Soaring Guidance
Issued by NWS Denver/Boulder, CO

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000
UXUS97 KBOU 071302
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
0702 MDT Tuesday, July 7, 2015

This forecast is for Tuesday, July 7, 2015:

If the trigger temperature of 69.7 F/20.9 C is reached...then
   Thermal Soaring Index....................... Fair
   Maximum rate of lift........................ 344 ft/min (1.7 m/s)
   Maximum height of thermals.................. 12355 ft MSL (7070 ft AGL)

Forecast maximum temperature................... 76.0 F/24.9 C
Time of trigger temperature.................... 1000 MDT
Time of overdevelopment........................ 1330 MDT
Middle/high clouds during soaring window....... Broken/overcast opaque middle
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 9847 ft MSL (4562 ft AGL)
Thermal soaring outlook for Wednesday 07/08.... Good

Wave Soaring Index............................. Poor
Wave Soaring Index trend (to 1800 MDT)......... No change
Height of stable layer (12-18K ft MSL)......... 14654 ft MSL (9369 ft AGL)
Weak PVA/NVA (through 1800 MDT)................ Weak PVA
Potential height of wave....................... 19338 ft MSL (14053 ft AGL)
Wave soaring outlook for Wednesday 07/08....... Poor

Remarks...

Sunrise/Sunset.................... 05:38:28 / 20:30:21 MDT
Total possible sunshine........... 14 hr 51 min 53 sec (891 min 53 sec)
Altitude of sun at 13:04:24 MDT... 72.75 degrees

Upper air data from rawinsonde observation taken on 07/07/2015 at 0600 MDT

Freezing level.................. 14778 ft MSL (9493 ft AGL)
Convective condensation level... 11569 ft MSL (6284 ft AGL)
Lifted condensation level....... 12050 ft MSL (6765 ft AGL)
Lifted index.................... +1.0
K index......................... +26.1

