Area Forecast Discussion
Issued by NWS Goodland, KS
Issued by NWS Goodland, KS
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768 FXUS63 KGLD 290809 AFDGLD Area Forecast Discussion National Weather Service Goodland KS 209 AM MDT Wed May 29 2024 .KEY MESSAGES... - Chance for severe weather and flooding throughout the week. Confidence in specific hazards change each day, but a very active pattern is expected. - Potential for critical fire weather conditions Sunday and into early next week. High temperatures could also climb into the 90`s. && .SHORT TERM /THROUGH THURSDAY NIGHT/... Issued at 153 PM MDT Tue May 28 2024 Morning and early afternoon convection occurred along narrow band of 700 mb frontogenesis which has moved southeast of the area. Additional convection is expected later this afternoon and into this evening as a shortwave trough moves out of the Rockies. There is also a weakening cold front moving out of Nebraska and possible outflow boundary from earlier convection. CAMs show best chances for additional storms will generally be south of a Joes, Colorado, to Scott City, Kansas, line. Moderate surface based instability early in the evening will quickly weak by around 03z when storms will probably become elevated with persistent MUCAPE. Deep layer shear will also be strongest early in the evening before weakening with time. So all signs point to a marginal severe risk early, but storms weakening after about 03z. Mean precipitation amounts through 06z are around a quarter of an inch, but some locally higher amounts of a little over 1 inch will be possible according to HREF 90th percentile QPF. A few scattered showers and isolated thunderstorms may persist after midnight mainly in eastern areas with additional amounts of less than a tenth of an inch. Low temperatures will be in the 50s. Ridge axis moves east on Wednesday with a pronounced shortwave trough moving into the Rockies in the afternoon. Showers and thunderstorms will initiate on the Front Range and move across eastern Colorado in the afternoon, probably not reaching the Kansas border until after 00z. Most if not all of the area will be dry until then with high temperatures in the upper 70s to around 80. Broken line of showers and thunderstorms will then move west to east across the area Wednesday night. Initial line may have a hail/wind threat early in the evening before transitioning to mainly a wind threat further east later in the evening. 6-hour mean precipitation amounts are around a quarter of an inch through 06z, with some locally heavier amounts of 1 to 1.25 inches possible generally north of Interstate 70. Amounts between 06-12z will be lighter, though can`t completely rule out some local amounts in eastern areas approaching 1 inch. Low temperature will be in the 50s to around 60. Showers and thunderstorms may persist into Thursday morning as the upper trough axis and accompanying surface cold front slowly move through the area. Should see additional post frontal development during the afternoon as another vorticity lobe rotates around the main low in the northern plains. Not sure how much instability can recover given the morning clouds and precipitation, but there is some potential for severe storms with any clusters propagating off the higher terrain to the west, with the main hazard being wind. Deep layer shear tops out at around 30 kts which may limit more organized convective threat. However, as storms move further east Thursday night the 0-6 km winds diminish to 10 kts or less, suggesting slow storm motions. Mean 6-hour QPF through 06z for areas east of Highway 25 around a half inch but higher percentiles are between 1-2 inches. There is some concern for flooding given these parameters and antecedent rainfall the previous few days. High temperatures will be in the 70s and lows in the 50s. The pattern does not change much on Friday. Showers and thunderstorms linger in the morning, mainly in eastern areas, then redevelop in the afternoon with another wave rotating around the main upper low now in central Canada and low level upslope flow. Instability is weak to moderate, highest in Colorado, but there is an increase in deep layer shear to 40-50 kts, sufficient for a severe risk with any discrete cells in the afternoon and evening hours. However, QPF is much lower compared to previous days which may mitigate any additional flooding concerns. Not much change in temperatures with highs in the 70s and lows in the 50s. && .LONG TERM /FRIDAY THROUGH TUESDAY/... Issued at 205 AM MDT Wed May 29 2024 For the weekend and into next week, active weather is forecast with continued daily chances for storms and severe weather. Next week is beginning to look like we`ll see some of our hottest temperatures of the season so far in the 90`s. For Friday and Saturday, the area looks to be in a inbetween pattern with zonal flow on the back side of an upper trough. With this, temperatures are forecast to generally be in the 70`s and 80`s. A mix of clouds and afternoon/evening storm chances remain in the forecast as available moisture over the area is forecast to remain relatively high. Severe storms will likely be possible both days, but could be fairly limited or marginal as the forecast lack of synoptic forcing will likely limit storms to forming off the higher terrain in Colorado and moving east. For Sunday and the beginning of next week, the overall trend in guidance favors some ridging, but some smaller waves moving through the flow may keep us more zonal. As such, near to above average temperatures in the 80`s and 90`s are forecast along with continued daily chances for storms. That being said, chances are a bit lower compared to this current week as drier air may be able to move into the area if the flow takes on more of a southwesterly direction or if the ridging amplifies. This could shift storm chances more to the east where moisture would more likely remain available. May need to keep an eye out for critical fire conditions on Sunday as a smaller wave moves through and when temperatures are currently forecast to be into the 90`s. && .AVIATION /06Z TAFS THROUGH 06Z THURSDAY/... Issued at 1038 PM MDT Tue May 28 2024 Winds will become southerly overnight as moisture advection continues. Am watching for some patchy fog/stratus potential around sunrise due to the continued moisture advection, recently saturated boundary layer and light winds. At this time KGLD may be the only terminal affected. Winds will remain southerly throughout the day with sustained breezy winds around 20 knots continuing. Another round of storms perhaps severe moves into W Kansas after 00Z Thursday. Confidence isn`t as high at KMCK so will leave the mention out for now. && .GLD WATCHES/WARNINGS/ADVISORIES... KS...None. CO...None. NE...None. && $$ SHORT TERM...024 LONG TERM...KAK AVIATION...Trigg