Aikyam-Lab/Synoptic-Bench huggingface dataset:
125 AM EDT Sun Sep 8 2024 On the heels of a cold frontal passage, high pressure will build in through Sunday night. NW winds will bring in much drier and cooler air overnight. High pressure builds in at the surface, but an upper level trough remains over the northeast through Sunday night. A cooler and drier airmass moves into the region, and high temperatures will peak at 5 to nearly 10 degrees below seasonal normals.
Temperatures were in the lower 70s to lower 80s and dew point temperatures were in the mid 40s to mid 50s. Synoptically, upper ridging was positioned over the Four Corners Region with a deep closed low and associated upper trough over the Great Lakes. At the surface, stout high pressure will move S/SE across the Mid and Upper MS Valley. Given the cooler and drier airmass in place across the region in combination with sustained N/NE winds, below average temperatures are expected through the period.
1046 PM CDT Sat Sep 7 2024 Cool high pressure is building across the region with clear skies and light NE winds. SJM A cool and dry ridge of high pressure will bring fall-like temperatures to the Mid-South this weekend.
(Sunday through Monday) Post frontal airmass continues to work into the ArkLaTex this morning as area ASOS/AWOS sites advertise temperatures in the upper 50's to low and mid 60's, with dew point temperatures sitting comfortably in the low to mid 50's. MaxT's will be a few degrees warmer when compared to Sunday, but should still remain below average with temps in the mid to upper 80's advertised in this package.
(Today through Monday) Dry high pressure from the northwest will continue to expand across the region.
1025 PM CDT Sat Sep 7 2024 - Much cooler temperatures and lower humidity this weekend.
Strong subsidence from this ridge can easily be seen from the dry profile on model soundings.
An upper-level ridge will begin to deamplify and shift into the Central Plains. This, combined with southerly flow at the surface will lead to warmer temperatures this coming week.
By this afternoon, highs will top out in the low to mid 80s which is 5-10 degrees below normal for this time of the year. Temperatures across the region will be in the lower to mid 50s as radiational cooling is expected to be in full force. The Dallas/Fort Worth Metroplex is likely to be the warmer spot with upper 50s expected due to the Heat Island effect. Tropical development is favored in the Gulf with the low pressure most likely to gradually track northward along or near the Texas Coast over the next several days. Precipitable water values will reach their postfrontal minimum under 1/2 inch, the driest column since spring and among the lowest on record for this early in the season.
Highs today are expected to rise into the lower to middle 70s, or around normal for this time of year. Despite the clearing skies, continued warm air advection will keep temperatures warmer than previous nights. Warm air advection will continue on Monday as upper level ridging becomes entrenched across the western Great Lakes region and 850 mb temperatures soar into the middle teens.
Upper air pattern consists of a 500 mb closed low over southwest Quebec with a ridge over the Rockies. The upper low moves into southern Quebec by 00z Mon while the ridge moves into the plains. Midlevel ridging builds in in a more concerted fashion on Monday from the west. For the remainder of the upcoming week, high confidence in seasonably warm and dry weather as ridging continues to build with time in response to deepening troughing in the west.
126 AM EDT Sun Sep 8 2024 High pressure will reside over our area for the upcoming week keeping us dry.
These favorable conditions will continue through the overnight which will lead to anomalously cold lows around the low to mid 40s. Synopsis: Surface analysis early this afternoon shows strong high pressure in place over MN/WI/IA. Aloft, strong ridging was in place over the Rockies, while a deep upper low was found over Ontario. Models suggest the the upper ridge in place over the Rockies will slowly continue to shift eastward reaching the western plains by Sunday night. All of this will impact the surface with the arrival of the strong high pressure system over the upper midwest settling across IL/IN. On Sunday, plenty of sunshine will be in play and high temperatures should be slightly warmer than persistence, reaching near 70 degrees.
Dry and cooler through Sunday for an early fall feel. Temperatures will run below normal especially tonight, when temperatures will drop enough to make a run at some record lows, with the records at Tri-CIties and Oak Ridge expected to be the most threatened.
