Soaring Guidance
Issued by NWS Denver/Boulder, CO

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000
UXUS97 KBOU 241333
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
0732 MDT Sunday, August 24, 2014

This forecast is for Sunday, August 24, 2014:

If the trigger temperature of 74.7 F/23.7 C is reached...then
   Thermal Soaring Index....................... Good
   Maximum rate of lift........................ 793 ft/min (4.0 m/s)
   Maximum height of thermals.................. 16350 ft MSL (11065 ft AGL)

Forecast maximum temperature................... 83.0 F/28.8 C
Time of trigger temperature.................... 1030 MDT
Time of overdevelopment........................ 1500 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................. 13540 ft MSL (8255 ft AGL)
Thermal soaring outlook for Monday 08/25....... Good

Wave Soaring Index............................. Good
Wave Soaring Index trend (to 1800 MDT)......... No change
Height of stable layer (12-18K ft MSL)......... 18054 ft MSL (12769 ft AGL)
Weak PVA/NVA (through 1800 MDT)................ Weak NVA
Potential height of wave....................... 34015 ft MSL (28730 ft AGL)
Wave soaring outlook for Monday 08/25.......... Good

Remarks...

Sunrise/Sunset.................... 06:20:01 / 19:44:10 MDT
Total possible sunshine........... 13 hr 24 min 9 sec (804 min 9 sec)
Altitude of sun at 13:01:41 MDT... 61.15 degrees

Upper air data from rawinsonde observation taken on 08/24/2014 at 0600 MDT

Freezing level.................. 13696 ft MSL (8411 ft AGL)
Convective condensation level... 15627 ft MSL (10342 ft AGL)
Lifted condensation level....... 16118 ft MSL (10832 ft AGL)
Lifted index.................... -0.2
K index......................... +19.8

