Soaring Guidance
Issued by NWS Denver/Boulder, CO

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000
UXUS97 KBOU 301254
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
0654 MDT Tuesday, June 30, 2015

This forecast is for Tuesday, June 30, 2015:

If the trigger temperature of 83.3 F/28.5 C is reached...then
   Thermal Soaring Index....................... Good
   Maximum rate of lift........................ 633 ft/min (3.2 m/s)
   Maximum height of thermals.................. 15462 ft MSL (10177 ft AGL)

Forecast maximum temperature................... 95.0 F/35.5 C
Time of trigger temperature.................... 1030 MDT
Time of overdevelopment........................ 1800 MDT
Middle/high clouds during soaring window....... Broken/overcast thin middle
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 12952 ft MSL (7666 ft AGL)
Thermal soaring outlook for Wednesday 07/01.... Good

Wave Soaring Index............................. Poor
Wave Soaring Index trend (to 1800 MDT)......... Improving
Height of stable layer (12-18K ft MSL)......... 12915 ft MSL (7630 ft AGL)
Weak PVA/NVA (through 1800 MDT)................ Neither
Potential height of wave....................... 19069 ft MSL (13784 ft AGL)
Wave soaring outlook for Wednesday 07/01....... Poor

Remarks...

Sunrise/Sunset.................... 05:34:44 / 20:31:31 MDT
Total possible sunshine........... 14 hr 56 min 47 sec (896 min 47 sec)
Altitude of sun at 13:03:10 MDT... 73.35 degrees

Upper air data from rawinsonde observation taken on 06/30/2015 at 0600 MDT

Freezing level.................. 17471 ft MSL (12186 ft AGL)
Convective condensation level... 17902 ft MSL (12617 ft AGL)
Lifted condensation level....... 17262 ft MSL (11976 ft AGL)
Lifted index.................... -1.7
K index......................... +13.9

