Soaring Guidance
Issued by NWS Denver/Boulder, CO

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000
UXUS97 KBOU 010104
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
1904 MDT Tuesday, June 30, 2015

This forecast is for Wednesday, July 1, 2015:

If the trigger temperature of 82.1 F/27.8 C is reached...then
   Thermal Soaring Index....................... Good
   Maximum rate of lift........................ 552 ft/min (2.8 m/s)
   Maximum height of thermals.................. 13228 ft MSL (7921 ft AGL)

Forecast maximum temperature................... 88.0 F/31.6 C
Time of trigger temperature.................... 1200 MDT
Time of overdevelopment........................ 1600 MDT
Middle/high clouds during soaring window....... Overcast thin high
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 9440 ft MSL (4133 ft AGL)
Thermal soaring outlook for Thursday 07/02..... Poor

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 NVA
Potential height of wave....................... 17355 ft MSL (12048 ft AGL)
Wave soaring outlook for Thursday 07/02........ Poor

Remarks... Scattered afternoon storms

Sunrise/Sunset.................... 05:35:12 / 20:31:26 MDT
Total possible sunshine........... 14 hr 56 min 14 sec (896 min 14 sec)
Altitude of sun at 13:03:22 MDT... 73.29 degrees

Upper air data from numerical model forecast valid on 07/01/2015 at 0600 MDT

Freezing level.................. 16609 ft MSL (11302 ft AGL)
Convective condensation level... 14441 ft MSL (9134 ft AGL)
Lifted condensation level....... 14136 ft MSL (8829 ft AGL)
Lifted index.................... -1.6
K index......................... +23.1

