Aikyam-Lab/Synoptic-Bench huggingface dataset:
645 PM CDT Wed Oct 26 2022 (This evening through Thursday) The cold front that passed the region yesterday is found from the SE Atlantic coast into the eastern Great Lakes. Behind this front high pressure stretches from south central Canada to northeast Mexico this afternoon with a cool and dry Canadian air mass filling the central sections of the U. Tonight into Thursday the ridge across the central sections of the country will continue east, but not before giving our area another clear and cool night. The ridge will move east of the Mississippi Valley tomorrow which will begin the return flow locally by afternoon.
The sheltered valleys will certainly be several degrees cooler and could reach the 30s again.
659 PM EDT Wed Oct 26 2022 Notably colder tonight with lows near freezing and decreasing clouds.
925 PM EDT Wed Oct 26 2022 High pressure and dry conditions will continue across the CWA overnight. Despite the drier air, most of which remains aloft, cooler air rushing in from the NW is keeping boundary layer RHs low enough for some low-level clouds in NW portions of the forecast area which have slowly eroded away through the morning and afternoon as dry air mixes downward from aloft. As it does so, we'll stay locked in a steady weather pattern with gradual increases towards near-normal temperatures occurring as high temperatures tomorrow rebound into the low 70s.
Troughing that will dig across the northeastern portions of AZ this evening into tomorrow will turn zonal flow into more north to northwest flow aloft into tomorrow. This feature will cause gusty northerly winds to develop across higher terrain from west to east as a dry cold front advances eastward as we progress through the day Thursday.
722 PM EDT Wed Oct 26 2022 A passing cold front will bring a few showers to the region into early this evening. From later tonight into the upcoming weekend, a large area of high pressure will build in to result in dry weather.
Adjust cloud cover for tonight based on the eastward progression of the low clouds, which will linger most of the night on the Plateau. Clear skies will persist through tomorrow night, with afternoon temperatures a few degrees warmer tomorrow than what they were today.
935 PM EDT Wed Oct 26 2022 Overnight into the upcoming weekend, a large area of high pressure will build in to result in dry weather.
High pressure stretches from along the eastern Nebraska and western Iowa boarder southward into eastern Texas and western Louisiana. Quiet weather is on tap across the area over the next 24 hours as high pressure moves eastward across the area. High clouds are forecast to overspread the area this evening and continue into Thursday as a disturbance associated trough moves into Minnesota. Also on Thursday, departing high pressure to our east and a developing storm system in the Plains will result in an tightening pressure gradient across the Iowa.
/EC/ Tonight and tomorrow: A brief period of quasi-zonal flow aloft will quickly transition to southwesterlies ahead of a closed upper low diving through the Four Corners and towards the Southern Plains. Temperatures will quickly fall after sunset as the boundary layer decouples with overnight lows bottoming out in the low 40s across much of the area. Temperatures will quickly rebound after sunrise tomorrow with afternoon highs topping out in the low to mid 70s as warm advection begins to return ahead of the upstream wave.
No change from previous forecast reasoning as weakening cold front with line of showers and an embedded storm or two continues across the Nature Coast and offshore waters before eventually stalling and dissipating across WCFL/SWFL. The showers associated with the cold front have finally begun to move onshore along the nature coast.
Breezy winds are being observed through the Valley today as a trough deepens to our east, tightening surface pressure gradients.
641 PM CDT Wed Oct 26 2022 Tonight and tomorrow: A brief period of quasi-zonal flow aloft will quickly transition to southwesterlies ahead of a closed upper low diving through the Four Corners and towards the Southern Plains. Temperatures will quickly fall after sunset as the boundary layer decouples with overnight lows bottoming out in the low 40s across much of the area. Temperatures will quickly rebound after sunrise tomorrow with afternoon highs topping out in the low to mid 70s as warm advection begins to return ahead of the upstream wave.
