Aikyam-Lab/Synoptic-Bench huggingface dataset:
629 AM CDT Fri Apr 30 2021 Main change for morning update was an increase in cloud cover over western and southern locations as clouds continue to stream over upper ridge. Trough/warm front stretches to the southeast along the lee of the Canadian Rockies into eastern Montana. Upper level analysis places ridge stretching from the Great Basin into the Northern Rockies. Quiet weather remains over our area with some mid to upper level clouds sliding down the front of the ridge. Aforementioned ridge broadens out while at the surface aforementioned warm front lifts through the area. A bit cooler temperatures are expected Saturday over western locations as thermal ridge shifts east, but some locations may still nudge 80 degrees.
Overall, temperatures will trend cooler today, with afternoon highs only climbing into the upper 50s to lower 60s across Western Washington.
146 PM MDT Fri Apr 30 2021 Elongated upper ridge currently centered over the western US as a cut off low continues to sit over the SW US/northern Mexico, cut off from the prevailing flow. Warm air advection continues in earnest today as a thermal ridge will is centered over the forecast area this afternoon. Upper trough axis centered just off the Pacific NW coast will pivot through the region late Saturday.
239 PM CDT Fri Apr 30 2021 High pressure overhead will keep light winds and plenty of sunshine overhead for the remainder of the day. Lows will bottom out in the low to mid 50s.
1130 AM MDT Fri Apr 30 2021 High pressure continues to dominate the western portion of the CONUS with low pressure off to the east over the Mid-Atlantic. Sunny skies and warm temperatures are expected to continue across the CWA as the region remains under an upper level ridge. Daytime highs for today are in the high 70s and 80s with continued warming into the 80s by Saturday. Today's afternoon humidities will fall into the low to mid teens and some elevated winds across Carbon and Albany Counties. Saturday afternoon should start to see some changes with the threat of thunderstorm activity Saturday evening with the preliminary cold front, tapering off into rain showers overnight.
1243 PM CDT Fri Apr 30 2021 Increased sky cover through the afternoon across the CWA as the high clouds streaming in from the northwest refuse to dissipate. Main change for morning update was an increase in cloud cover over western and southern locations as clouds continue to stream over upper ridge. Trough/warm front stretches to the southeast along the lee of the Canadian Rockies into eastern Montana. Upper level analysis places ridge stretching from the Great Basin into the Northern Rockies. Quiet weather remains over our area with some mid to upper level clouds sliding down the front of the ridge. Aforementioned ridge broadens out while at the surface aforementioned warm front lifts through the area. A bit cooler temperatures are expected Saturday over western locations as thermal ridge shifts east, but some locations may still nudge 80 degrees.
A cold front is pushing southward into coastal portions of the forecast area early this afternoon, and extends roughly along a Mobile to Crestview line as of 1 PM. The cold front will push well offshore tonight, with light northerly to northeasterly surface flow across our forecast area. A cooler and slightly drier airmass will filter into the region tonight. Highs Saturday afternoon will range in the lower to mid 80s inland and around 80 near the immediate coast. Scattered SHRA and isolated TSRA have developed across coastal portions of the area early this afternoon along and ahead of a cold front.
227 PM MDT Fri Apr 30 2021 Broad & flat upper-level ridging will continue to support warm and dry conditions across the majority of the area early in the period with many areas reaching 80 deg F this afternoon. Daytime highs on Saturday will be quite warm once again, before ridging breaks down and upper-level difluence overspreads the central Rockies ahead of the next short wave trough.
A trough will move through to the north this weekend, bringing increased onshore flow, marine layer clouds, and cooler temperatures.
An upper level short wave located over Oklahoma and eastern Texas will progress NE towards our area as a northern stream trough continues to progress toward the central CONUS.
On the large synoptic scale today, a positive-tilted upper level ridge extended from California northeast across the Northern and Central Rockies while a cutoff upper low continued to spin across northern Mexico. Another broader longwave trough was situated across the Great Lakes region into the Ohio Valley. On Saturday, the leeside trough will deepen as the upstream positive- tilted ridge breaks down owing to increased west-southwest momentum in the middle troposphere across the higher terrain of northern Colorado and Wyoming. The increasing low level thickness and 850mb temperatures will result in a warming 2- meter temperatures as well, so we are anticipating afternoon highs topping out in the mid to upper 80s -- warmest out across far west central Kansas closer to the higher low level thicknesses and farther removed from the cooler airmass associated with the Mexico- South Texas upper low.
