Aikyam-Lab/Synoptic-Bench huggingface dataset:
322 PM EDT Sun Sep 7 2025 * A large area of high pressure builds into the state today and brings generally dry conditions with partly to mostly sunny and low daytime humidity for at least the next 5 days after any early morning valley fog dissipates by 10 AM. A much drier air mass characterized by PWATs below the 10th percentile for this time of year will move in overnight as high pressure builds in from the west. There appears to be at least some potential for portions of McKean County to see temperatures dip below freezing, but with some lingering uncertainty regarding how quickly cloud cover decreases, we have opted against going with a Freeze Warning.
A large area of high pressure over the Midwest sits beneath a deep upper-level trough per recent observations. Between this high and northwesterly flow on the backside of the trough over the Middle Mississippi Valley, our weather remains dry and clear. Tomorrow, the upper-level trough deamplifies with northwesterly flow weakening over the Middle Mississippi Valley.
228 PM EDT Sun Sep 7 2025 - Frost possible tonight across the interior north - Dry and warmer this week - Frost possible tonight across the interior north The center of high pressure is over Michigan today and we'll see the diurnal cu dissipate with sunset. - Dry and warmer this week The high will drift east early this week and south winds will develop. That'll push warmer air northward into the Great Lakes.
Cooler air retreats east today with a ridge building to the west. Heading into Monday, moisture and warmer temperatures return to the area, with afternoon highs in the 70s to near 80 degrees.
843 PM EDT Sun Sep 7 2025 * A large area of high pressure builds into the state today and brings generally dry conditions with partly to mostly sunny and low daytime humidity for at least the next 5 days after any early morning valley fog dissipates by 10 AM. A much drier air mass characterized by PWATs below the 10th percentile for this time of year will move in overnight as high pressure builds in from the west. There appears to be at least some potential for portions of McKean County to see temperatures dip below freezing, but with some lingering uncertainty regarding how quickly cloud cover decreases, we have opted against going with a Freeze Warning.
Afternoon considerations include RH drops to minimums around 30 or into the 20s percentile, but winds are kept at bay by the predominance of high pressure. The boundary layer will quickly decouple tonight with high pressure in control over the region.
839 PM EDT Sun Sep 7 2025 A chilly high pressure system will remain over our region through mid week and then temperatures will moderate. We are looking at minimums in most areas outside the Finger Lakes in the low to mid 40s with normally colder air areas in the mid to upper 30s with some patchy frost. Skies should clear out tonight for most of the area as high pressure builds into the region. High pressure slides over us tomorrow night. Did leave in a patchy mention where the lows fall into the mid 30's.
Conditions don't change appreciably for the start of the workweek as the local area remains at the base of a mid and upper level trough over the eastern US coast.
636 PM CDT Sun Sep 7 2025 - High pressure will facilitate relatively mild and dry weather across the area through the midweek ahead while evening lows are projected to be noticeably cool tonight and Monday night.
707 PM EDT Sun Sep 7 2025 High pressure will provide dry conditions through much of the week. An upper level trough continues to pivot through the area, but is only amounting to high based clouds with shallow moisture at about the 700mb level with very dry conditions above and below. Below normal temperatures persist, however, with highs in the lower to mid 70s.
737 PM EDT Sun Sep 7 2025 Drier and cooler weather will prevail for much of the week as high pressure becomes well established across the region.
730 PM EDT Sun Sep 7 2025 High pressure builds in tonight.
956 PM EDT Sun Sep 7 2025 * A large area of high pressure will bring generally dry conditions with partly to mostly sunny and low daytime humidity for at least the next 5 days after any early morning valley fog dissipates by 10 AM. Upper trough axis should be overhead in a few hours. A much drier air mass characterized by PWATs below the 10th percentile for this time of year will move in overnight as high pressure builds in from the west. There appears to be at least some potential for portions of McKean County to see temperatures dip below freezing, but with some lingering uncertainty regarding how quickly cloud cover decreases, we have opted against going with a Freeze Warning.
