Aikyam-Lab/Synoptic-Bench huggingface dataset:
433 PM MDT Tue Jul 20 2021 Low pressure system and cold front is moving east through eastern Montana this afternoon. Skies clear late tonight and upper ridge builds back into the area during the day on Wednesday. Ridge moves to the east Wednesday Night and a wave in SW flow aloft could bring a chance of thunderstorms to the western half of the region.
914 PM EDT Tue Jul 20 2021 Warmer and more humid conditions are expected today south of a cold front dropping southward from the eastern Great Lakes. A cold front will sweep through central Pennsylvania on Wednesday, ushering in cooler temperatures and refreshingly low humidity for the rest of the work week before rain chances, heat and humidity make a comeback for the weekend. Heights will be on the rise across the NW half of the area on Wed as cooler, drier air is advected in from the NW. Showers and storms will again be possible in eastern zones through Wed afternoon as the upper trough axis and sfc cold front swing through in the presence of 1500 J/kg MLCAPE and DCAPE of 800-900 J/kg.
Cooler and more comfortable weather will follow for much of the rest of the work week. Cold front continuing to slip south of the area early this morning, but upper trough lagging behind. Overcast along with a few showers this morning as the trough pushes through, then dry weather this afternoon under gradually clearing skies. Mainly clear and cool tonight with high pressure drifting into the region.
Temperatures west of the James may be a couple/few degrees warmer with 850 mb tempers sneaking up a tad.
1120 PM EDT Tue Jul 20 2021 Warmer and more humid conditions are expected today south of a cold front dropping southward from the eastern Great Lakes. A cold front will sweep through central Pennsylvania on Wednesday, ushering in cooler temperatures and refreshingly low humidity for the rest of the work week before rain chances, heat and humidity make a comeback for the weekend. Heights will be on the rise across the NW half of the area on Wed as cooler, drier air is advected in from the NW. Showers and storms will again be possible in eastern zones through Wed afternoon as the upper trough axis and sfc cold front swing through in the presence of 1500 J/kg MLCAPE and DCAPE of 800-900 J/kg.
1128 PM EDT Tue Jul 20 2021 Warmer and more humid conditions are expected today south of a cold front dropping southward from the eastern Great Lakes. A cold front will sweep through central Pennsylvania on Wednesday, ushering in cooler temperatures and refreshingly low humidity for the rest of the work week before rain chances, heat and humidity make a comeback for the weekend. Heights will be on the rise across the NW half of the area on Wed as cooler, drier air is advected in from the NW. Showers and storms will again be possible in eastern zones through Wed afternoon as the upper trough axis and sfc cold front swing through in the presence of 1500 J/kg MLCAPE and DCAPE of 800-900 J/kg.
Cooler and more comfortable weather will follow for much of the rest of the work week. A cold front will continue to drop southward overnight. Cooler and less humid conditions will take hold Wednesday. Low temperatures largely in the 50s, but 40s possible across cooler portions of Souther Tier.
Latest surface analysis shows high pressure centered over SW IA with the OH Valley situated between two boundaries, one across the southern Great Lakes and the other across the southern Gulf States.
1128 PM CDT Tue Jul 20 2021 Mid-upper trof axis and weak llvl convergent zone across southern parts of the area will provide chances for iso/sct precip overnight.
228 AM CDT Wed Jul 21 2021 Upper low that has brought us showers and storms will slowly creep westward towards the southern Plains today, which will help give most of the mid state a break from afternoon storm chances. Areas in the far south near the AL border will see some isolated afternoon storm chances as the upper low will still have a bit of influence for that area, but the rest of the region should remain dry. But, as the upper low slides west, northwest flow aloft will move aloft in its place, and bring some smoke over the region. Fires out in the western US are the source of most of the smoke, and it will continue to travel through the upper ridge over the northern Plains down through the Midwest and over the mid state.
305 AM EDT Wed Jul 21 2021 Isolated showers should end today as a cold front crosses and exits the region.
256 AM CDT Wed Jul 21 2021 The mid/upper ridge over the Central Great Basin area will gradually shift eastward over the Central Rockies today.
