textproduct: Hastings

KEY MESSAGES

- Through Wednesday afternoon: The forecast remains "guaranteed" dry, with the main/fairly minor issues being: 1) could there be a touch of late night/morning fog?...2) Are we aiming high enough on high temps? (widespread 80s especially Tuesday). - Wednesday night-Thursday night: while our official forecast remains MAINLY DRY, there are some limited "question marks" as a few models hint at spotty showers/thunderstorms as some weak lift/modest instability passes through.

- Friday daytime-Sunday: almost guaranteed dry weather returns as breezy south winds give temps another boost. Our going/official forecast is likely AT LEAST 5 degrees too cool for highs, as we'll probably see a lot more 80s than 70s (this is just a bit too far out in time to make significant adjustments to our "default" model blend/NBM).

- Sunday night-Monday: Low chances (mainly 20-30%) for showers/thunderstorms return to our forecast as a large-scale western U.S. low pressure system approaches our region. However, the typically-more-accurate and slower model solutions this far out in time suggest the main chances for rain could hold off until at least Tuesday. IF this system does slow, our highs for Monday might also be far too cool.

DISCUSSION

Issued at 302 PM CDT Mon Oct 5 2026

-- FORECAST CHANGES OF NOTE/BIG PICTURE COMMENTS/PRIMARY UNCERTAINTIES:

- As already touched on/alluded to in the KEY MESSAGES above, our three biggest forecast issues/uncertainties for the 7-day forecast as a whole are:

1) Could some spotty/sneaky shower/thunderstorm activity "ruin" what had been/has been a MOSTLY dry forecast between late Wed night-Thurs night? As of now, we have maintained a dry forecast for the vast majority of our forecast area (CWA), but this bears watching just in case there is enough lift/instability to generate at least spotty activity. Right now the NAM is the main primary model suggesting these chances, while the ECMWF and especially GFS/RRFS are less supportive.

2) How far might we be underdoing (aiming too cool) on high temps especially Friday-Sunday? As we've clearly seen over the last 3-4 days, our "default" multi-model blend (NBM) has really been struggling to go warm enough in this recent sunnier/drier air weather pattern, and more "raw" deterministic model data and "old school" numerical guidance strongly suggests that our official forecast is quite possibly AT LEAST 5 degrees too cool for Fri-Sun, as we seem primed to see more 80s vs. 70s (especially Fri-Sat). While we proactively adjust NBM temps especially in the shorter term (first few days), these periods are still a bit too far out in time for us to have much control over making adjustments, so for now this forecaster considers it a likely forecast weakness.

3) Although still too far out in time (6-8 days) to even begin thinking about providing "finer details", eventually we could see a return of more legitimate rain chances as a large-scale western U.S. low pressure system/trough emerges into the central states. As has been seen countless times in the "model world" over the years, the GFS is noticeably faster with the arrival of rain/possible thunderstorm chances (perhaps as soon as Sun night-Monday), while the slower (and often more accurate) ECMWF solution holds off rain/thunderstorm chances until more so Tuesday-Wednesday. As is typical, our current official forecast is a "middle ground" with rain chances arriving already Sun night-Monday, but only "iffy" 20-30% chances.

-- 7-DAY FORECAST CHRONOLOGICAL DETAILS (through Mon. Oct. 12, but heavily focused on these first 3-4 days): - CURRENT/RECENT WEATHER SCENE AS OF 2 PM: Although certainly on the breezy side with sustained southerly winds commonly 12-22 MPH/gusts 16-32 MPH (lightest in our east/strongest in our central/west), it's another virtually cloudless/sunny day with high temps on track to top out 77-79 most places, with a mainly southwestern spots probably tagging 80 briefly.

In the mid-upper levels, water vapor satellite/short-term model data confirm that our Central Plains region resides under broad west-northwesterly flow...directed between ridging over the southwestern U.S. and a large upper low/trough over southeastern Canada. At the surface, our breezy south winds are being driven by a tightening pressure gradient behind a surface high pressure axis centered over the eastern Midwest/Great Lakes (and that was over us 24 hours ago), and a High Plains lee trough to our west.

