04 Sept 2009 - Good forecast but no qso !

WHY NO QSO ?

Nice to do webpages when qso is made and band is opened, ...but what about no qso when predictions are good?
Hope this helps for better understanding.

The general situation :

1-AIS reports

aisZS-04sep2009-0750z

aisFR-04sep2009-0830z

aisZS-04sep2009-0850z

aisFR-04sep2009-0930z

aisZS-04sep2009-0930z

aisZS-04sep2009-10z

aisZS-04sep2009-1015z

aisZS-04sep2009-1033z

aisZS-04sep2009-1045z

aisFR-04sep2009-11z

aisZS coverage

2-The Hepburn predictions

Almost same situation all day

3-The radiosounding data

310.3 303.7
316.4 306.3

4-The predicted data from NOAA Air Resources Laboratory - GDAS Profile

PE 04 sept 00z	PE 04 sept 12z
HEIGHT DT/DZ TDIFF CRITICAL INVERSION 399. 0.003 0.7 618. 0.003 0.7 842. 0.006 1.4 1072. 0.008 1.9 1549. 0.008 4.0 ** 2053. 0.009 4.5 2587. 0.006 3.2 3152. 0.003 1.8 3749. 0.003 2.0 4385. 0.004 2.3 5065. 0.003 2.4 5795. 0.003 2.3 6585. 0.002 1.3 7442. 0.001 0.6 8383. 0.002 1.7 9435. 0.004 4.2 10637. 0.004 4.3 12053. 0.008 11.3 13870. 0.017 31.6 16383. 0.013 32.4 20718. 0.025 26648. 0.030 **	HEIGHT DT/DZ TDIFF CRITICAL INVERSION 345. 0.003 0.6 571. 0.008 1.8 802. 0.006 1.4 1038. 0.006 1.3 1528. 0.005 2.2 2041. 0.003 1.5 2579. 0.002 1.1 3146. 0.002 1.2 3746. 0.002 1.4 4382. 0.002 1.4 5061. 0.003 2.2 5790. 0.002 1.2 6576. 0.002 1.6 7430. 0.001 1.1 8369. 0.002 1.7 9418. 0.003 3.5 10616. 0.004 4.2 12036. 0.013 18.7 ** 13882. 0.015 26.8 16399. 0.013 31.7 20721. 0.025 26687. 0.029 **
DURBAN 04 sept 00z	DURBAN 04 sept 12z
HEIGHT DT/DZ TDIFF CRITICAL INVERSION 375. 0.021 3.3 ** 598. 0.011 2.4 828. 0.013 3.1 1065. 0.013 3.0 1561. 0.010 5.2 2083. 0.003 1.6 2630. 0.001 0.6 3204. 0.001 0.3 3809. 0.000 0.2 4448. 0.001 0.8 5130. 0.003 2.4 5865. 0.005 3.6 6662. 0.004 3.4 7533. 0.002 2.1 8492. 0.002 2.3 9562. 0.003 3.1 10784. 0.004 4.3 12211. 0.003 4.5 13977. 0.011 19.8 16456. 0.016 40.1 20727. 0.025 26601. 0.030 **	HEIGHT DT/DZ TDIFF CRITICAL INVERSION 348. 0.027 3.6 ** 577. 0.012 2.8 814. 0.007 1.7 1058. 0.003 0.8 1561. 0.001 0.3 2086. 0.000 0.2 2635. 0.000 0.0 3211. 0.000 0.1 3817. 0.000 0.1 4460. 0.002 1.5 5145. 0.004 2.8 5884. 0.004 2.9 6684. 0.003 2.3 7556. 0.003 2.4 8516. 0.002 2.2 9589. 0.003 2.7 10807. 0.002 2.5 12232. 0.004 6.1 13993. 0.011 19.7 16453. 0.016 39.1 20713. 0.026 26625. 0.030 **
South 5R8 04 Sept 00z	South 5R8 04 Sept 12z
HEIGHT DT/DZ TDIFF CRITICAL INVERSION 426. 0.001 0.1 649. 0.002 0.3 875. 0.003 0.6 1108. 0.008 1.8 1591. 0.008 4.0 ** 2099. 0.005 2.4 2635. 0.007 4.0 3204. 0.007 3.8 3809. 0.006 3.8 4456. 0.004 2.4 5146. 0.001 0.9 5885. 0.002 1.6 6685. 0.004 2.9 7557. 0.001 1.2 8513. 0.002 1.5 9579. 0.002 2.1 10788. 0.002 2.8 12215. 0.009 12.9 14020. 0.012 22.1 16510. 0.015 36.7 20759. 0.023 99.2 26632. 0.031 **	HEIGHT DT/DZ TDIFF CRITICAL INVERSION 436. 0.003 0.6 659. 0.004 0.9 887. 0.005 1.1 1121. 0.005 1.3 1605. 0.006 2.8 ** 2114. 0.005 2.6 2650. 0.006 3.0 3218. 0.006 3.2 3821. 0.006 3.5 4466. 0.006 3.9 5156. 0.003 2.0 5898. 0.003 2.3 6701. 0.002 1.8 7573. 0.001 1.2 8531. 0.001 1.1 9596. 0.001 1.6 10806. 0.004 4.8 12241. 0.009 12.2 14051. 0.013 23.1 16540. 0.014 34.5 20783. 0.024 26663. 0.032 **
FR 04 Sept 00z	FR 04 Sept 12z
HEIGHT DT/DZ TDIFF CRITICAL INVERSION 444. 0.000 0.1 666. 0.001 0.2 892. 0.001 0.3 1123. 0.004 1.0 1603. 0.006 2.8 ** 2107. 0.005 2.6 2637. 0.004 2.1 3199. 0.009 4.8 3799. 0.007 4.2 4444. 0.010 6.3 5139. 0.007 4.7 5889. 0.003 1.9 6700. 0.002 1.8 7581. 0.002 1.4 8551. 0.002 2.1 9634. 0.003 3.3 10871. 0.005 5.8 12338. 0.007 10.8 14143. 0.004 8.0 16556. 0.013 31.1 20727. 0.026 26565. 0.031 **	HEIGHT DT/DZ TDIFF CRITICAL INVERSION 450. 0.001 0.2 672. 0.000 0.1 899. 0.002 0.4 1130. 0.004 1.0 1609. 0.006 2.9 ** 2114. 0.007 3.4 2647. 0.008 4.3 3215. 0.007 3.9 3818. 0.005 3.2 4462. 0.007 4.2 5157. 0.006 4.3 5905. 0.002 1.7 6711. 0.002 1.8 7592. 0.003 2.9 8562. 0.002 2.0 9646. 0.003 3.8 10891. 0.008 9.8 12370. 0.005 7.3 14175. 0.004 7.5 16594. 0.014 33.0 20751. 0.025 26586. 0.033 **

5-The surface pressure charts

6-The visible maps

Reports and sceenshots

NONE!

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