Observed Sea Level Pressure Differences
Time is given in UTC
Oregon and Washington
11 September 2026
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
00| 155 | 155 |165 155 1.0|158 150 .8| 150 |155 099 5.6
01|173 153 2.0|168 153 1.5|162 153 .9|157 147 1.0|149 147 .2|153 100 5.3
02|173 149 2.4|164 149 1.5|161 149 1.2|156 147 .9|150 147 .3|149 102 4.7
03|178 153 2.5|166 153 1.3|164 153 1.1|157 149 .8|150 149 .1|153 105 4.8
04|184 157 2.7|170 157 1.3|166 157 .9|155 149 .6|151 149 .2|157 108 4.9
05|186 154 3.2|167 154 1.3|165 154 1.1|156 146 1.0|153 146 .7|154 107 4.7
06|183 159 2.4|166 159 .7|166 159 .7|153 147 .6|155 147 .8|159 108 5.1
07|182 162 2.0|162 162 .0|161 162 -.1|152 150 .2|156 150 .6|162 110 5.2
08|181 161 2.0|165 161 .4|163 161 .2|155 151 .4|157 151 .6|161 114 4.7
09|181 164 1.7|164 164 .0|163 164 -.1|153 151 .2|157 151 .6|164 117 4.7
10|182 166 1.6|167 166 .1|164 166 -.2|154 156 -.2|161 156 .5|166 121 4.5
11|185 168 1.7|168 168 .0|165 168 -.3|151 155 -.4|162 155 .7|168 124 4.4
12|179 169 1.0|163 169 -.6|162 169 -.7|151 157 -.6|165 157 .8|169 130 3.9
13|178 171 .7|162 171 -.9|160 171 -1.1|152 161 -.9|165 161 .4|171 137 3.4
14|180 171 .9|164 171 -.7|164 171 -.7|154 167 -1.3|165 167 -.2|171 141 3.0
15|179 170 .9|165 170 -.5|164 170 -.6|155 168 -1.3|166 168 -.2|170 140 3.0
16|173 172 .1|164 172 -.8|167 172 -.5|157 169 -1.2|165 169 -.4|172 140 3.2
17|173 173 .0|164 173 -.9|166 173 -.7|156 169 -1.3|169 169 .0|173 139 3.4
18|170 175 -.5|161 175 -1.4|165 175 -1.0|156 169 -1.3|164 169 -.5|175 138 3.7
19|167 171 -.4|158 171 -1.3|162 171 -.9|156 165 -.9|161 165 -.4|171 132 3.9
20| 164 |152 164 -1.2|159 164 -.5|152 161 -.9|157 161 -.4|164 128 3.6
21| 160 |149 160 -1.1|155 160 -.5|150 157 -.7|151 157 -.6|160 124 3.6
22| 154 |145 154 -.9|151 154 -.3|145 152 -.7|146 152 -.6|154 119 3.5
23| | | | | |
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
12 September 2026
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
00| 145 |135 145 -1.0|139 145 -.6|138 145 -.7|134 145 -1.1|145 113 3.2
01| 141 | 141 |140 141 -.1|138 142 -.4|131 142 -1.1|141 113 2.8
02| 139 |131 139 -.8|138 139 -.1|133 140 -.7| 140 |139 115 2.4
03| | | | | |
04| | | | | |
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
Columbia Gorge
11 September 2026
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
00| 141 |141 137 .4|137 105 3.2|105 077 2.8
01|168 142 2.6|142 139 .3|139 102 3.7|102 084 1.8
02|164 146 1.8|146 144 .2|144 105 3.9|105 086 1.9
03|166 152 1.4|152 | 110 |110 091 1.9
04|170 159 1.1|159 156 .3|156 116 4.0|116 100 1.6
05|167 164 .3|164 164 .0|164 117 4.7|117
06|166 167 -.1|167 165 .2|165 120 4.5|120 101 1.9
07|162 166 -.4|166 164 .2|164 124 4.0|124 107 1.7
08|165 168 -.3|168 166 .2|166 128 3.8|128 112 1.6
09|164 167 -.3|167 168 -.1|168 132 3.6|132 111 2.1
10|167 173 -.6|173 173 .0|173 138 3.5|138 116 2.2
11|168 175 -.7|175 176 -.1|176 139 3.7|139 122 1.7
12|163 177 -1.4|177 177 .0|177 139 3.8|139 125 1.4
13|162 173 -1.1|173 174 -.1|174 140 3.4|140 133 .7
14|164 171 -.7|171 172 -.1|172 150 2.2|150 139 1.1
