12/1 – Rob Knight’s “December Outlook” Thursday Morning Forecast
Temperatures will quickly rebound to normal for this time of year on Friday as the upper level trough ejects east and ridge centered over the Gulf of Mexico builds northward.
A mid latitude disturbance will be tracking east across the Central and High Plains Friday, crossing the upper/mid-Mississippi River Valley Friday night. As surface ridge north of the area slides east, southeasterly flow will return and bring moisture back to the area. Don’t have rain the forecast then but isolated showers may begin to develop in southern portions of the local area late Friday. As Saturday comes, the cold front associated with this system will be approaching the area midday. Instability looks to be fairly limited, thus not expecting much in the way of thunder activity but could be a few thunderstorms in the mix as the front moves in. Coverage should be less than 50% with the highest rain chances north of I-10 corridor. Showers will probably linger into Sunday as the cold front appears to stall over the area due the lack of southward digging of the disturbance.
The remainder of the forecast, early next week, will be similar to Sunday. The upper ridge, still centered in the southern Gulf of Mexico, remains in place. Since moisture really never gets flushed out, could still be looking at slight chance of rain Monday and Tuesday. Unusually warm temps would exist in the setup as that ridge builds north with. Global models suggest highs will be topping out in the upper 70s, possibly touching 80 degrees on Tuesday.