Compare hourly planning windows
See this course’s project requirements
A weather-planning packet with forecast metadata, probability interpretation, window comparison, update log, alert guide, and an indoor-fallback decision card.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- Record the correct place, issue time, and valid period.
- Explain probability without converting it into rain duration.
- Apply every hourly preference condition and threshold boundary.
- Track a forecast update and respond to the stated trigger.
- Build a decision card with a feasible fallback, recheck times, and alert precedence.
Review and revise
Use these criteria to check your work and choose what to improve.
- Forecast values retain location, period, and units.
- Probability and threshold reasoning are accurate.
- The updated decision uses the latest comparable evidence.
- The plan follows current official alert instructions and preserves unknowns.
Want more background?
The idea in everyday life
Fictional club preference rule: choose an outdoor 2-hour window only if both listed hours have rain chance below 40%, temperature 60–80°F, and gusts below 20 mph. This is a comfort/logistics rule, not a safety standard; official warnings override it. Hour cards: 1 p.m. 65°F/20%/10 mph; 2 p.m. 68°F/30%/12 mph; 3 p.m. 70°F/50%/15 mph; 4 p.m. 69°F/40%/18 mph. Compare 1–3 p.m. using 1/2 cards and 3–5 p.m. using 3/4 cards.
Compare the whole activity window against stated needs, not one attractive weather number.
Compare hourly planning windows: guided practice
Compare the whole activity window against stated needs, not one attractive weather number.
Use paper or a free local text editor. This is an original fictional practice case; do not submit its records to a real service. Start this lesson with these facts, even if an earlier variation changed them. Fictional club preference rule: choose an outdoor 2-hour window only if both listed hours have rain chance below 40%, temperature 60–80°F, and gusts below 20 mph. This is a comfort/logistics rule, not a safety standard; official warnings override it. Hour cards: 1 p.m. 65°F/20%/10 mph; 2 p.m. 68°F/30%/12 mph; 3 p.m. 70°F/50%/15 mph; 4 p.m. 69°F/40%/18 mph. Compare 1–3 p.m. using 1/2 cards and 3–5 p.m. using 3/4 cards.
1. Apply each threshold
Mark whether each hour meets all three preference conditions.
You should see: 1 and 2 p.m. pass; 3 and 4 p.m. fail rain chance.
All stated conditions must be met for each included hour.
2. Compare the windows
Check both cards in each 2-hour window.
You should see: 1–3 p.m. passes the preference rule; 3–5 p.m. does not.
The plan needs conditions across its entire window.
3. Check the boundary
Explain why exactly 40% fails a below-40% rule.
You should see: 40 is not below 40.
Boundary wording matters in applying thresholds.
4. Keep safety separate
Add the current-alert check to the preference decision.
You should see: Use the earlier window only if current official conditions and alerts also permit the activity.
A convenient numerical rule cannot establish weather safety.
What to finish
Compare hourly planning windows record with the worked decisions and changed-case check.
Watch for this
Treating a made-up event preference threshold as a weather-safety standard.
How can I tell I understand it?
Apply an explicit event rule to several hourly forecast values. Explain the evidence behind the result and correct any mismatch.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
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Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
Go to the knowledge checkOptional course overview video · same video as Lesson 1
How to Find Your Hourly Forecast
From NWSLouisville. Watch here or open it on YouTube .
Optional course overview. Follow the written steps below at your own pace.Tools, templates, and lesson sources
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Sources and further reading
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Source & access notes · checked 2026-09-12
Inspected place selection, hourly variables, date/time axes, and forecast-period controls.
Access: Public page or PDF inspected without payment or institutional sign-in on September 12, 2026. Optional external accounts are unnecessary for this course.
Reuse: Link and original paraphrase only. Public access does not grant blanket reuse; no provider text, figures, or exercises are reproduced.
Source & access notes · checked 2026-09-12
Inspected watch versus warning and immediate action for severe thunderstorm warnings.
Access: Public page or PDF inspected without payment or institutional sign-in on September 12, 2026. Optional external accounts are unnecessary for this course.
Reuse: Link and original paraphrase only. Public access does not grant blanket reuse; no provider text, figures, or exercises are reproduced.
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