Weather Underground history

The origin (1995)

• Founded at University of Michigan.
• Started by Jeff Ferguson and Chris Schwerzler.
• Originally a graduate school project.
• Aimed to make weather data more accessible.
• Original goal: better weather forecasts for public.
• Early adopters: college students.

The early growth (1995-2005)

• 1997: Personal weather station (PWS) network started.
• Anyone with home weather station could submit data.
• Network grew to tens of thousands globally.
• First major crowdsourced weather platform.
• Free public dashboard.
• Model comparisons popularized.
• 2001: Weather Underground incorporated.
• Growing revenue from advertising.

The Weather Company era (2012)

• 2012: Sold to The Weather Company for $260M.
• Combined with Weather Channel operations.
• Continued as separate brand.
• PWS network continued growing.
• Cross-platform integration.
• Enterprise offerings expanded.

The IBM acquisition (2015)

• 2015: The Weather Company sold to IBM for $2B.
• Weather Underground now IBM property.
• Integrated with Watson AI.
• Business focus expanded.
• Enterprise weather services.
• Continued consumer platform.
• Personal weather stations still supported.

The current platform (2026)

The Personal Weather Station network

• Free to submit data.
• Free to view others' data.
• Standardized data format.
• Feeds into IBM enterprise products.
• Users maintain equipment.
• Some receive premium features.
• Community aspect strong.
• Quality control varies.

The Cat 6 blog (Jeff Masters)

• Started 2005.
• Deep science blog by former hurricane hunter Jeff Masters.
• Read by weather professionals.
• Hurricane season commentary.
• Climate change coverage.
• Historical event analysis.
• Migrated with Weather Underground.
• Cat 6 references the hypothetical hurricane category.

Competitors that emerged

The controversies

• 2015 UI redesign — user protest.
• Data quality debates.
• Enterprise pricing changes.
• Some volunteer contributors dissatisfied.
• Ad frequency criticism.
• IBM ownership questions.
• Some regional forecast accuracy debates.

What Weather Underground is best at

• Personal weather station data (unique).
• Historical data access.
• Regional forecast detail.
• Cat 6 blog for weather geeks.
• Free basic access.
• API for enterprise.
• Weather geek community.

What it lags at

• Consumer app polish (behind competitors).
• Marketing to non-technical users.
• Some regions lack PWS density.
• App load times.
• Data visualization aesthetic.

For chasers using Weather Underground

• Great for hyperlocal forecasts.
• PWS network for real-time observations.
• Historical data for case studies.
• Radar composite good.
• Storm severity index.
• Not the primary forecast tool.
• Complementary to HRRR, SPC.

For enterprise users

• IBM Weather offers business-grade services.
• API access.
• Custom forecasting.
• Aviation weather.
• Agriculture applications.
• Insurance risk assessment.
• Utility demand forecasting.
• Retail weather intelligence.

For citizens with weather stations

1. Buy PWS ($200-$2000).
2. Register on wunderground.com.
3. Submit data 24/7.
4. Compare with neighbors.
5. Provide value to community.
6. Get premium features.
7. Feel connected to weather.
8. Contribute to science.

The lasting legacy

• Popularized crowdsourced weather.
• Trained thousands of weather enthusiasts.
• Model comparison publicized.
• Deep science accessible to public.
• Community formed around weather passion.
• Multi-billion-dollar acquisition target.
• Continues to serve millions.
• Ongoing evolution.

Learn more

• Best free weather apps
• Home weather station buying guide
• How forecast accuracy improved
• NOAA data sources