COLUMBIA GORGE GRADIENT FORECASTS
WEATHER NORTHWEST
WEATHER OPERATIONS CENTER
300 PM PDT SAT APR 5 2025
Data from 18Z Sat 05 Apr NAM Model
Positive gradients are onshore or westerly,
negative gradients are offshore or easterly.
Time Day Date YKM DLS PDX ONP YKM-ONP YKM-PDX DLS-PDX
(GMT) Pressure Pressure Pressure Pressure Gradient Gradient Gradient
============== ======== ======== ======== ======== ======== ======== ========
18Z Sat 05 Apr 1029.0 1028.8 1025.9 1025.7 -3.3 -3.1 -2.9
19Z Sat 05 Apr 1027.2 1027.1 1025.3 1025.3 -1.9 -1.9 -1.8
20Z Sat 05 Apr 1026.6 1026.4 1024.8 1024.7 -1.9 -1.8 -1.6
21Z Sat 05 Apr 1025.8 1025.7 1024.4 1024.8 -1.0 -1.4 -1.3
22Z Sat 05 Apr 1025.0 1024.7 1023.6 1024.2 -0.8 -1.4 -1.1
23Z Sat 05 Apr 1023.8 1023.9 1023.0 1024.2 +0.4 -0.8 -0.9
00Z Sun 06 Apr 1023.4 1023.5 1022.7 1023.9 +0.5 -0.7 -0.8
01Z Sun 06 Apr 1023.4 1023.5 1022.8 1024.1 +0.7 -0.6 -0.7
02Z Sun 06 Apr 1023.7 1023.8 1023.0 1024.1 +0.4 -0.7 -0.8
03Z Sun 06 Apr 1023.8 1023.9 1023.0 1023.8 +0.0 -0.8 -0.9
04Z Sun 06 Apr 1023.8 1023.8 1022.9 1023.8 +0.0 -0.9 -0.9
05Z Sun 06 Apr 1024.0 1024.0 1022.8 1023.6 -0.4 -1.2 -1.2
06Z Sun 06 Apr 1023.7 1023.6 1022.2 1022.8 -0.9 -1.5 -1.4
07Z Sun 06 Apr 1023.3 1023.2 1021.5 1022.0 -1.3 -1.8 -1.7
08Z Sun 06 Apr 1022.9 1022.6 1020.8 1021.8 -1.1 -2.1 -1.8
09Z Sun 06 Apr 1023.0 1022.6 1020.7 1022.6 -0.4 -2.3 -1.9
10Z Sun 06 Apr 1023.5 1023.1 1021.3 1023.0 -0.5 -2.2 -1.8
11Z Sun 06 Apr 1023.3 1022.7 1021.2 1022.0 -1.3 -2.1 -1.5
12Z Sun 06 Apr 1023.1 1022.4 1021.8 1021.2 -1.9 -1.3 -0.6
13Z Sun 06 Apr 1022.7 1022.2 1022.1 1021.0 -1.7 -0.6 -0.1
14Z Sun 06 Apr 1023.0 1022.8 1022.5 1021.0 -2.0 -0.5 -0.3
15Z Sun 06 Apr 1022.4 1022.3 1022.1 1020.7 -1.7 -0.3 -0.2
16Z Sun 06 Apr 1021.2 1021.5 1021.0 1020.2 -1.0 -0.2 -0.5
17Z Sun 06 Apr 1020.6 1021.4 1020.2 1020.0 -0.6 -0.4 -1.2
18Z Sun 06 Apr 1020.0 1020.7 1019.9 1019.9 -0.1 -0.1 -0.8
19Z Sun 06 Apr 1019.2 1020.2 1019.8 1019.4 +0.2 +0.6 -0.4
20Z Sun 06 Apr 1018.3 1019.1 1019.7 1018.7 +0.4 +1.4 +0.6
21Z Sun 06 Apr 1017.3 1018.5 1019.3 1017.9 +0.6 +2.0 +0.8
22Z Sun 06 Apr 1016.7 1017.7 1018.2 1016.7 +0.0 +1.5 +0.5
23Z Sun 06 Apr 1015.6 1016.7 1017.0 1016.0 +0.4 +1.4 +0.3
00Z Mon 07 Apr 1014.9 1015.7 1016.4 1014.7 -0.2 +1.5 +0.7
01Z Mon 07 Apr 1014.0 1014.5 1015.1 1013.4 -0.6 +1.1 +0.6
02Z Mon 07 Apr 1012.9 1013.5 1014.1 1013.9 +1.0 +1.2 +0.6
03Z Mon 07 Apr 1011.2 1012.7 1012.7 1013.2 +2.0 +1.5 +0.0
04Z Mon 07 Apr 1010.2 1012.8 1012.6 1013.4 +3.2 +2.4 -0.2
05Z Mon 07 Apr 1010.0 1013.1 1012.7 1014.3 +4.3 +2.7 -0.4
06Z Mon 07 Apr 1011.3 1012.5 1013.0 1014.2 +2.9 +1.7 +0.5
Time Day Date YKM DLS PDX ONP YKM-ONP YKM-PDX DLS-PDX
(GMT) Pressure Pressure Pressure Pressure Gradient Gradient Gradient
============== ======== ======== ======== ======== ======== ======== ========
