Ham Radio in Severe Weather: Skywarn Spotting and Storm Communication

At 4:37 PM on a Tuesday last May, the National Weather Service office in Norman, Oklahoma issued a tornado warning for Cleveland County based partly on radar velocity data and partly on a ground-truth report from a trained Skywarn spotter — a ham radio operator positioned three miles south of Moore who transmitted: "Net control, this is [callsign], I have a confirmed wall cloud with visible rotation, moving northeast, latitude 35.31, longitude negative 97.48." That report, relayed through the local 2-meter repeater net to the NWS, helped narrow the warning polygon by two miles, giving residents in the direct path an extra four minutes of lead time.

Four minutes. That's lives.

This is what Skywarn does, and amateur radio is the backbone of how it works.

What Skywarn Actually Is

Skywarn is a volunteer program run by the National Weather Service. Trained spotters observe severe weather conditions and report them to their local NWS forecast office. The program has existed since the 1970s, long before Doppler radar could detect rotation within storms.

Here's a fact that surprises people: radar can tell you a lot, but it can't tell you everything. Radar sees reflectivity and velocity at altitude. It cannot see ground-level phenomena like a funnel touching down, hail size on the ground, or flash flooding depth. Spotters fill that gap.

Skywarn is NOT storm chasing. Spotters are trained to observe from a safe, stationary position and report what they see. No one is asking you to drive into a supercell.

How Ham Radio Fits In

When severe weather threatens, local NWS offices activate Skywarn nets on designated amateur radio frequencies. The structure is straightforward:

1. NWS issues a severe weather watch or warning
2. Local ARES/RACES group (or dedicated Skywarn net) activates
3. Net control station (often at the NWS office or Emergency Management) opens the net on a designated repeater
4. Trained spotters in the field check in and begin reporting observations
5. Net control relays reports to NWS meteorologists in real-time

The reporting happens primarily on VHF (2 meters, 144-148 MHz) via local repeaters, though some areas use UHF (70cm, 420-450 MHz) or even HF when the severe weather covers a large geographic area. The key advantage of amateur radio over cell phones: repeaters work when cell towers are overloaded or destroyed. During a tornado, cell circuits jam within seconds. The repeater keeps working.

Getting Trained

Skywarn training is free and open to anyone — you don't even need a ham license to take the class (though you need one to transmit reports over amateur radio).

Basic Skywarn Training

The NWS offers basic spotter training annually, usually in late winter or early spring before severe weather season. Since COVID, most offices offer both in-person and virtual options.

The class covers:

• Thunderstorm structure and types (single cell, multi-cell, supercell)
• Visual identification of severe weather features (wall clouds, funnel clouds, shelf clouds)
• Hail estimation techniques
• Wind speed estimation from damage indicators
• What to report and how to report it
• Safety and positioning

The class runs about 2-3 hours. You get a Skywarn spotter ID number at the end. That's it. No test, no ongoing requirements, though refresher training is recommended every two years.

Find your local training schedule at weather.gov/skywarn.

Advanced Training

Some NWS offices offer advanced classes covering storm structure in more depth, radar interpretation, and reporting protocols specific to your local area. Worth taking if you're serious about spotting.

What to Report (And What Not To)

NWS meteorologists need specific, actionable information. Trained spotters report:

• Tornado or funnel cloud: Direction of movement, estimated distance, whether touching ground
• Wall cloud: Presence, persistence (lasting more than 10-15 minutes is significant), rotation
• Hail: Size (measured, not estimated by comparison to quarters/golf balls — use a ruler), duration
• Wind damage: What happened (trees down, roof damage, power lines down), not estimated speed
• Flooding: Water depth over roadways, structures affected, whether water is rising
• Snow/ice: Accumulation rates, visibility distances

What you DON'T report: lightning (they can see that on radar), light rain, "it's getting dark and windy" (that's normal thunderstorm activity), or your opinion about what the storm might do.

I made this mistake during my first activation. Checked into the net and reported "heavy rain and wind, looks like it could get worse." Net control politely said "copy, any specific observations to report?" Translation: don't waste net time with non-actionable information. Lesson learned.

Net Operations During Severe Weather

Skywarn nets run differently from casual amateur radio nets. They're tight, disciplined, and efficient.

