Soaring Guidance
Issued by NWS Pueblo, CO

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000
UXUS97 KPUB 051128
SRGPUB

Soaring Forecast
National Weather Service Pueblo, Colorado
0428 MST Friday, February 5, 2016

This forecast is for Friday, February 5, 2016:

If the trigger temperature of 26.3 F/-3.1 C is reached...then
   Thermal Soaring Index....................... Poor
   Maximum rate of lift........................ 102 ft/min (0.5 m/s)
   Maximum height of thermals.................. 12618 ft MSL (5860 ft AGL)

Forecast maximum temperature................... 29.0 F/-2.1 C
Time of trigger temperature.................... 1045 MST
Time of overdevelopment........................ None
Middle/high clouds during soaring window....... Broken/overcast opaque middle
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 8316 ft MSL (1558 ft AGL)
Thermal soaring outlook for Saturday 02/06..... Poor

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

Remarks...

Sunrise/Sunset.................... 07:01:44 / 17:23:17 MST
Total possible sunshine........... 10 hr 21 min 34 sec (621 min 34 sec)
Altitude of sun at 12:12:51 MST... 35.18 degrees

Upper air data from numerical model forecast valid on 02/05/2016 at 0500 MST

Freezing level.................. Entire airmass below 32 F / 0 C
Convective condensation level... 11822 ft MSL (5064 ft AGL)
Lifted condensation level....... 11629 ft MSL (4871 ft AGL)
Lifted index.................... +4.7
K index......................... +8.8