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  -63.2 -81.8   240   45   23  -1.0  -0.6   88.7 191.6    35.0      M    M
 45000  -55.9 -68.6   235   46   24   4.2   2.3   76.5 169.7    29.9      M    M
 40000  -51.7 -61.1   240   53   27   0.3   0.2   59.4 138.9    20.7      M    M
 38000  -52.4 -62.3   240   56   29  -1.3  -0.7   49.7 121.4    14.6      M    M
 36000  -50.5 -58.9   240   59   30   5.8   3.2   44.1 111.4    11.1      M    M
 34000  -46.3 -51.3   245   69   35   8.4   4.6   41.7 107.1     9.7      M    M
 32000  -40.9 -41.6   240   63   33   9.7   5.3   41.1 105.9     9.4      M    M
 30000  -35.2 -31.4   235   60   31   9.4   5.1   40.9 105.6     9.5      M    M
 29000  -32.4 -26.3   235   57   29   9.4   5.2   40.7 105.3     9.5      M    M
 28000  -29.9 -21.8   235   53   27   4.0   2.2   40.2 104.3     9.2      M    M
 27000  -28.2 -18.8   240   49   25   7.6   4.2   37.8 100.1     7.4      M    M
 26000  -25.6 -14.1   240   45   23   8.8   4.8   37.3  99.2     7.1      M    M
 25000  -22.8  -9.0   240   42   22   9.4   5.2   37.2  99.0     7.1      M    M
 24000  -20.0  -4.0   240   40   21   8.6   4.7   37.1  98.8     7.1      M    M
 23000  -17.4   0.7   240   41   21   9.0   4.9   36.7  98.1     6.8      M    M
 22000  -14.6   5.7   240   42   22   9.1   5.0   36.5  97.7     6.7      M    M
 21000  -11.9  10.6   240   43   22   9.3   5.1   36.4  97.5     6.7      M    M
 20000   -9.3  15.3   240   44   23   5.8   3.2   36.0  96.8     6.5      M    M
 19500   -8.4  16.9   245   43   22   5.5   3.0   35.3  95.6     6.0      M    M
 19000   -7.3  18.9   250   42   22   5.1   2.8   34.9  94.9     5.6      M    M
 18500   -6.8  19.8   250   42   22   7.3   4.0   34.0  93.2     4.7      M    M
 18000   -6.4  20.5   245   42   22 -15.1  -8.3   32.9  91.2     3.6      M    M
 17500   -8.2  17.2   245   42   22   9.3   5.1   29.4  85.0     0.4      M    M
 17000   -6.9  19.6   240   42   22   8.8   4.8   29.3  84.7     0.2      M    M
 16500   -5.6  21.9   240   41   21   8.9   4.9   29.1  84.4     0.1      M    M
 16000   -4.4  24.1   245   40   21   6.0   3.3   28.8  83.9    -0.2    968  4.9
 15500   -3.6  25.5   250   40   21   5.0   2.7   28.0  82.4    -0.9    930  4.7
 15000   -2.9  26.8   255   41   21   4.9   2.7   27.2  80.9    -1.6    893  4.5
 14500   -2.1  28.2   255   38   20   4.5   2.4   26.4  79.5    -2.3    856  4.3
 14000   -0.5  31.1   250   33   17   8.8   4.8   25.8  78.4    -2.9    785  4.0
 13500    0.8  33.4   250   29   15   8.8   4.8   25.6  78.1    -3.1    731  3.7
 13000    2.1  35.8   250   25   13   8.8   4.9   25.5  77.9    -3.2    677  3.4
 12500    3.4  38.1   250   21   11   8.8   4.9   25.4  77.7    -3.4    623  3.2
 12000    4.7  40.5   250   18    9   8.8   4.9   25.3  77.5    -3.5    569  2.9
 11500    6.0  42.8   245   17    9   8.9   4.9   25.1  77.2    -3.7    515  2.6
 11000    7.3  45.1   235   16    8   8.9   4.9   24.9  76.9    -3.9    462  2.3
 10500    8.6  47.5   220   16    8   8.8   4.8   24.8  76.6    -4.1    408  2.1
 10250    9.3  48.7   210   16    8   9.3   5.1   24.7  76.5    -4.2    381  1.9
 10000   10.0  50.0   210   16    8   9.6   5.3   24.7  76.4    -4.2    352  1.8
  9750   10.7  51.3   215   17    9   9.8   5.4   24.7  76.4    -4.2    324  1.6
  9500   11.4  52.5   215   18    9   8.6   4.7   24.7  76.4    -4.3    295  1.5
  9250   11.9  53.4   220   18    9   7.3   4.0   24.5  76.1    -4.5    272  1.4
  9000   12.5  54.5   220   19   10   7.6   4.2   24.3  75.8    -4.7    248  1.3
  8750   13.0  55.4   220   18    9   7.6   4.2   24.2  75.5    -4.9    225  1.1
  8500   13.6  56.5   220   16    8   7.4   4.0   24.0  75.2    -5.1    201  1.0
  8250   14.1  57.4   215   15    8   8.5   4.6   23.8  74.9    -5.3    177  0.9
  8000   14.6  58.3   215   14    7   1.6   0.9   23.6  74.5    -5.5    156  0.8
  7750   14.4  57.9   205   12    6  -3.5  -1.9   22.6  72.7    -6.5    155  0.8
  7500   14.4  57.9   200   11    6   4.0   2.2   21.9  71.4    -7.2    148  0.8
  7250   14.8  58.6   185   10    5   7.1   3.9   21.6  71.0    -7.5    126  0.6
  7000   15.3  59.5   175   10    5   6.2   3.4   21.4  70.5    -7.7    104  0.5
  6750   15.8  60.4   170   11    6   6.5   3.6   21.1  70.0    -8.0     82  0.4
  6500   16.3  61.3   170   12    6   6.3   3.4   20.9  69.6    -8.3     60  0.3
  6250   16.8  62.2   165   14    7   7.0   3.9   20.6  69.1    -8.5     38  0.2
  6000   17.0  62.6   165   15    8  -4.9  -2.7   20.2  68.3    -9.0     24  0.1
  5750   15.9  60.6   165   10    5 -14.4  -7.9   18.5  65.3   -10.9     50  0.3
  5500   14.8  58.6   165    5    3 -10.3  -5.6   16.9  62.4   -12.8     77  0.4

