Aikyam-Lab/Synoptic-Bench huggingface dataset:
Thunderstorms continue ahead of a cold front. The cold front has moved through Burns and Baker City and will race across the rest of the forecast area later tonight reaching Boise around midnight and continue moving east reaching the Magic Valley by 3 am. A cold front will move from east to west tonight reaching the Idaho border by 04Z, KBOI by 06Z, and KTWF by 09Z. Prevailing winds will shift to NW at 10 to 15 kts behind the cold front. Cold frontal passage around 06Z.
209 AM EDT Tue Sep 30 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.
A large ridge of high pressure remains in place from the Great Lakes down into the MS Valley as Tropical Storm Imelda remains off the Southeast's Atlantic Coast. Daytime highs will be warm, reaching the lower 80s across NE AL and southern middle TN where there will be more cloud cover, to the mid and upper 80s elsewhere.
312 AM EDT Tue Sep 30 2025 A cold front moves through dry today into tonight. A large area of high pressure builds in from the north thereafter and remains over the northeast and mid Atlantic through this week, with the center pushing south of the area by the first half of the weekend. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area today into tonight with a cooler airmass to follow. This will allow the high clouds to push south of the area, so expecting this morning to be mostly cloudy with dense high clouds, but more clouds than sun by this afternoon into this evening.
119 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 confident in the current ridge development. Currently, there is a strong upper-level ridge extending from the Carolinas northwestward to North Dakota/eastern Montana. With this strong ridge in place, cloud coverage from Humberto or Imelda is expected to be kept east by the cool north-northeasterly wind.
- High pressure aloft will keep a dry air mass in place through midweek with no chance for rain, very warm days, and mild nights.
242 AM EDT Tue Sep 30 2025 High pressure will result in a prolonged period of dry weather through the week and into the weekend.
No real changes to the pattern going forward, ridging still dominates at the sfc and aloft through the week and weekend.
322 AM EDT Tue Sep 30 2025 A dry cold front will drop out of Canada will move through early this morning bringing northerly breezes and temperatures ten to as much as 20 degrees cooler than yesterday.
There's nothing new under the sun today with mid/upper level ridging aloft and surface riding extending from the eastern Canadian Provinces, through the Great Lakes and into the mid-Mississippi Valley. Factoring in micro-climate behavior may produced a brief, localized fog potential in the notably cooler, outlying valleys with limited impact.
The main impact from the disturbance is expected to be increasing cloud cover Monday night through the day Tuesday, which could keep temperatures from reaching their full potential Tuesday afternoon with highs in the low/mid 80s for the CWA.
Temperatures will be 3 or 4 degrees warmer,, with in the upper 80s due to increased sunshine. High pressure over northern Mexico will remain the primary synoptic influence keeping any significant weather systems or fronts from impacting the region. Highs each afternoon will generally be in the lower to mid 90s, with overnight lows in the lower to mid 60s. Over the weekend, an upper level low will deepen across the Rockies with another upper low over the southeastern U. High pressure will remain in place between these two systems resulting in unseasonably warm conditions for the first weekend in October.
Strong upper ridge remains centered just SW of the state near Chicago. This is supporting the low level wind flow from the E/NE.
This mundane weather pattern is still expected to continue through the short term, with a large synoptic ridge along, of which has been reinforced by emergence of warm-core lows over the atlantic and strong AVA over the Eastern Canadian Provinces. This large upper level ridge is the primary culprit for the well above normal temperatures we have been experiencing.
1253 AM EDT Tue Sep 30 2025 High pressure will lead to continued dry and warm conditions through the week. A large high pressure persists across the Great Lakes and Ohio Valley region, continuing to provide dry conditions. A deep ridge also remains in place, supplying above normal temperatures once again this afternoon. With the high pressure to the north and low pressure to the southeast, northeasterly winds are noticeable this afternoon.
High pressure continues to hold a firm grasp across much of the mid south early this morning. Latest deterministic guidance shows ridging will stay in place through Tuesday.
237 AM MDT Tue Sep 30 2025 KEY MESSAGES: - Wet and cool today, with cooler and unsettled weather continuing through the work week - Further cooling expected this weekend, with increasing chances for mountain snow, especially near the Continental Divide A low-pressure system off the Pacific Northwest coast will maintain southwest flow aloft over western Montana and north-central Idaho. 25 inches or more across the higher terrain of north-central Idaho and western Montana. This active and cool pattern continues through the work week as the low slowly shifts inland.
