Observed Sea Level Pressure Differences
Time is given in UTC
Oregon and Washington
01 December 2025
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
00|232 274 -4.2| 274 |260 274 -1.4|259 274 -1.5|267 274 -.7|274 283 -.9
01|233 273 -4.0| 273 |262 273 -1.1|260 274 -1.4|268 274 -.6|273 286 -1.3
02|236 274 -3.8| 274 |264 274 -1.0|261 274 -1.3|266 274 -.8|274 288 -1.4
03|237 270 -3.3| 270 |266 270 -.4|267 276 -.9|265 276 -1.1|270 290 -2.0
04|237 274 -3.7| 274 |265 274 -.9|270 280 -1.0|270 280 -1.0|274 287 -1.3
05|242 278 -3.6| 278 |270 278 -.8|270 282 -1.2|272 282 -1.0|278 291 -1.3
06|243 280 -3.7| 280 |272 280 -.8|270 282 -1.2|273 282 -.9|280 292 -1.2
07|241 280 -3.9| 280 |273 280 -.7|268 283 -1.5|274 283 -.9|280 293 -1.3
08|242 278 -3.6| 278 |266 278 -1.2|259 279 -2.0|275 279 -.4|278 290 -1.2
09|240 273 -3.3| 273 |259 273 -1.4|259 276 -1.7|269 276 -.7|273 294 -2.1
10|238 272 -3.4| 272 |261 272 -1.1|257 275 -1.8|266 275 -.9|272 289 -1.7
11|238 272 -3.4| 272 |261 272 -1.1|257 275 -1.8|266 275 -.9|272 289 -1.7
HR OTH-SEA AST-SEA HQM-SEA UIL-BLI OLM-BLI SEA-YKM
Columbia Gorge
01 December 2025
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
00| 251 |251 254 -.3|254 | 286
01| 255 |255 256 -.1|256 | 287
02| 255 |255 255 .0|255 | 286
03| 258 |258 256 .2|256 | 286
04| 257 |257 254 .3|254 | 289
05| 263 |263 259 .4|259 | 288
06| 266 |266 262 .4|262 | 290
07| 264 |264 260 .4|260 | 292
08| 268 |268 266 .2|266 | 295
09| 263 |263 259 .4|259 | 293
10| 261 |261 258 .3|258 | 290
11| 261 |261 258 .3|258 | 290
HR AST-PDX PDX-TTD TTD-DLS DLS-HRI
SW British Columbia
01 December 2025
HR BLI-YZT BLI-YQQ BLI-YHE BLI-YKA OMK-YKA
00|274 258 1.6|274 274 .0|274 278 -.4|274 304 -3.0|283 304 -2.1
01|274 257 1.7|274 272 .2|274 277 -.3|274 300 -2.6|287 300 -1.3
02|274 267 .7|274 273 .1|274 279 -.5|274 300 -2.6|285 300 -1.5
03|276 272 .4|276 274 .2|276 278 -.2|276 301 -2.5|288 301 -1.3
04|280 268 1.2|280 275 .5|280 278 .2|280 300 -2.0|289 300 -1.1
05|282 267 1.5|282 276 .6|282 282 .0|282 302 -2.0|296 302 -.6
06|282 264 1.8|282 280 .2|282 286 -.4|282 304 -2.2|297 304 -.7
07|283 260 2.3|283 279 .4|283 285 -.2|283 304 -2.1|297 304 -.7
08|279 |279 278 .1|279 |279 |292
09|276 248 2.8|276 274 .2|276 278 -.2|276 299 -2.3|293 299 -.6
10|275 |275 271 .4|275 |275 296 -2.1|295 296 -.1
11|275 255 2.0|275 269 .6|275 276 -.1|275 291 -1.6|295 291 .4
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