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

           08/24/2014 at 0900 MDT          |       08/24/2014 at 1200 MDT
                                           |
K index... +18.4  LI... +1.0               | K index... +27.3  LI... +0.6
CAPE... +0.9  CIN... -19.7                 | CAPE... +157.7  CIN... -32.5
                                           |
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 -59.0 -74.2  250  27 14   2.3   1.3 | -59.5 -75.1  235  25 13   2.7   1.5
 45000 -55.7 -68.3  250  46 24   1.8   1.0 | -56.1 -69.0  250  40 21   0.9   0.5
 40000 -53.1 -63.6  255  64 33   2.5   1.4 | -54.4 -65.9  265  71 37   5.2   2.9
 38000 -51.0 -59.8  255  67 34   3.6   2.0 | -51.4 -60.5  260  70 36   5.1   2.8
 36000 -48.8 -55.8  255  70 36   3.6   2.0 | -48.3 -54.9  260  69 35   5.1   2.8
 34000 -44.4 -47.9  255  68 35   8.1   4.4 | -44.0 -47.2  260  66 34   8.2   4.5
 32000 -39.6 -39.3  250  64 33   8.1   4.5 | -39.1 -38.4  255  62 32   8.2   4.5
 30000 -35.1 -31.2  250  58 30   7.2   3.9 | -34.3 -29.7  255  58 30   8.0   4.4
 29000 -32.9 -27.2  250  55 28   7.2   4.0 | -31.9 -25.4  255  56 29   8.0   4.4
 28000 -30.8 -23.4  250  52 27   7.2   3.9 | -29.5 -21.1  255  53 27   8.1   4.4
 27000 -28.5 -19.3  250  50 26   7.8   4.3 | -26.9 -16.4  255  50 26   6.8   3.7
 26000 -26.2 -15.2  250  47 24   7.8   4.3 | -24.9 -12.8  255  47 24   6.8   3.7
 25000 -23.9 -11.0  250  45 23   7.8   4.3 | -22.9  -9.2  255  44 22   6.7   3.7
 24000 -21.3  -6.3  250  43 22   9.0   4.9 | -20.6  -5.1  255  41 21   8.0   4.4
 23000 -18.6  -1.5  250  40 21   9.0   4.9 | -18.2  -0.8  250  39 20   8.1   4.4
 22000 -15.9   3.4  245  37 19   9.2   5.0 | -15.9   3.4  250  37 19   8.0   4.4
 21000 -13.7   7.3  245  35 18   6.2   3.4 | -13.3   8.1  250  36 19   8.7   4.8
 20000 -11.9  10.6  245  33 17   6.1   3.4 | -10.7  12.7  250  35 18   8.7   4.8
 19500 -11.0  12.2  245  32 16   6.1   3.4 |  -9.4  15.1  250  34 18   8.7   4.8
 19000 -10.1  13.8  245  31 16   5.9   3.2 |  -8.1  17.4  250  34 17   6.8   3.7
 18500  -9.3  15.3  250  31 16   5.5   3.0 |  -7.3  18.9  255  36 18   5.8   3.2
 18000  -8.5  16.7  250  31 16   5.5   3.0 |  -6.5  20.3  255  38 19   5.9   3.2
 17500  -7.7  18.1  255  31 16   6.0   3.3 |  -5.9  21.4  260  39 20   2.4   1.3
 17000  -6.4  20.5  255  31 16   6.0   3.3 |  -5.6  21.9  260  39 20   2.8   1.5
 16500  -5.5  22.1  255  31 16   6.3   3.5 |  -5.2  22.6  260  39 20   3.4   1.9
 16000  -4.6  23.7  260  31 16   6.3   3.5 |  -4.7  23.5  260  37 19   3.8   2.1
