Apr 30 2026
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Registration is now open for the 2026 HURREVAC Webinar Series

By HURREVAC Support

Government emergency managers are invited to join us each day from June 15 to June 18, 2026 for our free, live HURREVAC training webinars. New HURREVAC users who have not yet had an opportunity to get training are strongly encouraged to attend. Returning HURREVAC users are also welcome to use this opportunity to refresh their skills and get the latest information about NOAA’s forecast products and services for the 2026 season. >>> Click here to register on GoTo Webinar Each live session will cover a different theme and builds up to a comprehensive virtual training: What to expect All sessions will go live at 2 PM EDT and run for approximately 2 hours. During each of the sessions, the first part will feature a presentation on that day’s topic from subject matter experts, while the second part will focus on demonstrating and applying those concepts in HURREVAC. If you are joining us again, you’ll notice one change from previous years: you only need to fill out one registration form to sign up for all four sessions. We hope you can join us each day so you can interact with us and develop the fullest understanding of the program. But we also know that schedules can be tricky. If you are unable to join the webinar on a particular day, or can’t stay on for the full 2 hours, it won’t count against your overall attendance for the week. As in previous years, we plan to make the webinar recordings available on the HURREVAC YouTube channel (and post presentation slides and recordings on our User Guides and Tutorials page) so you can easily catch up. You can also use those recordings to review the material at a later time or share it with colleagues who are interested in learning the program. Once registered, please plan to join the webinars on a device with a stable internet connection and a screen that is large enough to resolve details of the HURREVAC workspace. We strongly recommend using a laptop or office workstation instead of a phone screen. You may simply watch the webinar, or follow along with the demos in your own HURREVAC account if you have a second screen. HURREVAC training is intended only for government emergency managers in the United States.

Oct 08 2025
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Updates to National Storm Surge Maps and the Conditions tab

By HURREVAC Support

HURREVAC has updated National Storm Surge Hazard Maps (SLOSH MOMs) published by the National Hurricane Center Storm Surge Unit in the fall of 2025. The U.S. Gulf Coast and East Coast were reprocessed to improve spatial resolution and friction effects from land cover. Users can interact with the data in the Storm Surge (SLOSH) Explorer and download the GeoTIFF files from the Resources tab. Learn more about this product on the NHC’s Storm Surge website. Conditions tab enhancements Users can now hold the pointer over the Forecast Rain and Observed Rain layers to display a label over the map for a given color range. The River Gages can now be filtered to exclude sites that are not flooding. Use the Hide No Flooding Gages checkbox to filter out all green points. This option can be used with either forecast or observed water levels.

Jul 10 2025
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New Storm Surge Modeling for the Mid-Atlantic

By HURREVAC Support

Emergency managers in the Mid-Atlantic now have access to updated storm surge modeling in HURREVAC. The National Hurricane Center’s Storm Surge Unit published new SLOSH data for the Chesapeake Bay and Delaware basins in July 2025.  The associated high-resolution MEOWs are available in HURREVAC’s Storm Surge (SLOSH) Explorer to help users understand their storm surge risk for both planning and operational decision-making. The Chesapeake Bay basin, identified as cp6, is intended for use between the Virginia-North Carolina border and Maryland-Delaware border, including all of Virginia, Maryland, the District of Columbia, and some western portions of Delaware. This replaced the cp5 SLOSH data throughout the Chesapeake Bay region. The Delaware basin, identified as de4, is intended for use between the Maryland-Delaware border and Sandy Hook, New Jersey, including most of Delaware, the Philadelphia area, and the southern two-thirds of New Jersey. Refer to the latest basin outlines on the accompanying map to see which data set is most appropriate for use in your area of interest. The SLOSH basin outlines are also available in HURREVAC’s Resources tab and referenced whenever a user defines their base location in the program. Questions pertaining to the new SLOSH data should be directed to Cody.Fritz@noaa.gov at the National Hurricane Center. General questions about storm surge tools in HURREVAC should be directed to support@hurrevac.com. New shortcut to generate Evacuation Timing Report HURREVAC can now save users a few clicks when they are ready to evaluate protective actions along with the latest forecast data. ● First, make sure that your storm of interest is plotted on the tracking map. ● In the Evacuation Timing window, enter your Evacuation Scenarios and/or custom Timeline Actions. ● Then, click the new Create Report button in the lower right portion of the window. This instantly opens the right side panel and generates an Evacuation Timing Report. The report is the same as before, and lists results for all stored evacuation scenarios and timeline actions for areas with valid wind timing data. In other words, it is not necessary to select specific scenarios or actions to populate the report. HURREVAC incorporates extension of NHC/CPHC hurricane-force wind radii forecasts to day 3 As announced in NHC’s product updates for 2025, the Forecast Advisory (TCM) now includes a prediction of the extent of hurricane-force winds out to day 3. Previously, the forecasts for that 74 mph threshold were issued out to day 2 and extrapolated to day 3 in HURREVAC when applicable. This new information is used when drawing HURREVAC’s map layers (Forecast Wind Field, Wind Swath – Deterministic) and the Deterministic Wind Timing Report. As in years past, the size and shape and timing of the hurricane wind field (red) is not depicted beyond three days for systems in the Atlantic, eastern Pacific and central Pacific, even if the track forecast indicates a hurricane four or five days into the future. Wind radii forecasts are available up to five days beyond the advisory time for the tropical storm (blue) and strong tropical storm (yellow) thresholds. For storms tracked by the JTWC, 64 kt (typhoon or cyclone) winds are explicitly forecast out to five days and shown on the map when applicable.

