William Hepburn's
Worldwide

Tropospheric Ducting Forecast
6 DAY FORECASTS OF VHF, UHF & MICROWAVE RADIO & TV SIGNAL STRENGTH & INTERFERENCE  © 2015
SERVING THE WORLD SINCE 2000


Maps updated daily around 1800 UTC.
..U.. = unstable signal areas.
 Current Conditions
by Jon Harder / APRS
Click on map to advance ... or use keyboard left / right arrows

FORECAST NOW IN 3 HOUR INTERVALS FOR FIRST 30 HOURS
REST OF 6 DAYS NOW IN 6 HOUR INTERVALS
Hit Refresh to ensure display of latest maps. You must have Java enabled.

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

slideshow


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
If new clickable map format won't work :
1. Do you have Java enabled ?
2. Is your browser up-to-date ?
3. If it still won't work, you can still get the old style webpage by replacing .html  by  _old.html

Copyright ©2015 William R. Hepburn
The display of current forecast maps on other websites is not permitted under any circumstance.
  
COMMERCIAL USE
Commercial use of any current forecast maps or the information they contain, without obtaining licensed consent from the owner, is strictly prohibited.

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.

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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EOF