Aikyam-Lab/Synoptic-Bench huggingface dataset:
The upper level pattern features troughing that extends from the Great Lakes southward into the Southeastern U. At the surface, high pressure is centered across the southern Appalachians. A cold front will dive southeastward today across the Great Plains. This front will be associated with an upper trough that will move into the Tennessee Valley over the weekend. High clouds will increase tonight as a trough from the northwest approaches. These high clouds will prevent ideal radiational cooling conditions overnight and overnight lows will be a bit warmer than tonight. Lows will generally be in the low 50s.
(Today and tonight) The low-level thermal ridge across the west will expand slightly to the east today with 850 mb temperatures progged to be range from ~16 to 23 deg C. The cold front is rather weak with no appreciable temperature change. The low relative humidity, modest winds, and above average temperatures will result in elevated fire weather conditions this afternoon.
The trough and its attendant cold front will swing quickly south and east through the day.
848 PM PDT Thu Sep 23 2021 An area of low pressure will lead to cooler weather and a chance for showers and thunderstorms across the region through the weekend. As this area of low pressure moves eastward, another low pressure trough will approach the west coast. This will lead to continued cooler weather with night and morning low clouds for areas west of the mountains. Near the coast, temps were only a few degrees lower while some inland locations were as much as 15-20 degrees cooler than yesterday. This was courtesy of the trough extending from the Great Basin into So Cal. Northerly flow on the upstream side of the trough also brought smoke aloft into SoCal from the large fires to our north.
locally dense near the warmer waterways. Tonight another clear and cooler than average night with slightly warmer lows on the plateau and across the southern valley area.
445 AM EDT Fri Sep 24 2021 A cold front was located over central Florida north of the Tampa Bay region, with a weak pre-frontal trough hard to discern given various land breeze components to the wind across south Florida. Shallow convection was most-concentrated over Gulf waters north of the lower and middle Keys, although late last evening isolated showers formed along a long drifting boundary apparently released by deep afternoon convection over Cuba yesterday. This will keep the subtropical ridge split between a cell near Hispaniola and another over the Lower Rio Grande. Lower tropospheric ridging appears to remain flat and weak, with surface flow favoring easterly components before the southern Florida peninsular seabreeze circulations develop.
Primary uncertainty is the wind direction at DHT and GUY as a weak cold front arrives from the north and potentially stalls over both of these sites this afternoon. H500 ridge building over the Panhandles will continue with large scale subsidence over the region with dry conditions into tomorrow. Perhaps a bit cooler in the northern Panhandles if the weak cold front can make its way further south into the Panhandles by tomorrow afternoon. Low tomorrow night, especially for areas behind cold front in the northern Panhandles may drop into the upper 40s with mid 50s out ahead of the front.
232 AM CDT Fri Sep 24 2021 Overall things will be quiet as upper ridging dominates the region. Winds may become more on the breezy side during the afternoon and early evening as a cold front approaches the northern Texas Panhandle.
/22/ High pressure at the surface will center itself over the region tonight. Tomorrow, we will remain under a weakening trough, which will keep conditions sunny and dry. Dry air will remain persistent through the weekend into the beginning of the week as a ridge builds over the region in response to a low stretching across NM/AZ.
251 AM MDT Fri Sep 24 2021 Currently, light scattered showers associated with an approaching cold front are moving over the northern portions of the CWA. SCT to BKN clouds associated with this front and the larger trough positioned farther to the north will remain over portions of east-central Wyoming and the Nebraska Panhandle through this morning. Otherwise, mostly sunny conditions are expected with cooler temps again for Friday. However, a warm up is expected headed into the weekend as broad upper level ridging takes over the western CONUS.
916 PM MDT Thu Sep 23 2021 Scattered light showers continue in the mountains this evening with weak upper low over Utah and some marginal moisture streaming into Colorado from the southwest. Some of the high valleys may still fall below freezing. Highs in the plains will stay in the 70's, with 60's for most of the high country. Temperatures will climb back towards 90 over the weekend as a ridge of high pressure builds over the West.
