Rain and Snow Showers for Mid-Atlantic and Northeast; Increasing Fire Weather Concerns for the Plains

A clipper type system will track across the Northeast today, with a stronger system expected for this first weekend of March. Snow accumulations are expected for portions of the Great Lakes region and New England. Winds will also become gusty across most of the eastern two-thirds of the country this weekend. These winds and low humidity may increase fire weather concerns for portions of the Plains Read More >

Lightning Potential Index Header Image

Using the weather.gov/gjt website, you can obtain forecast lightning information year-round. The Lightning Potential Index (LPI) provides graphical guidance for the potential of lightning over a 60 hour period. This looping product will update continuously on a 3 hourly basis as new computer model information becomes available. This information should be used for general planning purposes only and is provided for the National Weather Service Grand Junction area of responsibility (eastern Utah and western Colorado). You are urged to seek out the latest forecast information by visiting WFO Grand Junction. Please see our Lightning Safety Page for more information.

To access the LPI:

First, click on the ‘Forecasts’ section of our website (red arrow below). A drop-down menu will then appear. Click on the 7^th entry from the top (or 2^nd one from the bottom) called ‘Lightning Potential Index (red oval).

From there, you will see the following webpage:

From this page, you can loop the current forecast, stop the loop, and step through each image in the loop.

And at the bottom of the page (or right above this text) you will find the Color Key and Explanation section of the page (or the legend). Think of the LPI as a stop light; Green means go, Yellow exercise caution and Red means stop (or take the day off from climbing that 14er).

If you have any questions on how to use the Lightning Potential Index, don’t hesitate calling us at 970-243-7007 or email us at wxgjt@noaa.gov.

Follow us on X

Follow us on Facebook

Follow us on YouTube

GJT RSS Feed

Rain and Snow Showers for Mid-Atlantic and Northeast; Increasing Fire Weather Concerns for the Plains

Lightning Potential Index Tutorial