Updated at 219 AM CDT Tue Sep 30 2025 - Warmer temperatures with dry weather conditions can be expected today through the upcoming weekend.
236 AM EDT Tue Sep 30 2025 - Much above normal temperatures to continue today with highs in the low to mid 80s.
- Northeast winds near Lake Superior will lead to cooler by the lake conditions today and rip currents with waves building to 4 to 6 feet.
Upper ridging centered over the Midwest remains the key feature this morning, keeping warm and dry conditions in place across the region. We are seeing a few more clouds this morning though, associated with mid-level lift ahead of an old upper low that is now a decaying trough axis over the Souther Plains. Otherwise, the only impact will be for afternoon temperatures just a degree or two cooler than yesterday wherever thicker cloud cover persists.
240 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.
Farther east, temperatures are in the low to mid 80s. Another change from the past few days is that Tds have climbed into the low 60s thanks to the return of southerly flow. This increase in moisture coupled with a weak wave embedded in the ridge could lead to a few sprinkles early tomorrow morning. Forecast soundings are still fairly dry in the low levels, so anything that does fall will be very light.
417 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 confident in the current ridge development. Currently, there is a strong upper-level ridge extending from the Carolinas northwestward to North Dakota/eastern Montana. With this strong ridge in place, cloud coverage from Humberto or Imelda is expected to be kept east by the cool north-northeasterly wind.
1125 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.
High pressure continues to hold a firm grasp across much of the mid south early this morning.
/NEW/ /Overnight through Tuesday Night/ Water vapor imagery shows a trough axis spreading through West Texas at this hour with a tap into Pacific moisture resulting in thick high cloud cover across the region. Clearing skies will allow temps to drop a few degrees lower Tuesday night with readings in the low to mid 60s.
1230 AM CDT Tue Sep 30 2025 Updated at 1228 AM CDT Tue Sep 30 2025 - Warmer temperatures and dry weather conditions return Tuesday through the upcoming weekend. (This afternoon through Tuesday night) Upper level trough continues to swing through the area through tonight and ejects to the east over the course of Tuesday. Upper level ridge strengthens and moves in from northern Mexico. The low desert along the Rio Grande sees temperatures jump into the low to mid 90s. Rain chances fall towards zero as the aforementioned ridge moves overhead.
631 AM EDT Tue Sep 30 2025 High pressure will lead to continued dry and warm conditions through the week. A large high pressure persists across the Great Lakes and Ohio Valley region, continuing to provide dry conditions. A deep ridge also remains in place, supplying above normal temperatures once again this afternoon. With the high pressure to the north and low pressure to the southeast, northeasterly winds are noticeable this afternoon. These winds will increase once again Wednesday afternoon as the strong high pressure descends into southeast Canada. The winds are bringing in air originating from a cooler air mass, allowing for high temperatures to be slightly cooler than previous days.
High pressure has become established across northern Ontario resulting in a northeasterly wind field across the region today. A longwave mid-upper ridge continues to translate over Great Lakes today bringing stable conditions and no precipitation to speak of through the remainder of the work week. Surface to 850 mb flow becomes more north to northeast oriented on the south end of a strong high pressure emerging out of central Canada. This draws a backdoor cold front through southeast Michigan early today bringing daytime highs down a notch to the upper 70s to 80 degrees for most of southeast Michigan. The exception will be on the shoreline areas of the Thumb and Bay County that will be in the low-mid 70s.
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 breaking up 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. The dry air mass will prevent rainfall but the driest air won't reach the forecast area until overnight with dewpoints dropping in to the low to mid 50s.
615 AM CDT Tue Sep 30 2025 - High pressure aloft will keep a dry air mass in place through midweek with no chance for rain, very warm days, and mild nights.
527 AM EDT Tue Sep 30 2025 A cold front moves through dry today into tonight. A large area of high pressure builds in from the north thereafter and remains over the northeast and mid Atlantic through this week, with the center pushing south of the area by the first half of the weekend. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area today into tonight with a cooler airmass to follow. This will allow the high clouds to push south of the area, so expecting this morning to be mostly cloudy with dense high clouds, but more clouds than sun by this afternoon into this evening. It will feel like Autumn on Wednesday with the cooler air mass settled in.
