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What Is NimboStratusAI
Mission, vision and platform overview
Our Founders
Meet the team behind the platform
Roadmap
Upcoming features and planned updates
Settings
Account, subscription, notifications
Community
Forum, reports and discussions
Dark Mode
Currently active — dark theme enabled
New Features NEW
Ask NimboStratusAI
AI-powered weather Q&A for your location
Climate Education
Learn about climate, weather science, and more
Hazard Tracker
Storm Chaser Tools PREMIUM
Advanced severe weather tracking suite
Today's Chase Setup
SPC outlook, probabilities, instability & active signals
Enter a ZIP code to load today's chase setup.
Not an official forecast. Environment values (shear, SRH, LCL, CIN, STP, SCP) are computed from Open-Meteo model data and are approximations only — not official NWS or SPC mesoanalysis products. Always rely on official SPC outlooks, NWS warnings, and local forecasts for life-safety decisions.
Nearby Lightning
Enter a ZIP code to check nearby lightning.
Live Storm & Lightning
LIVE
Animated radar reflectivity + live lightning bolt markers — updates every 5 min. Use play/pause to control the loop.
RADAR dBZ
2050+
RainViewer + METAR · 5 min refresh
Lightning Safety
Stay safe during thunderstorms. When thunder roars, go indoors.
NWS Lightning Safety
Official safety tips and resources
SPC Fire Weather Outlook
Dry lightning and fire weather risk areas
NEXRAD Radar
LIVE
Detecting…
What am I looking at?
Reflectivity shows where precipitation is and how intense it is. Storm chasers look for strong cores (bright red/purple), hook-like shapes curling around a wall cloud, and areas where storms are rapidly intensifying.
Enter a ZIP on Dashboard to load radar
20-frame loop · NOAA opengeo Super-Res WMS
HRRR Simulated Radar
High-Resolution Rapid Refresh model — 3 km resolution, updated hourly
HRRR Radar - CONUS
Tropical Tidbits — Simulated Reflectivity
College of DuPage HRRR
Interactive model viewer with soundings
NOAA Storm Prediction Center
The SPC issues daily convective outlooks categorizing severe weather risk across the US. Tap any product below to view the official, up-to-date graphic directly from NOAA.
General Thunder
Marginal
Slight
Enhanced
Moderate
High
Day 1 Convective Outlook
Today's severe weather risk across the US. Categories from General Thunder through High risk indicate the likelihood of tornadoes, large hail, or damaging winds.
- Updated 4x daily (0100, 0600, 1300, 1630 UTC)
- Covers today through 1200 UTC tomorrow
- Includes categorical and probabilistic outlooks
Day 1 Tornado Probability
Probability of a tornado occurring within 25 miles of any given point today. A hatched area indicates a 10%+ chance of significant tornadoes (EF2+).
- Hatched area = significant tornado threat
- Updated with each Day 1 issuance
- Used by emergency managers nationwide
Day 1 Hail Probability
Probability of large hail (1"+ diameter) within 25 miles of a point today. Hatching indicates a 10%+ chance of significant hail (2"+ diameter).
- 1" threshold = quarter-size hail
- Significant hail (2"+) hatched separately
- Updated with each Day 1 issuance
Day 1 Wind Probability
Probability of damaging winds (58+ mph gusts) within 25 miles of a point today. Hatching indicates 10%+ chance of significant gusts (75+ mph).
- 58+ mph qualifies as damaging wind
- Derecho events often show broad wind areas
- Updated with each Day 1 issuance
Day 2 Convective Outlook
Tomorrow's severe weather risk areas. Updated twice daily, this outlook helps emergency managers and the public prepare 24-48 hours in advance.
- Updated at 0600 and 1730 UTC
- Covers from 1200 UTC tomorrow
- Less detail than Day 1 — broader risk areas
Day 3 Convective Outlook
Severe weather risk 48-72 hours out. Issued once daily, this extended outlook identifies broader areas where organized severe weather is possible.
- Issued once daily at 0730 UTC
- Probabilistic only — no categorical areas
- Used for early situational awareness
SPC Outlook Center
All official SPC convective products
Day 4-8 Extended Outlook
Extended probabilistic severe weather outlook
SB-CAPE
POINT VALUES
HRRR (NCEP) via Open-Meteo
SPC · HRRR · Open-Meteo
CAPE & INSTABILITY
SB-CAPE
J/kg
MU-CAPE
J/kg
ML-CAPE
J/kg
SB-CIN
J/kg
ML-CIN
J/kg
LAPSE RATES
700–500mb
°C/km
0–3 km
°C/km
WIND SHEAR
0–6 km
kt
0–1 km
kt
HELICITY
0–1 km SRH
m²/s²
0–3 km SRH
m²/s²
COMPOSITE PARAMETERS
SCP
index
STP
index
EHI
index
Map layers: SPC operational mesoanalysis (hourly). Tap anywhere on the map to see HRRR model values at that point. Multiple layers can be active at once.
