Question 1

What is a hail map for roofers?

Accepted Answer

A hail map helps a roofing team review where hail was reported or estimated, how large it may have been, and when the storm occurred. Contractors use that weather context to decide which areas deserve a closer look and plan field follow-up.

Question 2

How much does THOR Storm Mapper cost?

Accepted Answer

THOR costs $34 per month after a 14-day free trial. The trial does not require a credit card. One subscription covers all 50 states, and there is no annual contract or per-state fee.

Question 3

What is the difference between a free hail map and THOR?

Accepted Answer

A free hail map can be enough for an occasional lookup. THOR adds replay, swaths, impact views, property reports, exports, alerts, and built-in canvassing with lead import, map pins, dispositions, call/drive actions, Storm Hits, and monitoring.

Question 4

How fresh is the storm data in THOR?

Accepted Answer

THOR reads public NOAA and Storm Prediction Center reports as those sources publish them. Reports can be added, corrected, or finalized after the storm, and THOR keeps that evolving record together in one map.

Question 5

Can I export THOR storm data to a spreadsheet or mapping tool?

Accepted Answer

Yes. Choose a state and apply the storm-type, severity, and time filters you need, then export the matching events as CSV or KML. Standard CSV and KML files can be used in tools that support those formats.

Question 6

Does THOR cover the whole United States?

Accepted Answer

Yes. The interactive hail, tornado, and wind map covers all 50 states under the same subscription. Public state and city hail pages are also available for quick recent-storm research.

Question 7

How do roofing teams use THOR after a storm?

Accepted Answer

A team can review reports and swaths, replay radar for the storm window, narrow the area by severity and market context, check existing leads for qualifying storm hits, export the selected events, and generate nearby property-history reports before planning field inspections.

Question 8

What do the Market Priority Census filters mean?

Accepted Answer

Market Priority does not change the storm data or run a new weather search. It ranks the storm events already loaded on your map by Census residential context. Households favors Census areas with the largest household count. Residential Density favors areas with more households packed into a smaller area. Population ranks by total residents. Residential Score combines household count, household density, and housing units into one residential-opportunity score. The Top 50%, 25%, and 10% controls determine how narrowly THOR filters the current results: use 50% for a broader market view and 25% or 10% for a tighter priority list.

Question 9

How do I view the actual hail swaths after a normal Detection Controls scan?

Accepted Answer

You do not need Historical Hail Search. After a normal scan, open Map View & Layers, select Timeline, then select SWATHS in the Timeline bar. Zoom into the market to render the layer. NOW shows swaths overlapping the current Timeline position. CUMULATIVE shows swaths from the start of the selected Timeline range through the current position. SHOW ALL moves Timeline to the end in Cumulative mode so you can see all currently loaded swaths for the scanned period at once. If you see storm path lines instead, turn off TRACKS: Tracks show the storm-cell route, while SWATHS show the radar-derived hail footprint.

Question 10

Why are hail swaths tied to outbreaks or Timeline instead of showing everywhere at once?

Accepted Answer

THOR intentionally scopes swaths so the map stays readable and responsive. Selecting an outbreak automatically loads the radar-derived hail footprint for that outbreak’s own storm area and time window. Timeline gives you NOW, CUMULATIVE, and SHOW ALL views for a normal scan. Drawing every available swath across a broad multi-day or multi-state search at once would create overlapping footprints that obscure the map and slow it down. Historical Hail Search helps find an older date or address, but it is not a separate swath-display mode. If no usable radar-derived hail signature exists for the selected outbreak or Timeline window, THOR will say so rather than draw a misleading footprint.

Hail map questions from roofing teams