⚡ This Month™ Instant Lesson Guide
Storm Simulator
Adjust the conditions — watch the storm respond
Grade Band
Kindergarten – Grade 1
Total Time
30 minutes
Format
Whole group, teacher-led
Big Idea
Storms have different sizes and speeds
Learning Objectives
What students will do by the end
▾
- 1Name at least two things they notice when a storm gets bigger on the screen
- 2Use the word wind and rain to describe what a storm does
- 3Point to the eye of the storm and explain that it is the calm center
Lesson Timing
Pacing at a glance
▾
0–5 min
Hook & Wonder
Show the featured image. Ask: "What do you see?"
5 min
5–20 min
Simulator Exploration
Teacher runs each preset scenario; students watch and call out observations
15 min
20–25 min
Guided Discussion
Whole-group questions from the Discussion section below
5 min
25–30 min
Exit Activity
Draw a storm and label the wind, rain, and eye
5 min
Using the Storm Simulator
Step-by-step guidance for K–1
▾
For this grade band, the teacher controls the simulator while students observe on a shared screen or projector. Students do not interact with the tool directly.
First: Click the K–1 button at the top of the simulator before you begin. This switches all the labels to simpler words — "Sky Winds" instead of "Wind Shear," and storm strength shown as stars (⭐ through ⭐⭐⭐⭐⭐) instead of category numbers.
1
Open & Set to K–1 Mode
Open the Storm Simulator in any web browser. Click the K–1 button at the top. You will see a blue aerial map, a colored badge showing storm strength, and five sliders labeled in simple terms.
2
Start with "Weak Storm"
Click the 🌧️ Weak Storm button, then press ▶️ Start Storm. Ask: "What colors do you see? What is moving?" Point out the gentle rain and small waves. Note that even though the Water Temperature is warm, the strong Sky Winds are breaking the storm apart — the storm badge will show a low number of stars.
3
Move to "Major Hurricane"
Click 🌪️ Major Hurricane and start again. Ask: "How is this different? What happened to the houses and trees?" Point out the red sky, flooding, and debris. The storm gets five stars because all the conditions are working together — warm water, calm sky winds, moist air, flat beach, and a slow storm.
4
Point out the Eye
Pause mid-animation and circle the bright white spiral center on the screen. "This is the eye — it is actually the quiet part of the storm, even though everything around it is very dangerous!"
Discussion Questions
Whole-group prompts
▾
- What did you see when the Major Hurricane hit the land? What happened to the houses and trees?
- The Weak Storm had warm water — but it stayed small. What do you think kept it from growing?
- Where did the water go when the big storm came to shore?
- The center of the storm is called the eye. Why do you think it looks different from the rest of the storm?
- If you lived near the ocean and a big storm was coming, what would you want to do to stay safe?
Key Vocabulary
Simple definitions for K–1
▾
Storm
Strong wind and rain that happens in nature. Some storms are bigger than others.
Hurricane
A very big storm that spins around like a top. It forms over warm ocean water.
Eye
The calm, clear center of a hurricane. It looks like a hole in the clouds when seen from above.
Flood
When too much water covers the land. Storms can push water from the ocean onto the shore.
Wind
Moving air. Strong winds in a hurricane can knock down trees and buildings. The simulator calls the high-up winds "Sky Winds" — when those are strong, they actually break the storm apart.
Storm Speed
How fast the storm is moving toward land. A slow storm stays longer and pushes more water onto shore. A fast storm passes by more quickly.
Standards Alignment
Select a state below to view aligned standards
▾
Grade 1
S1E1.a
Represent data in tables and/or graphs to identify and describe different types of weather and the characteristics of each type.
Grade 2
S2E3.b
Construct an explanation of the causes and effects of a change to the environment in your community.
NC Science — Kindergarten
ESS.K.1.1
Analyze and interpret data to compare changes in the environment due to weather.
NC Mathematics — Grade 1
NC.1.MD.4
Organize, represent, and interpret data with up to three categories. Ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
NYS Science — Kindergarten
K-ESS2-1
Use and share observations of local weather conditions to describe patterns over time.
K-ESS3-2
Ask questions to obtain information about the purpose of weather forecasting to prepare for, and respond to, severe weather.
