Chemical Downwind Message for KEDW

This product is derived from 13 OCT 2026 18Z NAM model data.

DD/HH  DDD FFF A TT H W C
13/18  219 014 7 16 3 - 0
13/20  220 018 7 18 3 - 0
13/22  204 014 7 19 2 - 0
14/00  204 014 7 19 1 - 0
14/02  183 007 7 16 2 - 0
14/04  131 007 7 13 2 - 0
14/06  141 007 7 09 3 - 0
14/08  153 005 7 07 3 - 0
14/10  176 005 7 06 3 - 0
14/12  189 001 7 06 4 - 0
14/14  150 003 7 05 4 - 0
14/16  203 001 7 10 3 - 0
14/18  232 005 7 18 1 - 0
14/20  227 007 7 22 1 - 0
14/22  215 003 7 24 1 - 0
15/00  090 001 7 24 1 - 0
15/02  049 007 7 20 1 - 0
15/04  081 009 7 15 2 - 0
15/06  111 005 7 11 3 - 0
15/08  129 003 7 09 4 - 0
15/10  180 005 7 08 4 - 0
15/12  193 005 7 07 4 - 0
15/14  207 005 7 06 4 - 0
15/16  226 009 7 13 2 - 0
15/18  226 022 7 22 1 - 0
15/20  226 031 7 26 1 - 0
15/22  221 033 7 27 1 - 0
16/00  222 031 7 26 1 - 0
16/02  226 016 6 20 2 - 0
16/04  214 014 6 17 3 - 0
16/06  211 016 6 15 3 - 0
16/08  218 020 7 14 4 - 0
16/10  220 018 7 13 4 - 0
16/12  217 018 7 12 5 - 0
16/14  217 018 7 11 5 - 0
16/16  223 027 7 16 3 - 0
16/18  229 035 7 21 2 - 0
16/20  236 037 7 25 2 - 0
16/22  241 035 7 26 2 - 0
17/00  241 029 7 26 2 - 0
17/02  235 014 7 21 3 - 0
17/04  231 012 7 17 4 - 0
17/06  219 011 7 15 5 - 0

Legend:

DD/HH  DDD FFF A TT H W C

DD   Valid Time Forecast Day (UTC)
HH   Valid Time Forecast Hour (UTC)
DDD  Surface Wind Direction (to a point, not from; e.g. 090 means towards the east
FFF  Wind Speed (km/hr)
A    Air Stability Code (from Lifted Index)
      LI   <= -1.5       A = 1
     -1.5  <  LI <  1.5  A = 2
      1.5  <= LI <  4.5  A = 3
      4.5  <= LI <  7.5  A = 4
      7.5  <= LI < 10.5  A = 5
     10.5  <= LI < 13.5  A = 6
     13.5  <= LI         A = 7
TT   Air Temperature Code (deg C) (temperatures greater than 50 are encoded as 50,
     temperatures less than -49 are encoded as 99, temperatures less than 0 are
     encoded by adding 50 to the absolute value of the temperature.
H    Relative Humidity Code (encoded with the 10s digit of the value where 100% = 9
     for example, 19% is 1, 56% is 5, 6% is 0
W    Significant Weather Code (Fog or BR is 4, Rain and Freezing Rain is 6,
     Mixed/Ice and Snow is 7, TRW or Svr TRW is 9, no precip is '-'.
     ***Note*** Code 9 is not evaluated in this output.
C    Total Cloud Cover is evaluated on a column directly above the model grid point
     and does not account for a horizon to horizon view.  If any of low, mid or hi cloud
     cover is evaluated as greater than 50%, cloud cover is encoded 2, otherwise
     it is encoded as 0.