Aikyam-Lab/Synoptic-Bench huggingface dataset:
An Omega pattern remains in place across the country with the ridge axis stretching from Texas to Minnesota. A weak disturbance will lift north across the Plains, then turn east and crest the ridge this afternoon and evening across the southern half of Minnesota and Wisconsin.
940 PM PDT Thu Sep 11 2025 * Low pressure brings breezy afternoon winds, below average temperatures, and isolated precipitation through tomorrow.
Ridging overhead will continue to rule the weather pattern to end out this work week.
1012 PM CDT Thu Sep 11 2025 - Above normal temperatures will persist for the foreseeable future with an upper-level ridge dominating our region. - Rain chances will remain nil through this same period given the strength of the ridge and the lack of any forcing. Dominant ridging at the sfc and aloft will maintain an upward trajectory of temperatures with afternoon highs generally ranging from the mid to upper 90s on Friday.
343 AM EDT Fri Sep 12 2025 High pressure remains in place over the next several days, bringing mostly sunny skies and mild temperatures.
The Ozarks continue to remain under the influence of deep high pressure, with an upper-level ridge dominating the majority of the country. Highs yesterday topped out in the low to mid 90s with calm and clear conditions. More of this can be expected as the high pressure continues to build in this weekend.
146 AM EDT Fri Sep 12 2025 High pressure continues to keep the region dry for the foreseeable future. High pressure remains overhead today and tonight.
An omega block pattern is developing over the Central Plains with troughs located along the East Coast and over the Great Basin. The ridge is expected to strengthen and expand northward into the weekend.
Latest satellite imagery shows 500hpa ridge axis nosing up through central MN with western CONUS trough continuing to deepen across the ID/NV areas. SW flow aloft continues to bring ejecting waves out of the 500hpa trough over the CWA. At the surface, low pressure is located in SW SD with an inverted sfc trof poking northeast through central SD and into central ND.
1109 PM CDT Thu Sep 11 2025 The upper-level weather pattern across the CONUS for the next several days will primarily feature an ridge overspreading our forecast area from the west. At the surface, high pressure centered over the eastern U. will reinforce dry flow into our region in the lower levels. Collectively, the dry and subsident pattern will result in temps pushing the mid to upper 90s - about 5-10 degrees warmer than normal for mid September.
A carbon-copy forecast is anticipated as the upper-level ridge will remain in place over the southern Plains with light southeast flow at the surface. Models show 850mb temperatures of 20-22 deg C during the day, which should support afternoon highs in the low to mid 90s. Once again, the warmest highs will be across the Big Country where a thermal ridge remains the strongest.
Scattered showers and thunderstorms developing on Friday over the higher terrain with localized MVFR/IFR conditions and mountain obscuration.
An upper level ridge is forecast to shift over the Mid to Upper Mississippi Valley region from the west. SSE to S flow in the low-levels will result in increasing warm air and moisture advection into eastern Iowa and northwest Illinois, leading to an uptick in humidity with dewpoints reaching the lower 60s. This Weekend: Anomalously warm 850mb temperatures in the lower 20s (C) and plenty of sun will lead to impressive mid September heat this weekend with highs in the low to mid 90s for most locations.
150 AM CDT Fri Sep 12 2025 The upper-level weather pattern across the CONUS for the next several days will primarily feature an ridge overspreading our forecast area from the west. At the surface, high pressure centered over the eastern U. will reinforce dry flow into our region in the lower levels. Collectively, the dry and subsident pattern will result in temps pushing the mid to upper 90s - about 5-10 degrees warmer than normal for mid September.
(Tonight through next Thursday) The upper pattern over the CONUS continues to consist of western and eastern troughs, with an amplifying ridge in between over the Plains. Northwesterly flow currently sits across the region behind the eastern trough, which is slowly propagating eastward. Height rises behind this trough have allowed for surface temperatures to increase today with observed highs in the low to mid 90s. These temperatures will slowly rise over the coming days as ridging to the west amplifies and brings gradual height rises through this weekend.
124 AM EDT Fri Sep 12 2025 High pressure will maintain dry conditions into the weekend with warm sunny days and cool nights with patchy frost across the north.
