Soaring Guidance
Issued by NWS Denver/Boulder, CO

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086
UXUS97 KBOU 250039
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
1839 MDT Sunday, July 24, 2016

This forecast is for Monday, July 25, 2016:

If the trigger temperature of 83.8 F/28.8 C is reached...then
   Thermal Soaring Index....................... Excellent
   Maximum rate of lift........................ 1134 ft/min (5.8 m/s)
   Maximum height of thermals.................. 17682 ft MSL (12375 ft AGL)

Forecast maximum temperature................... 93.0 F/34.3 C
Time of trigger temperature.................... 1115 MDT
Time of overdevelopment........................ None
Middle/high clouds during soaring window....... None
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 11161 ft MSL (5854 ft AGL)
Thermal soaring outlook for Tuesday 07/26...... Excellent

Wave Soaring Index............................. Poor
Wave Soaring Index trend (to 1800 MDT)......... No change
Height of stable layer (12-18K ft MSL)......... None
Weak PVA/NVA (through 1800 MDT)................ Neither
Potential height of wave....................... 15895 ft MSL (10588 ft AGL)
Wave soaring outlook for Tuesday 07/26......... Poor

Remarks...

Sunrise/Sunset.................... 05:52:43 / 20:19:32 MDT
Total possible sunshine........... 14 hr 26 min 49 sec (866 min 49 sec)
Altitude of sun at 13:05:57 MDT... 69.63 degrees

Upper air data from numerical model forecast valid on 07/25/2016 at 0600 MDT

Freezing level.................. 16428 ft MSL (11121 ft AGL)
Convective condensation level... 14925 ft MSL (9618 ft AGL)
Lifted condensation level....... 15445 ft MSL (10138 ft AGL)
Lifted index.................... -5.9
K index......................... +21.4

