Soaring Guidance
Issued by NWS Pueblo, CO

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000
UXUS97 KPUB 261230
SRGPUB

Soaring Forecast
National Weather Service Pueblo, Colorado
0630 MDT Thursday, March 26, 2015

This forecast is for Thursday, March 26, 2015:

If the trigger temperature of 41.2 F/5.1 C is reached...then
   Thermal Soaring Index....................... Good
   Maximum rate of lift........................ 500 ft/min (2.5 m/s)
   Maximum height of thermals.................. 15072 ft MSL (8314 ft AGL)

Forecast maximum temperature................... 50.0 F/10.5 C
Time of trigger temperature.................... 1115 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................. 12909 ft MSL (6151 ft AGL)
Thermal soaring outlook for Friday 03/27....... Excellent

Wave Soaring Index............................. Not available

Remarks...

Sunrise/Sunset.................... 06:53:18 / 19:15:40 MDT
Total possible sunshine........... 12 hr 22 min 22 sec (742 min 22 sec)
Altitude of sun at 13:04:38 MDT... 53.36 degrees

Upper air data from numerical model forecast valid on 03/26/2015 at 0600 MDT

Freezing level.................. 7480 ft MSL (722 ft AGL)
Additional freezing level....... 7618 ft MSL (860 ft AGL)
Convective condensation level... 15367 ft MSL (8609 ft AGL)
Lifted condensation level....... 14927 ft MSL (8170 ft AGL)
Lifted index.................... +2.0
K index......................... +5.2

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  -56.0 -68.8   345   31   16   1.6   0.9      M     M       M      M    M
 45000  -53.4 -64.1   350   46   24   1.0   0.6      M     M       M      M    M
 40000  -54.2 -65.6   350   53   27  -0.5  -0.3      M     M       M      M    M
 38000  -54.5 -66.1   350   55   28  -0.5  -0.2      M     M       M      M    M
 36000  -54.7 -66.5   355   56   29  -0.5  -0.2      M     M       M      M    M
 34000  -55.0 -67.0   355   57   30   2.7   1.5      M     M       M      M    M
 32000  -51.4 -60.5   005   58   30   5.3   2.9      M     M       M      M    M
 30000  -48.0 -54.4   005   59   30   7.2   4.0   21.8  71.2     9.0      M    M
 29000  -45.9 -50.6   005   61   31   7.1   3.9   20.6  69.1     8.2      M    M
 28000  -43.7 -46.7   005   63   32   7.1   3.9   19.6  67.3     7.5      M    M
 27000  -41.6 -42.9   005   64   33   7.6   4.2   18.7  65.7     6.9      M    M
 26000  -39.0 -38.2   005   64   33   8.7   4.8   18.2  64.8     6.6      M    M
 25000  -36.4 -33.5   360   64   33   8.7   4.8   17.8  64.1     6.3      M    M
 24000  -33.8 -28.8   360   63   33   8.7   4.8   17.6  63.6     6.2      M    M
 23000  -31.3 -24.3   360   60   31   8.2   4.5   17.0  62.6     5.8      M    M
 22000  -28.8 -19.8   355   57   29   8.2   4.5   16.4  61.6     5.4      M    M
 21000  -26.4 -15.5   355   54   28   7.5   4.1   16.0  60.7     5.0      M    M
 20000  -24.3 -11.7   350   50   26   7.1   3.9   14.9  58.9     4.2      M    M
