Chemical Downwind Message for KEDW

This product is derived from 29 OCT 2025 18Z NAM model data.

DD/HH  DDD FFF A TT H W C
29/18  211 009 5 25 1 - 0
29/20  227 014 5 28 1 - 0
29/22  226 011 4 30 1 - 0
30/00  210 009 4 28 1 - 0
30/02  200 009 4 24 1 - 0
30/04  194 007 4 19 2 - 0
30/06  199 007 4 15 3 - 0
30/08  193 007 4 12 3 - 0
30/10  198 007 5 11 4 - 0
30/12  216 005 5 10 4 - 0
30/14  228 005 5 09 4 - 0
30/16  219 003 6 13 3 - 0
30/18  198 005 6 21 2 - 0
30/20  220 005 7 27 1 - 0
30/22  180 001 7 29 1 - 0
31/00  067 005 7 28 1 - 0
31/02  060 009 7 23 1 - 0
31/04  061 007 7 19 2 - 0
31/06  060 007 7 15 4 - 0
31/08  062 005 7 12 5 - 0
31/10  054 005 7 11 6 - 0
31/12  045 003 7 10 6 - 0
31/14  063 001 7 09 6 - 0
31/16  211 003 7 12 5 - 0
31/18  196 001 6 20 3 - 0
31/20  110 003 6 26 1 - 0
31/22  090 005 5 28 1 - 0
01/00  063 005 5 27 1 - 0
01/02  056 011 5 21 2 - 0
01/04  061 009 5 16 4 - 0
01/06  057 005 5 13 5 - 0
01/08  095 003 6 12 6 - 0
01/10  164 001 6 11 6 - 0
01/12  217 003 6 10 6 - 0
01/14  222 005 7 09 7 - 0
01/16  236 003 7 13 5 - 0
01/18  209 003 7 20 3 - 0
01/20  211 003 7 26 2 - 0
01/22  214 001 7 28 1 - 0
02/00  090 001 7 27 1 - 0
02/02  085 007 7 22 2 - 0
02/04  082 007 7 18 2 - 0
02/06  090 003 7 16 3 - 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.