Aikyam-Lab/Synoptic-Bench huggingface dataset:
(Today and tonight) A weak cold front is forecast to push slowly southward into the area throughout the day today with slightly cooler and drier conditions in its wake. Highs today are forecast in the upper 80s to mid 90s with overnight low temperatures forecast in the low/mid 60s across SE AL and SW GA to the low 70s elsewhere. Generally expect the lower temps north of the front and higher temps to the south.
Warmer temperatures in the 70s and 80s will be at or slightly above normal. Roughly areas along Highway 14 and portions of southwestern Minnesota and northwestern Iowa have the highest chance of seeing frost. High pressure continues to move into the region from the north throughout the day, keeping conditions dry. Lows by Monday morning will be much warmer than the previous two days, in the 50s with some 60s possible in south central South Dakota. Showers clear out by mid-Monday morning as the low progresses northeast. Conditions the rest of the day should be dry and significantly warmer thanks to continued WAA on southerly winds.
Issued by National Weather Service Grand Junction CO 124 AM MDT Sun Sep 7 2025 - Showers and thunderstorms are likely early this evening, mainly over and near the higher terrain. Today, mid level heights/temps continue to build/warm as upper ridge amplifies over the srn Rockies, with drier air spreading over the higher terrain through the day. Upward forcing should be provided by a couple of weak disturbances cresting the upper ridge and diving into the central plains late this afternoon and evening, and many CAMs now develop strong storms over the plains, with activity lingering well into the evening near the KS border. On Mon, ridge continues to build with the return of 90 degf readings on the plains from Pueblo eastward, while interior valleys see a mix of 70s/80s, mostly 70s mountains (60s higher peaks).
126 AM EDT Sun Sep 7 2025 High pressure rules the roost today into much of the new week, yielding a stretch of dry weather. Cool temperatures in the wake of a cold front will gradually moderate through the week. For early this morning, lingering mid to upper level clouds associated with a cold frontal passage that took place yesterday is now venturing east of the mountains. Afternoon temperatures will plateau in the upper 50s across our highest mountain zones and into the low to mid 70s for the lowlands.
Currently at the surface, a weak area of low pressure is lingering over the eastern Gulf, with southwest low level flow continuing to pump deep moisture into the forecast area through at least mid week. By mid week, a mid level trough will slowly swing into the southeastern US then will lose steam during the second half of the week.
1159 PM EDT Sat Sep 6 2025 - Cool this weekend with highs in the 60s and lows in the lower 40s. Occluded low pressure over Hudson Bay will maintain seasonably cool conditions and intervals of clouds across SE Michigan through the weekend. Cloud cover prevents overly favorable radiative cooling conditions from developing to keep overnight lows in the low to mid 40s despite underachieving high temperatures today. The high pressure circulation then drifts overhead Monday morning, flipping surface winds to the southwest and initiating a period of warm advection that persists through mid-week.
Lows tonight will be a little cooler than what is typical with values in the low to mid 50s.
310 AM EDT Sun Sep 7 2025 - Cool again today with highs in the 60s and lows in the lower 40s. Upper level confluence will then drive the weather for the middle of the week as persistent surface ridging holds on over the region.
One final disturbance rotating around the large upper low will move southeast across the western Great Lakes region this afternoon into this evening. High pressure will move across the area Sunday with light winds allowing for a lake breeze to form. Still some uncertainty for how far inland it may move, but with highs generally in the mid/upper 60s inland, slightly cooler temps are possible near Lake Michigan.
Updated at 1235 AM CDT Sun Sep 7 2025 - Cooler weather continues today into early this week, followed by a gradual warmup through the week.
Today kicks off with temperatures in the lower to mid 80s, and while we will gradually warm into the lower to mid 90s by midweek, the air will remain relatively dry, making the heat much more bearable. Aside from the low deck we have some SCT middeck generally W of I-49.
High pressure over the Midwest will bring dry and relatively cool weather through Monday. Temperatures will reach the low 70s today, rising to the mid 70s by Monday as high pressure departs and winds shift southerly.