 19500  -23.2  -9.8   345   49   25   7.1   3.9   14.5  58.1     3.8      M    M
 19000  -22.1  -7.8   345   47   24   7.1   3.9   14.1  57.3     3.5      M    M
 18500  -21.1  -6.0   345   46   24   7.3   4.0   13.7  56.6     3.1      M    M
 18000  -20.0  -4.0   345   46   24   7.5   4.1   13.3  55.9     2.8      M    M
 17500  -18.9  -2.0   345   46   24   7.5   4.1   12.9  55.2     2.5      M    M
 17000  -17.7   0.1   345   45   23   7.5   4.1   12.5  54.5     2.1      M    M
 16500  -16.6   2.1   345   44   22   7.6   4.2   12.1  53.8     1.8      M    M
 16000  -15.6   3.9   345   42   22   5.8   3.2   11.7  53.0     1.4      M    M
 15500  -14.4   6.1   340   39   20   5.5   3.0   10.6  51.1     0.4      M    M
 15000  -13.6   7.5   340   36   19   5.1   2.8    9.9  49.8    -0.3    686  3.5
 14500  -12.8   9.0   340   34   17   5.1   2.8    9.1  48.4    -1.0    648  3.3
 14000  -12.0  10.4   340   32   16   5.3   2.9    8.4  47.1    -1.7    610  3.1
 13500  -11.3  11.7   345   31   16   5.3   2.9    7.7  45.8    -2.4    572  2.9
 13000  -10.4  13.3   345   30   15   6.6   3.6    7.1  44.7    -3.0    532  2.7
 12500   -9.4  15.1   345   30   15   6.7   3.7    6.6  43.8    -3.5    487  2.5
 12000   -8.3  17.1   345   31   16   8.4   4.6    6.2  43.2    -3.9    439  2.2
 11750   -7.7  18.1   345   32   17   8.7   4.8    6.1  43.0    -4.0    412  2.1
 11500   -7.0  19.4   345   33   17   9.0   4.9    6.0  42.9    -4.0    385  2.0
 11250   -6.3  20.7   345   35   18   7.6   4.2    6.0  42.7    -4.1    358  1.8
 11000   -5.9  21.4   345   35   18   5.5   3.0    5.7  42.2    -4.4    337  1.7
 10750   -5.5  22.1   340   34   18   5.4   3.0    5.3  41.6    -4.8    318  1.6
 10500   -5.1  22.8   340   34   17   5.4   3.0    5.0  41.0    -5.1    299  1.5
 10250   -4.7  23.5   340   33   17   5.7   3.1    4.7  40.4    -5.5    280  1.4
 10000   -4.3  24.3   335   31   16   6.2   3.4    4.4  39.9    -5.8    259  1.3
  9750   -3.8  25.2   335   29   15   6.5   3.6    4.1  39.4    -6.1    238  1.2
  9500   -3.3  26.1   335   27   14   6.7   3.7    3.9  39.0    -6.3    216  1.1
  9250   -2.8  27.0   335   24   13   7.0   3.9    3.7  38.6    -6.6    194  1.0
  9000   -2.3  27.9   335   22   11   7.0   3.9    3.5  38.2    -6.8    171  0.9
  8750   -1.8  28.8   335   20   10   8.0   4.4    3.3  37.9    -7.0    147  0.7
  8500   -1.1  30.0   330   18    9   7.6   4.2    3.2  37.7    -7.1    121  0.6
  8250   -0.7  30.7   330   16    8   4.9   2.7    2.9  37.2    -7.4    100  0.5
  8000   -0.4  31.3   330   15    8   3.9   2.1    2.5  36.4    -7.9     83  0.4
  7750   -0.1  31.8   325   14    7   5.1   2.8    2.0  35.7    -8.3     67  0.3
  7500    0.1  32.2   320   13    7  -5.5  -3.0    1.5  34.7    -8.9     55  0.3
  7250   -0.9  30.4   315   10    5 -16.1  -8.8    0.2  32.3   -10.3     78  0.4
  7000   -1.9  28.6   305    8    4  -7.9  -4.4   -1.1  30.0   -11.6    101  0.5
  6750      M     M     M    M    M     M     M      M     M       M      M    M

