more above the ground ...
See approaching (severe).
Severe Thunderstorm Warning (SVR): This is issued when either a severe thunderstorm is indicated by the WSR-88D radar or a spotter reports a thunderstorm producing hail 3/4 inch or larger in diameter and/or winds ...
The second storm is approaching, and the cloud lowering continues to slope into the precipitation.
Pre-Hurricane Squall LineIt is often the first serious indication that a hurricane is approaching. It is a generally a straight line and resembles a squall-line that occurs with a mid-latitude cold front.
The cold air, trapped upwind of the barrier alters the effective terrain configuration of the barrier to larger-scale approaching flows.Cold Air Damming (CAD)The phenomenon in which a low-level cold air mass is trapped topographically.
They will be initiated when and if flash flood watches are posted in the United States because of an approaching system.
Weather stick Made of birch and attributed to northeast Native American tribes, the stick is said to rise indicating fair weather and to drop when inclement weather is approaching. The movement of the tip appears to track the relative humidity.
The cold air often either accumulates on a plateau or other elevated terrain, or is part of an extensive cold air mass approaching a mountain range as a cold front.
The terms approaching, slight risk, moderate risk, and high risk are used to describe severe thunderstorm potential.
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BLOBelowBlocked FlowFlow approaching a mountain barrier that is too weak or too stable to be carried over the barrier.
A relatively strong high pressure ridge will deflect or weaken approaching low pressure systems, diminishing their potential to deliver any significant precipitation.
An approaching cold front or trough. The ideal conditions for severe thunderstorms, and their progeny of flash flooding, large hail, destructive wind gusts, and even tornadoes.
The region upstream from a wind speed maximum in a jetstream (jet max), in which air is approaching (entering) the region of maximum winds, and therefore is accelerating.
Entrance Region - The region upstream from a wind speed maximum in a jet stream (jet max), in which air is approaching (entering) the region of maximum winds, and therefore is accelerating.
spring - The season of the year composing the transition period from winter to summer; the vernal season, during which the sun is approaching the summer solstice.
IMMINENT STALL - A flight condition where the aircraft is approaching a stall but is not allowed to fully stall.
INDICATED AIRSPEED - The speed of your aircraft as indicated on the airspeed indicator.
Most prominent beneath the rain-free base and on the leading edge of an approaching thunderstorm. Usually marked by gusty, cool winds.
The lead time that a populated coastal area must have to safely relocate all residents of vulnerable areas from an approaching hurricane.
Air Quality Alert - Issued during times (usually on hot, summer days) when ground-level ozone and/or fine particle concentrations unexpectedly reach, or are approaching, unhealthy levels in your area based on monitored values.
Convective Outlook (sometimes called AC) - A forecast containing the area(s) of expected thunderstorm occurrence and expected severity over the contiguous United States, issued several times daily by the SPC. The terms approaching, slight risk, ...
first gust—The leading edge of the spreading downdraft, plow wind, from an approaching thunderstorm.
flow line—A streamline.
*Severe Thunderstorm - A thunderstorm which produces tornadoes, hail 0.75 inches or more in diameter, or winds of 50 knots (58 mph) or more. Structural wind damage may imply the occurrence of a severe thunderstorm. See approaching (severe).
SEVERE THUNDERSTORM: 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.
Christian Doppler, an Austrian physicist, who in 1842 explained why the whistle of an approaching train had a higher pitch than the same whistle when the train was going away. Related terms: NEXRAD and Dave's Dictionary ...
Using the Doppler effect, it measures the velocity of particles. Named for J. Christian Doppler, an Austrian physicist, who in 1842 explained why the whistle of an approaching train had a higher pitch than the same whistle when the train was going ...
trees, neighbour's bushes, and of course, the house (and adjacent buildings) usually are the largest objects, and cannot be realistically circumvented. Most hobby observers cannot meet the latter (4 times) requirement, but something approaching the ...
collection efficiencyThe fraction of droplets approaching a surface that actually deposit on that surface.condensationThe process by which water changes phase from a vapor to a liquid.
 See also: Air, Precipitation, Cloud, Weather, Front
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