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  -65.8 -86.4   250   35   18   0.5   0.2   83.2 181.8    34.2      M    M
 45000  -59.9 -75.8   230   54   28   1.3   0.7   68.8 155.8    27.7      M    M
 40000  -54.8 -66.6   240   58   30   8.6   4.7   53.9 129.0    19.7      M    M
 38000  -49.7 -57.5   240   51   26   7.6   4.2   52.8 127.0    19.4      M    M
 36000  -44.8 -48.6   235   44   23   8.5   4.7   51.4 124.5    19.0      M    M
 34000  -39.2 -38.6   245   41   21   8.5   4.6   49.9 121.9    18.5      M    M
 32000  -34.9 -30.8   255   21   11   9.2   5.1   47.8 118.1    17.3      M    M
 30000  -29.0 -20.2   260   23   12   9.7   5.3   48.0 118.3    17.9      M    M
 29000  -26.4 -15.5   260   18    9   7.6   4.2   47.6 117.7    17.8      M    M
 28000  -24.1 -11.4   260   14    7   3.3   1.8   46.8 116.3    17.3      M    M
 27000  -22.9  -9.2   255   10    5   5.1   2.8   44.6 112.2    15.7      M    M
 26000  -20.7  -5.3   265   10    5   8.4   4.6   43.7 110.7    15.2      M    M
 25000  -18.2  -0.8   270   10    5   8.4   4.6   43.2 109.8    14.9      M    M
 24000  -16.2   2.8   275   11    6   5.0   2.7   42.2 108.0    14.2      M    M
 23000  -14.5   5.9   255   13    7   7.4   4.0   40.7 105.2    13.1      M    M
 22000  -12.3   9.9   260   15    8   7.6   4.2   39.9 103.7    12.5      M    M
 21000  -10.9  12.4   265   18    9   2.2   1.2   38.1 100.5    11.1      M    M
 20000   -9.4  15.1   255   15    8   7.6   4.1   36.6  97.8     9.8      M    M
 19500   -8.3  17.1   250   16    8   7.6   4.2   36.1  97.1     9.5      M    M
 19000   -7.3  18.9   250   18    9   6.3   3.4   35.7  96.2     9.1      M    M
 18500   -6.4  20.5   245   17    9   6.0   3.3   35.0  95.0     8.5      M    M
 18000   -5.5  22.1   240   15    8   6.1   3.3   34.4  93.9     8.0      M    M
 17500   -4.7  23.5   235   14    7   6.1   3.3   33.7  92.7     7.4      M    M
 17000   -3.8  25.2   225   12    6   5.9   3.2   33.1  91.6     6.9      M    M
 16500   -2.5  27.5   210   11    6   5.8   3.2   32.1  89.8     6.0      M    M
 16000   -1.7  28.9   200   10    5   5.9   3.2   31.5  88.7     5.5      M    M
 15500   -0.8  30.6   210    7    4   5.9   3.2   30.8  87.5     4.9      M    M
 15000   -0.1  31.8   220    5    3   2.9   1.6   30.1  86.1     4.2      M    M
 14500    0.2  32.4   230    7    3   1.6   0.9   28.7  83.7     3.0      M    M
 14000    0.6  33.1   235    8    4   4.8   2.6   27.5  81.5     1.9      M    M
 13500    1.4  34.5   230   10    5   5.9   3.2   26.9  80.4     1.3      M    M
 13000    2.2  36.0   230   12    6   6.0   3.3   26.3  79.3     0.7      M    M
 12500    3.1  37.6   225   14    7   6.0   3.3   25.7  78.2     0.1      M    M
 12000    3.9  39.0   225   16    8   6.0   3.3   25.1  77.2    -0.5    510  2.6
 11500    4.8  40.6   220   15    8   6.1   3.3   24.5  76.1    -1.1    470  2.4
 11000    5.6  42.1   220   15    8   6.0   3.3   23.9  75.1    -1.7    430  2.2
 10500    6.4  43.5   195   13    7   5.1   2.8   23.3  74.0    -2.4    390  2.0
 10250    6.8  44.2   180   12    6   6.2   3.4   23.0  73.3    -2.8    372  1.9
 10000    7.4  45.3   160   12    6   8.2   4.5   22.8  73.1    -2.9    347  1.8
  9750    8.0  46.4   165   12    6   7.7   4.2   22.6  72.8    -3.1    322  1.6
  9500    8.5  47.3   170   12    6   7.8   4.3   22.5  72.5    -3.2    298  1.5
  9250    9.1  48.4   170   13    7   7.8   4.3   22.3  72.2    -3.4    273  1.4
  9000    9.7  49.5   175   13    7   7.7   4.2   22.2  72.0    -3.6    248  1.3
  8750   10.3  50.5   185   14    7   8.3   4.6   22.0  71.7    -3.7    224  1.1
  8500   10.9  51.6   190   16    8   5.9   3.2   21.9  71.4    -3.9    199  1.0
  8250   11.1  52.0   195   17    9   2.5   1.4   21.4  70.5    -4.4    184  0.9
  8000   11.3  52.3   200   19   10   1.8   1.0   20.8  69.5    -4.9    172  0.9
  7750   11.4  52.5   195   20   10   3.9   2.1   20.2  68.4    -5.5    160  0.8
  7500   11.6  52.9   190   20   10  -3.9  -2.1   19.7  67.4    -6.1    148  0.8
  7250   11.0  51.8   185   21   11  -4.1  -2.2   18.3  65.0    -7.4    157  0.8
  7000   11.3  52.3   180   22   11   8.2   4.5   17.9  64.2    -7.9    142  0.7
  6750   12.0  53.6   175   20   10   9.5   5.2   17.8  64.1    -8.0    114  0.6
  6500   12.6  54.7   175   17    9   9.1   5.0   17.8  64.0    -8.1     86  0.4
  6250   13.3  55.9   170   15    8   9.2   5.0   17.7  63.9    -8.1     59  0.3
  6000   14.0  57.2   160   13    7   9.3   5.1   17.7  63.9    -8.2     31  0.2
  5750   14.7  58.5   155   11    6   8.9   4.9   17.7  63.8    -8.3      3  0.0
  5500   15.3  59.5   145    9    5   8.8   4.8   17.6  63.6    -8.4      M    M

