Please read the documentation to get the best use out of WarnUS. NOTE: This link can also be found at the bottom of the page. A link to the WarnUS help page can also be found at the bottom of the page or here
August 3rd, 2024: The mapping interface has been updated as the old interface is no longer supported.
February 5th, 2024: WarnUS can now retrieve Day 1 excessive rainfall outlooks from the Weather Prediction Center and display that information on the full map.
July 1st, 2021: WarnUS now has the ability to automatically retrieve and plot tropical cyclones covered by the National Hurricane Center. Click on "Show Full Map" to view these products. Also, the National Weather Service has been extensively modifying their web servers. While this is ongoing, some products shown on this webpage may experience disruptions.
February 5th, 2021: WarnUS now has the ability to automatically retrieve and plot convective outlooks, mesoscale discussions, and storm reports from the Storm Prediction
Center website. Click on "Show Full Map" to view these products. Learn More
IMPORTANT NOTE: The current external source for mesoscale discussions may exhibit odd behavior when multiple discussions are in effect. Worst case scenario, only the most recent mesoscale discussion that is active will appear. All other Storm Prediction Center features should function on WarnUS as intended.
October 25, 2019: The National Weather Service's flash flood warnings are currently transitioning to a new impact-based format. As such, some flash flood warnings may not display correctly.
March 12, 2019: Various graphical displays for WarnUS have been polished and retouched to be more visually appealing.
December 24, 2018: The WarnUS user interface has been redone. If you prefer the old page, click here.
April 16, 2018: Users can now receive notifications for warnings affecting specific geographic points. See the tutorial page for more information.
November 21, 2017: Users now have the option of hearing warnings read aloud. Click on a warning and then click on the sound icon or click on the "Speak Alerts On Loop" button.
Data obtained from the United States National Weather Service
Problem with this site? Suggestions for improvement? Please email ContactWarnUS@gmail.com
Click here to view the full documentation of this site, including version history, terms of use, and other miscellaneous information. Click here to view the WarnUS Help Page.
Click on a map feature to get more information about it
Show Points of Interest on Map
Show Tornado Warnings on Map
Show Severe Thunderstorm Warnings on Map
Show Flash Flood Warnings on Map
Show Storm Tracks on Map
Show Tropical Cyclones on Map
Show NHC Forecast Tracks on Map
Show Mesoscale Discussions on Map
Show Convective Watches on Map
Show Today's Storm Reports on Map
Show Outlook on Map
NThe above plot represents the speed and direction for each storm. Each individual line points in the direction of motion while the length of the line indicates the storm speed (longer lines indicate faster speeds). The faded lines show each individual storm while the bright line shows the mean (average) motion.
Multiple map features were clicked, please select one:
WarnUS displays information on short-term warnings (namely, tornado warnings, severe thunderstorm warnings, and flash flood warnings) in a concise manner. WarnUS can also sound an audible alert when new warnings are issued, and you can choose whether you want to receive alerts nationally or from a specific forecast office. With the proper setting enabled, you can also click on a warning to display the full text if you would like to know more details about that particular warning.
My reasons for creating WarnUS are numerous, so I'll only state the most significant. Something I do on active weather days is monitoring watches and warnings issued across the nation. I did this through use of the National Weather Service's website. However, I often had to manually refresh pages to get the latest warning information. Furthermore, it would have been nice to have some sort of audio or visual cue that a new warning was issued incase my attention was elsewhere. WarnUS automatically checks for new warnings and statements and can sound an audio alert when new warnings and statements are issued.
The script that runs WarnUS was designed to be as efficient as possible to allow for prolonged mobile use. On my own laptop, the operating system suggested (on a full battery) WarnUS could run for as long as 8 to 12 hours before the battery would die. If your battery is running low or the situation is relatively calm, you can set the updating interval to be less frequent (2 to 5 minutes, e.g.). You can also narrow down the warning data to a specific NWS forecast office so there is less data to process.
WarnUS is in compliance with the National Weather Service's Terms Of Use. If you discover a problem with WarnUS or have a suggestion to improve it, please email ContactWarnUS@gmail.com
About
Help Page
Home