Mesoscale Discussions
SPC Mesoscale Discussions are issued by the Storm Prediction Center to highlight areas of significant weather potential in the near term — typically 1–3 hours before a watch is expected. They are one of the most actionable products for storm spotters and chasers.
Active Mesoscale Discussions
Official SPC product — opens in-app
What to Look For in an MD
MDs describe the reason for issuance, current radar and satellite trends, the area of concern, and what watches or severe weather may follow. They also include a probability of watch issuance within the next 2 hours.
NWS Forecast Discussions
Area Forecast Discussions — AFD
SPC Watch Discussions
Watch-related text products
Winter Weather Tools
PREMIUM
Snow depth, snowfall forecast, ice accumulation, precip type & NWS winter alerts
Today's Storm Reports
All reports today: tornadoes, damaging winds, and large hail
SPC Storm Reports for today
Tap to expand
SPC Storm Reports Archive
Historical storm reports database
Active Watches
Current tornado and severe thunderstorm watches issued by the SPC. No color fill means no active watches.
SPC Convective Watches
Tap to expand
Watch Details
No active tornado or severe thunderstorm watches at this time
SPC Watch Page
Official SPC active watch products
AI Storm Analysis
AI-generated storm outlook and severe weather risk assessment for your area.
Aviation
Official aviation weather tools powered by FAA and NOAA/AWC data sources.
Aviation Weather
METAR & TAF for nearby airports — flight category, wind, visibility, ceiling
Night Flight Conditions PREMIUM
Moon illumination, twilight times, ceiling and darkness rating for night operations
Flight Path Weather PREMIUM
Enter departure & arrival airports for en-route weather analysis
Coastal
Select a location to see coastal data
Prepare
Be Prepared
Use these guides to build your emergency preparedness plan. Being ready before disaster strikes can save lives.
Build an Emergency Kit
- Water — one gallon per person per day for at least three days
- Food — at least a three-day supply of non-perishable food
- Battery-powered or hand-crank radio and NOAA Weather Radio
- Flashlight and extra batteries
- First aid kit and prescription medications
- Whistle to signal for help
- Dust masks to filter contaminated air
- Plastic sheeting and duct tape to shelter in place
- Moist towelettes, garbage bags, and plastic ties for sanitation
- Wrench or pliers to turn off utilities
- Manual can opener for food
- Local maps and cell phone with chargers and backup battery
Tip: Review your kit once per year and replace expired items. Keep it in an easy-to-grab location near your exit.
Store Water Safely
- Store one gallon per person per day — minimum 3 days, ideally 2 weeks
- Use food-grade water storage containers
- Store water in a cool, dark place away from direct sunlight
- Replace stored water every 6–12 months
- If tap water is unsafe, boil for 1 minute or use purification tablets
- Don't forget water for pets — typically one quart per day for small dogs
Tip: Commercially bottled water is the safest option. Keep the original sealed cap until use.
Plan Evacuation Routes
- Know at least two exits from every room in your home
- Identify multiple evacuation routes from your neighborhood
- Plan a meeting place outside your home if you can't return
- Know your local emergency shelter locations
- Practice your evacuation plan with all household members
- Plan for pets — most public shelters do not accept animals
- Keep your gas tank at least half full during storm seasons
Tip: Download offline maps so you can navigate without cellular data during an emergency.
Emergency Communication Plan
- Designate an out-of-state contact as your family's communication hub
- Make sure all family members know the contact's number by heart
- Establish a meeting place if you cannot return home
- Sign up for local emergency alerts and NOAA Weather Radio
- Enable wireless emergency alerts on all mobile devices
- Keep a written list of important phone numbers — don't rely only on your phone
Tip: Text messages often go through when voice calls can't during disasters due to network congestion.
Special Needs & Medical Preparedness
- Keep a 30-day supply of prescription medications where possible
- Register with your local emergency management office if you have special needs
- Carry copies of medical records, insurance cards, and prescriptions
- If power-dependent (oxygen, dialysis), notify your utility company and register with local fire/EMS
- Know locations of the nearest hospitals and urgent care centers
- Plan for elderly family members and those with mobility limitations
Tip: Ask your doctor about emergency supplies of critical medications before hurricane season.