Height  Temperature  Wind  Wind Spd  Lapse Rate  ConvectionT  Thermal  Lift Rate
ft MSL  deg C deg F   Dir   kt  m/s  C/km F/kft  deg C deg F   Index    fpm  m/s
--------------------------------------------------------------------------------
 50000  -64.4 -83.9   275   21   11   2.0   1.1      M     M       M      M    M
 45000  -59.5 -75.1   270   33   17   5.6   3.1      M     M       M      M    M
 40000  -51.0 -59.8   260   40   20   6.2   3.4      M     M       M      M    M
 38000  -47.2 -53.0   260   44   23   6.2   3.4      M     M       M      M    M
 36000  -43.5 -46.3   265   49   25   6.6   3.6      M     M       M      M    M
 34000  -38.7 -37.7   265   46   23   8.0   4.4      M     M       M      M    M
 32000  -33.3 -27.9   260   41   21   8.3   4.6      M     M       M      M    M
 30000  -28.8 -19.8   265   32   16   7.7   4.2   47.1 116.7    10.0      M    M
 29000  -26.5 -15.7   265   27   14   7.7   4.2   46.3 115.4     9.5      M    M
 28000  -24.4 -11.9   270   23   12   5.9   3.2   45.4 113.7     8.9      M    M
 27000  -22.5  -8.5   270   21   11   6.1   3.3   43.9 111.0     7.8      M    M
 26000  -20.7  -5.3   275   19   10   6.1   3.3   42.5 108.6     6.8      M    M
 25000  -18.9  -2.0   275   17    9   6.4   3.5   41.3 106.3     5.9      M    M
 24000  -16.9   1.6   285   15    8   6.7   3.7   40.0 104.1     4.9      M    M
 23000  -14.9   5.2   295   13    7   6.7   3.7   38.9 102.1     4.1      M    M
 22000  -12.8   9.0   305   11    6   7.0   3.8   37.9 100.3     3.3      M    M
 21000  -10.7  12.7   310   11    6   7.2   3.9   36.9  98.4     2.4      M    M
 20000   -8.6  16.5   315   11    6   7.2   4.0   36.0  96.9     1.7      M    M
 19500   -7.6  18.3   320   11    5   7.3   4.0   35.6  96.2     1.3      M    M
 19000   -6.5  20.3   320    9    5   7.5   4.1   35.2  95.4     0.9      M    M
 18500   -5.4  22.3   315    8    4   7.5   4.1   34.9  94.7     0.5      M    M
 18000   -4.3  24.3   310    6    3   8.3   4.5   34.5  94.1     0.2      M    M
 17500   -3.0  26.6   300    5    2   8.5   4.7   34.3  93.7    -0.0   1128  5.7
 17000   -1.2  29.8   275    3    2   8.8   4.8   34.0  93.2    -0.4   1049  5.3
 16500    0.1  32.2   255    3    1   8.8   4.9   33.9  92.9    -0.5    996  5.1
 16000    1.4  34.5   235    3    2   8.9   4.9   33.7  92.7    -0.7    943  4.8
 15500    2.7  36.9   220    3    2   9.0   4.9   33.6  92.4    -0.9    888  4.5
 15000    4.0  39.2   210    4    2   9.0   4.9   33.5  92.2    -1.0    834  4.2
 14500    5.3  41.5   200    4    2   8.5   4.6   33.3  91.9    -1.2    780  4.0
 14000    6.6  43.9   200    4    2   8.5   4.7   33.1  91.5    -1.4    728  3.7
 13500    7.8  46.0   200    5    2   8.3   4.6   32.9  91.2    -1.6    676  3.4
 13000    9.0  48.2   205    5    2   8.4   4.6   32.6  90.7    -1.9    624  3.2
 12500   10.3  50.5   210    4    2   8.0   4.4   32.4  90.3    -2.1    573  2.9
 12000   11.4  52.5   215    4    2   7.8   4.3   32.1  89.8    -2.4    523  2.7
 11500   12.6  54.7   220    4    2   7.5   4.1   31.8  89.2    -2.7    474  2.4
 11000   13.6  56.5   215    5    2   7.2   4.0   31.4  88.5    -3.2    428  2.2
 10500   14.6  58.3   210    5    3   2.6   1.4   31.0  87.8    -3.7    383  1.9
 10250   14.7  58.5   210    5    3   5.0   2.7   30.3  86.5    -4.3    374  1.9
 10000   15.3  59.5   205    6    3  11.8   6.4   30.3  86.6    -4.4    347  1.8
  9750   16.0  60.8   205    7    3  10.5   5.7   30.4  86.7    -4.5    319  1.6
  9500   16.7  62.1   205    7    4   7.6   4.1   30.4  86.7    -4.6    293  1.5
  9250   17.0  62.6   205    8    4   5.1   2.8   30.1  86.1    -5.0    275  1.4
  9000   17.4  63.3   205    9    5   8.1   4.4   29.8  85.7    -5.3    254  1.3
  8750   18.0  64.4   205   11    6   8.9   4.9   29.8  85.6    -5.4    229  1.2
  8500   18.6  65.5   210   13    6   6.9   3.8   29.6  85.3    -5.6    205  1.0
  8250   19.0  66.2   210   14    7   5.5   3.0   29.3  84.8    -5.9    185  0.9
  8000   19.4  66.9   210   16    8   6.9   3.8   29.0  84.3    -6.3    165  0.8
  7750   20.0  68.0   210   17    9   7.6   4.2   28.9  84.0    -6.5    142  0.7
  7500   20.5  68.9   210   18    9   6.4   3.5   28.7  83.6    -6.7    120  0.6
  7250   20.9  69.6   210   18    9   5.6   3.1   28.4  83.1    -7.0     99  0.5
  7000   21.3  70.3   210   19   10   7.0   3.9   28.1  82.6    -7.4     79  0.4
  6750   21.8  71.2   210   19   10   3.6   2.0   27.9  82.1    -7.6     57  0.3
  6500   21.8  71.2   210   19   10  -1.5  -0.8   27.1  80.8    -8.4     50  0.3
  6250   21.7  71.1   210   18    9  -0.3  -0.2   26.3  79.3    -9.3     46  0.2
  6000   21.5  70.7   215   17    9  -3.3  -1.8   25.5  77.9   -10.1     42  0.2
  5750   21.0  69.8   210   14    7  -8.9  -4.9   24.3  75.7   -11.4     53  0.3
  5500   20.1  68.2   205   10    5  -9.3  -5.1   22.8  73.1   -13.0     70  0.4