1131 PM MDT Thu Sep 23 2021 A mid-level trough deepening over the Great Basin today is pushing thickening high clouds through eastern Utah and northwest Colorado. These clouds will continue to translate eastward through the forecast area late today as the trough deepens and its axis shifts eastward over central Utah later today. The trough splits tonight with a closed low forming over Utah drifting southward over Arizona later tonight.
646 AM CDT Fri Sep 24 2021 High pressure centered over the Lower Mississippi Valley will continue to drift east today, meanwhile an upper level short wave will dive southeast from the Dakotas into the Mississippi Valley, pushing a surface cold front into northeast Missouri and west central Illinois by early this evening. There will certainly be strong forcing provided by the upper level trough and low level frontogenesis, however low level moisture and instability will be limited. Carney Weak high pressure will build across Missouri and western Illinois behind the front on Saturday. This will bring cooler air (briefly) to the Mid Mississippi Valley, and highs are only expected to rebound into the mid and upper 70s.
1021 AM EDT Fri Sep 24 2021 Water vapor imagery highlights a broad long wave trough across the Southeastern US. Meanwhile, a diffuse cold front is draped across Central Florida.
While thunderstorms are possible this afternoon/evening, activity should remain focused across the higher terrain west of area terminals. Heading into Saturday, the aforementioned trough is progged to develop into a broad cutoff low near the AZ/CA border, briefly retrograding southwest of Baja.
Low level east flow is bringing the dry conditions to the area, and the Coast Range ridges are seeing poor recoveries. The strong ridging aloft that is bringing the dry conditions to the area will break down Friday and the flow aloft will become southwesterly. It will force the thermal trough to move inland, thus turning the low level flow back onshore. This will support much cooler conditions along the south coast, but the thermal trough will make for a hot day inland with highs 10 to 20 degrees above normal. Southwest flow aloft will continue to increase through the weekend as as long wave trough approaches the coast.
the upper level flow pattern features an upper trough over the Central Plains, with an developing upper low over the Desert Southwest. Temperatures are much warmer this morning, with 50s to lower 60s across the Plains, and 40s to 50s over the San Luis Valley. the upper trough over the Central Plains will continue to shift eastward into the Great Lakes, while the upper low over the Desert Southwest continues southwest into southern California. Upper level ridging will build from the Great Basin, east into Colorado by tonight. Temperatures this afternoon will be slightly cooler than yesterday, with lower to mid 80s across the Plains, and 70s over the San Luis Valley.
/issued 232 AM CDT Fri Sep 24 2021/ Overall things will be quiet as upper ridging dominates the region. Winds may become more on the breezy side during the afternoon and early evening as a cold front approaches the northern Texas Panhandle. A cutoff upper level low pressure system located off the northern coast of Baja California early Saturday will slowly approach through the weekend, nudged northeast by a deep upper low over the eastern Gulf of Alaska.
Isolated to scattered showers and a few thunderstorms will remain in the forecast the next several days as a low pressure system impacts the region.
/22/ Today and Tonight: Continued dry through the period with slightly warmer temperatures. This high will shift east today and tonight resulting in a light east wind today and east southeast tonight.
532 AM MDT Fri Sep 24 2021 Currently, light scattered showers associated with an approaching cold front are moving over the northern portions of the CWA. SCT to BKN clouds associated with this front and the larger trough positioned farther to the north will remain over portions of east-central Wyoming and the Nebraska Panhandle through this morning. Otherwise, mostly sunny conditions are expected with cooler temps again for Friday. However, a warm up is expected headed into the weekend as broad upper level ridging takes over the western CONUS. Areas farther east of the Laramie Range may struggle to produce stronger winds due to the lee side trough, but most locations across the CWA will see RHs in the teens Saturday.
Some drier and slightly cooler air has filter into most of the area. Temperatures and dew points will be noticeably cooler and drier over the Nature Coast, but any difference will be minimal from around the Interstate 4 corridor south.
Another quiet and nice day is in store for South Texas today as weak mid-level ridging remains over the region. At the surface, the high pressure will be shifting eastward into the northern Gulf allowing for a gradual increase in moisture as the flow becomes more easterly to southeasterly across the area. Daytime temperatures today will be very similar to yesterday's, with highs ranging from the mid 80s to the lower 90s. Tonight and Saturday, temperatures will run about 3-5 degrees warmer at some inland locations, with lows generally in the 60s and highs in the upper 80s to low 90s.