 15500  -3.7  25.3  260  31 16   5.9   3.2 |  -4.3  24.3  260  34 17   4.8   2.6
 15000  -2.8  27.0  260  29 15   5.8   3.2 |  -3.3  26.1  255  31 16   7.9   4.3
 14500  -2.0  28.4  260  27 14   6.4   3.5 |  -2.2  28.0  255  27 14   7.8   4.3
 14000  -1.0  30.2  260  25 13   7.6   4.2 |  -0.6  30.9  250  22 11   7.8   4.3
 13500   0.1  32.2  260  24 12   7.6   4.2 |   0.6  33.1  245  19 10   7.7   4.2
 13000   1.3  34.3  260  22 11   7.9   4.3 |   1.7  35.1  240  17  9   7.6   4.2
 12500   2.4  36.3  260  20 10   7.9   4.3 |   2.8  37.0  235  16  8   7.9   4.3
 12000   3.6  38.5  260  19 10   8.4   4.6 |   4.1  39.4  225  15  8   9.3   5.1
 11500   4.8  40.6  255  17  9   8.4   4.6 |   5.4  41.7  220  15  7   9.2   5.1
 11000   6.0  42.8  255  16  8   8.8   4.8 |   6.8  44.2  215  14  7   8.5   4.7
 10500   7.3  45.1  250  14  7   7.0   3.8 |   8.1  46.6  210  14  7   4.9   2.7
 10250   7.7  45.9  250  13  7   4.8   2.6 |   8.3  46.9  210  14  7   6.0   3.3
 10000   8.2  46.8  245  13  7   8.8   4.9 |   9.1  48.4  210  13  7  11.7   6.4
  9750   8.9  48.0  245  12  6  11.2   6.2 |   9.8  49.6  205  13  7  10.4   5.7
  9500   9.7  49.5  240  11  6  10.2   5.6 |  10.6  51.1  205  12  6  10.0   5.5
  9250  10.4  50.7  240  10  5   7.4   4.0 |  11.2  52.2  200  11  6   7.8   4.3
  9000  10.9  51.6  235  10  5   7.3   4.0 |  11.8  53.2  195  10  5   8.1   4.5
  8750  11.5  52.7  235  10  5   9.2   5.0 |  12.4  54.3  195   9  4   8.9   4.9
  8500  12.1  53.8  235  10  5   8.4   4.6 |  13.0  55.4  190   7  4   9.2   5.1
  8250  12.7  54.9  230   9  5   7.8   4.3 |  13.7  56.7  185   6  3  10.5   5.7
  8000  13.2  55.8  230   9  5   7.5   4.1 |  14.5  58.1  185   6  3  10.2   5.6
  7750  13.8  56.8  230   9  5   7.6   4.2 |  15.2  59.4  185   6  3   9.5   5.2
  7500  14.3  57.7  230  10  5   6.8   3.7 |  15.9  60.6  185   5  3   9.9   5.4
  7250  14.8  58.6  230  10  5   6.0   3.3 |  16.7  62.1  185   5  3  10.3   5.6
  7000  15.2  59.4  230   9  5   6.0   3.3 |  17.4  63.3  185   5  3  10.1   5.5
  6750  15.7  60.3  230   9  5   5.4   3.0 |  18.2  64.8  185   5  2   9.9   5.4
  6500  16.0  60.8  230   9  5   4.2   2.3 |  18.9  66.0  185   5  2  10.5   5.8
  6250  16.3  61.3  225   8  4   4.5   2.5 |  19.8  67.6  190   4  2  11.4   6.3
  6000  16.6  61.9  225   7  3   2.0   1.1 |  20.6  69.1  190   4  2   9.8   5.4
  5750  16.6  61.9  215   5  3   4.8   2.7 |  21.3  70.3  190   4  2  13.6   7.4
  5500  17.4  63.3  210   4  2  18.9  10.4 |  22.7  72.9  190   4  2  25.1  13.8