402 AM EDT Fri Sep 12 2025 * Dry/rain-free stretch forecast to continue across central Pennsylvania with seasonably warm temperatures through the last week of astronomical summer Noticeably cooler (-5 to -10F vs. last night) and drier/less humid start today across the lower Susq Valley. IR sat trends indicate there will be some predawn to post sunrise valley fog to contend with early this morning; otherwise we expect another stellar to seasonably warm day in CPA courtesy of high pressure migrating southeastward from the Ontario/Quebec border to Downeast Maine.
Low temperatures otherwise should cool into the low/mid 60s with light winds.
140 AM EDT Fri Sep 12 2025 High pressure will dominate the weather pattern through the next seven days with dry conditions and near to above normal daytime temperatures. Key message(s): - High pressure will provide fair weather with seasonable high temperatures. The axis of a negatively tilted upper trough will move over the area today, then shift to the east tonight.
Water vapor imagery and upper air balloon data show a longwave 500 mb trough axis extending down the Appalachians and into the the western FL Panhandle.
627 AM EDT Fri Sep 12 2025 High pressure remains in place over the next several days, bringing mostly sunny skies and mild temperatures.
650 AM CDT Fri Sep 12 2025 The upper-level weather pattern across the CONUS for the next several days will primarily feature an ridge overspreading our forecast area from the west. At the surface, high pressure centered over the eastern U. will reinforce dry flow into our region in the lower levels. Collectively, the dry and subsident pattern will result in temps pushing the mid to upper 90s - about 5-10 degrees warmer than normal for mid September.
348 AM PDT Fri Sep 12 2025 * Low pressure brings breezy afternoon winds, much below average temperatures, and isolated precipitation to some areas through tomorrow.
H5 analysis overlaid with water vapor imagery shows a 593 dam H5 high over west Texas, with relatively high amplitude upper ridging extending northward through the Northern Plains. Meanwhile, our region resides beneath northwesterly mid level flow on the eastern edge of the upper ridge and west of upper troughing across portions of the eastern CONUS. As we head into this afternoon, the upper ridge axis shifts further east, essentially directly overhead our CWA.
758 AM EDT Fri Sep 12 2025 High pressure will maintain dry conditions into the weekend with warm sunny days and cool nights with patchy frost across the north.
- Temperatures will peak 10-15 degrees above normal across the region this afternoon (in the low to mid 90s).
Chattanooga Airport, TN 60 88 60 89 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 57 84 59 86 / 0 0 0 0 Oak Ridge, TN 57 85 58 87 / 0 0 0 0 Tri Cities Airport, TN 54 81 55 83 / 0 0 0 0.
An Omega pattern remains in place across the country with the ridge axis stretching from Texas to Minnesota. A weak disturbance will lift north across the Plains, then turn east and crest the ridge this afternoon and evening across the southern half of Minnesota and Wisconsin. A hot airmass to the south characterized by 925 mb temps exceeding +27C will send highs into the low to mid 90s. Cooler air to the north and southeast flow will keep highs elsewhere in the mid 80s.
Best (40-60%) rain chances will be over southeast New Mexico and the higher terrain in West Texas Saturday afternoon and evening. (Today through Saturday afternoon) High pressure remains over central Texas this morning with an upper level low near the Great Basin in the western U. The high over Texas will exert a greater influence over our weather today keeping temps unseasonably warm with highs in the upper 80s to lower 90s. Moisture circulating around the high should remain west of the CWA and any rain showers should be west of the Guadalupe Mountains. The low to the west moves east tomorrow, increasing moisture in the western half of the forecast area and increasing rain chances significantly (30-60%) for southeastern New Mexico south to the Big Bend.
- A cold front will impact the area Saturday, bringing cooler temperatures through the weekend.
Another pleasant late summer day in September is setting up with high pressure building in from southern Ontario. The strong subsidence from the anticyclone will yield mostly sunny to sunny skies. High pressure will build in this afternoon resulting in continued dry conditions and seasonable temperatures through Saturday.
331 AM PDT Fri Sep 12 2025 * Low pressure brings breezy afternoon winds, much below average temperatures, and isolated precipitation to some areas through tomorrow.
