XWARN was established after the 1974 Xenia Tornado to provide early notification to the citizens of Greene County in the event of 
Severe Weather situations.
 Severe weather reports are forwarded to the National Weather Service in Wilmington, via Dayton SKYWARN.
This is the criteria for establishing and operating a Weather Net in Greene County.

Latest Update - 5/31/04
NOW- you can download this sheet!
See  how at the bottom of this page!

Primary Weather Net Repeater - 
147.165+
 (pl100Hz on one receiver)
Backup Repeater - 
147.045+ 
(no tone)
BARC system


Controller update is still pending.

(NOTE - at the present time our new controller is still in the programming stages, and these special tones are not yet operational. If you are an XWARN club member, check the "messages" on the repeater if inclement weather is imminent. There may be a message posted as to the status of any weather watches in Greene County.)


There are 3 stages of development for XWARN weather nets. 

Level One - Watch is Issued
If the National Weather Service issues a Severe Thunderstorm or Tornado "WATCH" that involves Greene County, the repeater has a vocal identifier that says "Weather Watch".  This is to make users of the repeater aware that a watch has been issued. Net Control operators will occasionally announce the details through out the watch period 
Tune to the NWS radio channel at 162.475 to get the details, or check the repeater for "Messages".
There is no net operating at this time.  The repeater is available for normal use.

Level Two  -  Storm is Imminent
As severe weather approaches, a Net Control Station may begin a relaxed net. The courtesy tone is changed from the normal bubble tone to a Morse code letter "X". At this time, the net control may ask for check-ins from radio operators in Greene County to determine who is available and in what parts of the county. The repeater may be available for normal usage, but check with the Net Control Station, first. 

Level Three  -  Warning
Severe Weather has, or is about to enter Greene County. A WARNING has likely been issued by the NWS.  The repeater is now placed under a directed net. The courtesy tone is changed to a Morse code letter "W". The Net Control Station will read the warning information.
All stations should LISTEN and NOT TRANSMIT unless they have EMERGENCY or PRIORITY Traffic, or SPECIFIC INFORMATION as requested by the Net Control Station.

The type of information we are looking for is listed below. 

PLEASE, PLEASE, PLEASE -
DO NOT REPORT INFORMATION THAT YOU HEAR FROM POLICE / FIRE SCANNERS, OR RADIO /TV / CABLE STATIONS.
 
These agencies report their information directly to the NWS, and repeating it on an 
Amateur Radio Weather Net can cause misinformation and confusion for the NWS, 
and may cause false or delayed alerts.

Information the net is looking for

  • Tornadoes
  • Funnel Clouds
  • Wall Clouds
  • Persistent rotation in the clouds
  • Hail that is 1/2 inch or larger - and how much
  • Tree's uprooted or downed
  • Large limbs down - is it healthy - what size?
  • Building's damaged

Wind Speed Estimates

  • Small limbs break off trees - 39-54 MPH
  • Shallow rooted trees downed - 55-72 MPH
  • Minor structural damage - 73-113 MPH
  • Trailers overturned - 73-113 MPH
  • Major structural damage - 113+ MPH
  • Trailers destroyed - 113+ MPH

Know Your Location!
When reporting severe weather or damage, give the Net Control good directions. Give him the town you are in or nearest to as well as an intersection of 2 major roads that you are near. If you are not near a town, give the quadrant of the county you are in, such as South East, South West, North East, or North West quadrant.

What if it really happens?

Stay Cool!
In the event that an area is hit with damage, XWARN will continue the weather net on the 147.165 repeater until the "all clear" is given by NWS. More weather may be coming our way. Other counties and the NWS still depend on our reports (i.e. Clark, Fayette).
 

ARES NET HANDOFF
In the event of severe weather impacting the area and causing widespread damage, Once the current weather situation is over, the XWARN Weather Net will stand down, and control of the frequency will be handed off to Greene County ARES. and the XWARN Greene County Weather Net will be on STANDBY in case more severe weather develops.
  The Greene County ARES Emergency Frequency Plan and Emergency Operations Plan will be implemented. Tactical, Resource, and Command nets will be established on various repeaters / frequencies based upon the areas that have suffered damage. Use the chart below for additional repeater information.

The primary back-up frequency is 147.165 simplex. If this is unusable the countywide simplex frequency of 147.555 may be used.

Greene County Repeaters / Simplex Frequencies 

Repeaters

147.165+(100 Hz tone) Xenia XWARN
147.045+
Bellbrook / Sugarcreek BARC
146.910- Greene County ARES
145.410-
(pl 118.8 Hz) Fairborn UVARC
147.105+ Xenia

442.375+ 
  (pl 118.8 Hz) Fairborn UVARC
442.725+ Greene County ARES
443.100+  Xenia-XWARN
444.3125+
(pl 131.8 Hz) WPAFB 
443.675+ Bellbrook / Sugarcreek BARC

 

Simplex

147.555 - Greene County Primary Simplex
147.480 - Xenia Primary Simplex
147.405 - Bellbrook / Sugarcreek Primary

 2 Meter Simplex
146.490,147.450, 147.510, 146.430, 146.490
146.550, 147.450, 147.510 - 

70 CM Simplex
445.100, 445.400, 446.100, 446.400, 
446.700, 446.850

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