           08/24/2014 at 1500 MDT          |       08/24/2014 at 1800 MDT
                                           |
K index... +31.1  LI... -2.6               | K index... +28.1  LI... -2.6
CAPE... +476.1  CIN... -19.9               | CAPE... +453.0  CIN... -21.7
                                           |
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 -60.7 -77.3  245  28 14   1.8   1.0 | -61.1 -78.0  250  31 16   1.1   0.6
 45000 -57.9 -72.2  250  44 23   2.2   1.2 | -58.9 -74.0  260  51 26   2.5   1.4
 40000 -54.1 -65.4  265  74 38   5.9   3.2 | -55.0 -67.0  265  69 36   5.8   3.2
 38000 -50.8 -59.4  265  71 37   5.5   3.0 | -51.3 -60.3  265  67 35   6.1   3.4
 36000 -47.5 -53.5  260  68 35   5.6   3.1 | -47.6 -53.7  260  65 34   6.1   3.4
 34000 -43.2 -45.8  260  63 33   7.8   4.3 | -42.7 -44.9  260  61 32   7.7   4.2
 32000 -38.5 -37.3  255  58 30   7.8   4.3 | -38.0 -36.4  255  57 29   7.8   4.3
 30000 -33.7 -28.7  255  54 28   8.1   4.4 | -33.4 -28.1  260  54 28   7.7   4.2
 29000 -31.3 -24.3  255  52 27   8.1   4.4 | -31.1 -24.0  260  53 27   7.7   4.2
 28000 -28.3 -18.9  255  51 26   7.7   4.2 | -28.8 -19.8  260  51 26   7.7   4.2
 27000 -26.2 -15.2  255  49 25   6.9   3.8 | -26.5 -15.7  260  51 26   7.5   4.1
 26000 -24.1 -11.4  255  47 24   6.9   3.8 | -24.3 -11.7  265  51 26   7.5   4.1
 25000 -22.1  -7.8  260  46 23   6.9   3.8 | -22.1  -7.8  265  51 26   7.5   4.1
 24000 -20.0  -4.0  260  44 23   6.8   3.8 | -19.9  -3.8  265  50 26   7.2   3.9
 23000 -18.0  -0.4  260  42 22   6.9   3.8 | -17.8  -0.0  265  48 25   7.2   3.9
 22000 -16.0   3.2  260  41 21   6.9   3.8 | -15.7   3.7  265  46 24   7.2   4.0
 21000 -13.9   7.0  260  39 20   7.4   4.1 | -13.6   7.5  265  42 21   7.0   3.8
 20000 -11.7  10.9  260  38 20   7.5   4.1 | -11.6  11.1  260  36 19   7.0   3.8
 19500 -10.6  12.9  260  37 19   7.5   4.1 | -10.6  12.9  260  33 17   7.0   3.9
 19000  -9.5  14.9  255  37 19   6.9   3.8 |  -9.6  14.7  255  31 16   7.0   3.8
 18500  -8.5  16.7  260  37 19   6.7   3.7 |  -8.6  16.5  255  30 15   7.0   3.8
 18000  -7.6  18.3  260  38 20   6.7   3.7 |  -7.6  18.3  255  28 15   7.0   3.8
 17500  -6.7  19.9  260  36 18   6.2   3.4 |  -6.5  20.3  255  26 14   7.5   4.1
 17000  -5.9  21.4  255  32 16   6.2   3.4 |  -4.9  23.2  250  22 11   7.5   4.1
 16500  -5.0  23.0  255  29 15   7.3   4.0 |  -3.7  25.3  245  21 11   8.5   4.6
 16000  -3.9  25.0  250  25 13   7.6   4.2 |  -2.5  27.5  245  21 11   8.4   4.6
 15500  -2.8  27.0  250  23 12   8.0   4.4 |  -1.3  29.7  240  20 11   7.9   4.3
