Aikyam-Lab/Synoptic-Bench huggingface dataset:
Some mid level clouds moving into the Merced and Yosemite area due to an upper low moving over the Bay Area. The upper low will usher in a cool NW flow.
An early morning surface analysis showed an area of low pressure centered near Huntsville, Alabama with a cold front draped eastward across GA and the Carolinas. Aloft, water vapor imagery and 500 mb heights showed a closed low over the mid-MS River Valley. Low clouds and showers will subside and taper off this evening as the upper level low pulls away from the region. For Monday, upper level ridging builds in from the west, and expect dry conditions with high temperatures in the 70s.
Ridge axis just about overhead at this time. Ridge axis shifts east and southwest winds begin to increase.
338 AM CDT Sun Apr 23 2017 The UA low that provided portions of the Four-State Region with rainfall and reports of small hail yesterday was propagating east- southeast across the Lower Mississippi Valley early this morning, thus commencing to exit the region and leaving the FA on the backside of the system. This will allow for another chilly night with overnight lows dipping into the upper 30s across portions of southeast OK and southwest AR to the lower to middle 40s elsewhere. Tomorrow, sfc winds will gradually return to a srly flow but it will take some time for the lower levels of the atmosphere to recover from the dry conditions /PWATS less than 0.
Winds will shift to the W-NW this afternoon as a cold front moves east across the area. Otherwise, increasing clouds with lows in the lower to middle 60s. In the upper levels a closed low moves into AL/GA on Sunday and remains over the region until late Monday night. At the surface a weak low centered near Eastern TN will bring a cold front through on Sunday afternoon and into Sunday night.
1022 PM PDT Sat Apr 22 2017 Sunday will be cooler, breezy, and showery behind a weak cold front. /Pelatti 06Z TAFS: Some partial clearing is expected overnight as winds have decreased and showers associated with an earlier cold front passage are slowly moving to the north and east over Southeast Washington and North Idaho.
Cold front has moved through all but far southern ND as of 6 pm this evening. For the near term, now through sunset, cold front located from Beach to Bismarck to just north of Jamestown. Temperatures have warmed into the upper 60s to 70F in south central along and just ahead of the cold front. The cold front will continue a slow progress to the southern border by 03z Sunday. Expect snowfall accumulations of between 1 and 3 inches from Minot southeast to Harvey and Carrington; essentially between the Highway 2 and 52 corridor tonight through Sunday morning. Morning snow across north central ND, otherwise mostly cloudy and cooler Sunday with highs around 40F north to the mid 50s far south.
403 AM EDT Sun Apr 23 2017 High pressure was over the lower Great Lakes. Low pressure will move up the east coast early in the week.
240 AM EDT Sun Apr 23 2017 An area of upper level low pressure will move slowly eastward across the southeastern states on Sunday. Dry high pressure will remain in place across the southern Great Lakes and northern Ohio Valley.
Highs today will be in the lower 70s. This region will have light winds through much of the night, with lows expected in the lower 40s.
Zonal mid level flow pattern will lead to dry, warm and breezy conditions for Monday as the pressure gradient increases across the area, with the lee trough over wrn KS slowly moving into Central KS.
The 11 pm surface analysis showed a cold front extending from a 1010 mb frontal wave in northeast AL to southern TX. Upper air data showed a positive-tilt trough from New England through KS, and at least one short wave trough in the vicinity of the surface cold front. The HRRR and CAM consensus appeared to be handling current convective trends well, and indicate that most of the rain will continue to dissipate overnight, then re-develop during the morning and afternoon hours as the surface cold front translates eastward across our forecast area.
Deep trough moving onto the Pacific northwest coast this morning. Will keep the higher chance of showers over western and northwest zones. Highs will be warmer today, but may be tempered by increasing cloud cover. The GFS was very robust with QPF amounts over the west, mainly along the foothills, with over an inch of QPF Monday trough Monday night.
