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Area Forecast Discussion
Issued by NWS Dodge City, KS
Issued by NWS Dodge City, KS
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582 FXUS63 KDDC 152339 AFDDDC Area Forecast Discussion National Weather Service Dodge City KS 639 PM CDT Sat Jun 15 2024 .KEY MESSAGES... - Expect hot afternoons with strong south winds each day, Saturday through Tuesday. - Isolated thunderstorms are possible each afternoon and evening, with marginally severe wind and/or hail possible. - A cold front is expected to bring cooler afternoons and increased shower and thunderstorm coverage at midweek. && .DISCUSSION... Issued at 200 PM CDT Sat Jun 15 2024 A weak shortwave trough was crossing SW KS at midday, with associated lift generating broken midlevel clouds, and a few showers and thunderstorms. Additional scattered thunderstorms are expected to develop this afternoon through this evening, as strong south winds maintain modest instability. CAM consensus suggests coverage will favor the central/eastern zones through evening, and that is how the chance category pops were arranged. Moderate bouyancy and weak shear will keep storms rather disorganized, but certainly some marginally severe wind/hail are probable with the strongest cells through early evening, per SPC marginal 5% wind/hail probability. South winds will gust to near 35 mph this afternoon, with afternoon temperatures largely in the lower 90s. Elevated south winds will provide a warm early summer night tonight, with all locations easily remaining in the 60s through sunrise Sunday. All models show strong warming Sunday, with a net warming of 5-6C at 850 mb over Saturday, supporting afternoon temperatures in the mid to upper 90s. Given recent rainfall and a lack of more pronounced SWly downslope, most locations will remain below 100 Sunday. South winds will again be strong; included the 90%ile of the NBM for the wind grids, with 20-30 mph winds common. 990 mb low pressure near Denver will support a pressure gradient supportive of 40 mph gusts. Most of Sunday will be dry for most locations. 12z NAM develops strong instability Sunday afternoon with MUCAPE near or above 3000 J/kg, but a triggering mechanism is less than obvious. NAM suggests moisture convergence along the surface trough/dryline may be sufficient for initiation, favoring the western zones, but kept pops necessarily now, near 20%, for now. Synoptic longwave pattern changes little over North America Monday and Tuesday, with broad troughing over the northern Rockies, and very strong midlevel high pressure over the eastern US. Strong southerly winds and moisture transport from the Gulf of Mexico will be maintained. With instability and a dryline or surface trough available, at least isolated thunderstorms are probable at peak heating both Monday and Tuesday. Dewpoints will easily hold in the 60s east of the dryline (along the KS/CO border) each afternoon, supporting moderate to strong instability, but forcing is nebulous, will rely on the mesoscale, and is impossible to finetune this far out. This synoptic pattern also favors strong to intense south winds, with pressure gradients on Monday in particular supporting gusts as high as 50 mph. Several 12z GEFS members and 12z GFS show surface low pressure as low as 982 mb near Denver Monday afternoon, resulting in a mslp gradient of near 15 mb across the DDC CWA. Some of this stronger guidance suggests a high wind watch may be required Monday afternoon/evening. Continued to use the 90%ile of the NBM for these wind/wind gust grids. South winds are expected to reach their peak intensity Monday, and with the excellent mixing and a hot well mixed boundary layer, temperatures will soar through the 90s Monday afternoon. Models to varying degrees depict a cold front making progress southward into/through Kansas Tuesday, which will 1) begin a cooling trend in afternoon temperatures, 2) decrease the magnitude of the winds, and 3) improve shower and thunderstorm coverage. NBM shows a relative max in POPs on Tuesday night, and these were retained, when MCS development is most probable with the frontal boundary in the vicinity. 12z GEFS probability of QPF > 0.10 inch is already as high as 80% during this favored Tuesday night timeframe, and 12z MEX pops are already well into the likely category. Behind this cold front and thunderstorm complex, cooler afternoon temperatures in the 70s are expected Wednesday. && .AVIATION /00Z TAFS THROUGH 00Z MONDAY/... Issued at 636 PM CDT Sat Jun 15 2024 Aviation weather will be fairly quiet, although at the onset of this TAF period, widely scattered thunderstorms were occurring across portions of southwest Kansas. None of the storms were threatening any of the four terminals DDC, GCK, LBL, and HYS, however we will continue to monitor DDC and HYS in particular for possible amendment this evening. Otherwise, weather will be fairly tranquil with south winds continuing along with VFR flight category. Winds will increase in speed again on Sunday, becoming sustained at around 20 to 25 knots at times with gusts 30 to 35 knots. && .DDC WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Turner AVIATION...Umscheid