Aikyam-Lab/Synoptic-Bench huggingface dataset:
1105 AM CDT Mon Sep 29 2025 - Breezy winds return this afternoon - Dry and warm conditions through the workweek - Small probability (10-20%) of rain in the later part of the weekend 07Z upper air analysis shows a large anticyclone centered near the Great Lakes with a large ridge over the eastern CONUS and a nearly stationary open wave trough approaching the four corners region. At the surface a weak lee side trough is located in eastern Colorado with a strong high pressure centered in southern Illinois. Today as the upper trough enters into Colorado and New Mexico more upper level Pacific moisture will stream into western Kansas through the day and we should see a thicker mid and high level cloud deck.
The large blocking pattern across the central US will continue to dominate sensible weather over Iowa throughout this week. Late tonight and into Tuesday the western US trough will sink towards the area, increasing convergence over western and northern Iowa with a narrow moisture plume. Steady southerly flow through the week will help keep temperatures in the mid to upper 80s, 10-15+ degrees above seasonal averages which are in the low 70s this time of year. Precipitation chances return this weekend as the western trough finally shifts east, however uncertainty remains in terms of timing and placement at this time range and will depend in some part on how the Atlantic systems evolve.
1204 PM CDT Mon Sep 29 2025 (Rest of Today and Tonight) The Tennessee Valley sits underneath an upper level trough which is in between high pressure over the southern Plains and two tropical cyclones over the Atlantic.
Upper trof axis was positioned from the TN Valley to the southeast U.
Strong mid-upper blocking ridge of 582-588 dam is forecasted over the Central Great Lakes region throughout the week and first half of the upcoming weekend.
No changes needed to current forecast, with the Pacific cold front still slated to reach the OR/ID around 6 PM MDT and shift eastward across our Idaho zones during the night. Also, 6 to 12 degrees cooler Tuesday compared to today. Cold frontal passage around 02Z with thunderstorms, followed by several hours of light to moderate rain, decreasing Tue/07Z.
Tonight through the weekend: For the most part, high pressure anchored over the eastern CONUS will be in control of our weather through the remainder of the work week, and no significant frontal passages are expected. The upper level trough that is helping to keep what is currently Tropical Storm Imelda off the southeast coast could bring some very light convective rainfall later this week (mainly Wed/Thu afternoons), but rain chances overall will remain low. Confidence is high that we will see drier and slightly cooler air advect into our region on the left side of "Imelda" by late in the week.
1254 PM EDT Mon Sep 29 2025 High pressure will lead to dry and mild conditions through the week.
- Hottest day of the week today, trending cooler thereafter. Brusda /Issued 811 AM MDT Mon Sep 29 2025/ - Meteorological Overview: Upper level ridging ahead of a Pacific trough is beginning to shift eastward, away from the region early this morning. A leading wave ejecting out of the main troughing setting up just off the Pacific NW coastline today will result in scattered showers and thunderstorms this afternoon into tonight, mostly across Southwest Montana and along the Continental Divide. Additional rounds of showers and thunderstorms (Mainly in the late afternoon and evening) look to develop through much of the rest of the week as weak disturbances continue to eject from the Pacific NW troughing.
152 PM EDT Mon Sep 29 2025 A large area of high pressure remains over the northeast and mid Atlantic through next Monday. Aside from this, only a dry cold front passage is expected this Tuesday into Tuesday night. High pressure will be in place with high/thin clouds continuing to stream in from the south. However, still blended in cooler MAV/MET MOS for low temperatures over the northernmost zones as this would be the area where the cloud cover probably isn't as thick. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area Tuesday into Tuesday night with a cooler airmass to follow.
144 PM EDT Mon Sep 29 2025 High pressure will guarantee fair dry weather through the entire week and into the coming weekend. A dry cold front will bring a more seasonable airmass around midweek with some risk for nocturnal frost at the higher elevations.
In the meantime, this low will circulate a pair of cold fronts through the region and make for rounds of beneficial wetting rains across our mountain zones, with light rain expected to occur across the Basin and adjacent valleys. Scattered showers will occur elsewhere across the lower elevations this evening.