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

           03/26/2015 at 0900 MDT          |       03/26/2015 at 1200 MDT
                                           |
K index... +8.3  LI... +277.5              | K index... +6.6  LI... +277.6
CAPE... 0.0  CIN... M                      | CAPE... 0.0  CIN... -1.0
                                           |
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 -55.9 -68.6  350  40 20   1.7   0.9 | -56.8 -70.2  350  42 22   1.9   1.0
 45000 -53.3 -63.9  355  55 28   0.9   0.5 | -54.0 -65.2  355  61 31   1.5   0.8
 40000 -54.7 -66.5  355  64 33  -1.0  -0.5 | -53.8 -64.8  355  70 36   0.0   0.0
 38000 -55.0 -67.0  355  64 33   0.0   0.0 | -54.2 -65.6  355  71 37  -1.2  -0.7
 36000 -55.0 -67.0  355  58 30   0.0   0.0 | -54.9 -66.8  360  69 36  -1.2  -0.7
 34000 -54.5 -66.1  360  55 28   6.1   3.4 | -55.2 -67.4  360  68 35   5.7   3.1
 32000 -51.2 -60.2  015  74 38   5.6   3.1 | -52.0 -61.6  010  78 40   5.4   2.9
 30000 -47.7 -53.9  020  89 46   6.7   3.7 | -48.5 -55.3  020  88 45   8.5   4.7
 29000 -45.7 -50.3  015  83 43   6.7   3.7 | -46.1 -51.0  015  83 43   8.3   4.5
 28000 -43.7 -46.7  010  77 40   6.7   3.7 | -43.0 -45.4  015  78 40   8.3   4.5
 27000 -41.7 -43.1  005  72 37   7.4   4.1 | -40.5 -40.9  010  74 38   8.9   4.9
 26000 -39.1 -38.4  005  71 36   8.5   4.6 | -37.8 -36.0  010  74 38   9.1   5.0
 25000 -36.6 -33.9  005  70 36   8.5   4.7 | -35.0 -31.0  005  74 38   9.1   5.0
 24000 -34.1 -29.4  005  68 35   8.6   4.7 | -32.3 -26.1  005  74 38   8.7   4.8
 23000 -31.4 -24.5  360  65 34   9.1   5.0 | -29.8 -21.6  360  69 36   8.5   4.7
 22000 -28.6 -19.5  355  62 32   9.1   5.0 | -27.3 -17.1  355  64 33   8.5   4.7
 21000 -25.9 -14.6  355  60 31   8.6   4.7 | -24.7 -12.5  350  60 31   8.4   4.6
 20000 -23.4 -10.1  350  57 29   8.4   4.6 | -22.2  -8.0  345  56 29   8.5   4.6
 19500 -22.2  -8.0  350  56 29   8.4   4.6 | -21.0  -5.8  340  55 28   8.5   4.6
 19000 -20.9  -5.6  350  54 28   8.4   4.6 | -19.7  -3.5  340  53 28   8.5   4.7
 18500 -19.7  -3.5  350  53 27   7.2   3.9 | -18.5  -1.3  335  52 27   8.0   4.4
 18000 -18.7  -1.7  350  51 26   6.5   3.6 | -17.3   0.9  335  50 26   7.9   4.3
 17500 -17.8  -0.0  350  50 26   6.5   3.6 | -16.2   2.8  330  49 25   7.8   4.3
 17000 -16.7   1.9  350  48 25   8.0   4.4 | -15.1   4.8  325  46 24   7.5   4.1
 16500 -15.5   4.1  345  47 24   8.1   4.4 | -13.9   7.0  320  43 22   7.8   4.3
 16000 -14.0   6.8  345  44 23   5.8   3.2 | -13.1   8.4  315  40 21   4.2   2.3
 15500 -13.2   8.2  345  42 21   5.8   3.2 | -12.4   9.7  315  37 19   4.4   2.4
 15000 -12.2  10.0  345  39 20   6.6   3.6 | -11.7  10.9  315  34 17   4.5   2.5
 14500 -11.3  11.7  345  35 18   6.8   3.7 | -11.1  12.0  315  31 16   4.5   2.5
 14000 -10.4  13.3  340  32 16   3.8   2.1 | -10.1  13.8  315  26 13   4.3   2.4
 13500  -9.9  14.2  345  29 15   3.8   2.1 |  -9.5  14.9  315  23 12   4.4   2.4
 13000  -9.2  15.4  345  26 13   4.6   2.5 |  -8.8  16.2  315  21 11   4.2   2.3
 12500  -8.6  16.5  345  25 13   4.3   2.4 |  -8.2  17.2  325  20 10   3.9   2.2
 12000  -7.7  18.1  350  23 12   6.7   3.7 |  -7.4  18.7  335  20 10   6.4   3.5
 11750  -7.3  18.9  350  23 12   5.7   3.1 |  -7.0  19.4  335  19 10   5.8   3.2
 11500  -6.8  19.8  350  23 12   5.5   3.0 |  -6.6  20.1  340  19 10   5.8   3.2
 11250  -6.4  20.5  355  22 12   7.3   4.0 |  -6.1  21.0  340  18  9   6.5   3.5
 11000  -5.8  21.6  355  22 11   9.0   5.0 |  -5.6  21.9  340  17  9   7.9   4.3
 10750  -5.1  22.8  355  22 11   8.3   4.5 |  -5.0  23.0  340  17  9   8.2   4.5
 10500  -4.5  23.9  355  22 12   8.2   4.5 |  -4.4  24.1  345  16  8   8.2   4.5
 10250  -3.9  25.0  355  23 12   8.4   4.6 |  -3.8  25.2  345  15  8   7.8   4.3
 10000  -3.3  26.1  355  23 12   8.5   4.6 |  -3.2  26.2  340  14  7   7.8   4.3
  9750  -2.7  27.1  350  24 12   7.5   4.1 |  -2.6  27.3  340  13  7   9.3   5.1
  9500  -2.1  28.2  345  24 12   7.0   3.8 |  -1.9  28.6  335  12  6   9.8   5.4
  9250  -1.7  28.9  345  24 12   5.2   2.9 |  -1.2  29.8  335  11  6   8.8   4.8
  9000  -1.3  29.7  340  22 11   4.1   2.2 |  -0.6  30.9  330   9  5   7.9   4.3
  8750  -1.0  30.2  335  19 10   3.8   2.1 |  -0.0  32.0  325   8  4  10.0   5.5
  8500  -0.8  30.6  325  17  9   3.9   2.1 |   0.8  33.4  320   7  3  11.2   6.2
  8250  -0.4  31.3  320  15  8   5.5   3.0 |   1.6  34.9  320   6  3   9.9   5.4
  8000  -0.0  32.0  315  13  7   5.6   3.1 |   2.3  36.1  315   5  3   9.9   5.4
  7750   0.4  32.7  310  11  6   6.0   3.3 |   3.0  37.4  310   5  3  10.0   5.5
  7500   0.7  33.3  305  10  5   3.8   2.1 |   3.7  38.7  310   5  2   9.0   4.9
  7250   0.8  33.4  300   8  4   1.2   0.7 |   4.3  39.7  305   4  2   8.0   4.4
  7000   0.9  33.6  300   7  3   3.3   1.8 |   4.9  40.8  305   4  2   8.8   4.8
  6750     M     M    M   M  M     M     M |     M     M    M   M  M     M     M