 * * * * * * Numerical weather prediction model forecast data valid * * * * * *

           07/25/2016 at 0900 MDT          |       07/25/2016 at 1200 MDT
                                           |
K index... +16.0  LI... -3.3               | K index... +14.6  LI... -5.1
CAPE... +633.3  CIN... -201.3              | CAPE... +1294.2  CIN... -38.9
                                           |
Height Temperature  Wnd WndSpd  Lapse Rate | Temperature  Wnd WndSpd  Lapse Rate
ft MSL deg C deg F  Dir kt m/s  C/km F/kft | deg C deg F  Dir kt m/s  C/km F/kft
--------------------------------------------------------------------------------
 50000 -63.9 -83.0  280  16  8   1.9   1.0 | -63.8 -82.8  265  11  6   1.9   1.0
 45000 -59.2 -74.6  270  27 14   5.2   2.9 | -59.1 -74.4  260  22 11   5.3   2.9
 40000 -51.1 -60.0  260  39 20   6.2   3.4 | -51.0 -59.8  255  38 20   6.1   3.4
 38000 -47.4 -53.3  260  43 22   6.2   3.4 | -47.3 -53.1  260  42 22   6.1   3.4
 36000 -43.7 -46.7  265  48 25   6.6   3.6 | -43.1 -45.6  260  47 24   8.4   4.6
 34000 -38.1 -36.6  265  45 23   8.5   4.6 | -37.8 -36.0  265  44 23   8.8   4.8
 32000 -33.0 -27.4  265  43 22   8.2   4.5 | -32.5 -26.5  265  41 21   8.4   4.6
 30000 -28.8 -19.8  265  36 19   7.0   3.8 | -28.5 -19.3  265  34 18   6.6   3.6
 29000 -26.7 -16.1  260  32 17   7.0   3.8 | -26.5 -15.7  260  31 16   6.6   3.6
 28000 -24.7 -12.5  260  29 15   6.3   3.4 | -24.5 -12.1  260  28 14   5.9   3.3
 27000 -22.8  -9.0  265  25 13   6.3   3.5 | -22.7  -8.9  260  25 13   6.0   3.3
 26000 -20.9  -5.6  265  22 11   6.3   3.5 | -21.0  -5.8  260  23 12   6.1   3.3
 25000 -19.0  -2.2  270  18  9   6.0   3.3 | -19.2  -2.6  265  20 10   6.0   3.3
 24000 -17.3   0.9  270  15  8   5.8   3.2 | -17.3   0.9  270  18  9   6.0   3.3
 23000 -15.6   3.9  275  13  7   5.8   3.2 | -15.5   4.1  275  16  8   6.1   3.3
 22000 -13.8   7.2  285  10  5   7.4   4.0 | -13.6   7.5  285  15  8   7.5   4.1
 21000 -11.4  11.5  300   9  5   8.1   4.4 | -11.2  11.8  290  15  7   8.1   4.4
 20000  -9.0  15.8  320   9  5   8.1   4.5 |  -8.8  16.2  295  15  8   8.1   4.5
 19500  -7.8  18.0  325   9  5   8.2   4.5 |  -7.6  18.3  295  15  8   8.1   4.5
 19000  -6.5  20.3  330   9  5   8.6   4.7 |  -6.4  20.5  300  14  7   8.0   4.4
 18500  -5.2  22.6  330   9  5   8.7   4.7 |  -5.2  22.6  305  14  7   8.0   4.4
 18000  -4.0  24.8  330   9  5   8.3   4.5 |  -3.3  26.1  310  13  7   8.8   4.8
 17500  -2.2  28.0  325   8  4   8.2   4.5 |  -2.0  28.4  315  12  6   8.8   4.8
 17000  -1.0  30.2  320   8  4   8.6   4.7 |  -0.8  30.6  320  12  6   8.9   4.9
 16500   0.3  32.5  315   7  4   8.7   4.8 |   0.5  32.9  320  11  6   9.0   4.9