15|165 168 -.3|168 166 .2|166 148 1.8|148 145 .3
16|164 169 -.5|169 166 .3|166 144 2.2|144 144 .0
17|164 170 -.6|170 168 .2|168 146 2.2|146 138 .8
18|161 169 -.8|169 167 .2|167 142 2.5|142 134 .8
19|158 159 -.1|159 158 .1|158 135 2.3|135 132 .3
20|152 150 .2|150 149 .1|149 125 2.4|125 127 -.2
21|149 144 .5|144 | 117 |117 119 -.2
22|145 136 .9|136 133 .3|133 107 2.6|107 113 -.6
23| | | |
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
12 September 2026
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
00|135 125 1.0|125 121 .4|121 102 1.9|102 107 -.5
01| 124 |124 122 .2|122 101 2.1|101 105 -.4
02|131 122 .9|122 120 .2|120 104 1.6|104 105 -.1
03| | | |
04| | | |
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
SW British Columbia
11 September 2026
HR BLI-YZT BLI-YQQ BLI-YHE BLI-YKA OMK-YKA
00|150 184 -3.4|150 146 .4|150 128 2.2|150 127 2.3|081 127 -4.6
01|147 181 -3.4|147 144 .3|147 128 1.9|147 123 2.4|084 123 -3.9
02|147 177 -3.0|147 146 .1|147 131 1.6|147 125 2.2|087 125 -3.8
03|149 173 -2.4|149 145 .4|149 134 1.5|149 132 1.7|091 132 -4.1
04|149 171 -2.2|149 145 .4|149 138 1.1|149 138 1.1|095 138 -4.3
05|146 169 -2.3|146 143 .3|146 141 .5|146 139 .7|095 139 -4.4
06|147 164 -1.7|147 140 .7|147 143 .4|147 140 .7|099 140 -4.1
07|150 161 -1.1|150 142 .8|150 145 .5|150 142 .8|103 142 -3.9
08|151 159 -.8|151 145 .6|151 149 .2|151 146 .5|108 146 -3.8
09|151 157 -.6|151 148 .3|151 153 -.2|151 151 .0|112 151 -3.9
10|156 154 .2|156 151 .5|156 155 .1|156 153 .3|119 153 -3.4
11|155 152 .3|155 151 .4|155 156 -.1|155 160 -.5|121 160 -3.9
12|157 150 .7|157 150 .7|157 158 -.1|157 163 -.6|126 163 -3.7
13|161 150 1.1|161 154 .7|161 160 .1|161 167 -.6|131 167 -3.6
14|167 151 1.6|167 155 1.2|167 163 .4|167 174 -.7|138 174 -3.6
15|168 154 1.4|168 160 .8|168 167 .1|168 180 -1.2|141 180 -3.9
16|169 156 1.3|169 163 .6|169 167 .2|169 183 -1.4|141 183 -4.2
17|169 157 1.2|169 164 .5|169 162 .7|169 180 -1.1|138 180 -4.2
18|169 158 1.1|169 166 .3|169 158 1.1|169 174 -.5|135 174 -3.9
19|165 161 .4|165 166 -.1|165 153 1.2|165 168 -.3|132 168 -3.6
20|161 162 -.1|161 164 -.3|161 145 1.6|161 162 -.1|128 162 -3.4
21|157 161 -.4|157 160 -.3|157 137 2.0|157 155 .2|122 155 -3.3
22|152 160 -.8|152 157 -.5|152 129 2.3|152 147 .5|119 147 -2.8
23| 156 | 154 | 126 | 143 | 143
HR BLI-YZT BLI-YQQ BLI-YHE BLI-YKA OMK-YKA
12 September 2026
HR BLI-YZT BLI-YQQ BLI-YHE BLI-YKA OMK-YKA
00|145 152 -.7|145 151 -.6|145 123 2.2|145 138 .7|118 138 -2.0
01|142 151 -.9|142 147 -.5|142 124 1.8|142 137 .5|118 137 -1.9
02|140 153 -1.3|140 145 -.5|140 127 1.3|140 139 .1|121 139 -1.8
03| 151 | 143 | 130 | 142 | 142
04| | | | |
HR BLI-YZT BLI-YQQ BLI-YHE BLI-YKA OMK-YKA
Station Identifiers:
AST Astoria OR
BLI Bellingham WA
CAR Cape Arago OR
DLS The Dalles OR
EAT Wenatchee WA
HQM Hoquiam WA
HRI Hermiston OR
HMS Hanford WA
OLM Olympia WA
OMK Omak WA
PDX Portland OR
SEA SeaTac WA
SPB Scapoose OR
SLE Salem OR
TTD Troutdale OR
UIL Quillayute WA
YKM Yakima WA
YHE Hope BC
YKA Kamploops BC
YQQ Comox BC
YZT Port Hardy BC