250 PM EDT Fri Apr 30 2021 A narrow high pressure area will build across the Commonwealth later tonight and Saturday, to bring dry weather and diminishing winds.
/JNE/ Today will be a gloomy day as lingering showers behind a slow moving cold front continues to settle in.
(This evening through Saturday) Water vapor satellite imagery is showing a stationary upper level low across northern Mexico, with southerly flow aloft over our region. Tonight through Saturday, the low will move northeast into West Central Texas, bringing increasing moisture and lift, with precipitable water values up to 1. (Saturday night through next Friday) By Saturday night, the aforementioned upper level low will be pivoting across our southeastern counties.
(This evening through Saturday) As the upper low swings around through central Texas, showers and a few storms should gradually increase across north Texas into southern Oklahoma tonight.
Dry conditions will persist through Saturday as high pressure builds to our north.
Saturday will be another warm, breezy, and dry day as the upper- level ridge lingers over the northern CONUS; however, conditions will not be quite as extreme as they are today. Sky cover is also expected to increase throughout the day as the ridge axis moves east, which will work to limit boundary layer mixing and how warm temperatures can get.
High pressure aloft continues to break down this afternoon in advance of a cold front, which will begin to move through northwest Montana and central Idaho tonight. As the cold front moves through tonight, shower activity will increase, particularly through central Idaho. Wind and clouds with the cold front will make for a relatively mild night. The cold front will shift south and east through the rest of western Montana on Saturday morning. Temperatures will run 5-10 degrees cooler than today.
127 PM EDT Fri Apr 30 2021 A secondary front moves across this evening, then high pressure builds across for the weekend. Some of the higher ridges of the Alleghanys and Blue Ridge north of Roanoke could see gusts over 55 mph, but too isolated for high wind warning. Winds will start to lessen late tonight as high pressure works in from the west. High pressure works southeast Saturday with plenty of sunshine expected.
239 PM EDT Fri Apr 30 2021 Despite overnight lows in the low to mid 30s, any frost should remain limited and of short duration. The gusty NW winds will quickly diminish after sunset as high pressure quickly shifts east across the area. Lows still look destined to drop into the low to mid 30s for most areas (far west excluded) but lots of dry air in place to likely limit frost potential. Thermal profiles show the WAA will be well underway already by 12Z Sat and further strengthening with highs easily 15 to 20 degrees or more warmer on Saturday.
Near record or record high temperatures this afternoon will not linger as the current upper level ridge breaks down overnight and showers and thunderstorms develop for Sat afternoon. As the trough approaches, the wind and cloudiness increase, and a Lake Wind Advisory is possible for the late afternoon to early evening. Continued cloudiness as the upper level trough passes through for Sun/Sun night is extensive enough to keep conditions more stable with less thunderstorm potential, but precipitation threat does spread farther southward for Sun during the day, with partial clearing in the west on Sun night.
This is due to nearby high pressure ridge settling into the Southeast States by sunset Saturday. Seasonably cool temperatures are expected tonight, with lows in the lower 40s in eastern IL overnight, and upper 40s to around 50 degrees in west central IL. Warmer this weekend with highs in the upper 70s and lower 80s.
415 PM EDT Fri Apr 30 2021 Cold front pushes through the region overnight, with rain and snow showers coming to an end towards early Saturday morning.
Precipitation will largely be east of the ridges by early evening. Advisory level winds expected in the ridges where latest soundings continue to indicate deeper mixing and stronger winds within the BL. Bufkit mean momentum transfer values by mid afternoon show values in the ridges that would typically translate to gusts between 45 and 50mph, therefore, the wind advisory remains in effect. Winds and cloud coverage will diminish this evening and allow for temperatures to drop to near or below freezing overnight. Dry weather is then expected through the weekend with a warming trend in temperature as ridging amplifies over the region.