 16000   1.6  34.9  310   7  4   8.7   4.8 |   1.8  35.2  325  11  6   9.0   4.9
 15500   2.9  37.2  305   7  4   8.8   4.8 |   3.1  37.6  325  11  5   8.9   4.9
 15000   4.2  39.6  300   7  4   8.8   4.8 |   4.4  39.9  325  10  5   8.9   4.9
 14500   5.5  41.9  300   7  4   9.3   5.1 |   5.8  42.4  325  10  5   9.5   5.2
 14000   6.9  44.4  295   7  4   9.3   5.1 |   7.2  45.0  325  10  5   9.5   5.2
 13500   8.3  46.9  290   7  3   8.8   4.8 |   8.5  47.3  325   9  5   8.6   4.7
 13000   9.6  49.3  290   6  3   8.8   4.8 |   9.8  49.6  320   9  5   8.6   4.7
 12500  10.9  51.6  285   6  3   8.4   4.6 |  11.1  52.0  320   8  4   8.6   4.7
 12000  12.1  53.8  280   5  3   8.3   4.6 |  12.4  54.3  315   7  4   8.6   4.7
 11500  13.3  55.9  270   4  2   7.9   4.3 |  13.6  56.5  310   6  3   8.0   4.4
 11000  14.4  57.9  245   4  2   7.5   4.1 |  14.7  58.5  300   4  2   7.7   4.2
 10500  15.4  59.7  225   4  2   2.8   1.5 |  15.8  60.4  280   3  2   3.4   1.9
 10250  15.5  59.9  220   4  2   5.2   2.9 |  15.9  60.6  270   3  2   6.0   3.3
 10000  16.2  61.2  215   5  2  11.5   6.3 |  16.6  61.9  250   3  1  11.2   6.1
  9750  16.9  62.4  210   5  3  10.1   5.6 |  17.4  63.3  230   3  2   9.9   5.4
  9500  17.5  63.5  205   6  3   7.6   4.2 |  18.0  64.4  215   4  2   7.1   3.9
  9250  17.9  64.2  205   6  3   5.6   3.1 |  18.3  64.9  205   4  2   5.7   3.1
  9000  18.4  65.1  205   6  3   8.2   4.5 |  18.8  65.8  195   4  2   8.9   4.9
  8750  18.9  66.0  205   7  3   8.9   4.9 |  19.3  66.7  180   5  3   9.6   5.3
  8500  19.5  67.1  205   7  4   8.3   4.5 |  19.9  67.8  175   6  3   8.8   4.8
  8250  20.1  68.2  205   7  4   8.1   4.4 |  20.4  68.7  170   5  3   8.3   4.6
  8000  20.6  69.1  210   8  4   8.0   4.4 |  21.0  69.8  165   5  3   9.1   5.0
  7750  21.2  70.2  210   8  4   6.2   3.4 |  21.6  70.9  160   5  3   9.9   5.4
  7500  21.5  70.7  210   9  5   3.6   2.0 |  22.3  72.1  160   5  3  10.0   5.5
  7250  21.7  71.1  210   9  5   2.7   1.5 |  23.0  73.4  160   5  3  10.1   5.5
  7000  21.8  71.2  210  10  5   3.2   1.7 |  23.7  74.7  160   5  3   9.9   5.4
  6750  22.0  71.6  205  11  6   2.0   1.1 |  24.4  75.9  160   5  3  10.1   5.5
  6500  22.0  71.6  205   9  5   1.1   0.6 |  25.2  77.4  160   5  3  10.5   5.8
  6250  22.0  71.6  200   7  4   0.7   0.4 |  26.0  78.8  155   5  2  10.1   5.5
  6000  22.0  71.6  200   5  3   3.1   1.7 |  26.8  80.2  155   5  2  11.7   6.4
  5750  22.4  72.3  195   4  2  11.5   6.3 |  27.8  82.0  155   4  2  18.3  10.0
  5500  23.6  74.5  190   4  2  18.1  10.0 |  29.4  84.9  155   4  2  24.1  13.2

