Stormline
Your-block weather intelligence for NYC — flood zones, subway impact, and plain-English action steps for severe weather days.
NYC commuters and residents during severe weather
- Hyperlocal forecast keyed to your saved addresses, with FEMA flood-zone overlay and street-level rain predictions
- Live transit impact predictions that flag which subway lines and bus routes typically flood during your morning's forecast
- Plain-English action recommendations — work from home, leave early, avoid the underpass — based on your saved commute and your kids' schools
- Push alerts tuned to severity thresholds (sustained wind, flooded underpass, heat advisory) so you only get notified when action matters
NYC's climate is delivering more frequent flash floods and severe storms, and 200+ searches for 'new york weather' during Mamdani's 'take this seriously' warning shows residents don't trust generic apps to translate NWS alerts into 'should I work from home?' answers.
Real recurring pain point: NYT documented subway flooding in July 2025 storm, MTA runs its own alert system, and NYC residents mob weather searches during NWS warnings; Carrot Weather users report juggling 11+ weather apps.Why the Subway Still Floods in New York After Billions in Renovations ↗Home | Notify NYC ↗
Crowded adjacent space: ABC7 Accutrack, Carrot Weather, Apple/Dark Sky, and free government Notify NYC all serve parts of the job, but no product combines block-level NYC flood zones + subway impact + 'should I work from home' action steps.Accutrack Radar | New York Weather News - ABC7 New York ↗CARROT Weather Support ↗
Carrot Weather proves users pay for premium weather (subscription model), but free Apple Weather + free Notify NYC + free MTA alerts create strong price pressure; no direct evidence users will pay for a NYC-only weather subscription.CARROT Weather Subscriptions FAQ ↗
NPCC4 and 2025 climate reporting confirm NYC extreme rainfall is increasing in frequency and intensity; 'flash flood summer 2025' shows the trend is accelerating, not peaking.What New York Can Do to Survive Flooding - The New York Times ↗2025's Flash Flood Summer - Climate Adaptation Center ↗
All required data is accessible: NWS alerts (free, used by Notify NYC), MTA service-alert APIs, NYC flood zone data on NYC Open Data, and an LLM for plain-English action steps; buildable in weeks, not months.Home | Notify NYC ↗Sign up for email and text alerts from the MTA ↗