Upper level ridging will be the main player for the regions weather as it settles across the Ohio Valley this week. For the weekend, the ridge starts to break down a bit with a subtle disturbance across the northern Gulf coast. Surface ridging will dominate as high pressure extends across the Mid Atlantic and northeast. High temperatures look to remain above normal with highs in the low to mid 80s. High pressure to the north will keep a northeasterly flow in place up to 8 knots, becoming calm tonight.
-Additional opportunities for scattered precipitation exist through the remainder of the week - Meteorological Overview: An upper-level trough, extending south from a Gulf of Alaska low, will gradually move inland this week. By late week, the upper low center will reorganize offshore of the Pacific Northwest. Southerly flow aloft, preceding the trough, will drive afternoon temperatures significantly above seasonal averages today.
Meanwhile, moderate to fresh northwest to north breezes are observed along our offshore observation stations with the higher magnitudes unsurprisingly found in the northeast portion of our area closer to Imelda. With Imelda and Humberto moving away by mid-week, high pressure over the Eastern Seaboard will slide slowly eastward into the western North Atlantic. High pressure over the Eastern Seaboard will slowly slide eastward into the western North Atlantic, with mainly gentle northwesterly breezes eventually veering to the northeast to east for the middle to latter part of the work week.
Cloudy skies will keep morning temperatures warmer in the 60s to low 70s.
Otherwise, overnight lows will continue to range in the low to mid-60s, and highs tomorrow will range in the mid to upper-80s.
As been the trend, went ahead and bumped high temperatures up a few degrees from NBM as observed highs the last few days have been running warmer compared to guidance. The forecast remains dry with warmer than normal temperatures through the forecast period. with highs in the low to mid 80s and overnight lows in the mid/upper 50s to near 60 at times.
236 PM EDT Mon Sep 29 2025 A cold front will pass through tomorrow completely dry and cloudless, but it will drop temperatures by around ten degrees. The cooler airmass will persist through mid-week, and patchy frost is expected in a lot of places overnight. High pressure builds down from the north Tuesday and Tuesday night, bringing with it a cooler and drier airmass. Highs will be around ten degrees cooler tomorrow due to the front passing through. While temperatures will drop into the 30s and 40s most places tomorrow night, continuing wind from the advection and some possible cloud cover should prevent much frost formation, even in areas that fall to around freezing.
1251 PM MDT Mon Sep 29 2025 - Showers and storms increasing with the peak tonight - More precipitation coming through the rest of the week - Much cooler temperatures on the way Showers and thunderstorms will peak tonight/early Tuesday, with bulk of moisture falling across the central mountains. There is a bigger threat of thunder before midnight, which lends some credence toward the higher end amounts. 10", but the overall risk is on the low end of things. It will be noticeably cooler tomorrow, with highs only in the 50s and 60s.
146 PM EDT Mon Sep 29 2025 Dry weather is expected through the week with high pressure in control. This will mute high temperatures a few degrees across most of the area, though our far eastern Ohio counties should remain on the fringes of the cloud shield and get a few degrees warmer.
Meanwhile, a broad trough encompasses much of the western third of the Lower 48 with a few subtle embedded waves producing nothing more than mid to high cloud cover in the N Plains given a dry sfc layer in play. This is supporting a "backdoor cold front" which isn't much more than a northerly wind shift across northern Lake Superior at this point. Low temps fall to the low 50s to mid 40s.
(Tonight) There is an upper level trough situated over the Tennessee Valley resulting in calm weather this evening through the early morning on Tuesday. Temperatures tonight are expected to fall to the lower 60s with a few places in Southern middle TN experiencing upper 50s.
Water vapor imagery this afternoon displays a broad mid- to upper- level ridge over the east-central CONUS with troughing pushing onshore over the Pacific Northwest. At the surface, a broad region of high pressure anchored over the Great Lakes region/Ontario overspreads much of eastern NE and southwest IA, bringing another calm, mostly clear afternoon. Henceforth, highs are expected to take a small dip into the low 80s on Tuesday. Through the remainder of the work week, above average temperatures will continue with highs generally in the upper 80s, though a few spots may hit the low 90s. A pattern shift will come this weekend as a cutoff low tracks across the Four Corners region and into the central Plains, helping to break down the ridge in place and bring troughing back to the area.