           07/25/2016 at 1500 MDT          |       07/25/2016 at 1800 MDT
                                           |
K index... +21.3  LI... -3.7               | K index... +33.8  LI... -3.8
CAPE... +757.3  CIN... -14.5               | CAPE... +735.1  CIN... M
                                           |
Height Temperature  Wnd WndSpd  Lapse Rate | Temperature  Wnd WndSpd  Lapse Rate
ft MSL deg C deg F  Dir kt m/s  C/km F/kft | deg C deg F  Dir kt m/s  C/km F/kft
--------------------------------------------------------------------------------
 50000 -64.4 -83.9  240  18  9   2.3   1.3 | -64.4 -83.9  255  21 11   1.7   0.9
 45000 -59.2 -74.6  245  28 15   5.6   3.1 | -59.4 -74.9  250  33 17   6.0   3.3
 40000 -50.2 -58.4  255  41 21   6.2   3.4 | -50.3 -58.5  255  44 23   6.3   3.5
 38000 -46.5 -51.7  255  44 23   6.2   3.4 | -46.5 -51.7  260  48 25   6.3   3.5
 36000 -42.7 -44.9  255  47 24   7.7   4.2 | -42.1 -43.8  265  53 27   7.9   4.3
 34000 -37.6 -35.7  260  46 24   8.5   4.7 | -37.3 -35.1  265  50 26   8.0   4.4
 32000 -32.6 -26.7  265  46 24   8.7   4.8 | -32.5 -26.5  260  48 25   8.5   4.7
 30000 -28.4 -19.1  260  38 20   6.9   3.8 | -27.8 -18.0  270  43 22   7.7   4.2
 29000 -26.3 -15.3  260  34 17   6.9   3.8 | -25.5 -13.9  270  41 21   7.7   4.2
 28000 -23.8 -10.8  260  30 15   6.1   3.4 | -23.4 -10.1  275  38 20   5.7   3.1
 27000 -22.0  -7.6  260  29 15   6.2   3.4 | -21.6  -6.9  280  35 18   5.9   3.2
 26000 -20.2  -4.4  265  29 15   6.2   3.4 | -19.9  -3.8  280  32 16   5.9   3.3
 25000 -18.4  -1.1  265  28 14   6.3   3.5 | -18.1  -0.6  290  29 15   6.2   3.4
 24000 -16.5   2.3  275  28 14   6.4   3.5 | -16.2   2.8  295  26 13   6.5   3.6
 23000 -14.6   5.7  280  28 14   6.4   3.5 | -14.3   6.3  300  23 12   6.5   3.6
 22000 -12.6   9.3  285  27 14   7.4   4.1 | -12.4   9.7  310  21 11   6.8   3.7
 21000 -10.4  13.3  295  24 13   7.6   4.2 | -10.4  13.3  315  19 10   7.0   3.8
 20000  -8.2  17.2  305  22 11   7.6   4.2 |  -8.4  16.9  320  18  9   7.0   3.8
 19500  -7.1  19.2  310  21 11   7.9   4.3 |  -7.3  18.9  320  17  9   7.1   3.9
 19000  -5.9  21.4  315  20 10   8.2   4.5 |  -6.2  20.8  325  16  8   7.8   4.3
 18500  -4.7  23.5  315  18 10   8.2   4.5 |  -5.1  22.8  330  16  8   7.8   4.3
 18000  -3.4  25.9  320  17  9   8.3   4.6 |  -3.4  25.9  335  15  8   8.0   4.4
 17500  -2.2  28.0  325  16  8   8.3   4.6 |  -2.2  28.0  340  14  7   8.0   4.4
 17000  -0.9  30.4  330  15  8   8.4   4.6 |  -1.0  30.2  345  13  7   7.5   4.1
 16500   0.3  32.5  330  14  7   8.6   4.7 |   0.0  32.0  350  10  5   7.4   4.1
 16000   1.6  34.9  335  12  6   8.6   4.7 |   1.1  34.0  355   6  3   7.9   4.3
