The Autumn Transition
Summer is over westward of the Cascade crest. Heat waves are done. Dense fume inwards western Washington is finished.
Take out your sweaters in addition to pelting gear. You volition require them. A argue to last thankful nosotros are living inwards the Northwest rather than cardinal in addition to southern California, which the threats of fires in addition to fume volition drib dead on for several months more.
Let's receive got a aspect at the latest ensemble prediction of the NOAA/NWS GFS model for surface air temperature at Sea-Tac Airport (remember an ensemble is when nosotros run the model many times using dissimilar initial conditions or model physics). The dark work is the hateful of the ensemble (generally a rattling skillful forecast) in addition to y'all tin encounter the prediction of the diverse ensemble members. The forecasts larn through September 16th.
No oestrus waves..in fact, nosotros hold back cooler temperatures, amongst Mon in addition to Tuesday barely getting into the 60s! Then a rattling little warm upward amongst highs inwards the 60s.
Midweek at 8 AM...wow... BIG trough over the northwest. Influenza A virus subtype H5N1 rattling cool designing for us.
The work for oestrus moving ridge lovers amid y'all is the rapid weakening of the sun, which has a big acquit upon no thing what the meteorology is doing.
We are running out of Sun (and time) for warm weather. To orbit y'all an idea, hither is the climatological temperatures for Sea Tac Airport, amongst the xanthous work showing the daily max temps. The vertical greenish work shows today. Temperatures receive got NEVER gotten inwards a higher house the depression 90sF for the balance of the calendar month in addition to shortly never inwards a higher house 90F.
The super-extended forecasts (e.g., the NAEFS US/Canada ensemble) present no hint of getting dorsum into the 80s. The cooler weather condition should last putting a damper on burn downward increment westward of the Cascade crest, in addition to increasing westerly period of time volition hold eastward WA in addition to Canadian fume away from us. For me, I suspect the calls nearly "smokestorms" volition last over.
Take out your sweaters in addition to pelting gear. You volition require them. A argue to last thankful nosotros are living inwards the Northwest rather than cardinal in addition to southern California, which the threats of fires in addition to fume volition drib dead on for several months more.
Let's receive got a aspect at the latest ensemble prediction of the NOAA/NWS GFS model for surface air temperature at Sea-Tac Airport (remember an ensemble is when nosotros run the model many times using dissimilar initial conditions or model physics). The dark work is the hateful of the ensemble (generally a rattling skillful forecast) in addition to y'all tin encounter the prediction of the diverse ensemble members. The forecasts larn through September 16th.
No oestrus waves..in fact, nosotros hold back cooler temperatures, amongst Mon in addition to Tuesday barely getting into the 60s! Then a rattling little warm upward amongst highs inwards the 60s.
And amongst the cooling temperatures, at that spot volition last multiple opportunities for low-cal pelting (see ensemble predictions for 3-h precipitation).
Why all the changes? Because of a major reconfiguration of the atmosphere amongst the evolution of a persistent upper score trough over the northeast Pacific.
To illustrate, hither is the upper-level map (500 hPa, nearly 18,000 ft ASL), showing a major trough correct off our shore.
Midweek at 8 AM...wow... BIG trough over the northwest. Influenza A virus subtype H5N1 rattling cool designing for us.
We are running out of Sun (and time) for warm weather. To orbit y'all an idea, hither is the climatological temperatures for Sea Tac Airport, amongst the xanthous work showing the daily max temps. The vertical greenish work shows today. Temperatures receive got NEVER gotten inwards a higher house the depression 90sF for the balance of the calendar month in addition to shortly never inwards a higher house 90F.
The super-extended forecasts (e.g., the NAEFS US/Canada ensemble) present no hint of getting dorsum into the 80s. The cooler weather condition should last putting a damper on burn downward increment westward of the Cascade crest, in addition to increasing westerly period of time volition hold eastward WA in addition to Canadian fume away from us. For me, I suspect the calls nearly "smokestorms" volition last over.
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