Meteorology Practice Tests
Free, AI-generated Meteorology practice tests for Science Olympiad. Choose Invitational, Regional, State, or National difficulty, import past exam PDFs, and track your scores over time.
Meteorology runs in Division B for the 2027 season. 2027 rules focus: Severe Storms.
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Meteorology Sample Practice Questions
1. A tornado WARNING means:
- Conditions are favorable for tornadoes
- A tornado has been sighted or is indicated on radar
- A tornado watch has expired
- Tornadoes are possible next week
Show answer and explanation
Answer: A tornado has been sighted or is indicated on radar
Watch = favorable conditions, be prepared (broad area, longer window). Warning = happening or imminent, take shelter NOW (small area, short window). The most-tested distinction in severe weather.
2. The rotating updraft at the heart of a supercell thunderstorm is the:
- Mesoscale convective complex
- Mesocyclone
- Microburst
- Derecho
Show answer and explanation
Answer: Mesocyclone
Wind shear tilts and rolls horizontal vorticity into the vertical, spinning the updraft. A wall cloud may lower from it before a tornado descends.
3. Sustained winds of 115 mph make a hurricane which Saffir-Simpson category?
- Category 2
- Category 3
- Category 4
- Category 5
Show answer and explanation
Answer: Category 3
Categories by sustained wind: 1 (74-95), 2 (96-110), 3 (111-129), 4 (130-156), 5 (157+ mph). Category 3 and above are "major" hurricanes - and 115 mph sits in Category 3.
4. You count 10 seconds between a lightning flash and its thunder. About how far away was the strike?
- 1 mile
- 2 miles
- 5 miles
- 10 miles
Show answer and explanation
Answer: 2 miles
Sound travels about 1 mile per 5 seconds (1 km per 3 seconds): 10 ÷ 5 = 2 miles. If you hear thunder, you are within striking distance - go indoors.
5. Enhanced Fujita (EF) ratings are assigned based on:
- Measured wind speed
- Doppler radar velocity
- Observed damage
- Barometric pressure
Show answer and explanation
Answer: Observed damage
The EF scale rates tornadoes EF0-EF5 by the damage surveyors observe, which implies wind speed. Radar and pressure are useful but do not set the rating.
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What Meteorology Tests Cover
Earth's atmosphere and weather for the 2027 Division B season, with a focus on Severe Weather and Storms and interpreting meteorological data.
Event focus 2027 (severe weather and storms)
- Division B event; 2027 topic = severe weather: factors that contribute to, cause, and influence severe weather and storms
- Interpretation of meteorological data, graphs, maps, charts, tables, and images is emphasized
Atmosphere basics
- Composition: ~78% N₂, ~21% O₂, ~1% argon + trace gases (CO₂, water vapor variable)
- Layers from ground up: troposphere (weather happens here, temperature decreases with height), stratosphere (ozone layer, temp increases), mesosphere, thermosphere
- Pressure and density decrease exponentially with altitude; standard sea level pressure = 1013.25 mb / 29.92 inHg
- Lapse rate ~6.5 °C per km in the troposphere
Thunderstorms
- Need: moisture, instability (warm air rises), lifting mechanism (front, convection, orographic)
- Stages: cumulus (updrafts build) → mature (updrafts + downdrafts, heaviest rain/hail, lightning) → dissipating (downdraft dominates)
- Lightning: charge separation from ice colliding in updrafts (graupel vs. ice crystals); negative cloud base induces positive charge at ground; return stroke = bright flash
- Thunder: rapid heating/expansion of air; ~3 seconds per kilometer (5 s per mile) from flash to bang
- Derecho: widespread, long-lived straight-line windstorm from a bow echo
Tornadoes
- Form mainly from supercell thunderstorms with a rotating updraft (mesocyclone)
- Wall cloud lowers; tornado descends; wind speeds up to >300 mph in strongest
- Enhanced Fujita (EF) scale rates damage EF0 (weak) to EF5 (incredible); rated by DAMAGE, not measured wind
- Tornado Alley: central US (warm moist Gulf air meets dry air from Rockies + wind shear)
- US averages ~1,200 tornadoes/year; peak season spring in the South, late spring/summer on Plains
Hurricanes (tropical cyclones)
- Need: ocean ≥ ~26.5 °C, low vertical wind shear, Coriolis effect (none within ~5° of equator), pre-existing disturbance, high humidity through depth
- Structure: eye (calm, clear, sinking air), eyewall (strongest winds), spiral rain bands
- Saffir-Simpson categories 1-5 by sustained WIND speed (74-95, 96-110, 111-129, 130-156, 157+ mph); category 3+ = major
- Biggest killer usually storm surge + freshwater flooding, not wind
- Northern hemisphere: counterclockwise rotation; rotate clockwise south of the equator; move westward with trade winds then recurve poleward
- Names: alternating male/female lists, retired for deadly storms
Winter storms and other severe weather
- Blizzards: snow + sustained winds ≥ 35 mph + visibility ≤ ¼ mile ≥ 3 hours (falling OR blowing snow)
- Lake-effect snow: cold air over warm unfrozen lakes picks up moisture, dumps downwind
- Ice storms: freezing rain (rain freezing on contact at/below freezing surface)
- Hail: ice pellets cycled by thunderstorm updrafts (more cycles = larger); largest hail with strongest updrafts
- Flash floods: #2 weather killer; 6 inches of moving water can knock you down, 12 inches can float a car
Data interpretation (emphasized 2027)
- Weather maps: isobars (close together = strong pressure gradient = high winds); Highs = clockwise/ sinking/ fair; Lows = counterclockwise/ rising/ stormy
- Fronts: cold (blue triangles, steep, fast, thunderstorms), warm (red semicircles, gentle, steady rain), occluded (purple, cold catches warm), stationary (alternating symbols, stalled)
- Station models: temperature, dew point, wind barbs (barb = 10 knots), pressure, cloud cover, current weather symbols
- Radar: reflectivity (dBZ) for precipitation intensity; hook echo = possible tornado; satellite IR shows cloud-top temperature
- Instruments: barometer (pressure), anemometer (wind speed), wind vane (direction), hygrometer/psychrometer (humidity), rain/snow gauge, thermometer, radiosonde (weather balloon)
Watch vs warning (classic test item)
- Watch = conditions are favorable, be prepared (issued for broad area, longer window)
- Warning = event occurring or imminent, take action NOW (smaller area, short window)
- Safety: lowest floor, interior room away from windows for tornado; evacuate storm surge zones for hurricane
Common mistakes
- Mixing up watch vs. warning
- Rating hurricanes by pressure or surge instead of wind speed
- Pointing cold front triangles opposite the direction of travel (they point the way the front moves)
- Assuming the eye is the most dangerous part of a hurricane (eyewall is)
- Measuring lightning distance with the wrong seconds-to-distance conversion