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   350   21   11   5.0   2.7   85.2 185.3    29.3      M    M
 45000  -62.5 -80.5   020   38   20   5.0   2.8   63.1 145.5    17.6      M    M
 40000  -55.0 -67.0   015   37   19   9.2   5.0   51.7 125.1    11.3      M    M
 38000  -49.6 -57.3   025   32   16   8.0   4.4   51.2 124.2    11.2      M    M
 36000  -44.3 -47.7   010   26   13   9.7   5.3   50.4 122.7    10.9      M    M
 34000  -39.5 -39.1   010   18    9   7.7   4.2   49.0 120.1    10.1      M    M
 32000  -34.4 -29.9   320   24   12  10.2   5.6   47.9 118.3     9.6      M    M
 30000  -28.5 -19.3   325   23   12   8.0   4.4   47.1 116.7     9.2      M    M
 29000  -26.1 -15.0   340   22   11   8.0   4.4   46.4 115.4     8.8      M    M
 28000  -23.6 -10.5   350   22   11   8.6   4.7   45.8 114.5     8.4      M    M
 27000  -21.1  -6.0   350   21   11   8.5   4.7   45.3 113.5     8.1      M    M
 26000  -18.5  -1.3   345   21   11   9.0   4.9   44.9 112.8     7.8      M    M
 25000  -16.8   1.8   345   20   10   4.6   2.5   43.4 110.1     6.7      M    M
 24000  -14.8   5.4   340   18    9   9.5   5.2   42.3 108.2     5.9      M    M
 23000  -12.5   9.5   335   17    9   7.0   3.9   41.6 106.9     5.4      M    M
 22000  -11.1  12.0   340   18    9   9.2   5.0   39.8 103.7     3.9      M    M
 21000   -8.6  16.5   340   19   10   8.5   4.6   39.4 103.0     3.6      M    M
 20000   -6.0  21.2   355   18    9   8.4   4.6   39.0 102.1     3.2      M    M
 19500   -4.8  23.4   350   20   10   8.3   4.5   38.7 101.7     3.0      M    M
 19000   -3.6  25.5   350   20   10   7.6   4.1   38.3 101.0     2.7      M    M
 18500   -2.5  27.5   350   21   11   7.6   4.2   38.0 100.3     2.4      M    M
 18000   -1.4  29.5   350   21   11   7.6   4.2   37.6  99.7     2.0      M    M
 17500   -0.3  31.5   350   22   11   7.6   4.2   37.2  99.0     1.7      M    M
 17000    0.8  33.4   350   22   11   7.7   4.2   36.9  98.5     1.4      M    M
 16500    2.0  35.6   350   21   11   7.7   4.2   36.6  97.8     1.1      M    M
 16000    3.1  37.6   355   19   10   7.9   4.3   36.2  97.2     0.7      M    M
 15500    4.1  39.4   345   17    9   5.3   2.9   35.7  96.3     0.2      M    M
 15000    5.2  41.4   330   16    8   4.5   2.5   34.6  94.2    -0.8    789  4.0
 14500    6.2  43.2   335   16    8   7.1   3.9   33.8  92.8    -1.3    744  3.8
 14000    7.3  45.1   335   16    8   7.9   4.3   33.5  92.2    -1.6    696  3.5
 13500    8.5  47.3   330   15    8   7.3   4.0   33.2  91.7    -2.0    647  3.3
 13000    8.8  47.8   330   14    7   1.2   0.7   32.1  89.9    -3.1    622  3.2
 12500    8.8  47.8   345   10    5   4.7   2.6   30.9  87.5    -4.6    607  3.1
 12000    9.9  49.8   005    8    4   9.2   5.0   30.7  87.2    -5.0    559  2.8
 11500   11.2  52.2   350    7    3   9.2   5.1   30.6  87.0    -5.2    506  2.6
 11000   12.5  54.5   330    6    3   8.9   4.9   30.5  86.8    -5.4    452  2.3
 10500   13.8  56.8   310    6    3   8.4   4.6   30.3  86.6    -5.5    397  2.0
 10250   14.4  57.9   310    5    3   7.9   4.3   30.2  86.3    -5.7    372  1.9
 10000   15.0  59.0   310    4    2   8.0   4.4   30.1  86.1    -5.8    347  1.8
  9750   15.6  60.1   310    3    2   8.0   4.4   29.9  85.9    -6.0    322  1.6
  9500   16.2  61.2   310    2    1   8.0   4.4   29.8  85.6    -6.1    297  1.5
  9250   16.8  62.2   310    1    0   8.0   4.4   29.7  85.4    -6.3    272  1.4
  9000   17.4  63.3   000    0    0   8.0   4.4   29.6  85.2    -6.4    247  1.3
  8750   17.9  64.2   200    2    1   8.0   4.4   29.4  85.0    -6.6    222  1.1
  8500   18.5  65.3   200    4    2   8.0   4.4   29.3  84.7    -6.7    197  1.0
  8250   19.1  66.4   200    5    3   8.0   4.4   29.2  84.5    -6.9    173  0.9
  8000   19.7  67.5   200    7    4   8.0   4.4   29.0  84.3    -7.0    148  0.8
  7750   20.3  68.5   195    7    3   8.0   4.4   28.9  84.0    -7.2    123  0.6
  7500   20.9  69.6   190    6    3   8.0   4.4   28.8  83.8    -7.4     98  0.5
  7250   21.4  70.5   180    6    3   7.9   4.3   28.6  83.5    -7.5     73  0.4
  7000   22.0  71.6   175    6    3   8.4   4.6   28.5  83.3    -7.7     48  0.2
  6750   22.6  72.7   190    7    4   6.6   3.6   28.3  83.0    -7.9     23  0.1
  6500   22.7  72.9   205    9    5  -6.8  -3.7   27.7  81.9    -8.5     13  0.1
  6250   21.8  71.2   210   12    6 -10.2  -5.6   26.1  79.0   -10.2     32  0.2
  6000   21.5  70.7   215   14    7   2.4   1.3   25.1  77.2   -11.2     34  0.2
  5750   21.4  70.5   215   10    5 -13.0  -7.2   24.3  75.7   -12.1     30  0.2
  5500   19.0  66.2   215    5    2 -48.9 -26.8   21.1  70.1   -15.3     95  0.5

