Forecasting and Operational Meteorology Flashcards
7 cards from real CCM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Forecasting and Operational Meteorology flashcards as text
Which type of fog forms when warm, moist air advects over a cooler surface, cooling the air below its dew point?
Answer: Advection fog
Advection fog forms when warm, moist air moves horizontally over a cooler surface and is chilled to its dew point, commonly forming over coastal areas.
A CCM providing forensic weather consulting reviews surface observations showing a dew point depression of less than 2°C and light winds at sunrise. What condition is most likely?
Answer: Dense fog or low stratus
A near-zero dew point depression means the air temperature is very close to saturation, and calm winds at sunrise favor fog or low stratus formation.
The Lifted Index (LI) is calculated by comparing the temperature of a parcel lifted to 500 hPa against the environmental temperature at that level. A strongly negative LI (e.g., -6 or less) indicates:
Answer: Extreme atmospheric instability favorable for severe thunderstorms
A strongly negative Lifted Index means the lifted parcel is much warmer than the environment at 500 hPa, indicating extreme instability and severe thunderstorm potential.
Which parameter on a Skew-T Log-P diagram represents the amount of energy a convective updraft must overcome before free convective ascent begins?
Answer: Convective Inhibition (CIN)
CIN (Convective Inhibition) is the negative buoyancy energy a parcel must overcome to reach the Level of Free Convection (LFC) and initiate free ascent.
A meteorologist notices a 'dry slot' wrapping around the center of a developing cyclone in satellite water vapor imagery. This feature is associated with:
Answer: An intrusion of stratospheric dry air descending into the mid-troposphere during cyclone intensification
The dry slot in water vapor imagery marks a region of descending, dry stratospheric air that wraps into the cyclone, often coinciding with the most intense surface winds.
Which forecast technique compares current synoptic patterns with a historical database to identify past situations that produced similar atmospheric states, then uses those outcomes to inform the forecast?
Answer: Analog method
The analog method searches historical records for past weather patterns that closely resemble the current situation and uses those past outcomes to guide the forecast.
When a supercell thunderstorm produces a hook echo on radar reflectivity, the hook appendage typically indicates:
Answer: A rotating mesocyclone wrapping precipitation around its circulation, often associated with tornado potential
The hook echo forms as the supercell's rotating mesocyclone wraps rain and hail around its circulation, making it a key indicator of tornado potential.