Soaring Guidance
Issued by NWS Denver/Boulder, CO

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956
UXUS97 KBOU 040118
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
1917 MDT Thursday, July 3, 2025

This forecast is for Friday, July 4, 2025:

If the trigger temperature of 75.9 F/24.4 C is reached...then
   Thermal Soaring Index....................... Excellent
   Maximum rate of lift........................ 892 ft/min (4.5 m/s)
   Maximum height of thermals.................. 16178 ft MSL (10869 ft AGL)

Forecast maximum temperature................... 89.0 F/32.1 C
Time of trigger temperature.................... 0945 MDT
Time of overdevelopment........................ None
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................. 13396 ft MSL (8087 ft AGL)
Thermal soaring outlook for Saturday 07/05..... 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)................ Weak PVA
Potential height of wave....................... 19598 ft MSL (14289 ft AGL)
Wave soaring outlook for Saturday 07/05........ Poor

Remarks...

Sunrise/Sunset.................... 05:37:05 / 20:30:58 MDT
Total possible sunshine........... 14 hr 53 min 53 sec (893 min 53 sec)
Altitude of sun at 13:04:02 MDT... 73.01 degrees

Upper air data from numerical model forecast valid on 07/04/2025 at 0600 MDT

Freezing level.................. 15593 ft MSL (10284 ft AGL)
Convective condensation level... 12843 ft MSL (7534 ft AGL)
Lifted condensation level....... 14442 ft MSL (9132 ft AGL)
Lifted index.................... -3.7
K index......................... +29.2