May 09 2025
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UPDATE: Join us in July for the 2025 HURREVAC webinar series

By HURREVAC Support

SCHEDULE UPDATE: The 2025 HURREVAC Webinar Series will now take place from July 28 to July 31 due to unavoidable scheduling conflicts with the original May dates. In the meantime, we encourage users to take advantage of our new Quick Guide to HURREVAC videos and in-app training modules. Registration is open for the National Hurricane Program’s free annual HURREVAC webinar series. Government emergency managers are invited to join us each day from July 28 to July 31, 2025. New HURREVAC users who have not yet had an opportunity to get comprehensive training are strongly encouraged to attend. Returning HURREVAC users are also welcome to use this opportunity to refresh their skills and get the latest information about NOAA’s forecast products and services for the 2025 season. The four sessions will focus on these themes: You must register for each day you plan to attend. What to expect All sessions will go live at 2 PM EDT and run for approximately 2 hours. The first half of each session will be devoted to a presentation of hurricane-related concepts and walk-through of related tools in HURREVAC. After a short break, the second half of each session will be devoted to applied demonstrations and exercises. Follow the links in the list above to find more details about the topics that will be covered each day. This arrangement is intended to build concepts gradually through the course of the week, while mixing in opportunities to practice skills and ask questions. FAQ Please plan to join the webinars on a device with a stable internet connection and a screen that is large enough to resolve details of the HURREVAC workspace. We strongly recommend using a laptop or office workstation instead of a phone screen. You may simply watch the webinar, or follow along with the demos in your own HURREVAC account if you have a second screen. For those who are unable to attend the webinars (partially or entirely), or would like to review the material at a later time, recordings of each session will also be posted to the HURREVAC YouTube channel prior to the start of the next day’s session.

May 02 2025
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May 2025 updates

By HURREVAC Support

Improved opacity controls for evacuation zones When evacuation zones are turned on in HURREVAC, there are now two buttons on the opacity slider in Quick Layers Options: one for the fill and one for the boundary. By default, the fill is set at 50% opacity and the boundary is set at 20% opacity. Depending on what you are trying to analyze or display, it may be beneficial to adjust these levels. Below is a hypothetical example where we compare the storm surge inundation hazard alongside evacuation zones to help us consider which areas may need to evacuate. The zone outlines were made more prominent (100%) while the zone fill was adjusted to be more transparent (25%). This example also made the MEOW Surge brighter (100%) and layered it over the zones. But depending on the complexity of the outlines and default colors of the zones you are working with, other opacity and layering choices may work better. Note that changes made in Quick Layers are temporary (not associated with your user settings) so it is necessary to make opacity adjustments each time you use HURREVAC. Storm Simulator wind probabilities discontinued The experimental step that generated downstream wind products was discontinued on May 1, 2025 due to resource constraints. The removal of this optional step does not affect the rest of Storm Simulator. In other words, it is still possible to make a simulated storm track and forecast, just without map layers for wind probabilities or wind watches and warnings. All simulated storms with associated wind products that were saved prior to May 1, 2025, are still available.