WEATHER Flashcards
- What type of weather is associated with warm fronts?
Embedded thunderstorms. I AM GOING TO GET IMBEDDED WITH THIS WARM FRONT BECAUSE IT IS SLOW MOVING.
- What type of weather is typically associated with fast moving Cold Fronts?
Squall Lines along the the leading edge.
- Are Warm fronts typically slow moving or fast moving?
Slow moving 10-25mph. I AM GOING TO GET EMBEDDED WITH THIS WARM FRONT BECAUSE IT IS SLOW MOVING.
- Are Cold fronts typically slow moving or fast moving?
Fast 25 -30 mph. GETS COLD FAST
During passage and approaching a warm front
- Poor visibility but improves with variable winds
- Temperature rises steadily
- Slight rise in barometric pressure
- Stratocumulus clouds and rain showers
COLD FRONT
Occurs when a mass of cold dense stable air replaces a warm mass of air. Typically rapid moving 25-30mph with extreme fronts moving up to 60mph. The rapidly ascending air causes the temperature to decrease suddenly, forcing the creation of clouds. The slope is typically characterized as being step which forces air to rise rapidly creating cumulonimbus clouds and dangerous weather.
PRIOR TO THE PASSAGE OF A TYPICAL COLD FRONT
Prior to the passage of a typical cold front,
cirriform or towering cumulus clouds are present, and cumulonimbus clouds are possible.
Rain showers and haze are possible due to the rapid development of clouds.
The wind from the south- southwest helps to replace the warm temperatures with the relative colder air.
A high dew point and falling barometric pressure are indicative of imminent cold front passage.
WARM FRONT
Typically happens when a warm body or mass of air replaces a colder air mass. There characterized by their slow movement typically 10-25 mph. The slope of the advancing front is slow and gradual. They typically have saturated humid air. As the warm air rises the temperature drops and condensation occurs.
Prior to passage cirriform or stratiform clouds along with fog can be expected.
As the cold front passes,
As the cold front passes, towering cumulus or cumulonimbus clouds continue to dominate the sky. Depending on the intensity of the cold front, heavy rain showers form and might be accompanied by lightning, thunder, and/or hail. More severe cold fronts can also produce tornadoes. During cold front passage, the visibility is poor, with winds variable and gusty, and the temperature and dew point drop rapidly. A quickly falling barometric pressure bottoms out during frontal passage, then begins a gradual increase.
AFTER COLD FRONT PASSAGE
After frontal passage, the towering cumulus and cumulonimbus clouds begin to dissipate to cumulus clouds with a corresponding decrease in the precipitation. Good visibility eventually prevails with the winds from the west-northwest. Temperatures remain cooler and the barometric pressure continues to rise.
FAST MOVING COLD FRONTS
Fast-moving cold fronts are pushed by intense pressure systems far behind the actual front. The friction between the ground and the cold front retards the movement of the front and creates a steeper frontal surface. This results in a very narrow band of weather, concentrated along the leading edge of the front. If the warm air being overtaken by the cold front is relatively stable, overcast skies and rain may occur for some distance ahead of the front. If the warm air is unstable, scattered thunderstorms and rain showers may form. A continuous line of thunderstorms, or squall line, may form along or ahead of the front. Squall lines present a serious hazard to pilots as squall type thunderstorms are intense and move quickly. Behind a fast-moving cold front, the skies usually clear rapidly and the front leaves behind gusty, turbulent winds and colder temperatures.
WARM FRONT ABBREVIATED
Whereas warm fronts bring low ceilings, poor visibility, and rain,
COLD FRONT ABBREVIATED
cold fronts bring sudden storms, gusty winds, turbulence, and sometimes hail or tornadoes.
Cold fronts are fast approaching with little or no warning, and they make a complete weather change in just a few hours. The weather clears rapidly after passage and drier air with unlimited visibilities prevail. Warm fronts, on the other hand, provide advance warning of their approach and can take days to pass through a region.
A HIWAS en route radio facility:
Is High Altitude Inflight Watch Advisory Service and is capable of two-way communications.
Is Hazardous Inflight Weather Advisory Service and is capable of only one-way communication.
Is High Altitude Inflight Watch Advisory Service and is capable of only one-way communication.
Is Hazardous Inflight Weather Advisory Service and is capable of two-way communication.
Is Hazardous Inflight Weather Advisory Service and is capable of only one-way communication.
ROTATION LOW PRESSURE NORTHERN HEMISPHERE
COUNTER CLOCKWISE, INWARD TOWARD CENTER OF LOW AND UPWARD
