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Odbor leteck� meteorologie

P�edpov�� vhodn�ch podm�nek pro plachta�sk� a bal�nov� l�t�n�

 
 
Convection conditions forecast for balloning and gliding in Prague area
  (the spot model elevation  1142 ft msl)
 
--------------------------------------------------------------------------------------------------------------
|      |                  |                  |             |       |Height of  |     |     |     |           |
| Term |    Ballooning    |     Gliding      |Base and top |Type of|cloudless  |     |     |     |Atmospheric|
|      |                  |                  |of convective| conv. |convection |  T  | Tc  | Tp  |instability|
|      |                  |                  |  clouds     |clouds.|  above    |     |     |     |indicators |
|------|-------------------------------------|-------------|       |2000 ft msl|     |     |     |-----------|
| YYGG |  Favorable conditions (yes/no/?)    | Base | Top  |       |           |     |     |     |  Fi |Sl850|
|------|-------------------------------------|------|------|-------|-----------|-----|-----|-----|-----|-----|
| UTC  |Surface|Convection|Surface|Convection|  hft |  hft |Cu/Cb/*|    hft    |deg.C|deg.C|deg.C|  -  |  -  |
|      | wind  |          |  wind |          |      |      |       |           |     |     |     |     |     |
|------------------------------------------------------------------------------------------------------------|
| 0912 |   ?   |    no    |        yes       |   65 |   75 |  Cu   |           | 11.8| 11.1|  0.7| -11 |   6 |
| 0913 |   ?   |    no    |        yes       |   67 |   78 |  Cu   |           | 12.3| 11.6|  0.7| -11 |   5 |
| 0914 |   ?   |    no    |        yes       |   68 |   79 |  Cu   |           | 12.3| 12.2|  0.1| -11 |   5 |
| 0915 |   ?   |    no    |        yes       |   65 |   85 |  Cu   |           | 12.3| 12.4| -0.1| -13 |   5 |
| 0916 |   ?   |    no    |        yes       |   66 |   86 |  Cu   |           | 12.2| 12.9| -0.7| -14 |   6 |
| 0917 |   ?   |    no    |        yes       |   69 |   77 |       |     50    | 11.5| 12.9| -1.4| -13 |   6 |
| 0918 |        yes       |  yes  |    no    |   68 |   79 |       |           | 10.1| 13.1| -3.0| -12 |   6 |
| 0919 |        yes       |  yes  |    no    |   68 |   79 |       |           |  8.1| 13.1| -5.0| -12 |   6 |
| 0920 |        yes       |  yes  |    no    |  103 | stab |       |           |  6.7| 21.3|-14.6| -12 |   6 |
| 0921 |        yes       |  yes  |    no    |  105 | stab |       |           |  5.9| 22.3|-16.4| -12 |   6 |
| 0922 |        yes       |  yes  |    no    |  107 | stab |       |           |  5.4| 22.5|-17.1| -11 |   6 |
|------------------------------------------------------------------------------------------------------------|
| 1003 |        yes       |  yes  |    no    |  114 | stab |       |           |  3.9| 23.3|-19.4|  -9 |   6 |
| 1004 |        yes       |  yes  |    no    |  114 | stab |       |           |  3.7| 23.4|-19.7|  -9 |   6 |
| 1005 |        yes       |  yes  |    no    |  114 | stab |       |           |  5.1| 23.8|-18.7|  -8 |   6 |
| 1006 |        yes       |  yes  |    no    |  110 | stab |       |           |  7.6| 23.1|-15.5|  -8 |   5 |
| 1007 |  yes  |    ?     |  yes  |    no    |   71 | stab |       |     24    | 10.5| 15.5| -5.0|  -8 |   5 |
| 1008 |  yes  |    ?     |  yes  |    ?     |   64 | stab |       |     39    | 12.4| 14.8| -2.4|  -8 |   5 |
| 1009 |  yes  |    no    |        yes       |   64 |   74 |       |     57    | 13.5| 14.8| -1.3|  -8 |   5 |
| 1010 |   ?   |    no    |        yes       |   67 | stab |  Cu   |           | 14.4| 15.0| -0.6|  -7 |   5 |
| 1011 |   ?   |    no    |        yes       |   66 | stab |  Cu   |           | 14.8| 15.3| -0.5|  -7 |   4 |
| 1012 |   ?   |    no    |        yes       |   72 | stab |       |     64    | 15.1| 16.9| -1.8|  -7 |   4 |
| 1013 |   ?   |    no    |        yes       |   68 | stab |       |     64    | 15.4| 16.6| -1.2|  -6 |   3 |
| 1014 |   ?   |    no    |        yes       |   65 |   77 |       |     60    | 15.7| 16.7| -1.0|  -6 |   3 |
| 1015 |   ?   |    no    |        yes       |   59 |  102 |  Cu   |           | 16.0| 16.1| -0.1|  -7 |   2 |
| 1016 |   ?   |    no    |        yes       |   57 |  115 |  Cu   |           | 15.5| 16.1| -0.6|  -8 |   3 |
| 1017 |   ?   |    no    |  yes  |    ?     |   54 |  106 |       |     42    | 14.7| 15.8| -1.1|  -8 |   3 |
| 1018 |   ?   |   yes    |  yes  |    no    |   53 |  119 |       |           | 13.3| 15.9| -2.6|  -7 |   3 |
| 1019 |        yes       |  yes  |    no    |   49 |  129 |       |           | 12.2| 15.6| -3.4|  -7 |   3 |
| 1020 |        yes       |  yes  |    no    |   53 |  115 |       |           | 11.2| 15.9| -4.7|  -7 |   3 |
| 1021 |        yes       |  yes  |    no    |   52 |  110 |       |           | 10.2| 15.8| -5.6|  -7 |   3 |
| 1022 |        yes       |  yes  |    no    |   50 |  108 |       |           |  9.0| 15.5| -6.5|  -7 |   4 |
|------------------------------------------------------------------------------------------------------------|
| 1103 |        yes       |  yes  |    no    |   36 |   93 |       |           |  7.1| 13.0| -5.9| -10 |   5 |
| 1104 |        yes       |  yes  |    no    |   13 | stab |       |           |  6.9|  8.1| -1.2| -10 |   5 |
| 1105 |        yes       |  yes  |    no    |   26 |   30 |       |           |  7.8| 10.5| -2.7| -11 |   6 |
--------------------------------------------------------------------------------------------------------------
 Notes:   1. T  - surface temperature - 2 m AGL 
          2. Tc - convective temperature
          3. Tp - thermal deficit (the dufference between the surface temperature and the convective temperature ( T-Tc))
          4. Cloud's base and top are determined relative to MSL 
          5. "*"  - unpossible to determine the cloud's type 
          6. "-" - the cloud's base height is under the ground level
          7. Cloudless convection - the height represents the top level. This determines the upper height of instable
             atmospheric layer, provided the conditions for  development of convective clouds (Cu/Cb) are not satisfied.
          8. Fi - Faust index  (a (in)stability parameter) [-]
          9. SI850 - Showalter Index (a (in)stability parameter) [-]	





stranka pripravena 09.05.2025 v 12:23 swing a.s.

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