High pressure stretching across the state and into the Gulf of Mexico will bring PWAT values "down" (1.
Highs are expected to be 3-5 degrees warmer than yesterday as stronger south winds return to the area.
This low will continue to overspread low-level moisture across the area, allowing for development of the standard summer time showers during the afternoon period. 0"+ range, decreasing across N GA thanks in part to the aforementioned high pressure.
253 AM EDT Wed Jul 21 2021 Surface analysis early this morning shows strong high pressure in place over Lake Superior. Aloft water vapor continued to show strong ridging in place over the Rockies. however some high ridge riding moisture was flowing toward Indiana from the northern Plains.
1112 PM EDT Tue Jul 20 2021 A crossing cold front will bring the risk for showers and thunderstorms overnight and into Wednesday morning.
A quiet weather pattern will continue through today as a 5950 high pressure center in the Rockies will keep the main upper level jet well to the north.
215 AM EDT Wed Jul 21 2021 A crossing cold front will bring the risk for showers and thunderstorms overnight and into Wednesday morning.
300 AM CDT Wed Jul 21 2021 Early this morning the upper ridge continues to extend from the southwest states into the central and northern Plains. At the surface, high pressure continues across eastern Kansas with winds light to calm resulting in some patchy fog. Little change in the upper air pattern is expected with a ridge over the central and southern Plains with the main westerlies confined to the northern Plains.
1235 AM CDT Wed Jul 21 2021 Upper level trough continues to spin counter clockwise across our airspace attm with this feature expected to rapidly retrograde back to the west during this TAF period. The regions of PoPs outlined in the grids through 06Z are consistent with where we still see precipitation at this hour, along the northwest flow associated with the weak closed low to our southeast over southern Louisiana. As this low continues to retrograde, slight chances of PoPs will be carried through the overnight hours in north central Louisiana.
JB Chattanooga Airport, TN 87 70 90 71 90 / 20 10 40 10 40 Knoxville McGhee Tyson Airport, TN 90 68 91 69 92 / 10 10 20 10 30 Oak Ridge, TN 89 68 90 67 90 / 10 10 10 10 30 Tri Cities Airport, TN 88 62 89 62 90 / 10 10 10 10 20.
1049 PM CDT Tue Jul 20 2021 High pressure at the surface will shift southeast tonight and allow a southerly wind to develop. This will bring warmer low temperatures with more areas bottoming out in the mid 60s tonight. Upper level ridging builds into the area on Wednesday with a mid level wave expected to move through ND into northern MN. The inversion will once again not be too strong so dew points will remain in the lower to mid 60s. Highs will be a bit warmer, ranging from roughly 85 to 95, with the warmest readings in central SD.
327 AM EDT Wed Jul 21 2021 Dry and slightly cooler today behind a cold front.
An upper level trough will remain persistent over the eastern US through much of the weekend. Morning lows in the lower 70s for most areas. Highs this afternoon will be warmer due to more sunshine this afternoon. Overnight lows tonight falling into the lower 70s once again. Guidance continues to indicate upper low retrograding well to our west with upper trough continuing over the east coast and upper ridge just to our S/SW, providing a weak NW flow aloft for our forecast area (FA). Ensemble guidance indicates the east coast upper trough to linger through most of the period with some lifting north possible late in the forecast period. Will generally expect scattered mainly diurnal showers and thunderstorms through the period, lesser chances Sat/Sun with the lower PW's, trending up some early to mid week, in line with latest NBM POPs.
337 AM EDT Wed Jul 21 2021 Surface analysis this morning reveals an expansive area of weak high pressure across much of the Midwest and Great Lakes region with influences stretching well into the Ohio and Tennessee Valleys. The drier air combined with mostly clear skies and light winds will allow temperatures to drop into the low to mid 60s by sunrise tomorrow, with urban areas slightly warmer.
244 AM CDT Wed Jul 21 2021 An upper low continues to spin and move westward across central TX at this hour triggering some showers well south of the area. Some of the valleys across NW AR are likely a little cooler thus why satellite imagery is picking up fog within the valleys. The upper low will continue to migrate westward across central Texas through the day today which will continue to bring easterly winds and will keep temperatures a tad below normal but still rather warm.
