NAM Gradient Forecasts

GRADIENT STACKING FORECASTS WEATHER NORTHWEST WEATHER OPERATIONS CENTER 300 PM PDT THU APR 3 2025 Data from 18Z Thu 03 Apr NAM Model Time Day Date ONP SLE RDM ONP-SLE SLE-RDM ONP-RDM (GMT) Pressure Pressure Pressure Gradient Gradient Gradient Remarks ============== ======== ======== ======== ======== ======== ======== ======= 18Z Thu 03 Apr 1021.1 1021.8 1019.5 -0.7 +2.3 +1.6 19Z Thu 03 Apr 1021.0 1021.4 1018.5 -0.4 +2.9 +2.5 20Z Thu 03 Apr 1020.9 1021.0 1017.7 -0.1 +3.3 +3.2 21Z Thu 03 Apr 1020.6 1020.4 1017.4 +0.2 +3.0 +3.2 GSE 22Z Thu 03 Apr 1020.4 1020.2 1017.0 +0.2 +3.2 +3.4 GSE 23Z Thu 03 Apr 1020.3 1020.1 1017.4 +0.2 +2.7 +2.9 GSE 00Z Fri 04 Apr 1020.5 1020.1 1017.2 +0.4 +2.9 +3.3 GSE 01Z Fri 04 Apr 1021.3 1020.8 1018.0 +0.5 +2.8 +3.3 GSE 02Z Fri 04 Apr 1021.6 1021.4 1019.0 +0.2 +2.4 +2.6 GSE 03Z Fri 04 Apr 1021.7 1021.6 1020.2 +0.1 +1.4 +1.5 GSE 04Z Fri 04 Apr 1022.4 1021.9 1021.1 +0.5 +0.8 +1.3 GSE 05Z Fri 04 Apr 1023.5 1022.8 1022.0 +0.7 +0.8 +1.5 GSE 06Z Fri 04 Apr 1024.2 1023.8 1022.8 +0.4 +1.0 +1.4 GSE 07Z Fri 04 Apr 1024.3 1024.4 1023.8 -0.1 +0.6 +0.5 08Z Fri 04 Apr 1024.4 1024.7 1025.0 -0.3 -0.3 -0.6 09Z Fri 04 Apr 1024.5 1025.1 1026.0 -0.6 -0.9 -1.5 10Z Fri 04 Apr 1025.0 1025.5 1026.9 -0.5 -1.4 -1.9 11Z Fri 04 Apr 1024.8 1025.3 1027.2 -0.5 -1.9 -2.4 12Z Fri 04 Apr 1024.8 1025.3 1027.6 -0.5 -2.3 -2.8 13Z Fri 04 Apr 1024.8 1025.8 1028.1 -1.0 -2.3 -3.3 14Z Fri 04 Apr 1025.3 1026.6 1028.8 -1.3 -2.2 -3.5 15Z Fri 04 Apr 1025.5 1026.7 1028.3 -1.2 -1.6 -2.8 16Z Fri 04 Apr 1025.4 1026.4 1027.2 -1.0 -0.8 -1.8 17Z Fri 04 Apr 1025.4 1026.4 1026.5 -1.0 -0.1 -1.1 18Z Fri 04 Apr 1025.0 1025.9 1025.9 -0.9 +0.0 -0.9 19Z Fri 04 Apr 1024.7 1025.5 1025.3 -0.8 +0.2 -0.6 20Z Fri 04 Apr 1024.1 1024.8 1024.6 -0.7 +0.2 -0.5 21Z Fri 04 Apr 1023.7 1024.5 1024.2 -0.8 +0.3 -0.5 22Z Fri 04 Apr 1023.3 1024.1 1023.6 -0.8 +0.5 -0.3 23Z Fri 04 Apr 1022.8 1023.5 1023.1 -0.7 +0.4 -0.3 00Z Sat 05 Apr 1022.7 1023.3 1023.1 -0.6 +0.2 -0.4 01Z Sat 05 Apr 1022.8 1023.0 1023.2 -0.2 -0.2 -0.4 02Z Sat 05 Apr 1023.1 1023.2 1023.5 -0.1 -0.3 -0.4 03Z Sat 05 Apr 1023.1 1023.3 1024.4 -0.2 -1.1 -1.3 04Z Sat 05 Apr 1023.0 1023.4 1025.6 -0.4 -2.2 -2.6 05Z Sat 05 Apr 1023.1 1023.5 1026.3 -0.4 -2.8 -3.2 06Z Sat 05 Apr 1022.7 1023.3 1026.6 -0.6 -3.3 -3.9

