Tropospheric Ducting Forecast for VHF & UHF Radio & TV
DX Info Centre - Tropospheric Ducting Forecast
6-Day Forecast of VHF, UHF & Microwave Radio & TV Anomalous Propagation & Interference


2020 William R. Hepburn
CLICK HERE FOR
Current Conditions

by Jon Harder / APRS
For personal hobby use only.
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Forecast in 3 hour intervals for first 30 hours ... and in 6 hour intervals for the remainder of the 6 days
Maps updated daily around 1800 UTC
Click on map to advance - or use keyboard left/right arrows
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NIL
MARGINAL
FAIR
MODERATE
HIGH
STRONG
VERY STRONG
INTENSE
VERY INTENSE
EXTREME
EXTREME
U = UNSTABLE SIGNAL AREAS

slideshow


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NIL SIG
MARGINAL
FAIR
MODERATE
HIGH
STRONG
VERY STRONG
INTENSE
VERY INTENSE
EXTREME
EXTREME

Past Week Maps
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Sunday
Monday Tuesday Wednesday Thursday Friday Saturday
Click for larger image



 The areas noted in the forecast have the necessary atmospheric conditions to produce tropospheric bending of VHF, UHF and/or  microwave radio waves. Tropospheric bending extends the range of radio & TV stations well beyond their normal limit and thus increases interference amongst stations as well.
 How to use the Tropospheric Ducting Forecast
 
Tropospheric DX Modes
 
History of the Tropospheric Ducting Forecast
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GrADS 2.0 (COLA/IGES) used to create maps.
GrADS copyright at http://cola.gmu.edu/grads/gadoc/COPYRIGHT.
Raw meteorological data source : Meteorological Service of Canada.
MSC licence at http://dd.weatheroffice.ec.gc.ca/doc/LICENCE_GENERAL.txt.

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