Some of the hi-res models develop more showers across south Alabama during the pre-dawn hours while other models keep activity closer to the upper trof axis across north Alabama. The influence of the upper low/troughing wanes by the end of the week as upper level ridging builds across the Mid Mississippi River Valley.
1252 AM EDT Wed Jul 21 2021 A cold front will sweep through central Pennsylvania on Wednesday, ushering in cooler temperatures and refreshingly low humidity for the rest of the work week before rain chances, heat and humidity make a comeback for the weekend. Heights will be on the rise across the NW half of the area on Wed as cooler, drier air is advected in from the NW. Showers and storms will again be possible in eastern zones through Wed afternoon as the upper trough axis and sfc cold front swing through in the presence of 1500 J/kg MLCAPE and DCAPE of 800-900 J/kg.
105 AM MDT Wed Jul 21 2021 Western CONUS ridge will remain in place supporting hot and mainly dry conds in the period most places. Weak ridge topping impulses combined with bouts of monsoon moisture will support isold TS at times. Diurnal heating combined with LL moisture will be sufficient for isolated storms via mid ridge convergence.
301 AM EDT Wed Jul 21 2021 Surface analysis this morning reveals an expansive area of weak high pressure across much of the Midwest and Great Lakes region with influences stretching well into the Ohio and Tennessee Valleys. The drier air combined with mostly clear skies and light winds will allow temperatures to drop into the low to mid 60s by sunrise tomorrow, with urban areas slightly warmer.
1247 AM EDT Wed Jul 21 2021 A weak and dry cold front pushes through the region overnight with slightly cooler weather for Wednesday.
328 AM EDT Wed Jul 21 2021 Unsettled but generally benign weather will continue through the remainder of the work week as an upper trough persists over the region.
1001 PM CDT Tue Jul 20 2021 (Issued 1000 PM CDT Tue Jul 20 2021) The cold front has cleared most of southeastern WI and is currently sitting just east of Madison. High pressure builds in for Wednesday with the high shifting east into lower MI Wednesday night.
Expansive anticyclonic flow dominates the upper tropospheric flow pattern over the western 2/3rds of the CONUS early this morning, with the ridge axis along the Montana/North Dakota border. A subtle H500 perturbation cresting this ridge axis was bringing showers and storms to the Dakotas and will slide southeastward later today. Smoke/haze from wildfires to the northwest will persist for the bulk of the day, but winds switching to the south on the backside of the H850 ridge will start pushing the smoke plume back north.
348 AM EDT Wed Jul 21 2021 A cold front will sweep through central Pennsylvania today, producing scattered showers and thunderstorms later this morning and this afternoon. Behind the front, cooler and refreshingly less humid conditions are expected for the rest of the work week before heat and humidity make a comeback for the weekend.
Most areas are seeing temperatures a little cooler compared to 24 hours ago as onshore gradients are slightly stronger. Little change expected the next couple of days as the weak trough lingers along the West Coast. Modest warming is expected heading into the weekend as high pressure strengthens a bit and modified marine influence wanes inland, and highs will warm to a little above normal.
641 AM EDT Wed Jul 21 2021 A cold front will sweep through central Pennsylvania today, producing scattered showers and thunderstorms later this morning and this afternoon. Behind the front, cooler and refreshingly less humid conditions are expected for the rest of the work week before heat and humidity make a comeback for the weekend.
250 hPa upper air analysis continues to show a long wave ridge positioned over the western CONUS. This ridge is expected to slowly build to the East today through the end of the week and bring higher heights into the Central Plains. At the surface, latest WPC analysis shows a high pressure system centered over southeastern Nebraska. Calm winds at the center of this high pressure and a saturated boundary layer has allowed very patchy fog to develop in far southeastern Nebraska and southwestern Iowa early this morning. Today, temperatures are expected to be in the mid to upper 80s with winds becoming more southerly as the high pressure systems moves to our east.
