Campus Weather Forecast

Friday: Morning clouds clearing // High: 47°F

Friday Night: Clear // Low: 30°F

Saturday: Sunny // High: 53°F

Saturday Night: Clear // Low: 40°F

Sunday: Clouds building in the afternoon // High: 65°F

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General Discussion:

Our warmer temperatures are giving way to cooler weather as two low-pressure systems shift in the pattern. Today (Friday) will be around 47°F, with Saturday seeing clearer skies, a low near 30°F, and a high around 53°F. Cooler temps and clouds return Sunday as the bomb cyclone’s effects move in.

-Iffrig

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Forecasters: Collier, Scheerer, Iffrig

Date Issued: 11/22/2024 0900 AM CST

Technical Discussion:

Key Messages

• The tale of two lows will come to an end creating variable weather conditions this weekend.
• Expect generally cooler temperatures with periods of warmth.
  

As we begin to say bye bye bye to our summer-like temperatures, we will begin to say you’re as cold as ice as cooler temperatures begin to build into the region. Driving this change are the two very potent low pressure systems; one to our east and the bomb cyclone to the west. These two pressure systems however will begin to gradually weaken and return to the general flow of the atmosphere allowing a ridge to build in for a brief moment in time. This ridge will bring with it slightly warmer temperatures compared to what we’ve been having and clearer skies. That being said, this ridge will not last long as the aforementioned bomb cyclone begins to fade, advecting moisture and cooler temperatures back to the region.

Breaking down each day, today (Friday) expect for the temperature to hover right around 47°F. This, however, will hinge on how long the cloud cover will remain in the region. Both the NAM and GFS model runs have the jet stream flowing south but gradually shifting to the east as the day progresses. 850mb level moisture is the primary driving factor for the presence of the clouds that built in overnight, and both models are resolving this moisture being advected out of the region by the early to mid afternoon (12:00 to 5:00 PM). On to Saturday, the previously mentioned ridge will be apparent in all levels of the atmosphere allowing for clear sky conditions for most, if not all of the day. These sky conditions will allow for efficient radiational cooling paving the way for our low temperature to sit around 30°F. On the flip side, this will also be very good for warming allowing for a high on Saturday near 53°F. As the bomb cyclone “detonates” and the aftermath makes its away to the region, expect much cooler temperatures and cloud cover return, and the ridge to gradually return to more zonal atmospheric flow on Sunday. Future shifts should monitor for the effects of the bomb cyclone as the week progresses.

-Iffrig