The Strongest Summer time Jet Stream to Hit the Pacific Northwest EVER!
Reposted from the Cliff Mass Climate and Local weather Weblog
Thursday, July 18, 2019
The Strongest Summer time Jet Stream to Hit the Pacific Northwest EVER!
A unprecedented climate occasion has been occurring above our heads throughout the previous 24-hour. A report that was not solely damaged, however shattered to little items.
The strongest summer season jet stream ever noticed over the Pacific Northwest.
The jet stream is a slender present of robust winds within the higher troposphere (roughly 25,000 ft to 35,000 ft above sea stage). It’s typically the conduit for storms and is related to a big temperature gradient (change in temperature with horizontal distance) within the center and decrease troposphere. Winds within the jet stream are westerly (from the west) and plane wish to fly within the jet stream going east, whereas avoiding it going west. You at the moment are Jet Steam licensed!
The ECMWF 12-h forecast for five AM this morning for the wind pace on the 250 hPa stress stage (about 35,000 ft) clearly exhibits the jet stream, with the orange/crimson colours being the strongest winds.
This can be a HUGE and really zonal (east-west oriented) jet stream…as proven by the subsequent map on the identical time. This appears like January, not July.
However now I’ll actually impress you.
The wind this morning on the radiosonde web site at Quillayute (UIL) was 140 knots (161 mph) on the 250 hPa stage (once more round 35,000 ft). That is amazingly quick for this time of the 12 months.
The plot under exhibits the climatology of the winds at this stage all year long at this location, with the crimson traces being the all-time report for every date (the black traces are common winds for the date, blue traces, the report low winds). Vertical soundings at Quillayute return to the late 1960s…so we’re speaking a few half-century of observations. The earlier report was round 110 knots…so the 140 knots noticed right now completely shattered the report. In truth, the wind over us proper now could be larger then the data for any date from April 1 to mid-October.
File, however lesser winds, are being noticed on the subsequent higher air station to the south: Salem, Oregon (see under)
A really uncommon occasion. And one which shouldn’t be pinned on international warming. In truth, a number of of the worldwide warming jet stream papers (e.g., by Jennifer Francis and others) recommend that international warming will carry a weak and wavy jet stream. That is simply the alternative.
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