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  -62.5 -80.5   225   25   13   3.1   1.7      M     M       M      M    M
 45000  -56.6 -69.9   225   34   18   5.6   3.1      M     M       M      M    M
 40000  -48.1 -54.6   225   42   22   5.3   2.9      M     M       M      M    M
 38000  -44.9 -48.8   220   42   22   5.3   2.9      M     M       M      M    M
 36000  -41.8 -43.2   220   43   22   5.2   2.9      M     M       M      M    M
 34000  -37.5 -35.5   215   35   18   6.5   3.6      M     M       M      M    M
 32000  -33.5 -28.3   205   28   14   6.2   3.4      M     M       M      M    M
 30000  -29.0 -20.2   195   27   14   7.8   4.3   47.2 117.0    11.8      M    M
 29000  -26.7 -16.1   190   27   14   7.8   4.3   46.5 115.7    11.3      M    M
 28000  -24.3 -11.7   185   27   14   7.5   4.1   45.9 114.6    11.0      M    M
 27000  -22.2  -8.0   190   26   13   7.4   4.1   44.8 112.7    10.2      M    M
 26000  -20.0  -4.0   190   25   13   7.5   4.1   44.0 111.1     9.6      M    M
 25000  -17.8  -0.0   195   23   12   7.5   4.1   43.2 109.8     9.0      M    M
 24000  -15.7   3.7   200   23   12   6.9   3.8   42.1 107.9     8.2      M    M
 23000  -13.7   7.3   205   22   11   6.9   3.8   41.1 106.0     7.4      M    M
 22000  -11.7  10.9   210   22   11   7.0   3.8   40.2 104.3     6.6      M    M
 21000   -9.9  14.2   215   21   11   5.8   3.2   38.8 101.8     5.5      M    M
 20000   -8.2  17.2   215   20   10   5.9   3.2   37.4  99.3     4.3      M    M
 19500   -7.4  18.7   215   20   10   5.9   3.2   36.7  98.1     3.7      M    M
 19000   -6.6  20.1   215   19   10   6.4   3.3   36.1  97.0     3.2      M    M
 18500   -5.7  21.7   220   19   10   6.0   3.3   35.4  95.8     2.6      M    M
 18000   -4.8  23.4   220   19   10   6.0   3.3   34.8  94.7     2.0      M    M
 17500   -3.4  25.9   220   17    9   6.7   3.7   34.0  93.2     1.2      M    M
 17000   -2.4  27.7   220   16    8   6.7   3.7   33.5  92.3     0.8      M    M
 16500   -1.5  29.3   220   15    8   6.3   3.5   32.9  91.3     0.2      M    M
 16000   -0.6  30.9   220   14    7   6.4   3.5   32.4  90.2    -0.3    868  4.4
 15500    0.3  32.5   225   14    7   6.2   3.4   31.8  89.2    -0.8    826  4.2
 15000    1.2  34.2   230   13    7   6.2   3.4   31.2  88.1    -1.4    785  4.0
 14500    2.1  35.8   240   12    6   6.6   3.6   30.6  87.1    -2.0    744  3.8
 14000    3.1  37.6   245   12    6   6.9   3.8   30.1  86.2    -2.5    699  3.6
 13500    4.1  39.4   255   12    6   6.9   3.8   29.7  85.4    -3.0    654  3.3
 13000    5.1  41.2   265   11    6   6.9   3.8   29.2  84.6    -3.4    610  3.1
 12500    6.1  43.0   275   10    5   7.0   3.8   28.8  83.8    -3.9    565  2.9
 12000    7.2  45.0   285   10    5   7.7   4.2   28.4  83.1    -4.3    518  2.6
 11500    8.3  46.9   295    9    5   7.7   4.2   28.1  82.5    -4.7    469  2.4
 11000    9.3  48.7   300    9    5   6.5   3.6   27.6  81.7    -5.1    424  2.2
 10500   10.3  50.5   305    9    4   5.5   3.0   27.2  80.9    -5.6    380  1.9
 10250   10.6  51.1   305    9    4   4.5   2.4   26.7  80.1    -6.0    362  1.8
 10000   11.0  51.8   310    9    4   6.9   3.8   26.4  79.5    -6.4    343  1.7
  9750   11.6  52.9   310    8    4   7.9   4.3   26.2  79.2    -6.6    319  1.6
  9500   12.1  53.8   315    8    4   7.6   4.2   26.1  79.0    -6.8    296  1.5
  9250   12.6  54.7   320    8    4   4.8   2.6   25.9  78.5    -7.1    274  1.4
  9000   12.8  55.0   325    8    4   5.1   2.8   25.4  77.7    -7.6    259  1.3
  8750   13.3  55.9   335    7    4   7.6   4.2   25.2  77.3    -7.8    237  1.2
  8500   13.8  56.8   340    7    4   6.5   3.6   25.0  77.0    -8.1    215  1.1
  8250   14.2  57.6   350    7    3   4.6   2.5   24.7  76.4    -8.4    195  1.0
  8000   14.5  58.1   350    6    3   4.2   2.3   24.2  75.6    -8.9    179  0.9
  7750   14.9  58.8   350    6    3   5.7   3.1   23.9  75.0    -9.3    161  0.8
  7500   15.3  59.5   355    5    3   5.2   2.9   23.6  74.4    -9.6    141  0.7
  7250   15.6  60.1   345    5    3   4.2   2.3   23.2  73.7   -10.0    124  0.6
  7000   15.9  60.6   340    5    2   4.4   2.4   22.7  72.9   -10.5    107  0.5
  6750   16.3  61.3   330    5    2   6.5   3.6   22.4  72.3   -10.8     88  0.4
  6500   16.9  62.4   335    4    2   7.8   4.3   22.2  72.0   -11.0     64  0.3
  6250   17.4  63.3   335    4    2   7.4   4.1   22.1  71.7   -11.2     40  0.2
  6000   18.0  64.4   340    4    2   7.6   4.2   21.9  71.4   -11.4     16  0.1
  5750   18.6  65.5   345    4    2   8.0   4.4   21.7  71.1   -11.6      M    M
  5500   19.1  66.4   340    3    2   7.7   4.2   21.6  70.9   -11.8      M    M

