What are SFC winds?
Surface to 3km Layer (SFC-3km) – This layer has been used for many years to estimate the inflow layer of thunderstorms. The transition from nonsupercell to supercell thunderstorms occurs as the 0-6 km bulk wind difference increases from roughly 25 kt to 40 kt, with larger values favoring supercells.
What does wind ESE mean?
112.5° — east-southeast wind (ESE)
What does KFT stand for in weather?
KFT is a kilofoot. In aeronautics and meteorology it is used to describe altitudes.
How do I cancel SIGMET?
If, during the validity period of a SIGMET, the phenomenon for which the SIGMET was issued is no longer occurring or is no longer expected, the SIGMET shall be cancelled by issuing a SIGMET with the abbreviation CNL.
What is PIREPs aviation?
A Pilot Report or PIREP is a report of the actual weather conditions as encountered by an aircraft in flight. Traditionally, these reports are transmitted by radio to an appropriate ground station for dissemination but, when necessary, they can be made by telephone after landing.
How do you read weather highs and lows?
The forecast high is the highest temperature expected to occur that day, which in most cases is in the afternoon. The forecast low is the lowest temperature expected to occur during the next overnight period and on the vast majority of days will occur around daybreak the following morning.
How do you read weather percentages in rain?
What Does the Percentage of Rain Mean? According to a viral take on the internet, the percentage of rain doesn’t predict the chances of rain. Instead, it means a certain percentage of the forecasted area will definitely see rain—so if you see a 40% chance, it means 40% of the forecasted area will see rainfall.
What is NNW wind?
NNW = North-Northwest (327-348 degrees) VAR = Variable wind direction. CLM = Calm winds (speed = 0 knots)
What does reflectivity mean in weather?
Precipitation intensity is measured by a ground-based radar that bounces radar waves off of precipitation. “Reflectivity” is the amount of transmitted power returned to the radar receiver after hitting precipitation, compared to a reference power density at a distance of 1 meter from the radar antenna.
What is a tornado called before it hits the ground?
If it does not reach the ground, then it is called a funnel cloud. If it does reach the ground, it’s a tornado. Debris and dust are kicked up where the narrow end of the funnel touches the ground. Tornadoes, also called twisters, are columns of air rotating dangerously fast.
What does SFC stand for in weather reports?
SFC stands for Surface Wind Speed (weather reports)
What are the abbreviations for Weather Prediction Center?
Numerical Forecast Models; CMC: Canadian Meteorological Centre: ECMWF: European Centre for Medium-Range Weather Forecasts: GEM: Global Environment Multiscale (CMC’s short-range model) GFDL: Geophysical Fluid Dynamics Laboratory’s Hurricane Model: GFS: Global Forecast System (formerly known as the AVN and MRF) MM5
What does nohrsc stand for in weather category?
A NOHRSC program that uses satellite data to generate areal extent of snow cover data over large areas of the western United States. 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.