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

           07/07/2015 at 0900 MDT          |       07/07/2015 at 1200 MDT
                                           |
K index... +27.1  LI... +0.3               | K index... +26.2  LI... 0.0
CAPE... 0.0  CIN... -1.1                   | CAPE... +3.5  CIN... -21.1
                                           |
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 -61.8 -79.2  250  31 16   2.1   1.1 | -62.5 -80.5  245  32 16   1.6   0.9
 45000 -59.0 -74.2  245  46 24   1.5   0.8 | -60.0 -76.0  245  44 23   1.9   1.0
 40000 -55.7 -68.3  240  59 30   8.5   4.7 | -56.0 -68.8  235  58 30   9.2   5.1
 38000 -50.5 -58.9  235  52 27   8.6   4.7 | -50.4 -58.7  235  54 28   9.5   5.2
 36000 -45.4 -49.7  235  46 23   8.6   4.7 | -44.7 -48.5  230  51 26   9.6   5.2
 34000 -39.5 -39.1  235  40 20   8.7   4.7 | -38.9 -38.0  235  43 22   8.4   4.6
 32000 -34.3 -29.7  230  35 18   8.6   4.7 | -33.9 -29.0  245  36 18   8.3   4.6
 30000 -29.3 -20.7  230  31 16   8.4   4.6 | -29.2 -20.6  240  31 16   7.7   4.2
 29000 -26.8 -16.2  230  30 15   8.4   4.6 | -26.9 -16.4  235  29 15   7.7   4.2
 28000 -24.4 -11.9  230  28 15   7.2   4.0 | -24.6 -12.3  225  27 14   7.5   4.1
 27000 -22.4  -8.3  235  26 14   6.6   3.6 | -22.4  -8.3  225  26 13   7.5   4.1
 26000 -20.5  -4.9  235  25 13   6.6   3.6 | -20.1  -4.2  225  25 13   7.6   4.2
 25000 -18.6  -1.5  240  23 12   6.7   3.7 | -17.9  -0.2  225  24 12   7.7   4.2
 24000 -16.6   2.1  245  21 11   6.4   3.5 | -15.9   3.4  225  22 11   6.8   3.7
 23000 -14.7   5.5  250  19 10   6.5   3.5 | -13.9   7.0  230  21 11   6.8   3.8
 22000 -12.8   9.0  250  17  9   6.5   3.5 | -11.9  10.6  235  20 10   6.9   3.8
 21000 -11.1  12.0  250  16  8   6.1   3.3 | -10.1  13.8  240  17  9   6.2   3.4
 20000  -9.3  15.3  245  16  8   6.1   3.4 |  -8.3  17.1  240  15  8   6.2   3.4
 19500  -8.4  16.9  240  15  8   6.1   3.4 |  -7.4  18.7  245  14  7   6.3   3.4
 19000  -7.5  18.5  240  15  8   6.5   3.5 |  -6.5  20.3  245  12  6   5.4   3.0
 18500  -6.6  20.1  240  15  8   6.6   3.6 |  -5.7  21.7  245  11  6   5.2   2.8
 18000  -5.6  21.9  235  15  8   6.6   3.6 |  -5.0  23.0  240   9  5   5.2   2.8
 17500  -4.3  24.3  235  15  8   6.1   3.3 |  -4.3  24.3  240   8  4   5.5   3.0
 17000  -3.4  25.9  240  15  8   6.1   3.4 |  -3.1  26.4  250   7  3   5.5   3.0
 16500  -2.5  27.5  240  15  8   6.3   3.5 |  -2.3  27.9  255   6  3   5.6   3.1
 16000  -1.6  29.1  235  14  7   6.5   3.5 |  -1.5  29.3  260   7  3   5.7   3.1