NYS Mathematics — Grade 1
NY-1.MD.4
Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
Grade Band
Grades 2–3
Total Time
35–40 minutes
Format
Pairs or small groups at device
Big Idea
Storm strength is connected to ocean conditions
Learning Objectives
What students will do by the end
▾
- 1Explain the difference between a Tropical Storm and a Category 3 hurricane using data from the simulator
- 2Describe how changing sea surface temperature affects storm strength
- 3Use the vocabulary terms storm surge, category, and sea surface temperature in a written or spoken sentence
- 4Make and record a simple prediction before each scenario, then compare to the actual result
Lesson Timing
▾
0–5 min
Background Knowledge
Brief discussion: What do students already know about hurricanes?
5 min
5–10 min
Simulator Orientation
Teacher walks through controls: intensity slider, SST slider, terrain, preset scenarios
5 min
10–25 min
Partner Exploration
Students run all three scenarios and record observations in a simple T-chart
15 min
25–35 min
Debrief & Discussion
Share T-charts; connect data card numbers to real-world impacts
10 min
35–40 min
Exit Ticket
Written sentence: "If ocean water gets hotter, the storm…"
5 min
Using the Storm Simulator
Controls, scenarios, and what to watch
▾
First: Click the 2nd–3rd button at the top of the simulator. This switches labels to grade-appropriate terms like "Sea Temperature," "Upper Winds," and "Hurricane Cat 1–5."
🎛️ The Five Controls
Sea Temperature
Warm water (above 79°F) gives the storm energy. Below 79°F, no hurricane forms. The warmer the water, the stronger the storm can get.
Upper Winds
Winds high in the sky can either help or hurt a storm. Low upper winds let the storm grow tall and organized. High upper winds rip it apart — the storm gets weaker even if the water is warm.
Atmospheric Moisture
Moist air feeds the storm with more rain and energy. Dry air weakens it from the inside.
Coastal Terrain
Flat coasts let storm surge spread far inland. Hilly terrain blocks the surge sooner.
Storm Speed
Slow storms sit over the coast longer, pushing more water ashore. Fast storms cause a quicker but shorter surge.
The storm category badge updates automatically — it is calculated from all five conditions together, just like real meteorologists do.
Preset Scenarios to Try
🌧️
Weak Storm
Warm water (81°F) but high upper winds — the storm stays weak. Good for showing that warm water alone isn't enough.
🌀
Moderate Storm
Hot water (86°F), low upper winds, moist air. Watch flooding spread and the sky shift orange.
🌪️
Major Hurricane
Maximum conditions: 91°F water, very low upper winds, very moist air, flat coast, slow storm. Catastrophic damage and flooding.
Prediction Activity: Before clicking each scenario, ask students to predict — will the storm be strong or weak? Then check the category badge. Which condition surprised them most?
Discussion Questions
▾
- In the Weak Storm scenario, the water was warm — but the storm stayed weak. Why? What was different about the sky winds?
- When you switched to the Major Hurricane, what changed on the screen? Which of the five conditions do you think made the biggest difference?
- The simulator says storm surge is "the #1 killer — not wind." What does that mean? Does that surprise you?
- What happened when you set the Storm Speed to "Very Slow"? Why would a slow storm be more dangerous than a fast one?
- If you were a news reporter and a Major Hurricane was coming, which three conditions would you want to tell people about — and why?
Key Vocabulary
▾
Hurricane Category
A number from 1 to 5 that describes how strong a hurricane is. In the simulator, the category is calculated from all five conditions together — not just one slider.
Sea Temperature
How warm the ocean surface is. Below 79°F, no hurricane can form. Above 86°F, storms can rapidly intensify — gaining strength very quickly.
Upper Winds (Wind Shear)
Strong winds high in the atmosphere that blow across a storm and tear it apart. Low upper winds let a hurricane stay organized and grow stronger.
Storm Surge
A wall of ocean water pushed onto land by a hurricane. It travels farther inland when the coast is flat and the storm moves slowly.
Storm Speed
How fast the hurricane itself is moving toward land. A slow-moving storm dumps more rain and pushes more surge onto shore than a fast one.
Barometric Pressure
The weight of the air pressing down. Very low pressure (like 910 mb) means a very strong storm — air is rushing in fast to fill the center.
