Soaring Guidance
Issued by NWS Denver/Boulder, CO

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000
UXUS97 KBOU 251158
SRGBOU

Soaring Forecast
National Weather Service Denver/Boulder, Colorado
0558 MDT Monday, August 25, 2014

This forecast is for Monday, August 25, 2014:

If the trigger temperature of 77.4 F/25.2 C is reached...then
   Thermal Soaring Index....................... Good
   Maximum rate of lift........................ 583 ft/min (3.0 m/s)
   Maximum height of thermals.................. 10515 ft MSL (5228 ft AGL)

Forecast maximum temperature................... 80.0 F/27.1 C
Time of trigger temperature.................... 1145 MDT
Time of overdevelopment........................ None
Middle/high clouds during soaring window....... None
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 8175 ft MSL (2887 ft AGL)
Thermal soaring outlook for Tuesday 08/26...... Fair

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....................... 40787 ft MSL (35500 ft AGL)
Wave soaring outlook for Tuesday 08/26......... Fair

Remarks...

Sunrise/Sunset.................... 06:20:58 / 19:42:41 MDT
Total possible sunshine........... 13 hr 21 min 44 sec (801 min 44 sec)
Altitude of sun at 13:01:25 MDT... 60.81 degrees

Upper air data from numerical model forecast valid on 08/25/2014 at 0600 MDT

Freezing level.................. 15021 ft MSL (9734 ft AGL)
Convective condensation level... 15124 ft MSL (9837 ft AGL)
Lifted condensation level....... 14191 ft MSL (8903 ft AGL)
Lifted index.................... -1.4
K index......................... +27.9