623 PM CDT Sun Sep 7 2025 (This evening through Monday night) High pressure with slightly cooler temperatures and a much drier air mass has pushed through the area with the associated front lying just offshore across Gulf waters. The low temps tonight will be in the low 60s along and north of the I-10/12 corridor and in the low 70 south; and for tomorrow night in the upper 60s and mid 70s.
631 PM CDT Sun Sep 7 2025 - Warmer week ahead! Highs return to the 70s for most, pushing to around 80 for the end of the week.
1051 PM EDT Sun Sep 7 2025 High pressure builds in tonight.
642 PM EDT Sun Sep 7 2025 South FL will see more convective activity today as less cloud cover this morning allowed for temps to reach the lower 90s early this afternoon. Meanwhile, a short wave over the E Gulf may contribute additional instability across the area today, which combined with the relatively weak S/SW flow at the sfc, should bring the highest chances of showers and thunderstorms over the eastern half of SoFlo this afternoon. Very similar weather pattern continues on Monday, as the remnant boundary over C FL dissipates and, and high pressure establishing over the E CONUS pushes the second front pushes further south and into C FL.
633 PM EDT Sun Sep 7 2025 A prolonged period of mostly dry weather is expected as high pressure dominates. KEY MESSAGES: - Below-normal temperatures expected tonight and Monday --------------------------------------------------------------- Tonight starts another extended run of dry weather for the region under high pressure. Some steam fog will be possible over the warmer rivers. With warming 850mb temperatures as the high pressure center edges eastward and as heights aloft start to rise, afternoon highs will be a couple degrees warmer than today.
637 PM EDT Sun Sep 7 2025 - Frost possible tonight across the interior north - Dry and warmer this week - Frost possible tonight across the interior north The center of high pressure is over Michigan today and we'll see the diurnal cu dissipate with sunset. - Dry and warmer this week The high will drift east early this week and south winds will develop. That'll push warmer air northward into the Great Lakes.
806 PM EDT Sun Sep 7 2025 High pressure builds in tonight.
High pressure centered over the region maintains generally dry and stable conditions this period. * None Upper trough axis passes overhead this afternoon with subsidence beginning to further dry and warm the mid-levels. Loss of daytime heating will cause skies to clear and a cold night is in store as a 850mb thermal trough sits overhead at around 4C, or below the 10th percentile for the date. Based on dew points, temps should have no problem falling to the lower 40s by Monday morning.
821 PM EDT Sun Sep 7 2025 A cold front moves south of the forecast area tonight, bringing cooler and drier air by Monday. Key Message(s): - Cold front is moving through the southern Midlands. Cold front has pushed through the central Midlands of SC, and is moving through the southern Midlands and into the CSRA this evening. Dewpoints in the lower 60s and upper 50s along the SC/NC border will continue moving southward overnight and should setting into the central Midlands by morning. Low temperatures drop into the low to mid 60s by morning. Key message(s): - Cooler and dry conditions expected early this week with high pressure building into the region. This will continue to filter drier and cooler air into the forecast area on Monday.
During the late afternoon to early evening hours, a couple showers and thunderstorms developed along a cloud line that was bubbling over the Lower Keys. Temperatures along the Island Chain are in the lower to mid 80s with dew points in the mid to upper 70s. Similar theme to previous evenings, a weak low pressure remains across the east-central Gulf with weak high pressure over the Bahamas. This trough will finally wash out heading into mid week.
734 PM EDT Sun Sep 7 2025 High pressure rules the roost today into much of the new week, yielding a stretch of dry weather, and gradually warming temperatures.
High pressure is set up to our north and that has brought great weather today. Cold air advection continues today over Middle TN though the trough that has been over us for several days now is becoming less amplified as it shifts east. Have brought afternoon temperatures below NBM guidance again today to account for continued CAA, though today will be warmer than yesterday with much more sunlight present. Monday looks great with temperatures warming into the low 80s and passing high clouds during the afternoon.
High pressure and dry northerly flow will continue tonight. With skies remaining clear, most areas will see overnight lows into the mid/upper 50s F with lows around 60 F for the highway 84 corridor.