Current surface analysis places trough to the lee of the Rockies with broad high stretching from Manitoba through the eastern Dakotas/Minnesota southward into the Ozarks. Upper level analysis places ridge stretching from the Great Basin into the Northern Rockies, with trough from James Bay into the central Great Lakes region. Over our area, cold temperatures continue under and just to the back side of the high, with many locations dipping into the lower to mid 30s.
- Below normal temperatures and drier weather return behind a departing cold front. The latest surface analysis shows a strong dome of high pressure centered over the Buffalo Ridge in southwestern Minnesota. The high- pressure domeâs influence can be felt here in eastern Kentucky, as clear skies and dry weather are present. Overnight lows will be cooler, with lows falling into the low to upper 40s.
725 AM EDT Sun Sep 7 2025 High pressure builds in behind a departing cold front today.
639 AM CDT Sun Sep 7 2025 Updated at 622 AM CDT Sun Sep 7 2025 - Cooler weather continues today into early this week, followed by a gradual warmup through the week.
- Expect isolated to scattered afternoon showers and thunderstorms over the higher terrain daily through mid week.
Today kicks off with temperatures in the lower to mid 80s, and while we will gradually warm into the lower to mid 90s by midweek, the air will remain relatively dry, making the heat much more bearable. Aside from the low deck, we have some SCTVBKN middeck generally W of I-49.
Latest guidance still suggests isolated showers, and possibly a thunderstorms, over the Upper Savannah River valley where a weak inverted trough will lead to low level convergence and moisture pooling. Highs in the 70s for all but the Upper Savannah River valley, around 80, and the higher elevations, 60s. As of 145 am EDT Sunday: A broad/baggy trough will gradually return to the Southeast during the extended, as a strong upper low/short wave trough digs into southeast Canada and New England toward the latter part of the week. Prior to this, inverted surface ridging will be gradually weakening and the air mass modifying across our CWA, with temps warming and humidity increasing.
610 AM CDT Sun Sep 7 2025 (Today) The cold front that brought rain to the local forecast area yesterday has pushed east and cooler and drier air is gradually filtering in from the NW.
(Today) The cold front that brought rain to the local forecast area yesterday has pushed east and cooler and drier air is gradually filtering in from the NW.
We are still on track to have a mostly sunny afternoon with cool high temperatures in the lower to middle 70s. The latest surface analysis shows a strong dome of high pressure centered over the Buffalo Ridge in southwestern Minnesota. The high- pressure domeâs influence can be felt here in eastern Kentucky, as clear skies and dry weather are present. Overnight lows will be cooler, with lows falling into the low to upper 40s.
505 AM 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 warming trend develops today with warmer temperatures to continue the remainder of the week.
520 AM EDT Sun Sep 7 2025 High pressure builds in behind a departing cold front today.
Dewpoints continue to fall slowly as dry air filters in behind the cold front. Scattered patchy fog and low stratus have developed across the low terrain, more or less as expected. As of 145 am EDT Sunday: A broad/baggy trough will gradually return to the Southeast during the extended, as a strong upper low/short wave trough digs into southeast Canada and New England toward the latter part of the week. Prior to this, inverted surface ridging will be gradually weakening and the air mass modifying across our CWA, with temps warming and humidity increasing.
641 AM EDT Sun Sep 7 2025 (Today and tonight) A weak cold front is forecast to push slowly southward into the area throughout the day today with slightly cooler and drier conditions in its wake. Highs today are forecast in the upper 80s to mid 90s with overnight low temperatures forecast in the low/mid 60s across SE AL and SW GA to the low 70s elsewhere. Generally expect the lower temps north of the front and higher temps to the south.
613 AM 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.
610 AM CDT Sun Sep 7 2025 - Cooler weather will persist through Monday with highs mostly in the 70s.
621 AM EDT Sun Sep 7 2025 High pressure will provide for dry conditions for the next several days. An upper level trough with an embedded mid level short wave will move east across the region today. Lows tonight will be in the 40s with highs on Monday in the low to mid 70s. A dry forecast is in store for the region as high pressure remains the dominant weather feature. After morning lows on Monday in the mid-upper 40s and daytime highs in the upper 70s, it will warm up with highs in the low-mid 80s and lows in the mid-upper 50s. High pressure and a dry airmass will build into the region through tonight.