07Z Mon 07 Apr 1010.9 1012.6 1013.2 1014.4 +3.5 +2.3 +0.6
08Z Mon 07 Apr 1009.8 1012.6 1013.5 1014.5 +4.7 +3.7 +0.9
09Z Mon 07 Apr 1009.8 1013.0 1013.7 1014.2 +4.4 +3.9 +0.7
10Z Mon 07 Apr 1010.3 1013.4 1014.0 1014.3 +4.0 +3.7 +0.6
11Z Mon 07 Apr 1010.8 1013.6 1013.9 1014.2 +3.4 +3.1 +0.3
12Z Mon 07 Apr 1011.5 1014.1 1013.8 1014.4 +2.9 +2.3 -0.3
13Z Mon 07 Apr 1012.1 1014.4 1013.7 1014.1 +2.0 +1.6 -0.7
14Z Mon 07 Apr 1013.0 1014.9 1014.2 1014.2 +1.2 +1.2 -0.7
15Z Mon 07 Apr 1013.1 1014.7 1014.4 1014.1 +1.0 +1.3 -0.3
16Z Mon 07 Apr 1012.7 1014.1 1014.1 1013.5 +0.8 +1.4 +0.0
17Z Mon 07 Apr 1013.1 1014.4 1014.4 1014.1 +1.0 +1.3 +0.0
18Z Mon 07 Apr 1013.1 1014.5 1014.1 1013.9 +0.8 +1.0 -0.4
19Z Mon 07 Apr 1012.6 1014.1 1014.0 1013.9 +1.3 +1.4 -0.1
20Z Mon 07 Apr 1011.8 1013.3 1013.5 1013.7 +1.9 +1.7 +0.2
21Z Mon 07 Apr 1011.8 1013.9 1013.4 1013.9 +2.1 +1.6 -0.5
22Z Mon 07 Apr 1012.0 1013.9 1013.2 1014.3 +2.3 +1.2 -0.7
23Z Mon 07 Apr 1011.7 1013.2 1012.9 1015.0 +3.3 +1.2 -0.3
00Z Tue 08 Apr 1011.3 1013.0 1013.0 1015.9 +4.6 +1.7 +0.0
01Z Tue 08 Apr 1011.1 1013.2 1013.7 1016.2 +5.1 +2.6 +0.5
02Z Tue 08 Apr 1011.3 1013.5 1014.8 1016.4 +5.1 +3.5 +1.3
03Z Tue 08 Apr 1011.5 1014.1 1015.6 1016.6 +5.1 +4.1 +1.5
04Z Tue 08 Apr 1011.8 1014.8 1016.3 1016.8 +5.0 +4.5 +1.5
05Z Tue 08 Apr 1013.1 1016.0 1016.9 1017.1 +4.0 +3.8 +0.9
06Z Tue 08 Apr 1013.4 1016.5 1016.9 1017.0 +3.6 +3.5 +0.4
07Z Tue 08 Apr 1013.8 1016.9 1017.0 1017.0 +3.2 +3.2 +0.1
08Z Tue 08 Apr 1014.2 1017.0 1016.8 1016.7 +2.5 +2.6 -0.2
09Z Tue 08 Apr 1014.8 1017.3 1016.8 1016.7 +1.9 +2.0 -0.5
10Z Tue 08 Apr 1015.6 1017.9 1017.0 1016.9 +1.3 +1.4 -0.9
11Z Tue 08 Apr 1015.8 1018.1 1016.8 1016.7 +0.9 +1.0 -1.3
12Z Tue 08 Apr 1016.0 1018.4 1016.8 1016.7 +0.7 +0.8 -1.6
13Z Tue 08 Apr 1016.2 1018.6 1017.0 1016.6 +0.4 +0.8 -1.6
14Z Tue 08 Apr 1017.1 1019.0 1017.5 1016.9 -0.2 +0.4 -1.5
15Z Tue 08 Apr 1017.3 1019.2 1017.7 1016.9 -0.4 +0.4 -1.5
16Z Tue 08 Apr 1017.5 1019.3 1017.9 1016.8 -0.7 +0.4 -1.4
17Z Tue 08 Apr 1017.9 1019.6 1018.1 1017.4 -0.5 +0.2 -1.5
18Z Tue 08 Apr 1017.6 1019.1 1018.0 1017.6 +0.0 +0.4 -1.1
19Z Tue 08 Apr 1017.5 1018.8 1018.3 1018.2 +0.7 +0.8 -0.5
20Z Tue 08 Apr 1016.9 1018.4 1018.4 1018.7 +1.8 +1.5 +0.0
21Z Tue 08 Apr 1016.9 1018.3 1018.4 1019.5 +2.6 +1.5 +0.1
22Z Tue 08 Apr 1017.0 1018.7 1018.9 1020.3 +3.3 +1.9 +0.2
23Z Tue 08 Apr 1016.6 1018.9 1019.2 1020.9 +4.3 +2.6 +0.3
00Z Wed 09 Apr 1017.2 1018.9 1019.9 1021.5 +4.3 +2.7 +1.0
01Z Wed 09 Apr 1017.5 1019.4 1020.5 1022.2 +4.7 +3.0 +1.1
02Z Wed 09 Apr 1018.4 1020.3 1021.6 1022.8 +4.4 +3.2 +1.3
03Z Wed 09 Apr 1019.1 1021.5 1022.5 1023.5 +4.4 +3.4 +1.0
04Z Wed 09 Apr 1019.7 1022.5 1023.4 1023.7 +4.0 +3.7 +0.9
05Z Wed 09 Apr 1020.9 1023.7 1024.0 1024.3 +3.4 +3.1 +0.3
06Z Wed 09 Apr 1021.3 1024.2 1024.6 1024.7 +3.4 +3.3 +0.4
$$