Aikyam-Lab/Synoptic-Bench huggingface dataset:
A cold front extends from the Canadian Maritime Provinces to Pennsylvania to northern Mississippi and Alabama into northeast Texas. At upper levels, a longwave trough continues over the eastern quarter of the country. Cold front really losing definition as it moves into the area, other than winds getting reinforced from the north.
243 PM CST Sat Nov 25 2017 240 PM CST Quiet weather continues in the short term with high pressure ridging to move over tonight. While 925mb temperatures warm about 3C more than today, the starting point in the morning will be cooler than today.
155 PM CST Sat Nov 25 2017 Upper ridge centered over Baja extends into the region while a broad trough remains over the Eastern US.
158 PM MST Sat Nov 25 2017 Current surface map shows high pressure across the eastern Dakotas into the central plains. Upper level ridge builds across the area tonight and Sunday. Warm front lifts through western South Dakota Sunday afternoon with highs around 10F warmer than today.
Hence temperatures will begin to level off later tonight in the lower to middle 20s. Breezy southwest winds will carry warmer air into the area during the day as 925H temps warm to 5-7C. Could even be a little warmer if cirrus clouds do not increase as expected.
1032 AM MST Sat Nov 25 2017 A ridge of high pressure will build over the region today and linger over the area into Sunday. As a result, expect dry weather and much warmer than normal daytime temperatures this weekend. Skies will be partly sunny/partly cloudy as cirrus continues to move through the ridge over the next 36 hours. Prominent ridging over the area now will translate eastward as southwest flow aloft takes over to start the period.
225 PM EST Sat Nov 25 2017 A weak cold front is moving through the area with some sprinkles across the state and mid to high level clouds. Broad trough over the eastern states transitions to southwest flow aloft by mid week ahead of the next upper short wave.
251 PM EST Sat Nov 25 2017 A cold front sweeps across the region tonight followed by blustery and colder weather Sunday.
1237 PM EST Sat Nov 25 2017 Milder air returns today ahead of a cold front, which will bring scattered showers as it crosses the region tonight.
128 PM CST Sat Nov 25 2017 A Northwest wind will continue today into tonight in the cyclonic flow behind the trof over the eastern U. High pressure over the central plains will move southeast overnight and Sunday and will be centered over central Arkansas by midday Sunday.
1220 PM EST Sat Nov 25 2017 A cold front over Indiana will move across the local area by midday.
Overnight temperatures will be a bit warmer than last night at most locales as the airmass moderates and warms. Upper ridge axis moves overhead with unusually high 500 mb heights near 5780 meters. With a dry airmass, minimal cloud cover and warmer than normal airmass, maximum temperatures expected to soar into the 60s to lower 70s at lower elevations, with near record high temperatures at most locations.
259 PM EST Sat Nov 25 2017 A cold front crosses the area tonight.
335 PM CST Sat Nov 25 2017 Northeasterly winds gradually spread across North Texas today behind a weak cold front.
Temps ahead of the snow will be above freezing but will fall to or just below freezing as the snow moves in. Snow rates of 1-2 inch per hour psbl in this area where snow totals of 8 or more has the highest chance of occurring. Snow will taper off western fcst area after midnight Friday night and could be replaced by some freezing drizzle as low level moisture remains but main seeding clouds move out.
349 PM CDT Thu Mar 22 2018 This afternoon's surface analysis indicates that the area of high pressure located over NW Oklahoma yesterday is now centered over the Mississippi River Valley and strengthened to 1030 hPa.
/issued 1026 AM EDT Thu Mar 22 2018/ High pressure in place across the region as dry air continues to filter in from the north. Temperatures today will be in the 70s with a cooler night tonight across South Florida.
321 PM CDT Thu Mar 22 2018 Surface and upper level ridging will cover the forecast area tonight and Friday.
and Friday Persistent Hudson Bay high pressure will keep clear to partly cloudy skies over the region through Friday. Mixing through about 850 mb should support highs in the upper 30s to middle 40s, with slightly cooler readings near Lake Michigan as east to northeast winds increase on Friday. Lows tonight are tough, as there are large discrepancies between the cooler MET and milder MAV.