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  -54.1 -65.4   285   28   15   0.9   0.5      M     M       M      M    M
 45000  -52.6 -62.7   285   32   16   0.9   0.5      M     M       M      M    M
 40000  -48.7 -55.7   300   37   19   2.8   1.5      M     M       M      M    M
 38000  -47.2 -53.0   305   39   20   0.4   0.2      M     M       M      M    M
 36000  -46.8 -52.2   300   36   19   0.6   0.3      M     M       M      M    M
 34000  -46.4 -51.5   300   33   17   0.6   0.3      M     M       M      M    M
 32000  -46.5 -51.7   295   31   16  -0.5  -0.3      M     M       M      M    M
 30000  -46.9 -52.4   290   27   14  -0.5  -0.3      M     M       M      M    M
 29000  -47.1 -52.8   285   25   13  -0.7  -0.4   21.8  71.2    18.0      M    M
 28000  -47.3 -53.1   275   24   12  -0.8  -0.4   17.6  63.7    15.0      M    M
 27000  -47.5 -53.5   265   23   12  -0.8  -0.4   13.6  56.6    12.0      M    M
 26000  -47.4 -53.3   255   22   12   5.7   3.1   10.3  50.5     9.5      M    M
 25000  -45.7 -50.3   250   21   11   5.5   3.0    8.6  47.4     8.3      M    M
 24000  -44.1 -47.4   245   19   10   5.5   3.0    7.0  44.7     7.1      M    M
 23000  -42.3 -44.1   240   17    9   8.4   4.6    5.8  42.4     6.1      M    M
 22000  -39.8 -39.6   250   15    8   8.0   4.4    5.1  41.2     5.6      M    M
 21000  -37.4 -35.3   255   14    7   8.1   4.4    4.5  40.2     5.2      M    M
 20000  -35.2 -31.4   275   12    6   7.0   3.8    3.7  38.7     4.6      M    M
 19500  -34.2 -29.6   290   12    6   6.9   3.8    3.2  37.8     4.2      M    M
 19000  -33.1 -27.6   305   12    6   6.9   3.8    2.7  36.9     3.8      M    M
 18500  -32.1 -25.8   320   14    7   7.0   3.8    2.3  36.1     3.4      M    M
 18000  -31.1 -24.0   330   15    8   6.5   3.6    1.8  35.3     3.0      M    M
 17500  -30.1 -22.2   340   18    9   6.4   3.5    1.2  34.2     2.5      M    M
 17000  -29.2 -20.6   345   22   11   7.1   3.9    0.7  33.2     2.0      M    M
 16500  -28.0 -18.4   350   23   12   8.5   4.6    0.4  32.7     1.8      M    M
 16000  -26.7 -16.1   355   25   13   8.5   4.6    0.2  32.4     1.6      M    M
 15500  -25.4 -13.7   355   26   13   8.3   4.6   -0.0  31.9     1.4      M    M
 15000  -23.6 -10.5   360   27   14   8.1   4.4   -0.4  31.3     1.1      M    M
 14500  -22.4  -8.3   360   28   15   7.9   4.3   -0.7  30.7     0.8      M    M
 14000  -21.2  -6.2   005   29   15   8.2   4.5   -1.0  30.2     0.5      M    M
 13500  -20.0  -4.0   005   30   15   8.7   4.8   -1.2  29.9     0.3      M    M
 13000  -18.7  -1.7   005   31   16   8.5   4.7   -1.3  29.6     0.1      M    M
 12500  -17.5   0.5   005   32   16   8.2   4.5   -1.6  29.1    -0.1    481  2.4
 12000  -16.3   2.7   005   33   17   7.4   4.0   -1.8  28.7    -0.4    430  2.2
 11750  -15.8   3.6   005   34   17   6.8   3.7   -2.1  28.3    -0.6    408  2.1
 11500  -15.2   4.6   005   35   18   7.3   4.0   -2.3  27.9    -0.8    385  2.0
 11250  -14.7   5.5   005   35   18   7.2   4.0   -2.5  27.5    -1.0    361  1.8
 11000  -14.2   6.4   360   36   19   6.4   3.5   -2.7  27.2    -1.2    338  1.7
 10750  -13.7   7.3   360   36   19   6.7   3.7   -3.0  26.7    -1.5    317  1.6
 10500  -13.2   8.2   360   37   19   7.7   4.2   -3.2  26.3    -1.7    293  1.5
 10250  -12.6   9.3   360   37   19   7.4   4.1   -3.3  26.0    -1.9    269  1.4
 10000  -12.1  10.2   360   37   19   7.0   3.8   -3.5  25.7    -2.0    246  1.2
  9750  -11.5  11.3   355   36   19   7.8   4.3   -3.7  25.3    -2.3    222  1.1
  9500  -10.9  12.4   355   35   18   8.7   4.8   -3.8  25.1    -2.4    196  1.0
  9250  -10.3  13.5   355   34   18   8.3   4.5   -3.9  25.0    -2.4    169  0.9
  9000   -9.7  14.5   350   33   17   8.0   4.4   -4.0  24.7    -2.6    144  0.7
  8750   -9.1  15.6   350   32   17   8.1   4.4   -4.2  24.5    -2.7    118  0.6
  8500   -8.5  16.7   350   31   16   7.8   4.3   -4.3  24.3    -2.9     93  0.5
  8250   -7.9  17.8   345   30   15   6.6   3.6   -4.5  23.9    -3.1     70  0.4
  8000   -7.5  18.5   345   27   14   5.3   2.9   -4.8  23.4    -3.4     50  0.3
  7750   -7.1  19.2   345   25   13   7.4   4.1   -5.1  22.9    -3.7     30  0.2
  7500   -6.6  20.1   340   21   11   4.7   2.6   -5.3  22.5    -3.9      6  0.0
  7250   -6.5  20.3   340   18    9  -0.4  -0.2   -5.5  22.1    -4.2      M    M
  7000   -6.4  20.5   335   15    8   2.9   1.6   -5.8  21.6    -4.5      M    M
  6750      M     M     M    M    M     M     M      M     M       M      M    M

