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Severe Weather:
Alerts and Tracking

Government-Issued Alerts (US and Canada)

County-Specific Severe Weather Watches & Warnings

County-Specific Severe Weather Watches & Warnings

Severe Weather Alerts (United States)

  • Real-time severe weather alerts for the entire US
  • Alerts are provided as soon as they are issued by the National Weather Service
  • No other weather provider offers real-time access to this information in so many unique technical formats.

Environment Canada Severe Weather Alerts (Canada)

  • Real-Time location-specific warnings, watches, and advisories issued by Environment Canada.
  • Alerts are categorized according to 38 alert types including thunderstorm warnings, winter storm warnings, marine warnings, and wind advisories.
  • Alerts are limited to within Canada.
  • Canadian alerts are also offered as part of a U.S.-Canada combined alert product.
Sample Environment Canada Alert

Sample Environment Canada Alert

Custom Alerts and Advisories (available worldwide)

Custom Alerts

Sample Custom Alert Email

Custom Alert Email

  • Custom alerts can be generated for any specific weather criteria
  • Alert criteria can be in the past based on climate data or in the future based on weather forecasts
  • Weather alerts can be generated that incorporate both past and future weather data
  • Custom alerts can be sent out via email to specific user groups, via FTP, or via SMS using carrier email-to-SMS transmission

Current Condition Observation Alerts

  • Alert notifications of severe weather events based on thousands of global, real-time current condition reports.
  • Alerts are issued against standard criteria or customized for client requirements.
Sample Observation Alert

Sample Observation Alert

Sample Forecasted Significant Weather Alert

Sample Forecasted Significant Weather Alert

Forecasted Significant Weather

  • Forecasted Significant Weather highlights areas with the most significant weather as compared to climatology.
  • Created to be used in conjunction with Severe Weather Advisories.
  • Forecasted Significant Weather uses a ranking of 0-100 to indicate the significance of weather in a particular location with a focus on precipitation, winds, and temperature.

Severe Weather Advisories

Global Severe Weather Advisory System

  • First and only worldwide severe weather advisory system.
  • Our advisories inform people around the globe of potentially dangerous or severe weather conditions in their local area BEFORE they happen.
  • Advisories are updated four times daily and are available for 80,000+ worldwide locations.
  • Advisories cover the next 24 hours.
  • Options for upcoming 6 hours, 48 hours, and upcoming 5 days are also available.
Sample Custom Advisory

Sample Custom Advisory

Examples include:

  • Precipitation
  • Lightning Strider Alerts (US only)
  • High winds
  • Freeze alerts
  • Ice accretion
  • Extreme heat alerts
  • Hail potential
  • Tornado potential
  • Surf alerts
  • Tropical storm updates


Real-Time Hail Tracking (USA)

  • Track the size and movement of storm cells containing hail based on Doppler Radar signature
  • Provides the probability of hail associated with a storm cell
  • Indicates the maximum hail diameter reported
  • Available through our API in XML format
  • Data also available in a map tile interface with scroll-overs for additional detail
Sample Custom Advisory

Sample Hail Advisory

Also included:

  • Presence of any tornado vortex signatures
  • Vertically integrated liquid
  • Maximum Doppler Radar response
  • Storm cell top height
  • Storm cell movement

Hail Forecast (Global)

  • Hail forecast is available as a Cloud Weather Service (CWS) plug-in.
  • Forecast for a probability of significant hail is available out to 7 days.
  • The criteria for significant hail has been defined by the Storm Prediction Center

Flood Risk

  • Globally available flood risk is based on past, current, and future precipitation compared to typical during a given period.
  • Precipitation observations and forecasts are dynamically integrated over time to capture flood potential as it relates to given conditions across the landscape.
  • Flood forecasts are available day-by-day at 10km with regional scales to 1km.
  • Flood risk is broken into 5 categories – Low, Moderate, High, Very High, and Severe.
  • Data can be delivered as kmz/kml, map tile, geojson, or geotiff/shapefile/geopackage.

Icing Forecasts

Icing index for any global location is available via CustomWeather’s Cloud Weather Service. Variables include:

  • Surface forecasts for categorical freezing rain
  • Categorical ice pellets
  • Percentage frozen precipitation
  • Frozen rain
  • freezing rain
  • highest tropospheric freezing level geopotential height
  • 0°C isotherm geopotential height

Lightning (North America)

Accuracy within 150 meters  |  Near 100% efficiency rating  |  Timing to the microsecond  |  Reporting within 12 seconds.

Lightning Alerts via Email

  • Real-time lightning alerts via email can be delivered for specific locations across North America
  • Alerts are sent according to user-defined distance thresholds (typically 5 or 10 miles)

Example alert via email:

Notification Rule: Lightning - 10 mi

Lightning alert within 10mi 30min

Lightning Distance: 7.31 miles
Stroke Location: Lat: 29.6919 Lon: -95.1554
Type: IC
Peak Current: +11.658 kA

Activated Time: 08/18/2021 02:41:41 PM CDT

Hurricane Tracking

Tropical storm and hurricane tracking products for the North Atlantic, North Pacific, and Indian Oceans throughout the hurricane season.

Hurricane Tracking Information

Hurricane tracking includes:

  • Current movement and minimum central pressure
  • Forecasted storm positions
  • Forecasted wind speeds, wind gusts, wind radiia
  • Forecasted wave radii
  • Forecasted conditions are provided for the upcoming 72 hours

GIS Solutions

CustomWeather offers a range of GIS formats enabling integration of the data directly into a client’s own geospatial application.

  • Tropical storm paths
  • Error cones
  • Wind swaths

Hurricane Maps

  • Proprietary tracking maps with both past track information and future path projection
  • All information is in an easy to read format for optimum plotting and display
Custom Alerts
Custom Alerts
Custom Alerts
Custom Alerts
Custom Alerts
Custom Alerts

Need a Custom Solution?