Cooler than average overnight temps for late July are resulting in radiation valley fog across northwest AR. /Issued 244 AM CDT Wed Jul 21 2021/ An upper low continues to spin and move westward across central TX at this hour triggering some showers well south of the area. Some of the valleys across NW AR are likely a little cooler thus why satellite imagery is picking up fog within the valleys. The upper low will continue to migrate westward across central Texas through the day today which will continue to bring easterly winds and will keep temperatures a tad below normal but still rather warm. Southerly flow returns Thursday as the upper low continues to shift westward across central Texas which will signify the beginning of the heat and humidity returning to the area.
An upper level low drifts from Eastern Texas this morning to Central Texas this evening to Western Texas by late Thursday.
Early this morning the upper ridge continues to extend from the southwest states into the central and northern Plains. At the surface, high pressure continues across eastern Kansas with winds light to calm resulting in some patchy fog. Little change in the upper air pattern is expected with a ridge over the central and southern Plains with the main westerlies confined to the northern Plains.
616 AM CDT Wed Jul 21 2021 (Today and tonight) Dry and slightly cooler weather is in store for today.
A weak cold front will stall over northwest Montana and the Idaho panhandle this afternoon, bringing some increased winds. The weak cold front will move through the rest of western Montana and central Idaho on Thursday.
534 AM MDT Wed Jul 21 2021 Western CONUS ridge will remain in place supporting hot and mainly dry conds in the period most places. Weak ridge topping impulses combined with bouts of monsoon moisture will support isold TS at times. Diurnal heating combined with LL moisture will be sufficient for isolated storms via mid ridge convergence.
721 AM EDT Wed Jul 21 2021 Unsettled but generally benign weather will continue through the remainder of the work week as an upper trough persists over the region.
(Today through Thursday afternoon) By Wed the subtropical ridge will be centered INVOF 4-Corners region and the mid-level trough will have pinched off from the wlys with the remnant cyclonic circulation well to e of W TX. Otherwise "the summer that wasn't" will continue on as the low mid- level heights directly support below normal high temperatures even thru Fri the 25th. Thereafter a more typical presence of the subtropical ridge is indicated and thus warmer.
702 AM EDT Wed Jul 21 2021 Dry and slightly cooler today behind a cold front. A surface cold front is sagging south of the area with high pressure building back in behind it. The low clouds are moving in from the north as a result of low-level moisture being trapped under the stable inversion. Otherwise, expect mild and dry conditions today and tonight with northerly winds bringing slightly cooler temperatures.
Today through Thursday night Upper high over the Four Corners region today will allow for a dry northeasterly flow aloft across the Panhandles. Upper low over central Texas later today and tonight will track slowly west into west Texas Thursday and southwest Texas Thursday night.
An upper level trough passing mainly to our north this week will limit the degree of inland heat through Thursday, while areas of marine layer clouds and northwest onshore breezes keep coastal areas seasonably cool. Mid/upper-level troughing associated with a low near the southern British Columbia coast will sag a bit closer to northwest California today.
703 AM EDT Wed Jul 21 2021 A cold front will sweep through central Pennsylvania today, producing scattered showers and thunderstorms later this morning and this afternoon. Behind the front, cooler and refreshingly less humid conditions are expected for the rest of the work week before heat and humidity make a comeback for the weekend.
1035 AM EDT Wed Jul 21 2021 Mean layer ridging remains in place across the Florida Keys. The 12Z heights from 925-500 mb increased this morning, with low level ridging stretching west across South Florida. The best chances will be as steering flow collapses later this afternoon, allowing congestus to build along and just in the lee of the Lower Keys. Weak high pressure centered over the central Atlantic and extending westward to the Florida peninsula will maintain light to gentle, mainly east to southeast breezes through the rest of the work week. Breezes will become light and variable this weekend as the ridge weakens further and shifts southward toward the Keys.
635 AM EDT Wed Jul 21 2021 A cold front will sweep through central Pennsylvania today, producing scattered showers and thunderstorms later this morning and this afternoon. Behind the front, cooler and refreshingly less humid conditions are expected for the rest of the work week before heat and humidity make a comeback for the weekend.