 15500  -0.7  30.7  235  14  7   5.0   2.8 |  -0.7  30.7  265   7  3   5.3   2.9
 15000  -0.0  32.0  235  14  7   5.0   2.8 |   0.1  32.2  265   7  3   5.3   2.9
 14500   0.6  33.1  230  14  7   4.4   2.4 |   0.8  33.4  265   7  3   5.2   2.8
 14000   1.2  34.2  225  14  7   4.2   2.3 |   1.5  34.7  255   7  4   5.1   2.8
 13500   1.8  35.2  220  14  7   5.1   2.8 |   2.3  36.1  245   8  4   5.2   2.9
 13000   2.7  36.9  210  14  7   6.7   3.7 |   3.0  37.4  240   8  4   5.4   3.0
 12500   3.6  38.5  205  14  7   6.5   3.6 |   3.8  38.8  230   9  5   5.6   3.1
 12000   4.5  40.1  200  14  7   5.8   3.2 |   4.7  40.5  220   9  5   6.6   3.6
 11500   5.4  41.7  190  14  7   5.9   3.3 |   5.6  42.1  210  10  5   6.5   3.6
 11000   6.3  43.3  190  13  7   6.2   3.4 |   6.5  43.7  205  10  5   6.3   3.5
 10500   7.2  45.0  185  12  6   4.3   2.4 |   7.5  45.5  195  10  5   5.1   2.8
 10250   7.4  45.3  185  12  6   3.3   1.8 |   7.8  46.0  195  10  5   4.3   2.4
 10000   7.8  46.0  185  12  6   8.6   4.7 |   8.2  46.8  190  10  5   7.4   4.0
  9750   8.6  47.5  185  11  6  11.0   6.1 |   8.8  47.8  190   9  5   8.7   4.8
  9500   9.4  48.9  185  10  5   9.0   4.9 |   9.4  48.9  185   9  5   7.7   4.2
  9250   9.9  49.8  190  10  5   6.1   3.3 |   9.9  49.8  185   9  5   5.5   3.0
  9000  10.3  50.5  190  11  6   6.8   3.7 |  10.3  50.5  185   9  5   6.7   3.6
  8750  10.9  51.6  195  11  6   9.1   5.0 |  10.9  51.6  185  10  5   9.1   5.0
  8500  11.5  52.7  195  12  6   5.9   3.2 |  11.5  52.7  185  10  5   6.9   3.8
  8250  11.8  53.2  195  13  7   2.9   1.6 |  11.8  53.2  180  12  6   4.5   2.5
  8000  12.0  53.6  195  14  7   2.8   1.6 |  12.1  53.8  175  13  7   4.4   2.4
  7750  12.1  53.8  195  15  8   1.8   1.0 |  12.4  54.3  170  15  8   4.1   2.2
  7500  12.2  54.0  190  15  8   2.9   1.6 |  12.8  55.0  165  16  8   6.5   3.5
  7250  12.5  54.5  180  15  7   4.0   2.2 |  13.3  55.9  165  16  8   8.6   4.7
  7000  12.7  54.9  170  14  7   3.6   2.0 |  13.9  57.0  160  17  9   8.2   4.5
  6750  13.0  55.4  165  14  7   7.1   3.9 |  14.5  58.1  160  17  9  10.3   5.6
  6500  13.7  56.7  160  14  7  10.3   5.7 |  15.3  59.5  160  17  9  11.2   6.2
  6250  14.4  57.9  160  13  7   9.8   5.4 |  16.2  61.2  160  16  8  12.0   6.6
  6000  15.2  59.4  160  13  7  10.7   5.9 |  17.0  62.6  160  16  8   8.2   4.5
  5750  16.1  61.0  160  12  6  15.2   8.3 |  17.6  63.7  160  16  8  14.4   7.9
  5500  17.4  63.3  155  11  6  20.1  11.0 |  19.5  67.1  160  15  8  36.1  19.8