801 PM EDT Sun Sep 7 2025 A prolonged period of mostly dry weather is expected as high pressure dominates. KEY MESSAGES: - Below-normal temperatures expected tonight and Monday --------------------------------------------------------------- Tonight starts another extended run of dry weather for the region under high pressure. Some steam fog will be possible over the warmer rivers. With warming 850mb temperatures as the high pressure center edges eastward and as heights aloft start to rise, afternoon highs will be a couple degrees warmer than today.
Monday looks breezy, warm, and dry in our CWA as a Pacific upper low nears the coast.
An area of low pressure continues to spin over the eastern gulf waters and a stationary frontal boundary remains over northern Florida. An area of low pressure in the eastern gulf continues to push showers and a stray storm over the eastern gulf waters and west coast of Florida. A stationary frontal boundary remains stretched across northern Florida and an area of low pressure remains over the eastern gulf waters.
Monday will feature the start of warmer temperatures that will then settle in through the remainder of the period. Highs will still be below normal (around 70) Monday, but rapidly trend above normal in the low to mid 80s by mid week and linger in that range through the upcoming weekend. A series of troughs will help keep the much warmer temperatures confined west of the region, but the chances for precip that would normally accompany them are unlikely to occur as deeper moisture remains cutoff to the west or down along the Gulf states. Strong ridge of high pressure anchored over the lower Great Lakes will ensure light winds and mostly clear skies.
638 PM CDT Sun Sep 7 2025 An upper trof over the eastern CONUS weakens through Monday then is rejuvenated through midweek by a system which advances from the Plains.
South of this boundary dew pts forecast by all CAMs and global models to reach the low-mid 60s mid to late this afternoon and with high temps arounnd sfc CAPE values over 2000 j/kg are forecast near the MN/SD/ND border region. But otherwise warming temps aloft with 500 mb ridge developing north into central Canada while 500 mb trough moves into the western US.
Upper-level ridging is progged to develop across the central CONUS during the middle to end of the week which will largely keep the Missouri Ozarks in a dry and warm pattern.
104 AM EDT Mon Sep 8 2025 High pressure building in from the north will bring cooler and drier weather to the area for the first half of the week. Key Message(s): - Cooler and drier air slowly moving into the area. It is moving only very slowly southeastward with time, Therefore, while dewpoints will be dropping indicating near surface drying as sprawling high pressure builds over the northeastern U. Another impact from the high will be a tightening surface pressure gradient, allowing the winds to freshen up during the day.
Fall-like weather is expected to set in midweek with breezy and cooler weather and a slight chance for showers and thunderstorms. High pressure remains in place over Arizona today, keeping temperatures fairly typical for this time of year. Nevertheless, some linger moisture in the low-levels may be just enough for a couple isolated showers and thunderstorms to develop this afternoon. Heights begin to fall through the upcoming week as a trough begins to eject off the Pacific and move into the Great Basin.
pdf A frontal boundary will move just to the south this morning, and become located in a southwest to northeast oriented inverted trough this afternoon. This boundary will sink a little further south Tonight, as high pressure builds to the north. The gradient between the high and trough will be elevated Today, resulting in a surge of winds down the coast Today and Tonight.
This setup will continue into tomorrow morning until the warm front lifts through the region or the LLJ dissipates. Along this weaker, more cold frontal boundary another round of storms are possible.
* A Pacific trough brings cooler, drier, and windier conditions this week.
(Rest of tonight and Monday) High pressure will remain dominant tonight as winds have subsided and mostly clear skies are persisting. Dry weather will persist to begin the work week as an upper trough axis shifts off the northeast coast and high pressure slowly meanders northeast.
- Still some uncertainty on how the late week and weekend will play out, though there does look to be a period of rain at some point with cooler temperatures. /Issued Issued by National Weather Service Missoula MT/ - Meteorological Overview: Southwesterly flow aloft ahead of an approaching trough off the Pacific Northwest coast is winning out against the weakening ridge that has been in place across the west.
123 AM EDT Mon Sep 8 2025 High pressure maintains control through much of the week, yielding a stretch of dry weather amid gradually warming temperatures.
High pressure will continue to move further east of the region today into Tuesday. Warm air advection developing should help highs rise to around 70 or in the lower 70s this afternoon. Warm air advection continuing into Tuesday should bring lows into the lower 50s tonight, with highs into the middle 70s Tuesday.