129 PM EDT Mon Sep 29 2025 High pressure will result in a prolonged period of dry weather across the area through the entire week.
724 PM EDT Mon Sep 29 2025 High pressure will result in a prolonged period of dry weather across the area through the entire week.
There will be an expansion and strengthening of high pressure over northern Ontario tonight into Tuesday. Strong mid-upper blocking ridge of 582-588 dam is forecasted over the Central Great Lakes region throughout the week and first half of the upcoming weekend.
Cloudy skies will keep morning temperatures warmer in the 60s to low 70s. /NEW/ /00z TAFs/ A broad shield of cirrus cloudiness will continue to spill eastward across North Texas this evening, in advance of an upper level trough located over the Southern Rockies. There is some mid to upper level forcing for ascent ahead of this trough, and moisture is sufficient to produce some very light radar returns across Western North Texas. This activity will progress eastward toward the I-35 corridor this evening, but with moisture extremely limited in the lowest 10kft of the atmosphere, none of this precipitation will reach the ground.
742 PM EDT Mon Sep 29 2025 High pressure to the north will combine with the circulation around Tropical Storm Imelda to bring a cool and moist northeast flow to the region into Tuesday.
703 PM EDT Mon Sep 29 2025 High pressure will lead to continued dry and warm conditions through the week.
Upper level ridging will be the main player for the regions weather as it settles across the Ohio Valley this week. For the weekend, the ridge starts to break down a bit with a subtle disturbance across the northern Gulf coast. Surface ridging will dominate as high pressure extends across the Mid Atlantic and northeast. High temperatures look to remain above normal with highs in the low to mid 80s. Strong high pressure at the surface and aloft dominates the flight weather this package.
527 PM MDT Mon Sep 29 2025 - Another passing trough on Tuesday will bring more showers and thunderstorms to the elevations of western Colorado and eastern Utah.
- Much cooler temperatures on the way. There is a bigger threat of thunder before midnight, which lends some credence toward the higher end amounts. 10", but the overall risk is on the low end of things. It will be noticeably cooler tomorrow, with highs only in the 50s and 60s.
728 PM EDT Mon Sep 29 2025 Dry weather is expected through the week with high pressure in control. This will mute high temperatures a few degrees across most of the area, though our far eastern Ohio counties should remain on the fringes of the cloud shield and get a few degrees warmer.
947 PM EDT Mon Sep 29 2025 High pressure will guarantee fair dry weather through the entire week and into the coming weekend. A dry cold front will bring a more seasonable airmass around midweek with some risk for nocturnal frost at the higher elevations.
Wind is still the headlining feature of our weather as fresh breezes out of the northwest have been holding steady near 15 mph along the Lower and Middle Keys, and 15 to 20 mph along the Upper Keys. Automated observations along the Keys show temperatures in the mid 80s, except in the lower 80s in the Upper Keys where a steady line of light showers has kept the air cooler. High pressure over the Eastern Seaboard will slowly slide eastward into the western North Atlantic, with mainly gentle northwesterly breezes eventually veering to the northeast to east for the middle to latter part of the work week.
552 PM EDT Mon Sep 29 2025 High pressure will guarantee fair dry weather through the entire week and into the coming weekend. A dry cold front will bring a more seasonable airmass around midweek with some risk for nocturnal frost at the higher elevations.
832 PM EDT Mon Sep 29 2025 The low-topped scattered showers activity that developed earlier has mostly tapered off at this time with latest KTBW radar imagery showing just a few isolated light echoes drifting southward at this time.
653 PM CDT Mon Sep 29 2025 (Tonight) There is an upper level trough situated over the Tennessee Valley resulting in calm weather this evening through the early morning on Tuesday. Temperatures tonight are expected to fall to the lower 60s with a few places in Southern middle TN experiencing upper 50s.
The western edge of the high cloud shield around the outskirts of the circulation of Tropical Storm Imelda was cutting across the Ohio River as evinced by GOES-R satellite imagery, and visible from at least most lowland locations. With high pressure at the surface and aloft the area is widely supported by fair weather and sunny skies although the cirrus shield from Tropical Storm Imelda is invading the area from east to west across much of West Virginia. During this period high pressure will dominate as an impressive Omega Block pattern moves in directly overhead of our region.
