Weather Alerts & Monitoring

Western Weather Group Hotline (707) 847-5245

Frost Forecasts will begin March 10th with morning and evening forecasts.

Western Weather Mobile Page

View this page while using your smartphone for a quick regional check of temps on frosty mornings; view a condensed latest observation of all the Sonoma County stations on WWG network in real-time (Temp, wind, rain); view the forecast in text; view satellite and radar images on it.

New topics to the morning Sonoma County agricultural weather forecasts include:

  1. Evapotranspiration forecast
  2. Grape Powdery Mildew forecast
  3. Degree-Day Analysis (comparing 2010, 2011 and 2012)

Western Weather Mobile Alert Monitoring System

The Sonoma County Winegrape Commission and Western Weather Group have teamed up to provide a new Mobile Alert Monitoring Service that allows you to receive alerts based on weather parameters observed by automated weather stations in Sonoma County. The user selects the station(s) and sets the alert parameter(s) on a password protected web page. Alerts are sent via email and/or text message and can be sent to multiple people within your organization. Near-real time data from the automated weather stations can be viewed on your Smart Phone or PC.

Frost Protection

Weather alerts can keep growers apprised of critical changes in the weather during the frost season. Growers receive e-mail or text messages to their cell phones when alarm setting are triggered. This service is ideal if you need to know when the temperature reached 36°F, the winds are over 5 mph or dew points are below 32F. Alarms reset after 8 hours, therefore multiple alarm setting are required to follow changes throughout the night, e.g. temperatures at 36F, 34F and 32F. Set alarms for the Sonoma County weather station nearby your vineyard.

To request a username and password to use the Mobile Alert Monitoring Service contact Western Weather at

Western Weather Group Email Subscription

Fill out this form if you would like to receive daily and/or weekly forecasts from Western Weather Group via email. Please be sure to add to your “Safe Senders List” to ensure the forecasts reach your inbox.

To unsubscribe to this e-mail service: send an unsubscribe request e-mail to and specify whether you are receiving in pdf file format or on a smart phone.

    If you receive e-mail on a computer, the pdf version will provide the most extensive forecast. If you receive e-mail on a smart phone, the HTML version is abbreviated and will be more appropriate.