Aikyam-Lab/Synoptic-Bench huggingface dataset:
400 AM PDT Thu Jun 29 2017 High pressure, centered about 300 nautical miles offshore, continues to dominate weather conditions across the forecast area. Northwest flow continues aloft due to the fringe effects of an upper level trough centered over the northern Rockies. Little change is expected in the weather through the forecast period as high pressure generally remains in control.
316 AM EDT Thu Jun 29 2017 Dry conditions overnight will be short lived as a warm front approaches from the southwest bringing rain chances back to the forecast thursday.
Looking aloft, an upper level trough across the S LA Gulf Coast is generating scattered to numerous showers and thunderstorms from the SE TX Coast across the S LA Coast this morning. This upper level trough is forecast to slowly move northeast today and thus, convection along the coast this morning will gradually continue to push inland towards the northeast. /issued 359 AM CDT Thu Jun 29 2017/ Persistent upper low centered over srn LA continues to generate convection along the TX/LA Gulf coast this morning. Overall flow over the CONUS is zonal, with a developing trof over the Rockies attm. Trof over the Rockies to eject into the Plains Friday, and weaknesses aloft will interact with the sea breeze to bring additional, mainly diurnal convection to the region again.
256 AM PDT Thu Jun 29 2017 High pressure will build over the Pacific Northwest today into Friday bringing light winds and mainly clear skies.
313 AM EST Fri Nov 24 2017 A warm front front will lift northeast through southern Canada today through tonight. A cold front will approach from the west on Saturday and will cross the region Saturday afternoon and evening.
305 AM CST Fri Nov 24 2017 Today starts out quite mild, as light south winds keep overnight lows well above freezing. A dry cold front will begin moving through the region during the late morning hours. An upper level ridge builds for the weekend, keeping mostly clear skies and above average temperatures.
309 AM CST Fri Nov 24 2017 A stubborn upper ridge over the southwestern CONUS will tenaciously hang on through the weekend. This portends dry weather for these parts as the flow aloft over the region switches from northerly around the upper ridge, to northwesterly around the upper ridge due to the passage of an upper trough translating southeastward through the midwest U. We'll likely be dealing with record high temperatures today as h85 temperatures warm under the eastern extent of the said upper ridge. Fortunately, the upper trough traversing the Midwest will send a cold front south through region on Saturday on gusty northerly winds.
Slow moving cold front extends from the Blues to the John Day highlands this evening. A weak ridge with drier westerly flow on Friday will bring partly sunny skies. The airmass is much cooler aloft and highs will be in the 50s. Generally VFR conditions with light winds are expected through the next 24 hours as transitory ridging builds into the region Friday. Patchy fog will be possible early Friday morning in protected valleys and other low spots where cooler air can pool, but at this time confidence is too low to include any visibility reductions for any terminals.
Highs will also be warmer than seen in the previous days. Expect slightly cooler temps on Sat with these NRLY winds.
A trailing trough/weakened front will get pulled towards the Keys and sag just southeast of the island chain by tonight. A relatively sharp mid to upper level trough positioned to the west of the state will lose amplitude, but remain relatively broad to our west/northwest through the weekend.
A weak cold front will pass over the Panhandles BTWN 24/18Z thru 25/00Z, though wind speeds remain AOB 10 kts with a wind shift from southwest to north. In addition, made minor adjustments to account for temperature trends that are slightly cooler this evening. Otherwise, we could not ask for a better late November night in the Panhandles with lows this evening and overnight expected to be in the low to mid 40s.
/issued 854 PM CST Thu Nov 23 2017/ High pressure prevails across the area with clear skies. Meanwhile temps across eastern sections near the TN River and across North Mississippi will fall below freezing. Strong radiative properties coupled with a dry airmass will cool temperatures back to subfreezing for the eastern counties.
Good mixing either side of the trough/front passage will also be conducive for a brief window of 35+mph gusts, especially west.
339 AM CST Fri Nov 24 2017 Heights aloft will fall today as an upper trough skirts by to the north with deep enhanced wind flow extending into our area as well. The pressure gradient will slowly loosen through the day Saturday, but after the near-record warmth today, Saturday morning in particular will seem a bit chilly; afternoon highs still expected into the 60s, however, a little warmer than our normals.
