The LSR Request Form
offers more download options. The buttons below are for quick access.
WFO
Time
Type
Magnitude
City
County
State
The WaWA Request Form
offers more download options. The buttons below are for quick access.
WFO
Phenomena
Significance
Event ID
Issue
Expire
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.
settings: This is crude sequence of 0 (off)
and 1 (on) values that control the following settings:
NEXRAD Reflectivity Visibility
Local Storm Reports Visibility
Storm Based Warnings Visibility
Is the app in real-time / auto refreshing mode
States Layer Visibility
Counties Layer Visibility
LSR Label Mode (Icons [0] vs Magnitude [1])
Changelog
2026-06-11: Added "Draw to Count" button that allows
users to draw a rectangle on the map and count the number of
visible LSRs and SBWs that intersect that polygon.
2025-07-21: Added an option to filter LSRs
by their magnitude.
2025-06-06: Fixed a bug with sorting of
timestamp values in the LSR/SBW tables.
2025-05-27: Fixed a bug where the LSR
type filter would remove all LSRs.
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.