1112 PM MDT Sat Sep 7 2024 - Warmer Sunday with isolated afternoon and evening showers and thunderstorms in the mountains and over the far northeast plains. - Low chances (10-30%) for showers and thunderstorms most days and mainly over the higher terrain.
109 AM MDT Sun Sep 8 2024 -Hot weather returns this week -Elevated fire weather conditions much of the week, with near critical conds at times -Shower chances return toward the later part of the week, along with slightly cooler weather Upper level ridge over the western NOAM will shift east this week, supporting hot temps with mainly dry weather. Expect mostly sunny skies today with warmer temps as highs will top out in the mid to upper 80s to low 90s.
Through Tonight: An upper-level low continues to progress eastward across southern Ontario and Quebec this morning with the back edge of its associated trough over the western Great Lakes. Thus after a chilly start to the day, temperatures will rebound into the low to mid-70s this afternoon.
Upper level low rotates north of our region throughout the day keeping westerly flow in place as well as wrap around moisture. Otherwise cooler temperates stick around today with forecasted highs in the low to mid 60s across the region. Temperatures overnight will range in the low to mid 40s across most of the region with lighter winds. The western finger lakes region will see temperatures in the low 50s. Showers quickly dissipate during the late overnight hours as high pressure builds into the region with dry conditions then lasting through the rest of the short term period.
Lows are expected to drop into the 40s CWA-wide, with the one exception being the heart of the Chicago urban heat island where lows should hold in the lower 50s.
1225 AM CDT Sun Sep 8 2024 Surface analysis shows high pressure centered over the Quad Cities, with a ridge axis extending southwest from there across the forecast area. Cooler and drier conditions were also observed this afternoon with temps in the 70s to lower 80s.
641 AM EDT Sun Sep 8 2024 * Chilly start to the morning gives way to a slightly warmer day with highs expected to reach around 70 today. Chilly start to the morning will give way to a warmer albeit still below normal day as the upper trough begins to gradually peel away to the east. As the western edge of the aforementioned upper trough begins to vacate the central Great Lakes late tonight-early Monday, pool of vorticity is progged to cascade out of northern Ontario.
(Today through Monday night) A large upper low over extreme SW Quebec will lift NE through Monday as the associated upper trough shifts E over the W Atlantic. At the surface, a cold front across the S portion of the County Warning Area (CWA) will continue to move S and become diffuse. High temperatures on Monday will be mostly in the lower to mid 80s with mid 70s in the NE mountains. Low temperatures Monday night will range from the lower 50s in the NE to the lower 60s in the extreme S.
Upper level analysis places broad ridge stretching northward from the Four Corners Region to the lee of the Canadian Rockies, while low pushes to the northeast of the Great Lakes. For today, dry conditions continue over the area with the ridge in place to the west, while the ongoing warming trend should push temperatures up into the 80s over most locations, though a few 90s can not be ruled out. Late day into the evening, a short wave pushing through the ridge makes its approach.
616 AM CDT Sun Sep 8 2024 (Today) High pressure will continue to reign supreme across eastern Oklahoma and western Arkansas today with mostly sunny skies and below normal temperatures anticipated.
By this afternoon, highs will top out in the low to mid 80s which is 5-10 degrees below normal for this time of the year. Temperatures across the region will be in the lower to mid 50s as radiational cooling is expected to be in full force. The Dallas/Fort Worth Metroplex is likely to be the warmer spot with upper 50s expected due to the Heat Island effect. /Issued 320 AM CDT Sun Sep 8 2024/ /Monday Night Onward/ A warming trend will begin during the midweek period as a mid level ridge strengthens overhead.
A cooling trend will set up over western Washington as troughing returns to the region.
- Dry with much warmer temperatures this week. High pressure is centered over southeast Iowa and into parts of Illinois and Missouri early this morning. This area of high pressure will settle southeast and eventually reach from the east coast to Texas.
609 AM CDT Sun Sep 8 2024 (Today through Monday) Dry high pressure from the northwest will continue to expand across the region.
640 AM CDT Sun Sep 8 2024 (Today through Monday afternoon) Weak mid level ridging will maintain its presence over the area early this week. Deep easterly flow will also keep temperatures in check with highs generally in the low to mid 80s and very comfortable lows in the 50s.