646 PM EDT Mon Sep 29 2025 - Much above normal temperatures to continue on Tuesday with highs in the low to mid 80s.
* Much cooler morning low temperatures possible during the weekend with readings in the 20s and 30s. Southwest flow aloft out ahead of an upper level upper trough over the eastern Pacific and just off the coast of the western United States. The activity is expected to increase during the overnight hours as a cold front is poised to move through the area late tonight into Tuesday. Precipitation amounts look quite robust with this feature with some of the higher amounts are situated across portions of southwestern Lander and northwest Nye counties where a half inch to an inch of rainfall is possible.
732 PM EDT Mon Sep 29 2025 A large area of high pressure remains over the northeast and mid Atlantic through next Monday. Aside from this, only a dry cold front passage is expected this Tuesday into Tuesday night. High pressure will be in place with high/thin clouds continuing to stream in from the south. However, still blended in cooler MAV/MET MOS for low temperatures over the northernmost zones as this would be the area where the cloud cover probably isn't as thick. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area Tuesday into Tuesday night with a cooler airmass to follow.
323 PM MDT Mon Sep 29 2025 - Another passing trough on Tuesday will bring more showers and thunderstorms to the elevations of western Colorado and eastern Utah.
Showers will linger into the early morning hours, especially in the lower basins and into the northern Blue Mountains with generally dry weather through early Tuesday afternoon. In the meantime, this low will circulate a pair of cold fronts through the region and make for rounds of beneficial wetting rains across our mountain zones, with light rain expected to occur across the Basin and adjacent valleys. Scattered showers will occur elsewhere across the lower elevations this evening.
Temperatures ranged from the low-mid 60s in the valleys and decoupled sites to the upper 60s and lower 70s elsewhere. Lows tonight should be slightly warmer than last night with readings generally in the low-mid 50s in the decoupled areas with upper 50s to the lower 60s elsewhere. As been the trend, went ahead and bumped high temperatures up a few degrees from NBM as observed highs the last few days have been running warmer compared to guidance. The forecast remains dry with warmer than normal temperatures through the forecast period. with highs in the low to mid 80s and overnight lows in the mid/upper 50s to near 60 at times.
610 PM CDT Mon Sep 29 2025 Upper trof axis was positioned from the TN Valley to the southeast U.
Upper troughing was noted over the western states, courtesy of an upper low off of the Pacific-NW coast. Mean upper heights were in place over the SE, partially from the remnants of east coast troughing and the presence of Hurricane Humberto and Tropical Storm Imeda. Earlier daytime heating helped to raise area high temperatures from the lower 80s higher elevations to mid/upper 80s elsewhere.
Otherwise, high pressure continues to hold sway across the majority of the area. /DL/ Tonight through the weekend: For the most part, high pressure anchored over the eastern CONUS will be in control of our weather through the remainder of the work week, and no significant frontal passages are expected. The upper level trough that is helping to keep what is currently Tropical Storm Imelda off the southeast coast could bring some very light convective rainfall later this week (mainly Wed/Thu afternoons), but rain chances overall will remain low. Confidence is high that we will see drier and slightly cooler air advect into our region on the left side of "Imelda" by late in the week.
706 PM EDT Mon Sep 29 2025 A cold front will cross the area tonight.
625 PM CDT Mon Sep 29 2025 - High pressure at the surface and aloft will keep a dry air mass in place through midweek with no chance for rain, very warm days, and mild nights.
-Additional opportunities for scattered precipitation exist through the remainder of the week /Issued 200 PM MDT Mon Sep 29 2025/ - Meteorological Overview: An upper-level trough, extending south from a Gulf of Alaska low, will gradually move inland this week. By late week, the upper low center will reorganize offshore of the Pacific Northwest. Southerly flow aloft, preceding the trough, will drive afternoon temperatures significantly above seasonal averages today.
A cooler and wetter pattern persists through the week with temperatures near to below seasonal normals and multiple chances for showers.