Standards Alignment
Select a state below to view aligned standards
▾
Grade 1
S1E1.a
Represent data in tables and/or graphs to identify and describe different types of weather and the characteristics of each type.
Grade 2
S2E3.b
Construct an explanation of the causes and effects of a change to the environment in your community.
NC Science — Grade 2
ESS.2.1.1
Obtain, evaluate, and communicate information to summarize how energy from the sun serves as a source of light and warms the land, air, and water.
ESS.2.1.2
Use mathematics and computational thinking to summarize weather conditions (temperature, wind direction, wind speed, precipitation).
ESS.2.1.3
Carry out investigations to collect data and compare weather patterns that occur over time and relate observable patterns to time of day and time of year.
NC Mathematics
NC.2.MD.10
Organize, represent, and interpret data with up to four categories. Draw a picture graph and a bar graph with a single-unit scale to represent a data set. Solve simple put-together, take-apart, and compare problems using information presented in a picture and a bar graph.
NC.3.MD.3
Represent and interpret scaled picture and bar graphs: collect data by asking a question that yields data in up to four categories; make a representation of data and interpret data in a frequency table, scaled picture graph, and/or scaled bar graph with axes provided; solve one- and two-step "how many more" and "how many less" problems using information from these graphs.
NYS Science — Grades 2–3
2-ESS2-1
Compare multiple solutions designed to slow or prevent wind or water from changing the shape of the land.
3-ESS2-1
Represent data in tables and graphical displays to describe typical weather conditions expected during a particular season.
3-ESS2-2
Obtain and combine information to describe climates in different regions of the world.
3-ESS2-3
Plan and conduct an investigation to determine the connections between weather and water processes in Earth systems.
3-ESS3-1
Make a claim about the merit of a design solution that reduces the impacts of a weather-related hazard.
Grade Band
Grades 4–5
Total Time
40–45 minutes
Format
Individual or partner — inquiry-driven
Big Idea
Multiple variables interact to determine storm impact
Learning Objectives
▾
- 1Explain how sea surface temperature, storm intensity, and coastal terrain interact to determine flood extent and structural damage
- 2Read and interpret the four data cards (category, wind speed, storm surge, pressure) and explain relationships between them
- 3Design and run a "worst case" vs. "least damage" scenario, record the variables, and write a comparative explanation
- 4Connect the Saffir-Simpson Hurricane Wind Scale (SSHWS) categories to real wind speed ranges
- 5Evaluate a claim about storm safety using evidence from the simulator
Lesson Timing
▾
0–5 min
Launch Question
"What's more dangerous in a hurricane — the wind or the water?" Collect predictions.
5 min
5–15 min
Data Card Reading
Students review SSHWS wind speed ranges in the Info Box; connect to data cards
10 min
15–30 min
Variable Investigation
Controlled experiment: change one variable at a time; record results in a data table
15 min
30–40 min
Claim–Evidence–Reasoning
Students write a CER paragraph using their data. Share and critique.
10 min
40–45 min
Revisit Launch Question
Did your prediction match the data? What changed your thinking?
5 min
Using the Storm Simulator
Inquiry-based investigation design
▾
Click the 4th–5th button at the top of the simulator first. This unlocks the full scientific vocabulary: "Sea Surface Temp," "Wind Shear," "Atmospheric Moisture," "Forward Speed," and "Saffir-Simpson Cat" labels.
At this grade band, students conduct a controlled variable investigation. The storm category is calculated from all five sliders combined — isolating each variable reveals its independent contribution.
🎛️ The Five Variables — What Each Does
Sea Surface Temp (SST)
Below 79°F = no storm forms. 79–86°F = storm can develop. Above 86°F = rapid intensification possible. Weight in the model: 40% of intensity calculation.
Wind Shear
High shear disrupts the storm's vertical structure — hurricane winds drop even as shear winds increase. These are two different wind systems. A yellow warning appears in the simulator when shear is high. Weight: 30%.
Atmospheric Moisture
Dry air ingested into the circulation suppresses convection and weakens the storm. Very moist air amplifies rainfall and intensification. Weight: 20%.
Coastal Terrain
Controls how far inland surge penetrates. Flat coast = maximum reach. Hilly = surge blocked sooner. Does not affect storm category — only flooding extent.