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

           02/05/2016 at 0800 MST          |       02/05/2016 at 1100 MST
                                           |
K index... +5.4  LI... +274.1              | K index... -8.2  LI... +275.0
CAPE... 0.0  CIN... M                      | CAPE... 0.0  CIN... -1.1
                                           |
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 -53.3 -63.9  285  24 12   1.1   0.6 | -53.4 -64.1  295  20 10   1.0   0.5
 45000 -51.5 -60.7  285  28 14   1.1   0.6 | -51.9 -61.4  295  25 13   1.0   0.5
 40000 -48.8 -55.8  305  29 15   1.9   1.0 | -50.1 -58.2  315  24 12   1.2   0.7
 38000 -47.7 -53.9  310  30 16   0.3   0.1 | -49.4 -56.9  325  24 12  -0.0  -0.0
 36000 -47.5 -53.5  320  28 15   0.4   0.2 | -49.4 -56.9  340  28 15   0.1   0.0
 34000 -47.2 -53.0  330  27 14   0.4   0.2 | -49.3 -56.7  350  34 18   0.1   0.0
 32000 -47.0 -52.6  340  28 14   0.4   0.2 | -49.3 -56.7  005  44 23   0.0   0.0
 30000 -46.7 -52.1  355  30 15   0.4   0.2 | -49.3 -56.7  020  56 29  -0.4  -0.2
 29000 -46.7 -52.1  355  30 15  -0.1  -0.1 | -48.5 -55.3  020  60 31   3.5   1.9
 28000 -46.7 -52.1  350  29 15  -0.1  -0.1 | -47.5 -53.5  020  64 33   3.5   1.9
 27000 -46.8 -52.2  350  29 15  -0.1  -0.1 | -46.4 -51.5  025  67 35   3.5   1.9
 26000 -46.6 -51.9  345  27 14   3.5   1.9 | -45.1 -49.2  025  69 35   6.0   3.3
 25000 -45.5 -49.9  340  22 11   3.4   1.9 | -43.4 -46.1  025  67 34   5.8   3.2
 24000 -44.5 -48.1  330  16  8   3.4   1.9 | -41.6 -42.9  025  65 33   5.8   3.2
 23000 -43.2 -45.8  320  13  7   7.4   4.1 | -39.9 -39.8  025  60 31   5.3   2.9
 22000 -41.1 -42.0  330  12  6   7.0   3.8 | -38.3 -36.9  025  51 26   5.4   2.9
 21000 -39.0 -38.2  340  11  6   7.0   3.8 | -36.7 -34.1  020  41 21   5.3   2.9
 20000 -36.7 -34.1  355  13  7   8.3   4.6 | -34.8 -30.6  020  35 18   6.8   3.7
 19500 -35.4 -31.7  360  15  8   8.4   4.6 | -33.8 -28.8  015  32 16   6.8   3.7
 19000 -34.2 -29.6  005  16  8   8.4   4.6 | -32.8 -27.0  015  29 15   6.8   3.7
 18500 -32.9 -27.2  005  18  9   8.4   4.6 | -31.8 -25.2  015  26 14   6.7   3.7
 18000 -31.7 -25.1  010  20 10   8.8   4.8 | -30.7 -23.3  010  25 13   8.1   4.5
 17500 -30.3 -22.5  005  21 11   8.9   4.9 | -29.5 -21.1  010  25 13   8.1   4.4
 17000 -29.0 -20.2  005  22 11   8.7   4.8 | -28.2 -18.8  005  25 13   8.6   4.7
 16500 -27.7 -17.9  005  23 12   8.5   4.6 | -26.9 -16.4  005  25 13   8.9   4.9
