Chris Weijenborg
chrisweijenborg.bsky.social
Chris Weijenborg
@chrisweijenborg.bsky.social
Assistant Professor at the University of Wageningen, interested in atmospheric dynamics, extratropical cyclones, moisture transport and the storm tracks.
Impact will probably/hopefully be less, also because the region of strongest winds south of #Herminia seem to pass south of Ireland.
January 25, 2025 at 3:00 PM
#StormEowyn is off to Norway, but the next one in the train of the same cluster of cyclones is approaching Ireland tomorrow, named #Herminia by the Spanish met service. Looks again a bit more a Shapiro-Keyser type cyclone, though this is less clear as that compared to Eowyn.
January 25, 2025 at 3:00 PM
#StormEowyn is predicted to intensify rapidly until reaching Ireland. Still some spread but most models agree with wind gusts up to 200+ km/hour (Arome as well) at land fall in Ireland, possibly related to a sting jet.
January 23, 2025 at 8:10 PM
The next cyclone developing along the same jet streak is already predicted a few days later until Sunday, though it seems less intense than #Eowyn for now.
January 22, 2025 at 3:45 PM
Very interesting case of cyclone clustering coming up at the end of the week. The atmospheric jet stream already intensified along the east coast of the USA/West Atlantic, which leads to the rapid deeping of
#StormEowyn later this week. Quite often these intense cyclones are warm core cyclones.
January 22, 2025 at 3:43 PM
Cyclone Conall is affecting the northern part of the Netherlands tonight, but it seems that next week will be stormy and wet as well #cycloneclustering #conall:

wxcharts.com/gifs/N8XGova...
November 27, 2024 at 2:08 PM
The final state resembles that of a low pressure system (in the Northern Hemisphere), with counterclockwise flow around it (right plot):
November 22, 2024 at 2:42 PM
This week we discussed the shallow water equations and geostrophic adjustment in the dynamics class. Though it is very abstract, I think the final insight that geostrophic balance is reached is very satisfying:
November 22, 2024 at 2:30 PM
Rapid deepening of cyclone Bert from 987 hPa to 939 hPa in just 1.5 days, will affect mainly Northern UK, meanwhile very mild air is advected to the north.
November 21, 2024 at 6:37 PM