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

           06/30/2015 at 0900 MDT          |       06/30/2015 at 1200 MDT
                                           |
K index... +17.0  LI... -0.5               | K index... +20.8  LI... -2.1
CAPE... +158.1  CIN... -219.5              | CAPE... +639.8  CIN... -81.2
                                           |
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 -66.1 -87.0  355  22 12   1.1   0.6 | -66.7 -88.1  350  22 11   0.7   0.4
 45000 -62.1 -79.8  005  31 16   5.3   2.9 | -62.7 -80.9  355  30 15   6.0   3.3
 40000 -53.4 -64.1  010  35 18   8.1   4.4 | -53.1 -63.6  005  31 16   8.1   4.4
 38000 -48.6 -55.5  005  34 17   8.1   4.4 | -48.2 -54.8  005  28 15   8.1   4.4
 36000 -43.7 -46.7  005  32 17   8.4   4.6 | -43.3 -45.9  360  26 13   8.4   4.6
 34000 -38.5 -37.3  005  29 15   8.8   4.8 | -38.2 -36.8  350  21 11   8.6   4.7
 32000 -32.6 -26.7  360  25 13   8.8   4.8 | -32.3 -26.1  335  18  9   8.8   4.8
 30000 -27.9 -18.2  355  23 12   7.9   4.3 | -27.5 -17.5  335  18  9   8.1   4.4
 29000 -25.5 -13.9  350  22 11   7.9   4.3 | -25.1 -13.2  335  18  9   8.1   4.4
 28000 -23.3  -9.9  350  21 11   6.7   3.7 | -22.9  -9.2  330  18  9   6.6   3.6
 27000 -21.3  -6.3  350  20 10   6.7   3.7 | -20.9  -5.6  330  18  9   6.7   3.7
 26000 -19.2  -2.6  345  19 10   6.7   3.7 | -18.9  -2.0  330  18 10   6.7   3.7
 25000 -17.2   1.0  345  18  9   6.8   3.7 | -16.9   1.6  325  19 10   6.8   3.7
 24000 -15.2   4.6  345  18  9   6.8   3.7 | -14.8   5.4  330  19 10   6.8   3.8
 23000 -13.2   8.2  345  19 10   6.8   3.7 | -12.8   9.0  330  19 10   6.9   3.8
 22000 -11.1  12.0  345  19 10   7.3   4.0 | -10.8  12.6  335  19 10   7.0   3.8
 21000  -8.9  16.0  350  19 10   7.4   4.1 |  -8.7  16.3  340  19 10   7.0   3.8
 20000  -6.7  19.9  350  20 10   7.4   4.1 |  -6.6  20.1  340  20 10   7.0   3.8
 19500  -5.6  21.9  350  20 10   7.5   4.1 |  -5.6  21.9  345  20 10   7.1   3.9
 19000  -4.4  24.1  350  20 10   8.1   4.4 |  -4.5  23.9  345  20 11   7.6   4.2
 18500  -3.2  26.2  350  19 10   8.1   4.4 |  -3.4  25.9  345  21 11   7.6   4.2
 18000  -2.1  28.2  350  19 10   7.9   4.3 |  -2.2  28.0  350  21 11   8.2   4.5
 17500  -0.9  30.4  350  19 10   7.8   4.3 |  -1.0  30.2  350  22 11   8.4   4.6
 17000   0.2  32.4  350  19 10   7.7   4.2 |   0.2  32.4  350  23 12   8.4   4.6
 16500   1.8  35.2  345  18  9   7.3   4.0 |   2.0  35.6  355  24 12   8.5   4.7
 16000   2.9  37.2  345  18  9   7.3   4.0 |   3.2  37.8  355  24 13   8.5   4.7