           07/07/2015 at 1500 MDT          |       07/07/2015 at 1800 MDT
                                           |
K index... +24.5  LI... -1.1               | K index... +25.3  LI... -1.1
CAPE... +82.6  CIN... -1.3                 | CAPE... +61.4  CIN... -42.4
                                           |
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 -63.0 -81.4  245  33 17   1.0   0.5 | -63.0 -81.4  245  30 16   1.5   0.8
 45000 -60.6 -77.1  240  43 22   2.9   1.6 | -60.3 -76.5  230  40 21   2.5   1.4
 40000 -55.3 -67.5  230  52 27   9.0   5.0 | -55.4 -67.7  220  43 22   9.4   5.2
 38000 -49.8 -57.6  230  50 26   9.2   5.1 | -49.6 -57.3  225  42 22   9.7   5.3
 36000 -44.2 -47.6  230  49 25   9.3   5.1 | -43.8 -46.8  230  41 21   9.7   5.3
 34000 -38.1 -36.6  235  42 22   9.1   5.0 | -37.7 -35.9  235  35 18   8.9   4.9
 32000 -32.6 -26.7  245  36 19   9.1   5.0 | -32.4 -26.3  245  28 14   8.9   4.9
 30000 -27.9 -18.2  240  33 17   7.6   4.2 | -27.8 -18.0  245  25 13   7.6   4.1
 29000 -25.7 -14.3  240  32 16   7.6   4.2 | -25.5 -13.9  245  24 12   7.6   4.2
 28000 -23.4 -10.1  240  30 16   7.1   3.9 | -23.3  -9.9  240  23 12   7.0   3.8
 27000 -21.4  -6.5  240  29 15   6.9   3.8 | -21.4  -6.5  240  22 11   6.5   3.6
 26000 -19.4  -2.9  240  27 14   6.9   3.8 | -19.5  -3.1  240  21 11   6.5   3.6
 25000 -17.4   0.7  240  26 13   7.1   3.9 | -17.6   0.3  235  21 11   6.5   3.6
 24000 -15.5   4.1  240  24 12   6.4   3.5 | -15.6   3.9  235  19 10   6.5   3.6
 23000 -13.6   7.5  240  21 11   6.4   3.5 | -13.7   7.3  235  17  9   6.5   3.6
 22000 -11.7  10.9  240  18  9   6.5   3.6 | -11.8  10.8  230  15  7   6.7   3.7
 21000 -10.0  14.0  240  16  8   6.0   3.3 | -10.1  13.8  230  13  7   5.5   3.0
 20000  -8.2  17.2  240  14  7   6.0   3.3 |  -8.5  16.7  230  11  6   5.5   3.0
 19500  -7.4  18.7  240  13  7   6.0   3.3 |  -7.7  18.1  230  10  5   5.5   3.0
 19000  -6.5  20.3  240  12  6   5.4   2.9 |  -6.9  19.6  230  10  5   5.3   2.9
 18500  -5.8  21.6  245  11  5   5.0   2.8 |  -6.2  20.8  230   9  5   5.1   2.8
 18000  -5.1  22.8  250   9  5   5.0   2.7 |  -5.4  22.3  230   9  4   5.0   2.8
 17500  -3.9  25.0  255   8  4   5.4   3.0 |  -4.2  24.4  235   8  4   5.8   3.2
 17000  -3.1  26.4  255   7  4   5.4   3.0 |  -3.3  26.1  235   7  3   5.9   3.2
 16500  -2.3  27.9  260   7  4   5.5   3.0 |  -2.5  27.5  235   6  3   5.4   3.0
 16000  -1.5  29.3  265   7  4   5.5   3.0 |  -1.7  28.9  235   5  3   5.4   3.0
 15500  -0.7  30.7  270   7  3   5.7   3.1 |  -0.9  30.4  235   4  2   5.8   3.2