Height  Temperature  Wind  Wind Spd  Lapse Rate  ConvectionT  Thermal  Lift Rate
ft MSL  deg C deg F   Dir   kt  m/s  C/km F/kft  deg C deg F   Index    fpm  m/s
--------------------------------------------------------------------------------
 50000  -63.0 -81.4   245   42   22   0.6   0.3      M     M       M      M    M
 45000  -60.9 -77.6   245   59   30   3.9   2.1      M     M       M      M    M
 40000  -54.8 -66.6   245   65   33   6.9   3.8      M     M       M      M    M
 38000  -50.9 -59.6   240   61   31   6.6   3.6      M     M       M      M    M
 36000  -46.9 -52.4   240   57   30   6.6   3.6      M     M       M      M    M
 34000  -41.9 -43.4   235   54   28   7.6   4.2      M     M       M      M    M
 32000  -37.4 -35.3   240   52   27   7.6   4.2      M     M       M      M    M
 30000  -32.9 -27.2   245   46   24   7.3   4.0   42.8 109.0    12.2      M    M
 29000  -30.8 -23.4   245   42   22   7.4   4.0   41.8 107.3    11.6      M    M
 28000  -28.6 -19.5   250   39   20   7.3   4.0   41.1 106.0    11.1      M    M
 27000  -26.5 -15.7   250   39   20   7.1   3.9   40.0 103.9    10.4      M    M
 26000  -24.3 -11.7   245   39   20   7.1   3.9   38.9 102.1     9.7      M    M
 25000  -22.2  -8.0   240   39   20   7.0   3.9   38.1 100.5     9.0      M    M
 24000  -19.9  -3.8   240   38   19   7.9   4.3   37.2  99.0     8.5      M    M
 23000  -17.4   0.7   240   36   19   8.0   4.4   36.6  97.8     8.1      M    M
 22000  -15.0   5.0   235   35   18   8.1   4.5   36.0  96.8     7.7      M    M
 21000  -12.9   8.8   235   35   18   6.6   3.6   35.0  94.9     6.9      M    M
 20000  -11.0  12.2   240   35   18   6.7   3.7   33.8  92.9     6.0      M    M
 19500  -10.0  14.0   240   35   18   6.7   3.7   33.3  92.0     5.6      M    M
 19000   -9.0  15.8   240   35   18   6.8   3.7   32.9  91.1     5.2      M    M
 18500   -8.0  17.6   240   34   17   6.9   3.8   32.3  90.2     4.8      M    M
 18000   -7.0  19.4   240   32   17   7.0   3.8   31.9  89.4     4.3      M    M
 17500   -6.0  21.2   240   31   16   7.2   4.0   31.4  88.5     3.9      M    M
 17000   -4.9  23.2   235   29   15   7.3   4.0   31.0  87.8     3.5      M    M
 16500   -3.3  26.1   235   27   14   8.4   4.6   30.5  86.9     2.9      M    M
 16000   -2.2  28.0   235   25   13   8.4   4.6   30.2  86.4     2.6      M    M
 15500   -1.0  30.2   230   24   12   9.0   4.9   30.1  86.1     2.4      M    M
 15000    0.3  32.5   230   23   12   9.0   4.9   29.9  85.9     2.2      M    M
 14500    1.6  34.9   225   23   12   8.7   4.8   29.8  85.7     2.0      M    M
 14000    2.8  37.0   225   23   12   8.6   4.7   29.6  85.3     1.8      M    M
 13500    4.1  39.4   225   22   12   8.7   4.8   29.4  85.0     1.6      M    M
 13000    5.4  41.7   225   22   11   8.8   4.8   29.3  84.7     1.5      M    M
 12500    6.7  44.1   225   21   11   8.7   4.8   29.1  84.4     1.3      M    M
 12000    7.9  46.2   225   19   10   8.1   4.5   28.9  84.0     1.1      M    M
 11500    9.1  48.4   220   18    9   8.0   4.4   28.6  83.5     0.8      M    M
 11000   10.2  50.4   220   16    8   6.7   3.7   28.2  82.8     0.4      M    M
 10500   11.2  52.2   225   14    7   4.9   2.7   27.8  82.0    -0.0    378  1.9
 10250   11.4  52.5   225   13    7   3.9   2.2   27.3  81.1    -0.5    363  1.8
 10000   11.8  53.2   225   12    6   6.9   3.8   27.0  80.6    -0.8    342  1.7
  9750   12.4  54.3   230   10    5   7.6   4.2   26.8  80.2    -1.0    318  1.6
  9500   13.0  55.4   240    9    5   6.8   3.7   26.6  79.9    -1.2    294  1.5
  9250   13.4  56.1   250    8    4   4.5   2.4   26.3  79.3    -1.5    274  1.4
  9000   13.7  56.7   260    8    4   4.7   2.6   25.9  78.5    -1.9    257  1.3
  8750   14.1  57.4   275    8    4   6.0   3.3   25.5  78.0    -2.2    237  1.2
  8500   14.6  58.3   285    8    4   5.2   2.9   25.2  77.4    -2.5    217  1.1
  8250   14.9  58.8   300    9    4   4.8   2.6   24.8  76.7    -2.9    199  1.0
  8000   15.2  59.4   310   10    5   3.8   2.1   24.4  76.0    -3.3    182  0.9
  7750   15.4  59.7   315   11    5   3.8   2.1   24.0  75.1    -3.8    168  0.9
  7500   15.6  60.1   320   12    6   0.2   0.1   23.4  74.2    -4.4    155  0.8
  7250   15.4  59.7   330   12    6  -3.3  -1.8   22.5  72.5    -5.3    154  0.8
  7000   15.2  59.4   335   13    7  -2.7  -1.5   21.5  70.7    -6.3    154  0.8
  6750   14.9  58.8   340   14    7  -3.5  -1.9   20.6  69.0    -7.3    154  0.8
  6500   14.7  58.5   350   15    8  -3.2  -1.8   19.5  67.2    -8.3    154  0.8
  6250   14.5  58.1   350   14    7  -2.5  -1.4   18.6  65.4    -9.3    153  0.8
  6000   14.3  57.7   355   13    7  -3.6  -2.0   17.6  63.7   -10.2    152  0.8
  5750   14.0  57.2   360   13    7  -2.5  -1.4   16.6  61.9   -11.3    153  0.8
  5500   13.9  57.0   350    9    4   2.3   1.3   15.9  60.7   -12.0    147  0.7

