Aikyam-Lab/Synoptic-Bench huggingface dataset:
1130 AM EST Tue Jan 24 2017 Forecast largely on track today with a welcomed ridge building in. /Issued 600 AM EST Tue Jan 24 2017/ Quiet weather in store today as a weak ridge of dry high pressure drifts over the area by days end. A weak cold front is forecast to move to the TN valley late Wednesday with increasing clouds expected for mostly the n and w cwa and small chances for late day showers over the far nw.
1144 AM EST Tue Jan 24 2017 Low pressure off the mid Atlantic coast will continue moving northeast today. High pressure will build in from the west through Wednesday.
1236 PM EST Tue Jan 24 2017 Scattered light rain and snow will diminish through the afternoon as low pressure exits toward New England.
446 PM EST Tue Jan 24 2017 Late this afternoon through tonight: Latest surface analysis shows a deep low pressure center off of the New England coast with an extending cold front to the south, over the Atlantic. High pressure was the dominating feature this afternoon over our region with breezy west northwest winds and clear skies.
1038 AM CST Tue Jan 24 2017 No major changes to the forecast, still appears that the highest snow amounts will fall over the central/south central sections of the cwa per radar trends. Left exit region will support cyclogenesis to our south today, with a low pressure system that will track across the Central Plains before hooking northeast into the Midwest. Mixed winds on the backside of this system are not particularly strong, on the order of upper teens with gusts into the low 20s (knots). Profiles also suggest light snow lingering through much of the week, particularly in the eastern CWA thanks to the upper trof lingering across the Western Lakes region, with low level saturation within the dendritic growth zone. Expect upper level ridging along the west coast and into western Canada with upper level troughing across eastern Canada/eastern U.
Light snow associated with a low pressure system tracking east across WY will affect KEKS and KBZN terminals early this morning with mainly MVFR conditions with improvement expected late this morning.
141 PM EST Tue Jan 24 2017 Low level moisture slow to exit with weak high pressure moving in. Progressively colder mid and late week with passage of a cold front and lingering northwest flow. Upper level trough aloft will continue its exit, with ridging taking over later tonight. Low level moisture connection will gradually erode after 15Z this morning while warm air advection off the surface also eliminates the thermal trough over the northeast mountains. The result in the sensible weather will be low level cloud cover that will be stubborn to dissipate, ending snow in the highest ridges of the northeast mountains, and ending drizzle later this morning.
Nearly zonal flow aloft will transition to a southwest flow as an upper trough over the western conus moves east over the Great Plains.
Longwave trough axis still anchored across the Rockies Wednesday morning. The highly positive tilted axis pinching off the mild and moist air in the mid levels from reaching into Lower Michigan, as average temps in the 850-700 mb layer reside in the zero to -4 C range. None-the-less, still sufficient warm layer in the sfc-925 mb layers to support all rain as 993-995 mb low pressure remains on track to slide east through southern Lower Michigan, but slower timing, Wednesday Evening/Night. With the warmer air at 850 mb getting pinched off, NAM has backed off on the instability, as showalter index remains solidly positive, but still good mid level lapse rates (700-500 MB) to support a remote thunderstorm chance, but not worthy of inclusion in zones due to the lack of available moisture at that level.
Lows tonight will be in the lower 40s inland and near 50 at the coast.
Expect much cooler temperatures Wednesday, with highs 55 to 65, and gusty northwest winds will prevail.
1140 AM CST Tue Jan 24 2017 No major changes to the forecast, still appears that the highest snow amounts will fall over the central/south central sections of the cwa per radar trends. Left exit region will support cyclogenesis to our south today, with a low pressure system that will track across the Central Plains before hooking northeast into the Midwest. Mixed winds on the backside of this system are not particularly strong, on the order of upper teens with gusts into the low 20s (knots). Profiles also suggest light snow lingering through much of the week, particularly in the eastern CWA thanks to the upper trof lingering across the Western Lakes region, with low level saturation within the dendritic growth zone. Expect upper level ridging along the west coast and into western Canada with upper level troughing across eastern Canada/eastern U.
