6-Day Forecast of VHF, UHF & Microwave Radio & TV Anomalous Propagation & Interference
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6-Day Forecast of VHF, UHF & Microwave Radio & TV Anomalous Propagation & Interference |
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Forecast © 2025 William R. Hepburn
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| For personal hobby use only. Please check here for additional usage restrictions and information on licences for business or government use. |
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| Forecast in 3 hour intervals for first 36 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 Hit Refresh on your browser to ensure display of latest maps. You must have JavaScript enabled. |
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| U = UNSTABLE SIGNAL AREAS |
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| Past Week Maps |
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| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
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| 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 |
| 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.weather.gc.ca/doc/LICENCE_GENERAL.txt. Privacy policy |
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