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

           08/25/2014 at 0900 MDT          |       08/25/2014 at 1200 MDT
                                           |
K index... +24.5  LI... -0.3               | K index... +19.6  LI... -0.3
CAPE... +153.9  CIN... -43.5               | CAPE... +124.9  CIN... -89.2
                                           |
Height Temperature  Wnd WndSpd  Lapse Rate | Temperature  Wnd WndSpd  Lapse Rate
ft MSL deg C deg F  Dir kt m/s  C/km F/kft | deg C deg F  Dir kt m/s  C/km F/kft
--------------------------------------------------------------------------------
 50000 -62.8 -81.0  240  43 22   1.1   0.6 | -62.6 -80.7  240  45 23   1.1   0.6
 45000 -60.3 -76.5  245  58 30   3.3   1.8 | -59.9 -75.8  240  61 32   3.9   2.1
 40000 -55.1 -67.2  240  61 31   7.2   4.0 | -53.5 -64.3  240  63 32   6.3   3.5
 38000 -51.0 -59.8  240  58 30   6.8   3.7 | -49.7 -57.5  240  61 31   6.3   3.4
 36000 -46.9 -52.4  235  55 28   6.8   3.7 | -46.0 -50.8  240  59 30   6.3   3.4
 34000 -42.3 -44.1  240  50 26   6.8   3.8 | -42.3 -44.1  240  57 29   6.2   3.4
 32000 -38.2 -36.8  240  44 23   6.7   3.7 | -38.5 -37.3  245  54 28   6.3   3.4
 30000 -33.8 -28.8  240  41 21   7.4   4.1 | -34.2 -29.6  240  51 26   7.7   4.2
 29000 -31.6 -24.9  240  39 20   7.4   4.1 | -31.9 -25.4  240  48 25   7.7   4.2
 28000 -29.4 -20.9  240  38 19   7.6   4.2 | -29.7 -21.5  240  46 24   7.7   4.2
 27000 -27.0 -16.6  235  37 19   7.8   4.3 | -27.1 -16.8  235  44 23   6.9   3.8
 26000 -24.7 -12.5  225  38 20   7.8   4.3 | -25.0 -13.0  235  42 22   6.9   3.8
 25000 -22.3  -8.1  220  39 20   7.9   4.3 | -22.9  -9.2  230  41 21   7.0   3.8
 24000 -19.9  -3.8  220  39 20   7.8   4.3 | -20.6  -5.1  230  38 19   8.2   4.5
 23000 -17.6   0.3  225  37 19   7.8   4.3 | -18.1  -0.6  225  35 18   8.2   4.5
 22000 -15.3   4.5  225  36 18   7.8   4.3 | -15.6   3.9  225  32 16   8.0   4.4
 21000 -13.0   8.6  230  33 17   7.5   4.1 | -13.3   8.1  230  27 14   7.6   4.2
 20000 -10.8  12.6  230  30 16   7.6   4.1 | -11.1  12.0  235  23 12   7.6   4.2
 19500  -9.7  14.5  235  29 15   7.6   4.2 | -10.0  14.0  240  20 10   7.5   4.1
 19000  -8.6  16.5  235  28 14   7.6   4.2 |  -8.8  16.2  240  19 10   8.5   4.7
 18500  -7.5  18.5  235  29 15   7.6   4.2 |  -7.5  18.5  245  20 10   8.5   4.7
 18000  -6.3  20.7  240  29 15   7.4   4.1 |  -6.3  20.7  245  21 11   8.2   4.5
 17500  -5.4  22.3  240  29 15   6.4   3.5 |  -5.2  22.6  250  21 11   7.6   4.2
 17000  -4.4  24.1  245  29 15   6.5   3.6 |  -4.1  24.6  255  21 11   7.7   4.2
 16500  -3.0  26.6  245  28 14   6.8   3.7 |  -3.0  26.6  260  21 11   7.6   4.2