 15000  -1.6  29.1  245  21 11   8.7   4.8 |  -0.1  31.8  240  20 10   7.9   4.3
 14500  -0.3  31.5  240  19 10   8.7   4.8 |   1.0  33.8  235  19 10   8.4   4.6
 14000   1.5  34.7  235  18  9   8.3   4.5 |   2.3  36.1  230  18  9   8.7   4.8
 13500   2.7  36.9  225  17  9   8.4   4.6 |   3.6  38.5  225  17  9   8.9   4.9
 13000   3.9  39.0  220  16  8   8.6   4.7 |   5.0  41.0  220  16  8   9.3   5.1
 12500   5.2  41.4  215  15  8   8.7   4.8 |   6.3  43.3  220  15  8   9.2   5.1
 12000   6.5  43.7  215  14  7   9.0   5.0 |   7.7  45.9  215  14  7   9.1   5.0
 11500   7.8  46.0  210  13  7   9.0   4.9 |   9.0  48.2  215  13  7   9.1   5.0
 11000   9.1  48.4  205  11  6   8.5   4.7 |  10.4  50.7  210  12  6   9.0   4.9
 10500  10.4  50.7  200  10  5   5.5   3.0 |  11.8  53.2  205  11  6   6.2   3.4
 10250  10.6  51.1  200  10  5   6.0   3.3 |  12.1  53.8  205  10  5   6.9   3.8
 10000  11.3  52.3  195   8  4  10.4   5.7 |  12.9  55.2  205   9  5  11.3   6.2
  9750  12.0  53.6  195   7  4   9.4   5.1 |  13.6  56.5  205   8  4  10.2   5.6
  9500  12.7  54.9  190   6  3   9.1   5.0 |  14.4  57.9  200   7  4  10.1   5.6
  9250  13.3  55.9  185   5  2   8.5   4.7 |  15.1  59.2  200   6  3   8.1   4.4
  9000  14.0  57.2  185   4  2   9.8   5.4 |  15.6  60.1  195   4  2   7.7   4.2
  8750  14.8  58.6  185   4  2  10.6   5.8 |  16.2  61.2  195   3  2   8.2   4.5
  8500  15.5  59.9  180   3  2  10.3   5.7 |  16.7  62.1  190   2  1   8.5   4.7
  8250  16.3  61.3  185   3  2  10.2   5.6 |  17.4  63.3  180   1  0   9.8   5.4
  8000  17.1  62.8  185   3  1   9.8   5.4 |  18.1  64.6  000   0  0  10.2   5.6
  7750  17.8  64.0  185   3  1   9.4   5.1 |  18.9  66.0  000   0  0  10.0   5.5
  7500  18.5  65.3  190   2  1   9.8   5.4 |  19.6  67.3  015   1  0   9.9   5.4
  7250  19.2  66.6  190   2  1  10.3   5.6 |  20.3  68.5  005   1  0   9.8   5.4
  7000  20.0  68.0  190   2  1  10.1   5.5 |  21.1  70.0  355   1  1   9.7   5.3
  6750  20.7  69.3  195   2  1   9.8   5.4 |  21.8  71.2  350   1  1   9.2   5.1
  6500  21.5  70.7  195   2  1  10.2   5.6 |  22.5  72.5  350   2  1   9.9   5.4
  6250  22.3  72.1  200   2  1  11.0   6.0 |  23.3  73.9  345   2  1  10.7   5.9
  6000  23.1  73.6  210   1  1   9.9   5.4 |  24.0  75.2  345   2  1  10.1   5.5
  5750  23.8  74.8  215   1  1  13.5   7.4 |  24.8  76.6  345   2  1  11.0   6.0
  5500  25.2  77.4  225   1  1  23.9  13.1 |  25.7  78.3  345   2  1  14.5   8.0
________________________________________________________________________________

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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