 15500   2.8  37.0  340  11  6   8.2   4.5 |   2.2  36.0  005   3  2   8.9   4.9
 15000   4.6  40.3  345   9  5   8.3   4.5 |   3.4  38.1  115   1  1   8.9   4.9
 14500   5.9  42.6  350   8  4   8.5   4.7 |   4.8  40.6  145   3  1   9.9   5.4
 14000   7.1  44.8  355   6  3   8.5   4.6 |   6.2  43.2  150   3  2   9.8   5.4
 13500   8.3  46.9  005   4  2   9.0   4.9 |   7.6  45.7  150   4  2   9.5   5.2
 13000   9.6  49.3  025   3  2   9.1   5.0 |   9.0  48.2  150   4  2   9.5   5.2
 12500  10.8  51.4  055   2  1   9.6   5.3 |  10.4  50.7  150   5  2   9.8   5.4
 12000  12.2  54.0  100   2  1   9.8   5.4 |  11.9  53.4  155   5  2  10.0   5.5
 11500  13.5  56.3  125   3  2   9.5   5.2 |  13.4  56.1  155   5  3   9.8   5.4
 11000  14.8  58.6  135   4  2   9.5   5.2 |  14.8  58.6  155   5  3   9.6   5.3
 10500  16.0  60.8  140   4  2   5.1   2.8 |  16.2  61.2  155   5  3   5.1   2.8
 10250  16.4  61.5  140   4  2   8.8   4.8 |  16.5  61.7  155   5  3   7.4   4.1
 10000  17.2  63.0  140   4  2  13.2   7.2 |  17.4  63.3  155   5  3  13.3   7.3
  9750  18.1  64.6  140   4  2  12.1   6.6 |  18.3  64.9  155   5  3  12.2   6.7
  9500  18.9  66.0  140   4  2   9.0   4.9 |  19.2  66.6  155   5  3   9.3   5.1
  9250  19.5  67.1  140   4  2   8.2   4.5 |  19.7  67.5  155   5  3   8.0   4.4
  9000  20.2  68.4  140   4  2  11.3   6.2 |  20.5  68.9  155   5  3  11.1   6.1
  8750  21.0  69.8  145   4  2  11.2   6.2 |  21.3  70.3  155   5  3  11.3   6.2
  8500  21.8  71.2  145   4  2  10.2   5.6 |  22.1  71.8  160   5  3  10.4   5.7
  8250  22.6  72.7  145   4  2   9.6   5.3 |  22.9  73.2  160   6  3  10.0   5.5
  8000  23.3  73.9  145   4  2   9.7   5.3 |  23.6  74.5  155   6  3   9.6   5.3
  7750  24.0  75.2  145   4  2   9.7   5.3 |  24.3  75.7  160   5  3   9.3   5.1
  7500  24.7  76.5  145   4  2  10.1   5.5 |  25.1  77.2  160   5  3  10.1   5.5
  7250  25.5  77.9  145   4  2  10.4   5.7 |  25.8  78.4  160   5  3  10.4   5.7
  7000  26.3  79.3  145   4  2   9.7   5.3 |  26.6  79.9  160   5  3  10.3   5.7
  6750  27.0  80.6  145   4  2   9.9   5.5 |  27.3  81.1  160   5  3  10.3   5.7
  6500  27.8  82.0  145   4  2  11.0   6.0 |  28.1  82.6  160   5  3  10.2   5.6
  6250  28.6  83.5  145   4  2  11.4   6.3 |  28.9  84.0  160   5  3  10.4   5.7
  6000  29.4  84.9  145   4  2  10.1   5.5 |  29.7  85.5  160   5  3   9.5   5.2
  5750  30.2  86.4  145   4  2  16.3   8.9 |  30.4  86.7  160   5  3  13.0   7.1
  5500  31.9  89.4  150   4  2  30.1  16.5 |  31.6  88.9  160   5  3  21.6  11.8
________________________________________________________________________________