Forward Speed
Slower forward speed = longer time over the coast = more accumulated surge and rainfall. Weight in surge calculation: 10% of intensity, plus a direct surge bonus.
📊 Reading the Data Cards
Wind Speed (mph)
Cat 1: 74–95 · Cat 2: 96–110 · Cat 3: 111–129 · Cat 4: 130–156 · Cat 5: 157+ mph (SSHWS). Wind speed also increases with higher SST and moisture.
Storm Surge (ft)
Affected by category, terrain, and forward speed. Katrina's surge reached 25–28 ft. Even 2 ft of moving water can sweep a car away.
Pressure (mb)
Standard atmosphere ≈ 1013 mb. Lower = stronger storm. Cat 5 can drop below 920 mb. Also affected by SST.
Atmospheric Moisture
Displays the moisture slider value (Very Dry → Very Moist). Note: the shear warning callout appears automatically when wind shear is set to "High" or "Very High."
Suggested Investigation: Isolate One Variable at a Time
Set SST = 86°F, Moisture = Medium, Terrain = Flat, Forward Speed = Medium. Hold these constant. Change only the Wind Shear slider from Very Low to Very High, one step at a time. Record the category badge and wind speed for each shear level. Ask: Can a storm over 86°F water stay strong at high shear?
Counter-intuitive result to watch for: When shear is set to "Very High," the category can drop to zero even with hot water. Students often predict warm water always wins — the data challenges that assumption.
Preset Scenarios — Use as Comparison Anchors
🌧️
Weak Storm
SST 81°F, High shear (4), Dry moisture (2), Flat coast, Fast (4). Shows warm water defeated by high shear — category stays low.
🌀
Moderate Storm
SST 86°F, Low shear (2), Moist (4), Gentle slope, Medium speed (3). Mid-range conditions produce a mid-range storm.
🌪️
Major Hurricane
SST 91°F, Very low shear (1), Very moist (5), Flat coast, Slow (2). All variables maximized — observe smoke/fire effects at Cat 5.
Discussion & CER Prompts
▾
Discussion Questions
- When you held SST constant at 86°F and increased Wind Shear from Very Low to Very High, what happened to the storm category? Why would strong upper-level winds weaken a hurricane?
- Compare a Slow forward speed vs. a Fast forward speed at the same intensity. How does forward speed affect storm surge? What does this mean for communities in a storm's path?
- The simulator shows that storm surge is the #1 killer in hurricanes. Using your data table, which combination of variables produced the highest surge? Was it the same combination that produced the highest winds?
- Scientists report that average ocean temperatures are rising. Based on what you observed, what is a specific, testable prediction you could make about future hurricane behavior — and which other variable would matter most alongside SST?
- CER Prompt: "Wind speed is the most important factor in determining hurricane damage." Do you agree or disagree? Write a Claim–Evidence–Reasoning paragraph using data from at least two simulator runs.
Key Vocabulary
▾
SSHWS
Saffir-Simpson Hurricane Wind Scale. Rates hurricanes 1–5 based on sustained wind speed. Cat 1: 74–95 mph; Cat 5: 157+ mph. In this simulator, category is calculated from five variables, not wind alone.
Wind Shear
The change in wind speed or direction with altitude. High vertical wind shear tilts and disrupts a hurricane's organized structure, causing it to weaken even over warm water. It is the single most important factor that limits storm intensification.
Sea Surface Temp (SST)
Ocean surface temperature. Below 79°F storms cannot sustain themselves. Above 86°F, rapid intensification becomes possible — a gain of 35+ mph in 24 hours.
Atmospheric Moisture
The amount of water vapor in the surrounding air. Dry air intrusion into a hurricane's circulation suppresses thunderstorm activity and weakens the storm. Very moist environments amplify rainfall and intensification.
Forward Speed
The translational speed of the hurricane system moving toward land. Slower forward speed means the storm lingers over the coast longer, producing greater rainfall totals and more accumulated storm surge.
Storm Surge
An abnormal rise in seawater level driven by onshore winds and low pressure. Surge is affected by storm intensity, coastal terrain flatness, and forward speed. Hurricane Katrina's surge reached 25–28 ft along the Gulf Coast.