By midweek a strong ridge will build over the Pacific Northwest. This will bring dry and cooler weather with an abundance of low clouds and fog in the valleys. Not much in the way of moisture or dynamics with this feature, however, in the lower layers it has increased the isentropic up-glide enough for some light snow to get squeezed out of the stratus.
The low will spread east today. Ahead of the low across southeastern Kansas and the Missouri Ozarks, southerly winds will occur ushering warm temperatures as highs warm into the 60s. Cooler conditions will spread into the area bringing temperatures closer to seasonal norms with highs in the upper 30s to the lower 40s and lows in the 20s. An upper level trough will extend out of the Great Lakes into the south Plains behind the front from mid week into the weekend. Windy afternoon and evening for the TAF sites as low pressure moves off to our northwest.
High pressure aloft will provide mostly dry but cloudy weather through Wednesday.
I issued a Freezing Fog Advisory for the Foothills of the Blues and North Central Oregon until noon to cover the low visibility and slick roads where the stratus deck intersects with the surface between 1200 and 2500 ft MSL. Northerly flow from the building offshore ridge may trigger a few snow showers in upslope areas of the northeast OR mountains. A large upper level trough continues over the western United States with most its storm energy south and east of the Pacific Northwest. Meanwhile an upper level ridge is approaching the West Coast which is beginning to place the Pacific Northwest under a northerly flow.
409 PM EST Tue Jan 24 2017 Mild high pressure will build into the area in the wake of the deep low pressure system lift northeast up the northern Mid Atlantic coast.
245 PM EST Tue Jan 24 2017 A welcomed relatively benign and low impact forecast on tap as a mid/upper ridge of high pressure will dominate into Wednesday.
212 PM EST Tue Jan 24 2017 Low pressure south of Long Island will continue to track to the northeast. High pressure will build into the area this afternoon through Wednesday. A cold front will pass through the area Wednesday night. An upper level trough will move over the eastern Canada for the end of the week and into the weekend. Another cold front crosses the area late in the weekend. Mid Atlantic remains under influence of cyclonic flow as strong low pressure is positioned south of Long Island. High pressure over the region Wednesday. Highlands will be a little cooler with temperatures reaching the lower 50s. A cold front will be moving through the region Wednesday night, bringing a chance for rain showers.
Cold front will move into the BVO area around mid evening, pushing south to a MLC/FYV line around 09Z.
139 PM PST Tue Jan 24 2017 The large cold low pressure system moving inland through the western states will continue scattered showers through this evening, focused over coastal and inland valleys of San Diego County, along with a slight chance of thunderstorms.
252 PM EST Tue Jan 24 2017 Strong low pressure continues to move northward in New England with high pressure building into the local area through early Wednesday.
High pressure and unseasonably mild conditions will briefly return for Wednesday before another low pressure system brings light rain for Wednesday night.
312 PM CST Tue Jan 24 2017 A chance for snow late tonight into Wednesday with a gradual trend towards cooler temperatures. Guidance continues to trend just slightly further south with the track of the low, and with a sharp northern gradient expected, this has resulted in less snow forecast for northwest Wisconsin. As the low deepens, northerly flow will develop at low to mid levels resulting colder air being advected in from the north. Lows tonight in the mid to upper 20s - while there will be little in the way of radiational cooling, some cooler air will advect in as winds turn northerly.
This partial lull with last through Wednesday morning, then HRRR is showing another weak trough moving through the area Wednesday afternoon with a minor uptick in areal coverage of snow showers.
Ridging aloft will remain in place across the region through tonight and Wednesday. At the surface, high pressure currently over the souther Gulf of Mexico/Yucatan peninsula region will continue to shift toward Florida tonight and then just east of the state by the end of Wednesday. As this happens and the low off the New England coast continues to move farther away, the pressure gradient will continue to relax, with light and variable winds expected tonight. Period will begin with high amplitude U/L pattern across the CONUS with a positively tilted L/W trough from the Great Lakes to the desert southwest. A strong subtropical U/L ridge will be located over the Caribbean and Florida Straits.
1246 PM EST Tue Jan 24 2017 Low pressure off of New Jersey will move up the coast through the day. High pressure in the central plains will briefly ridge into the region on Tuesday.
