003 FXUS62 KRAH 120634 AFDRAHArea Forecast Discussion National Weather Service Raleigh NC 233 AM EDT Fri Sep 12 2025
.SYNOPSIS... High pressure centered to our north will extend down through the Mid Atlantic and the Carolinas through the weekend, although a northeasterly wind flow and passage of an upper level trough into the region will bring periods of clouds each day.
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.NEAR TERM /THROUGH TONIGHT/... As of 140 PM Thursday...
The morning stratus over eastern sections continues to slowly but steadily lift this afternoon with patchy breaks in the cloud deck, as the area of higher PW over E NC pushes southward and drier air aloft mixes into and erodes the lower clouds, although with daytime mixing, at least partial cloud cover should linger E of Hwy 1 into the evening. With the expected downturn in PW and dry air aloft noted on GOES layer WV imagery, clouds should be few near and after midnight with a lower risk of drizzle or patchy light rain compared to previous nights. However, the limited clouds late and a slow uptick in surface dewpoints combined with very light winds and stagnant near-surface air overnight should facilitate radiational cooling overnight, favoring development of areas of fog and shallow stratus. This should be most prevalent across the N and E CWA which has seen some light precip over the last few days and where the ground is a bit more damp, a scenario generally agreed upon by LAV guidance, the HREF mean, and the experimental REFS. Fog may be briefly dense in some spots in the N CWA, according to the HREF. Lows should be slightly lower than last night, mostly in the upper 50s to lower 60s. -GIH
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.SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/... As of 150 PM Thursday...
High pressure will remain nearly stationary across the northeastern United States with a ridge continuing to extend southwest into the Carolinas. Similar to the last few days, low level flow will remain out of the north, and cannot rule out mostly cloudy skies at the beginning of the day, but unlike the last few days, clouds should scatter out quickly during the morning allowing for a mostly sunny afternoon. Highs will still be slightly below normal, but a couple degrees warmer than today, ranging from the upper 70s to the mid 80s. The lack of cloud cover will allow more radiational cooling to occur, and all locations should drop into the 50s.
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.LONG TERM /SUNDAY THROUGH THURSDAY/... As of 205 AM Friday...
* Near-normal temperatures likely, with the potential for isolated to scattered showers possible in the east midweek.
Surface ridging and high pressure should generally continue to dominate over central North Carolina for much of the long term period. Temperatures on Sunday and Monday should be near to slightly above normal. This equates to maximum temperatures reaching the low- to-mid 80s each afternoon and lows each night in the upper 50s to low 60s. A dry backdoor cold front looks to move through the region Monday with surface high pressure building back in behind it. This should allow temperatures to drop back into the mid 70s to low 80s each afternoon Tuesday though Thursday. The rain forecast for Tuesday through Thursday has trended somewhat wetter in the east, as models and their ensembles have started coming into better agreement of a coastal system potentially bringing isolated to scattered showers into the eastern regions of the CWA. However, it is still unclear where the system will form and how far inland rain will be able to spread.
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.AVIATION /06Z FRIDAY THROUGH TUESDAY/... As of 230 AM Friday...
24 Hour TAF Period: Surface high pressure extending into the region from the north and NE low-level flow will result in a threat for sub- VFR visibilities from fog overnight across central NC, as winds are very light to calm and skies are mostly clear. Some scattered to broken clouds around 6-10 kft continue across the far NW and far east, but they are beginning to diminish and move out of the area. Thus MVFR to IFR to LIFR visibilities from fog will be possible at any of the TAF sites into early morning, with the best chance during the usual 09z-13z timeframe. The greatest confidence is at KRDU according to guidance and latest observational trends, which depict an area of fog currently over the far NE Piedmont (including KHNZ, KLHZ and KTDF) moving south over the next few hours. This is followed by KFAY/KRWI, which guidance generally depicts to be on the edge of the densest fog, and lastly INT/GSO. Model soundings and current observations indicate this will be more of a fog threat vs low stratus, but some IFR/LIFR ceilings still can`t be ruled out. Any fog will lift and dissipate by mid-morning, with VFR conditions prevailing the rest of the day.
Outlook: Mostly VFR conditions are expected into early next week. Ridges of high pressure extending in from the north will dominate at the surface, although a few more clouds and gusty winds are possible late Fri with passage of an upper level trough into the area. A coastal system may bring scattered showers early next week, best chance in the east, but models differ and it is too early to specify details at this time.
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.RAH WATCHES/WARNINGS/ADVISORIES... None.
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SYNOPSIS...Hartfield NEAR TERM...Hartfield SHORT TERM...Green LONG TERM...Helock AVIATION...Danco/BSD/Hartfield
NWS RAH Office Area Forecast Discussion