The upper level pattern features troughing that extends from the Great Lakes southward into the Southeastern U. At the surface, high pressure is centered across the southern Appalachians. A cold front will dive southeastward today across the Great Plains. This front will be associated with an upper trough that will move into the Tennessee Valley over the weekend. High clouds will increase tonight as a trough from the northwest approaches. These high clouds will prevent ideal radiational cooling conditions overnight and overnight lows will be a bit warmer than tonight. Lows will generally be in the low 50s. These high clouds will decrease in coverage early Saturday morning as the trough progresses rather quickly to the east. Height rises will occur as the trough exits to the east and a ridge tries to build into the region from the southwest.
Previous Discussion: Clouds will diminish throughout the morning under dry advection and increasing subsidence as high pressure builds to our south and a low pressure system exits north into Quebec. Showers are expected to return to the Ohio River Valley as the trough, and its associated weak cold front, tracks east Saturday afternoon. Showers should wrap up late Saturday as the cold front exits into central PA.
High pressure remains over the area today with weak offshore flow.
High pressure today with a dry cold front moving through late tonight into Saturday.
Tonight and Saturday, the upper flow will back to the west as flat ridging occurs over the northern Rockies. Dry and warmer temperatures will occur Saturday. Both the GFS and EC pick up a closed area of low pressure off the coast of Baja California.
915 AM EDT Fri Sep 24 2021 High pressure will build from the TN valley to the mid-Atlantic states through Saturday.
318 AM PDT Fri Sep 24 2021 Expect warmer temperatures with a return of west winds into the weekend.
700 AM EDT Fri Sep 24 2021 High pressure will build from the TN valley to the mid-Atlantic states through Saturday.
637 AM CDT Fri Sep 24 2021 An upper trough is bringing some light showers to the region this morning. Breezy northwest winds are still expected to develop this afternoon before the center of the high settles in around 0z. Northwest flow aloft and diminishing winds overnight as the upper trough exits are expected to produce good conditions for radiational cooling as skies clear. Temperatures will rebound quickly on Saturday as the upper ridge shifts a bit farther east and heights rise.
High pressure continues to build across the Great Basin, bringing warming temperatures and quiet weather into the upcoming weekend. Model solutions are showing slight ridging over the Great Basin. High temperatures will be in the 70s and 80s while overnight low temperatures will be in the 30s and 40s, with some of the cooler locales perhaps dipping into the 20s.
Low temperatures Friday night in the low to mid 50s are expected.
H500 trough extending south beneath its parent Low north of the US/CA border will transition from the Northern Plains today and across the Great Lakes saturday. Sfc ridging will shift to the southeast and mid level ridging, SW of the area, will build northeast toward the state.
Temperatures and dew points will be noticeably cooler and drier over the Nature Coast, but any difference will be minimal from around the Interstate 4 corridor south.
714 AM EDT Fri Sep 24 2021 A dry and pleasant fall weekend is in store, with high pressure giving plenty of sunshine.
Thereafter, we return to a prolonged dry stretch as high pressure reasserts control. With northwest winds on Saturday, temperatures should be slightly cooler than today across most of the area.
922 AM CDT Fri Sep 24 2021 Great weather again today, with high pressure over the area and dry conditions keeping dew points around 50 degrees. High clouds will increase tonight as a trough from the northwest approaches. These high clouds will prevent ideal radiational cooling conditions overnight and overnight lows will be a bit warmer than tonight. Lows will generally be in the low 50s. These high clouds will decrease in coverage early Saturday morning as the trough progresses rather quickly to the east. Height rises will occur as the trough exits to the east and a ridge tries to build into the region from the southwest.
403 AM CDT Fri Sep 24 2021 Today and Tonight: Continued dry through the period with slightly warmer temperatures. This high will shift east today and tonight resulting in a light east wind today and east southeast tonight.
