Meteorologist Cliff Mass reports the Pacific northwest jet stream over the US at the moment is the strongest ever recorded during summer:
An extraordinary weather event has been occurring above our heads during the past 24-hour. A record that was not only broken, but shattered to little pieces.
We’ve heard lots about how wavy and sluggish and ‘stuck’ the northern hemisphere jet stream has become, allegedly due to global warming, resulting in the summer heatwaves we’ve been seeing across the globe in 2018 and now in 2019. According to climate cultists, that’s global weirding. Well it seems the jet stream just flipped sides and got a whole lot weirder!
This is a HUGE and very zonal (east-west oriented) jet stream…as shown by the next map at the same time. This looks like January, not July.
Zonal, got that, not meridional. Not only zonal but record velocity zonal.
The plot below shows the climatology of the winds at this level throughout the year at this location, with the red lines being the all-time record for each date (the black lines are average winds for the date, blue lines, the record low winds). Vertical soundings at Quillayute go back to the late 1960s…so we are talking about a half-century of observations. The previous record was around 110 knots…so the 140 knots observed today absolutely shattered the record. In fact, the wind over us right now is greater then the records for any date from April 1 to mid-October.
Now that is impressive. It also impressively debunks the global warming narrative – made famous by Jennifer Francis – that the temperature difference between cold polar air and warm extratropical air is declining. What energises and drives the jet stream winds is the tropospheric temperature gradient across that boundary between the two air masses. When it’s more pronounced (as during winter), the jet stream travels faster. Therefore the temperature difference between polar and extratropical air must be very pronounced over the Pacific North West at the moment. As Cliff says:
A truly unusual event. And one that should not be pinned on global warming. In fact, several of the global warming jet stream papers (e.g., by Jennifer Francis and others) suggest that global warming will bring a weak and wavy jet stream. This is just the opposite.