How to Publish Your Spring Tornado and Severe Weather Forecasts Online

The Spring Prediction Center has issued an Enhanced Risk. The models are screaming. You've been watching the hodograph loop, the 0–1km SRH is through the roof, and you're confident the corridor from Wichita to Tulsa is going to see significant tornadoes.

You want to tell people. But how?

If you're posting a model screenshot with a text caption to Facebook, you're leaving a lot on the table. If you're writing a Substack post, you're explaining your forecast in words when it would be better shown on a map. And either way, you have no way to look back after the outbreak and prove what you said before it happened.

Here's the workflow that indie forecasters are using in 2026 to publish tornado risk zone forecasts with interactive maps — and verify them when the storm reports come in.

Why Tornado Forecasts Are Harder to Share Than They Look

Every forecaster knows the SPC categorical risk scale — Marginal, Slight, Enhanced, Moderate, High. But when you're publishing your own forecast, you're not just copying SPC's outlook. You're going deeper. You might be saying:

"I think the High Risk polygon is too far east — the real tornado corridor is from OKC to Joplin, not eastern Kansas."
"SPC has Enhanced, but given the 850mb temps and dewpoints, I'm calling this Moderate with a 10% tornado hat."
"The southern extent of the warm sector is being undercut by an MCS overnight — I'd narrow this polygon significantly."

That's real forecasting value. But if you're just screenshotting SPC's outlook and adding a caption, your independent analysis is invisible. You need a way to draw your own risk zones, assign your own probability estimates, and put that forecast on record before the event.

How ForecasterHQ's Storm Forecast Type Works for Severe Weather

ForecasterHQ's storm forecast format was designed for exactly this use case. Here's the workflow:

Step 1: Create a Storm Forecast

In ForecasterHQ's create wizard, choose Storm Forecast as your forecast type. This unlocks the accumulation range fields — originally built for snowfall, but equally applicable to tornado probability percentages or categorical risk labels.

Set your event window: the date and time range when the outbreak is expected. This timestamp becomes the anchor for verification — when the event ends, ForecasterHQ can pull storm reports against your predictions.

Step 2: Draw Your Risk Zones

The map editor lets you draw free-form polygon regions covering your risk areas. This is where your forecast diverges from SPC's. Examples:

Tornado Risk Zone (High, 30%) — draw the corridor you believe has the highest tornado probability, assign a label
Tornado Risk Zone (Enhanced, 15%) — the broader surrounding area
Wind / Hail Threat Zone — a secondary region for non-tornado severe

Each region gets a label, a color, and optionally an accumulation range. For severe weather, use the range fields for tornado probability percentages (e.g., min: 10%, max: 30%) or wind gust ranges (e.g., 60–80 mph for wind events).

Step 3: Publish and Share

Once your regions are drawn and you're satisfied with the forecast, hit Publish. You get a shareable URL with your map, your timing, and your risk zones on record. Share that URL on Twitter/X, Facebook groups, or your email list — not a screenshot, but a live interactive forecast that anyone can zoom into.

The URL is timestamped. There's no editing the published forecast. Your pre-event call is on record.

Step 4: Verify After the Event

When your event window closes, ForecasterHQ automatically pulls IEM Local Storm Reports (LSRs) for the storm. Tornado reports, wind damage reports, and hail reports are plotted as points on your map alongside your original risk zones.

Did your High Risk polygon overlap with the actual tornado track? Did your Enhanced zone underperform? The verification display shows you — and more importantly, shows your audience. This is what builds a track record.

What to Put in Your Tornado Forecast Regions

Unlike snowfall (where the accumulation range is straightforward), severe weather forecasts benefit from a few naming conventions that make your regions readable:

Label by probability: "15% Tornado" or "SIG (30%+ Tornado)" — mirrors SPC language your audience recognizes
Label by type: "Tornado Corridor," "Hail/Wind Risk," "Low-End Tornado Possible" — clearer for a general audience
Label by geography: "OKC Metro Corridor," "I-44 to I-40 Risk Zone" — resonates with local audiences

Whatever convention you choose, be consistent. Your audience will learn your system.

Publishing Timing: The Pre-Event Window Matters

For spring severe weather, the publication timing window is tight. The highest-value publish is:

36–48 hours before the event: SPC has issued a Day 2 Enhanced or Moderate risk. You publish your own risk-zone breakdown, explaining how your analysis differs from SPC's positioning.
Day-of, morning: SPC's Day 1 Categorical is updated. Publish an update to your risk zones with any shifts.
Within 2 hours of outlook update: If SPC upgrades to High Risk, publish your own take on the exact tornado corridor.

Timing matters because post-event interest is intense. When a significant outbreak occurs, anyone who searches "who predicted this tornado" is looking for forecasters who had the region marked before the outbreak, not after. Pre-event publication is your credibility proof.

How to Link Back to Your Forecast After the Storm

One thing many forecasters miss: after a major outbreak, search volume spikes for event-specific terms. "April 2026 tornado outbreak forecast" is going to get searched thousands of times in the 48 hours after the event.

Your pre-event ForecasterHQ forecast is your evidence. Share the link post-event with a caption like: "Here's what I published 36 hours before the outbreak — my risk zone overlapped with 8 of the 12 confirmed tornado tracks." That post-event comparison is the highest-conversion content indie forecasters can produce during spring storm season.

For a guide to the verification workflow in detail, see the Storm Forecast Verification Tool guide.

Linking Your Severe Weather Workflow

The storm forecast format is one piece of a larger workflow that the best spring severe weather forecasters are building:

Pre-season: Read the SPC Outlook Interpretation Guide for indie forecasters to understand how to read the tools SPC uses.
Before each event: Publish your forecast on ForecasterHQ with drawn risk zones.
During the event: Post updates to social linking back to your ForecasterHQ forecast page.
After the event: Verify against storm reports. Share the comparison.
Over the season: Build a public track record that spans the entire tornado season — not just individual events.

For the full picture of how to set up your publishing infrastructure, start with How to Publish a Weather Forecast Online. For more on the severe weather publishing workflow specifically, see How to Publish a Severe Weather Forecast Online.

Spring storm season doesn't wait. The first major Enhanced Risk day of April may only be days away. If you haven't published a pre-event forecast on ForecasterHQ before then, you're missing the highest-traffic weather content window of the year.

Draw your risk zones. Put your analysis on record. Verify against what actually happened.

That's how you build a reputation in this space.