 15500   4.0  39.2  340  18  9   7.5   4.1 |   4.4  39.9  355  24 13   8.4   4.6
 15000   5.1  41.2  340  17  9   7.5   4.1 |   5.6  42.1  355  24 12   8.5   4.6
 14500   6.2  43.2  335  17  9   7.7   4.2 |   6.8  44.2  350  24 12   8.1   4.4
 14000   7.3  45.1  335  16  8   7.8   4.3 |   8.0  46.4  350  23 12   8.1   4.5
 13500   8.3  46.9  335  15  8   8.1   4.5 |   9.2  48.6  350  22 11   8.4   4.6
 13000   9.5  49.1  330  14  7   8.2   4.5 |  10.5  50.9  345  21 11   8.5   4.7
 12500  10.6  51.1  330  12  6   8.7   4.7 |  11.9  53.4  345  20 10   8.2   4.5
 12000  11.9  53.4  325  11  6   8.8   4.8 |  13.1  55.6  340  18  9   8.0   4.4
 11500  13.1  55.6  320  10  5   8.2   4.5 |  14.3  57.7  340  15  8   7.9   4.3
 11000  14.2  57.6  315   9  4   7.5   4.1 |  15.4  59.7  340  13  7   7.7   4.2
 10500  15.3  59.5  305   8  4   4.2   2.3 |  16.5  61.7  335  11  6   4.6   2.5
 10250  15.5  59.9  305   8  4   4.7   2.6 |  16.7  62.1  335  11  6   5.9   3.2
 10000  16.1  61.0  295   7  4   9.5   5.2 |  17.4  63.3  335  10  5  11.0   6.0
  9750  16.7  62.1  285   6  3   8.8   4.8 |  18.1  64.6  330   9  5  10.2   5.6
  9500  17.3  63.1  270   6  3   6.9   3.8 |  18.9  66.0  330   9  5   8.5   4.7
  9250  17.7  63.9  265   6  3   5.6   3.1 |  19.3  66.7  330   8  4   7.0   3.8
  9000  18.3  64.9  260   6  3   8.3   4.6 |  19.9  67.8  330   8  4   8.7   4.8
  8750  18.9  66.0  250   6  3   9.2   5.0 |  20.5  68.9  325   7  4   9.1   5.0
  8500  19.5  67.1  245   7  3   8.0   4.4 |  21.1  70.0  325   7  3   8.0   4.4
  8250  20.1  68.2  235   7  4   7.3   4.0 |  21.6  70.9  325   5  3   7.0   3.9
  8000  20.6  69.1  225   8  4   7.1   3.9 |  22.1  71.8  320   4  2   7.4   4.0
  7750  21.1  70.0  215   9  5   6.5   3.6 |  22.5  72.5  310   2  1   7.5   4.1
  7500  21.6  70.9  210   9  5   6.6   3.6 |  23.1  73.6  285   1  1   8.9   4.9
  7250  22.0  71.6  205   9  5   6.8   3.7 |  23.7  74.7  275   1  0   9.8   5.4
  7000  22.5  72.5  205   9  4   6.4   3.5 |  24.4  75.9  250   1  0   9.7   5.3
  6750  23.0  73.4  200   8  4   4.9   2.7 |  25.2  77.4  230   1  0  10.3   5.7
  6500  23.2  73.8  200   8  4   3.6   2.0 |  25.9  78.6  225   1  0  10.7   5.8
  6250  23.5  74.3  200   7  4   4.8   2.7 |  26.8  80.2  225   1  0  11.3   6.2
  6000  23.7  74.7  200   7  3   0.7   0.4 |  27.6  81.7  220   1  0   9.2   5.1
  5750  23.7  74.7  205   7  3   3.7   2.0 |  28.3  82.9  230   1  0  14.1   7.7
  5500  24.5  76.1  200   5  2  20.6  11.3 |  29.8  85.6  220   1  0  28.4  15.6