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  -67.1 -88.8   315   25   13   0.5   0.3      M     M       M      M    M
 45000  -63.1 -81.6   320   30   16   6.4   3.5      M     M       M      M    M
 40000  -52.8 -63.0   320   32   16   8.9   4.9      M     M       M      M    M
 38000  -47.5 -53.5   315   31   16   8.9   4.9      M     M       M      M    M
 36000  -42.2 -44.0   310   31   16   8.8   4.8      M     M       M      M    M
 34000  -37.0 -34.6   310   29   15   8.7   4.8      M     M       M      M    M
 32000  -31.8 -25.2   305   28   14   9.5   5.2      M     M       M      M    M
 30000  -26.5 -15.7   310   24   13   7.7   4.2   49.4 121.0    13.9      M    M
 29000  -24.2 -11.6   315   23   12   7.7   4.2   48.7 119.7    13.5      M    M
 28000  -22.0  -7.6   320   22   11   7.4   4.1   47.9 118.3    13.1      M    M
 27000  -19.7  -3.5   320   21   11   7.5   4.1   47.0 116.6    12.5      M    M
 26000  -17.5   0.5   325   21   11   7.5   4.1   46.1 115.1    11.9      M    M
 25000  -15.3   4.5   325   20   10   7.0   3.8   45.4 113.7    11.4      M    M
 24000  -13.3   8.1   325   19   10   6.7   3.7   44.2 111.5    10.5      M    M
 23000  -11.4  11.5   325   18    9   6.8   3.7   43.1 109.6     9.7      M    M
 22000   -9.4  15.1   325   17    9   5.9   3.2   42.1 107.8     8.9      M    M
 21000   -7.9  17.8   320   18    9   5.3   2.9   40.4 104.8     7.5      M    M
 20000   -6.4  20.5   320   18    9   5.4   3.0   38.9 102.0     6.2      M    M
 19500   -5.6  21.9   320   18    9   5.4   3.0   38.2 100.7     5.6      M    M
 19000   -4.8  23.4   320   18   10   5.9   3.3   37.5  99.5     5.0      M    M
 18500   -3.9  25.0   325   19   10   5.9   3.3   36.8  98.3     4.4      M    M
 18000   -3.1  26.4   325   19   10   6.4   3.5   36.2  97.1     3.8      M    M
 17500   -2.1  28.2   325   20   10   6.7   3.7   35.7  96.2     3.4      M    M
 17000   -1.1  30.0   330   20   11   6.7   3.7   35.2  95.3     2.9      M    M
 16500   -0.0  32.0   330   21   11   7.6   4.1   34.7  94.5     2.5      M    M
 16000    1.6  34.9   335   21   11   7.4   4.1   34.2  93.5     2.0      M    M
 15500    2.7  36.9   335   21   11   7.1   3.9   33.7  92.7     1.6      M    M
 15000    3.7  38.7   340   20   10   7.1   3.9   33.3  91.9     1.2      M    M
 14500    4.8  40.6   340   19   10   7.8   4.3   32.9  91.3     0.8      M    M
 14000    5.9  42.6   345   18    9   7.8   4.3   32.6  90.7     0.5      M    M
 13500    7.0  44.6   345   18    9   7.6   4.2   32.3  90.1     0.2      M    M
 13000    8.1  46.6   350   17    9   7.6   4.2   31.9  89.4    -0.2    623  3.2
 12500    9.1  48.4   350   16    8   7.7   4.2   31.6  88.8    -0.6    577  2.9
 12000   10.2  50.4   355   16    8   7.7   4.2   31.2  88.2    -1.0    529  2.7
 11500   11.3  52.3   355   16    8   7.8   4.3   30.9  87.7    -1.4    481  2.4
 11000   12.5  54.5   360   16    8   7.6   4.1   30.6  87.1    -1.7    432  2.2
 10500   13.6  56.5   360   16    8   4.2   2.3   30.3  86.6    -2.0    383  1.9
 10250   13.8  56.8   360   16    8   4.6   2.5   29.7  85.5    -2.6    372  1.9
 10000   14.4  57.9   360   16    8   9.4   5.2   29.6  85.3    -2.7    346  1.8
  9750   15.0  59.0   360   16    8   8.5   4.7   29.5  85.1    -2.8    320  1.6
  9500   15.6  60.1   005   16    8   7.4   4.1   29.4  85.0    -2.9    294  1.5
  9250   16.1  61.0   005   15    8   5.7   3.1   29.2  84.5    -3.2    274  1.4
  9000   16.5  61.7   005   15    8   6.9   3.8   28.9  84.0    -3.5    253  1.3
  8750   17.0  62.6   005   14    7   7.7   4.2   28.7  83.7    -3.7    230  1.2
  8500   17.6  63.7   010   14    7   6.7   3.7   28.5  83.3    -3.9    206  1.0
  8250   18.0  64.4   010   13    7   5.7   3.1   28.2  82.8    -4.3    186  0.9
  8000   18.4  65.1   010   13    7   6.1   3.3   27.9  82.3    -4.6    166  0.8
  7750   18.8  65.8   010   12    6   6.3   3.5   27.7  81.8    -4.9    147  0.7
  7500   19.2  66.6   005   11    6   5.8   3.2   27.4  81.3    -5.2    127  0.6
  7250   19.6  67.3   005   10    5   5.4   3.0   27.1  80.7    -5.6    109  0.6
  7000   19.9  67.8   360    9    5   5.6   3.1   26.7  80.1    -6.0     91  0.5
  6750   20.3  68.5   350    8    4   4.3   2.4   26.4  79.5    -6.4     74  0.4
  6500   20.5  68.9   345    7    3   3.1   1.7   25.9  78.7    -7.8     60  0.3
  6250   20.6  69.1   330    5    3   1.0   0.6   25.4  77.7    -7.6     49  0.2
  6000   20.7  69.3   310    5    2   7.6   4.2   24.8  76.7    -8.2     38  0.2
  5750   21.4  70.5   290    5    2   1.2   0.7   24.7  76.5    -8.3     10  0.1
  5500   20.1  68.2   265    3    2 -28.4 -15.6   23.0  73.4   -10.3     43  0.2

