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A residential rooftop and ladder under an approaching dark hail shelf cloud, the last sunlight on the shingles

ROOFING · HAIL ALERT FOR ROOFING CONTRACTORS

Hail prediction for roofing contractors: know which streets get hit before the storm arrives.

Predictive Hail predicts hail up to 55 minutes before it reaches a site, on 1×1 km cells refreshed every five minutes with timing down to the minute. Crews come off the roof before the cell arrives, canvassers work only the streets that were hit, and adjusters get a timestamped cell-level record for every claim.

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Predictive Hail · 1-hour hail swath prediction · timing down to the minute · no sensors required for the forecast

55 min

hail warning before it reaches the neighborhood, up to

  • CLASS 1severe
  • CLASS 2damaging
  • CLASS 3destructive

ILLUSTRATIVE EXAMPLE · NOT LIVE WEATHER

Skye · ask in plain language

Ask the question your crew actually asks.

Pick your industry. Skye, Flash Weather's AI weather agent, answers from the same 1×1 km forecast, refreshed as often as every two minutes, then acts in the tools you already run.

SKYE can connect to your CRM and ERP.

Your tools and data

Sites, limits, schedules

CRM · ERP · Procore · Slack

Prediction engine

15+ forecasts, 1×1 km

Lightning every 2 min, hail every 5

Power
Skye, the Flash Weather agent

Skye

Combines both, answers in plain language, proposes the action.

Answers

You and your crew

Ask in plain language

Get the answer in seconds

You decide

Your decision

  • Go / No-go
  • Reschedule
  • Alert the crew
Pick your industry

Questions crews ask

Illustrative example · not live weather

Three ways hail costs a roofer, and what a warning of up to 55 minutes changes

Hail is the roofer’s biggest revenue event and its biggest liability in the same afternoon. Flash treats it as three separate problems with three separate outputs.

ILLUSTRATIVE EXAMPLE · NOT LIVE WEATHER

  • A half-torn-off residential shingle roof with a ladder and tarps over the open deck while a dark hail shelf cloud builds low overhead

    01 · PRODUCTION

    Land the crew before the cell arrives

    Crews on a roof when the cell arrives

    A crew on a steep-slope job cannot get down in the moments a detection horn gives them. Flash’s lightning prediction gives up to 60 minutes, and the hail pull-off alert fires up to 55 minutes before the cell reaches the address, so the foreman lands the crew, covers the open deck and moves the trucks.

    Alert: SMS, mobile push and horn integration · lightning and hail

  • An elevated view along a suburban street of shingle rooftops under a bruised green-grey hail sky, wet asphalt catching the last light

    02 · SALES

    Knock the blocks that actually took stones

    Wasted canvassing on streets that never got hit

    Storm-restoration sales teams knock the whole ZIP because nobody can tell which blocks took damaging stones and which took rain. The swath report resolves the storm to 1×1 km cells with a predicted size class for each, so canvassers start on the streets most likely to have fractured shingles.

    Output: 1×1 km swath report, PDF and PNG, ready soon after impact

  • Hailstones scattered across a bruised asphalt shingle roof and collected in a metal gutter after a storm

    03 · CLAIMS

    Attach the storm record, not a memory

    Disputed claims with no record of the storm

    Adjusters ask when the hail fell, where, and how big it was. Flash keeps a timestamped, cell-level hail record for every address in the swath, refreshed every five minutes through the event, that you attach to the claim file instead of arguing from memory.

    Record: date, time, 1×1 km cell, size class, model run

What a storm day looks like with up to 55 minutes of hail warning

Times are relative to hail reaching the Elm Street job. Every step below is an alert or an export Flash produces on its own; nobody on your team has to sit and watch radar.

ILLUSTRATIVE EXAMPLE · NOT LIVE WEATHER

  1. Predictive Hail flags a cell tracking toward the Elm Street job, predicted size class ≥1.00 in. Alert to the production manager and the foreman.

  2. The foreman lands the crew, tarps the open deck and moves both trucks off the street. The pull-off is logged with a timestamp.

  3. Two canvassers park at the predicted edge of the swath with the forecast cell map open on their phones.

  4. Hail reaches Elm Street. Predictive Hail records the observed size class per 1×1 km cell as the storm crosses the metro, every five minutes.

  5. PDF and PNG with 1×1 km cells, size class and timestamps, exported from the web app for the sales team and the claims file.

  6. Streets ranked by predicted size class, largest first. The team knocks the ≥2.00 in cells before the out-of-town crews arrive.

What each hail size class does to a roof, and what Flash sends

Predictive Hail predicts three size classes per 1×1 km cell. Each one maps to a different alert, a different recipient and a different line in the swath report.