High pressure building in from the nw will continue the dry and cool pattern. A light breeze will persist at the coast tonight with temperatures bottoming out in the lower 40s. Temperatures will be still be below average with readings in the lower 60s coast and 65-70 inland.
Did go on the low end of guidance yet again tonight for overnight lows with temps dropping into the single digits across much of the west and central. Elsewhere, temperatures will still be chilly and drop into the lower teens. The dry weather is expected to persist on Friday, but cloud cover will increase a bit with slightly cooler temperatures compared to today.
334 PM EDT Thu Mar 22 2018 Dry, but cool weather conditions continue today with a high pressure in control. The cool north winds off the waters of Lake Huron will hold the temperatures across the Thumb in the 30s, while the rest of the area will reach into the low to mid 40s. A vorticity max will drop down through the Great Lakes tonight with an associated weak cold front. High pressure will strengthen through tomorrow with center of the high located north of Lake Superior. The mid/upper level ridge will drift slightly to the east towards the western Great Lakes. A more pronounced northeast flow will again keep temperatures several degrees cooler across the Thumb.
The high will hold over Ontario through Friday before likely strengthening this weekend while drifting eastward over Quebec.
323 PM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
The threat of precipitation will ease from west to east late this afternoon and evening as a very strong cold front plows through. The air mass behind the cold front will be considerably colder and unsettled with a chance of rain and snow showers each day through the weekend. This round will come in with an area of low pressure migrating north ahead the approaching cold front. That cold front will begin to push east across the region through the afternoon too, leading to an additional impetus for lift and precipitation. Precipitation should come to an end somewhat rapidly from the west between 7 and 10 pm as the cold front shifts east. Cote' 18Z TAFs: A cold front will be sliding through the area today, with a variety of potential weather impacts including showers and maybe a few thunderstorms.
640 PM EDT Thu Mar 22 2018 High pressure and a dry, cool airmass will remain across the region tonight through Friday.
207 PM MDT Thu Mar 22 2018 Water vapor shows upper ridge over the Rockies with large trof over the far western CONUS. Upper ridge axis will move into the plains overnight as large trof west coast trof advances eastward. While some of the pcpn could fall as light freezing rain across northwest SD, the amount of warm advection should keep the pcpn elsewhere in the form of rain.
A cold front is moving across the region this evening, and will cause some strong winds, rain, and snow. Due to the warm temperatures today and many locations only briefly freezing last night, if they froze at all, it will be hard for snow to accumulate on the roads as they will likely melt the snow as it falls.
344 PM CDT Thu Mar 22 2018 Mid level ridge axis will move off to the east on Friday, with southwest flow aloft developing in advance of a upper level trough developing along the West Coast. Dry conditions continue this weekend, with slightly cooler temperatures.
Dry northwesterly winds continue as a large area of high pressure continues to dominate northern Michigan's weather. An upper level low over southeastern Ontario and associated moisture will move southeastward tonight through the early morning hours of Friday before high pressure and much drier air builds back into the Great Lakes region throughout the day Friday. Models are differing in cloud cover tonight with aforementioned upper low and attendant moisture.
As this wave proceeds eastward, models indicate a chance of freezing rain across north central zones, including Musselshell, Hysham, and eastern Yellowstone Counties in the early morning hours Friday. As the warm front shifts eastward overnight, there is also a chance for freezing rain in southeast Montana, including Carter and eastern Powder River Counties.
549 PM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
Snow levels will begin lowering today with significant accumulations at the higher elevations into the weekend.
135 PM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
The area will remain cooler than normal through the weekend.
High The influence of the dry and cool high pressure system will extend into Friday. Trended towards the cooler guidance numbers for tonight.
Otherwise, remainder of forecast continues to be on track with the highlight continuing to be the snow late tonight into Friday. At the upper levels, a ridge will progress towards western North Dakota through the afternoon, with the axis translating across the state overnight, transitioning the forecast area into a southwest flow regime.