The stalled boundary remains across south Florida with high pressure over the eastern U. An upper level trough is expected to move across today will finally push the front east of the area later today and into Saturday.
We could also see a strong storm or two over the higher elevations, but modest instability will limit the severe potential. South-southwesterly flow aloft should continue into tomorrow as a trough axis slowly advances east towards Colorado by Friday morning. The expansive cloud cover, along with cooler mid-level temperatures from the approaching trough, should keep temperatures several degrees cooler than today (upper 70s to low 80s). We'll see how much of that moisture can make it into the lower elevations.
Windy conditions will continue today, with lighter winds and cooler temperatures arriving over the weekend. A fairly strong closed low for this time of year was centered over western Nevada this morning. Increasing pressure gradients ahead of the low will continue to bring windy conditions for one more day, with gusts in the 30-40 mph range developing by mid to late morning and continuing through around 7 PM. Daytime temperatures will be a couple degrees cooler today through Saturday as well. By the weekend - much drier air is forecast to sweep eastward as the low advances into our region, ending the chance of storms.
1023 AM EDT Fri Sep 12 2025 After a predawn cold frontal passage today, high pressure will be in control through Saturday.
For Friday & Saturday: Georgia will find itself on the backside of a weak upper level trough during this period. The 1% could occur in isolated parts of the north Georgia mountains between 4 PM and 9 PM today, where differential heating over the higher terrain could lead to shallow convection and a brief light rain shower. Afternoon highs will reach into the 80s while morning lows will dip into the low 60s.
632 AM EDT Fri Sep 12 2025 High pressure continues to keep the region dry for the foreseeable future. High pressure remains overhead today and tonight. RH values will recover overnight due to the expected cooler temperatures. Quiet weather is in store for the weekend as dry weather continues due to high pressure overhead.
606 AM CDT Fri Sep 12 2025 (Today through Saturday) A 500mb trough axis will move southeast of the area today reinforcing the dry, northerly flow across Central Alabama. Persistent and expansive ridging centered just to our west will lead to near identical conditions on Saturday.
206 AM PDT Fri Sep 12 2025 Updated at 1200 AM PDT Fri Sep 12 2025 * A strong upper trough with Pacific moisture will push in from the NW bringing a return of showers and thunderstorms, as well as cooler temperatures through Saturday. (Today through next Friday) WEATHER PATTERN OVERVIEW: Current weather pattern depicts an elongated upper trough across northwestern Nevada with upper ridging over Texas. Highs will be cooler than normal with readings in the 60s and 70s. On Saturday, all models are showing the upper trough axis slowly exiting to the east into Utah during the day.
508 AM EDT Fri Sep 12 2025 After a predawn cold frontal passage today, high pressure will be in control through Saturday.
632 AM EDT Fri Sep 12 2025 High pressure will dominate the weather pattern through the next seven days with dry conditions and near to above normal daytime temperatures. Key message(s): - High pressure will provide fair weather with seasonable high temperatures. The axis of a negatively tilted upper trough will move over the area today, then shift to the east tonight. The omega block upper pattern should persist on Saturday with strong ridging across the middle of the country with an upper trough over the northern Rockies and another off the East Coast.
(Tonight through Saturday night) For those looking for a cooler end to the work week, this "Fry-day" might not be your cup of tea. High pressure and sunshine stay in control today, forcing temperatures to the upper 80s and low 90s once again. Tonight into Saturday, our upper level pattern will begin shifting to southwest flow as a large upper level low reaches the Plains. Into the afternoon and evening, additional disturbances will round the base of the trough. Cloud cover and showers will keep temperatures cooler for the western Panhandles (highs in the 70s to low 80s), while mid 80s to low 90s are forecast elsewhere.
600 AM CDT Fri Sep 12 2025 - Warmer on Friday and Saturday, with highs mainly in the upper 80s to lower 90s.
Early morning upper air and satellite analysis indicates an upper level low is centered north of Reno, NV. Similar conditions are expected Saturday as the trough axis finally passes overhead.
H5 analysis overlaid with water vapor imagery shows a 593 dam H5 high centered over Texas, with relatively high amplitude upper ridging extending northward through the Northern Plains and Upper Midwest with upper troughing across portions of the eastern CONUS. As we head into this afternoon, the upper ridge axis shifts further east, essentially directly overhead our CWA.