Time Day Date ONP SLE RDM ONP-SLE SLE-RDM ONP-RDM (GMT) Pressure Pressure Pressure Gradient Gradient Gradient Remarks ============== ======== ======== ======== ======== ======== ======== ======= 07Z Sat 05 Apr 1022.7 1023.3 1027.0 -0.6 -3.7 -4.3 08Z Sat 05 Apr 1022.8 1023.4 1027.4 -0.6 -4.0 -4.6 09Z Sat 05 Apr 1022.9 1023.5 1028.3 -0.6 -4.8 -5.4 10Z Sat 05 Apr 1023.3 1024.1 1029.2 -0.8 -5.1 -5.9 11Z Sat 05 Apr 1023.1 1024.1 1029.6 -1.0 -5.5 -6.5 12Z Sat 05 Apr 1023.4 1024.1 1029.5 -0.7 -5.4 -6.1 13Z Sat 05 Apr 1024.1 1024.5 1029.1 -0.4 -4.6 -5.0 14Z Sat 05 Apr 1024.7 1025.4 1029.4 -0.7 -4.0 -4.7 15Z Sat 05 Apr 1024.9 1025.5 1028.5 -0.6 -3.0 -3.6 16Z Sat 05 Apr 1024.7 1025.5 1026.8 -0.8 -1.3 -2.1 17Z Sat 05 Apr 1024.6 1025.6 1025.7 -1.0 -0.1 -1.1 18Z Sat 05 Apr 1024.6 1025.3 1024.9 -0.7 +0.4 -0.3 19Z Sat 05 Apr 1024.7 1024.8 1024.2 -0.1 +0.6 +0.5 20Z Sat 05 Apr 1024.1 1024.0 1023.3 +0.1 +0.7 +0.8 GSE 21Z Sat 05 Apr 1024.3 1024.0 1022.9 +0.3 +1.1 +1.4 GSE 22Z Sat 05 Apr 1024.5 1024.0 1022.7 +0.5 +1.3 +1.8 GSE 23Z Sat 05 Apr 1024.0 1023.4 1022.0 +0.6 +1.4 +2.0 GSE 00Z Sun 06 Apr 1023.9 1023.2 1021.6 +0.7 +1.6 +2.3 GSE 01Z Sun 06 Apr 1023.8 1023.1 1021.4 +0.7 +1.7 +2.4 GSE 02Z Sun 06 Apr 1023.7 1023.1 1021.5 +0.6 +1.6 +2.2 GSE 03Z Sun 06 Apr 1023.5 1022.9 1021.6 +0.6 +1.3 +1.9 GSE 04Z Sun 06 Apr 1023.4 1022.9 1021.8 +0.5 +1.1 +1.6 GSE 05Z Sun 06 Apr 1023.4 1023.0 1022.0 +0.4 +1.0 +1.4 GSE 06Z Sun 06 Apr 1023.0 1022.7 1021.9 +0.3 +0.8 +1.1 GSE 07Z Sun 06 Apr 1022.6 1022.5 1022.3 +0.1 +0.2 +0.3 GSE 08Z Sun 06 Apr 1022.4 1022.2 1022.4 +0.2 -0.2 +0.0 09Z Sun 06 Apr 1022.2 1022.2 1023.0 +0.0 -0.8 -0.8 10Z Sun 06 Apr 1022.2 1022.1 1023.4 +0.1 -1.3 -1.2 11Z Sun 06 Apr 1021.3 1021.3 1023.2 +0.0 -1.9 -1.9 12Z Sun 06 Apr 1020.4 1020.5 1022.8 -0.1 -2.3 -2.4 13Z Sun 06 Apr 1020.1 1019.7 1022.4 +0.4 -2.7 -2.3 14Z Sun 06 Apr 1020.3 1019.6 1022.5 +0.7 -2.9 -2.2 15Z Sun 06 Apr 1019.9 1019.4 1020.9 +0.5 -1.5 -1.0 16Z Sun 06 Apr 1019.4 1019.3 1018.8 +0.1 +0.5 +0.6 GSE 17Z Sun 06 Apr 1019.2 1019.9 1017.2 -0.7 +2.7 +2.0 18Z Sun 06 Apr 1019.0 1020.2 1015.9 -1.2 +4.3 +3.1 19Z Sun 06 Apr 1018.7 1019.9 1014.7 -1.2 +5.2 +4.0 20Z Sun 06 Apr 1017.9 1019.2 1013.3 -1.3 +5.9 +4.6 21Z Sun 06 Apr 1017.5 1018.8 1012.7 -1.3 +6.1 +4.8 22Z Sun 06 Apr 1017.2 1018.2 1012.2 -1.0 +6.0 +5.0 23Z Sun 06 Apr 1016.4 1016.9 1012.1 -0.5 +4.8 +4.3 00Z Mon 07 Apr 1016.1 1016.0 1014.0 +0.1 +2.0 +2.1 GSE 01Z Mon 07 Apr 1015.7 1015.3 1014.6 +0.4 +0.7 +1.1 GSE 02Z Mon 07 Apr 1015.7 1015.4 1013.7 +0.3 +1.7 +2.0 GSE 03Z Mon 07 Apr 1015.8 1015.6 1013.2 +0.2 +2.4 +2.6 GSE 04Z Mon 07 Apr 1015.8 1015.8 1013.2 +0.0 +2.6 +2.6 05Z Mon 07 Apr 1016.4 1016.1 1013.6 +0.3 +2.5 +2.8 GSE 06Z Mon 07 Apr 1016.9 1016.6 1013.5 +0.3 +3.1 +3.4 GSE

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 $$