 16000 -26.5 -15.7  005  23 12   8.3   4.6 | -25.5 -13.9  360  26 13   8.7   4.8
 15500 -25.3 -13.5  005  24 12   7.5   4.1 | -23.7 -10.7  360  25 13   8.3   4.6
 15000 -23.6 -10.5  005  25 13   8.3   4.5 | -22.4  -8.3  355  25 13   8.5   4.7
 14500 -22.3  -8.1  005  26 13   8.7   4.8 | -21.1  -6.0  355  25 13   8.5   4.7
 14000 -21.0  -5.8  005  26 13   8.5   4.6 | -19.9  -3.8  355  25 13   8.5   4.6
 13500 -19.8  -3.6  005  26 14   8.2   4.5 | -18.6  -1.5  355  25 13   8.4   4.6
 13000 -18.6  -1.5  005  27 14   8.2   4.5 | -17.3   0.9  355  24 12   8.0   4.4
 12500 -17.4   0.7  005  27 14   8.1   4.4 | -16.2   2.8  355  23 12   7.8   4.3
 12000 -16.1   3.0  005  27 14   8.5   4.7 | -15.1   4.8  355  22 11   7.0   3.8
 11750 -15.5   4.1  005  27 14   7.6   4.1 | -14.6   5.7  350  22 11   6.9   3.8
 11500 -15.0   5.0  005  27 14   7.6   4.2 | -14.1   6.6  350  22 11   7.0   3.9
 11250 -14.4   6.1  005  27 14   7.6   4.2 | -13.6   7.5  350  22 11   7.0   3.8
 11000 -13.9   7.0  005  27 14   7.2   4.0 | -13.1   8.4  350  22 11   6.4   3.5
 10750 -13.3   8.1  005  27 14   7.0   3.8 | -12.7   9.1  350  22 11   5.3   2.9
 10500 -12.8   9.0  005  27 14   7.1   3.9 | -12.3   9.9  350  23 12   4.9   2.7
 10250 -12.3   9.9  360  28 14   6.8   3.8 | -11.9  10.6  350  23 12   5.3   2.9
 10000 -11.8  10.8  360  29 15   5.9   3.2 | -11.5  11.3  355  24 12   5.9   3.2
  9750 -11.4  11.5  360  30 16   7.0   3.8 | -11.1  12.0  355  25 13   5.3   2.9
  9500 -10.8  12.6  360  31 16   8.3   4.6 | -10.8  12.6  355  26 13   4.5   2.5
  9250 -10.2  13.6  360  32 16   7.7   4.2 | -10.4  13.3  360  26 14   6.2   3.4
  9000  -9.6  14.7  360  31 16   7.1   3.9 |  -9.9  14.2  355  26 14   6.9   3.8
  8750  -9.1  15.6  355  30 15   8.1   4.4 |  -9.4  15.1  355  26 14   7.8   4.3
  8500  -8.4  16.9  355  29 15   8.0   4.4 |  -8.7  16.3  355  26 13   9.3   5.1
  8250  -7.9  17.8  350  28 14   5.7   3.1 |  -8.0  17.6  350  24 13   9.2   5.0
  8000  -7.6  18.3  345  26 13   3.9   2.1 |  -7.3  18.9  350  23 12   8.8   4.8
  7750  -7.2  19.0  340  25 13   7.3   4.0 |  -6.7  19.9  345  21 11  10.1   5.6
  7500  -6.7  19.9  335  23 12   0.3   0.2 |  -5.9  21.4  345  20 10   7.4   4.1
  7250  -7.2  19.0  335  19 10  -9.8  -5.4 |  -5.6  21.9  345  17  9   3.4   1.9
  7000  -7.8  18.0  330  15  8  -1.9  -1.0 |  -5.3  22.5  340  15  8   6.6   3.6
  6750     M     M    M   M  M     M     M |     M     M    M   M  M     M     M