 16000  -2.1  28.2  245  27 14   6.8   3.7 |  -1.9  28.6  255  22 11   7.6   4.2
 15500  -1.1  30.0  245  26 13   7.5   4.1 |  -0.7  30.7  255  22 11   7.2   3.9
 15000  -0.1  31.8  250  25 13   7.6   4.1 |   0.2  32.4  255  21 11   7.0   3.8
 14500   1.0  33.8  250  24 12   8.3   4.6 |   1.2  34.2  260  21 11   7.3   4.0
 14000   2.2  36.0  255  22 12   8.6   4.7 |   3.0  37.4  255  21 11   8.3   4.5
 13500   3.4  38.1  255  21 11   8.6   4.7 |   4.1  39.4  255  20 10   7.9   4.3
 13000   4.7  40.5  255  20 10   8.6   4.7 |   5.2  41.4  255  18 10   7.7   4.2
 12500   5.9  42.6  260  18  9   8.6   4.7 |   6.2  43.2  255  17  9   7.4   4.1
 12000   7.2  45.0  260  17  9   8.4   4.6 |   7.2  45.0  250  15  8   7.1   3.9
 11500   8.5  47.3  265  16  8   8.2   4.5 |   8.2  46.8  245  12  6   7.5   4.1
 11000   9.6  49.3  265  15  8   7.1   3.9 |   9.3  48.7  245  10  5   7.9   4.3
 10500  10.7  51.3  270  14  7   5.4   2.9 |  10.5  50.9  250   8  4   5.2   2.8
 10250  10.9  51.6  270  13  7   3.2   1.8 |  10.8  51.4  250   8  4   4.8   2.6
 10000  11.3  52.3  275  12  6   5.7   3.1 |  11.3  52.3  250   7  4   9.1   5.0
  9750  11.7  53.1  275  11  6   7.0   3.8 |  12.0  53.6  255   6  3   9.9   5.5
  9500  12.2  54.0  280  10  5   5.4   2.9 |  12.7  54.9  265   6  3   6.4   3.5
  9250  12.5  54.5  285  10  5   2.8   1.5 |  13.0  55.4  270   5  3   2.2   1.2
  9000  12.7  54.9  290  10  5   3.0   1.7 |  13.1  55.6  280   5  3   2.5   1.4
  8750  13.0  55.4  300  10  5   4.8   2.6 |  13.3  55.9  295   5  3   3.2   1.8
  8500  13.3  55.9  305  10  5   1.5   0.8 |  13.5  56.3  305   6  3  -0.7  -0.4
  8250  13.2  55.8  310  11  5  -1.6  -0.9 |  13.2  55.8  320   6  3  -4.0  -2.2
  8000  13.1  55.6  315  11  6  -2.1  -1.2 |  12.9  55.2  330   7  3  -4.4  -2.4
  7750  12.8  55.0  320  12  6  -4.3  -2.4 |  12.5  54.5  335   7  4  -4.8  -2.7
  7500  12.4  54.3  325  13  7  -4.2  -2.3 |  12.3  54.1  340   7  4   2.2   1.2
  7250  12.1  53.8  335  12  6  -3.3  -1.8 |  12.7  54.9  350   6  3   6.1   3.3
  7000  11.8  53.2  345  11  6  -3.8  -2.1 |  13.0  55.4  005   6  3   5.3   2.9
  6750  11.5  52.7  355  11  6  -0.2  -0.1 |  13.5  56.3  015   6  3   8.7   4.8
  6500  11.7  53.1  005  10  5   3.5   1.9 |  14.2  57.6  015   6  3  11.1   6.1
  6250  12.0  53.6  360   9  5   3.4   1.9 |  15.0  59.0  015   5  3  10.5   5.7
  6000  12.3  54.1  355   8  4   3.8   2.1 |  15.8  60.4  015   5  3  11.7   6.4
  5750  12.8  55.0  350   8  4  11.0   6.0 |  16.9  62.4  015   5  3  17.9   9.8
  5500  14.0  57.2  350   8  4  21.5  11.8 |  18.5  65.3  015   6  3  24.7  13.5

