Area Forecast Discussion
Issued by NWS Wilmington, OH
Issued by NWS Wilmington, OH
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038 FXUS61 KILN 222000 AFDILN AREA FORECAST DISCUSSION National Weather Service Wilmington OH 400 PM EDT Sat Jun 22 2024 .SYNOPSIS... Heat wave continues today before a brief respite arrives Sunday into Monday with slightly cooler and drier air, especially on Monday. A few showers and storms are expected on Sunday, during the morning into mid afternoon. By late Tuesday, warmer and much more humid air will quickly build back into the region, with chances for storms returning Tuesday night through Wednesday. Drier and cooler conditions will then return for the last part of the workweek. && .NEAR TERM /UNTIL 8 AM SUNDAY MORNING/... Heat wave continues across the area today. Mid and upper level ridge stretches from the Southern Plains across the Ohio Valley into the Mid Atlantic. Scattered to broken cumulus clouds have developed with the afternoon heating. This ridge will inhibit the development of widespread convection, although a renegade shower or storm can not be ruled out into early evening - mainly east of I-71. Cumulus clouds will dissipate and any isold showers/storms with the loss of heating this evening with some mid/high level clouds overspreading the area later tonight. Progressive mid level shortwave to track thru the Great Lakes overnight and Sunday. Pre-frontal showers and embedded thunder from a mid deck will be possible toward sunrise across the northwest. This pcpn activity should be in a weakening trend as it moves across the area. The increase in clouds, moisture and southwest winds staying up will translate to a very warm night. Lows only dip into the mid 70s for many areas. && .SHORT TERM /8 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... Progressive mid level shortwave to track thru the Great Lakes Sunday. This will drive a surface cold front thru the area Sunday afternoon. Pre-frontal showers and embedded thunder in a weakening trends will be possible Sunday morning. An increased threat for thunderstorms will develop during the late morning into the afternoon with the approach of the cold front. Model solutions continue to trend faster with this front. Moderate instability develops ahead of the front. Shear looks to be unidirectional with bulk shear of 20-25 kts. A few of the stronger storms could produce strong to damaging winds with DCAPE values forecast to be 1000-1200 J/KG. This potential for severe weather will generally be along and east of I-71. Storm chances diminish from northwest to southeast late in the day as drier air filters in from the northwest with the passage of the front. High temperatures Sunday will be tricky given the frontal passage. Forecast highs to range from the mid 80s northwest to near 90 southeast. Northwest flow develops Sunday night with high pressure nosing into the area offering cooler and drier conditions. Low temperatures generally in the lower and middle 60s. && .LONG TERM /MONDAY THROUGH SATURDAY/... High pressure and dry air are forecast for Monday into Tuesday. The threat for showers begins late Tuesday ahead of a cold front. Carrying likely to categorical pops for showers and thunderstorms Wednesday with frontal passage. High pressure settling over the Great Lakes will provide dry weather Thursday and Friday. The next front may bring a few more showers on Saturday. Temperatures fluctuating in relation to frontal position will begin with highs in the mid and upper 80s on Monday, rising back into the 90s Tuesday under a surge of warm advection ahead of the first cold front. Readings slip a few degrees to around 90 on Wednesday thanks to cloud and precip along the front. Highs fall back to the 80s Thursday in cold advection behind the front, before rising back into the 90s Friday and Saturday in another round of warm advection ahead of the second cold front. && .AVIATION /20Z SATURDAY THROUGH THURSDAY/... Mid level ridge remains across the Ohio Valley today which will inhibit the development of widespread convection. VFR conditions this afternoon into tonight with scattered to bkn cumulus clouds around 5000 feet. A renegade shower or storm can not be ruled out - mainly east of I-71 but coverage would be so low and short lived that no mention is in the TAF forecast at this time. Cumulus clouds will dissipate with the loss of heating this evening with some mid/high level clouds overspreading the area after 06Z tonight. Progressive mid level shortwave to track thru the Great Lakes overnight and Sunday. This will drive a surface cold front thru the area Sunday afternoon. Pre-frontal showers and embedded thunder from a mid deck will be possible toward sunrise Sunday. This pcpn activity should be in a weakening trend as it moves across the area. Have included a VCSH mention to account for this threat toward 12Z. An increased threat for thunderstorms will develop during the late morning into the afternoon with the approach of the cold front. At this time have included a mention of VCTS with continued VFR ceilings but can not rule out the possibility of MVFR ceilings or lower in storms. Southwest winds at 10-12kts this afternoon will drop to less than 10 kts this evening and then gradually increase toward sunrise Sunday as the pressure gradient tightens with the approach of the front. Expect southwest winds 10-15 kts with gusts up to 22 KTs Sunday before shifting to the northwest late in the day. OUTLOOK...Thunderstorms possible on Sunday afternoon and late Tuesday through Wednesday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...Heat Advisory until 8 PM EDT this evening for OHZ026-034-035- 042>046-051>056-060>065-070>074-077>082-088. KY...Heat Advisory until 8 PM EDT this evening for KYZ089>100. IN...Heat Advisory until 8 PM EDT this evening for INZ050-058-059- 066-073>075-080. && $$ SYNOPSIS...AR NEAR TERM...AR SHORT TERM...AR LONG TERM...Coniglio AVIATION...AR