High pressure slides south Friday and an increasing pressure gradient will boost SSWly winds with gusts to 15-20 kts at northern terminals. Cloud cover will increase Friday evening ahead of an approaching cold front, which should remain outside the forecast area during the valid TAF period.
129 AM EST Fri Nov 24 2017 High pressure will continue to ridge into the area from the north while low pressure will lift northeastward from Florida along the stalled frontal boundary off the coast.
Went ahead and added northern Carbon and Albany Counties to the High Wind Warning and started the Laramie Valley zone now. Winds have already begun to increase over our wind prone locations and with strengthening gradients at the surface and aloft, we have decided to begin the high wind warning early this afternoon. Cooler night on tap with less wind and in the wake of the cold frontal passage. Slightly cooler day with some thickness cooling and some more cloud cover.
203 AM EST Fri Nov 24 2017 High pressure will move off to the east on Friday. A cold front will bring some light rain showers on Saturday.
Taking a second look at temps lowered temps from the middle 20s northeast to the lower to middle 30s elsewhere for the rest of the night.
Patches of light rain will end across the Valdosta region and the Big Bend this evening as a cooler and drier airmass continue to filter in from the west. Lows will range from the middle 40s northwest to the lower 50s southeast. In the upper levels a trough remains over the Southeast. High pressure will move into the region on Friday afternoon and Friday night. A weak decaying cold front will approach the region Saturday night.
247 AM MST Fri Nov 24 2017 Latest analysis shows an upper trough dropping southward across eastern Montana and western North Dakota early this morning in line with the surface cold front. Expect some light rain with the frontal passage this morning, especially over the northern Black Hills, with dry weather this afternoon as high pressure builds into the region.
357 AM CST Fri Nov 24 2017 Soggy conditions are in store for today, with cooler temperatures for Saturday. A wintry mix will be possible when the colder air behind the cold front finally arrives later this evening, in the form of a drizzle/freezing drizzle/rain/snow mix. Also, some gusty west to northwest winds are expected today, mainly over northeast Minnesota, as the cold front passes through. Cooler temperatures will return tonight and Saturday as cold air advection increases once the cold front passes through. There could be some slick roads tonight due to refreezing, especially over the north, this evening as there should be a chance of freezing drizzle possible. A mostly dry day for Saturday, with cooler temperatures as highs are forecast to range from the lower 20s over the tip of the Arrowhead to the lower 30s over the southwest.
Temperatures will be well above normal today regardless of a cold front pushing through western Kansas this afternoon.
248 AM CST Fri Nov 24 2017 A warming trend will continue today as southerly breezes increase ahead of an approaching cold front. The cold front will slip through the forecast area from nw to se tonight. Cooler temps will actually lag behind the front.
/Issued 858 PM CST Thu Nov 23 2017/ Patchy thick cirrus continues to rotate around a strong mid-level anticyclone centered just west of Baja CA this evening. Warmer air aloft spreads east during the day which will aid a modest warmup into the lower 70s across parts of eastern OK with 65 to 70 for northwest AR.
The air mass over the region is till very dry and a large diurnal range in temperatures is expected with high temperatures today warming into the lower and middle 70's. Warmer temperatures are expected tonight as low level moisture deepens. A weak cold front will cross SE TX Saturday night but moisture remains limited and upper level forcing is weak so again no precip is expected along the front.
429 AM EST Fri Nov 24 2017 High pressure will bring sunny skies and mild temperatures to the region today. A cold front will bring some light rain showers on Saturday.
1111 PM CST Thu Nov 23 2017 Temperatures well above normal are forecast through the weekend, with a cold front bringing breezy conditions Friday afternoon and a bit of a cooldown on Saturday the caveats for the short term period. Weak mid level ridging was over the Plains today, stretching from the Baja into Nebraska. Given airmass and some compressional warming component ahead of cold front, expect temperatures to reach the 60s for highs all of our CWA, with some 70s likely in southeast Nebraska. Cold front is slated to be along I-80 around 18Z Friday, with cooling effects felt in northeast Nebraska by then, but later in the afternoon southeast of the Interstate. Gradient and mixing will decrease markedly Friday evening as high pressure begins to build into the region.
