COLUMBIA GORGE GRADIENT FORECASTS
WEATHER NORTHWEST
WEATHER OPERATIONS CENTER
900 AM PDT WED JUN 18 2025
Data from 12Z Wed 18 Jun 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
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12Z Wed 18 Jun 1013.2 1016.3 1017.6 1018.4 +5.2 +4.4 +1.3
13Z Wed 18 Jun 1012.7 1015.7 1016.8 1017.7 +5.0 +4.1 +1.1
14Z Wed 18 Jun 1013.2 1016.0 1017.3 1018.2 +5.0 +4.1 +1.3
15Z Wed 18 Jun 1012.5 1015.4 1017.0 1017.9 +5.4 +4.5 +1.6
16Z Wed 18 Jun 1012.8 1015.8 1017.5 1018.6 +5.8 +4.7 +1.7
17Z Wed 18 Jun 1012.7 1015.6 1017.5 1019.1 +6.4 +4.8 +1.9
18Z Wed 18 Jun 1012.3 1015.5 1017.2 1019.8 +7.5 +4.9 +1.7
19Z Wed 18 Jun 1012.3 1016.0 1017.6 1020.3 +8.0 +5.3 +1.6
20Z Wed 18 Jun 1012.1 1016.0 1018.0 1020.4 +8.3 +5.9 +2.0
21Z Wed 18 Jun 1012.2 1016.0 1018.6 1020.4 +8.2 +6.4 +2.6
22Z Wed 18 Jun 1012.3 1015.9 1018.5 1020.4 +8.1 +6.2 +2.6
23Z Wed 18 Jun 1012.0 1015.6 1017.7 1019.9 +7.9 +5.7 +2.1
00Z Thu 19 Jun 1012.5 1016.0 1018.0 1020.0 +7.5 +5.5 +2.0
01Z Thu 19 Jun 1012.7 1016.1 1018.2 1020.0 +7.3 +5.5 +2.1
02Z Thu 19 Jun 1013.2 1016.3 1018.5 1019.9 +6.7 +5.3 +2.2
03Z Thu 19 Jun 1013.4 1016.3 1018.5 1019.8 +6.4 +5.1 +2.2
04Z Thu 19 Jun 1013.5 1016.2 1018.4 1019.7 +6.2 +4.9 +2.2
05Z Thu 19 Jun 1014.3 1016.7 1018.9 1019.8 +5.5 +4.6 +2.2
06Z Thu 19 Jun 1014.6 1016.8 1019.0 1019.7 +5.1 +4.4 +2.2
07Z Thu 19 Jun 1014.9 1016.9 1018.8 1019.4 +4.5 +3.9 +1.9
08Z Thu 19 Jun 1014.8 1016.6 1018.3 1018.8 +4.0 +3.5 +1.7
09Z Thu 19 Jun 1015.2 1016.8 1018.3 1018.7 +3.5 +3.1 +1.5
10Z Thu 19 Jun 1015.6 1017.0 1018.6 1018.9 +3.3 +3.0 +1.6
11Z Thu 19 Jun 1015.6 1016.9 1018.4 1018.7 +3.1 +2.8 +1.5
12Z Thu 19 Jun 1015.7 1016.8 1018.4 1018.5 +2.8 +2.7 +1.6
13Z Thu 19 Jun 1015.7 1016.7 1018.1 1018.1 +2.4 +2.4 +1.4
14Z Thu 19 Jun 1015.8 1016.8 1018.3 1018.5 +2.7 +2.5 +1.5
15Z Thu 19 Jun 1015.3 1016.2 1018.1 1018.2 +2.9 +2.8 +1.9
16Z Thu 19 Jun 1014.5 1015.4 1017.4 1017.6 +3.1 +2.9 +2.0
17Z Thu 19 Jun 1013.8 1014.6 1016.9 1017.3 +3.5 +3.1 +2.3
18Z Thu 19 Jun 1012.9 1013.7 1016.2 1016.9 +4.0 +3.3 +2.5
19Z Thu 19 Jun 1011.9 1013.1 1015.8 1016.8 +4.9 +3.9 +2.7
20Z Thu 19 Jun 1010.9 1012.5 1015.2 1016.7 +5.8 +4.3 +2.7
21Z Thu 19 Jun 1010.2 1012.2 1014.9 1016.8 +6.6 +4.7 +2.7
22Z Thu 19 Jun 1009.4 1011.7 1014.6 1017.0 +7.6 +5.2 +2.9
23Z Thu 19 Jun 1008.3 1011.0 1014.0 1016.7 +8.4 +5.7 +3.0
00Z Fri 20 Jun 1008.0 1010.7 1013.9 1016.9 +8.9 +5.9 +3.2
01Z Fri 20 Jun 1007.8 1010.6 1014.0 1016.7 +8.9 +6.2 +3.4
02Z Fri 20 Jun 1007.7 1010.8 1014.1 1016.6 +8.9 +6.4 +3.3
03Z Fri 20 Jun 1007.1 1010.6 1014.0 1016.3 +9.2 +6.9 +3.4
04Z Fri 20 Jun 1006.6 1010.4 1013.8 1016.2 +9.6 +7.2 +3.4
05Z Fri 20 Jun 1006.7 1011.1 1014.2 1016.4 +9.7 +7.5 +3.1