The transitory mid-level ridge to our southwest will shift eastward across the region on Saturday, with mostly sunny skies and the onset of very light southeasterly return flow promoting high temperatures in the u70s-l80s.
High pressure aloft continues to break down this afternoon in advance of a cold front, which will begin to move through northwest Montana and central Idaho tonight. As the cold front moves through tonight, shower activity will increase, particularly through central Idaho. Wind and clouds with the cold front will make fore a relatively mild night. The cold front will shift south and east through the rest of western Montana on Saturday morning. Temperatures will run 5-10 degrees cooler than today.
Sfc temps have increased comfortably into the low 70s so far, and should rise a few more degrees though the afternoon.
236 PM EDT Fri Apr 30 2021 Deep-layer ridging persists across Central America and the Gulf of Mexico. Temperatures range from 84 to 89 degrees, with dewpoints in the lower to mid 70s. Mean layer ridging will remain in control for the next five days or so.
248 PM EDT Fri Apr 30 2021 Cooler and drier air will continue to settle across the area tonight.
TFJ Flat upper ridge will be moving across the region today as a trof approaches the Pacific Northwest. Alberta lee low developing and will move east today, lifting a warm front across the region. A back door cold front trailing behind the low will provide enough mixing to bring the winds up again on Saturday. Overall conditions will not be as extreme as today, with cooler temperatures and slightly higher humidity, but could still support elevated fire weather conditions in the afternoon.
908 AM MDT Fri Apr 30 2021 Satellite imagery this morning shows plenty of mid and high clouds as upper level ridge over the region becomes flattened in response to energy moving into western Canada. JKL Upper ridge over the area will get flattened out today. Therefore, temperatures will be cooler on Saturday but still warm enough to register above normal temperatures yet again, just not nearly as warm as today.
217 PM EDT Fri Apr 30 2021 Cooler and drier air will continue to settle across the area tonight.
Rain showers ahead of a warm front across North and South Dakota are forecast to slowly propagate first across northeast Minnesota this evening in a zone of low level warm air advection. There is some uncertainty how much high level cloud cover there may be, which would filter some of the sunshine and possibly keep temperatures a few decreases cooler and relative humidity slightly higher.
306 PM EDT Fri Apr 30 2021 High pressure moves overhead tonight leading to cold, frosty conditions for Saturday morning. High pressure quickly moves south of the Ohio Valley on Saturday allowing southerly flow to develop and moderating temperatures through the weekend.
1247 PM CDT Fri Apr 30 2021 (Today and tonight) Latest water vapor satellite imagery shows the cutoff upper low nearly stationary over northern Mexico. Little movement is expected with this system today but by tonight the upper low will begin to slowly lift northeast towards the area, and is progged to be near the Big Bend region by early Saturday morning. Rain chances will increase areawide tonight, especially after midnight, as lift increases with the approaching upper low.
Temperatures have still been very slow to rise with the cloud cover today, so the high for the day may not actually occur until early evening. Saturday looks to be warmer with a little more moisture, but with those parameters, minimum humidity levels look to be in the 20s again.
But, since this is Wyoming, the weather can change fast, and that will be the case starting Saturday as the ridge gets thoroughly pushed over by the next approaching trough and cold front. The leading edge of the trough and best diffluence aloft moves across the state during the day Saturday, bringing good midlevel lifting.
High pressure was continuing to filter into the region overnight which will help bring a rather nice day for the area. For tonight, high pressure will be nearly overhead as clear skies continue. Saturday will be a near carbon copy of Friday though temperatures may be a degree or two warmer. Southerly winds will increase through the day as the area of high pressure moves south of the Ozarks and the surface pressure gradient begins to tighten.
1126 AM MDT Fri Apr 30 2021 A broad upper ridge sits over the western CONUS, with northwest flow over the northern plains. At the surface, a trough is over MT, and winds across the CWA are light and variable. Upper ridge axis will cross the central states Saturday, while an incoming Pac NW trough begins to flatten the ridge. Another warm day is expected Saturday (especially across central and southern SD), but cooler air will begin advecting into the region. Saturday evening, a period of unsettled weather will begin as the trough shifts eastward.