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

           07/04/2025 at 0900 MDT          |       07/04/2025 at 1200 MDT
                                           |
CAPE...  +205.5    LI...       -1.2        | CAPE...  +281.4    LI...       -2.0
CINH...   -55.5    K Index... +27.8        | CINH...    -7.4    K Index... +28.0
                                           |
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 -62.3 -80.1  220  21 11   3.3   1.8 | -62.6 -80.7  225  23 12   3.2   1.7
 45000 -56.3 -69.3  225  29 15   5.4   3.0 | -56.4 -69.5  230  32 17   5.8   3.2
 40000 -48.0 -54.4  225  40 21   6.1   3.3 | -47.7 -53.9  230  40 21   5.7   3.1
 38000 -44.4 -47.9  225  41 21   6.1   3.3 | -44.3 -47.7  235  41 21   5.7   3.1
 36000 -40.7 -41.3  230  43 22   6.1   3.3 | -40.9 -41.6  240  43 22   5.7   3.1
 34000 -36.5 -33.7  230  39 20   6.3   3.4 | -36.6 -33.9  235  41 21   6.4   3.5
 32000 -32.7 -26.9  225  35 18   6.2   3.4 | -32.8 -27.0  235  39 20   6.3   3.5
 30000 -28.7 -19.7  220  31 16   6.8   3.7 | -28.6 -19.5  240  35 18   7.0   3.9
 29000 -26.7 -16.1  220  29 15   6.8   3.7 | -26.5 -15.7  245  33 17   7.1   3.9
 28000 -24.6 -12.3  215  27 14   6.5   3.6 | -24.4 -11.9  245  31 16   6.7   3.7
 27000 -22.8  -9.0  210  26 13   6.2   3.4 | -22.5  -8.5  245  29 15   6.5   3.6
 26000 -20.9  -5.6  210  25 13   6.2   3.4 | -20.5  -4.9  250  26 13   6.6   3.6
 25000 -19.0  -2.2  205  25 13   6.3   3.4 | -18.6  -1.5  250  24 12   6.7   3.7
 24000 -17.2   1.0  205  24 12   6.4   3.5 | -16.9   1.6  250  23 12   5.5   3.0
 23000 -15.3   4.5  210  24 12   6.4   3.5 | -15.3   4.5  250  22 11   5.6   3.0
 22000 -13.4   7.9  210  23 12   6.5   3.6 | -13.6   7.5  250  22 11   5.6   3.1
 21000 -11.3  11.7  220  22 11   7.4   4.1 | -11.7  10.9  255  21 11   6.8   3.8
 20000  -9.2  15.4  230  21 11   7.4   4.1 |  -9.7  14.5  255  21 11   6.9   3.8
 19500  -8.1  17.4  235  21 11   7.5   4.1 |  -8.7  16.3  260  20 10   6.9   3.8
 19000  -7.0  19.4  240  20 10   7.1   3.9 |  -7.7  18.1  260  20 10   6.6   3.6
 18500  -6.0  21.2  245  19 10   7.0   3.8 |  -6.8  19.8  265  20 10   6.6   3.6
 18000  -5.1  22.8  250  18 10   7.0   3.8 |  -5.4  22.3  265  19 10   6.1   3.4
 17500  -3.8  25.2  255  17  9   5.7   3.1 |  -4.6  23.7  270  19 10   6.0   3.3
 17000  -3.0  26.6  260  16  8   5.7   3.1 |  -3.7  25.3  270  19 10   6.3   3.4
 16500  -2.2  28.0  265  15  8   5.7   3.1 |  -2.7  27.1  275  19 10   7.1   3.9
 16000  -1.4  29.5  270  15  8   5.7   3.1 |  -1.7  28.9  280  19 10   7.1   3.9
 15500  -0.5  31.1  275  14  7   6.2   3.4 |  -0.7  30.7  285  18  9   7.2   4.0
 15000   0.4  32.7  280  14  7   6.3   3.4 |   0.4  32.7  290  18  9   7.2   4.0
 14500   1.3  34.3  285  14  7   6.7   3.7 |   1.4  34.5  295  17  9   7.5   4.1
 14000   2.3  36.1  290  14  7   7.1   3.9 |   2.5  36.5  295  16  8   7.6   4.2
 13500   3.3  37.9  295  14  7   7.2   4.0 |   3.6  38.5  300  16  8   7.8   4.3
 13000   4.4  39.9  295  14  7   7.5   4.1 |   4.8  40.6  305  15  8   8.0   4.4
 12500   5.5  41.9  300  14  7   7.5   4.1 |   5.9  42.6  310  14  7   8.1   4.4
 12000   6.6  43.9  300  14  7   7.4   4.1 |   7.1  44.8  310  13  7   8.5   4.6
 11500   7.7  45.9  300  15  7   7.4   4.1 |   8.4  47.1  315  12  6   8.5   4.7
 11000   8.8  47.8  300  14  7   7.4   4.1 |   9.7  49.5  315  12  6   8.7   4.8
 10500   9.9  49.8  300  14  7   4.8   2.6 |  11.0  51.8  315  11  6   4.3   2.4
 10250  10.1  50.2  300  14  7   3.8   2.1 |  11.2  52.2  315  11  6   5.4   2.9
 10000  10.6  51.1  295  13  7   8.3   4.6 |  11.9  53.4  315  10  5  11.9   6.5
  9750  11.2  52.2  295  13  7   9.0   5.0 |  12.7  54.9  310   9  5  10.6   5.8
  9500  11.9  53.4  295  12  6   8.3   4.5 |  13.4  56.1  310   8  4   9.4   5.2
  9250  12.4  54.3  295  12  6   5.5   3.0 |  14.0  57.2  310   7  4   6.6   3.6
  9000  12.7  54.9  295  11  6   6.2   3.4 |  14.5  58.1  310   6  3   9.1   5.0
  8750  13.3  55.9  290  10  5   8.3   4.6 |  15.3  59.5  310   6  3  11.7   6.4
  8500  13.8  56.8  290   9  5   7.2   3.9 |  16.1  61.0  315   5  3   9.9   5.4
  8250  14.3  57.7  290   9  4   5.7   3.1 |  16.7  62.1  315   5  2   7.2   4.0
  8000  14.7  58.5  290   8  4   6.1   3.3 |  17.3  63.1  320   4  2   9.0   4.9
  7750  15.2  59.4  295   7  4   8.1   4.4 |  18.1  64.6  320   4  2  12.6   6.9
  7500  15.7  60.3  300   6  3   6.7   3.7 |  19.0  66.2  325   3  2  10.1   5.6
  7250  16.1  61.0  305   5  3   4.8   2.6 |  19.6  67.3  330   3  2   7.4   4.1
  7000  16.4  61.5  310   4  2   5.7   3.1 |  20.2  68.4  335   3  1   9.1   5.0
  6750  17.0  62.6  320   3  2   9.9   5.4 |  21.0  69.8  335   3  1  12.9   7.1
  6500  17.7  63.9  335   2  1  10.2   5.6 |  22.0  71.6  340   2  1  11.8   6.5
  6250  18.4  65.1  350   2  1   8.3   4.6 |  22.7  72.9  350   2  1   9.9   5.4
  6000  19.0  66.2  010   2  1   8.2   4.5 |  23.5  74.3  355   2  1   9.2   5.0
  5750  19.7  67.5  025   2  1  13.0   7.1 |  24.3  75.7  360   2  1  15.5   8.5
  5500  21.0  69.8  025   2  1  23.4  12.8 |  26.0  78.8  005   2  1  31.5  17.3

