_______
Once the front passes Thursday evening...intense cold advection commences immediately with temperatures crashing rapidly. Equivalent potential temp profiles go vertical for a few hours Thursday night and combined with a strong surface pressure gradient and the cold advection...expect wind gusts to periodically approach 35 to possibly 40 mph for several hours Thursday night. Also not out of the question for precipitation to end as a few snowflakes late Thursday evening but not anticipating any impact. One impact that may need to be considered for the Friday morning commute is the potential for a flash freeze as temperatures drop 30- 35 degrees from sunset Thursday to daybreak Friday. The gusty winds may help to mitigate this concern somewhat and dry surfaces...but this will be something to monitor. A strong area of high pressure will expand across the area from the Canadian prairies for Friday with dry and much colder air returning. Expect plenty of sunshine Friday and a continuation of gusty flow as the pressure gradient remains tight. Winds will relax Friday night as the core of the high moves into the region. Temps...the roller coaster ride continues with the temperatures. After highs climbing into the low and mid 60s over much of the forecast area Thursday...expect highs only in the 20s Friday. A mild night tonight with temperatures remaining in the 50s in some areas will fall all the way into the single digits and teens by Friday night. An overall model blend worked reasonable for most periods with a lean towards the MAVMOS. Subzero wind chills are possible for some Friday and Friday night. && .LONG TERM /Saturday through Tuesday/... Issued at 227 AM EST Wed Feb 6 2019 Ensembles are in good agreement overall in suggesting a progressive nature to the long wave features during this period. Mean upper ridging over the local area this weekend will drift off to the east, while upper troughing moves into the Plains by next Tuesday. Despite the overall agreement with the main features, there are considerable differences among the individual members as to the timing, track, and intensity of disturbances that may eject out of the approaching western trough. For now, will broadbrush PoPs for mixed precipitation from Sunday through the end of the forecast period. PoPs will probably need fine tuning as trends to the disturbances get established with time. At this time, ensembles suggest potential for some accumulating snow at times. &&
No comments:
Post a Comment