COLUMBIA GORGE GRADIENT FORECASTS
WEATHER NORTHWEST
WEATHER OPERATIONS CENTER
300 PM PDT THU APR 3 2025
Data from 18Z Thu 03 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 Thu 03 Apr 1018.3 1020.4 1022.0 1021.1 +2.8 +3.7 +1.6
19Z Thu 03 Apr 1018.3 1020.1 1021.8 1021.0 +2.7 +3.5 +1.7
20Z Thu 03 Apr 1017.6 1019.1 1020.9 1020.9 +3.3 +3.3 +1.8
21Z Thu 03 Apr 1017.7 1018.9 1020.5 1020.6 +2.9 +2.8 +1.6
22Z Thu 03 Apr 1017.4 1018.6 1020.3 1020.4 +3.0 +2.9 +1.7
23Z Thu 03 Apr 1017.8 1018.9 1020.3 1020.3 +2.5 +2.5 +1.4
00Z Fri 04 Apr 1018.0 1018.9 1020.3 1020.5 +2.5 +2.3 +1.4
01Z Fri 04 Apr 1018.7 1019.5 1020.9 1021.3 +2.6 +2.2 +1.4
02Z Fri 04 Apr 1019.9 1020.6 1021.5 1021.6 +1.7 +1.6 +0.9
03Z Fri 04 Apr 1020.6 1021.2 1021.6 1021.7 +1.1 +1.0 +0.4
04Z Fri 04 Apr 1021.3 1021.5 1021.8 1022.4 +1.1 +0.5 +0.3
05Z Fri 04 Apr 1022.4 1022.3 1022.7 1023.5 +1.1 +0.3 +0.4
06Z Fri 04 Apr 1023.5 1023.3 1023.7 1024.2 +0.7 +0.2 +0.4
07Z Fri 04 Apr 1024.3 1024.0 1024.4 1024.3 +0.0 +0.1 +0.4
08Z Fri 04 Apr 1025.1 1024.9 1024.8 1024.4 -0.7 -0.3 -0.1
09Z Fri 04 Apr 1026.2 1025.7 1025.2 1024.5 -1.7 -1.0 -0.5
10Z Fri 04 Apr 1027.1 1026.5 1025.8 1025.0 -2.1 -1.3 -0.7
11Z Fri 04 Apr 1027.6 1026.9 1025.7 1024.8 -2.8 -1.9 -1.2
12Z Fri 04 Apr 1028.4 1027.3 1025.8 1024.8 -3.6 -2.6 -1.5
13Z Fri 04 Apr 1029.0 1027.8 1026.1 1024.8 -4.2 -2.9 -1.7
14Z Fri 04 Apr 1030.0 1028.9 1026.9 1025.3 -4.7 -3.1 -2.0
15Z Fri 04 Apr 1029.9 1029.2 1027.1 1025.5 -4.4 -2.8 -2.1
16Z Fri 04 Apr 1029.2 1028.9 1026.9 1025.4 -3.8 -2.3 -2.0
17Z Fri 04 Apr 1029.2 1028.8 1027.0 1025.4 -3.8 -2.2 -1.8
18Z Fri 04 Apr 1029.0 1028.5 1026.7 1025.0 -4.0 -2.3 -1.8
19Z Fri 04 Apr 1028.8 1028.2 1026.3 1024.7 -4.1 -2.5 -1.9
20Z Fri 04 Apr 1028.2 1027.5 1025.6 1024.1 -4.1 -2.6 -1.9
21Z Fri 04 Apr 1028.0 1027.3 1025.3 1023.7 -4.3 -2.7 -2.0
22Z Fri 04 Apr 1027.7 1027.1 1024.9 1023.3 -4.4 -2.8 -2.2
23Z Fri 04 Apr 1027.2 1026.6 1024.3 1022.8 -4.4 -2.9 -2.3
00Z Sat 05 Apr 1027.1 1026.6 1024.2 1022.7 -4.4 -2.9 -2.4
01Z Sat 05 Apr 1027.1 1026.6 1024.0 1022.8 -4.3 -3.1 -2.6
02Z Sat 05 Apr 1027.4 1027.0 1024.2 1023.1 -4.3 -3.2 -2.8
03Z Sat 05 Apr 1027.4 1027.2 1024.4 1023.1 -4.3 -3.0 -2.8
04Z Sat 05 Apr 1027.7 1027.7 1024.6 1023.0 -4.7 -3.1 -3.1
05Z Sat 05 Apr 1028.3 1028.2 1024.9 1023.1 -5.2 -3.4 -3.3
06Z Sat 05 Apr 1028.4 1028.3 1024.7 1022.7 -5.7 -3.7 -3.6
Time Day Date YKM DLS PDX ONP YKM-ONP YKM-PDX DLS-PDX
(GMT) Pressure Pressure Pressure Pressure Gradient Gradient Gradient
============== ======== ======== ======== ======== ======== ======== ========
07Z Sat 05 Apr 1028.8 1028.5 1024.6 1022.7 -6.1 -4.2 -3.9
08Z Sat 05 Apr 1028.9 1028.5 1024.5 1022.8 -6.1 -4.4 -4.0