           08/25/2014 at 1500 MDT          |       08/25/2014 at 1800 MDT
                                           |
K index... +29.9  LI... -2.4               | K index... +32.2  LI... -2.5
CAPE... +464.2  CIN... -66.0               | CAPE... +612.5  CIN... -20.2
                                           |
Height Temperature  Wnd WndSpd  Lapse Rate | Temperature  Wnd WndSpd  Lapse Rate
ft MSL deg C deg F  Dir kt m/s  C/km F/kft | deg C deg F  Dir kt m/s  C/km F/kft
--------------------------------------------------------------------------------
 50000 -62.9 -81.2  240  46 24   1.3   0.7 | -63.0 -81.4  240  45 23   0.9   0.5
 45000 -59.9 -75.8  240  65 34   4.1   2.3 | -61.0 -77.8  240  67 34   2.9   1.6
 40000 -53.2 -63.8  240  67 35   5.7   3.1 | -55.8 -68.4  250  66 34   7.0   3.8
 38000 -49.7 -57.5  245  66 34   5.7   3.1 | -51.5 -60.7  245  57 29   7.1   3.9
 36000 -46.3 -51.3  245  64 33   5.7   3.1 | -47.3 -53.1  240  48 24   6.9   3.8
 34000 -42.4 -44.3  245  59 30   6.8   3.7 | -42.0 -43.6  240  43 22   9.0   4.9
 32000 -38.3 -36.9  245  53 27   6.9   3.8 | -36.6 -33.9  235  39 20   8.8   4.9
 30000 -33.5 -28.3  240  50 26   8.6   4.7 | -31.7 -25.1  235  36 18   8.1   4.4
 29000 -30.9 -23.6  240  49 25   8.6   4.7 | -29.3 -20.7  230  34 17   8.1   4.5
 28000 -27.8 -18.0  235  48 25   7.0   3.8 | -26.3 -15.3  230  32 16   7.5   4.1
 27000 -25.9 -14.6  235  45 23   6.3   3.5 | -24.1 -11.4  230  31 16   7.4   4.0
 26000 -24.1 -11.4  230  42 22   6.3   3.5 | -22.0  -7.6  225  30 16   7.4   4.1
 25000 -22.2  -8.0  230  39 20   6.4   3.5 | -19.8  -3.6  225  29 15   7.3   4.0
 24000 -20.0  -4.0  230  35 18   7.6   4.2 | -17.8  -0.0  225  29 15   6.6   3.6
 23000 -17.8  -0.0  230  32 16   7.6   4.2 | -15.9   3.4  220  29 15   6.7   3.7
 22000 -15.5   4.1  235  28 14   7.6   4.2 | -13.9   7.0  215  29 15   6.7   3.7
 21000 -13.3   8.1  240  25 13   7.5   4.1 | -11.9  10.6  215  28 14   6.9   3.8
 20000 -11.2  11.8  240  22 11   7.5   4.1 |  -9.9  14.2  210  27 14   6.9   3.8
 19500 -10.1  13.8  245  20 10   7.6   4.2 |  -9.0  15.8  210  26 14   7.0   3.9
 19000  -9.0  15.8  245  19 10   7.2   3.9 |  -8.0  17.6  205  26 13   5.9   3.3
 18500  -7.9  17.8  240  19 10   7.2   3.9 |  -7.2  19.0  200  25 13   6.0   3.3
 18000  -6.9  19.6  235  18  9   7.3   4.0 |  -6.3  20.7  200  24 12   6.0   3.3
 17500  -5.8  21.6  235  18  9   7.4   4.1 |  -5.4  22.3  195  24 12   5.9   3.3
 17000  -4.7  23.5  235  18  9   7.5   4.1 |  -4.6  23.7  195  24 12   6.0   3.3
 16500  -3.6  25.5  235  18  9   7.1   3.9 |  -3.8  25.2  195  23 12   5.8   3.2
 16000  -2.6  27.3  235  19 10   7.2   3.9 |  -2.9  26.8  190  23 12   5.8   3.2