(Rest of Today) Current temps have climbed into predom the lower 60s from their earlier lows in the upper 40s/mid 50s. A large dome of high pressure also continues to settle into the Midwest/OH Valley regions, providing a NE flow around 5-10MPH into the central TN Valley this Sun morning. Given the strong subsident pattern in place, skies should remain mostly sunny thru the afternoon hrs, as highs climb mainly into the lower 80s/near 80F.
A few communities mainly in the Lower Keys have received a nice spritz of rain, but the remainder of the island chain has remained dry. High pressure extending across the Florida Peninsula continues to dominate our sensible weather and is maintaining moderate east to southeast breezes. Otherwise, temperatures will reach the lower 90s by this afternoon, but the heat index should remain below 108 degrees. High pressure over the western North Atlantic extending westward into South Florida will maintain gentle to moderate east to southeast breezes across the Keys coastal waters through midweek. On this day in 1965, Category Three Hurricane Betsy moved west across the Upper Keys, through Florida Bay and north of the Lower Keys.
Today will be mostly dry as the Tri-State area sits along the leading edge of the upper ridge. The low-level jet seems to be the main driver of any precipitation, similar to what we saw overnight. Temperatures will be slightly warmer with highs in the 80s to around 90 degrees across the Tri-State area and overnight lows in the 50s to lower 60s. Monday will be a bit warmer with highs in the lower 90s and overnight lows in the 50s to lower 60s once again. Skies are forecast to remain mostly clear with no chances for precipitation as ridging remains over the area with dry air near the surface.
648 AM EDT Sun Sep 8 2024 High pressure will reside over our area for the upcoming week keeping us dry.
Late week will see a 500 mb low move into Idaho but latest trends indicate 500 mb ridge building north and strengthening Thu-Sat period and lessening precip chances compared to 24 hours ago. Temperatures will be warming considerably today as 850 mb warm advection is taking place with warmest temps today being northern Red River valley where upper 80s are possible esp along the Pembina escarpment ridge from west of Park River up to west of Morden MB.
Given the southerly flow in the lowest 3 km, this should advect at least a little farther to the north this morning.
605 AM CDT Sun Sep 8 2024 (Today through Monday night) Mid to upper level high pressure is present over the Four Corners Region with northwest flow aloft for the FA today and tomorrow. Influence from the high pressure will continue to bring near normal to slightly above normal daytime temperatures both today and tomorrow, in the upper 80s to lower 90s. Tomorrow, is more likely to see the higher end of these ranges with a slightly stronger gradient in place.
515 AM EDT Sun Sep 8 2024 High pressure will reside over our area for the upcoming week keeping us dry.
Highs remain forecast to reach into the lower 80s F north of I-20 with middle 80s F elsewhere today with a north breeze. With this post-frontal air we can expect dry conditions with min RHs ranging form the mid 20s to the mid 40s north to south and daytime RHs in the low 70s. The area will also experience some increased winds today as the cooler air filters through the area limiting high temperatures areawide to the upper 70s to low 80s. On a wider scale a large area of high pressure sits across much of central CONUS keeping conditions quiet with just some lingering cloud cover along the previously mentioned front through the near term.
With this post-frontal air we can expect dry conditions with min RHs ranging form the mid 20s to the mid 40s north to south and daytime RHs in the low 70s. The area will also experience some increased winds today as the cooler air filters through the area limiting high temperatures areawide to the upper 70s to low 80s. On a wider scale a large area of high pressure sits across much of central CONUS keeping conditions quiet with just some lingering cloud cover along the previously mentioned front through the near term.
We remain in northwest flow aloft in wake of an upper low that influenced the area a few days ago. Pattern/synopsis: Large/cool high pressure is over central IL. One area of low pressure is departing across Quebec. Warm advection and filtered sunshine today will allow for warmer temps, with highs in the upper 60s to lower 70s. Higher heights aloft will begin to build in Monday as a broad upper level ridge starts to move eastward.
1037 AM EDT Sun Sep 8 2024 Brisk and cooler than normal temperatures this afternoon with isolated showers over southern Adirondacks and the Lake George Region this afternoon. Max temps will run 5-10 degrees below normal with highs in 60s in the valleys and 50s over the higher terrain. Highs in the mid 60s to near 70 and cooler in higher terrain. Upper low just north of the U.