315 AM CDT Sun Apr 23 2017 Very little going on in the short term, as the forecast area is influenced by a southwest-northeast high pressure axis. The upper low currently over the southeast tip of Missouri will settle into northern Alabama by late afternoon, keeping the northeast flow across our area.
Cold front sinking south this evening and will move into northern SD tonight. A cold front, currently running east/west over central North Dakota, will continue sinking southward this afternoon and through tonight. While there is good agreement among models with the placement of the warm front Sunday afternoon, a slight difference of 40 miles will yield a drastic changes in temperatures. North of the front, highs may only reach the lower 50s at best. The overall pattern will remain unsettled as an upper trough digs into most of the central U.
WV imagery indicates a weak upper level ridge of high pressure transitioning eastward across the Intermountain West. Near the surface, a broad area of high pressure is sinking southward across the Western High Plains. High pressure will slide through western Kansas tonight shifting the winds from a northerly direction to a southerly direction. A lee trough will develop tomorrow bringing breezy conditions to much of western Kansas. Lows tonight will generally be around freezing across western Kansas with upper 30s across central and south central Kansas. A dry pattern continues through Monday as a weak ridge passes overhead with a dome of high pressure being the dominate feature at the surface. Lee troughing will continue through Monday leading to breezy south to southeast winds felt across western Kansas. This will help push a cold front through the area Monday night.
/26/ With deeper layer flow lining up more parallel to moisture convergence and forcing, a solid line of storms has managed to form over southeast MS ahead of the cold front with a continued marginal severe risk. /EC/ Prior discussion below: This afternoon through Sunday, A slight severe weather risk will continue through late afternoon ahead of the cold front which is roughly along the Natchez Trace Parkway as of late afternoon.
300 AM PDT Sun Apr 23 2017 Dry today, then a series of weak Pacific storms move through bringing cooler temperatures with periods of light precipitation tonight through midweek.
521 AM CDT Sun Apr 23 2017 Very little going on in the short term, as the forecast area is influenced by a southwest-northeast high pressure axis. The upper low currently over the southeast tip of Missouri will settle into northern Alabama by late afternoon, keeping the northeast flow across our area.
Low pressure will form just north of the jet tonight and move into northwest Oregon on Monday. By contrast, the wettest deterministic guidance is the EC with a half inch, but most guidance is much drier with the low being the NAM with just a tenth of an inch. All this precipitation will fall as snow in the higher mountains, roughly above 5500 feet.
303 AM EDT Sun Apr 23 2017 An early morning surface analysis showed an area of low pressure centered near Huntsville, Alabama with a cold front draped eastward across GA and the Carolinas. Aloft, water vapor imagery and 500 mb heights showed a closed low over the mid-MS River Valley. Low clouds and showers will subside and taper off this evening as the upper level low pulls away from the region. For Monday, upper level ridging builds in from the west, and expect dry conditions with high temperatures in the 70s.
405 AM CDT Sun Apr 23 2017 Quite a variety of temperatures across the local area this morning as sheltered areas have see temperatures dip into the middle 30s the past couple of hours and light southerly winds elsewhere have helped keep temperatures in the lower to middle 40s. with a continued tight pressure gradient overnight expected to help mix the lowest layers of the atmosphere.
615 AM EDT Sun Apr 23 2017 Aviation A weak cold front will diminish as it slips down into the Northern Great Lakes region today and tonight. An area of high pressure will then build into Michigan for Monday.
Morning water vapor imagery indicates a strongly positive tilt trough across central portions of the country. Ahead of the trough, a cold front continues to move eastward across the central Gulf Coast this morning. Showers and thunderstorms along a pre-frontal trough continue across the eastern sections of the area with more isolated to scattered convection along the front. Scattered showers and a few storms will linger through this morning until the upper trough passes by early this afternoon.