Net Discipline

• Keep transmissions under 30 seconds
• Use the reporting format your local net specifies (location → observation → movement)
• Don't check in just to check in — only if you have something to report or are in a useful position
• Acknowledge net control instructions immediately
• Stay off the frequency unless called or reporting

The net control station manages all traffic. If the net is "directed" (most Skywarn nets are), you do not transmit unless net control calls you or you have priority traffic.

Priority Levels

Most nets use a priority system:

1. Tornado on the ground — Break in immediately, any time
2. Funnel cloud / rotation — High priority, break after current transmission
3. Hail, damaging wind, flooding — Report when called or during check-in rounds
4. Routine observations — Only when net control solicits reports from your area

If you see a tornado, you break the net. Don't wait for your turn. Key up and say your callsign and "priority traffic" or "tornado report." Net control will stop everything.

Equipment for Skywarn Operations

You don't need much.

Minimum Setup

• 2m/70cm FM transceiver (handheld or mobile)
• Decent antenna (the rubber duck on an HT is marginal from inside a car — a mag-mount quarter-wave on the roof makes a huge difference)
• Fully charged battery or vehicle power
• Your Skywarn spotter ID number
• Knowledge of the local Skywarn repeater frequencies

Better Setup

• Mobile rig (50W output vs. 5W from an HT) for reliable repeater access from the field
• GPS for accurate position reporting (most phones work for this)
• Weather radio for NWS alerts
• Flashlight, rain gear, and a way to measure hail (small ruler in the glovebox)

My Kit

I keep a dedicated Skywarn bag in my truck: Yaesu FT-65R HT (backup), Kenwood TM-V71A dual-band mobile (primary, 50W), laminated frequency card with local repeater offsets and PL tones, phone with RadarScope app, and a folding ruler for hail measurement. The whole setup cost maybe $400 total and fits in a camera bag.

Not glamorous. Doesn't need to be.

When Cell Phones Fail

Skeptics ask: "Why not just use a cell phone to call 911 or text reports?" Fair question.

During the 2011 Joplin, Missouri EF5 tornado, cell service failed within minutes. Towers were destroyed or overloaded. Amateur radio operators maintained the only reliable communication link between shelters, the EOC, and hospitals for over six hours. The after-action report specifically credited ham radio volunteers with coordinating search and rescue in areas with no other communication.

Same story repeated in Hurricane Harvey (2017), Hurricane Maria (2017), the 2023 Maui fires, and dozens of smaller events every year. Cell networks have single points of failure. A well-maintained repeater system with battery backup is simpler and more resilient.

This isn't theoretical. It happens every severe weather season.

Getting Involved in Your Area

The path from "interested" to "active Skywarn spotter with ham radio" is shorter than you think:

1. Get your Technician license if you don't have one already. That gives you full VHF/UHF privileges.
2. Take basic Skywarn training from your local NWS office.
3. Join your local ARES group (Amateur Radio Emergency Service). Find your ARRL section's ARES contact at arrl.org/ares.
4. Learn your local frequencies. Get the repeater list for your area and program them into your radio.
5. Monitor a net during the next severe weather event. Just listen first. Learn the rhythm and protocol.
6. Check in when you're ready and have something to report.

Most ARES groups meet monthly and practice net operations. Some run weekly nets regardless of weather. That practice pays off when a real event hits and adrenaline is high.

A Reality Check

I'll be honest about something: most of the time, Skywarn activations are uneventful. You sit in your truck at a pre-planned observation point, it rains hard for 30 minutes, nothing severe materializes, and the net closes. That's the majority of activations.

But the times it matters — really matters — make all the slow nights worthwhile. Knowing that a report you transmitted contributed to a warning that gave a family time to get underground? That's the reason this program exists.

And it's one of the few areas where amateur radio provides a public service that genuinely cannot be replicated by any other technology at the same cost and reliability level. Not yet, anyway.

Moving Forward

Severe weather isn't going away. If anything, recent seasons have been more active. The NWS needs ground-truth data from trained observers, and ham radio provides the most reliable, lowest-latency method to deliver it. Get trained, get on the air, and contribute to a system that directly protects your community.

The next time sirens go off in your area, you can be part of the solution rather than someone wondering what's happening.