This setup will also result in a temperature gradient with highs in the mid 80s where the sun is able to poke out and in the low 80s where clouds are prominent both days.
309 AM MDT Sun Sep 8 2024 KEY MESSAGES: 1) Upper ridging will bring hot weather to northeast MT through Monday.
Another system will bring cooler temperatures and a chance for widespread rain during the middle of the week. Regional radar imagery shows scattered showers have mostly shifted east of the Cascades early Sunday morning as an upper level trough lifts inland across the state or Oregon. This has ushered in increased onshore flow west of the Cascades, with marine air pushing into the Coast Range gaps and surface observations showing much improved humidity recoveries for all but the highest Cascade slopes above about 4000 feet.
730 AM EDT Sun Sep 8 2024 (Today through Monday) South Florida remains under the influence of western Atlantic high pressure while a surface boundary meanders over northern Florida. The eastern United States remains under the general influence of a trough with an associated deep-layered low around the Great Lakes that will be moving northward into arctic Canada in the next couple of days.
637 AM EDT Sun Sep 8 2024 Brisk and cooler than normal temperatures close the weekend with isolated showers over the Adirondacks today. Highs in the mid 60s to near 70 and cooler in higher terrain. Upper low just north of the U.
A cooling trend will start today across central California as an upper level high pressure system begins to weaken over the next few days.
711 AM CDT Sun Sep 8 2024 Fall-like temperatures will finish out the weekend as high pressure continues to dominate the weather pattern.
615 AM EDT Sun Sep 8 2024 Canadian high pressure will extend across the middle Atlantic, while gradually modifying, through most of the upcoming work week. The cold front has pushed through the Carolinas and in its wake high pressure over the MS valley will slowly edge eastward toward the southern Appalachians. As the trough axis to our west finally slides through overnight, we should see a more W to NW flow take over aloft, favoring a slow erosion of the cloud deck over our southern zones. West to northwest flow aloft will weaken in the day/night as ridging over the TN valley shifts eastward. High pressure will remain in place across the southern Appalachians.
525 AM MDT Sun Sep 8 2024 -Hot weather returns this week -Elevated fire weather conditions much of the week, with near critical conds at times -Shower chances return toward the later part of the week, along with slightly cooler weather Upper level ridge over the western NOAM will shift east this week, supporting hot temps with mainly dry weather. Expect mostly sunny skies today with warmer temps as highs will top out in the mid to upper 80s to low 90s.
622 AM EDT Sun Sep 8 2024 Brisk and cooler than normal temperatures close the weekend with isolated showers over the Adirondacks today. Highs in the mid 60s to near 70 and cooler in higher terrain. Upper low just north of the U.
A beautiful early September day is unfolding as high pressure from the Midwest begins to ridge across the area. An upper H5 trough to the N/NW will remain in place as it weakens thru Monday. Readings will drop into the low/mid 40s for the southern Poconos, Lehigh Valley and north NJ. The only potential blip in the continued period of tranquil weather will come late Monday into Monday evening as a trailing mid and upper level trough crosses through the region.
Weakening upper trough will continue to track through the region bring additional chances for storms Sunday for eastern NV and Monday for central NV.
As we remain on the backside of the exiting upper-level trough, sinking air leading to higher pressure will remain dominant through most of the week. These amazingly cool temperatures are unfortunately going to depart us come tomorrow as ridging aloft starts to build over the southeast.
Most Recent surface analysis shows low pressure over western Nebraska this afternoon. At the upper levels, ridge sits over the lee side of the Rockies into the northern and central plains, while upper low sits off the New England region.
213 PM CDT Sun Sep 8 2024 - Temperatures climb the next several days, turning much warmer by the middle of the week. Surface analysis early this afternoon depicts high pressure centered over central Illinois, keeping things cool and dry to close out the weekend. Temperatures will climb the next few days, becoming much warmer by midweek as upper ridging builds further east and amplifies.
353 PM EDT Sun Sep 8 2024 An upper level low will remain over the region tomorrow, and it will cause a few showers to develop.
