S-130 Weather Observation 4

Question 1

What is a 'Red Flag Warning' and what conditions typically trigger it?

Accepted Answer

A National Weather Service alert for critical fire weather combining low humidity, high winds, and dry fuels

Answer

Red Flag Warnings are issued by the National Weather Service when a combination of low relative humidity, strong winds, and dry fuels create extreme fire danger.

Question 2

Which topographic feature causes a 'saddle' or 'notch' effect that dramatically accelerates wind speed through it?

Accepted Answer

A col or gap between two peaks

Answer

Cols, saddles, and notches between terrain features act as funnels that compress and accelerate wind, creating locally extreme and dangerous conditions for firefighters.

Question 3

A fire weather forecast states 'winds become erratic after 1400.' What should incident commanders do with this information?

Accepted Answer

Ensure all crews are in safe zones or have escape routes identified before 1400

Answer

Predicted erratic winds are a critical trigger: all crews must be in defensible positions with clear escape routes before the forecasted time.

Question 4

What is meant by 'fuel moisture recovery' during nighttime hours?

Accepted Answer

The reabsorption of atmospheric moisture by dead fuels as temperature drops and humidity rises at night

Answer

Overnight, dropping temperatures and rising relative humidity allow dead fine fuels to absorb moisture from the air, temporarily reducing their flammability.

Question 5

What does the acronym 'RAWS' stand for in the context of fire weather data collection?

Accepted Answer

Remote Automated Weather Station

Answer

RAWS (Remote Automated Weather Stations) are unmanned weather monitoring stations that continuously collect and transmit fire-weather data from remote locations.

(S-130) Wildland Firefighting Training Certification Practice Test

(S-130) Wildland Firefighting Training Certification Practice Test

S-130 Weather Observation 4