- THIS EVENING-OVERNIGHT: As benign northwesterly flow aloft persists, skies remain mostly clear and the forecast remains guaranteed dry. At the surface, breezes slacken from this afternoon's speeds, but remain generally southerly with sustained speeds commonly 5-15 MPH (overall-lighest in our far west toward sunrise in our far west toward sunrise as a weak trough axis/more westerly wind shift arrives). Literally the only possible "forecast issue" is for a narrow axis of least light/patchy fog to develop for a few hours along this trough axis primarily within Dawson County in our far west. Although this is something to keep an eye on, right now this appears to be a very limited concern for us (both likelihood of fog being truly dense and overall areal coverage...affecting only a fraction of our CWA at most). Low temps were nudged down very slightly, with mid-50s most places...and typical cooler spots (especially Valley/Greeley/Dawson counties) more so low 50s.

- TUESDAY DAYTIME: Although there will probably be a bit more in the way of high level cirrus drifting through here and there, the day will be dry and no worse than mostly sunny as a whole, under continued moisture-starved northwesterly flow. Compared to today, it will be several degrees WARMER but also LESS WINDY (a somewhat unusual combination for the fall season where warmer days often feature more wind). In short, the warmer airmass is advected in from the southwest/west/northwest...while the lighter winds will be due to a weaker pressure surface gradient. In fact, there is some uncertainty regarding "exact" wind direction through the day, as while speeds should generally only be around 10 MPH, direction will probably favor southwesterly in roughly the southeastern half of our CWA, while northern/western counties will probably turn more northerly behind a weak boundary. No matter what, highs are forecast to climb a solid 5-8 degrees warmer than today...most areas aimed between 83-87.

- TUESDAY NIGHT: Dry conditions persist, as a weak boundary gradually turns light winds to northerly and/or northwesterly as the night goes on. Like tonight, models (such as HRRR/RAP) at least weakly suggest that patchy fog could again develop late, but this time mainly in our far southeast counties where winds will be lightest toward sunrise (confidence too low for forecast introduction at this time). Low temps aimed similar to tonight most places (mid 50s), but a somewhat higher chance for upper 40s far north/west- central.

- WEDNESDAY-WED NIGHT: High confidence dry continues through the day and through at least the evening (through midnight). Daytime breezes again fairly light (around 10 MPH with some slightly higher gusts), but this time shifting from northerly to more easterly as surface high pressure passes to our north-through-east. High temps slightly cooler than Tuesday, with mainly upper 70s most Neb zones but still low-mid 80s along near and especially south of the KS border.

For late Wed night, the 12Z NAM (and to a lesser extent 12Z ECMWF) suggest some spotty showers/weaker thunderstorm activity COULD try developing along a weak low-level jet, but with a predominantly dry signal in other models have kept our forecast dry at this time (SPC is carrying some generic "general thunder" chances for our northern CWA at this time). Low temps again mainly mid 50s most areas.

- THURSDAY-FRIDAY: For Thursday daytime-night, we still cannot totally rule out spotty/weak convection, but our official forecast remains largely dry with somewhat higher chances focused mainly to our north-through-east. Temperature-wise, Thursday is a one-day slight cool-down (even if it stays dry), with highs more so mid- upper 70s most areas, but as southerly breezes return Friday strongly suspect our going highs also in the mid-upper 70s are likely several degrees too cool (look for these to trend up in later forecasts).

- SATURDAY-MONDAY: No point here in rehashing in length what has already been discussed above. In short, most of this time frame likely remains dry, breezy and several degrees warmer than our current official forecast suggests...especially if the slower/currently preferred ECMWF evolution of the western U.S. trough comes to pass.

AVIATION /00Z TAFS THROUGH 00Z TUESDAY/

Issued at 613 PM CDT Mon Oct 5 2026

For KGRI/KEAR Airports:

High confidence VFR conditions anticipated through the period with mainly clear skies and good VSBYS.

Expect gusty southerly winds to gradually diminish to near 12 KTS over the next hour or two...with models indicating a LLJ developing by 06/04Z, resulting in modest LLWS through the overnight hours. Generally south to southwesterly winds 10KTS or less are expected Tuesday as an area of surface high pressure fills in across central Nebraska promoting a weak pressure gradient and generally light south breezes less than 10 KTS.

GID WATCHES/WARNINGS/ADVISORIES

NE...None. KS...None.