Emergency Traffic Nets: How Amateur Radio Supports Emergency Communications

When hurricanes, wildfires, ice storms, or widespread power outages disrupt normal communications, amateur radio operators often become an important backup resource. One of the primary ways they coordinate information is through organized emergency traffic nets, where trained operators relay messages quickly and accurately across local, regional, and national networks.

Although the term “traffic net” may sound intimidating to newcomers, the concept is straightforward. A net is simply an organized on-air gathering where stations follow established procedures to ensure information is passed efficiently without confusion.

When cell towers are underwater, the internet is dark, and power is gone for weeks, one thing still works: disciplined amateur radio emergency traffic nets. These are not casual ragchews—they are the U.S. equivalent of a military message center using voice and digital Morse/RTTY over HF/VHF.

In this guide, I’ll explain how emergency traffic nets operate, who participates, what types of messages are handled, and how new operators can become involved.

1. National Traffic System (NTS) – The Backbone That Never Sleeps

Established in 1949, still running perfectly in 2025.

Purpose
Move formal written record traffic (ICS-213, welfare inquiries, supply requests) anywhere in the continental U.S. using only amateur radio.

Structure (daily, 365 days a year)

• Local/section nets (VHF/UHF) → Region nets → Area nets → Transcontinental Corps

Key daily cycles and frequencies you can hear right now

Cycle Name	Time (Eastern)	Primary Frequency	Alternate	Mode / Notes
1st Region Net	7:45 am / 11:45 am / 3:45 pm / 6:45 pm	3.925 MHz	3.738	LSB – Eastern Area
2nd Region Net	Same times	3.925 MHz		LSB
Eastern Area Net (EAN)	8:30 pm	7.255 MHz	3.927	Heavy traffic night cycle
12th Region Cycle 2	8:00 pm	1.810 MHz		Deep night coverage
PAN (Pacific Area Net)	9:00 pm	7.085 MHz		West Coast
Transcontinental (TCC)	Varies	14.057 kHz CW		Digital/Morse relay

Procedure you will actually hear

1. Net Control Station (NCS) calls the net with a scripted preamble.
2. Stations “list” with call sign + “one traffic” or “multiple traffic” + precedence (ROUTINE / WELFARE / PRIORITY / EMERGENCY).
3. EMERGENCY traffic is taken immediately; everything else stops.
4. Messages are relayed station-to-station until they exit the system at the destination section net.

Pro tip: Even if you’re not handling traffic, just listening to EAN at 8:30 pm ET on 7.255 MHz will teach you perfect net discipline in one session.

2. Hurricane Watch Net (HWN) – The Gold Standard of Directed Nets

Activated only when a storm is within 300 miles of landfall or expected landfall.

Frequency	Mode	When Active
14.325 MHz	USB	Primary – daytime
7.268 MHz	LSB	Primary – nighttime
14.265 MHz	USB	SATERN backup / health & welfare

How it actually works

• Net Manager at WX4NHC (National Hurricane Center) activates.
• Liaison station inside NHC (usually K4NHK or similar) relays exact needs: “Need observed wind from Grand Cayman” or “Can anyone reach Anguilla?”
• Ground-truth reports from hams in the storm go directly to NHC forecasters in real time.
• No ragchewing. You check in only if you have measured data or are the requested station.

2025 note: HWN now routinely uses Winlink for high-precision GPS positions and photos from stations inside the eyewall.

3. SKYWARN Storm Spotter Nets – Where Warnings Are Born

Run by each local National Weather Service office. Usually on VHF/UHF repeaters.

Typical activation flow

1. NWS issues Severe Thunderstorm/Tornado Watch.
2. Local Skywarn net activates on a pre-published repeater (find yours at weather.gov → your local office → Skywarn page).
3. Trained spotters report:

• Rotation, wall clouds, funnel clouds
• Measured hail size (quarter = 1″, golf ball = 1.75″)
• Wind gusts (measured, not estimated)
• Flash flooding depth on roads

Example frequencies (varies by NWS office – these are common)

NWS Office	Primary Repeater Output	Backup Simplex
Miami	146.880– (103.5 Hz)	146.550
Houston	146.820–	146.580
Norman OK	147.120+	146.520
Chicago	146.760–	146.520

Procedure every spotter must know

• Wait for Net Control to call for reports by county.
• Give: Call sign → Location → Report (never plain language like “tornado on the ground” until you’re acknowledged).
• Example: “Net Control, Whiskey Five Alpha Alpha Alpha, 3 miles south of Stillwater, rotation with debris at 1845 Zulu.”

Putting It All Together in a Real Disaster (Example: Category 4 Landfall)

Day –1: Hurricane Watch Net activates on 14.325 MHz
Day 0 morning: Local Skywarn nets activate on VHF
Landfall + 6 hrs: All repeaters down → NTS takes over on HF
Landfall + 12 hrs: Welfare traffic (“I’m OK in Biloxi”) floods into SATERN 14.265 MHz
Landfall + 24-72 hrs: NTS + Winlink move thousands of formal messages out of the blackout zone

Quick-Start Cheat Sheet for Your Ham Shack

• 14.325 MHz USB – Hurricanes (day)
• 7.268 MHz LSB – Hurricanes (night)
• 7.255 MHz LSB – Eastern Area Net every night 8:30 pm ET
• 3.975 MHz LSB – Many state RACES/emergency nets
• 14.265 MHz USB – SATERN health & welfare
• Your local Skywarn repeater (write it on your radio)

Why This Matters

Emergency traffic nets aren’t just for disasters. Regular training nets help operators develop disciplined operating skills, accurate message handling, and confidence before those skills are ever needed in a real emergency.

Although emergency traffic nets are thankfully uncommon in day-to-day operation, every licensed amateur should understand how they function before a real emergency occurs. Even casual participation in local training nets provides valuable experience with disciplined operating procedures and formal message handling.

Views: 143