306 AM PDT Tue Sep 30 2025 A low pressure system moving inland along the West Coast will bring cooling today with coastal low clouds extending well inland and onto the lower coastal mountain slopes this morning as the marine layer deepens.
/Issued 1126 PM CDT Mon Sep 29 2025/ /Overnight through Tuesday Night/ Water vapor imagery shows a trough axis spreading through West Texas at this hour with a tap into Pacific moisture resulting in thick high cloud cover across the region. Clearing skies will allow temps to drop a few degrees lower Tuesday night with readings in the low to mid 60s.
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. A large area of high pressure will settle over the region for the middle of the week, leading to dry conditions and mostly clear skies.
641 AM CDT Tue Sep 30 2025 Updated at 639 AM CDT Tue Sep 30 2025 - Warmer temperatures with dry weather conditions can be expected today through the upcoming weekend. (Today through Wednesday afternoon) An upper-level trough will move eastward across Oklahoma and into eastern portions of Texas today while upper-level ridging builds across southeast New Mexico and west Texas behind this departing feature. The upper-level ridge will continue to strengthen over our forecast area through Wednesday afternoon. Surface lee troughing will also take shape from eastern New Mexico into far west Texas through Wednesday. Temperatures will continue to trend warmer in the mid 80s to lower 90s over most of our region by Wednesday afternoon, with a few readings topping out in the mid 90s to near 100 degrees along the Rio Grande.
1034 AM EDT Tue Sep 30 2025 A cold front moves through dry today. A large area of high pressure builds in from the north thereafter and remains over the northeast and mid Atlantic through this week, with the center pushing south of the area by the first half of the weekend. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area today with a cooler airmass to follow. This will allow the high clouds to push south of the area, so expecting this morning to be mostly cloudy with dense high clouds, but more clouds than sun by this afternoon into this evening. It will feel like Autumn on Wednesday with the cooler air mass settled in.
535 AM EDT Tue Sep 30 2025 - Much above normal temperatures to continue today with highs in the low to mid 80s.
- 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. This means as each storm moves inland, we will the pattern splitting with one or more closed lows developing somewhere over the West. While this type of pattern has a bit more difficulty with predicting where these closed lows end up, it will remain showery at this point. A cold front moved through the region this morning. Cooler temps and higher humidities accompanied the front. Peak wind gusts this afternoon and Wednesday afternoon will be 15 to 25 mph with the stronger gusts most likely near ridges.
740 AM EDT Tue Sep 30 2025 A cold front moves through dry today. A large area of high pressure builds in from the north thereafter and remains over the northeast and mid Atlantic through this week, with the center pushing south of the area by the first half of the weekend. Upper ridging east of the Mississippi River Valley and troughing across eastern Canada will allow a cold front to drop down across the area today with a cooler airmass to follow. This will allow the high clouds to push south of the area, so expecting this morning to be mostly cloudy with dense high clouds, but more clouds than sun by this afternoon into this evening. It will feel like Autumn on Wednesday with the cooler air mass settled in.
(Tonight through Wednesday Night) There's not much to talk about with the weather as the overall pattern continues to be dominated by upper-level high pressure. There does remain the low chance that some moisture off the coast seeps into the far eastern Plateau Tuesday, helping to develop very isolated showers.
A tightening pressure gradient should result in some gusty winds by afternoon with gusts around 20 to 25 mph as high pressure builds southward. With the drier air and diminishing cloud cover, overnight lows are forecast to be cooler than they have been in recent nights. The dry air mass will prevent rainfall but the driest air won't reach the forecast area until overnight with dewpoints dropping in to the low to mid 50s.
(Rest of Today and Tonight) With now Hurricane Imelda just off the coast of Florida, Georgia, and the Carolinas, the upper level trough will continue to be ingested by this system through midweek. The western portion of the trough will continue to influence the eastern portion of our area through this evening before shifting east on Wednesday. Additionally, a surface inverted trough looks to form over the Tennessee Valley today. As for temperatures, we'll see areas along and west of I-65 reach the mid to upper 80s this afternoon, with areas east of I-65 topping out in the lower to mid 80s. Lastly, expect low temperatures later tonight to dip into the lower to mid 60s.
Mid-upper trof axis situated across West Texas should continue making its way eastward today, and eventually to our east tonight. Once we get on the backside of the trof and into a drier nwly flow aloft, we'll see decreased/thinning cloudiness. One other thing of note in the short-term time period is the low RH's and fire weather awareness.
