Area Forecast Discussion
Issued by NWS Hastings, NE
Issued by NWS Hastings, NE
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174 FXUS63 KGID 222330 AFDGID Area Forecast Discussion National Weather Service Hastings NE 630 PM CDT Sat Jun 22 2024 .KEY MESSAGES... - Flooding continues in some areas north of I-80 as a result of heavy rainfall Friday night. - Isolated to widely scattered thunderstorms expected Sunday afternoon/evening and again Monday evening. Marginal risk for severe weather both of these days. - Advisory-level heat (heat index 105+) is possible for portions of the area both Monday and Tuesday. - More widespread chances for rain and thunderstorms return mid to late next week. && .DISCUSSION... Issued at 330 PM CDT Sat Jun 22 2024 A cold front has moved through the forecast area, ushering in breezy northwest winds and some pesky cloud cover. Despite this, temperatures have still risen to near our climatological normals in most locations (90s and low 90s). Skies continue to clear this evening, and any thunderstorm development should stay to our south...which is good news for areas that are still experiencing runoff flooding from last night. A warning trend starts on Sunday as upper ridging builds in from the west. Southwestern portions of the area could push 100 degrees, and 90s are expected for most of the rest of the area. CAMs show a few thunderstorms developing mid to late afternoon over western portions of the area, but I expect coverage to remain pretty isolated due to capping/warm midlevel temperatures. Any storms that do develop would be able to tap into MLCAPE around 2000 J/kg and effective shear of 30-40kts and potentially produce some severe hail/wind. Monday still appears to be the warmest day of the week, with the entire area making a run into the upper 90s and low 100s. Heat index values may reach/exceed advisory criteria (105 degrees) in some spots. Again, there is a chance for a few spotty storms, some of which could be marginally severe, late Monday afternoon through the evening. A front moves into the region on Tuesday, but timing of this feature is still somewhat uncertain. The NBM has trended warmer compared to 24 hours ago, and parts of our area (especially KS) could see another day of 105+ heat indices. Wednesday through Friday will be "cooler" as a series of shortwave break down the upper ridge. That said, highs are still expected to reach/exceed climo for much of the area each of these days. These shortwaves will also bring us better chances for more widespread rain/thunderstorms, especially Thursday night through Friday night. && .AVIATION /00Z TAFS THROUGH 00Z SUNDAY/... Issued at 618 PM CDT Sat Jun 22 2024 For KGRI/KEAR Airports: VFR conditions are expected through the TAF period, with the few clouds still remaining at 3k ft to 4k ft AGL expected to clear out of the area this evening. Clear skies are expected at the terminals from late this evening through the end of the TAF period. That being said, there is a low chance (10-20%) of patchy fog reducing visibility to around 4SM to 5SM between 11Z-13Z Sunday morning (mainly at KGRI), but as chances are so low, did not include that in the TAFs. Northerly winds will diminish to 8 kts or less this evening before becoming light and variable tonight. Winds will become southerly Sunday morning, and should generally remain 8 kts or less. During the afternoon Sunday, southerly winds will increase to 9-12 kts. && .GID WATCHES/WARNINGS/ADVISORIES... NE...None. KS...None. && $$ DISCUSSION...Mangels AVIATION...Hickford