762 FXUS62 KRAH 111750 AFDRAHArea Forecast Discussion National Weather Service Raleigh NC 150 PM EDT Thu Sep 11 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 /SATURDAY THROUGH THURSDAY/... As of 150 PM Thursday...
* Dry weather with near-normal temperatures likely.
Long-range models are still in good agreement that Saturday and Sunday will be mostly sunny with temperatures near normal, in the lower 80s and the upper 50s. However, models begin to diverge by the beginning of next week. One cluster of models still shows a cold front passing over the Great Lakes during the weekend and moving across North Carolina on Monday, with minimal moisture and no precipitation. Another cluster of models is showing low pressure spin up along the front that passed through several days ago which has been stationary off the Atlantic shoreline. While it previously looked like any precipitation with the offshore front would only clip eastern North Carolina, the 00Z ECMWF is now a wet outlier showing rain moving west across most of the state Tuesday and especially Wednesday. Splitting the difference between these possibilities, have brought a slight chance of showers/storms as far west as US-1, primarily for Tuesday afternoon, although Sampson County should keep a minimal chance for showers both Wednesday and Thursday. Temperatures should still drop slightly Tuesday and Wednesday, with most locations dropping back into the upper 70s and lower 80s for highs and low temperatures remaining around 60 degrees.
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.AVIATION /18Z THURSDAY THROUGH TUESDAY/... As of 1255 PM Thursday...
Shallow fog at INT/GSO this morning has dissipated, leaving fair skies at those sites, however sub-VFR cigs persist at this hour near and E of Hwy 1, including at RDU/RWI/FAY, a result of a steady influx of low level moisture moving NNE to SSW from E VA. Isolated patches of light rain are also noted along and E of I-95. This threat for patchy light rain will continue in the far E (RWI/FAY) through the rest of this afternoon, with a slow rise in cigs at RDU/RWI/FAY, such that VFR cigs are expected at these sites by about 19z-21z. VFR conditions will hold areawide through the midnight hour, then areas of sub-VFR stratus and patchy fog are expected to form across the N overnight, most likely impacting RWI/RDU with lower confidence at GSO/INT/FAY. RDU/RWI should trend to at least MVFR by 07z-09z, with a period of IFR conditions possible just before and around sunrise, while the remaining TAF sites may only briefly drop to MVFR. Cigs in the northeast CWA should then slowly lift and break up through the end of the TAF valid period. Overall confidence is not high, however, since the low levels will be gradually drying out, making low clouds and fog less likely. Surface winds will be mostly from the NE or N under 8 kts.
Looking beyond 18z Friday, once any lingering sub-VFR stratus in the northeast CWA dissipates in the early afternoon, central NC terminals should be mostly VFR 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. -GIH
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.RAH WATCHES/WARNINGS/ADVISORIES... None.
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SYNOPSIS...Hartfield NEAR TERM...Hartfield SHORT TERM...Green LONG TERM...Green AVIATION...Hartfield
NWS RAH Office Area Forecast Discussion