237 PM EDT Thu Mar 22 2018 High pressure in place tonight and exiting Friday. Another low pressure system this weekend. Have hemmed and hawed about removing the flurry potential in the highest ridges of the northeast mountains for the rest of today given the moisture depth issues, but have left them in for a few more hours with the stubborn stratocu over that area. No real chances for temperature recovery from the cold week going into Friday, but there will be modest increases with some of the lowland areas topping the 50 degree mark.
246 PM EDT Thu Mar 22 2018 An approaching pressure ridge will extend through the forecast area tonight.
Lows tonight will be in the lower to middle 20s and highs on Friday will generally be in the middle to upper 40s.
Water vapor analysis depicts a potent Pacific trough with southwest flow over the Great Basin and into the northern Rockies. The downstream upper level ridge axis was centered over the eastern Rockies into eastern Montana and through the western Canadian prairies. Would expect at least areas of fog to continue tonight as the upper ridge axis shifts over the state. Forecast soundings in this area depict a temperature profile near freezing for much of the event which will A) create lower snow ratios and B) potentially create an area of more liquid precipitation which would drastically cut down snow accumulation totals on the southwest edge of the band of snow. As this wave meanders off to the east, a loss of ice growth aloft will lead to a threat of freezing drizzle on the back end Friday night.
137 PM EDT Thu Mar 22 2018 High pressure slowly builds in today and tonight. Another low pressure system this weekend. A northwest wind flow will persist today, although moisture in the lower atmosphere will be rather limited. A high pressure system will then briefly move over the area tonight.
425 PM EDT Thu Mar 22 2018 High pressure in place tonight and exiting Friday. Another low pressure system this weekend. Have hemmed and hawed about removing the flurry potential in the highest ridges of the northeast mountains for the rest of today given the moisture depth issues, but have left them in for a few more hours with the stubborn stratocu over that area. No real chances for temperature recovery from the cold week going into Friday, but there will be modest increases with some of the lowland areas topping the 50 degree mark.
258 PM CDT Thu Mar 22 2018 20F plus dew point depressions underneath ample mid clouds advecting across the FA in nwly flow overtop developing warm front/surface boundary. As Plains energy spills in, resuring warm front will further warm/moisten and ultimately destabilize the column.
321 PM CDT Thu Mar 22 2018 High pressure, for the most part, will remain in control overnight. Min temps will drop below freezing in our northern Plateau. Elsewhere, temps should hold to just above freezing. A warm front will begin to lift northward during the day.
443 PM EDT Thu Mar 22 2018 Low pressure over Nova Scotia will track toward Newfoundland tonight through Friday.
As the upper level amplified trough approaches today, temperatures should be considerably warmer than yesterday. A significant inversion in the lowest levels with a pronounced dry layer lends more to drizzle. It looks clearly warm enough to not have to worry about freezing drizzle. As low pressure intensifies to the west, sustained speeds Friday morning will increase to around 15kt with gust potential 20-25kt.
The warming trend will continue today as the upper level ridge continues to amplify through the afternoon. This ridge will eventually shift eastward into the plains resulting in southwest flow aloft ahead of the next Pacific storm moving onshore today. Do not expect any thunder showers to form due to the warmer air aloft and midlevel subsidence. Models indicate another warm day on Friday, but it should be slightly cooler compared to Thursday due to expected cloud cover and windy conditions. This will bring in some cooler air aloft and help with instability, so added a 20 pct chance of thunder with the best chances along the Interstate 80 corridor. Otherwise, expect the upper level ridge to build over the area Friday night with a decreasing chance for precipitation and clearing skies.
SHORT TERM (Tonight through Friday Night): A mix of sun and clouds across the lower valley this afternoon has helped warm much of the area up into the middle and upper 80s. Winds have increased a bit with the increase in pressure gradient at the surface between trough out west and ridging out east. A warming trend will continue at the surface as high pressure aloft sits over northern Mexico throughout the short term period. This will promote warmer surface temperatures away from the cooler sea surface temperatures.
