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Compare · 6 vendors · Sourced

Lightning alert vendors compared: prediction, detection and sensors

Six lightning-alert vendors, each compared with Flash in its own article, using only what each company publishes and the date we checked it. This page puts the short version side by side.

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Figure · Where each alert sits on the clock · Illustrative example · Not live weather

At a glance

Each row is a summary of its full comparison, which cites the vendor’s own pages and the date we checked them. Where a vendor publishes no figure, we say so instead of estimating one. Prices are left out: none of these vendors publishes one.

Lightning alert vendors and Flash compared at a glance
VendorHow it alertsCoverageHardwareLead time or speed
Perry WeatherDetection: NLDN strikes inside your configured radiusA radius you set around each locationSirens, strobes, weather station and relay controller, sold as packagesAlerts in under 20 seconds of detection, per its site
DTN WeatherSentryDetection: real-time strikes inside ranges you chooseAlert ranges you set around each venueOnGuard Siren add-onAlerts on detection; storm corridors project a storm’s path and ETA over the next 30 minutes
AEM Sferic Siren (Earth Networks)Detection: Earth Networks Total Lightning Network, in-cloud and cloud-to-groundA radius you configure117 dB horn and strobes; voice, wall-mounted and solar optionsAlerts on detection inside the radius
Thor Guard TG360On-site sensor: reads the atmospheric electric field above the siteA defined area around each installed sensorSensor, weather station, server laptop, radio horns and strobesAims to warn before a first strike near the sensor; no accuracy figure found
Baron Threat NetDetection: strikes within a set distance of a saved location5, 8, 10, 12 or 15 miles around a saved locationNone describedAlerts on detection inside the distance
WeatherSTEMDetection: lightning inside a notification zone you drawRings or custom-shaped zones you drawNone required; optional weather stations, sirens and beaconsAlerts on detection inside the zone
FlashPrediction: a forecast of cloud-to-ground strike likelihood per cellEvery 1×1 km cell in the continental U.S., refreshed every 2 minutesNone required; relays for existing horns, or Flash Weather ShieldUp to 60 minutes before the first strike

Detection and prediction do different jobs, and many policies use both: detection confirms a strike and runs the all-clear clock, prediction gives the time before the first strike. The prediction vs sensors vs detection explainer covers the three technologies, and the accuracy method shows how Flash’s up to 99.6% is scored. Spot something out of date? Write to support@flashweather.ai and we will re-check it.

Read the full comparisons

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