           06/30/2015 at 1500 MDT          |       06/30/2015 at 1800 MDT
                                           |
K index... +26.9  LI... -1.4               | K index... +30.6  LI... -2.0
CAPE... +343.6  CIN... -56.7               | CAPE... +475.1  CIN... -29.9
                                           |
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 -66.5 -87.7  355  20 10  -0.0  -0.0 | -66.5 -87.7  330  18  9   0.1   0.1
 45000 -62.9 -81.2  360  30 15   6.5   3.6 | -63.0 -81.4  345  27 14   6.1   3.4
 40000 -52.7 -62.9  355  33 17   8.1   4.4 | -52.9 -63.2  345  34 17   9.1   5.0
 38000 -47.8 -54.0  355  29 15   8.1   4.4 | -47.4 -53.3  335  31 16   9.1   5.0
 36000 -43.0 -45.4  350  24 12   8.5   4.7 | -42.0 -43.6  325  30 15   8.7   4.8
 34000 -37.7 -35.9  345  19 10   8.8   4.9 | -36.9 -34.4  320  28 14   8.5   4.7
 32000 -31.7 -25.1  330  15  8   8.5   4.7 | -31.2 -24.2  315  26 13   8.8   4.8
 30000 -27.0 -16.6  325  18  9   7.9   4.3 | -26.6 -15.9  315  27 14   7.7   4.2
 29000 -24.7 -12.5  325  20 10   7.8   4.3 | -24.3 -11.7  315  28 14   7.7   4.2
 28000 -22.5  -8.5  325  21 11   6.7   3.7 | -22.0  -7.6  315  29 15   7.0   3.8
 27000 -20.5  -4.9  320  22 11   6.8   3.7 | -20.0  -4.0  310  29 15   7.0   3.9
 26000 -18.4  -1.1  315  23 12   6.8   3.7 | -17.9  -0.2  310  29 15   7.0   3.9
 25000 -16.4   2.5  315  24 12   6.7   3.7 | -15.8   3.6  305  29 15   6.6   3.6
 24000 -14.4   6.1  315  24 12   6.7   3.7 | -13.9   7.0  305  28 14   6.5   3.6
 23000 -12.4   9.7  315  23 12   6.8   3.7 | -12.0  10.4  305  27 14   6.5   3.6
 22000 -10.4  13.3  315  23 12   7.0   3.9 | -10.1  13.8  305  26 13   6.6   3.6
 21000  -8.4  16.9  320  23 12   7.2   3.9 |  -8.1  17.4  305  25 13   6.7   3.7
 20000  -6.3  20.7  320  22 11   7.3   4.0 |  -6.2  20.8  305  24 12   6.7   3.7
 19500  -5.3  22.5  320  22 11   7.4   4.1 |  -5.3  22.5  305  24 12   6.9   3.8
 19000  -4.2  24.4  320  22 11   8.0   4.4 |  -4.2  24.4  305  24 12   7.8   4.3
 18500  -3.1  26.4  320  21 11   8.0   4.4 |  -3.1  26.4  300  24 12   7.8   4.3
 18000  -2.0  28.4  325  21 11   8.1   4.5 |  -2.0  28.4  300  24 12   8.0   4.4
 17500  -0.8  30.6  325  20 10   8.2   4.5 |  -0.8  30.6  300  24 12   8.2   4.5
 17000   1.0  33.8  330  20 10   8.6   4.7 |   1.0  33.8  300  23 12   9.0   4.9
 16500   2.2  36.0  330  19 10   8.7   4.8 |   2.3  36.1  300  22 12   9.3   5.1
 16000   3.5  38.3  330  19 10   8.7   4.8 |   3.6  38.5  305  21 11   9.3   5.1
 15500   4.8  40.6  325  18  9   8.6   4.7 |   4.9  40.8  305  20 10   9.0   5.0