An upper level trough will remain persistent over the eastern US through much of the weekend. Highs this afternoon will be warmer due to more sunshine this afternoon. Overnight lows tonight falling into the lower 70s once again. Guidance continues to indicate upper low retrograding well to our west with upper trough continuing over the east coast and upper ridge just to our S/SW, providing a weak NW flow aloft for our forecast area (FA). Ensemble guidance indicates the east coast upper trough to linger through most of the period with some lifting north possible late in the forecast period. Will generally expect scattered mainly diurnal showers and thunderstorms through the period, lesser chances Sat/Sun with the lower PW's, trending up some early to mid week, in line with latest NBM POPs.
711 AM EDT Wed Jul 21 2021 A cold front will cross the area tonight into Thursday.
747 AM EDT Wed Jul 21 2021 Precipitation chances should end today as a cold front crosses and exits the region. Dry and cooler weather should return Thursday under high pressure. Lingering isolated showers and some tstms will persist, mainly across the ridges and I-80 corridor as a cold front treks across the forecast area. Temperature should be cooler than in recent days, with highs around 5 degrees below average.
A ridge of high pressure aloft is forecast to build over the four state region through Thursday. The warm air aloft, along with persistent ridging in the low-levels should prevent diurnal convection from forming over most of the region.
1009 AM EDT Wed Jul 21 2021 High pressure builds in by this afternoon, providing dry conditions with near or below seasonal temperatures. Bubble of high pressure shifts further south on Thursday and will position itself directly over the state of Ohio Thursday morning. Temperatures look to be slightly below normal with Thursday's highs generally in the lower 80s.
520 AM EDT Wed Jul 21 2021 Isolated showers should end today as a cold front crosses and exits the region. Dry and cooler weather should return Thursday under high pressure. Temperature should be cooler than in recent days, with highs around 5 degrees below average.
927 AM EDT Wed Jul 21 2021 A cold front will cross the area tonight into Thursday.
Moisture stream continues to be evident on latest WV imagery west of the ridge axis over the four corners region up into southeast Wyoming. Additional storm development is expected later this afternoon initially along the higher terrain in southeast Wyoming.
737 AM EDT Wed Jul 21 2021 Latest RAP model shows deep layer ridging from the Atlantic residing over most of FL and the eastern half of the Gulf of Mexico through this evening. Highs reach the lower to mid 90s with the beaches a bit cooler. Atlantic high pressure with a relaxed gradient stretches across the waters through the weekend with an axis generally south of the area.
High pressure over the Four Corners will keep the weather fairly persistent for Southwest California through the week.
An upper level ridge is currently centered over the Four Corners Region. An upper level trough and closed low was centered off British Columbia, which is causing upper ridging to extend north into western Canada. Regarding high temperatures, the influence of the upper ridge and warmer temperatures aloft will bring warmer temperatures than the past few days. On Thursday, the upper ridge axis will nudge further east, allowing hot temperatures to cover all of western and north central NE.
Today Through Thursday Night Weak low pressure from the Tennessee Valley to Texas will separate from broad troughing from New England to the Ohio Valley the next couple of days. Eventually, any semblance of low pressure will get swallowed by a strengthening ridge of high pressure building over Arkansas from the Plains. As the ridge becomes more dominant, a stationary front along the Gulf Coast will slowly lift to the north and wash out.
An approaching cold front will set off some elevated thunderstorms over the higher terrain of central MT which will track into NE Montana during the afternoon and overnight hours.
Surface analysis this morning reveals an expansive area of weak high pressure across much of the Midwest and Great Lakes region with influences stretching well into the Ohio and Tennessee Valleys. The drier air combined with mostly clear skies and light winds will allow temperatures to drop into the low to mid 60s by sunrise tomorrow, with urban areas slightly warmer. Behind this weak surface boundary, a high pressure system will continue to push further southeast from the Great Lakes.
A persistent longwave pattern will remain in place aloft, with troughing over the northeast CONUS, and ridging over the middle of the CONUS.
Cooler and more comfortable weather will follow for much of the rest of the work week. Cold front continuing to slip south of the area early this morning, but upper trough lagging behind. Overcast along with a few showers this morning as the trough pushes through, then dry weather this afternoon under gradually clearing skies. Mainly clear and cool tonight with high pressure drifting into the region. A very pleasant day on tap with low humidity and highs generally in the low to mid 70s.