923 PM EDT Wed Oct 26 2022 High pressure is over WI/IL. Air feeding into northern MI is trending drier as the high approaches. Becoming Dry and Cooler. Do not expect the lake effect to be long lived as high pressure builds into the area, resulting in inversion heights continuing to fall below 3500 feet and low-level flow trending westerly. High pressure will continue to build overhead Thursday and begin to slowly move eastward. This high pressure will dominate northern Michigan's weather through the end of this forecast period and beyond providing some decent fall weather and giving northern Michiganders more time to do any outside work before winter weather decides to move in.
722 PM EDT Wed Oct 26 2022 Cooler/drier tonight as a cold front exited east. High pressure and drier weather builds in by Thursday. Low pressure system ejects northeast of the Great Lakes this evening, pushing a cold front far east. Highs for Thursday will generally reach the 61 degree mark across the lowlands, ranging into the lower 50s highest elevations of our northeast mountains. While an upper level trough aims for Texas, southwesterly flow will become more influential over the Tennessee Valley and into the Central Appalachians.
1220 AM EDT Thu Oct 27 2022 Notably colder tonight with lows near freezing and decreasing clouds.
Early morning lows will be in the 30s for most of the Quad State, with localized values near freezing in the typically cooler spots. On the synoptic scale, upper-level flow will be increasingly southwesterly as a trough digs into the Four Corners region.
The upper-level pattern is flattening out as a trough axis lifts to the north over Canada. The attendant cold front has become increasingly stretched out and diffuse with the parent low moving away. Nevertheless, slow progress has been made against the upper- level ridging that has been dominant across the peninsula. As already mentioned, ridging is still dominant. While increasingly amplified upper-level flow is expected to redevelop towards the weekend, ridging remains dominant over West Central and SWFL. So while things remain on the warmer side, the forecast also remains generally quiet.
304 AM CDT Thu Oct 27 2022 A deep positively tilted synoptic scale trough will be diving into the Central High Plains region by this afternoon, while at the base a cold core cutoff low moves into New Mexico. At the surface, an inverted trough/weak surface cold front will be shifting across our local area from the west.
High pressure will gradually exit to the east over the next 24 to 36 hours and winds will become southeasterly. Temperatures will be a near carbon copy of yesterday, perhaps a few degrees warmer.
238 AM EDT Thu Oct 27 2022 Drier and slightly cooler air moves into the region through Friday. High pressure begins to move in from the west overnight.
128 AM EDT Thu Oct 27 2022 Overnight into the upcoming weekend, a large area of high pressure will build in to result in dry weather.
Skies remain mostly cloudy tonight as an upper trough pushes into the central US. Ensembles favor northern portions of the area to receive the highest rain totals.
238 AM MDT Thu Oct 27 2022 At 0830Z, a positively tilted upper trough extends from Manitoba, through the western Dakotas, and into the Central Rockies. At the surface, a weak trof is pushing eastward across the western SD plains.
407 AM EDT Thu Oct 27 2022 High pressure and drier weather builds in today. Upper level trough moves east while upper ridging takes its place overhead. Dry conditons persist into the next period as high pressure builds.
411 AM EDT Thu Oct 27 2022 A cooler and more seasonable airmass will build into the region today behind the passage of a cold front. High pressure will bring a period of dry weather which will last through the weekend. An incoming much cooler airmass will keep high temperatures today around 50F in most areas, with mid to upper 40s for the higher terrain. Temperatures will fall to near or below freezing for most areas, but a touch warmer near the lakes.
216 AM EDT Thu Oct 27 2022 High pressure and drier weather builds in today. Upper level trough moves east while upper ridging takes its place by overhead. While an upper level trough aims for Texas, southwesterly flow will become more influential over the Tennessee Valley and into the Central Appalachians. Afternoon highs rebound into the mid 60s by Friday for the lower elevations. Prevailing dry spell will come to an end for the latter half of the weekend as a low pressure system encroaches from the south.
Thermal trough axis shifts right overhead tomorrow morning, and given preceding cold advection and at least pockets of clearing overnight, lows settle into the mid 30s (in comparison to lows in the 50s the past few days). High pressure building in from the west keeps conditions dry Thursday, with limited available moisture (30- 40 percent RH in the 1000-500 MB layer) equating to a mostly sunny forecast. Deep layer isentropic ascent formulates a robust precipitation shield as the cyclone matures and stalls near the Gulf.