ILLUSTRATIVE EXAMPLE · NOT LIVE WEATHER

Roof cross-section

≥1.00 in Damaging

What ≥1.00 in Damaging hail does to the roof:
  1. Shingles fractured, mat exposed
  2. Vent cap cracked
  3. Pipe boot cracked
SIZE CLASSWHAT IT DOES TO THE ROOFWHAT FLASH SENDS
Granule loss and bruising on asphalt shingles; soft-metal dents on vents, gutters and turtle caps. Usually invisible from the street.Hail Watch to production and sales. The cell shows as class 1 on the swath map and the canvassing list marks the street “inspect”.
  • Hail Watch
  • Swath map · class 1
  • Canvassing list
Shingle fracture and mat exposure; cracked vent caps, pipe boots and ridge caps.Hail Warning with the pull-off alert to every crew on a roof in the cell; the horn integration fires. Class 2 in the swath report with timestamps for the adjuster.
  • Hail Warning
  • Crew pull-off
  • Horn
  • Swath report · class 2
Decking punctures, broken skylights and damaged flashing; tile and slate breakage; interior water damage within hours.Same Warning, plus a priority flag on the canvassing list. The adjuster record carries the full size-class time series for the cell, every five minutes.
  • Hail Warning
  • Priority flag
  • Adjuster record

Size classes are Predictive Hail’s three thresholds. Hail model refreshed every five minutes, built on four years of convective storm data across the CONUS (2021 through 2024); coverage is the continental U.S.

The swath report: which streets took what, cell by cell

Once the storm has crossed the metro the report is ready in the web app: every 1×1 km cell coloured by predicted size class, with the time the hail crossed it. Sales uses it to rank streets; claims attaches it to the file.

Report generated 17:42 · after the storm cleared

ILLUSTRATIVE EXAMPLE · NOT LIVE WEATHER

NEXT AM · CANVASSING LIST

Top 5 streets by max hail size

  1. 1Oak Stknock first2.50 in
  2. 2Elm Stknock first2.25 in
  3. 3Peachtree Rdknock first2.00 in
  4. 4Poplar Avefull inspections1.75 in
  5. 5Hickory Ctfull inspections1.75 in

60 minlightning lead time for roof crews, up to

  • Hail warning · up to 55 min
  • Lightning warning · up to 60 min
The Flash mobile app on a phone showing the lightning prediction alert a roofing foreman receives on site

FLASH MOBILE APP

Lightning for crews on the roof, not just hail for the sales team

FirstStrike’s strike-level prediction, refreshed every 2 minutes, reaches the foreman by SMS and mobile push and fires the yard horn integration. The crew is off the roof before the first strike, not after it. Accuracy is up to 99.6% on a one-hour prediction window; the accuracy method page has the detail.

See lightning prediction

FEATURES & PODCASTS

Hail prediction, in the roofing trade’s own media: the trade coverage, the podcast and the community feature.

A row of contractor pickup trucks and parked cars on a lot beneath a bruised hail sky as the first stones bounce off the asphalt

Trucks and equipment moved before impact

All coverage on press & partners →

In the field

What do the people running the sites say?

The people making the call are outside, with a sky like this over them.

  • Flash Weather quote card: Will Gamble, Infinity Roofing, “It was more accurate than all the other hail maps. Flash AI was pretty spot-on,” over a photo of a roofer measuring shingles

    “Flash AI is one of the greatest technologies I’ve seen in a while. It’s more accurate than any other hail map. I stand behind it 100%. This is a game-changer for the industry.”

    RoofingWill GambleInfinity Roofing

Who brings Flash into roofing, and why

The titles that make the call, the problem they describe on the first conversation, and where they gather.

Who buys

  • CEO
  • President
  • Director of Operations
  • Director of Sales
  • Director of Technology or Innovation
  • Key Account Manager
  • National Accounts Manager

The problem on the first call

  • Hail: finding and booking the damaged addresses first, with hail history to back up the claim.
  • Lightning and heat for roof crews and jobsite management.
  • Rain forecasting for scheduling and jobsite management.
  • Frost prediction for roofs that are not walkable or safe to be on.

Where these buyers gather

  • International Roofing Expo
  • Win the Storm
  • Western Roofing Expo
  • Midwest Roofing Contractors Association
  • National Roofing Contractors Association

Questions roofing owners, operations and sales leaders ask about hail alerts

Yes. Predictive Hail predicts a size class for each 1×1 km cell, severe, damaging or destructive, and records the observed class as the storm passes, every five minutes. Alerts and the swath report carry the class, not a vague “hail possible”.

Yes. The swath report exports as PDF and PNG with the cell, the size class and the timestamp for every address in the event. The adjuster gets the same record you do.

Up to 55 minutes before hail reaches a site, refreshed every five minutes with timing down to the minute. Lightning is predicted up to 60 minutes ahead on the same 1×1 km cells, refreshed every 2 minutes, with a 5-hour lightning probability for the day.

No. Flash is software: web app, mobile app, SMS, email and horn integrations. Register the yard, the active jobs and the canvassing territories as sites and the alerts follow them.

Yes. Coverage is the full continental U.S. at 1×1 km resolution, so a storm-restoration territory spanning several counties is a few hundred cells on one map.

Next for a roofing owner

The two products on this page, the competitor comparison, pricing and one customer story.

Keep reading

Book a demo · No sensors required for the forecast

See your own sites on the map before the next storm.

We'll load your locations, replay last season's strikes against Flash's predictions, and show you the alert log your safety officer would have received.

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