06Z Fri 20 Jun 1006.8 1011.1 1014.2 1016.2 +9.4 +7.4 +3.1
Time Day Date YKM DLS PDX ONP YKM-ONP YKM-PDX DLS-PDX
(GMT) Pressure Pressure Pressure Pressure Gradient Gradient Gradient
============== ======== ======== ======== ======== ======== ======== ========
07Z Fri 20 Jun 1007.0 1011.4 1014.2 1016.1 +9.1 +7.2 +2.8
08Z Fri 20 Jun 1006.9 1011.2 1013.9 1015.6 +8.7 +7.0 +2.7
09Z Fri 20 Jun 1007.2 1011.3 1014.0 1015.4 +8.2 +6.8 +2.7
10Z Fri 20 Jun 1007.4 1011.3 1014.0 1015.4 +8.0 +6.6 +2.7
11Z Fri 20 Jun 1007.4 1011.4 1013.9 1015.0 +7.6 +6.5 +2.5
12Z Fri 20 Jun 1007.7 1011.7 1013.7 1014.9 +7.2 +6.0 +2.0
13Z Fri 20 Jun 1007.9 1011.9 1013.6 1014.7 +6.8 +5.7 +1.7
14Z Fri 20 Jun 1007.9 1012.2 1013.9 1014.8 +6.9 +6.0 +1.7
15Z Fri 20 Jun 1007.5 1011.7 1013.5 1014.5 +7.0 +6.0 +1.8
16Z Fri 20 Jun 1007.2 1011.3 1013.2 1014.2 +7.0 +6.0 +1.9
17Z Fri 20 Jun 1007.4 1011.2 1013.3 1014.3 +6.9 +5.9 +2.1
18Z Fri 20 Jun 1007.2 1011.2 1013.3 1014.4 +7.2 +6.1 +2.1
19Z Fri 20 Jun 1006.9 1011.2 1013.4 1014.5 +7.6 +6.5 +2.2
20Z Fri 20 Jun 1006.6 1011.0 1013.3 1014.4 +7.8 +6.7 +2.3
21Z Fri 20 Jun 1006.8 1011.3 1013.5 1014.8 +8.0 +6.7 +2.2
22Z Fri 20 Jun 1007.0 1011.9 1013.8 1015.1 +8.1 +6.8 +1.9
23Z Fri 20 Jun 1007.0 1012.3 1013.7 1015.1 +8.1 +6.7 +1.4
00Z Sat 21 Jun 1007.4 1012.6 1014.0 1015.5 +8.1 +6.6 +1.4
01Z Sat 21 Jun 1007.9 1012.5 1014.3 1015.7 +7.8 +6.4 +1.8
02Z Sat 21 Jun 1008.2 1012.6 1014.5 1015.9 +7.7 +6.3 +1.9
03Z Sat 21 Jun 1008.3 1012.7 1014.5 1016.2 +7.9 +6.2 +1.8
04Z Sat 21 Jun 1008.6 1013.0 1014.6 1016.4 +7.8 +6.0 +1.6
05Z Sat 21 Jun 1009.4 1013.6 1015.5 1017.2 +7.8 +6.1 +1.9
06Z Sat 21 Jun 1009.7 1013.7 1016.1 1017.5 +7.8 +6.4 +2.4
07Z Sat 21 Jun 1010.1 1013.8 1016.5 1018.0 +7.9 +6.4 +2.7
08Z Sat 21 Jun 1010.0 1013.8 1016.5 1018.1 +8.1 +6.5 +2.7
09Z Sat 21 Jun 1010.3 1014.4 1016.7 1018.5 +8.2 +6.4 +2.3
10Z Sat 21 Jun 1010.5 1014.6 1016.9 1018.9 +8.4 +6.4 +2.3
11Z Sat 21 Jun 1010.8 1014.8 1017.0 1019.1 +8.3 +6.2 +2.2
12Z Sat 21 Jun 1011.1 1015.2 1017.2 1019.4 +8.3 +6.1 +2.0
13Z Sat 21 Jun 1011.2 1015.1 1017.0 1019.3 +8.1 +5.8 +1.9
14Z Sat 21 Jun 1011.9 1015.1 1017.1 1019.5 +7.6 +5.2 +2.0
15Z Sat 21 Jun 1011.8 1014.6 1016.7 1019.4 +7.6 +4.9 +2.1
16Z Sat 21 Jun 1011.7 1014.5 1016.6 1019.6 +7.9 +4.9 +2.1
17Z Sat 21 Jun 1011.6 1014.9 1017.0 1020.0 +8.4 +5.4 +2.1
18Z Sat 21 Jun 1011.2 1014.9 1017.0 1020.3 +9.1 +5.8 +2.1
19Z Sat 21 Jun 1010.9 1014.8 1017.1 1020.5 +9.6 +6.2 +2.3
20Z Sat 21 Jun 1011.8 1014.7 1017.3 1020.5 +8.7 +5.5 +2.6
21Z Sat 21 Jun 1012.8 1015.6 1017.6 1020.8 +8.0 +4.8 +2.0
22Z Sat 21 Jun 1013.0 1016.1 1017.9 1021.1 +8.1 +4.9 +1.8
23Z Sat 21 Jun 1013.0 1016.3 1017.9 1020.9 +7.9 +4.9 +1.6
00Z Sun 22 Jun 1013.6 1016.4 1018.2 1021.2 +7.6 +4.6 +1.8
$$