Friday, the stalled out front to the north will rapidly deteriorate, while high pressure over the eastern US strengthens and extends down over South Florida. However, some locations near the Atlantic and Gulf shores may see low temperatures in the low 70s.
Cooler and breezier conditions return for Thursday with an incoming disturbance clipping the Four Corners. High pressure builds back up into the region this weekend, resulting in slightly warmer and dry conditions once again. A weak cold front associated with a trough over Utah will sweep through the far northern portions of Arizona overnight. Along with the wind/rain impacts, cooler temperatures will be noted for most of the high country. High pressure will begin to build back up over the Southwest.
and Friday High pressure was situated over the western Great Lakes early this morning. Mixing through 900-875 mb should yield high temperatures in the lower to middle 50s. Sunshine, south winds and mixing through 900-875 mb will result in warmer temperatures, with highs mainly in the 55 to 60 range; slightly cooler near Lake Michigan.
On the large scale, upper level low across the central Rockies is expected to work south into New Mexico and west Texas by tonight. A couple of pieces of 500 mb vorticity break away from the main upper level low, spilling into central Kansas resulting in some high based shower activity. As the upper level low spins south and east into central Texas, upper level support across the area continues to weaken. Lighter winds are expected on Friday, and with the dry conditions, should see temperatures a degree or two warmer than today. Expected seasonal temperatures through the weekend, as upper level low across Texas lifts northeast into southeast Missouri. Thereafter, westerly flow develops drawing warmer air into the region.
1126 PM MDT Wed Oct 26 2022 At this hour WV imagery depicts trough over the northern Rockies with nearly zonal flow over the Northern Plains. As we head into the evening hours, the aforementioned trough progresses eastward and deepens, digging into Colorado and becoming a closed upper low over the Southern Plains. A stray snow shower or two in the higher elevations of the Black Hills can't be ruled out.
320 AM EDT Thu Oct 27 2022 High pressure and drier weather builds in today. Upper level trough moves east while upper ridging takes its place by overhead.
It shouldn't be dense and focused in the low lying regions. The upper level pattern has a deep upper level trough located over the four corners of the United States with high pressure through the mid and low levels over the Midwest.
This is brought on by a low pressure system pushing southeast across the Rockies toward Texas. Moisture being pulled northeast out of the east side of the low is what is bringing us these showers today. Although the aforementioned low will stall over Texas an upper level ridge will start to develop over the northern and central Plains as the low begins to get cut off from the main flow.
157 AM MDT Thu Oct 27 2022 Upper trough has dropped well south of the region toward the four corners area early this morning. Heights will build over the region today in the systems wake leading to slightly warmer temps in the lower to mid 50s. Other than early morning wind in the west, Friday should be a pleasant October day as weak ridge shifts over region and is replaced by stronger W/SW flow in mid levels.
Raised POPs to likely/categorical over the next several hours based on radar trends and what hi-res models are showing for reflectivity output, which generally paint the eastern CWA in the highest chances. For tonight, the rain-producing system will be out of here and we'll watch broad upper ridging build in through the day Friday.
Westerly flow aloft will take over today as one trough of low pressure moves east of the Northern Rockies and another trough strengthens over the Gulf of Alaska. Some leftover moisture from the departing low pressure system will still be able to fuel some light snow showers over northwest Montana this morning.
The influence of this high will keep weather conditions benign and rain free on Thursday and Friday. After starting the morning in the 40s across the forecast area, temperatures will increase into mainly the low to mid 70s this afternoon under mostly clear skies. On Friday, the high pressure center will continue to shift eastward towards New England.
Troughing that will dig across the northeastern portions of AZ this evening into tomorrow will turn zonal flow into more north to northwest flow aloft into tomorrow. This feature will cause gusty northerly winds to develop across higher terrain from west to east as a dry cold front advances eastward as we progress through the day Thursday. Temperatures will trend upward into the low 80s as ridging builds in across the area on Friday.
