193 FXUS61 KRNK 271925 CCA AFDRNKArea Forecast Discussion...CORRECTED National Weather Service Blacksburg VA 325 PM EDT Sat Sep 27 2025
.SYNOPSIS...
Surface high pressure will work its way into the region overnight. By Monday morning, moisture increases ahead of a tropical system interacting with an upper disturbance. This will keep shower chances around early next week before drying out midweek.
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.NEAR TERM /THROUGH TONIGHT/... As of 130 PM EDT Saturday...
Key Message:
1) Foggy conditions early will give way to clearing skies and dry conditions through the afternoon.
Surface high pressure will work its way into the Northeast from the southern Great Lakes region starting tonight, and into Sunday morning. This will keep Sunday a predominantly quiet and dry day for most across the area as foggy skies early look to dissipate to scattered to mostly clear skies by mid morning. As current TD9 and future Imelda pushes north, and starts to interact with the remnant upper level cut-off low over the Mid- Atlantic states, some moisture looks to be pulled into the southeast. This may lead to some dense cirrus clouds moving into the VA and NC Piedmont on Sunday afternoon and evening; however, rain chances from this tropical system does not look likely on Sunday or Sunday evening across the region. Overall Sunday looks to be the last dry day before a string of several wet days are forecast through early next week.
With clearing skies on Sunday, temperatures will climb into the mid to upper 70s for areas west of the Blue Ridge, and upper 70s to low 80s east of the Blue Ridge.
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.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/... As of 1210 PM EDT Saturday...
Key Messages:
1) Any impacts from Tropical Depression Nine will occur Monday into Tuesday.
2) Heavy cloud cover keeps temperatures near to slightly below normal.
3) Minor flooding will be possible due to potential heavy rainfall east of the Blue Ridge.
Quiet conditions will continue across the area Sunday night with only a stray shower possible in the far southern Piedmont areas. Tropical Depression Nine is expected to have strengthened into at least a Tropical Storm, which would be named Imelda. The system would be moving NNW and approaching the Carolina coastlines Sunday night into Monday. In the past couple of model runs, there has been a significant shift as to where the system is expected to track once it approaches the East Coast. Unlike yesterday, TD9 is now expected to stall before making landfall and eventually turn east and out to sea midweek. This would mean less impacts for our area, although moisture advection combined with a stalled frontal boundary would still provide some heavy rainfall across the area, particularly for the eastern Piedmont and down into NC.
This shift in the track is due to TD9 taking longer to become organized and meandering near the Bahamas. It is also now expected to track north at a slower pace, which will allow Hurricane Humberto, now a Category 4 storm, to be closer to the system and have more influence on TD9, despite Humberto remaining out to sea. At the same time, the deep trough that is over the Eastern CONUS is expected to weaken and with the slower arrival of TD9, the system will be less pulled to the north and west as the trough will be weaker. This complex combination is why the track is now expected to turn east and out to sea early next week. However, this does not mean that there is no chance of a westward turn, as some models still do show that possibility, but the chances have significantly lowered. Should the track revert back west, then higher impacts and very heavy rainfall could impact the area.
With all of that said, heavy rainfall of 1-2" will be possible east of the Blue Ridge, with lighter amounts further west where the moisture does not fully advect to. A marginal risk for excessive rainfall is in place east of the Blue Ridge for Monday/Tuesday, as flooding could occur in low-lying, urban, and flood-prone areas, especially where recent heavy rains have fallen. Severe weather is not expected during the period at this time.
Temperatures remain near normal but on the cooler side, due to heavy cloud cover and rain. Highs will be in the 70s Monday, lowering into the 60s/70s on Tuesday. Overnight lows remain mild, also due to the clouds, in the 50s/60s.
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.LONG TERM /WEDNESDAY THROUGH SATURDAY/... As of 1210 PM EDT Saturday...
Key Messages:
1) Some uncertainty still exists in the forecast, dependent on TD9.
2) High pressure builds into the area and wedges in place late week.
3) Temperatures will be near to below average.
While there is some uncertainty regarding the forecast for next week, recent trends in model guidance show that current Tropical Depression Nine, likely a tropical storm next week, will begin to head east and out to sea in the wake of Hurricane Humberto. Should this occur, any residual showers will taper off by afternoon, with drier air moving into the area. Winds will remain elevated, with NE winds of 5-10 mph gusting to 15-20 mph at times through Thursday. This is in part due to a very large and strong high pressure system in Canada, which will quickly move down into the Northeastern US by Thursday, wedging in east of the Appalachians and keeping quiet weather across the entire forecast area through the end of the week and into next weekend.
If TD9 does not take an eastward turn midweek, it could stall offshore or even drift back west and head inland across the Carolinas. While this scenario is looking less likely, it is still a possibility. Should this occur, the forecast could be drastically different, with showers continuing through late week, despite the high moving in from the north. For now, this is not anticipated, but until there is higher confidence in the long range track of TD9, it remains possible.
Temperatures will be cool, thanks to cloud cover on Wednesday, and the wedge for the late week. Highs will be in the 60s to low 70s, with the highest elevations perhaps staying in the 50s. Overnight lows will mainly be in the 40s, with the highest elevations dipping down into the 30s. Temperatures have been trending colder, so these values could change.
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.AVIATION /18Z SATURDAY THROUGH WEDNESDAY/... As of 130 PM EDT Saturday...
Shower activity along and north of the 460 corridor is expected to finally push north and east of the area through this afternoon, which will also start to raise ceilings across the area. While ceilings are raising, and cloud cover is dissipating enough instability is developing that some shower and thunderstorm activity is developing in eastern TN, which looks to push east through the evening. This will lead to some thunderstorm potential for BCB, BLF, and DAN this afternoon and evening. These storms may cause brief periods of MVFR to IFR restrictions at these three terminals. After these storms dissipate this evening, IFR to LIFR restrictions look to develop at all terminals overnight. VFR conditions look to return to all terminals by the 13-14 UTC timeframe. With high pressure moving into the region overnight, VFR conditions look to remain through the end of the TAF period on Sunday.
EXTENDED AVIATION OUTLOOK...
Rain may return for Monday and Tuesday as easterly flow brings moisture back into the area from the Atlantic Coast. By Monday, a tropical cyclone will be threatening the southeast Atlantic Coast. There is still a lot of uncertainty as to the track of a tropical cyclone beyond Monday, so aviation interests should keep alert to the forecast along the southeast coast. While confidence is low in the exact impacts, heavy rainfall could be possible at times through midweek, which would cause widespread sub-VFR flight conditions for all terminals.
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.RNK WATCHES/WARNINGS/ADVISORIES... VA...None. NC...None. WV...None.
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SYNOPSIS...EB NEAR TERM...EB SHORT TERM...JCB LONG TERM...JCB AVIATION...EB/PM
NWS RNK Office Area Forecast Discussion