1/27 – Brittany’s “Pleasant” Friday Evening Forecast
A transition to a warmer and more humid pattern will take place tonight into tomorrow as a surface ridge centered over the area today begins to shift to the east. In the mid and and upper levels, largely zonal southwesterly flow will persist through the tomorrow afternoon. Embedded within this zonal flow regime, very weak shortwave ridging will be moving through the area tomorrow, and this will keep enough subsidence in place to warrant a continuation of mainly clear skies through the afternoon hours.
Moisture return will be very gradual tonight, and expect to see another night of strong radiational cooling as clear skies and lighter winds persist. Lows will fall into the 30s and 40s, but rising dewpoints will prohibit a freeze from occurring over portions of southern Mississippi. Tomorrow will see a sharp rise in both moisture and warm air advection into the area as southerly flow deepens. Dewpoints are expected to climb into the upper 40s and low 50s and temperatures should warm into the upper 60s and lower 70s by the afternoon hours.
A strong vorticity maxima will slide in from the west on the back of the deep layer zonal flow regime in the mid and upper levels Saturday night into Sunday. Overall forcing with this feature will peak Sunday afternoon into Sunday evening over the forecast area, and this is when the highest PoP values are forecast to occur. The majority of rainfall will conclude by Sunday night with only lingering showers and low stratus/fog on the backside of the exiting surface trough through Monday morning. High temperatures will remain in the upper 60s to low 70s, but will be highly dependent on the extent of cloud coverage during the day.