Thursday, October 2, 2014

Frigid Weekend in the Mix

Public weather briefing

The dreary Thursday we are currently experiencing will continue into the night, with cooler temperatures arriving early in the morning Friday. Winds will shift to out of the northwest overnight, making for a cool, breezy Friday. Highs tomorrow will not make it out of the 50s, and Saturday will be even colder, with a high around 46. Temperatures Saturday morning will dip into the mid 30s, with a chance for some cold rain or even snow (!) early. Sunday will be drier and cold as well; we do not begin to warm up until early next week, with highs Monday still in the 50s and a possible high of 60 by Tuesday.

Forecast 

Tonight. Quite rainy. Over half an inch of rain is possible. Low of 53.

Friday. Some lingering rain showers, especially in the morning. High of 54. Very windy; winds around 15 mph, gusting as high as 30 mph.

Friday night. Possible showers late. Cold. Low around 35. Windy conditions continue.

Saturday. Coldest day of the week. High around 46.

Sunday. Possible return of sun, but still mostly cloudy. Winds die down in the morning. High of 53.

Outlook for Monday through Wednesday. First part of next week looks to remain cool, with temps remaining in the mid-50s. Will be much clearer and drier than the weekend. Lows at night typically in the low 40s. Fall has arrived. 

Forecast Discussion

The cold front initiated by the low in southern Canada comes through later tonight, roughly around midnight. We will see widespread precipitation throughout tonight and early Friday morning. This precipitation was initially generated from convection in Missouri, and enhanced by a deep trough aloft. This deep trough exhibited significant PVA by the thermal wind over much of the central plains, further driving upward vertical motion. The genesis of the remaining precipitation was from the cold front, so we will likely see an end to the heaviest rain after midnight tonight. 

The very northerly flow on the other side of this front will bring cold temperatures for Saturday and much of the weekend, with the possibility for snow early Saturday morning. The MOS puts this probability at around 66 percent as of the 18Z forecast, but this is only if the atmosphere is precipitating. The flow over our area remains westerly/northwesterly through much of the weekend and early next week. Conditions will be much drier by Sunday, and continue through the early week, due to a surface low which will remain just north of the forecast area for several days.

Alex Haugstad
Conner Hardesty