           03/26/2015 at 1500 MDT          |       03/26/2015 at 1800 MDT
                                           |
K index... +13.7  LI... +275.8             | K index... +21.1  LI... +275.0
CAPE... +2.7  CIN... -4.1                  | CAPE... +11.4  CIN... -7.7
                                           |
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 -57.6 -71.7  345  42 22   2.5   1.4 | -57.3 -71.1  345  45 23   2.9   1.6
 45000 -53.9 -65.0  355  58 30   1.5   0.8 | -53.0 -63.4  350  59 30  -1.2  -0.6
 40000 -54.5 -66.1  355  72 37  -0.4  -0.2 | -54.7 -66.5  355  72 37  -1.1  -0.6
 38000 -55.2 -67.4  355  75 39  -1.8  -1.0 | -55.5 -67.9  355  76 39  -1.8  -1.0
 36000 -56.2 -69.2  355  77 40  -1.8  -1.0 | -56.6 -69.9  355  78 40  -1.8  -1.0
 34000 -56.5 -69.7  355  78 40   8.2   4.5 | -56.6 -69.9  355  80 41   9.4   5.2
 32000 -52.2 -62.0  005  77 40   7.2   3.9 | -51.5 -60.7  355  79 40   8.6   4.7
 30000 -47.8 -54.0  010  77 40   8.7   4.8 | -45.7 -50.3  360  75 39   8.5   4.7
 29000 -45.2 -49.4  005  76 39   8.7   4.8 | -43.2 -45.8  360  72 37   8.5   4.7
 28000 -41.9 -43.4  360  74 38   8.7   4.8 | -40.6 -41.1  360  69 36   8.5   4.7
 27000 -39.3 -38.7  360  74 38   8.7   4.8 | -38.1 -36.6  360  67 34   8.8   4.8
 26000 -36.7 -34.1  355  72 37   8.7   4.8 | -35.5 -31.9  360  67 34   8.8   4.8
 25000 -34.1 -29.4  355  70 36   8.7   4.8 | -32.8 -27.0  360  67 34   8.8   4.8
 24000 -31.5 -24.7  350  69 36   8.9   4.9 | -30.2 -22.4  355  67 34   8.8   4.8
 23000 -28.8 -19.8  350  68 35   9.0   4.9 | -27.6 -17.7  355  65 34   8.8   4.9
 22000 -26.2 -15.2  345  67 34   9.0   4.9 | -24.9 -12.8  350  64 33   8.9   4.9
 21000 -23.6 -10.5  345  65 34   7.3   4.0 | -22.4  -8.3  350  63 32   7.0   3.8
 20000 -21.4  -6.5  340  62 32   7.5   4.1 | -20.3  -4.5  350  62 32   7.3   4.0
 19500 -20.3  -4.5  340  60 31   7.5   4.1 | -19.2  -2.6  350  61 31   7.3   4.0
 19000 -19.2  -2.6  340  59 30   7.6   4.2 | -18.1  -0.6  350  61 31   7.6   4.1
 18500 -18.1  -0.6  340  57 29   7.1   3.9 | -17.2   1.0  350  60 31   4.1   2.2
 18000 -17.0   1.4  340  53 27   7.0   3.9 | -16.7   1.9  350  59 30   3.8   2.1
 17500 -16.0   3.2  335  49 25   6.7   3.7 | -16.2   2.8  350  58 30   4.8   2.6
 17000 -15.1   4.8  335  46 24   6.0   3.3 | -15.3   4.5  345  55 28   6.8   3.7
 16500 -14.2   6.4  335  44 23   6.2   3.4 | -14.3   6.3  345  51 26   6.9   3.8
 16000 -13.5   7.7  335  43 22   3.4   1.9 | -13.4   7.9  345  48 25   4.8   2.6
 15500 -13.0   8.6  340  42 22   3.6   2.0 | -12.7   9.1  345  45 23   4.9   2.7
 15000 -12.4   9.7  340  41 21   5.1   2.8 | -11.9  10.6  340  42 22   6.7   3.7