117 PM EDT Fri Apr 30 2021 [Through 18Z Saturday] A cold front moving south through the area today will shift the winds northerly and bring in drier air behind the front, leading to VFR cigs for the evening through the end of the TAF period tomorrow. A weak cold front is now moving south past Montgomery and Columbus GA.
241 PM EDT Fri Apr 30 2021 A weak reinforcing backdoor cold front will drop across the area early Saturday.
The presence of this high, along with the ridging aloft, will bring generally clear skies tonight through Saturday. With the high moving east Saturday, winds will become more southwesterly.
H5 trough over New England has us in a dry NW flow presently. This trough will move into the Atlantic and H5 high pressure will build in from the west Saturday. At the surface, high pressure will dominate. Low temps tonight up north and in the higher elevations will flirt with the mid to upper 30s with maybe a light lingering wind. Offices to our north and in the higher elevations have issued a frost advisory, but offices to our east are holding off, and we will continue to hold off as well. Temperatures will be warmer overnight as high clouds begin to increase and a light southerly flow develops.
First of two cold fronts will pass through late tonight, and Saturday will be about 15 degrees cooler, along with gusty west-northwest winds in the afternoon.
High pressure will continue over much of the area today. Today Through Saturday Night Upper low pressure is over northern Mexico with an upper trough along the east coast. The upper low will remain stationary today then slowly move east Saturday afternoon. The high then moves east of the area Saturday.
228 PM EDT Fri Apr 30 2021 A secondary front moves across this evening, then high pressure builds across for the weekend. Some of the higher ridges of the Alleghanys and Blue Ridge north of Roanoke could see gusts over 55 mph, but too isolated for high wind warning. Winds will start to lessen late tonight as high pressure works in from the west. High pressure works southeast Saturday with plenty of sunshine expected. High Pressure Transitions To Unsettled Weather.
142 PM CDT Fri Apr 30 2021 Showers developing across the Permian Basin and Concho Valley will begin to move northward toward the southern sections of the forecast area this afternoon and evening as the persistent and nearly- stationary upper low over Chihuahua begins to rotate to the east- northeast across Coahuila on Saturday and central Texas on Saturday night. Precipitation will favor southern zones tonight and southeastern on Saturday following the movement of the upper low and its associated lift. Persistent showers and cloud cover southeast will result in the coolest high temperatures there on Saturday while northwestern zones where skies will be clearing will run about 10 degrees warmer than the cooler southeast.
Split flow pattern will dominate the region for the next 24-36 hours, with a closed low currently located over the Rio Grand valley with weak ridging north of the low across the Rockies. Not expecting the upper low to move much for the next 24 hours, with upper ridging expected across the plains with nice downslope flow with max temperatures climbing above normal and increasing breezy conditions for the weekend. As saturday progresses, both the NAM/WRF and GFS are similar in the upper low in nrn Mexico, moving east/northeast across southern TX into ern TX by Sat evening.
The cooler and drier northwesterly flow behind the cold front has furthermore moderated temperatures to near seasonal normals, and highs are expected to range from the mid 70s in the far northern tier to the mid 80s in east-central Georgia this afternoon. Overnight temperatures will similarly be near normal, mainly in the upper 40s and 50s (and mid 40s in the higher elevations in far north Georgia).
257 PM MDT Fri Apr 30 2021 Satellite imagery shows flat ridging over the area with much less high cloudiness than we saw this morning, as expected. As a result of the clearing and well-mixed westerly winds, temps have risen into the low-mid 80s most places. Weak cold front will move thru the area tonight, and while not producing much wind it will yield a somewhat cooler day on Saturday with highs "only" in the 70s. Best t-storm potential will be south of the Musselshell River and west of Broadus, and in this area could be pockets of heavier rain and perhaps small hail (especially as freezing levels begin to fall). The more north and east you move off the terrain, the lower the chances and amounts of precipitation become. Temperatures will be cooler but not far from seasonal.
Quiet conditions will continue into Saturday as mid-level ridging comes into play keeping us rain free but partly cloudy skies will still prevail. Warm temperatures will ease back into the region Saturday with highs ranging from the low 80s to upper 70s across the ArkLaMiss.