           07/04/2025 at 1500 MDT          |       07/04/2025 at 1800 MDT
                                           |
CAPE...  +204.1    LI...       -1.7        | CAPE...  +302.8    LI...       -1.7
CINH...   -15.4    K Index... +27.6        | CINH...   -33.2    K Index... +31.8
                                           |
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 -62.6 -80.7  225  26 13   2.8   1.6 | -62.9 -81.2  215  23 12   2.7   1.5
 45000 -56.8 -70.2  230  37 19   5.9   3.2 | -57.0 -70.6  230  35 18   6.4   3.5
 40000 -47.5 -53.5  230  44 23   5.9   3.3 | -47.1 -52.8  230  46 24   5.8   3.2
 38000 -44.0 -47.2  235  44 23   5.9   3.3 | -43.7 -46.7  235  47 24   5.8   3.2
 36000 -40.4 -40.7  235  44 23   5.9   3.2 | -40.2 -40.4  240  48 25   5.8   3.2
 34000 -37.0 -34.6  235  40 20   5.7   3.1 | -37.0 -34.6  235  43 22   5.2   2.9
 32000 -33.6 -28.5  235  35 18   5.5   3.0 | -33.9 -29.0  230  38 20   5.0   2.8
 30000 -29.3 -20.7  235  32 17   7.6   4.1 | -29.7 -21.5  235  37 19   7.3   4.0
 29000 -27.0 -16.6  235  31 16   7.6   4.1 | -27.5 -17.5  235  37 19   7.3   4.0
 28000 -24.8 -12.6  240  30 16   7.3   4.0 | -24.8 -12.6  240  36 19   6.8   3.7
 27000 -22.2  -8.0  240  28 14   7.0   3.8 | -22.8  -9.0  245  34 18   6.8   3.7
 26000 -20.1  -4.2  245  26 14   7.0   3.9 | -20.8  -5.4  250  32 17   6.8   3.8
 25000 -18.0  -0.4  250  25 13   6.8   3.7 | -18.7  -1.7  260  31 16   6.8   3.7
 24000 -16.1   3.0  255  24 13   6.3   3.5 | -16.7   1.9  265  29 15   6.9   3.8
 23000 -14.3   6.3  260  24 13   6.3   3.5 | -14.7   5.5  270  27 14   6.9   3.8
 22000 -12.4   9.7  265  24 13   6.4   3.5 | -12.7   9.1  275  26 13   7.0   3.8
 21000 -10.6  12.9  265  24 12   6.4   3.5 | -10.7  12.7  280  26 13   7.0   3.9
 20000  -8.7  16.3  265  23 12   6.5   3.5 |  -8.6  16.5  280  26 14   7.1   3.9
 19500  -7.8  18.0  265  23 12   6.4   3.5 |  -7.6  18.3  280  27 14   7.2   4.0
 19000  -6.8  19.8  265  22 11   7.5   4.1 |  -6.7  19.9  280  26 14   6.5   3.6
 18500  -5.8  21.6  270  22 11   7.4   4.1 |  -5.7  21.7  285  26 13   6.6   3.6
 18000  -4.7  23.5  275  21 11   7.2   4.0 |  -4.8  23.4  285  26 13   6.7   3.7
 17500  -3.7  25.3  275  21 11   7.0   3.8 |  -3.9  25.0  285  25 13   6.7   3.7
 17000  -2.7  27.1  280  22 11   7.0   3.8 |  -2.9  26.8  290  24 13   6.6   3.6
 16500  -1.7  28.9  285  22 11   6.5   3.6 |  -1.9  28.6  290  24 12   7.7   4.2
 16000  -0.7  30.7  285  22 11   6.6   3.6 |  -0.9  30.4  295  23 12   7.6   4.2
 15500   0.2  32.4  290  22 11   7.0   3.8 |   0.2  32.4  295  23 12   8.0   4.4