As the combination of available moisture and weak ascent may be enough to trigger a few isolated light rain showers across the highest elevations of the mountains today, but little, if any accumulation is expected.
An upper level ridge will slowly translate eastward over the Midwest and western Great Lakes through tonight. At the surface, strong high pressure will continue to slide east over Ontario. Temperatures should max out just a degree or two cooler than yesterday: a lot of mid 80s with the warmest spots in the upper 80s. In general, upper level ridging lingers over the region during this time frame.
Temperatures will be 3 or 4 degrees warmer,, with in the upper 80s due to increased sunshine.
A building high pressure starts moving into the area from the north, bringing drier air into the area this afternoon and tonight allowing cloud cover to start clearing out some late today. As the high strengthens, the pressure gradient is expected to tighten. With the drier air and diminishing cloud cover, overnight lows are forecast to be cooler than they have been in recent nights.
1231 AM CDT Tue Sep 30 2025 - Some increase in cloud cover today shouldn't keep temperatures from climbing well into the 80s and perhaps even the lower 90s today.
106 AM EDT Tue Sep 30 2025 - Much above normal temperatures to continue on Tuesday with highs in the low to mid 80s.
459 AM EDT Tue Sep 30 2025 Dry weather and above normal temperatures are expected through the week with high pressure in control. Eastern CONUS ridging will remain dominant today. Current observed values are running near 5 degrees warmer than the same time early yesterday morning. KEY MESSAGES: - Gradual clearing this evening - Dry conditions continue - Slightly cooler Wed/Thur ---------------------------------------------------------------- Ensembles remain consistent and show good agreement with ridging remaining in place over the eastern CONUS. ------------------------------------------------------------------- The ensembles remain consistent in showing the broad eastern CONUS ridge remaining through the weekend, maintaining dry conditions and above normal temperatures.
-Additional opportunities for scattered precipitation exist through the remainder of the week /Issued 545 PM MDT Mon Sep 29 2025/ - Meteorological Overview: An upper-level trough, extending south from a Gulf of Alaska low, will gradually move inland this week. By late week, the upper low center will reorganize offshore of the Pacific Northwest. Southerly flow aloft, preceding the trough, will drive afternoon temperatures significantly above seasonal averages today.
204 AM EDT Tue Sep 30 2025 High pressure will result in a prolonged period of dry weather across the area through the entire week.
- Some increase in cloud cover today shouldn't keep temperatures from climbing well into the 80s and perhaps even the lower 90s today.
Early this morning an upper level ridge of high pressure extended from the lower Mississippi Valley north into the Upper Great Lakes and then northwestwards into northern Manitoba and Saskatchewan. With ample dry air in the low to mid levels the main effect of the moisture was high level bands of clouds traversing the area. Temperatures had stayed warmer overnight compared to the last few nights, with mainly 50s and 40s in the usual cold spots. High pressure building into Ontario and Quebec will continue to bring easterly flow into the U.
(Today and tonight) Hopefully y'all enjoyed the cloudy skies and cooler conditions from yesterday because it will the last for this week at least. The upper troughing over the High Plains will move away from the region by this afternoon as ridging begins to build over Mexico and a secondary trough treks towards CONUS just off the coast of the Pacific Northwest. Northwesterly flow aloft will prevail through much of the day, however will shift to zonal flow as the trough leaves the region. Highs will be in the lower 80s over northwestern zones and lower 90s across southeastern zones. Tonight will be quiet and cool with lows in the lower 50s to lower 60s.
- As the ridge breaks down, chances for precipitation begin tonight. WEATHER PATTERN OVERVIEW: The upper ridge will remain over the northern plains through today. Temperatures will slowly trend downward this week as a trough from the southwest moves in followed by a trough coming in from the northwest this weekend.
- Much cooler temperatures for the rest of the week. A cold front slipped through the region early this morning. Temps today will be noticeably cooler with most communities seeing highs in the 60s today.
* Much cooler morning low temperatures possible during the weekend with readings in the 20s and 30s.
120 AM EDT Tue Sep 30 2025 High pressure to the north will combine with the circulation around Tropical Storm Imelda to bring a cool and moist northeast flow to the region into Tuesday.