Eye Wall
The ring of intense thunderstorms surrounding the calm eye. Contains a hurricane's highest winds and heaviest rainfall. Visible in the simulator as a bright rotating ring around the storm center.
Standards Alignment
Select a state below to view aligned standards
▾
Grade 1
S1E1.a
Represent data in tables and/or graphs to identify and describe different types of weather and the characteristics of each type.
Grade 2
S2E3.b
Construct an explanation of the causes and effects of a change to the environment in your community.
NC Science — Grades 4–5
ESS.4.3.2
Engage in argument from evidence to explain how humans can adapt their behavior to live in changing environments (e.g. recycling wastes, establishing rain gardens, planting native species to prevent flooding and erosion).
ESS.5.1.1
Analyze and interpret data to compare daily and seasonal changes in weather conditions (including wind speed and direction, precipitation, and temperature) and patterns.
ESS.5.1.2
Analyze and interpret weather data to explain current and upcoming weather conditions (including severe weather such as hurricanes and tornadoes) in a given location.
ESS.5.1.3
Construct an explanation to summarize the ocean's influences on weather and climate in North Carolina.
ESS.5.1.4
Use models to explain how the sun's energy drives the processes of the water cycle (including evaporation, transpiration, condensation, precipitation).
NC Mathematics
NC.4.MD.4
Represent and interpret data using whole numbers. Collect data by asking a question that yields numerical data. Make a representation of data and interpret data in a frequency table, scaled bar graph, and/or line plot. Determine whether a survey question will yield categorical or numerical data.
NC.5.MD.2
Represent and interpret data. Collect data by asking a question that yields data that changes over time. Make and interpret a representation of data using a line graph. Determine whether a survey question will yield categorical or numerical data, or data that changes over time.
NYS Science — Grades 4–5
4-ESS3-2
Generate and compare multiple solutions to reduce the impacts of natural Earth processes on humans.
5-ESS2-1
Develop a model using an example to describe ways the geosphere, biosphere, hydrosphere, and/or atmosphere interact.
5-ESS3-1
Obtain and combine information about ways individual communities use science ideas to protect Earth's resources and environment.
Differentiation
▾
🌱 Scaffolding / Support
- Provide a pre-filled data table with column headers
- Pair with a partner who can narrate changes
- Offer sentence frames: "When I changed ___, the surge ___"
- Use only 2 scenarios (Tropical Storm and Major Hurricane)
⚡ Extension / Enrichment
- Find a real hurricane (e.g., Katrina, Harvey, Ian) and identify which simulator scenario best matches its actual conditions
- Research whether your county is in a hurricane risk zone; compare to the simulator's terrain types
- Write a preparedness plan using surge data from their best "high-risk" scenario
🌐 ELL Support
- Pre-teach: intensity, surge, pressure, terrain
- Allow labeled diagrams in place of written CER
- Simulator is visual-first — encourage observation narration in home language before translating to English
Document Type
Educator Reference
Activity URL
storm-simulator.html
Tech Requirements
Any modern browser, no install
Data Sources
NOAA NHC; Wikipedia (Tropical Cyclone; Storm Surge)
What the Simulator Shows (and Doesn't)
Accuracy notes for educators
▾
The Storm Simulator is an educational visualization, not a physics engine. It accurately reflects these real-world relationships:
- Higher SST (above 79°F threshold) → stronger storm possible (correct)
- Higher wind shear → weaker storm, even over warm water (correct — and often counter-intuitive to students)
- Higher atmospheric moisture → stronger storm (correct)
- Slower forward speed → greater surge and rainfall accumulation (correct)
- Flatter terrain → greater inland surge penetration (correct)
- Lower pressure → more intense storm (inverse relationship, correct)
- Cat 3+ → sky color shifts, smoke/fire effects, lightning flashes (stylized but pedagogically useful)
Educator Note: The model weights SST at 40%, wind shear at 30%, moisture at 20%, and forward speed at 10% of the intensity calculation. Terrain affects flood reach only, not category. Additionally, high wind shear now also reduces the displayed wind speed within a category — the shear warning callout in the UI is an important teaching moment. Flag it explicitly when students encounter it.
Wind speed ranges in the data cards match the official SSHWS scale from NOAA's National Hurricane Center. Storm surge values are modeled on research averages, not a specific storm.
