Area Forecast Discussion
Issued by NWS Blacksburg, VA

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000 FXUS61 KRNK 171901 AFDRNK Area Forecast Discussion National Weather Service Blacksburg VA 301 PM EDT Sun Sep 17 2017 .SYNOPSIS... High pressure will remain over the region into early next week resulting in mainly dry and mild weather over the next few days. Jose should track north, off the east coast Monday and Tuesday, before sliding just east of New England on Wednesday. && .NEAR TERM /THROUGH MONDAY/...
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As of 300 PM EDT Sunday... High pressure will remain in control of our weather this afternoon into Monday. An upper level shortwave will pass to our north this afternoon into tonight. NAM,RAP,Hiresw-arw-east,HRRR,GFS and ECMWF support the mention of isolated showers this afternoon into this evening across the north. The combinations of low level convergence and orographic lift may generate some isolated shallow convection this afternoon beneath dry air aloft. Kept pops trimmed below 30 percent, with the models generally overdoing pops and qpf recently. Hurricane Jose was at 31N and 71.9W at 15z and lift north in the Atlantic ocean. See latest NHC advisory. Any shallow convection will diminish quickly this evening with the loss of solar heating. Residual late day clouds will spread out into a leftover trapped strato-cu layer this evening into tonight, then clearing expected overnight. Light winds and low level moisture will create patchy fog especially in the western valleys. Low temperatures tonight will range from the mid 50s in the mountains to the lower 60s in the piedmont. The Eastern U.S. ridge will continue Monday with a subtle influence from Hurricane Jose as it moves northward just off the coast. Circulation around Jose may push some low level moisture into the region on northeasterly winds Monday, with enhanced convergence and orographic affects from the Blue Ridge westward yielding Isolated to widely scattered showers. High temperatures Monday will vary from the upper 60s in the west to the lower 80s in the east.
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&& .SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/...
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As of 300 PM EDT Sunday... Upper pattern amplifies over this time frame with a deep long wave trof developing over the western United States and ridging over the east. Future track of Hurricane Jose is very uncertain after Wednesday, with diverging solutions in the models. Monday night into Tuesday night winds will increase over the Virginia and North Carolina Piedmont, from the northeast then gradually from the northwest, in response to Hurricane Jose. This will result in downsloping in the foothills and Piedmont. Will trend toward warmer guidance for afternoon highs On Tuesday. Think high clouds from showers and thunderstorms upstream in the Plains and Mississippi Valley will only extend to the axis of the upper ridge axis and not get this far east. Will be left with low and mid level moisture trapped under the subsidence inversion. Cloud cover and any chance of precipitation will be especially limited on Tuesday when subsidence may be enhanced as this will be the time when Hurricane Jose is the closest to the region.
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&& .LONG TERM /THURSDAY THROUGH SUNDAY/...
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As of 1230PM EDT Sunday... 500MB heights rise and upper ridge continues to build over the east through Friday. Seeing a small probability of precipitation on Monday along the southern Blue Ridge and foothills where there will be weak easterly upslope winds. No organized synoptic scale for precipitation through Sunday. Temperatures will remain at or just above normal.
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&& .AVIATION /19Z SUNDAY THROUGH FRIDAY/... As of 135 PM EDT Sunday... SCT-BKN VFR clouds expected this afternoon into tonight. An isolated shower could form this afternoon across northern portions of the forecast area. Expect may see another round of high end strato-cu or mid deck canopy redevelop overnight as moisture is trapped beneath the inversion aloft. This may again produce a round of VFR cigs with added sub-VFR conditions with fog/stratus in the valleys. Any low clouds and fog should lift quickly by 13z Monday with VFR conditions returning. Isolated MVFR showers may be possible in the mountains Monday Afternoon. Winds will remain light and variable for the TAF period. High confidence on ceilings, visibilities and winds during the taf period. Extended Aviation Discussion... Overall persistence forecast to prevail for much of next week with strengthening high pressure remaining in place between Jose offshore and weak cold fronts approaching from the west. This should maintain good flying weather outside of early morning fog/stratus through late next week, with only isolated diurnal showers possible each afternoon. && .RNK WATCHES/WARNINGS/ADVISORIES... VA...None. NC...None. WV...None. && $$ SYNOPSIS...JH NEAR TERM...KK SHORT TERM...AMS LONG TERM...AMS AVIATION...JH/KK

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