This product is issued twice per day, once by approximately 0630 MST/0730 MDT
(1330 UTC) and again by approximately 1830 MST/1930 MDT (0130 UTC).  It is not
continuously monitored nor updated after its initial issuance.

The information contained herein is based on rawinsonde observation and/or
numerical weather prediction model data taken near the old Stapleton
Airport site in Denver, Colorado at

                   North Latitude:  39 deg 46 min 5.016 sec
                   West Longitude: 104 deg 52 min 9.984 sec
                   Elevation: 5285 feet (1611 meters)

and may not be representative of other areas along the Front Range of the
Colorado Rocky Mountains.  Note that some elevations in numerical weather
prediction models differ from actual station elevations, which can lead to
data which appear to be below ground.  Erroneous data such as these should
not be used.

The content and format of this report as well as the issuance times are subject
to change without prior notice.  Comments and suggestions are welcome and should
be directed to one of the addresses or phone numbers shown at the bottom of this
page.  To expedite a response to comments, be sure to mention your interest in
the soaring forecast.

DEFINITIONS:

CAPE (Convective Available Potential Energy) - An integrated measure of the
     energy available for convective development, also known as the positive
     area on a thermodynamic diagram.  Units are Joules per kilogram.  Larger
     values are indicative of greater instability and the possibility of
     stronger convective activity, including thunderstorms.  Values around or
     greater than 1000 suggest the possibility of severe weather should
     convective activity develop.

CIN (Convective Inhibition) - An integrated measure of the amount of energy
     needed to initiate convective activity, also known as the negative area on
     a thermodynamic diagram.  Units are Joules per kilogram.  The more negative
     this number, the more energy is required to initiate convection.  This
     inhibitive energy can be overcome through surface heating, cooling aloft,
     lifting mechanisms (orographic, frontal, gravity waves, etc.)

Convective Condensation Level - The height to which an air parcel possessing the
     average saturation mixing ratio in the lowest 4000 feet of the airmass,
     if heated sufficiently from below, will rise dry adiabatically until it
     just becomes saturated.  It estimates the base of cumulus clouds that are
     produced by surface heating only.

Convection Temperature (ConvectionT) - The surface temperature required to make
     the airmass dry adiabatic up to the given level.  It can be considered a
     "trigger temperature" for that level.

Freezing Level - The height where the temperature is zero degrees Celsius.

Height of Stable Layer - The height (between 12,000 and 18,000 feet above
     mean sea level) where the smallest lapse rate exists.  The location and
     existence of this feature is important in the generation of mountain
     waves.

K Index - A measure of stability which combines the temperature difference
     between approximately 5,000 and 18,000 feet above the surface, the amount
     of moisture at approximately 5,000 feet above the surface, and a measure
     of the dryness at approximately 10,000 feet above the surface.  Larger
     positive numbers indicate more instability and a greater likelihood of
     thunderstorm development.  One interpretation of K index values regarding
     soaring in the western United States is given in WMO Technical Note 158
     and is reproduced in the following table:

          below -10    no or weak thermals
           -10 to 5    dry thermals or 1/8 cumulus with moderate thermals
            5 to 15    good soaring conditions
           15 to 20    good soaring conditions with occasional showers
           20 to 30    excellent soaring conditions, but increasing
                       probability of showers and thunderstorms
           above 30    more than 60 percent probability of thunderstorms

Lapse Rate - The change with height of the temperature. Negative values indicate
     inversions.

Lifted Condensation Level - The height to which an air parcel possessing the
     average dew point in the lowest 4000 feet of the airmass and the forecast
     maximum temperature must be lifted dry adiabatically to attain saturation.