It should be mentioned that just outside of the cloud cover, ob sites have dipped into the low 30s to high 20s. Daytime highs should climb into the high 40s to low 50s across the region.
Mid to high level clouds were increasing early this morning ahead of a broad mid-level trough approaching from the plains. The bulk of the shower activity is expected to remain west and north of the area today where the moisture transport will be focused ahead of the approaching trough.
Tranquil weather is expected today, with diminishing cloud cover and highs in the 60s Discussion: An upper trough will dig aggressively from the four corners region this morning, into west Texas by tonight. Tonight, clear skies will continue and winds will be light so expect to see temperatures fall into the low 40s.
1226 AM EDT Thu Oct 27 2022 Overnight into the upcoming weekend, a large area of high pressure will build in to result in dry weather.
Dry and seasonably mild weather is expected through the end of the month, before a transition to a cooler and more active pattern is probable. Weak embedded ridging will warm temperatures for Friday, with forecast highs in the mid 50s to lower 60s.
Early this morning, zonal flow was transitioning to southwest flow ahead of an upper level low that is diving southeast over the Rockies.
1224 AM CDT Thu Oct 27 2022 (This evening through Friday) Zonal flow aloft will become swrly through the period ahead of an approaching H500 trough. At the sfc, high pressure will lift northeastward and srly winds will usher in moist air. By Friday, the H500 trough will have deepened into a cyclone and will be moving eastward across central TX.
A few upper level cirrus clouds will try to invade the FA by 27/21z as upper level moisture advection is reintroduced via the upper level trough axis situated over NM and W/TX.
08/DML (This evening through Thursday) The cold front that passed the region yesterday is found from the SE Atlantic coast into the eastern Great Lakes. Behind this front high pressure stretches from south central Canada to northeast Mexico this afternoon with a cool and dry Canadian air mass filling the central sections of the U. Tonight into Thursday the ridge across the central sections of the country will continue east, but not before giving our area another clear and cool night. The ridge will move east of the Mississippi Valley tomorrow which will begin the return flow locally by afternoon.
The showers associated with an upper trough have ended this evening. An upper ridge will build into the area through Thursday. An exiting upper trough and unstable air mass will support rain/snow showers and gusty winds to 40 mph through sunset. This will be the last system to impact the region in the short term as a flat upper ridge builds in on Thursday, transitioning to a more zonal flow on Friday.
Highs on Thursday will also be a few degrees below normal in the lower to middle 60s despite abundant sunshine. Lows Thursday night will be a couple of degrees warmer than tonight, then readings will rebound to near to a little above normal in the middle 60s to around 70 degrees on Friday. We will see clouds begin to increase from the southwest Friday afternoon with the approach of a low pressure system over Texas.
Surface analysis places the Florida Keys under a weak dome of high pressure, with a decaying cold front limping across the Gulf of Mexico, and a large, continental dome of high pressure slowly advecting in its wake towards the eastern third of the CONUS.
A potent jet streak will round the base of this trough. Return flow ramps up as lee troughing develops in response to this trough with rapid moisture return expected. Eventually, the quickly advancing Pacific Cold Front will meet this dryline and erupt into a line of thunderstorms. Behind the cold front, much cooler temperatures, gusty northerly winds, and perhaps a few elevated showers remain by Friday morning.
342 AM CDT Thu Oct 27 2022 Seasonably cool and dry conditions will continue for the next few days as high pressure to the northeast continues to be the dominant influence on central Illinois weather.
229 AM CDT Thu Oct 27 2022 While we remain under the influence of high pressure following this week's low, we see another trough digging out west today. Flow aloft will become increasingly southwesterly with time today, but at the surface the high moving into the Great Lakes will maintain its influence across our region with a low level easterly flow. The western trough digs further south and east than the last one, cutting off fully over the Red River between Texas and Oklahoma on Friday. The rain associated with it will stay to the southwest near the upper low, and in fact our area will likely see a bit more sunshine with highs more solidly in the 60s.
