Area Forecast Discussion
Issued by NWS Wilmington, NC
Issued by NWS Wilmington, NC
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957 FXUS62 KILM 222358 AFDILM Area Forecast Discussion National Weather Service Wilmington NC 758 PM EDT Sat Jun 22 2024 .SYNOPSIS... Temperatures and thunderstorm chances will increase over the next few days. A weak front will stall across the eastern Carolinas Tuesday, but should return inland Wednesday. Typical summertime weather is expected much of the coming week. && .UPDATE... Spotty showers with localized heavy rain have dissipated along the coast but a few continue inland across Lumberton and the Pee Dee region. These should quickly dry up this evening as the boundary layer stabilizes. Speed convergence within humid onshore wind at the coast has resulted in some low stratocumulus which may continue overnight. The biggest change with this forecast update was adjusting forecast low temps up 1-2 degrees, especially along the coast, where at least a few mph of onshore wind should continue through daybreak. A new wave of showers associated with tropical disturbance 91L may reach Georgetown and parts of the Grand Strand before 8 AM Sunday and I`ve nudged forecast PoPs up 10 percent in this area very late tonight. && .NEAR TERM /THROUGH SUNDAY/... Atlantic high pressure will prevail as a weak tropical disturbance near the GA coast slowly shifts northward and weakens. Lingering showers/isolated storms this evening will end due to loss of diurnal heating but additional showers could impact the coast late tonight where the best moisture convergence should occur. Increasing low- level winds should prevent much fog tonight but models suggest some could develop inland, especially in NC where low clouds are more likely. Coastal showers should transition inland Sunday with even a few rumbles of thunder possible. Severe storms are not expected but locally heavy rainfall will be possible which could lead to minor flooding. Lows tonight should be a bit above normal, generally in the lower to mid 70s except upper 70s at the coast. Highs Sunday should be close to normal near the coast but a bit above normal inland, ranging from the mid to upper 80s at the coast to lower to mid 90s inland. Although there is some uncertainty regarding how much dewpoints lower during the day, we think max heat indices will mostly fall below our Heat Advisory levels of 105 degrees. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/... A mid level trough and attendant cold front will move across Monday with expected good coverage of showers and thunderstorms late in the day. Still unsure of severe potential but with the trough some decent shear should be available along with good instability. Tuesday should be drier but can`t rule out isolated activity. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... Decent chance for showers and thunderstorms Thursday into Friday via decent agreement with the global guidance. This as another cold front/mid level trough combination move across. BEyond this nothing really special or noteworthy with temperatures in expected ranges. && .AVIATION /00Z SUNDAY THROUGH THURSDAY/... Inland convective showers should quickly dissipate with little potential impact at KFLO or KLBT. Along the coast, humid onshore winds are helping develop low stratocumulus clouds along the coast which have a low-to-moderate potential for occasional MVFR ceilings at KMYR and KCRE this evening and overnight. As this humid air moves inland, there is a moderate-to-high potential for MVFR ceilings to develop at KFLO and KLBT after 08z Sunday. These ceilings should lift above 3000 feet AGL between 13-15z Sunday morning. The remnant swirl from tropical disturbance 91L will move north along the coast Sunday, adding to shower and thunderstorm potential. Chances of convective impacts are highest along the coast during the morning between 12-17z, shifting inland between 17-22z. Extended Outlook... VFR to prevail outside of the periodic MVFR/IFR from diurnally-induced showers/storms and morning low clouds/fog. && .MARINE... Through Sunday... The central Carolina waters will remain between Atlantic high pressure to the east and an inland trough. Although winds/seas will increase a bit Sunday due to the increasing pressure gradient we don`t expect the need for a Small Craft Advisory. Sunday Night through Thursday... Expect a period of stronger southwest winds Monday in a range of 15-20 knots ahead of a cold front. A brief period of weak offshore winds early Tuesday will be followed by a typical summer pattern of south to southeast winds. Significant seas of 2-4 feet can be expected. && .TIDES/COASTAL FLOODING... Other - Rip Currents: A high risk of rip currents is in effect today for Pender and New Hanover County Beaches. Moderate rip current risk across Horry and Georgetown County Beaches. Brunswick County Beaches should see weak rip current activity today. The elevated rip current activity will be aided by the 8+ second period onshore waves and the enhanced tidal range due to the current full moon. Wind speeds will not be as strong like the past several days, and as a result could see weak to possibly moderate longshore currents from the southerly winds this afternoon and evening. && .ILM WATCHES/WARNINGS/ADVISORIES... NC...High Risk for Rip Currents until 8 PM EDT this evening for NCZ106- 108. SC...None. MARINE...None. && $$ SYNOPSIS...ILM UPDATE...TRA NEAR TERM...RJB SHORT TERM...SHK LONG TERM...SHK AVIATION...TRA MARINE...RJB/SHK TIDES/COASTAL FLOODING...