About Us

Northeast Tennessee District 7 SKYWARN organization was founded on Friday, September 16, 2005. On the same day, the FCC granted the original call KI4LTU. On Tuesday, January 10, 2006 the FCC granted the vanity call WX4TN.

Northeast Tennessee District 7 SKYWARN serves the 7 counties of Carter, Greene, Hawkins, Johnson, Sullivan, Unicoi, & Washington. We service the National Weather Service in Morristown, Tennessee. Training / activation nets are held on the K4LNS 147.270(+) MHz (PL 88.5 Hz ). Traning nets held every Saturday night at 12:00 UTC (8:00 P.M. Eastern). Net control will use the call WX4TN during training / activation nets. All severe weather reports are relayed via WX4MRX at the National Weather Service in Morristown, Tennessee. We are a Weather-Ready Nation Ambassador.

If your interested in becoming a member of Northeast Tennessee District 7 SKYWARN, download our application and bring it to the meeting and we will welcome you.

To subscribe to our newsletter and get on the email list, please subscribe here:  http://eepurl.com/bxuU2v


Repeaters: 1. 147.270 (+) PL 88.5; 2. 145.290 (-) PL 103.5; 3. 146.970 (-) PL 123.0

Simplex: 146.700 & 146.550

Status Level Green: An advisory for any of the counties in the district is issued by NWS Morristown or no severe weather is expected. Repeater will be operational as usual.

Status Level Yellow: A severe thunderstorm watch, tornado watch, or flash flood watch is issued for any of the counties in the district by NWS Morristown. Severe weather will likely occur in our area. Please keep all conversations to the point on the repeater and be prepared to relinquish the repeater to net control should the watch be upgraded to a warning.

Status Level Red: A severe thunderstorm warning, tornado warning, or flash flood warning has been issued for any of the counties in the district by NWS Morristown. This means severe weather is occurring in our area. Take cover. The severe WX net will be operational at this time and the repeater will only be open to emergency traffic, severe reports, or questions about the storm. No other traffic will be permitted on the repeater. All traffic must go through net control.

Reporting Critera  PDF

1. Wall Cloud

2. Tornado

3. Funnel Clouds

4. Cloud Rotation

5. Damaging Winds (58 MPH or greater measured)

6. Hail 1″ or larger

7. Flooding – Any stream out of its banks or water covering a roadway (do not report

minor stream flooding & overflowing ditches)

What NOT to report:

1. Anything not seen personally.

2. Information from Internet, TV, or radar, or traffic from scanners or media

broadcasting to the Net Control Station while a formal net is in progress.

3. Frivolously Reports such as “It’s getting really windy cloudy here”, “We are

experiencing a lot of lightning and heavy rain”, or “We still have sunshine at my

location” are not valid reports.

4. Rain fall reports have been omitted.

Common Hail Sizes:

Pea – 0.25″

Penny – 0.75″

Nickel – 0.88″

Quarter – 1.00″

Golfball – 1.75″

Tennis – 2.50″

Baseball – 2.75″

Softball – 4.25″

Wind Speed Estimator: MPH

39-54: Twigs break off of trees; wind impedes walking.

55-72: (Severe) Damage to chimneys, pushes over shallow rooted trees.

73-112: Peals surface off roofs, Pushes autos off the road.

113-157: Roofs torn off houses, weak buildings destroyed. Large trees snapped and


158+: Severe Damage. Cars lifted off ground.