The main short wave trough will swing across the Upper Midwest during the afternoon with the 23. As the cold front moves in with the short wave trough, there should be a band of weak to moderate frontogenesis in the 1000-500 mb layer. With these signals, have trended the area of precipitation chances a bit farther north with the highest chances across Taylor County. Even behind the cold front, temps will remain seasonable, with highs near or above 40 in most locales on Saturday, except for north central Wisconsin.
A weak backdoor cold front will bring some cooling to the eastern plains Saturday but temperatures will remain above average.
Increasing low level southwest flow across Lower Mi in advance of the associated sfc cold front will support aggressive low level warming. 925MB temps are forecast to rise to +7 to +11C by late afternoon, with the warmer temps actually advecting into the Saginaw Valley region. The low level warming under a late November sun angle will greatly limit daytime mixing depths. The sfc cold front will be east of Se Mi by daybreak Saturday, with post frontal cold air advection persisting through the course of the day as 925mb temps fall back into the -1 to -2 deg range. There is generally good model agreement in showing a secondary short wave tracking across srn Lower Mi Sat afternoon within an amplifying longer wavelength trough.
1212 AM EST Fri Nov 24 2017 Dry weather can then be expected until the approach and passage of a Saturday cold front. Clouds N-NE of PIT should continue to erode overnight with an exiting upper trough. Clouds will increase Friday night ahead of the next cold front. Higher rain chances along and ahead of the cold front will still be largely confined to the northern 1/3 of the forecast area, but will move in during early morning hours. Current thinking is that southerly flow and increased cloud cover will keep Friday night lows a few degrees warmer than previous forecast. Cold air aloft won't move in until Saturday afternoon in the wake of the cold front.
Models suggest winds picking up slightly out of the south in northwest zones tomorrow morning, so temps may level off in those areas near sunrise, but have slightly cooler temps from the previous forecast. Ridging influences sfc/aloft will prevail thru 25/06Z.
1230 AM EST Fri Nov 24 2017 High pressure provides dry weather today into tonight. A cold front crosses Saturday with limited moisture.
322 AM CST Fri Nov 24 2017 Forecast discussion for routine morning forecast issuance Warm and rather windy today, then cooler (but still above normal) for the rest of the holiday weekend. and Saturday A strong cyclone will track across central Ontario today. It will probably be greatest in the north--closer to the parent cyclone. Cooler air will begin pushing into the area behind the front, but incoming air mass has downsloped the Rockies and won't be that cold. Edged temps toward a blend of top performing guidance products, on Saturday, as that was a little warmer than the standard forecast initialization grid.
340 AM EST Fri Nov 24 2017 High pressure will build from the west today and then move east tonight and Saturday.
Upper-trough axis shifts to the east today with heights and thickness values rising across the area.
257 AM EST Fri Nov 24 2017 High pressure over the mid-Atlantic states this morning will briefly build northward into the Northeast today allowing skies to clear and temperatures to rise into the low to mid 40s on increasing southerly flow. A low pressure system passing to our north on Saturday will bring a trailing cold front across the North Country accompanied by scattered rain and snow showers through Saturday night.
Winds will continue to be light and variable under high pressure ridge.
1036 PM MST Thu Nov 23 2017 Sprawling upper ridge across the srn/central Rockies today, leading to a very warm Thanksgiving day over srn Colorado. On Friday, gusty west winds early will gradually become more northerly during the afternoon as cold front drops south through the region.
Cold front is pushing into southeast Oregon this evening. Areas of MVFR-IFR conditions in rain expected late tonight through early Friday associated with a weak cold frontal passage. A warm frontal passage on Saturday will bring mvfr rain showers to the region.
A weak cold front will move south across the area tonight with only minimal cooling and a moderate north wind.
855 PM PST Thu Nov 23 2017 High pressure aloft near the West Coast and weak offshore flow will continue to provide record-setting hot temperatures today for many areas.
1059 PM CST Thu Nov 23 2017 Weak high pressure was moving eastward, and southerly flow had developed across the entire forecast area. Some parts of west central MN are now gusting around 15 mph as the western trough approaches and gradient increases. Once the short wave goes by tomorrow, upper ridging will ensue across our area.