 15000   6.1  43.0  325  18  9   8.6   4.7 |   6.3  43.3  305  19 10   9.0   5.0
 14500   7.4  45.3  325  17  9   8.8   4.8 |   7.6  45.7  305  18  9   9.2   5.1
 14000   8.7  47.7  325  16  8   8.8   4.8 |   9.0  48.2  310  16  8   9.2   5.1
 13500  10.0  50.0  330  15  8   8.7   4.8 |  10.3  50.5  310  15  8   8.9   4.9
 13000  11.3  52.3  330  15  8   8.7   4.8 |  11.6  52.9  310  14  7   8.9   4.9
 12500  12.5  54.5  335  14  7   9.1   5.0 |  12.9  55.2  315  13  7   9.0   4.9
 12000  13.9  57.0  340  14  7   9.3   5.1 |  14.3  57.7  315  11  6   9.1   5.0
 11500  15.2  59.4  340  13  7   8.9   4.9 |  15.7  60.3  320  10  5   8.8   4.8
 11000  16.6  61.9  345  12  6   8.2   4.5 |  16.9  62.4  320   7  4   8.1   4.5
 10500  17.9  64.2  350  10  5   5.1   2.8 |  18.2  64.8  320   5  2   5.7   3.2
 10250  18.1  64.6  350  10  5   5.5   3.0 |  18.5  65.3  320   4  2   6.6   3.6
 10000  18.8  65.8  355   8  4   9.8   5.4 |  19.2  66.6  305   3  1  10.3   5.7
  9750  19.5  67.1  355   6  3   9.0   4.9 |  19.9  67.8  275   2  1   9.8   5.4
  9500  20.2  68.4  005   4  2   7.8   4.3 |  20.6  69.1  220   2  1   8.4   4.6
  9250  20.7  69.3  015   2  1   7.4   4.1 |  21.2  70.2  205   2  1   7.9   4.3
  9000  21.3  70.3  035   1  1   9.4   5.2 |  21.9  71.4  205   3  1   9.8   5.4
  8750  21.9  71.4  085   1  0   9.4   5.2 |  22.6  72.7  205   3  2   9.8   5.4
  8500  22.6  72.7  140   1  1   9.7   5.3 |  23.3  73.9  205   3  2   9.8   5.4
  8250  23.3  73.9  145   1  1  10.0   5.5 |  24.0  75.2  205   3  2   9.9   5.4
  8000  24.0  75.2  145   1  1   9.9   5.4 |  24.8  76.6  205   4  2   9.8   5.4
  7750  24.7  76.5  150   2  1   9.9   5.4 |  25.5  77.9  205   4  2   9.8   5.4
  7500  25.5  77.9  150   2  1  10.0   5.5 |  26.2  79.2  205   4  2   9.8   5.4
  7250  26.2  79.2  150   2  1  10.1   5.6 |  27.0  80.6  205   4  2   9.8   5.4
  7000  27.0  80.6  150   2  1  10.2   5.6 |  27.7  81.9  205   3  2   9.7   5.3
  6750  27.7  81.9  155   2  1  10.4   5.7 |  28.4  83.1  210   3  2   9.5   5.2
  6500  28.5  83.3  160   2  1  10.4   5.7 |  29.1  84.4  210   4  2  10.1   5.6
  6250  29.3  84.7  160   2  1  10.7   5.9 |  29.9  85.8  210   3  2  10.9   6.0
  6000  30.1  86.2  160   2  1   9.5   5.2 |  30.7  87.3  215   3  2  10.2   5.6
  5750  30.9  87.6  160   2  1  14.0   7.7 |  31.5  88.7  215   3  2  10.6   5.8
  5500  32.3  90.1  160   2  1  26.6  14.6 |  32.3  90.1  215   3  2  14.4   7.9
________________________________________________________________________________

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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