           02/05/2016 at 1400 MST          |       02/05/2016 at 1700 MST
                                           |
K index... -9.1  LI... +279.1              | K index... -4.5  LI... +278.4
CAPE... 0.0  CIN... -1.2                   | CAPE... 0.0  CIN... -0.4
                                           |
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 -54.4 -65.9  295  20 10   0.7   0.4 | -54.6 -66.3  300  21 11   0.3   0.2
 45000 -53.3 -63.9  310  26 13   0.7   0.4 | -54.1 -65.4  315  24 12   0.3   0.2
 40000 -51.0 -59.8  335  31 16   1.6   0.9 | -53.7 -64.7  340  45 23   0.2   0.1
 38000 -50.5 -58.9  345  36 18  -2.2  -1.2 | -53.7 -64.7  350  54 28  -0.7  -0.4
 36000 -51.7 -61.1  355  46 23  -2.0  -1.1 | -54.1 -65.4  360  64 33  -0.7  -0.4
 34000 -52.9 -63.2  360  56 29  -2.1  -1.1 | -54.5 -66.1  010  76 39  -1.1  -0.6
 32000 -52.2 -62.0  005  59 31   2.0   1.1 | -52.2 -62.0  010  75 38   4.0   2.2
 30000 -50.9 -59.6  010  60 31   2.9   1.6 | -49.8 -57.6  005  72 37   4.8   2.6
 29000 -49.3 -56.7  010  61 31   5.5   3.0 | -48.2 -54.8  005  72 37   5.4   3.0
 28000 -47.7 -53.9  010  62 32   5.5   3.0 | -46.6 -51.9  005  72 37   5.4   3.0
 27000 -46.1 -51.0  010  63 32   5.5   3.0 | -45.0 -49.0  005  71 37   5.3   2.9
 26000 -44.1 -47.4  010  61 32   7.3   4.0 | -42.9 -45.2  005  69 35   7.8   4.3
 25000 -41.9 -43.4  015  59 30   7.3   4.0 | -40.6 -41.1  005  65 33   7.8   4.3
 24000 -39.7 -39.5  015  56 29   7.4   4.0 | -38.2 -36.8  005  61 32   7.8   4.3
 23000 -37.4 -35.3  015  53 27   8.3   4.5 | -35.8 -32.4  005  58 30   8.2   4.5
 22000 -34.9 -30.8  015  51 26   8.3   4.6 | -33.3 -27.9  005  54 28   8.2   4.5
 21000 -32.4 -26.3  015  49 25   8.4   4.6 | -30.9 -23.6  005  51 26   8.1   4.5
 20000 -30.1 -22.2  015  46 24   7.2   3.9 | -28.6 -19.5  005  48 24   7.3   4.0
 19500 -29.1 -20.4  010  44 23   7.2   4.0 | -27.5 -17.5  005  46 24   7.3   4.0
 19000 -28.0 -18.4  010  42 22   7.2   4.0 | -26.4 -15.5  005  45 23   7.3   4.0
 18500 -26.9 -16.4  005  41 21   7.3   4.0 | -25.3 -13.5  005  43 22   7.4   4.0
 18000 -26.0 -14.8  005  39 20   5.2   2.8 | -24.2 -11.6  005  41 21   7.9   4.4
 17500 -25.2 -13.4  360  36 19   5.3   2.9 | -23.0  -9.4  005  40 20   8.0   4.4
 17000 -24.4 -11.9  360  34 17   5.7   3.2 | -21.9  -7.4  005  38 20   6.9   3.8
 16500 -23.5 -10.3  355  32 17   5.9   3.2 | -20.8  -5.4  005  37 19   6.7   3.7
 16000 -22.6  -8.7  355  31 16   5.8   3.2 | -19.8  -3.6  005  35 18   5.7   3.1
 15500 -21.7  -7.1  350  30 15   5.8   3.2 | -18.8  -1.8  360  33 17   4.7   2.6
 15000 -20.4  -4.7  350  29 15   5.6   3.1 | -18.1  -0.6  360  32 16   3.5   1.9
 14500 -19.6  -3.3  350  28 14   5.5   3.0 | -17.6   0.3  355  30 16   3.4   1.8
 14000 -18.7  -1.7  345  27 14   6.5   3.5 | -17.1   1.2  350  29 15   4.3   2.4
 13500 -17.7   0.1  345  26 13   6.8   3.8 | -16.4   2.5  345  26 14   4.6   2.6
 13000 -16.7   1.9  340  24 13   7.2   3.9 | -15.6   3.9  340  24 13   6.3   3.5
 12500 -15.6   3.9  335  24 12   7.3   4.0 | -14.6   5.7  330  22 12   7.0   3.8
 12000 -14.5   5.9  335  23 12   7.5   4.1 | -13.5   7.7  320  21 11   8.5   4.7
 11750 -13.9   7.0  330  23 12   7.5   4.1 | -12.9   8.8  320  21 11   9.0   4.9
 11500 -13.4   7.9  330  22 11   7.5   4.1 | -12.2  10.0  315  21 11   8.9   4.9
 11250 -12.8   9.0  330  22 11   7.5   4.1 | -11.6  11.1  310  21 11   8.9   4.9
 11000 -12.3   9.9  330  22 11   6.8   3.7 | -10.9  12.4  310  21 11   8.5   4.7
 10750 -11.8  10.8  330  21 11   5.4   3.0 | -10.3  13.5  310  20 10   8.0   4.4
 10500 -11.5  11.3  330  21 11   5.0   2.7 |  -9.7  14.5  305  19 10   8.1   4.5
 10250 -11.1  12.0  330  21 11   5.0   2.8 |  -9.2  15.4  305  18  9   7.5   4.1
 10000 -10.7  12.7  330  20 10   5.0   2.7 |  -8.6  16.5  305  17  9   6.6   3.6
  9750 -10.4  13.3  335  20 10   4.9   2.7 |  -8.1  17.4  305  16  8   6.7   3.7
  9500 -10.1  13.8  335  19 10   4.6   2.5 |  -7.6  18.3  300  15  8   6.8   3.7
  9250  -9.7  14.5  340  18  9   6.2   3.4 |  -7.2  19.0  300  14  7   5.7   3.1
  9000  -9.2  15.4  340  17  9   6.8   3.7 |  -6.8  19.8  300  13  7   4.4   2.4
  8750  -8.7  16.3  345  17  9   8.2   4.5 |  -6.4  20.5  300  12  6   5.8   3.2
  8500  -8.0  17.6  345  15  8  10.1   5.6 |  -6.0  21.2  300  10  5   6.1   3.3
  8250  -7.3  18.9  345  14  7   9.7   5.3 |  -5.6  21.9  300   9  5   4.6   2.5
  8000  -6.5  20.3  345  13  7   9.8   5.4 |  -5.3  22.5  300   7  4   4.3   2.4
  7750  -5.8  21.6  345  12  6   9.4   5.2 |  -5.0  23.0  300   6  3   4.2   2.3
  7500  -5.2  22.6  345  12  6   6.9   3.8 |  -4.8  23.4  300   4  2  -2.3  -1.3
  7250  -4.8  23.4  345  11  6   5.1   2.8 |  -5.3  22.5  295   4  2  -7.8  -4.3
  7000  -4.4  24.1  345  10  5   6.4   3.5 |  -5.8  21.6  290   3  1  -3.6  -2.0
  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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