234 AM CST Fri Nov 24 2017 Record highs for today look to be broken at many sites across the region, as downslope effects ahead of approaching cold front cause temperatures to really sore this afternoon. The cold front will slide southward across Kansas by Friday night with cooler air settling over the region, however daytime highs will still be above normal for the weekend as airmass is of Pacific origins.
258 AM EST Fri Nov 24 2017 Cold front extended from near Punta Gorda to Cape Canaveral with low clouds, patchy fog, and patchy drizzle behind it. IR satellite loop showed sharp upper level trough in the eastern Gulf of Mexico. Models forecast upper level trough west of area to slowly fill through the period. Expect cool temperatures today with highs in the low to mid 70s. Overnight low temperatures will be 5 to 10 degrees cooler tonight, ranging from 48 in Williston to 60 in Fort Myers. Saturday will be mostly sunny with light winds and highs a few degrees warmer in the 70s.
A dry cold front will move through the region Friday night into Saturday morning.
134 AM EST Fri Nov 24 2017 High pressure will move off to the east on Friday. A cold front will bring some light rain showers on Saturday.
259 AM CST Fri Nov 24 2017 Today through Tonight: Latest Rap and Satellite imagery showed the region under northwest flow aloft with the upper trough tracking east of the forecast area. For today into tonight an upper trough axis which will be associated with a cold front will approach the region from the north. This will be associated with an upper jet pushing into the Southern Plains toward the Lower Mississippi Valley. Under some high clouds highs will be from the lower to middle 60s. Lows will moderate under the cloud cover with readings in the upper 30s to the lower 40s. Highs on Saturday will reach the upper 60's with some areas topping 70 before cooler air begins to filter into the region.
1026 PM MST Thu Nov 23 2017 Current surface map shows warm front pushing into the eastern Dakotas. For tonight, upper trof crosses southern Canada with cold front sliding through the northern plains.
251 AM EST Fri Nov 24 2017 High pressure provides dry weather today into tonight. A cold front crosses Saturday with limited moisture.
The exception being when a weak cold front cross the state late Friday and brings some chance for precipitation to the northern counties Saturday afternoon/evening. At this time the most likely scenario looks to be very light rain/drizzle/snow with limited chance for freezing drizzle. Sometimes these types of airmasses slip south and limit the high temperatures despite the warmer air aloft closer to 850 mb. A cold front does track through the CWA for Tue night into Wed. VFR weather is forecasted for the TAF sites as the low levels are forecasted to remain relatively dry.
Around the Northeast periphery of a large upper level ridge of high pressure over the Southwest sections of the country, high level moisture will be spreading mainly cirrus between 20-28 KFT into the ARKLATEX. Overnight lows will range from the low 30s across the eastern half of the region to the upper 30s in the western half. Frost/Light Freeze will be possible as some areas may reach the freezing mark east of a line from El Dorado Arkansas to Alexandria Louisiana.
302 AM CST Fri Nov 24 2017 Early this morning a weak mid-level trough over Canada was beginning to deepen southward into the Northern Plains. A modest pressure gradient will be present both ahead of and behind the cold front. However, short-range model guidance continues to support further compressional warming ahead of the cold front which may push high temperatures near or above record readings in the low/mid 70s. While some model guidance suggests some very light precipitation may develop (primarily across central to southeast KS), model soundings still show an abundance of dry air in the low-levels, so have stayed with a dry forecast across the southern portions of the CWA for Saturday morning. Modified Pacific air moves in for Saturday with temperatures much cooler though still above normal.
344 AM EST Fri Nov 24 2017 High pressure will pass to the south through this evening, then weaken later tonight into Saturday as offshore low pressure passes well to the southeast and as a cold front approaches from the west.