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

           07/01/2015 at 0900 MDT          |       07/01/2015 at 1200 MDT
                                           |
K index... +22.0  LI... -2.3               | K index... +25.3  LI... -2.3
CAPE... +485.9  CIN... -74.7               | CAPE... +591.3  CIN... -25.6
                                           |
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 -66.9 -88.4  305  22 11  -0.1  -0.0 | -66.7 -88.1  305  25 13  -0.8  -0.5
 45000 -63.7 -82.7  305  31 16   6.8   3.7 | -63.5 -82.3  305  36 18   7.2   3.9
 40000 -52.5 -62.5  310  35 18   8.2   4.5 | -52.3 -62.1  310  39 20   8.6   4.7
 38000 -47.6 -53.7  310  32 16   8.2   4.5 | -47.1 -52.8  305  36 18   8.6   4.7
 36000 -42.7 -44.9  305  29 15   8.8   4.9 | -41.9 -43.4  300  33 17   8.6   4.7
 34000 -37.2 -35.0  310  28 15   9.2   5.0 | -36.8 -34.2  305  30 15   8.6   4.7
 32000 -31.6 -24.9  315  28 14   9.9   5.4 | -31.7 -25.1  310  27 14   9.0   4.9
 30000 -26.5 -15.7  320  27 14   7.5   4.1 | -26.3 -15.3  315  25 13   8.0   4.4
 29000 -24.3 -11.7  320  26 13   7.5   4.1 | -23.9 -11.0  315  24 12   8.0   4.4
 28000 -22.0  -7.6  320  25 13   7.6   4.2 | -21.6  -6.9  315  23 12   7.3   4.0
 27000 -19.7  -3.5  320  23 12   7.6   4.2 | -19.4  -2.9  315  22 12   7.3   4.0
 26000 -17.5   0.5  315  22 11   7.6   4.2 | -17.3   0.9  310  22 11   7.3   4.0
 25000 -15.2   4.6  315  20 10   7.0   3.8 | -15.1   4.8  310  22 11   6.6   3.6
 24000 -13.2   8.2  315  20 10   6.7   3.7 | -13.3   8.1  305  22 11   6.3   3.5
 23000 -11.2  11.8  310  20 10   6.7   3.7 | -11.4  11.5  305  22 12   6.3   3.5
 22000  -9.3  15.3  310  19 10   5.6   3.1 |  -9.5  14.9  305  23 12   5.9   3.2
 21000  -7.9  17.8  310  20 10   5.1   2.8 |  -7.9  17.8  305  24 12   5.7   3.1
 20000  -6.4  20.5  310  21 11   5.2   2.8 |  -6.2  20.8  305  24 13   5.7   3.1
 19500  -5.7  21.7  315  22 11   5.2   2.9 |  -5.4  22.3  310  25 13   5.7   3.1
 19000  -5.0  23.0  315  22 11   5.4   3.0 |  -4.6  23.7  310  24 13   5.3   2.9
 18500  -4.2  24.4  315  22 11   5.4   3.0 |  -3.8  25.2  310  24 12   5.4   2.9
 18000  -3.5  25.7  315  22 11   6.0   3.3 |  -3.0  26.6  310  23 12   5.3   2.9
 17500  -2.6  27.3  320  21 11   6.3   3.4 |  -2.3  27.9  315  22 11   5.3   2.9
 17000  -1.7  28.9  325  21 11   6.3   3.5 |  -1.6  29.1  320  20 10   5.3   2.9
 16500  -0.7  30.7  330  20 10   6.5   3.5 |  -0.9  30.4  325  19 10   5.5   3.0
 16000   0.3  32.5  335  20 10   6.4   3.5 |   0.2  32.4  335  16  8   6.0   3.3
 15500   1.8  35.2  345  19 10   7.2   4.0 |   1.2  34.2  340  15  8   7.5   4.1
 15000   2.9  37.2  350  18  9   7.1   3.9 |   2.3  36.1  345  13  7   7.4   4.1
 14500   4.1  39.4  355  18  9   7.7   4.2 |   3.5  38.3  350  12  6   7.9   4.3
 14000   5.3  41.5  360  17  9   7.7   4.2 |   4.7  40.5  355  10  5   7.9   4.3
 13500   6.4  43.5  360  16  8   7.7   4.2 |   6.0  42.8  360   9  4   8.2   4.5
 13000   7.4  45.3  360  15  8   7.8   4.3 |   7.2  45.0  360   8  4   8.3   4.6
 12500   8.5  47.3  005  14  7   7.6   4.2 |   8.4  47.1  005   8  4   7.7   4.2
 12000   9.5  49.1  005  13  7   7.5   4.1 |   9.5  49.1  005   7  4   7.4   4.1
 11500  10.5  50.9  010  12  6   7.4   4.1 |  10.5  50.9  005   6  3   7.5   4.1
 11000  11.5  52.7  010  11  6   7.1   3.9 |  11.6  52.9  015   5  3   7.3   4.0
 10500  12.5  54.5  015  11  6   3.1   1.7 |  12.7  54.9  030   5  2   2.7   1.5
 10250  12.6  54.7  020  11  6   4.5   2.4 |  12.8  55.0  035   5  2   3.9   2.1
 10000  13.2  55.8  025  11  6  10.8   5.9 |  13.4  56.1  040   4  2  10.9   6.0
  9750  13.9  57.0  025  11  6   9.8   5.4 |  14.0  57.2  050   4  2   9.6   5.3
  9500  14.5  58.1  030  11  6   7.7   4.2 |  14.7  58.5  060   4  2   7.8   4.3
  9250  14.9  58.8  035  11  6   5.3   2.9 |  15.0  59.0  060   3  2   6.1   3.3
  9000  15.4  59.7  035  11  6   7.5   4.1 |  15.5  59.9  065   2  1   8.9   4.9
  8750  16.0  60.8  040  11  6   8.3   4.6 |  16.1  61.0  065   2  1   9.7   5.3
  8500  16.5  61.7  040  11  6   7.2   4.0 |  16.7  62.1  070   2  1   9.7   5.3
  8250  17.0  62.6  040  11  5   6.4   3.5 |  17.4  63.3  070   1  1   9.9   5.4
  8000  17.4  63.3  040  10  5   7.0   3.8 |  18.1  64.6  070   1  1   9.8   5.4
  7750  18.0  64.4  035  10  5   7.1   3.9 |  18.8  65.8  070   1  1   9.9   5.4
  7500  18.4  65.1  035   9  5   5.9   3.2 |  19.6  67.3  065   1  1  10.2   5.6
  7250  18.8  65.8  030   8  4   5.4   3.0 |  20.3  68.5  060   1  1  10.4   5.7
  7000  19.2  66.6  025   8  4   5.0   2.7 |  21.1  70.0  055   1  1  10.0   5.5
  6750  19.6  67.3  015   7  4   5.6   3.1 |  21.8  71.2  060   1  1   9.9   5.4
  6500  20.0  68.0  010   6  3   7.7   4.2 |  22.6  72.7  060   1  1  10.5   5.7
  6250  20.6  69.1  360   5  3   7.7   4.2 |  23.4  74.1  055   1  1  10.3   5.6
  6000  21.1  70.0  350   5  3   8.7   4.7 |  24.2  75.6  050   1  1  11.2   6.1
  5750  21.8  71.2  340   4  2  12.9   7.1 |  25.2  77.4  045   1  0  17.8   9.8
  5500  22.9  73.2  340   4  2  16.9   9.2 |  26.8  80.2  045   1  1  25.8  14.2