 15000   1.3  34.3  295  21 11   7.2   4.0 |   1.4  34.5  295  22 11   8.3   4.5
 14500   2.3  36.1  295  21 11   7.4   4.0 |   3.2  37.8  300  20 10   8.7   4.8
 14000   4.0  39.2  300  18  9   7.9   4.3 |   4.5  40.1  300  19 10   8.8   4.8
 13500   5.1  41.2  300  17  9   8.2   4.5 |   5.8  42.4  300  18  9   9.2   5.0
 13000   6.3  43.3  300  15  8   8.4   4.6 |   7.2  45.0  300  16  8   9.4   5.2
 12500   7.5  45.5  300  14  7   8.5   4.6 |   8.6  47.5  300  15  8   9.3   5.1
 12000   8.7  47.7  300  11  6   8.6   4.7 |  10.0  50.0  300  13  7   9.1   5.0
 11500   9.9  49.8  305   8  4   8.8   4.8 |  11.3  52.3  295  11  6   8.9   4.9
 11000  11.3  52.3  300   7  3   9.1   5.0 |  12.6  54.7  295  10  5   8.5   4.7
 10500  12.7  54.9  300   5  3   5.2   2.9 |  13.9  57.0  285   9  4   5.5   3.0
 10250  12.9  55.2  300   5  3   6.6   3.6 |  14.2  57.6  285   8  4   6.7   3.7
 10000  13.8  56.8  300   5  2  12.8   7.0 |  15.0  59.0  285   8  4  11.6   6.4
  9750  14.6  58.3  300   4  2  11.7   6.4 |  15.7  60.3  280   7  4  10.8   5.9
  9500  15.5  59.9  300   4  2   9.7   5.3 |  16.5  61.7  275   7  4   9.1   5.0
  9250  16.1  61.0  300   4  2   7.5   4.1 |  17.1  62.8  270   7  3   7.2   3.9
  9000  16.7  62.1  300   4  2  10.4   5.7 |  17.7  63.9  270   7  3   9.5   5.2
  8750  17.6  63.7  300   3  2  12.1   6.6 |  18.5  65.3  260   6  3  10.8   5.9
  8500  18.4  65.1  300   3  2  10.3   5.6 |  19.2  66.6  255   6  3   9.3   5.1
  8250  19.1  66.4  305   3  1   7.6   4.2 |  19.8  67.6  250   6  3   7.2   3.9
  8000  19.7  67.5  305   3  1   9.4   5.1 |  20.3  68.5  245   6  3   8.0   4.4
  7750  20.5  68.9  305   2  1  12.0   6.6 |  21.0  69.8  230   6  3   9.3   5.1
  7500  21.4  70.5  305   2  1   9.7   5.3 |  21.6  70.9  220   6  3   8.5   4.7
  7250  22.0  71.6  305   2  1   7.6   4.2 |  22.2  72.0  215   6  3   7.9   4.3
  7000  22.6  72.7  305   2  1   9.3   5.1 |  22.8  73.0  210   7  3   8.4   4.6
  6750  23.4  74.1  305   2  1  12.0   6.6 |  23.5  74.3  205   7  4   9.4   5.2
  6500  24.3  75.7  305   2  1  10.8   5.9 |  24.2  75.6  200   7  4   9.4   5.2
  6250  25.0  77.0  305   1  1   9.2   5.1 |  24.9  76.8  200   7  4   9.1   5.0
  6000  25.7  78.3  310   1  1   9.1   5.0 |  25.5  77.9  195   7  4   8.9   4.9
  5750  26.4  79.5  310   1  1  13.4   7.3 |  26.2  79.2  195   7  4  11.9   6.6
  5500  27.8  82.0  310   1  1  23.4  12.9 |  27.3  81.1  195   6  3  18.4  10.1
________________________________________________________________________________

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.

CINH (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