Tonight, winds will be fairly light and variable, but as the high begins to shift east of the region on Saturday, winds will veer around to the southwest. The pressure gradient across the region will tighten a bit tomorrow as weak low pressure deepens over the northern Great Lakes, resulting in breezy southwest winds by late tomorrow morning.
1233 PM CDT Fri Apr 30 2021 A secondary cold front moved quickly through the region overnight, shifting winds northwesterly and advecting another shot of cool, dry air into the region.
High pressure will bring well above normal temperature to the area again on Saturday.
907 PM EDT Fri Apr 30 2021 A narrow high pressure area will build across the Commonwealth later tonight and Saturday, to bring dry weather and diminishing winds.
735 PM EDT Fri Apr 30 2021 Cooler and drier air will continue to settle across the area tonight.
1048 PM EDT Fri Apr 30 2021 A weak reinforcing backdoor cold front will drop across the area early Saturday.
746 PM EDT Fri Apr 30 2021 Despite overnight lows in the lower to middle 30s, any frost should remain limited and of short duration.
936 PM EDT Fri Apr 30 2021 High pressure moves overhead tonight leading to cold, frosty conditions for Saturday morning. High pressure quickly moves south of the Ohio Valley on Saturday allowing southerly flow to develop and moderating temperatures through the weekend.
Weak upper level troughing across the region will keep conditions showery through Saturday, especially within the vicinity of the Puget Sound Convergence Zone.
646 PM CDT Fri Apr 30 2021 (This evening through Saturday) As the upper low swings around through central Texas, showers and a few storms should gradually increase across north Texas into southern Oklahoma tonight.
There is a chance for an afternoon shower at KMLC closer to the upper low over TX.
701 PM CDT Fri Apr 30 2021 (This evening through Saturday) Water vapor satellite imagery is showing a stationary upper level low across northern Mexico, with southerly flow aloft over our region. Tonight through Saturday, the low will move northeast into West Central Texas, bringing increasing moisture and lift, with precipitable water values up to 1. (Saturday night through next Friday) By Saturday night, the aforementioned upper level low will be pivoting across our southeastern counties.
Freeze and frost conditions are expected tonight before dry and warmer weather this weekend. More widespread and moderate showers have largely shifted east of the area late this afternoon save for continued rain across the WV ridges. Will likely let the wind advisory for the ridges ride for a couple more hours before canceling as winds diminish. Decreasing wind speeds and clearing sky this evening will allow temperatures to drop to near or below freezing overnight. A Freeze Warning continues north of Pittsburgh and across the ridges where temperatures below 32F are expected. Dry weather is then expected through the weekend with a warming trend in temperature as ridging amplifies over the region.
As the night progress, the upper level low pressure system over Mexico will continue to push to the east while adding more fuel to the storms already affecting the area and offering new opportunity for storms to develop.
622 PM EDT Fri Apr 30 2021 A narrow high pressure area will build across the Commonwealth later tonight and Saturday, to bring dry weather and diminishing winds.
806 PM CDT Fri Apr 30 2021 Fair and dry weather is expected through Saturday night due to nearby high pressure settling into the Southeast States by sunset Saturday. Seasonably cool temperatures are expected tonight, with lows in the lower 40s in eastern IL, and upper 40s to around 50 degrees in west central IL.
807 PM EDT Fri Apr 30 2021 A weak reinforcing backdoor cold front will drop across the area early Saturday.
705 PM CDT Fri Apr 30 2021 Updated for 00Z aviation discussion 00Z TAF discussion: VFR conditions expected in the overnight with light and somewhat variable winds expected under the ridge axis. Quiet conditions will continue into Saturday as mid-level ridging comes into play keeping us rain free but partly cloudy skies will still prevail. Warm temperatures will ease back into the region Saturday with highs ranging from the low 80s to upper 70s across the ArkLaMiss.
446 PM MDT Fri Apr 30 2021 Elongated upper ridge currently centered over the western US as a cut off low continues to sit over the SW US/northern Mexico, cut off from the prevailing flow. Warm air advection continues in earnest today as a thermal ridge will is centered over the forecast area this afternoon. Upper trough axis centered just off the Pacific NW coast will pivot through the region late Saturday.