Area Forecast Discussion
Issued by NWS Wilmington, NC

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096 FXUS62 KILM 260706 AFDILM Area Forecast Discussion National Weather Service Wilmington NC 306 AM EDT Thu Jun 26 2025 .SYNOPSIS...
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Temperatures will remain above normal for the next several days but not as hot as the past few. Thunderstorms will favor the afternoon hours and only be isolated to widely scattered. Wetter weather will precede a cold front next Tuesday and Wednesday.
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&& .NEAR TERM /THROUGH TONIGHT/...
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The ridging that had produced the significant heat earlier in the week continues to lose strength today. At the same time a 5h low will drift north along the length of the FL Peninsula. Temperatures remain above normal today, but the heat and humidity won`t be quite as extreme as it has been. No plans for any heat products today with heat index coming in under 105F across the forecast area. Forecast soundings still show an atmosphere with a fair amount of instability. Mid-level lapse rates are not nearly as explosive as they were on Wed, barely exceeding 6C/km and there is a lot of dry air above 15k ft. Despite these limitations think there will be some storms that are able to develop this afternoon. Warm temps and dewpoints around 70 will keep SBCAPE over 2k J/kg with pockets of SBCAPE in excess of 4k J/kg. The sea breeze will once again help develop convection and there are likely to be left over surface boundaries as well as the potential for differential heating from lingering debris cloud. There may also be a bit of weak PVA arriving during the early to mid-afternoon hours associated with the 5h low over FL. Can see hints of this on water vapor imagery north of the Bahamas as a band of broken clouds that emanates from the upper low. Confidence is a good bit lower than yesterday with respect to storm coverage given the aforementioned limitations/slightly less favorable environment, hence have chance pop for the area today. Storm motion will be more of an east to west today vs the unusual north-northeast to south-southwest seen on Wed. As previously mentioned temps above normal continue today and tonight, but by a paltry 3-5 degrees as opposed to the 10+ degrees the last few days. Rain chances come to an end once diurnal storms end or push west of the forecast area this evening. Leaving mostly clear skies overnight. Light winds may allow for some patchy fog, depending on how much rain falls today, but not expecting significant fog issues.
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&& .SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/...
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The upper low from the short term dissipates over the weekend leaving behind light flow through most of the column. Once again thunderstorms will be focused along and just west of the seabreeze. Afternoon highs will remain elevated a few degrees above normal and pinpointing favored locales for convection will be tricky given forcing being limited to the mesoscale and storm motion slow and erratic. Changes start taking shape Tuesday into Wednesday with the approach of a surface cold front and mid level trough.
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&& .LONG TERM /SATURDAY THROUGH WEDNESDAY/...
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The upper low from the short term dissipates over the weekend leaving behind light flow through most of the column. Once again thunderstorms will be focused along and just west of the seabreeze. Afternoon highs will remain elevated a few degrees above normal and pinpointing favored locales for convection will be tricky given forcing being limited to the mesoscale and storm motion slow and erratic. Changes start taking shape Tuesday into Wednesday with the approach of a surface cold front and mid level trough.
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&& .AVIATION /07Z THURSDAY THROUGH MONDAY/... High confidence in widespread VFR anticipated into Thursday afternoon before some brief storm related MVFR/IFR may become an issue. Low level moisture may lead to brief periods of MVFR fog at any of the terminals pre-dwan, but wind/mixing should keep duration of MVFR at any one site brief. Light westerly flow this morning will come back around to south-southeast during the day with somewhat enhanced speeds along the coast due to the sea breeze. Anticipate another round of afternoon/evening storms, but with coverage less than seen on Wednesday. Not anticipating much of an impact for the coastal terminals with storms moving from east-southeast to west- northwest this afternoon. Convection that develops along the sea breeze will move inland and the coastal terminals will be east of the sea breeze by the time storms can develop. Carrying PROB30 for FLO/LBT given limited coverage and some uncertainty with respect to the actual timing of storms. Combination of storms moving west and decreasing instability late in the day will bring an end to storms around 00Z. Extended Outlook...Mainly VFR with brief MVFR/IFR possible in the afternoon and evening. && .MARINE...
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South to southwest winds across the waters today and tonight with enhancement to 10-15 kt in the afternoon in response to the sea breeze. Strength of the southerly flow remains a little more elevated tonight than it has during past nights due to a slightly stronger gradient between the more defined Piedmont trough and the Bermuda High. The extended duration of 10-15 kt winds will allow 3 ft seas to creep into the outer waters later in the forecast period. The uptick in winds and the increased duration will keep the southerly wind wave dominant over a southeast swell. Friday through Monday... Our most common summertime marine winds expected through the period as flow remains out of the SW due to the Bermuda High. The southwesterly wind waves will dominate early on but the SE swell energy will increase late in the period.
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&& .ILM WATCHES/WARNINGS/ADVISORIES... NC...None. SC...None. MARINE...None. && $$ SYNOPSIS...ILM NEAR TERM...III SHORT TERM...MBB LONG TERM...MBB AVIATION...ILM MARINE...ILM