Water vapor imagery shows a digging upper level low near the Great Basin with west/southwest flow aloft prevailing through the nations midsection. Where the clouds are more prevalent and opaque, temperatures were being held up into the lower 40s (mainly far west/southwest) and where skies were mainly clear temperatures were in the 30s. Key Message: Tranquil Discussion: The large expanse of high pressure covering the Midwest will gradually shift eastward over the next 24 hrs, but remain the dominant feature in our weather.
1047 PM MDT Wed Oct 26 2022 Upper low will move down the western side of the Rockies tonight through Thursday, eventually reaching southwest Texas by Friday morning. The associated surface cold front will stall out in the Kansas and Colorado border area on Thursday morning, with some gusty north winds through Thursday afternoon on the cold side of the front. Skies clear Thursday night with lows ranging from the low to mid 20s in northeast Colorado to the upper 30s in north central Kansas.
The low clouds will hold on into the aftn over the west.
It shouldn't be dense and focused in the low lying regions. -- Dry weather through Friday -- The upper level pattern has a deep upper level trough located over the four corners of the United States with high pressure through the mid and low levels over the Midwest.
612 AM CDT Thu Oct 27 2022 Quiescent weather remains in place through the end of the work week, largely thanks to high pressure of 1025 mb sprawled over the area this morning. A digging strong upper level low across the Four Corners region and a couple of lead short waves over the Plains will fling some cirrus over the area today. As the aforementioned upper low digs into west Texas by late tonight, the downstream response will be upper ridging building into the area from the southeast under a split jet stream flow regime.
539 AM CDT Thu Oct 27 2022 Seasonably cool and dry conditions will continue for the next few days as high pressure to the northeast continues to be the dominant influence on central Illinois weather.
611 AM CDT Thu Oct 27 2022 While we remain under the influence of high pressure following this week's low, we see another trough digging out west today. Flow aloft will become increasingly southwesterly with time today, but at the surface the high moving into the Great Lakes will maintain its influence across our region with a low level easterly flow. The western trough digs further south and east than the last one, cutting off fully over the Red River between Texas and Oklahoma on Friday. The rain associated with it will stay to the southwest near the upper low, and in fact our area will likely see a bit more sunshine with highs more solidly in the 60s.
432 AM MDT Thu Oct 27 2022 At 0830Z, a positively tilted upper trough extends from Manitoba, through the western Dakotas, and into the Central Rockies. At the surface, a weak trof is pushing eastward across the western SD plains.
1000 AM CDT Thu Oct 27 2022 Seasonably cool and dry conditions will continue for the next few days as high pressure to the northeast continues to be the dominant influence on central Illinois weather.
Colorado this morning is reporting some snow reported in the higher elevations. Around the rest of the nation it looks quiet and mild weather for the most part as high pressure remains in control from the Great Lakes region down into the Gulf Coast. But changes are on the way as an upper lvl trof drops down through the central rockies moving into the Midland area of west Texas tomorrow after sunrise.
743 AM EDT Thu Oct 27 2022 A cooler and more seasonable airmass will build into the region today behind the passage of a cold front. High pressure will bring a period of dry weather which will last through the weekend. An incoming much cooler airmass will keep high temperatures today around 50F in most areas, with mid to upper 40s for the higher terrain. Temperatures will fall to near or below freezing for most areas, but a touch warmer near the lakes.
645 AM EDT Thu Oct 27 2022 A cooler and more seasonable airmass will build into the region today behind the passage of a cold front. High pressure will bring a period of dry weather which will last through the weekend. An incoming much cooler airmass will keep high temperatures today around 50F in most areas, with mid to upper 40s for the higher terrain. Temperatures will fall to near or below freezing for most areas, but a touch warmer near the lakes.
954 AM EDT Thu Oct 27 2022 A clearing trend is expected today under building high pressure.
A deep positively tilted synoptic scale trough will be diving into the Central High Plains region by this afternoon, while at the base a cold core cutoff low moves into New Mexico. At the surface, an inverted trough/weak surface cold front will be shifting across our local area from the west.
659 AM EDT Thu Oct 27 2022 High pressure and drier weather builds in today. Upper level trough moves east while upper ridging takes its place overhead. Dry conditons persist into the next period as high pressure builds.