Cooler and drier air, closer to seasonal normals anyway, will prevail in the wake of this front as a broad upper trof becomes established over much of the CONUS. Until then, we are expected to remain cool and dry through the weekend with persistent NW flow at the SFC and in the low levels underneath a fast westerly flow aloft.
The unseasonably warm temperatures will come to an end as a cold front quietly sweeps through North and Central Texas late tonight. Temperatures will be cooler tomorrow, but the coldest air will take some time to filter into the region. The high clouds over North Texas this evening will gradually shift southward during the overnight and morning hours, and finally clear the region by sunset Wednesday.
149 PM EST Tue Jan 24 2017 Clouds linger under weak high pressure. Warm Wednesday before turning progressively colder mid and late week with passage of a cold front and lingering northwest flow. Shower activity should subside as high pressure builds and waa occurs.
325 PM EST Tue Jan 24 2017 Mild high pressure will build into the area in the wake of the deep low pressure system lift northeast up the northern Mid Atlantic coast.
1133 AM CST Tue Jan 24 2017 Strong southerly winds in response to deep low pressure over the central plains will draw increasing gulf moisture into SE TX this afternoon.
Ridging aloft moves in tonight. and cold front will move through TN from west to east during the day Wednesday.
A low pressure system moving east across northern Mexico will maintain shower activity over southeast Utah through today. High pressure aloft will strengthen across the region during the midweek period.
Mid and high level clouds were beginning to spread over the area from the west as a cutoff upper level low was slowly moving to the east across the southern plains. After sunrise temperatures will begin to climb into the 50s as the upper low continues to move east through today helping to build a short-lived ridge over the region. The upper low will move east across the southern plains becoming an open trough overnight tonight.
1035 AM EST Mon Feb 13 2017 High pressure moving into the forecast area from the west today will be over the area tonight and off the Southeast Coast Tuesday.
Will start out this morning will at persistent 500mb trough overhead, that will slide to our east Tuesday morning. trough Tuesday afternoon and evening.
An amplified upper-level ridge centered over the Pacific Northwest Coast will extend north into British Columbia and the Yukon Territory this morning. By Tuesday the ridge axis slides over the Northern Rockies turning local flow aloft to northerly.
WV imagery indicates a closed off upper level low shifting slowly eastward across the Desert Southwest creating a difluent southwest flow aloft across the Western High Plains. Near the surface, a broad area of high pressure is drifting east across the Central Plains. An upper level low will move along southern portions of New Mexico today, then into western Texas tonight. Highs today will only reach into the 40s with lows tonight falling to around freezing.
530 AM CST Mon Feb 13 2017 High pressure centered over northwest Missouri early this morning will move slowly southeast across the area today. Skies will mostly cloudy today as sct-bkn high clouds stream northeastward ahead of a upper low moving into the southern High Plains. Temperatures the past few days have verified at or above the warm side of guidance, so will go with the warmer GFS MOS guidance today.
356 AM MST Mon Feb 13 2017 The current satellite water vapor image is showing a low pressure system sliding across the Mexico US boarder this morning. This low is advecting moisture into Colorado. Short term high resolution models are indicating that wrap around moisture associated with the previously mentioned low pressure system will continue to support rain and snow showers over southern portions of the western slope through at least Tuesday morning. Weather conditions are anticipated to improve Tuesday as the low pressure system continues to track east into the Great Plains and high pressure builds over the Great Basin and Intermountain West.
839 AM EST Mon Feb 13 2017 A weak cold front was moving through the region this morning, with some low stratus along and south of the boundary, with mainly clear skies to the north. IFR conditions at KGNV will improve this morning after the cold front pushes through.
628 AM EST Mon Feb 13 2017 High pressure moving into the forecast area from the west today will be over the area tonight and off the Southeast Coast Tuesday.
A surface analysis this morning showed high pressure over central Missouri with light northerly winds across the region. For today, plan on quiet and dry weather as the aforementioned high pressure slides east, reaching central Kentucky later this afternoon and evening.