           07/01/2015 at 1500 MDT          |       07/01/2015 at 1800 MDT
                                           |
K index... +25.7  LI... -2.5               | K index... +28.5  LI... -2.2
CAPE... +279.4  CIN... -23.6               | CAPE... +127.1  CIN... -23.9
                                           |
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 -67.4 -89.3  295  31 16  -1.2  -0.7 | -67.4 -89.3  285  32 17  -1.1  -0.6
 45000 -64.0 -83.2  295  42 22   8.0   4.4 | -63.9 -83.0  280  44 22   8.0   4.4
 40000 -51.8 -61.2  295  42 22   8.7   4.8 | -51.7 -61.1  280  40 20   8.9   4.9
 38000 -46.6 -51.9  295  40 21   8.7   4.8 | -46.3 -51.3  290  38 20   8.9   4.9
 36000 -41.4 -42.5  295  38 19   8.6   4.7 | -41.0 -41.8  300  37 19   8.6   4.7
 34000 -36.2 -33.2  295  35 18   8.6   4.7 | -35.9 -32.6  305  37 19   8.4   4.6
 32000 -31.1 -24.0  300  33 17   9.4   5.2 | -30.3 -22.5  315  38 19   8.8   4.8
 30000 -25.9 -14.6  305  29 15   7.7   4.2 | -25.8 -14.4  315  34 18   7.6   4.2
 29000 -23.7 -10.7  310  27 14   7.7   4.2 | -23.5 -10.3  315  33 17   7.6   4.2
 28000 -21.5  -6.7  310  26 13   7.0   3.8 | -21.3  -6.3  315  31 16   7.0   3.8
 27000 -19.4  -2.9  310  24 13   7.0   3.9 | -19.3  -2.7  315  30 15   7.0   3.9
 26000 -17.3   0.9  305  23 12   7.0   3.9 | -17.2   1.0  315  29 15   7.1   3.9
 25000 -15.3   4.5  305  22 11   6.4   3.5 | -15.2   4.6  320  28 14   6.3   3.4
 24000 -13.5   7.7  305  23 12   6.1   3.3 | -13.5   7.7  320  26 13   5.8   3.2
 23000 -11.8  10.8  310  24 12   6.1   3.3 | -11.8  10.8  325  25 13   5.8   3.2
 22000 -10.0  14.0  310  25 13   5.7   3.2 | -10.1  13.8  325  23 12   5.6   3.1
 21000  -8.4  16.9  315  24 12   5.6   3.1 |  -8.5  16.7  320  20 10   5.4   3.0
 20000  -6.7  19.9  315  22 12   5.6   3.1 |  -6.9  19.6  315  17  9   5.5   3.0
 19500  -5.9  21.4  320  22 11   5.7   3.1 |  -6.2  20.8  315  16  8   5.5   3.0
 19000  -5.0  23.0  320  21 11   6.9   3.8 |  -5.3  22.5  310  15  8   6.2   3.4
 18500  -4.0  24.8  315  20 10   6.8   3.7 |  -4.4  24.1  305  16  8   6.2   3.4
 18000  -3.0  26.6  315  19 10   6.9   3.8 |  -3.5  25.7  300  16  8   6.5   3.6
 17500  -1.9  28.6  315  17  9   6.9   3.8 |  -2.6  27.3  295  17  9   6.7   3.7
 17000  -0.9  30.4  310  16  8   6.9   3.8 |  -1.6  29.1  295  18  9   6.8   3.7
 16500  -0.0  32.0  310  15  8   5.6   3.1 |  -0.0  32.0  295  15  8   7.3   4.0
 16000   1.2  34.2  315  13  7   5.9   3.2 |   1.0  33.8  290  13  7   7.4   4.1
 15500   2.1  35.8  320  12  6   6.7   3.7 |   2.2  36.0  290  11  6   7.9   4.4
