Outdoor Skills

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  Weather

  5 min

  Read the sky for coming rain

  Clouds move faster than fronts. You have hours of warning if you look up.

  1. 1High, wispy cirrus followed by lowering, thickening clouds = warm front, rain in 12-24 hours.
  2. 2Towering cumulus building vertically in the afternoon = thunderstorms within hours.
  3. 3A halo around sun or moon = high moisture aloft, weather worsening in 24-36 hours.
  4. 4Sudden wind shift and dropping temperature = cold front, fast squall likely.
  5. 5Sharp, distant horizon = dry air. Hazy horizon = moist air, storms more likely.

  Tip: Red sky at night reflects dry air to the west — clearing. Red sky in morning reflects moisture arriving — deteriorating.

  NatureMentor — Cloud Types & Weather

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  Weather

  10 min

  Read cloud formations to forecast weather

  Clouds give 6–24 hours of advance warning about incoming weather when you know what to look for.

  1. 1High wispy cirrus 'mare's tails' invading a clear sky mean a warm front is 12–24 hours out — expect rain within a day.
  2. 2Cirrus thickening to a smooth cirrostratus veil (halo around sun or moon) confirms front is closer — often within 12 hours.
  3. 3Middle-level altostratus turning to low nimbostratus with a lowering, darkening ceiling means active precipitation is beginning.
  4. 4Tall cumulus towering into anvil-topped cumulonimbus in warm afternoons means thunderstorms — get off ridges and out of exposed water within an hour.
  5. 5Clearing to fair-weather cumulus with flat bases and blue sky between means the system has passed.

  Tip: Watch cloud motion, not just shape. Fast-moving clouds mean strong upper winds and rapidly changing weather.

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  Weather

  5 min

  Reduce your lightning risk in the field

  You cannot make yourself lightning-proof, but you can dramatically reduce the odds of being struck.

  1. 1The moment you hear thunder, start moving off exposed terrain — ridges, summits, open meadows, and shorelines.
  2. 2Head to lower ground, ideally uniform terrain in a stand of shorter trees of similar height.
  3. 3Avoid isolated tall objects (single trees, poles, boulders taller than the surroundings).
  4. 4If you cannot reach shelter, spread your group so any strike affects only one person, and squat on the balls of your feet on a foam pad — never lie down.
  5. 5Wait 30 minutes after the last thunder before returning to exposed terrain.

  Warning: Metal frame packs, trekking poles, and wet ropes conduct current. Set them aside 30 feet from you during a storm.

• 

  Weather

  10 min

  Read wind and pressure changes for incoming weather

  Even without a barometer, your body and the landscape give clear cues that pressure is dropping and weather is turning.

  1. 1A sudden shift in wind direction — especially clockwise in the Northern Hemisphere — often signals an approaching front.
  2. 2Rapidly rising wind speed with dropping temperature is a classic cold front sign — squalls or thunderstorms likely within hours.
  3. 3Smoke that used to rise straight now flattens and settles — atmospheric pressure has dropped, weather is deteriorating.
  4. 4Birds fly lower, insects bite more aggressively, and joint pain worsens as pressure falls — take these as your body's barometer.
  5. 5Once wind slackens, temperature stabilizes, and smoke rises straight up again, the weather is settling.

  Tip: The old sailors' rhyme holds up: 'Red sky at night, sailors' delight; red sky in morning, sailors take warning.' A red morning sky often means a system is approaching from the west.

• 

  Weather

  5 min

  Predict overnight frost

  Frost catches campers by surprise. A few end-of-day cues warn you to insulate harder before dark.

  1. 1Check the sky at sunset — a clear sky lets ground heat radiate to space; frost is likely if temperatures are near freezing and skies stay clear all night.
  2. 2Note the wind — dead calm plus clear skies plus low humidity is the classic frost recipe.
  3. 3Camp higher on a slope rather than in a valley or hollow — cold air pools in low spots and frost hits them first.
  4. 4If temperature drops below about 40°F (4°C) at sunset with clear skies and calm wind, prepare for frost by dawn.
  5. 5Cover any exposed water containers and stow water bottles inside your sleeping bag so they don't freeze.

  Tip: Look for spider webs beaded with dew at sunset — visible dew often means the air is cooling toward the dew point and frost is possible if temperatures keep falling.

Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations (fire, fishing, foraging, snaring) before you rely on any of these skills in the field.