754 AM EST Mon Feb 13 2017 The combination of surface ridging and confluent upper level flow will lead to period today and tonight of low sky fraction. Continued erosion and eastward progression expected as inversion heights lower further with upper level ridge axis moving overhead. Continued low level warm advection this evening and tonight, but there is room for winds to attempt to decouple in the evening before the low level jet (40 knots at 925 mb) arrives overnight.
913 AM EST Mon Feb 13 2017 Multi layered high pressure is in place over South Florida and the Keys this morning. A trough is diving off the east coast states with the parent low moving off Maine and heading for the Canadian Maritimes. Another low over the Desert Southwest and Rio Grande Valley is cutoff from the flow due to the blocking trough mentioned before. High pressure is the controlling matrix for the Keys area today again.
High pressure over Missouri this morning will move east to Kentucky by this evening and on to the Carolinas by Tuesday morning.
High pressure will return with fair and mild conditions for Tuesday.
/issued 355 AM CST Mon Feb 13 2017/ SHORT TERM (Today through Tuesday):Well advertised arrival of the cold front still on track for Tuesday as the H5 trough sweeps across North Texas. But the arrival of the surface forcing with the front during the morning, along with the passage of the H5 trough through North Texas, will bring a good shot for showers and a few thunderstorms.
522 AM EST Mon Feb 13 2017 Scattered snow showers will continue this morning but conditions should improve later today as high pressure builds overhead. Continued improvement is expected this morning has high pressure builds and the influencing low pressure system shifts further east. Otherwise, once precipitation ends, high pressure will maintain dry conditions across the area through Tuesday. trough. A cold front will dive through, returning cold advection and northwest flow.
Meanwhile, warm advection is forecast to persist through today with thermal ridging building toward the state by late in the day. Therefore, have remained on the high end of guidance for today with low to mid 50s from Highway 30 on south to mid 40s over the snow areas in the far northeast. Winds will gradually shift to the northwest tonight as a trof axis passes through the state, but the bigger push of colder air doesn't arrive until later Tuesday.
546 AM CST Mon Feb 13 2017 255 AM CST High pressure is centered over northern Missouri early this morning with ridging extending across portions of the Midwest providing fair weather conditions to much of the region today. Light winds this morning will become a modest southwest breeze this afternoon as the ridge axis shifts to our east and low pressure drops across the Canadian Prairies.
A closed upper low continues to move east across the northern Baja this morning and is forecast to gradually open and continue east along the International border through the early part of the week. At the surface, high pressure has moved southeast of the area with weak southwesterly low level flow providing weak warm air advection. Highs today should mix out into the lower 50s with some slightly cooler readings across our far south which should be under thicker cloud cover.
The main focus has been on temperatures, and specifically adjusting warmer than the blend.
711 AM EST Mon Feb 13 2017 High pressure will build into the region from the west through tonight.
A cold front passed through overnight and winds are now northeast at the sfc under a frontal inversion at 950 mb. /issued 343 AM CST Mon Feb 13 2017/ Surface observations shows a cold front slowly moving south across the forecast area early this morning. Water vapor imagery shows an upper level low is currently moving eastward across the Baja of California and northwest Mexico. This low is still expected to track into eastern Texas by Tuesday afternoon. At the same time, another upper trough will be dropping south across Canada to the Great Lakes.
Meanwhile farther upstream, 1032mb high is centered over the cntl Plains and ridging swd, providing for a nerly/erly flow behind the front. As the front slips farther into the coastal waters today, somewhat drier and definitely cooler air will filter over the forecast area. will have to watch to see how much impact serly low-level flow behind the high will have as far as potential fog development late tonight.
High pressure was centered over the central CONUS this am as clear skies in the area were allowing temperatures to drop into the 20s this morning. To the south and west of the area, a cut off upper level low was slowly lumbering east across the southern Rocky Mountains. With northwest flow aloft, this low is forecast to stay south of the area through the short term period.
1114 PM EDT Tue Mar 31 2020 Low pressure developing off the Carolina coast and an upper trough overhead will generate some light showers over Central PA tonight and Wednesday morning. Conditions will improve Wednesday afternoon as high pressure moves in for a few days.