1003 AM EDT Fri Sep 24 2021 A dry and pleasant fall weekend is in store, with high pressure giving plenty of sunshine.
Placid weather continues for the next two days as an upper low meanders to our southwest, large scale cyclonic flow aloft over the Great Lakes to our northeast, and subtle upper ridging in place over the Panhandles. Today, modest increase in temperatures aloft and continued southwesterly winds at the surface should lead to slightly warmer highs than yesterday, with conditions warming into the upper 80s. Exception looks to be the northwestern Panhandles where a weak cold front, currently located in CO/KS, looks to sneak into the area before stalling. Saturday, aforementioned front washes out as lee troughing resumes in E CO. Presence of the ridge aloft again precludes any mention of precipitation.
425 AM CDT Fri Sep 24 2021 An upper trough is bringing some light showers to the region this morning. Breezy northwest winds are still expected to develop this afternoon before the center of the high settles in around 0z. Northwest flow aloft and diminishing winds overnight as the upper trough exits are expected to produce good conditions for radiational cooling as skies clear. Temperatures will rebound quickly on Saturday as the upper ridge shifts a bit farther east and heights rise.
625 AM CDT Fri Sep 24 2021 Temperatures were a bit warmer than 24 hours ago, with readings ranging from the upper 40s in the eastern Ozarks to the upper 50s in southwest portions of Missouri. Temperatures will also rise into the low to mid 80s across the area. Temperatures tonight will be a bit warmer with some cloud cover with lows in the low to mid 50s.
Increasing Altocu and Stratocu clouds late in the day and Sat night will lead to SHRA likely arriving late in the day (after 21Z in Warren Co) as a cold front and limited moisture races across the area (in Clipper-like fashion) Sat night.
Showers are expected to return to the Ohio River Valley as the trough, and its associated weak cold front, tracks east Saturday afternoon. Showers should wrap up late Saturday as the cold front exits into central PA.
Great weather again today, with high pressure over the area and dry conditions keeping dew points around 50 degrees. High clouds will increase tonight as a trough from the northwest approaches. These high clouds will prevent ideal radiational cooling conditions overnight and overnight lows will be a bit warmer than tonight. Lows will generally be in the low 50s. These high clouds will decrease in coverage early Saturday morning as the trough progresses rather quickly to the east. Height rises will occur as the trough exits to the east and a ridge tries to build into the region from the southwest.
256 PM EDT Fri Sep 24 2021 Current radar mosaic and satellite imagery across central Indiana are quiet with high pressure in place. Meanwhile, temperatures have already climbed into the low to mid 70s, and western counties will likely top off in the upper 70s later today with the southwest surface flow and ample sunshine. The pattern will, however, shift early tonight as an upper trough and associated cold front overspread central Indiana. Forecast soundings continue to show rapid saturation in the lower levels after Sat 06Z with the best forcing moving across the state in the Sat 06-12Z time frame. But, the remainder of central Indiana will top off in the low to mid 70s. Strong subsidence in the wake of the trough/front will result in rapid clearing and a return to the radiational cooling on Saturday night.
An upper trough is bringing some light showers to the region this morning. Breezy northwest winds are still expected to develop this afternoon before the center of the high settles in around 0z. Northwest flow aloft and diminishing winds overnight as the upper trough exits are expected to produce good conditions for radiational cooling as skies clear. Temperatures will rebound quickly on Saturday as the upper ridge shifts a bit farther east and heights rise.
1229 PM CDT Fri Sep 24 2021 Temperatures were a bit warmer than 24 hours ago, with readings ranging from the upper 40s in the eastern Ozarks to the upper 50s in southwest portions of Missouri. Temperatures will also rise into the low to mid 80s across the area. Temperatures tonight will be a bit warmer with some cloud cover with lows in the low to mid 50s.
243 PM MDT Fri Sep 24 2021 Upper level ridge begins to slowly rebuild across the area later tonight and through the day Sat as cut-off low over the swrn U.
