nocturnal boundary layer"The cool layer of air adjacent to the ground that forms at night.
Nocturnal - Related to nighttime, or occurring at night.
Nowcast - A short-term weather forecast, generally out to six hours or less.
NSSFC - National Severe Storms Forecast Center, in Kansas City MO; now known as SPC.
Nocturnal Radiation - see effective terrestrial radiation
Non-Coherent Radar - a conventional radar in which the phase of the transmitted radiation is not known
Northern Lights - see Aurora Borealis ...
NOCTURNAL THUNDERSTORMS
Thunderstorms which develop after sunset. They are often associated with the strengthening of the low level jet and are most common over the Plains states.
Nocturnal Inversion see radiational inversion.
Nocturnal Jet This wind speed maximum occurs just above the nocturnal inversion at night. It is typically found in the south central United States during the late spring and summer months.
Nocturnal Inversion
Used interchangably with Radiational Inversion; a temperature inversion that develops during the night as a result of radiational cooling of the surface.
Nocturnal - Related to nighttime, or occurring at night.
Normal - The long-term average value of a meteorological element for a certain area. For example, "temperatures are normal for this time of year" Usually averaged over 30 years.
Nocturnal Cooling
Lowering of air temperature caused by nocturnal radiation.
Norther
A strong, cold northerly wind in various parts of the Northern Hemisphere.
NOCTURNAL- A weather feature that occurs at night (i.e. nocturnal inversion)
NOGAPS- Forecast model. Developed by the US Navy to compare with the GFS ...
Nocturnal inversion See Radiation inversion.
O
Offshore breeze A breeze that blows from the land out over the water. Opposite of an onshore breeze.
Nocturnal - Related to nighttime, or occurring at night.
Nowcast - A short-term weather forecast, generally out to six hours or less.
Land Breeze A nocturnal coastal breeze that blows from land to sea. In the evening the water may be warmer than the land, causing pressure differences. The land breeze is the flow of air from land to sea equalizing these pressure differences.
NocturnalRelated to nighttime; occurring at night.Nocturnal InversionUsed interchangably with Radiational Inversion; a temperature inversion that develops during the night as a result of radiational cooling of the surface.
Used interchangably with Nocturnal Inversion; a temperature inversion that develops during the night as a result of radiational cooling of the surface.
While tornadoes are invisible at night, some nocturnal tornadoes have been observed glowing diffusely due to lightning activity. Verified observations by Hall and others suggest a cellular structure inside tornadoes.
Effective terrestrial radiation (nocturnal radiation) The difference between the outgoing infrared (longwave) terrestrial radiation of the Earth's surface and the downward infrared counter-radiation from the atmosphere.
Radiation fog A ground-level fog formed by nocturnal radiational cooling of a humid air layer so that its relative humidity approaches 100 %; sometimes called ground fog.
Radio waves Long-wavelength, low-frequency electromagnetic waves.
This enhances the warm, moist air ahead of an upper level front-jet system. This is common over the Plains states at night during the warm season (spring and summer). Another type of a LLJ is called a "Nocturnal Jet". See Nocturnal Jet.
A warm slope surface, as produced by daytime heating, generates anabatic or upslope winds, whereas a cool surface, as from nocturnal cooling, generates katabatic or downslope winds.
Radiation inversion An increase in temperature with height due to radiational cooling of the earth's surface. Also called a nocturnal inversion.
An increase in temperature with height due to radiational cooling of the earth's surface. Also called a nocturnal inversion.
Radiative cooling(1) ...
Examples of inversions include those due to anticyclonic subsidence; cooling land by night (nocturnal inversions); and sea-breeze inversions, where cooler sea air under-cuts warmer land air.
 See also: Surface, Air, Temperature, Weather, Cloud
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