A slow moving upper level low will impact the region through Saturday.
Weak high pressure builds over the interior with dry conditions through early Saturday.
642 AM EDT Fri Sep 12 2025 High pressure will build in today resulting in continued dry conditions and seasonable temperatures through Saturday.
The last few showers from the departing trough occurred over the east side last night. High pressure will build in today with the most pronounced warming on the east side. Readings there will be rising mainly to the 70s, about a dozen degrees warmer than yesterday, but still generally a few degrees below normal. Meantime, coastal highs will be seasonable and west side highs will be near normal and trend a few degrees warmer than yesterday.
747 AM EDT Fri Sep 12 2025 High pressure crosses the region today through tonight, then exits across the Maritimes Saturday.
- Warmer temperatures mainly in the 70s from Friday onward. Fog has been dense at times with many spots showing visibility occasionally falling below a quarter mile, but given that this lower end has been more hit-and-miss, will continue to handle this with the SPS rather than a headline. In spite of increasing clouds, temperatures climb higher than in previous days thanks to southerly flow bringing in a warmer airmass. Expect temperatures to climb from morning lows in the 40s and 50s to highs in the lower to mid 70s. Skies turn sunny into the weekend as ridging recovers behind the exiting wave. Temperatures starting off in the 50s rebound into the lower to mid 70s across most of the area, but the interior-western and south-central UP may reach even higher into the upper 70s.
751 AM EDT Fri Sep 12 2025 After a predawn cold frontal passage today, high pressure will be in control through Saturday.
- Warmer temperatures mainly in the 70s through the forecast period. Observations from around the area show a pleasant early fall day across Upper Michigan, with temperatures generally in the 70s this afternoon as a positively tilted upper level ridge extends over the region from the Great Plains. Mid and high level cloud cover is beginning to stream into the area from the west in association with an upstream disturbance riding over the top of the ridge.
Otherwise, scattered cumulus fields are developing over the high elevation ridges of the eastern mountains, with radar having picked up a weak shower or two moving south from the Wallowa mountains. Today through Saturday: An upper low that has fueled showers and thunderstorms across the area the past several days has moved off into the ID this morning, with the forecast area on the northerly flow side of the low. Much like previous days, modest CAPE (250-750J/kg), and modest lower to mid level lapse rates will allow thunderstorms to develop fairly quickly (pulse) through the afternoon, however storms will be slow moving as steering flow is fairly weak (10-15kts) in the lower and mid levels. By Saturday, drier conditions will settle into the region as transient ridging slides across the PacNW.
(This evening through Saturday) Expect a mainly dry and very warm forecast due to high pressure aloft across the area.
220 PM EDT Fri Sep 12 2025 High pressure centered to our north will extend down through the Mid Atlantic and the Carolinas through the weekend, although a northeasterly wind flow and passage of an upper level trough into the region will bring periods of clouds each day. -GIH High pressure will be centered over southeastern West Virginia Saturday morning and will move little over the next 24 hours. Highs will be similar or slightly cooler than today's values, generally around 80 degrees. Lows will also be slightly cooler, mostly in the 50s.
139 PM EDT Fri Sep 12 2025 High pressure slides southeast across New England tonight into Saturday.
An upper level trough is weakening over the area today as it moves eastward.
- Highs 75-85 today cools into the lower 70s Saturday.
5" across much of South Texas as a mid-level ridge shifts over the area. During next work week, a mid-level trough will swing eastward across the Great Plains, leading to a few weak mid-level disturbances over South Texas.
Vertical development will be limited with high pressure across much of the northeast US. As high pressure slides off to the east, an upper level low will dig into eastern Canada Saturday with a trailing weak cold front passing through western NY.
A mid and upper level ridge is building over the Southern Plains and into the Middle Mississippi River area. This will continue to slowly progress eastward overnight before dropping south on the other side of the ridge toward morning.