The deeper and normally colder valleys may see patchy frost late tonight into early Thursday morning, along with some patch fog where it is slightly warmer. Thursday as a whole, however, looks to be partly cloudy and much warmer, with highs ranging from the upper 50s to lower 60s across the area by the afternoon.
210 AM CDT Wed Apr 1 2020 Flow aloft becomes southwesterly today as a narrow corridor of upper ridging builds in.
NewFound Gap temperature has already dropped below freezing. This will allow for snow accumulations across the higher elevations, such as the Smoky Mountains, Roan Mountain, and higher terrain of southwest Virginia (High Knob). Snowfall of 1 to 3 inches across the highest terrain. LW Chattanooga Airport, TN 58 40 67 45 72 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 54 39 64 42 69 / 10 0 0 0 0 Oak Ridge, TN 54 39 65 43 69 / 10 0 0 0 0 Tri Cities Airport, TN 51 36 61 35 67 / 10 10 0 0 0.
Sunny skies and seasonable temperatures will reign for the remainder of the day as a weak high pressure ridge remains in control of the region. This high pressure ridge will continue to build during the day and overnight tonight.
Satellite indicates a broad and cold upper level trough squatting over the northwestern US with models suggesting no inclination to go away anytime soon. but the upslope on into the Cascades may taper off and become more amorphous by dawn as the center of the upper low begins to move through. Wednesday will feature weak flow aloft in the cusp of the upper trough. /Fugazzi 06Z TAFS: A cold and unstable trough will remain over the region through 06Z Thursday.
Dry weather will continue Wednesday as breezy southerly flow draws warmer temperatures into the region. Highs are expected to reach the low to mid 70s across the forecast area.
High pressure and drier air will move in towards the end of the week, bringing mild conditions into the weekend. Still may see some light snow mix in with the rain across the higher terrain through the overnight hours tonight. Little change in conditions is expected through the near term as upper low slowly rotates through the Northeast U. Still enough cold air aloft and when the diurnal cooling of the boundary layer occurs, there is the chance of a bit of snow mixed in with the rain but it will not result in much, perhaps a very light accumulation at the highest elevations.
Temperatures at the surface and aloft suggest that this will be very light rain or sprinkles, though isolated very light snow or freezing drizzle are possible. This feature will move east today as weak upper ridging approaches from the Plains. Thursday should be partly sunny and mild, with highs in the low to mid 50s, except much cooler near the bay and lake.
Height falls will spread across the high plains ahead of an upper trough on Thursday with pronounced ridging/southwest flow aloft in advance.
1246 AM CDT Wed Apr 1 2020 High pressure will dominate the Midwest through Thursday bringing dry conditions.
Highs will warm into the upper 60s to the lower 70s this afternoon. Winds will not be as gusty across the eastern Ozarks closer to the high pressure.
Today Through Thursday Night Northerly winds will continue to carry cooler air into the state through Wednesday morning, cooling the low temperature tomorrow morning to the lower to mid 40s.
High temperatures will generally be in the lower and middle 50s, but some locations east of I-75 may not make it out of the 40s where cloudiness will be more persistent. Tonight a long surface pressure ridge reaching from the Great Lakes to the central Gulf coast will bring calm winds and clearing skies. Winds will be light out of the east, so warming will be limited with highs only reaching the low to mid 60s.
Despite an increase in high clouds, temperatures should be several degrees warmer than yesterday. Modest elevated moisture transport on the low level jet will result in weak instability, which may promote isolated showers/storms by early Thursday morning generally east of the I-135 corridor. Otherwise, somewhat better chances for showers and storms are expected late Thursday afternoon/evening, as a strong cold front advances southeastward across the central Plains.
Given the highs today went several degrees cooler than the NBM numbers.
400 AM CDT Wed Apr 1 2020 Late night sfc analysis shows high pressure centered just to our nw. Water vapor imagery shows a dry nwrly flow in place aloft behind troffing over the ern CONUS while EPac moisture is noted upstream flowing over ridging in place over the sern Rockies/TX. Conditions remain cooler than recently with just an enhancement of cirrus expected as moisture continues to spill over the approaching ridging aloft.