Discussion: Currently, broad troughing is in place across the eastern U. with high pressure centered near the Great Lakes region. By late in the week, broad ridging will expand from the west with troughing to our east gradually lifting away from the area. Chattanooga Airport, TN 81 58 83 58 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 79 55 81 56 / 0 0 0 0 Oak Ridge, TN 78 54 81 55 / 0 0 0 0 Tri Cities Airport, TN 76 48 77 49 / 0 0 0 0.
1220 AM CDT Mon Sep 8 2025 High pressure and dry northerly flow will continue tonight. With skies remaining clear, most areas will see overnight lows into the mid/upper 50s F with lows around 60 F for the highway 84 corridor.
By Monday evening, this ridge will shift to become more NE to SW elongated with NE-ENE low level flow into C AL. In the upper levels, broad troughing across ERN Conus will become flattened as the main low over ERN Canada pushes EWD. Look for some minor variations with the high temperatures for Monday.
210 AM EDT Mon Sep 8 2025 High pressure maintains control through much of the week, yielding a stretch of dry weather amid gradually warming temperatures. High pressure in control at the surface will sustain quiet weather across the forecast area both today and tonight. Temperatures should remain a few degrees shy of normal with highs in the 60s for the higher elevations of the northeast mountains and 70s for the rest of the forecast area. During this time, temperatures gradually moderate towards normal with highs likely returning to mid 60s to 70s for the higher terrain and upper 70s to mid 80s within the lowlands.
Early afternoon satellite imagery and surface obs showed shallow cumulus and high pressure across the region. Winds were light, and temperatures were in the low 60s. This should keep temperatures a bit warmer, reducing the risk of patchy frost. On Tuesday the upper level wave continues toward the Great Lakes, and any surface feature that could be a focus for storms gets washed out as upper level ridge builds across the central CONUS.
MONDAY/TUESDAY: A prominent upper lvl trof is situated over the Eastern region of the CONUS. At the sfc, a center of high pressure will meander across the region and assist in keeping temperatures 5 to 10 degrees below average compared to normals for this time of the year.
This area generally represent the dividing line between broad cyclonic flow across the eastern half of the country, and a ridge axis that is nearly oriented along the Continental Divide. It appears the effective shear should be stronger to our north and west, but may be sufficient for a strong storm or two if the higher values of instability materialize. The precipitation should gradually decrease through the morning/early afternoon as the precipitation encounters drier air to the east and the low-level jet weakens. Showers and storms may linger through the morning Tuesday, but the mid-level ridge axis is expected to shift closer to the southern Plains during the day.
1204 AM CDT Mon Sep 8 2025 (Rest of tonight and Monday) High pressure will remain dominant tonight as winds have subsided and mostly clear skies are persisting. Dry weather will persist to begin the work week as an upper trough axis shifts off the northeast coast and high pressure slowly meanders northeast.
(Today through Tuesday) Model and synoptic analyses depict a deep mid/upper lvl trough descending upon the US east coast, while a sfc stationary boundary remains stretched across the central Gulf and central Fl. Meanwhile, the northern half of the peninsula remains at the base of the trough, which may contribute a little better dynamic support for stronger thunderstorms this afternoon.
106 AM EDT Mon Sep 8 2025 High pressure building in from the north will bring cooler and drier weather to the area for the first half of the week. Key Message(s): - Cooler and drier air slowly moving into the area. It is moving only very slowly southeastward with time, Therefore, while dewpoints will be dropping indicating near surface drying as sprawling high pressure builds over the northeastern U. Another impact from the high will be a tightening surface pressure gradient, allowing the winds to freshen up during the day.
257 AM EDT Mon Sep 8 2025 Drier and cooler weather will prevail for much of the week as high pressure becomes well established across the region. While most areas should see them bottom out in the forties and upper thirties, parts of the Adirondacks and Northeast Kingdom will see them fall into the low to mid thirties.
158 AM PDT Mon Sep 8 2025 Updated at 156 AM PDT Mon Sep 8 2025 * Dry conditions Monday through Tuesday afternoon as upper ridge builds over the four corners, keeping drier SW flow aloft over Nevada.