 14500 -11.6  11.1  335  37 19   5.3   2.9 | -10.3  13.5  335  35 18   7.0   3.8
 14000 -10.2  13.6  335  32 17   7.4   4.1 |  -9.1  15.6  330  32 17   9.2   5.1
 13500  -9.1  15.6  335  30 15   7.1   3.9 |  -7.8  18.0  325  31 16   9.0   4.9
 13000  -8.0  17.6  335  28 14   8.1   4.5 |  -6.4  20.5  320  29 15   9.6   5.3
 12500  -6.8  19.8  335  26 13   8.0   4.4 |  -5.0  23.0  315  28 14   9.7   5.3
 12000  -5.6  21.9  335  23 12   8.5   4.7 |  -3.7  25.3  315  26 13   8.1   4.4
 11750  -5.0  23.0  330  22 11   8.5   4.7 |  -3.1  26.4  310  24 13   7.8   4.3
 11500  -4.4  24.1  330  21 11   8.7   4.8 |  -2.5  27.5  310  23 12   8.2   4.5
 11250  -3.7  25.3  330  20 10   8.0   4.4 |  -2.0  28.4  310  22 11   7.0   3.8
 11000  -3.2  26.2  325  18  9   7.9   4.4 |  -1.5  29.3  310  20 10   6.2   3.4
 10750  -2.6  27.3  325  17  9   8.5   4.7 |  -1.0  30.2  310  18  9   6.8   3.7
 10500  -2.0  28.4  325  15  8   8.6   4.7 |  -0.5  31.1  310  17  9   6.8   3.8
 10250  -1.4  29.5  320  13  7   7.1   3.9 |  -0.0  32.0  310  15  8   6.1   3.3
 10000  -0.9  30.4  320  11  6   6.8   3.7 |   0.4  32.7  310  13  7   5.8   3.2
  9750  -0.4  31.3  315   9  5   9.2   5.0 |   0.9  33.6  310  11  6   7.1   3.9
  9500   0.4  32.7  310   7  4   9.7   5.3 |   1.4  34.5  315  10  5   7.4   4.0
  9250   1.0  33.8  305   6  3   9.2   5.0 |   2.0  35.6  320   8  4   7.6   4.2
  9000   1.7  35.1  305   5  3   8.8   4.8 |   2.5  36.5  320   7  4   7.6   4.2
  8750   2.4  36.3  300   5  3  10.2   5.6 |   3.1  37.6  320   6  3   8.9   4.9
  8500   3.2  37.8  300   5  2  10.8   5.9 |   3.8  38.8  330   5  3   9.9   5.4
  8250   4.0  39.2  300   4  2   9.9   5.4 |   4.5  40.1  335   5  3   9.3   5.1
  8000   4.7  40.5  300   4  2   9.8   5.4 |   5.2  41.4  340   5  2   9.0   5.0
  7750   5.4  41.7  300   4  2  10.1   5.6 |   5.9  42.6  340   4  2   9.9   5.5
  7500   6.2  43.2  300   4  2   9.5   5.2 |   6.6  43.9  350   5  2   6.9   3.8
  7250   6.8  44.2  300   4  2   8.5   4.7 |   6.9  44.4  350   4  2   3.1   1.7
  7000   7.4  45.3  300   3  2   9.3   5.1 |   7.1  44.8  350   4  2   6.1   3.3
  6750     M     M    M   M  M     M     M |     M     M    M   M  M     M     M
________________________________________________________________________________

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 Air Force Academy
in Colorado Springs, Colorado at

                   North Latitude:  38 deg 58 min 48.000 sec
                   West Longitude: 104 deg 49 min 12.000 sec
                   Elevation: 6572 feet (2003 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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