By Popular Request...

or at the very least...as I promised. NOAA Air Resources Lab...aka...squiggly lines http://ready.arl.noaa.gov/READYcmet.php Enter your desired Lat and Long...remember to account for the Sthern Hemisphere ie use a negative. Choose sounding - 0-192h Global. Choose the latest cycle (not forgetting that everything is in Zulu time - GMT - UTC etc). Pick you time (I'd suggest 12 and 3pm...which is 00 and 03 UTC). Enter the code and hey presto you're ready for your 300km. RASP forecasts - http://zakalwe.com/ - don't be put off by the cat...a gun might help.