William Hepburn's
Worldwide

Tropospheric Ducting Forecast
6-DAY FORECASTS OF VHF, UHF & MICROWAVE RADIO & TV SIGNAL STRENGTH & INTERFERENCE  © 2015


The display of current forecast maps on other websites is not permitted under any circumstance.
Maps updated daily around 1900 UTC.
..U.. = unstable signal areas.
 Current Conditions
by Jon Harder / APRS
Low
1.4
2
3
4
5
6
7
8
9
10+
NIL
MRGNL
FAIR
MDT
GOOD
STRONG
VRY STG
INTENSE
VRY INT
EXTREME
EXTREME
CLICK HERE FOR 42 HOUR FORECAST IN 6 HOUR INTERVALS
© 2016 William R. Hepburn
Please check here for copyright restrictions.

6 DAY PREVIEW
Click on map for more detail - Hit Refresh on your browser to ensure display of latest maps
Day 1 Day 2
Day 3 Day 4
Day 5 Day 6


42 HOUR FORECAST
1
2
3
4
5
6
7
8


EXTENDED  FORECAST
Day 3
Day 4
Day 5
Day 6
Low
1.4
2
3
4
5
6
7
8
9
10+
NIL
MRGNL
FAIR
MDT
GOOD
STRONG
VRY STG
INTENSE
VRY INT
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

Copyright ©2016 William R. Hepburn
The information on this website is primarily for personal use.
 The display of current forecast maps on other websites is not permitted under any circumstance.

NON-COMMERCIAL USE
Broadcast of text/verbal information derived by using the maps, and display of older maps on websites or in publications for non-commercial purposes is permitted as long as William Hepburn is credited as the original source. Terms for government use are the same as for commercial use.

COMMERCIAL OR GOVERNMENT USE
Commercial or government use of any maps (forecast or archived) or the information they contain, whether for internal operational use or in the development of products or services, without obtaining licensed consent from the owner, is strictly prohibited. To obtain a licence, please contact the owner at dxinfo at cogeco.ca


GrADS 2.0 (COLA/IGES) used to create maps.
Also see GrADS copyright at ftp://grads.iges.org/grads/src/COPYRIGHT.

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