09Z Sat 05 Apr 1029.2 1028.6 1024.5 1022.9 -6.3 -4.7 -4.1
10Z Sat 05 Apr 1029.5 1028.8 1024.8 1023.3 -6.2 -4.7 -4.0
11Z Sat 05 Apr 1029.2 1028.6 1024.6 1023.1 -6.1 -4.6 -4.0
12Z Sat 05 Apr 1029.2 1028.6 1024.3 1023.4 -5.8 -4.9 -4.3
13Z Sat 05 Apr 1029.2 1028.6 1024.5 1024.1 -5.1 -4.7 -4.1
14Z Sat 05 Apr 1029.7 1029.4 1025.3 1024.7 -5.0 -4.4 -4.1
15Z Sat 05 Apr 1029.3 1029.2 1025.4 1024.9 -4.4 -3.9 -3.8
16Z Sat 05 Apr 1028.4 1028.5 1025.4 1024.7 -3.7 -3.0 -3.1
17Z Sat 05 Apr 1028.3 1028.2 1025.7 1024.6 -3.7 -2.6 -2.5
18Z Sat 05 Apr 1027.9 1027.7 1025.5 1024.6 -3.3 -2.4 -2.2
19Z Sat 05 Apr 1027.4 1027.0 1025.1 1024.7 -2.7 -2.3 -1.9
20Z Sat 05 Apr 1026.2 1026.0 1024.3 1024.1 -2.1 -1.9 -1.7
21Z Sat 05 Apr 1025.7 1025.6 1024.1 1024.3 -1.4 -1.6 -1.5
22Z Sat 05 Apr 1025.6 1025.2 1024.1 1024.5 -1.1 -1.5 -1.1
23Z Sat 05 Apr 1024.7 1024.4 1023.6 1024.0 -0.7 -1.1 -0.8
00Z Sun 06 Apr 1024.3 1024.0 1023.2 1023.9 -0.4 -1.1 -0.8
01Z Sun 06 Apr 1023.9 1023.7 1023.1 1023.8 -0.1 -0.8 -0.6
02Z Sun 06 Apr 1023.9 1023.7 1023.1 1023.7 -0.2 -0.8 -0.6
03Z Sun 06 Apr 1023.9 1023.6 1022.8 1023.5 -0.4 -1.1 -0.8
04Z Sun 06 Apr 1023.9 1023.6 1022.7 1023.4 -0.5 -1.2 -0.9
05Z Sun 06 Apr 1023.9 1023.7 1022.6 1023.4 -0.5 -1.3 -1.1
06Z Sun 06 Apr 1023.5 1023.3 1022.2 1023.0 -0.5 -1.3 -1.1
07Z Sun 06 Apr 1023.3 1023.2 1022.0 1022.6 -0.7 -1.3 -1.2
08Z Sun 06 Apr 1023.0 1022.9 1021.6 1022.4 -0.6 -1.4 -1.3
09Z Sun 06 Apr 1023.2 1022.9 1021.7 1022.2 -1.0 -1.5 -1.2
10Z Sun 06 Apr 1023.2 1023.0 1021.8 1022.2 -1.0 -1.4 -1.2
11Z Sun 06 Apr 1022.7 1022.4 1021.3 1021.3 -1.4 -1.4 -1.1
12Z Sun 06 Apr 1022.3 1022.0 1020.6 1020.4 -1.9 -1.7 -1.4
13Z Sun 06 Apr 1021.9 1021.4 1019.9 1020.1 -1.8 -2.0 -1.5
14Z Sun 06 Apr 1022.0 1021.3 1019.8 1020.3 -1.7 -2.2 -1.5
15Z Sun 06 Apr 1021.3 1020.8 1019.4 1019.9 -1.4 -1.9 -1.4
16Z Sun 06 Apr 1020.0 1019.9 1018.9 1019.4 -0.6 -1.1 -1.0
17Z Sun 06 Apr 1019.6 1019.2 1019.3 1019.2 -0.4 -0.3 +0.1
18Z Sun 06 Apr 1018.7 1018.4 1019.7 1019.0 +0.3 +1.0 +1.3
19Z Sun 06 Apr 1018.0 1017.4 1019.7 1018.7 +0.7 +1.7 +2.3
20Z Sun 06 Apr 1016.6 1016.2 1018.9 1017.9 +1.3 +2.3 +2.7
21Z Sun 06 Apr 1015.7 1015.6 1018.5 1017.5 +1.8 +2.8 +2.9
22Z Sun 06 Apr 1014.6 1015.6 1018.5 1017.2 +2.6 +3.9 +2.9
23Z Sun 06 Apr 1013.3 1014.8 1017.2 1016.4 +3.1 +3.9 +2.4
00Z Mon 07 Apr 1012.6 1014.9 1016.4 1016.1 +3.5 +3.8 +1.5
01Z Mon 07 Apr 1011.8 1015.3 1015.5 1015.7 +3.9 +3.7 +0.2
02Z Mon 07 Apr 1011.8 1015.3 1015.1 1015.7 +3.9 +3.3 -0.2
03Z Mon 07 Apr 1012.7 1014.8 1015.0 1015.8 +3.1 +2.3 +0.2
04Z Mon 07 Apr 1012.9 1014.4 1015.0 1015.8 +2.9 +2.1 +0.6
05Z Mon 07 Apr 1012.6 1014.4 1015.3 1016.4 +3.8 +2.7 +0.9
06Z Mon 07 Apr 1011.8 1014.2 1015.5 1016.9 +5.1 +3.7 +1.3
$$