Setup & Technical Notes
▾
1
Open in Browser & Set Grade Mode
Open storm-simulator.html in Chrome, Firefox, Safari, or Edge. No internet required. Works on laptops, Chromebooks, and tablets. Click the grade button (K–1 / 2nd–3rd / 4th–5th) before starting. This switches all slider labels and the storm strength badge to grade-appropriate terminology.
2
Full Screen
Press F11 (Windows/Chromebook) or Ctrl+Cmd+F (Mac) to enter full screen for projected display. The canvas auto-resizes to fill the browser window.
3
Controls — Five Sliders
The simulator has five sliders: Sea Surface Temperature, Wind Shear, Atmospheric Moisture, Coastal Terrain, and Forward Speed. Adjusting any slider automatically resets the storm — no manual reset needed. The storm category badge updates immediately to reflect the new combined conditions.
- Use the three preset scenario buttons to jump to predefined settings
- Press ▶️ Start Storm to begin; the same button becomes ⏸️ Pause
- After the storm completes, press ▶️ to restart the same scenario
4
Shear Warning Callout
When Wind Shear is set to "High" or "Very High," a yellow warning box appears in the controls panel: "High sky winds are tearing the storm apart — hurricane wind speed drops even though sky winds are strong." This is an important teaching moment at all grade levels; point it out explicitly.
5
Lightning & Smoke/Fire Effects
Lightning flashes (with a brief full-screen white flash) appear for Category 3 and above. Smoke and fire glints appear at Category 4–5. For students with photosensitivity concerns, keep SST below 79°F or shear at "High" to prevent the storm from reaching Cat 3+. Lightning frequency is randomized, not continuous.
Assessment Options
▾
Observation (all grades)
Listen for: correct use of vocabulary, accurate cause/effect language ("the surge went higher because the water was warmer"), and unprompted connections to safety or real events.
K–1 Exit Activity
Students draw a storm from above and label the wind, rain, eye, and flood. Acceptable if they can identify at least two parts with appropriate labels.
2–3 Exit Ticket
"If ocean water gets hotter, the storm ______ because ______." Acceptable if the completion is directionally correct (storm gets stronger/bigger) with any causal language.
4–5 CER Paragraph
Evaluate using a 3-point rubric: (1) Clear claim stated; (2) At least one specific data point from their simulator run cited as evidence; (3) Reasoning links evidence to claim using a science concept (surge, pressure, SST).
Family & Home Learning Note
▾
📬 For Families
Your child explored a hurricane simulator today. The tool shows an aerial view of a storm moving toward a coastline — the same view you see on news weather maps. They adjusted sliders to control storm strength, ocean temperature, and the shape of the coast, then watched how flooding and damage changed.
Here are a few ways to continue the conversation at home:
- Watch the weather news together and point out words like category, surge, or pressure when meteorologists use them.
- Ask your child: "What was the biggest surprise you learned today?" (Many students are surprised that water — not wind — is the #1 killer in hurricanes.)
- Talk about preparedness: Does your family have a plan for severe weather? What would you do if a storm was coming?
The simulator file can be opened on any home computer or tablet — no internet required. Just open the HTML file in a web browser.
Sources & Credits
▾
- NOAA National Hurricane Center. Saffir-Simpson Hurricane Wind Scale. nhc.noaa.gov
- Wikipedia contributors. "Tropical Cyclone." Wikipedia, The Free Encyclopedia.
- Wikipedia contributors. "Storm Surge." Wikipedia, The Free Encyclopedia.
- Georgia Department of Education. Georgia Standards of Excellence — Science. georgiastandards.org
- North Carolina Department of Public Instruction. North Carolina Standard Course of Study — Mathematics, Grades K–5. dpi.nc.gov
- North Carolina Department of Public Instruction. North Carolina Standard Course of Study — Science, Grades K–5. dpi.nc.gov
- New York State Education Department. New York State P-12 Science Learning Standards. nysed.gov
- New York State Education Department. New York State Next Generation Mathematics Learning Standards. nysed.gov
- Featured image: Cyclone Catarina, photographed from the International Space Station, March 26, 2004. NASA/ISS. Public domain.
Ready to explore? Open the interactive simulator in a new tab.
🌀 Launch the Storm Simulator