← Back to catalogue
Research draft

stratus

vr.tr.stratus · XCT.STA

Let an agent explain stratus clouds and related layered cloud types, describe their formation and weather significance, support cloud identification, and support learning in meteorology.

Thing Registry Cross-cutting context

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain stratus clouds and related layered cloud types, describe their formation and weather significance, support cloud identification, and support learning in meteorology.

A low-level cloud genus forming a uniform grey layer with a fairly even base, often producing drizzle, snow grains or fog when it reaches the ground, with species such as stratus nebulosus and stratus fractus and related layered clouds including altostratus at middle levels and nimbostratus, the thick rain-bearing layer cloud; stratus clouds form when moist air is cooled near the surface or lifted gently, and are classified in the international cloud atlas.

What it is for: Uniform low layer cloud.

It can be explain stratus and related types; describe formation and weather; support identification; support learning.

Distinguishing features

Layered form

Low base

Even appearance

Drizzle-producing

What it looks like

A featureless grey layer, sometimes ragged, often low.

How it is recognised

Uniform low grey layer

Drizzle or fog possible

Stratocumulus has lumpy elements; cumulus is heaped; cirrostratus is high and thin

Related models

is a kind of - category

low-level cloud

is related to - precipitation from layer clouds

raindrop

is related to - storms with layered cloud

northeaster

is related to - another sky phenomenon entry

aurora

In practice

Families and kinds

stratus nebulosus

stratus fractus

altostratus

nimbostratus

stratus-related fog

Standards and regulation

International Cloud Atlas classification

Aviation weather reporting codes

No regulation of the phenomenon

Failure modes and hazards

Confusing stratus with stratocumulus or fog

Low visibility hazards for aviation and driving

Misreading cloud reports

Also called

altostratus undulatus cloudaltostratusnimbostratusstratus fractusstratus nebulosusNimbostratus virga

Where this came from

wikidata · CC0 1.0

Also registered as vr.tr.stratus

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What stratus is.

Meteorology.

Formation

Formation.

Formation

Formation.

  1. How do stratus clouds form from surface cooling or gentle lifting, and how do they relate to fog? definition
  2. Which entry fits cloud formation generally? action

Types

Species and related clouds.

Types

Types.

  1. How do stratus nebulosus, stratus fractus, altostratus and nimbostratus differ? definition
  2. Which entry fits a specific cloud type? action
Identify Identification and weather.

Practice.

Identify

Identifying stratus.

Identify

Identification.

  1. How can stratus be distinguished from stratocumulus, fog and other layer clouds in the sky? action
  2. Which entry fits cloud identification? action

Weather

Weather significance.

Weather

Weather.

  1. What weather do stratus and nimbostratus indicate, and how are they used in forecasting? provenance
  2. Which entry fits weather forecasting? action
Apply Aviation and observation.

Context.

Aviation

Aviation.

Aviation

Aviation.

  1. How do stratus and low ceilings affect aviation, and how are they reported? provenance
  2. Is a low visibility hazard present now? boundary

Observe

Observation networks.

Observe

Observation.

  1. How are clouds observed and classified by weather services and citizen observers? provenance
  2. Which entry fits weather observation? action
Learn History and teaching.

Education.

History

History.

History

History.

  1. How did cloud classification develop from Howard to the international atlas? provenance
  2. Which references are standard? provenance

Teach

Teaching.

Teach

Teaching.

  1. How can cloud types be taught with observation exercises? action
  2. Which misconceptions arise? provenance

What the second pass must settle

  • Should altostratus and nimbostratus be separate entries?
  • How should cloud atlas resources be linked?
  • How should aviation weather be linked?