Some passing cloudiness as day progresses on Saturday noted due to passage from the northwest of a weak surface cold front and upper level trough. As mid portion of next work week progresses, deep upper level troughing will develop across locations approaching Atlantic Seaboard. Latest ECMWF solution retrogrades an upper level low from New England Region southwestward into central South Carolina by around sunrise on Saturday morning. So to sum it up, generally mostly clear skies should prevail through next Friday afternoon as quasi surface ridging influences and a dry northwesterly flow pattern aloft prevail.
255 PM EDT Fri Sep 24 2021 Cool and dry high pressure will persist over the region through tonight. A weak cold front will cross the area from the northwest late Saturday, but with limited moisture.
247 PM MDT Fri Sep 24 2021 The 24/12Z H500 hand analysis chart showed merging low pressure systems over Upper Great Lakes region and upstream. high pressure dominating most of the Pacific Coast. creating a broad Rex pattern as high pressure is forced into the Intermountain West by the far upstream low digging into the E.
18Z 24SEPT2021 TAFs High pressure over the area will keep all TAF sites VFR well past the end of this cycle.
Upper low northeast of Lake Superior with sharp ridging across the Upper Midwest. Sharp trough over the Plains of Canada and the U. At the surface, cold front extends from Western Lake Superior across Wisconsin and into Iowa. Cold front moves through the area overnight, clearing the Lake Huron shoreline by around 12z. Possibly some waterspouts? Behind yet another cold front that will sweep through the forecast area late Friday night with colder air filtering in on westerly winds as well as wrap around moisture.
344 PM EDT Fri Sep 24 2021 A period of rain showers is expected later this evening into the overnight as another cold front tracks across the area. Cooler weather will settle in for Saturday with high temperatures from the mid 60s to low 70s. An upper level trough continues to strengthen today as a strong upper level jet streak (120+ knots) sampled by Glasgow, MT morning RAOB continues to dig through the base of this trough. Deep layer subsidence will build in Saturday with mainly sunny skies and cooler highs from28 the mid 60s northeast to low 70s far southwest.
Excellent weather conditions continue through the near term as high pressure settles into the region. A few clouds could move in towards daybreak and any locations that see cloudiness could end up a few degrees warmer than predicted.
117 PM EDT Fri Sep 24 2021 A dry and pleasant fall weekend is in store, with high pressure giving plenty of sunshine.
1113 AM MDT Fri Sep 24 2021 Currently, light scattered showers associated with an approaching cold front are moving over the northern portions of the CWA. SCT to BKN clouds associated with this front and the larger trough positioned farther to the north will remain over portions of east-central Wyoming and the Nebraska Panhandle through this morning. Otherwise, mostly sunny conditions are expected with cooler temps again for Friday. However, a warm up is expected headed into the weekend as broad upper level ridging takes over the western CONUS. Areas farther east of the Laramie Range may struggle to produce stronger winds due to the lee side trough, but most locations across the CWA will see RHs in the teens Saturday.
With this dry air mass in place and cool high pressure building south some of the coldest morning lows in a few months are expected. This ridge of high pressure shifts southeast on Saturday and will allow for a westerly winds to develop.
Heading into Saturday, the aforementioned trough is progged to develop into a broad cutoff low near the AZ/CA border, briefly retrograding southwest of Baja.
Over the higher elevations to the west and east of the valleys, temps may stay a bit milder given some light gradient winds. The model blend might not be catching on to the warming as quick as it should, and therefore favor some warmer MOS mixed into the temps for highs Saturday afternoon, especially out west where H850 temps warm up quite a bit over today. Mixing depths are also fairly deep Saturday afternoon, another plus for warmer than model blend temps. It's looking rather likely now that 850 mb temps will soar into the +20s C across the region as upper level ridging slides east across the northern plains.
Dry and clear skies over the region today as the upper ridge axis moves in from the coast. High temperatures this afternoon will run several degrees warmer than yesterday and slightly above normal.
331 PM CDT Fri Sep 24 2021 (Issued 330 PM CDT Fri Sep 24 2021) Tonight through Saturday night: The cold front has pushed through much of MN and is entering W/SW WI this afternoon. Good forcing with the cold front and slight steepening of the lapse rates aloft will support some limited chances for thunderstorms this afternoon and evening. Cooler and drier air quickly arrives behind the front with lows tonight falling into the 40s.