 15500  -1.6  29.1  235  19 10   7.6   4.2 |  -2.1  28.2  190  22 12   5.6   3.1
 15000  -0.5  31.1  230  20 10   7.9   4.3 |  -1.3  29.7  190  22 11   5.5   3.0
 14500   0.7  33.3  230  20 10   8.3   4.6 |  -0.6  30.9  190  21 11   6.0   3.3
 14000   2.6  36.7  230  19 10   9.3   5.1 |   1.1  34.0  185  20 10   7.8   4.3
 13500   3.9  39.0  230  18 10   9.3   5.1 |   2.2  36.0  185  20 10   9.1   5.0
 13000   5.3  41.5  225  18  9   9.3   5.1 |   3.6  38.5  180  19 10   9.8   5.4
 12500   6.6  43.9  225  17  9   9.0   5.0 |   5.1  41.2  180  18  9   8.8   4.8
 12000   7.9  46.2  225  16  8   8.7   4.8 |   6.1  43.0  180  16  8   7.5   4.1
 11500   9.2  48.6  225  14  7   8.4   4.6 |   7.2  45.0  180  14  7   6.8   3.8
 11000  10.4  50.7  225  13  7   7.7   4.2 |   8.0  46.4  180  12  6   5.7   3.1
 10500  11.5  52.7  220  11  6   4.4   2.4 |   8.9  48.0  180   9  5   3.5   1.9
 10250  11.7  53.1  220  11  5   4.7   2.6 |   9.1  48.4  180   9  5   3.5   1.9
 10000  12.4  54.3  220   9  5   9.2   5.0 |   9.4  48.9  175   7  4   6.8   3.7
  9750  13.0  55.4  215   8  4   8.7   4.8 |   9.9  49.8  170   5  3   6.3   3.5
  9500  13.6  56.5  210   6  3   6.0   3.3 |  10.3  50.5  160   3  2   6.2   3.4
  9250  13.9  57.0  205   5  3   2.0   1.1 |  10.7  51.3  155   3  1   6.1   3.4
  9000  14.1  57.4  205   4  2   2.2   1.2 |  11.2  52.2  145   2  1   9.0   4.9
  8750  14.2  57.6  195   2  1   2.2   1.2 |  12.0  53.6  135   2  1  11.0   6.0
  8500  14.4  57.9  130   1  0   2.1   1.2 |  12.7  54.9  120   2  1   9.2   5.1
  8250  14.4  57.9  060   2  1   1.2   0.7 |  13.3  55.9  100   2  1   8.1   4.4
  8000  14.4  57.9  055   5  2   4.1   2.2 |  13.9  57.0  080   2  1   8.7   4.8
  7750  14.8  58.6  055   6  3   7.8   4.3 |  14.6  58.3  065   2  1   9.2   5.1
  7500  15.4  59.7  055   6  3   9.2   5.1 |  15.3  59.5  055   2  1   9.4   5.2
  7250  16.1  61.0  055   6  3  10.3   5.6 |  16.0  60.8  045   2  1   9.5   5.2
  7000  16.9  62.4  050   6  3   9.8   5.4 |  16.7  62.1  035   3  1   9.4   5.2
  6750  17.6  63.7  050   6  3  10.1   5.6 |  17.4  63.3  030   3  2   9.3   5.1
  6500  18.4  65.1  050   6  3  10.8   5.9 |  18.1  64.6  020   3  2   9.5   5.2
  6250  19.2  66.6  050   6  3  11.4   6.3 |  18.8  65.8  015   3  2   9.3   5.1
  6000  20.0  68.0  050   6  3   9.5   5.2 |  19.5  67.1  010   3  2  10.2   5.6
  5750  20.8  69.4  050   6  3  14.7   8.1 |  20.3  68.5  010   3  2  12.0   6.6
  5500  22.4  72.3  050   6  3  28.5  15.6 |  21.2  70.2  010   3  2  12.0   6.6
________________________________________________________________________________

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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