Lifted Index (LI) - The difference between the environmental temperature at a
     level approximately 18,000 feet above the surface and the temperature of
     an air parcel lifted dry adiabatically from the surface to its lifted
     condensation level and then pseudoadiabatically thereafter to this same
     level.  The parcel`s initial temperature is the forecast maximum
     temperature and its dew point is the average dew point in the lowest 4000
     feet of the airmass.  Negative values are indicative of instability with
     positive values showing stable conditions.

Lift Rate - An experimental estimate of the strength of thermals.  It is
     computed the same way as the maximum rate of lift but uses the actual
     level rather than the maximum height of thermals in the calculation.
     Also, none of the empirical adjustments based on cloudiness and K-index
     are applied to these calculations.

Maximum Height of Thermals - The height where the dry adiabat through the
     forecast maximum temperature intersects the environmental temperature.

Maximum Rate of Lift - An estimate of the maximum strength of thermals.  It
     is computed from an empirical formula which combines the expected maximum
     height of thermals with the difference in the environmental temperatures
     between the maximum height of thermals and the temperature 4,000 feet
     above the ground.  After this computation, further empirical adjustments
     are made based on the value of the K-index and the amount and opacity of
     middle and high level cloudiness expected between the time of trigger
     temperature and the time of overdevelopment.

Middle/High Clouds - The amount and opacity of middle (altostratus, altocumulus)
     or high (cirrus, cirrostratus, cirrocumulus) clouds.  Broken means that
     between 60% and 90% of the sky is covered by the cloud, with overcast
     conditions occurring when more than 90% of the sky is covered by the cloud.
     Thin implies that the clouds are predominantly transparent, meaning that
     some sunlight is reaching the ground, in contrast to opaque which suggests
     that little sunlight is reaching the ground.

Potential Height of Wave - The minimum of the following two heights:
     1. Level above the height of stable layer (or 14,000 feet if none exists)
        where the wind direction changes by 30 degrees or more
     2. Level above the height of stable layer (or 14,000 feet if none exists)
        where the wind speed no longer increases with height

PVA/NVA - Positive vorticity advection (PVA)/negative vorticity advection (NVA)
     on the 500 millibar isobaric surface (approximately 18,000 feet above mean
     sea level).  Weak PVA has been shown to assist in mountain wave soaring.

Soaring Window - The time between the time the trigger temperature is reached
                 and the time of overdevelopment.

Thermal Index - The difference between the environmental temperature and the
     temperature at a particular level determined by following the dry adiabat
     through the forecast maximum temperature up to that level.  Negative values
     are indicative of thermal lift.

Thermal Soaring Index - An adjective rating (for sailplanes) based on the
     computed maximum rate of lift, and the wind speed and middle and high
     cloud cover expected during the soaring window (the time of the trigger
     temperature and the time of overdevelopment) according to the following:

                 Maximum rate of lift        Adjective Rating
                      >= 800 fpm                 Excellent
                 >= 400 and < 800 fpm              Good
                 >= 200 and < 400 fpm              Fair
                       < 200 fpm                   Poor

Time of Overdevelopment - The time one or more of the following phenomena,
     which essentially shut off thermal lift, is expected to occur:
     1. formation of broken to overcast convective cloud cover
     2. formation of scattered to numerous downbursts
     3. initiation of widespread precipitation

Time of Trigger Temperature - The time the surface temperature is expected to
     reach the trigger temperature.

Trigger Temperature - The surface temperature required to make the first 4000
     feet of the atmosphere dry adiabatic.

Wave Soaring Index - An empirical, adjective rating (for sailplanes) which
     attempts to combine a variety of phenomena important in mountain wave
     soaring into a single index number.  Objective points are assigned to
     these phenomena: wind speed and direction at 14,000 ft MSL, the static
     stability in the 12,000-18,000 ft MSL layer, the wind speed gradient above
     the stable layer, jet stream location and frontal and upper trough
     movements.

042613



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