Welcome to the IEM Local Storm Report (LSR) App! The
old version of this app is still available for
use, but this new version is the way forward. It is built using
modern web technologies and is designed to be mobile friendly.
Please provide feedback on
this app. It is a work in progress and your input is valuable.
This app displays National Weather Service (NWS) Local Storm Reports
(LSR)s for a given time period of your choice. Additionally, NWS
Storm Based Warnings (SBW) are also displayed for events
Issued between the start and end time of your
choice.
Web Services
This app uses to main GeoJSON web services to provide the data
displayed here. LSR and
SBW. You are
welcome to use these services in your own applications.
URL Parameters
You can use the following URL parameters to customize your experience:
by: Filter by either "wfo" (default) or "state".
wfo: Comma-separated list of WFOs to filter by.
state: Comma-separated list of states to filter by.
seconds: Puts the app into an auto-refreshing
mode that loads the previous number of seconds worth of LSRs
and warnings issued.
Changelog
2025-05-22: Added a scale control for
Storm Based Warnings polygon outline width. You can find this
within the Settings tab.
2025-05-22: Changed SBW polygon plotting
priority to show Tornado then Severe Thunderstorm Warnings
then others.