403 AM EST Fri Nov 24 2017 High pressure will remain over the Carolinas until a cold front crosses the region Sat night. WV satellite imagery this morning depicts a positively-tilted, longwave trough stretching from Atlantic Canada swwd to the Gulf of Mexico, including a well-defined perturbation now crossing the Appalachians of NC/VA. The models indicate a positively-tilted trough extending this morning from n-cntl Canada wswwd through the Pacific NW will amplify from the Great Lakes sswwd into the GOM on Sat, with the associated trough likely to reach the sern US coast by 12Z Sun. A mid-high level moist axis preceding the surface front and accompanying the aforementioned mid-upper trough --mostly above 8-10 thousand ft-- will sweep ewd across cntl NC late Sat aft through early Sat night.
The clouds in the northeast have thinned/dispersed, and temperatures were now mid-upr 40s FA-wide, with dew points ranging from the low-mid 20s. As this occurs, a Great Lakes system drops a cold front along the IL/IA border by 00Z Saturday. That gradient between the High to the east and the front to the northwest should yield increasing southerlies, perhaps with some gusts thru the teens tmrw pm, esp in the north.
107 AM EST Fri Nov 24 2017 High pressure will move slowly off the coast through Friday. This will be followed by a cold front late Saturday.
325 AM CST Fri Nov 24 2017 Area remains in northwesterly flow with trough axis situated over the SE US. Winds will gradually become southerly this afternoon and high pressure shifts off to the east and this will begin a moderating trend with temperatures expected to get back into the low to mid 70s on Saturday ahead of the next cool front expected to cross the area Saturday night.
Deep southwest flow will be in place over our CWA between a deepening trough in the western US and retreating ridge in the east.
/issued 312 PM CST Thu Nov 23 2017/ A strong upper-level ridge extending from the coast of socal into the southern plains has produced beautiful weather for Thanksgiving today with mid-afternoon temps in the 70s and light winds. The cold front will pass through late Friday and bring some northerly breezes early Saturday along with cooler air, cutting highs down into the 60s for the most part.
1153 PM CST Thu Nov 23 2017 Updated for overnight lows Made slight upward adjustment to overnight lows with readings in the lower to middle 30s for the remainder of the night. Light southerly winds across the ArkLaMiss Delta area may be just enough to keep temperatures in that area above freezing tonight. Steady light southerly winds return to the whole forecast area tomorrow, and temperatures will be a few degrees warmer than today in response.
Cold front rapidly dropping south across the area early this morning. The northwest flow will keep temperatures much cooler into the 50s today, although these readings still well above normal.
622 AM CDT Sun Apr 1 2018 Northwest flow is in place in the mid-upper levels, with ridging over the Canadian rockies. NW flow on western extent of Hudson Bay upper low will continue to keep colder temps in place through these periods, and below normal highs/lows are anticipated once again. Highs for the entire week will remain below freezing. The next chance for snow will develop on Mon afternoon and last through Tue morning as a lee cyclone moves into the Northern Plains. But high pressure and drier air over this region may well win out again, making the GFS/ECMWF more prudent at this time. Tue would likely be coldest in the wake of departing system with fresh high pressure dropping south.
732 AM EDT Sun Apr 1 2018 VFR through the period as a cold front continues to linger north of the region today.
Along the coast between the inverted trough and coast expect a sea fog which will impinge on the beaches through most of the day. for a widespread dense sea fog between the inverted coastal trough and the coast.
/issued 247 AM CDT Sun Apr 1 2018/ The midweek cold front now looks to arrive a bit earlier than advertised in previous forecasts.
1239 PM EDT Sun Apr 1 2018 High pressure will move off the coast today.
1057 AM EDT Sun Apr 1 2018 Weak high pressure will bring a cool Easter Sunday to the region.
1035 AM MDT Sun Apr 1 2018 A broad trough covers the CONUS, with northwest flow over the northern plains. At the surface, high pressure rests over SD. Weak ridging will develop over the region today, as an upper low pushes into the Pacific Northwest. Pac NW upper low will become an open wave Monday as it crosses the northern Rockies.
A fast moving cold front will cross northern and central Utah Monday, with mild temperatures returning by midweek. An upper low currently spinning along the British Columbia coastline is forecast to dig southeast into the northern Rockies region Monday. The associated cold front will push into northern Utah Monday morning, before surging southeast through the remainder of the forecast area Monday afternoon and evening. Much colder air will quickly spill into the region behind this boundary will drop temperatures below freezing across most locations Monday night, with the exception of far southern Utah.