143 PM EDT Thu Mar 22 2018 An approaching pressure ridge will extend through the forecast area tonight.
342 PM EDT Thu Mar 22 2018 High pressure and a dry, cool airmass will remain across the region tonight through Friday.
A Pacific cold front in eastern Oregon this afteroon will reach the OR/ID border about 5 PM PDT (6 PM MDT), then continue across western Idaho between 6 PM and 11 PM MDT.
432 PM EDT Thu Mar 22 2018 A ridge of high pressure will bring dry weather to region tonight, along with light north winds and cold overnight lows in the mid 20s. This ridge will move off to the east Friday and Friday night as a storm system takes shape across the Central Plains.
Despite the veil of high clouds, temperatures in some areas have already reached the lower/mid 40s, particularly across portions of the mid Hudson Valley, and also across SE VT. Have raised max temps in aforementioned areas into the mid/upper 40s, with lower/mid 40s expected in most valley areas, although may remain slightly cooler across portions of the Mohawk Valley. In the wake of the departing coastal storm northern stream short waves will maintain a trough over the Northeastern United States. While at the surface, high pressure from over Hudson Bay will drift southeastward across eastern Canada while building southward across the region.
233 PM PDT Thu Mar 22 2018 A weakening low pressure trough will interact with remnants of the tropical moisture plume this evening to produce widespread showers.
Perhaps KTRI will hold on to a slight southwesterly wind as weak high pressure is centered back over the central TN valley overnight.
111 PM EDT Thu Mar 22 2018 High pressure and a dry, cool airmass will build across the region today through Friday.
309 PM EDT Thu Mar 22 2018 Benign fcst period on tap with ridge-dominated regime under NW flow. Temps should stay above freezing tomorrow morning for areas aside from the NE mtns.
/issued 1047 AM CDT Thu Mar 22 2018/ High pressure at the sfc has begun to slide ewd today, allowing for sly winds to return across much of the region.
Winds overnight and tomorrow will be much lighter as high pressure moves into the region. The upper level trough axis will edge eastward today with the area in deep-layer northwesterly flow.
An approaching low pressure system will bring gusty southwest winds and areas of rain today through midday Friday. A few light showers and areas of drizzle are falling across far north and northwest Coconino County this afternoon - a weak reflection of the southern edge of the moist atmospheric river and longwave trough impacting southern California. With the trough in the area, winds have also been quite strong, with gusts currently over 30 mph along and north of the I-40 corridor. The trough and associated cold front will continue to move across northern Arizona tonight, with rain generally increasing from northwest to southeast across the area.
Models remain in good agreement with upper level ridging shifting to the east of the region early Friday being replaced by southwesterly mid to upper flow as an upper level trough dives down the West Coast into the desert southwest. Friday still looks to be the warmest day with record warmth likely and the possibility for wind advisory level wind speeds across the northwestern zones in response to a low amplitude short wave trough translating across the Rockies.
250 PM MDT Thu Mar 22 2018 Clouds gradually spreading east across the CWA this afternoon as an upper ridge axis is also moving east over the plains. Some snow will fall over the mtns but amounts not looking as great as earlier with the best accumulations, about 3-6 inches, over the higher peaks. Clearing out Friday night with upper ridging rebuilding over the area.
156 PM EDT Thu May 11 2017 Low pressure will move across south-central Ohio today bringing rain showers to much of the state through the morning hours.
1143 AM MDT Thu May 11 2017 Widespread precipitation has just about come to an end as high pressure has started building in from the west. A few showers are possible this afternoon over the highest terrain along the Continental Divide, eastern Uintahs, and San Juans but coverage and intensity of any precipitation will be much less than seen lately. While we likely won't see any precipitation from this system, it will shift the ridge of high pressure to the east causing winds to become more southwesterly warming things up a bit. Even at that, QPF amounts are on the low side. By Friday evening, the ridge of high pressure will continue sliding to the east as a trough digs into the Pacific northwest.