205 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.
1238 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.
This feature, along with the larger scale upper trough, will lift further off to the northeast through the short term forecast period. The low-level airmass is notably dry with sfc dewpoints falling into the 40s. As the high passes by just to our north, light winds will veer N/NE overnight.
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. A high pressure dominated forecast presents moclear sky conditions this package.
Upper level ridging slides east over Colorado for Monday. This will bring warmer and slightly drier air with it. Temperatures trend warmer as well with highs in the mid to upper 80s over northeast Colorado.
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.
GOES-19 water vapor imagery shows the long wave trough slowly moving east of northern Illinois this afternoon. Temperatures will drop to the low 40s and potentially upper 30s in isolated areas and upper 40s to around 50 closer to Lake Michigan. Temperatures are expected to increase into the low 70s by Monday afternoon.
Will have to watch for orographic induced storms across the high plains of Colorado this evening.
1240 PM CDT Sun Sep 7 2025 (Rest of Today and Tonight) In the mid/upper-levels, the TN Valley remains embedded within the flow around a longwave trough across eastern North America, and this will provide dry WNW flow aloft of 20-30 knots today before high-level winds weaken and veer to NNW overnight. At the surface, an area of high pressure (initially centered across southern MN/northern IA) will strengthen as it build east- southeastward into northern OH by 12Z Monday. A 2-4 mb pressure gradient along the southern rim of the low-level ridge will maintain light-moderate NNE flow, with weak CAA expected to be offset by strong insolation today, providing highs in the 75-80F range for most valley locations (lower 70s atop the Cumberland Plateau).
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.
High pressure brings dry weather and clear sky conditions. Discussion: The cold front has moved east of the region with drier air and high pressure arriving. A general warming trend is expected through late week as upper level heights begin to increase and high pressure shifts eastward. Chattanooga Airport, TN 58 81 58 84 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 53 79 55 81 / 0 0 0 0 Oak Ridge, TN 53 78 54 81 / 0 0 0 0 Tri Cities Airport, TN 48 76 49 77 / 0 0 0 0.
As of 135 PM EDT Sunday: An isolated shower or storm can't be ruled out over the Upper Savannah River valley this afternoon where a weak inverted trough will lead to low level convergence and moisture pooling.
Previous Discussion: In the mid/upper-levels, the TN Valley remains embedded within the flow around a longwave trough across eastern North America, and this will provide dry WNW flow aloft of 20-30 knots today before high-level winds weaken and veer to NNW overnight. At the surface, an area of high pressure (initially centered across southern MN/northern IA) will strengthen as it build east- southeastward into northern OH by 12Z Monday. A 2-4 mb pressure gradient along the southern rim of the low-level ridge will maintain light-moderate NNE flow, with weak CAA expected to be offset by strong insolation today, providing highs in the 75-80F range for most valley locations (lower 70s atop the Cumberland Plateau).
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.
Winds will pick up a bit through early this afternoon in the wake of the cold front. Temperatures will be rather pleasant over the next couple of days with highs in the low to mid 80s with lows ranging from the mid 50s to the low 60s.
As the low and mid-level winds turn westerly tonight, monsoonal moisture will be pushed out of the region and shower chances will end.
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.
1248 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.
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.
Seasonable and dry weather today transitions to a period of cooler temperatures and more active weather into the week ahead as a slow moving system affects the region.
Surface analysis shows high pressure now to our east, and a surface boundary running from central Montana into Wyoming. Upper ridge broadens over the northern and central plains the rest of today through Monday, as upper low moves over the PAC NW.
257 PM EDT Sun Sep 7 2025 High pressure builds in tonight.
The light at the end of the tunnel is that once this aforementioned low begins to move onshore, the weather will turn cooler, and showers will start to prevail over thunderstorms.
119 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.
* Steady cooling will result in much cooler temperatures throughout the week.