- Cooler, more seasonable conditions, and 20 to 40 percent rain chances return at the end of the week. Ridge off upper level high pressure over the Great Lakes Region will keep amplifying through Wednesday night.
- Temperatures will gradually warm from near normal to slightly above normal by the end of this week as a ridge of high pressure builds over the Desert Southwest. - A dry weather system passing north of the region will bring breezy conditions and slightly cooler temperatures to the area this weekend. This dry pattern will foster mostly sunny skies over the forecast area today with highs warming back to right around normal into the low to mid 90s across the lower deserts and mid 80s for much of the higher terrain areas. Very similar conditions are expected on Wednesday with only minor changes in the upper-lvl pattern as ridging aloft begins to build over N MX.
737 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.
A low pressure system looks to slide across the West Coast later in the week, resulting in gusty winds and maybe a few isolated showers along the AZ/UT border.
315 AM MDT Tue Sep 30 2025 - An approaching trough will result in increased cloud cover, along with some isolated mountain showers this afternoon, and scattered showers over northeast Utah this evening.
628 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.
633 AM EDT Tue Sep 30 2025 High pressure will result in a prolonged period of dry weather through the week and into the weekend.
721 AM EDT Tue Sep 30 2025 A dry cold front will drop out of Canada will move through early this morning bringing northerly breezes and temperatures ten to as much as 20 degrees cooler than yesterday.
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. On Wednesday winds begin to turn southeast with temperatures remaining similar to Tuesday with somewhat cooler air coming in from the east. The amplitude of the ridge will begin to lessen late in the week through the weekend with a strengthening upper level jet from the southwestern U.
(Today through Wednesday) Today, the state will be between two systems, the high pressure over the MS River Valley slowly moving eastward, and the lower pressure off the east coast. By Wednesday, the high will begin to influence the area more, with the low moving to the east.
High pressure continues to hold a firm grasp across much of the mid south early this morning. Latest deterministic guidance shows ridging will stay in place through Wednesday.
Tropical Storm Imelda and Hurricane Humberto almost spin in unison within troughing to our east. Persistent cloud cover today will notably keep temperatures cooler across our most eastern locations. After a couple of warmer than normal days, a dry pattern will be underway Wednesday, persisting until around the middle of the weekend. Temperatures will be a couple of degrees cooler. Chattanooga Airport, TN 85 64 85 61 / 20 10 0 0 Knoxville McGhee Tyson Airport, TN 82 61 83 58 / 20 10 0 0 Oak Ridge, TN 82 61 84 57 / 20 0 0 0 Tri Cities Airport, TN 74 56 80 53 / 40 10 0 0.
High pressure will continue to remain solidly in control of our weather and will be pivoting directly overhead today into Wednesday.
600 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.
Latest satellite imagery shows clear skies overhead as high pressure and ridging remain the dominant weather influences today. This mundane weather pattern is still expected to continue through the short term, with a large synoptic ridge along, of which has been reinforced by emergence of warm-core lows over the atlantic and strong AVA over the Eastern Canadian Provinces. This large upper level ridge is the primary culprit for the well above normal temperatures we have been experiencing.
346 AM PDT Tue Sep 30 2025 Weather conditions across the area are much quieter than yesterday in the wake of the recent cold front. Temperatures are running a good 15 degrees cooler than 24 hours ago and are expected to top out in the upper 60s to mid 70s in most areas.
518 AM MDT Tue Sep 30 2025 - An approaching trough will result in increased cloud cover, along with some isolated mountain showers this afternoon, and scattered showers over northeast Utah this evening.
This will continue into at least the mid morning hours before the next front pushes towards the coast, resulting in the lower clouds and fog lifting. Wednesday, upper troughing remains offshore with a southwest flow aloft, with off/on showers expected through the day.
With less cloud cover and shower coverage, high temperatures will be able to each the low 90s for most areas across South Florida today and tomorrow. Overnight lows Tuesday night are expected in the low to mid 70s.
151 PM EDT Tue Sep 30 2025 A dry cold front will drop out of Canada will move through early this morning bringing northerly breezes and temperatures ten to as much as 20 degrees cooler than yesterday.
227 PM EDT Tue Sep 30 2025 - Much above normal temperatures to continue today with highs in the low to mid 80s.