Today through Saturday: An upper low will continue to push across the eastern half of the PacNW today and slowly push east into the northern Rockies through Friday night. By late tonight, shower/thunderstorm activity will retreat to far northeast OR and southeast WA, then will diminish by late Friday evening as the low pushes further east of the region. Plenty of moisture support from the upper low, modest CAPE (250-750J/kg), and modest lower to mid level lapse rates allow thunderstorms to develop fairly quickly through the afternoon, however storms will be slow moving as steering flow is fairly weak (10-15kts) in the lower and mid levels. By Saturday, drier conditions will settle into the region as transient ridging slides across the PacNW.
KCCX really picking up the updrafts/thermals on top of the ridges, likely thanks to the bugs floating around and being lifted. High pressure will dominate for many days.
(This evening through Saturday) In the short term, Alabama remains in the northern upper flow regime, caught between a trough right along the east coast and a ridge that extends from the ArkLaTex up to the northern MS valley.
High pressure will attempt to build into the region, but a persistent northwesterly flow aloft will keep the pattern somewhat unsettled, particularly on Saturday.
Under mostly sunny skies temperatures have warmed from the mid 60s to the low to mid 70s, aiding in dissipating our fog. Troughing in the eastern CONUS will push off the Atlantic coast leaving us solidly in northerly flow by the end of the day.
218 PM CDT Fri Sep 12 2025 Tonight and Saturday: Warmer than normal temperatures and dry weather will continue through Saturday. Our CWA will become beneath a large 592dam ridge that is part of the omega block centered over the CONUS. Surface analysis had a 1018mb ridge oriented northeast to southwest across our CWA. This ridge will change very little through Saturday. The combined ridging surface and aloft will help maintain the warmer than normal temperatures across our region with highs Saturday topping out in the low to mid 90s again. Lows Saturday morning will range from the mid 60s northeast to the lower 70s southwest. At the surface, high pressure centered over the eastern U. will help reinforce dry flow into the southeast region into the lower levels.
(Through tonight) High pressure remains in control across the region today. (Saturday through Friday) Saturday will be similar to Friday, with highs in the low to mid 90s, and heat indices of 95-100 F in the afternoon.
Area temperatures range between the lower 50s to near 60 at this hour. Weak high pressure builds over the interior with dry conditions through early Saturday.
131 PM EDT Fri Sep 12 2025 High pressure remains in place over the next several days, bringing mostly sunny skies and mild temperatures.
Warmer than normal temperatures and dry weather is expected again today. Ridging aloft to our west will combine with surface ridging across our CWA from the northeast to allow afternoon highs in the low to mid 90s. /22/ The upper-level weather pattern across the CONUS for the next several days will primarily feature an ridge overspreading our forecast area from the west. At the surface, high pressure centered over the eastern U. will reinforce dry flow into our region in the lower levels. Collectively, the dry and subsident pattern will result in temps pushing the mid to upper 90s - about 5-10 degrees warmer than normal for mid September.
KEY MESSAGES: - Warm and dry conditions - River valley fog possible late Friday night --------------------------------------------------------------- High pressure remains in place over the region continuing calm, quiet and dry conditions. Clouds begin to increase Saturday afternoon as a weak short wave trough dives through the Great Lakes.
959 AM PDT Fri Sep 12 2025 * Low pressure brings breezy afternoon winds, much below average temperatures, and isolated precipitation to some areas through tomorrow.
230 PM CDT Fri Sep 12 2025 - Warmer on Friday and Saturday, with highs mainly in the upper 80s to lower 90s.
Boundary remains across south Florida with high pressure over the eastern U.
337 PM EDT Fri Sep 12 2025 High pressure will be in control through Saturday.
132 PM EDT Fri Sep 12 2025 High pressure will be in control through Saturday.
High pressure in place will keep conditions dry and once the daytime Cu fades with sunset, skies will be mostly clear overnight.
246 PM EDT Fri Sep 12 2025 High pressure will move east of the region through Saturday.
1144 AM CDT Fri Sep 12 2025 - Warmer on Friday and Saturday, with highs mainly in the upper 80s to lower 90s.
- A cold front will impact the area Saturday, bringing cooler temperatures through the weekend. The upper level low is slowly pushing into the Northern Intermountain west. After 6pm or 00z our thunderstorm potential will transition to shower potential creating the second phase or wave as a cold front pushes through. For Saturday, some lee cyclogenesis is created from the upper level trough pushing through on friday.