Thermometers are rising into the lower and mid 70s across most of eastern Kentucky at mid-afternoon under some puffy fair-weather cumulus. As the high passes, dry northwesterly flow over eastern Kentucky this afternoon will slowly veer northeasterly to easterly on Monday/Monday night. A few of the coldest hollows could briefly dip into the lower 40s.
Isolated showers and thunderstorms across the higher terrain today with dry conditions for the start of the work week. 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.
258 PM EDT Sun Sep 7 2025 A deep trough will remain across the Great Lakes tonight before high pressure builds in by Monday.
A slight chance of showers and a few storms has been added around the Watertown area (east central SD into west central MN) for 05-15Z Monday as the low level jet sets up and there is weak upper level support.
(Rest of Today and Tonight) In the mid/upper-levels, the TN Valley remains embedded within the flow around a longwave trough across eastern North America, and this will provide dry WNW flow aloft of 20-30 knots today before high-level winds weaken and veer to NNW overnight. At the surface, an area of high pressure (initially centered across southern MN/northern IA) will strengthen as it build east- southeastward into northern OH by 12Z Monday. A 2-4 mb pressure gradient along the southern rim of the low-level ridge will maintain light-moderate NNE flow, with weak CAA expected to be offset by strong insolation today, providing highs in the 75-80F range for most valley locations (lower 70s atop the Cumberland Plateau).
124 PM EDT Sun Sep 7 2025 - Cool again today with highs in the 60s and lows in the lower 40s. Some areas of patchy fog are possible late tonight as the center of high pressure reaches SE MI. Upper level confluence will then drive the weather for the middle of the week as persistent surface ridging holds on over the region.
This afternoon, high pressure is centered along the mid to upper Mississippi Valley resulting in fair weather and light winds across central Illinois. Temps will bottom out in the low to mid 40s once more tonight under a favorable radiational cooling setup. A strong upper ridge currently centered over the western CONUS will shift east across the Great Plains through the latter half of the upcoming week.
High pressure is nudging eastward across eastern Iowa at this hour, shifting toward the Chicago area by this evening. Meanwhile, ridging aloft nudges eastward out of the Rockies and into the Plains in response to a deep trough nudging inland from the West Coast.
(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.
Temperatures will only top out in the low to mid 80s this afternoon, which is about 5 to 10 degrees below average for this time of year. But again, the bigger story will be the lower humidity across the region. With the high staying to the northeast of our area, surface winds across the region will remain northeasterly due to the clockwise flow associated with High pressure.
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.
An upper trof over the eastern CONUS weakens through Monday then is rejuvenated through midweek by a system which advances from the Plains.
1131 AM CDT Sun Sep 7 2025 - Cooler weather will persist through Monday with highs mostly in the 70s.
Weak surface through lower level troughing remains dug in over the eastern Gulf and Florida. This along with an early season mid latitude trough blanketing the eastern United States has contributed to a persistent band of very high precipitable water and weak lower level confluence across our region. Troughing will remain to our north across the Gulf and the Florida Peninsula while the Atlantic ridge will ebb and flow across the Bahamas and Cuba. This trough will finally wash out heading into mid week.
228 PM EDT Sun Sep 7 2025 Broad troughing remains aloft over the eastern half of the U. this afternoon while at the surface, a weak area of low pressure lingers over the eastern Gulf as a frontal boundary slowly moves over northern Florida. Increased rain chances will continue really through mid-week as the upper-level trough swings gradually swings eastward and the frontal boundary very slowly sinks southward across the peninsula.
249 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.
This trough will finally wash out heading into mid week.
High pressure will dominate with dry and generally quiet conditions for this week. 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.
1231 PM CDT Sun Sep 7 2025 Updated at 1229 PM CDT Sun Sep 7 2025 - Cooler weather continues today into early this week, followed by a gradual warmup through the week.
-Dry air and cooler temperatures leading to a pleasant short term. Not expecting much in the way of impactful weather but isolated storms could clip those counties with dewpoints showing up in the low to mid 70s and temps near 90. Expecting a similar pattern tomorrow with mainly dry conditions across much of the area with the cold front truly out of north and central Georgia. The main other story will be cooler temperatures with highs in the mid 70s (mountains) to low 80s across the area with lows int the upper 50s to low 60s.