Home Safety & Shelter-in-Place
- Identify the safest room for each type of hazard (tornado = interior room, earthquake = door frame or under table)
- Secure heavy furniture and appliances to walls to prevent tipping
- Know how to shut off gas, water, and electricity to your home
- Keep fire extinguishers on each floor and know how to use them
- Test smoke and carbon monoxide detectors monthly
- Keep important documents in a waterproof, fireproof container
Tip: Practice shelter-in-place drills so everyone in your household knows exactly what to do when seconds count.
Understand how environmental conditions, severe weather, and aviation weather work — and what to do when they affect you.
Climate Trends
AI
Recent Disasters
Weather Science
What is CAPE & CIN?
Learn how the atmosphere stores and releases energy to fuel explosive thunderstorm development.
How Tornadoes Form
Discover the step-by-step process that turns a supercell thunderstorm into a violent, ground-scraping tornado.
How Hurricanes Form
How warm ocean water, wind shear, and atmospheric disturbances combine to birth and sustain a hurricane.
Reading a Surface Analysis Chart
Learn to decode the pressure systems, fronts, and isobars that meteorologists use to track daily weather patterns.
Understanding SPC Outlooks
How meteorologists assess and communicate daily severe weather risk — and what each outlook level really means.
What is Wind Shear?
The role wind shear plays in organizing severe thunderstorms, spawning tornadoes, and threatening aircraft on approach.
Aviation Weather
How to Read a METAR
Learn to decode the standard hourly weather report that pilots and controllers rely on at every airport.
Flight Categories Explained
How ceiling height and visibility determine whether conditions are VFR, IFR, or too dangerous to fly.
Reading a TAF
How to interpret a terminal aerodrome forecast and understand change groups that show how conditions shift over time.
SIGMETs & G-AIRMETs
The difference between urgent in-flight hazard advisories for all aircraft and those targeting light general aviation.
Wind Shear in Aviation
Why low-level wind shear and microbursts near airports are among the most dangerous weather hazards in aviation.
PIREPs — Pilot Reports
How pilots file and share real-time in-flight weather observations about turbulence, icing, and wind shear.
Climate Education
Climate Change Basics
Learn about global warming, greenhouse gases, and their effects on our planet.
Sea Level Rise
Track how rising oceans threaten coastal communities across America.
Extreme Weather Trends
How climate change is making hurricanes, floods, and droughts more severe.
Wildfire & Climate
The link between rising temperatures, drought, and increasingly destructive wildfires.
Air Quality & Health
How pollution and climate change affect the air we breathe and our health.
US Climate Resilience
Federal resources for building community resilience to climate impacts.
Kids & Families
NASA Climate Kids
Games, activities, and videos about climate change, weather, and Earth science made fun for young learners.
NOAA SciJinks
Interactive weather games and simulators including tornado, hurricane, and lightning creators.
WWF Wild Classroom
Free lessons about wildlife, habitats, oceans, and how climate change affects animals and ecosystems.
JetStream - NWS Weather School
Learn about weather phenomena with hands-on activities. Build barometers, make clouds, and explore the water cycle.
UCAR SkySci for Kids
Weather wonders, Earth science, and sky phenomena with interactive activities.
NASA Kids' Club
Games and activities aligned with STEM education standards, focused on NASA missions and Earth observation.
UCAR Classroom Activities
Hands-on experiments about climate zones, glaciers, air pollution, the carbon cycle, and extreme weather.
NASA Earth for Kids
Build virtual CubeSats, explore the atmosphere, and learn how NASA satellites study our changing planet.
NSSL Severe Storms for Kids
Coloring books, weather games, trading cards, and worksheets about severe storms from NOAA's storm lab.
EPA Climate Change for Students
Student-friendly resources about climate change science, impacts, and what students can do to help.
Government Resources
National Climate Assessment
Comprehensive scientific assessment of climate change impacts in the US.
NOAA Climate Dashboard
Global climate data, visualizations, and education from NOAA.
NASA Climate
Satellite data, visualizations, and science about Earth's changing climate.
EPA Climate Change
Key information on climate science, impacts, and what you can do.
US Drought Monitor
Weekly updates on drought conditions across the United States.
FEMA National Risk Index
Explore natural hazard risk data for every US county and community.
All educational content in this section is sourced from official US government agencies: NOAA, NWS, NHC, SPC, NSSL, EPA, NASA, FEMA, FAA, and the Aviation Weather Center. Tap the link icon on any topic to read the full source material.
Settings
Premium Subscription
Saved Locations
Notifications
Browser Push Notifications
Alerts for saved locations
Push Notifications
Master on/off for all alerts
Watches & Warnings
Tornadoes, hurricanes, floods, tsunamis
Advisories & Statements
Wind, heat, fog, marine, coastal
Sudden Hazard Alerts
Earthquakes, volcanoes, evacuations, outages
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