Alert Service

Hourly Forecast Alerts

Hour-by-hour alerts triggered at your weather threshold, forecast out 36 hours. Delivered by email or text.

  • Temperature, wind chill, heat index, dew point, wind, and relative humidity; alerts are triggered when your thresholds are crossed
  • 30,000+ U.S. cities and towns
See sample alerts
Authoritative Source

Hour-by-hour forecast alerts to meet many needs. iAlert has been delivering forecast and alert notification services for nearly two decades.

How It Works

Your hourly forecast alert, sent when your threshold is reached.

  1. 01

    Generated

    A 36-hour forecast is continually generated and checked against the thresholds you set. Temperature, wind chill, heat index, dew point, wind, and relative humidity are all in scope.

  2. 02

    Localized

    Forecast data is specific to your city or town, down to the hour.

  3. 03

    Delivery

    When a threshold is met, an alert is sent to you by email or text. No threshold crossed, no alert sent.

What You Get

Built around four promises.

Everything below is part of the $12.00 monthly subscription.

36-Hour Forecast

Hour-by-hour conditions for the next 36 hours. Long enough to plan around, short enough for high confidence.

  • Forecast regenerated every hour
  • Hour-by-hour threshold analysis and alerting

Every Variable That Matters

Temperature, wind chill, heat index, dew point, wind, and relative humidity; alerts are triggered when your thresholds are crossed. Plan for weather impacts at a job site, temperature swings during growing season, or timing an outdoor event.

  • Each variable triggers its own alert
  • Numbers, not vague summaries

Threshold-Driven Alerts

When any hour in the 36-hour forecast crosses a threshold you set, the alert goes out automatically. No checking required. The forecast does the watching for you.

  • Fires automatically at threshold crossing
  • Adjust thresholds anytime from your account

Email or Text Delivery

Each alert goes out the moment a threshold is crossed, by email, text, or both. You decide where it lands.

  • Primary and secondary email per subscription
  • 1 text-enabled device per subscription
Sample Digest

Exactly what arrives, in your channel of choice.

Below is the format of an iAlert hourly forecast digest in each delivery channel. Sample copy only; some variation may exist, and the report location and timestamp on a live alert will be your own.

iAlert Forecast Alerts
no-reply@ialert.com
2:00 PM
[Sample] Temperature Forecast Alert: Chicago O'Hare (KORD)
LocationChicago O'Hare (KORD)
Alert ParameterTemperature
Threshold>= 95 F

Matching Forecast Hours

Forecast Time Value
Sat Mar 28 02:00 PM CDT96 F
Sat Mar 28 03:00 PM CDT97 F
Sat Mar 28 04:00 PM CDT95 F

View Full Current Conditions ›

iAlert Forecast Alerts. Adjust your thresholds, location, or channels anytime from your account.

How It Works

The system watches the forecast. You get the alert.

Every hour, iAlert checks each slot in the 36-hour window against your thresholds. The pins below mark the moments that would trigger an alert.

Coverage at a glance.

  • 30,000+ U.S. cities and towns
  • All 50 U.S. states served
  • 36 hr Hourly resolution
  • 16+ yrs In continuous operation
Questions, answered

Before you subscribe.

How often do alerts go out?
An alert goes out each time the 36-hour forecast is checked and a threshold crossing is detected. The forecast is checked every hour. If no thresholds are crossed, no alert is sent. On active weather days you may receive multiple alerts; on quiet days, none.
Can I monitor more than one variable at a time?
Yes. Each of the six tracked variables can have its own threshold: temperature, wind chill, heat index, dew point, wind, and relative humidity. Alerts fire independently for each, so a single active weather event can trigger several alerts across different variables.
How current is the forecast behind each alert?
The system checks the most current 36-hour forecast every hour. Each alert reflects the forecast as it stood at the moment the threshold crossing was detected, so the data behind every alert is never more than an hour old.
Does it work everywhere in the U.S.?
Yes, across all 50 states. The location list covers 30,000+ U.S. cities and towns. Set a location and thresholds are monitored and alerts triggered for that location.
Can I stack this with other iAlert services?
Yes. Add the service to your cart and log in when prompted during checkout. Once signup is complete, you can immediately configure Hourly Forecast Alerts for your locations. Many users subscribe to multiple iAlert services to meet their needs.
How do I cancel?
Cancel anytime from your iAlert account. The subscription ends at the close of the current billing month and no further charges occur.
Service Summary Guide PDF, what's included Configuration Guide PDF, how to set it up
Pair it with

Other iAlert services you can add.

Ready when you are

Start receiving hourly forecasts for $12.00 per month.

Instant account activation. Cancel anytime from your account.