145 PM CDT Thu May 11 2017 The upper low that has been a big part of our forecast for the last several days is moving eastward across western Oklahoma. A few showers and thunderstorms on the backside of the low are moving southeastward across the eastern Panhandle and could clip the northeastern zones this afternoon; however, we should be all clear by 00Z. Cooler air is already filtering in behind the low with low level cold advection expected to persist into Friday.
General trend of an initially digging, closed upper low approaching the lower Mississippi Valley overnight, then opening up and sweeping into the lower Mississippi Valley Friday before moving into the deep south Friday night continues in the medium range models.
High pressure aloft will settle across the Great Basin today.
225 PM CDT Thu May 11 2017 Cold front has now pushed to around the I-64 corridor, and heavier showers and a few thunderstorms have exited the far southeast CWA. Currently looking light tonight and Friday will largely be dry over the forecast area, although areas from Flora to Olney may be clipped toward sunrise with a few more showers, as the upper low currently over the Oklahoma panhandle tracks eastward. With a cloudier start, temperatures in the southeast will be a bit cooler, but all of the forecast area should reach the lower 70s. A ridge of high pressure aloft will slowly edge eastward through the weekend, then begin to amplify over the Mississippi Valley as a trough digs southward across the far western CONUS.
324 PM EDT Thu May 11 2017 Rest of Today and Tonight: High pressure continues to dominate across South Florida with dry conditions and warm temperatures with highs today around 90 degrees.
Robust dew points in the lower 70s and diminishing winds will support at least light fog development overnight and near dawn, especially near the coast, so included a mention of it in the forecast. The arrival of a weak cold front is anticipated Friday during the day, with an influx of drier air behind it.
The upper level ridge will linger another partial day, bringing warm temperatures once again mainly to eastern zones where the clouds will not increase as much.
A few rain showers and an embedded thunderstorm or two may linger across central and south central Kansas this evening as a closed upper low shifts eastward across extreme northern Oklahoma early in the period. Otherwise, drier condtions will take hold later tonight and continue through late Friday afternoon as short range models indicate the closed low turning and dipping southeast into the Ark-La-Tex Region, giving way to a weakening northerly flow aloft while drier air in the lower levels filters southward into the high plains. Clearing skies should allow highs to climb into the lower to mid 70s(F) by mid to late afternoon.
Lingering showers on the back side of the upper low will continue through the afternoon before ending this evening.
233 PM EDT Thu May 11 2017 Current conditions across the area feature the main threat across eastern Kentucky being a moist and unstable air mass setting up over Kentucky ahead of a slowly inching south cold front. Any training activity this evening will leave a saturated boundary layer with additional rain moving in on Friday as the low out west lifts northeast bringing through a second cold front and increased shower and thunderstorm activity.
Upper ridging holds tonight into tomorrow, making for warm temperatures and mostly clear skies.
An upper level trough will move east across the Central/Southern Plains dragging the dryline a little further east this evening, before a cold front overtakes it during the overnight hours. The best moisture, instability and dynamics will be this afternoon into evening resulting in the highest POPs. For Friday into Friday night, ridging at the surface and aloft builds into our area as the upper level trough moves away. A drier airmass results in cooler nights, though minimal cold advection allows for near normal daytime temperatures.
The upper level ridge that that has been the dominant feature of late has been knocked down and pushed off to the east. The actual upper level low and associated trof, currently over the TX/OK panhandles, will move slowly southeast with time and cross over the forecast area through the period. In advance of the upper system, a line of thunderstorms is expected to develop during the mid to late afternoon along the associated cold front. The precipitation chances will decrease from NW to SE during the day as the system finally departs and high pressure begins to build back in.
Hard to say whether the dryline will make it into our are before being caught by the cold front, but regardless, ongoing convection continues to increase in coverage and intensity. Models still show a fair amount of post-frontal rainfall as the upper low moves sewd across AR.
137 PM EDT Thu May 11 2017 The upper ridge over the region will begin breaking down tonight as low pressure crosses the Lower MS River Valley and into the Carolinas Friday night.