A trough is expected to move into the western states by the middle of the week, leading to a quick cooling trend, drier weather, a deeper marine layer, and areas of gusty winds. WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO Hot conditions are on track to continue into Monday with the ridge of high pressure over the Western United States. High pressure aloft is suppressing the marine layer, preventing that cooler marine air from moving inland. As the ridge weakens and gets pushed to the west due to a trough moving into the Pacific Northwest, the marine layer will be allowed to deepen and rebuild. An inverted trough over northwestern Mexico will provide light east flow aloft with continued monsoonal moisture. Available moisture will begin to decrease Monday with the trough looming to the north and the high weakening.
150 PM EDT Sun Sep 8 2024 * High pressure will remain nearly stationary over the region through the end of the week, bringing abundant sunshine and dry weather for most. An upper low over Southern Quebec is progged to pull away from the region today, as surface ridging builds in from the Ohio Valley. In general, expect daybreak readings in the low to mid 40s. However, the cooler valleys of Laurel Highlands will likely dip into the upper 30s.
Current temperatures are in the low to upper 80s with dew points in the mid to upper 70s and heat index values between 90-102. The highest coverage is forecast north of Melbourne to western Okeechobee county (PoPs ~60-80%) with scattered showers (PoPs ~40-50%) and isolated to scattered lightning storms to the south. Afternoon highs in the low to mid 90s with heat index values as highs as 100-107 are forecast.
144 PM EDT Sun Sep 8 2024 Brisk and cooler than normal temperatures this afternoon with isolated showers over southern Adirondacks and the Lake George Region. Max temps will run 5-10 degrees below normal with highs in 60s in the valleys and 50s over the higher terrain. Upper low just north of the U.
Cumulus is starting to form across the higher terrain of NM/CO with a few showers or storms beginning to form. These showers and storms should be able to move off of the higher terrain this afternoon through this evening aided by very weak H500 northwest flow. Highs this afternoon should be a few degrees warmer than yesterday, with some locations reaching the mid 90s. High pressure aloft continues to have an influence across the Southern High Plains on Monday which will lead to dry conditions given northwesterly flow turning more northerly during the daytime hours.
Temperatures in the 80s expected in the lower valleys and mid/upper 80s at that, so above normal for this time of year.
233 PM CDT Sun Sep 8 2024 High pressure in control brought with it fair skies and a supremely pleasant morning and with a north breeze and below normal highs in the middle 80s F this afternoon, we'll continue to enjoy this calm before the storm through tonight and into Monday. Evapotranspiration processes will allow our humidity to begin to recover a bit despite the mostly neutral moisture advection from recycled continental air and we'll be a bit warmer and more humid Monday than today. Highs likely in the upper 80s F to near 90 F with dewpoints recovering from the 40s F today to the lower 60s F particularly north of I-20.
1208 PM CDT Sun Sep 8 2024 Late morning surface analysis places a 1025 mb ridge of high pressure centered over north central Missouri. CJC Fall-like temperatures will finish out the weekend as high pressure continues to dominate the weather pattern.
The ridge of high pressure will have moved east of the Northern Rockies, leaving us under westerly flow aloft.
Otherwise, weather will remain fairly benign with high pressure settling to our south over the Ohio River Valley. Still expecting to see the upper-level ridge axis slide eastward through the week bringing a return of summer-like temps into the mid to upper 80s by the middle of the week. Otherwise, high pressure today will continue to promote dry conditions. Breezy west- southwest winds to around 20 mph will advect in a warmer air mass, and high temperatures will rise to into the 70s, with upper 70s more likely toward the Wisconsin River Valley region.
Quiet/seasonably cool conditions are then expected into the overnight period, as a strong dome of high pressure settles more into the OH Valley states. A light NE flow should allow lows into early Mon to fall mainly into the lower/mid 50s for most spots, which is around 10F below normal for this time of the yr.
Discussion: High pressure and dry air will remain in control of our weather for the short term period. Daily Record Low Minimum Temperatures Date Chattanooga Knoxville Tri-Cities Oak Ridge 09-09 49(1958) 46(1984) 43(1998) 47(1958) (Monday night through next Sunday) Key Messages: 1.