 15000   3.1  37.6  330  11  6   6.5   3.6 |   3.4  38.1  290   9  5   8.0   4.4
 14500   4.2  39.6  335   9  5   8.2   4.5 |   4.5  40.1  285   7  3   7.4   4.1
 14000   5.4  41.7  340   7  4   8.1   4.5 |   5.6  42.1  275   5  2   7.4   4.1
 13500   6.6  43.9  345   6  3   8.0   4.4 |   6.8  44.2  255   3  2   8.0   4.4
 13000   7.7  45.9  350   4  2   8.0   4.4 |   8.0  46.4  225   3  2   8.1   4.5
 12500   8.9  48.0  360   2  1   8.3   4.6 |   9.2  48.6  195   4  2   8.7   4.8
 12000  10.2  50.4  015   2  1   8.5   4.7 |  10.6  51.1  190   4  2   9.1   5.0
 11500  11.4  52.5  040   1  1   8.2   4.5 |  11.9  53.4  185   4  2   9.1   5.0
 11000  12.5  54.5  115   1  1   7.8   4.3 |  13.2  55.8  185   5  2   8.7   4.8
 10500  13.7  56.7  150   2  1   4.8   2.6 |  14.4  57.9  185   5  2   5.0   2.7
 10250  13.9  57.0  150   3  1   6.5   3.6 |  14.6  58.3  190   5  2   6.3   3.4
 10000  14.7  58.5  155   3  1  11.7   6.4 |  15.5  59.9  190   4  2  12.2   6.7
  9750  15.4  59.7  155   3  2  10.9   6.0 |  16.3  61.3  190   4  2  11.1   6.1
  9500  16.2  61.2  160   3  2   9.0   4.9 |  17.1  62.8  190   4  2   9.5   5.2
  9250  16.6  61.9  160   3  2   7.7   4.2 |  17.6  63.7  190   4  2   8.2   4.5
  9000  17.3  63.1  160   3  2  10.6   5.8 |  18.3  64.9  190   4  2  10.2   5.6
  8750  18.1  64.6  165   3  2  11.2   6.2 |  19.0  66.2  190   4  2  10.6   5.8
  8500  18.8  65.8  165   3  1  10.7   5.8 |  19.8  67.6  195   4  2  10.2   5.6
  8250  19.6  67.3  165   3  1  10.5   5.8 |  20.5  68.9  195   4  2   9.9   5.5
  8000  20.4  68.7  165   3  1  10.0   5.5 |  21.3  70.3  200   4  2  10.1   5.5
  7750  21.1  70.0  165   3  1   9.4   5.2 |  22.0  71.6  200   3  2  10.0   5.5
  7500  21.8  71.2  165   3  1   9.9   5.4 |  22.8  73.0  205   3  2   9.8   5.4
  7250  22.6  72.7  170   3  1  10.2   5.6 |  23.5  74.3  205   3  2   9.6   5.2
  7000  23.3  73.9  170   3  1   9.7   5.3 |  24.2  75.6  205   3  2   9.8   5.4
  6750  24.0  75.2  170   3  1   9.8   5.3 |  24.9  76.8  210   3  2  10.2   5.6
  6500  24.8  76.6  175   2  1  10.7   5.8 |  25.7  78.3  215   3  2  10.2   5.6
  6250  25.6  78.1  175   2  1  11.7   6.4 |  26.5  79.7  215   3  2  10.5   5.7
  6000  26.5  79.7  175   2  1   9.1   5.0 |  27.2  81.0  220   3  1   9.4   5.1
  5750  27.1  80.8  175   2  1  13.9   7.6 |  27.9  82.2  220   3  1  11.9   6.5
  5500  28.7  83.7  180   2  1  28.8  15.8 |  29.1  84.4  225   3  1  19.6  10.7
________________________________________________________________________________

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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