 15000   0.2  32.4  270   7  3   5.8   3.2 |  -0.0  32.0  240   4  2   5.9   3.2
 14500   1.0  33.8  275   7  3   6.1   3.3 |   0.8  33.4  245   3  2   6.4   3.5
 14000   1.9  35.4  275   7  3   6.5   3.5 |   1.9  35.4  255   3  2   7.2   3.9
 13500   2.9  37.2  270   7  4   6.5   3.6 |   2.9  37.2  265   3  1   7.3   4.0
 13000   3.8  38.8  265   7  3   6.6   3.6 |   4.0  39.2  265   3  1   7.7   4.2
 12500   4.8  40.6  260   7  3   6.6   3.6 |   5.1  41.2  260   3  2   7.7   4.2
 12000   5.7  42.3  255   6  3   6.5   3.6 |   6.2  43.2  255   3  1   7.1   3.9
 11500   6.6  43.9  245   6  3   6.5   3.6 |   7.2  45.0  245   3  1   7.2   3.9
 11000   7.4  45.3  230   6  3   4.9   2.7 |   8.1  46.6  235   2  1   6.3   3.5
 10500   8.1  46.6  210   6  3   3.8   2.1 |   9.1  48.4  230   2  1   5.6   3.1
 10250   8.3  46.9  200   6  3   4.1   2.2 |   9.4  48.9  225   2  1   5.0   2.7
 10000   8.7  47.7  190   8  4   7.5   4.1 |   9.8  49.6  230   3  2   7.7   4.2
  9750   9.3  48.7  185   9  5   8.3   4.5 |  10.5  50.9  230   4  2   9.1   5.0
  9500   9.9  49.8  175  11  6   8.0   4.4 |  11.1  52.0  235   4  2   8.8   4.8
  9250  10.4  50.7  170  13  7   7.0   3.8 |  11.6  52.9  235   5  3   6.7   3.7
  9000  10.8  51.4  170  14  7   7.6   4.2 |  12.0  53.6  220   6  3   5.5   3.0
  8750  11.4  52.5  165  15  8   8.6   4.7 |  12.4  54.3  210   7  4   6.5   3.6
  8500  12.0  53.6  165  17  9   8.7   4.8 |  12.8  55.0  200   8  4   6.1   3.3
  8250  12.6  54.7  165  18  9   9.6   5.3 |  13.2  55.8  190  10  5   4.6   2.5
  8000  13.3  55.9  165  18  9   9.7   5.3 |  13.5  56.3  180  12  6   4.8   2.6
  7750  14.0  57.2  165  18  9   9.1   5.0 |  13.9  57.0  175  14  7   5.7   3.1
  7500  14.7  58.5  165  18  9   9.7   5.3 |  14.3  57.7  170  16  8   7.2   4.0
  7250  15.5  59.9  165  18  9  10.4   5.7 |  14.9  58.8  170  16  8   9.5   5.2
  7000  16.3  61.3  165  18  9  10.3   5.7 |  15.6  60.1  170  16  8   9.7   5.3
  6750  17.0  62.6  165  18  9  10.5   5.8 |  16.4  61.5  170  16  8   9.7   5.3
  6500  17.8  64.0  165  18  9  11.1   6.1 |  17.1  62.8  165  16  8  10.4   5.7
  6250  18.7  65.7  165  18  9  11.9   6.5 |  17.9  64.2  165  15  8  11.3   6.2
  6000  19.5  67.1  165  17  9  10.1   5.6 |  18.7  65.7  165  15  8  10.3   5.6
  5750  20.3  68.5  160  17  9  14.5   8.0 |  19.5  67.1  165  15  8  12.7   6.9
  5500  21.9  71.4  160  16  8  28.4  15.6 |  20.7  69.3  165  14  7  21.0  11.5
________________________________________________________________________________

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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