118 AM EDT Mon Sep 8 2025 - Frost possible tonight across the interior north - Dry and warmer this week - Frost possible tonight across the interior north The center of high pressure is over Michigan today and we'll see the diurnal cu dissipate with sunset. - Dry and warmer this week The high will drift east early this week and south winds will develop. That'll push warmer air northward into the Great Lakes.
151 AM EDT Mon Sep 8 2025 Outside of some spotty lake effect showers early this morning, expansive high pressure will guarantee fair weather prevails through the work week. Temperatures will trend warmer day by day through midweek, then remain seasonable through the weekend. Broad upper level troughing and cool air aloft will linger overhead through the day today while progressive sfc-850mb ridging builds squarely over the eastern Great Lakes. Despite the colder start (and even potentially some patchy frost across the interior) high temperatures will be a few degrees warmer overall compared to yesterday.
This is developing in an area of strong isentropic ascent, evident at the 305 K and 310 K levels, in conjunction with modest moisture transport associated with the low- level jet. Given this, and the diurnal weakening of the low-level jet, it seems unlikely our northwestern zones will see any precipitation this morning. This evening and tonight, as the low-level jet begins to strengthen again, increasing moisture transport into NE KS and NW MO, and as isentropic ascent increases, showers and a few storms will increase in coverage.
This will lead to a comfortable early morning with lows in the low 60s to low 70s.
242 AM EDT Mon Sep 8 2025 High pressure builds in today and stays in control through at least Tuesday.
Afternoon considerations include RH drops to minimums around 30 or into the 20s percentile, but winds are kept at bay by the predominance of high pressure.
More of the same for Monday in terms of temperatures, although slightly warmer across easter Wyoming and the Nebraska Panhandle where temperatures may soar to near 90 in a few spots. Mid-level water vapor shows the next low pressure system of the coast of California/Oregon now. Cluster analysis show majority of the ensembles stalling the system as it collides with the ridging pattern to give us a wet work week.
- Dry conditions have taken hold of the region and this trend will continue into the foreseeable future - Temperatures will gradually warm back into the lower to mid 90s by the middle of the week - Despite returning to the lower to mid 90s, dewpoints will remain low enough that it shouldn't feel miserable No major changes to the forecast over the next 7 days. Current upper-air analysis shows a trough over the eastern CONUS and a ridge building in the southwest CONUS. As we move through the week, this ridge will only gradually push eastward and take hold of our region.
Troughing aloft, with its axis east of the Lower Mississippi River Valley, encompasses nearly the entire eastern half of the United States. Dew points this afternoon will mix into the upper 40s to upper 50s across the area, as highs top out in the low to middle 80s under mostly sunny skies.
High pressure holds over the region today and tonight, promoting very light winds and clear-mostly clear skies. Center of midlevel high pressure will push across portions of northern Lower Michigan today resulting in strongly anticyclonic and isentropic downglide trajectories today.
- High pressure will facilitate relatively mild and dry weather across the area through the midweek ahead while evening lows are projected to be noticeably cool tonight and Tuesday night.
(Tonight through Tuesday night) Deep troughing across the eastern CONUS will keep the local area under generally northwest flow aloft. Dry high pressure will continue to build into the area tonight. The drier air will allow more efficient radiational cooling, and we should wake up to temperatures in the low to mid 60s across northern areas and lower 70s across southern areas. Moisture will increase a bit across coastal areas in response to a weak inverted trough in the northern Gulf.
(Tonight through Tuesday Night) A strong area of high pressure is set up to our north and will bring quiet weather for the start of the week.
- Cooler weather continues today with highs mostly in the 70s before temperatures warm into the 80s for the rest of the week. Upper level ridging will then build in through the day and start our return to warmer weather.
1228 AM CDT Mon Sep 8 2025 A weak cold front across the northern ranchlands this evening will continue to drift slowly southward and linger across the CWA Monday into Tuesday. A low to medium (20 to 60 percent) chance of rain will continue along the Lower Texas Coast and over the Gulf waters through the period.