321 AM CDT Sun Apr 23 2017 Ridge of high pressure currently across the Mid Missouri Valley shifts east today resulting in breezy southwest winds. This should easily boost temps into the lower to mid 70s. Surface dewpoints in the lower/mid 30s, and may even mix a little lower this afternoon results in humidity values around 20-25% today, with lowest values in northeast NE. Spotty showers could occur in northeast NE Monday, but elsewhere remains dry, with another wind day with high temps in the lower to mid 70s ahead of an advancing cold front.
Quiet and dry conditions will continue today as weak upper level ridging moves eastward across the Western High Plains into the Central Plains during the period. A developing lee side trough of low pressure will strengthen across eastern Colorado today, helping to draw warmer air into the region with H85 temperatures ranging from around 10C across central Kansas to near 20C along the Colorado border. A drier pattern will continue Monday as medium range models indicate a zonal flow aloft setting up across the Western High Plains in wake of a departing upper level ridge.
/issued 213 PM CDT Sat Apr 22 2017/ Upper trough over the Central Plains will be swinging east as upper ridge builds in from the west.
A light sw flow over ne Fl/se Ga today will allow the east coast seabreeze to move inland this afternoon to near the Highway 301 corridor by early evening. Mid levels will be dry as a dry slot moves across the area between upper low to the nw and an upper trough over s Fl. A cold front will move across the area tonight accompanied by weakening convection over se Ga/ne Fl as instability wanes and strongest dynamics stay to the north.
1213 AM CDT Sun Apr 23 2017 High pressure building into the area from the northern Plains and upper Midwest is bringing clearing skies into central IL this evening, while pressure gradients around the low over the southeast U. If any temperatures drop to the mid 30s for frost it would be in and around Galesburg, but currently looks like it will be just warmer. Will make a small adjustment for cooler temperatures around Galesburg, and some cloud trends, but overall forecast is in good shape. High pressure building over the Plains and reaching eastward into the Midwest this afternoon. overnight lows have come up to the lower 40s. High pressure ridge drifts eastward overnight on Sunday. Monday will be another pleasant spring day with southerly winds and high temperatures climbing into the lower 70s.
202 AM CDT Sun Apr 23 2017 High pressure will begin building into the region today resulting in sunny skies and dry conditions. That high pressure will build overhead tonight resulting in clear skies, light winds, and cool temperatures. Lows tonight should dip into the lower 40s.
1144 PM MDT Sat Apr 22 2017 Updated aviation and fire weather sections This morning's 12Z H500 hand analysis had ridging moving into our eastern CWA. This ridge will remain transitory moving over the Rockies into the Plains over the next 24 hours. The best precipitation chances remain north of interstate 70 with the high terrain favored with this first in a series of storms. Again strong ridging over the North Atlantic and Eastern Pacific will carve out a broad and cold trough over the western 2/3 of the CONUS by mid week. The models are really struggling with this pattern change in how energy is dropped into and rotated out of the larger mean trough.
405 AM MDT Sun Apr 23 2017 High pressure ridge aloft will shift across Colorado today and then into central plains tonight. Lower elevations will see temperatures climb well into the 70s with the warm advection and building high pressure. Gusty winds will likely continue into mid morning over the high terrain according to spatial cross-sections. Enough instability will allow for the slight chance of afternoon thunder over the high terrain before the showers spread over the plains that evening. Snow levels are expected to drop to around 7500 feet that night, with the higher mountains seeing 2 to 6 inches possible overnight. A cold front will push south across the plains after midnight to increase the chance of showers south.
Cold front now well out of the area with a northerly flow in place across South Texas and building mid level ridging. Leaning a bit cooler than guidance for some locations with clear skies and upper level ridge axis overhead.
143 AM EDT Sun Apr 23 2017 High pressure should maintain dry weather today. Low pressure tracking toward the Southeastern United States will result in rain chances for areas southeast of Pittsburgh for the start of the new work week. High pressure should result in dry weather today as an upper low deepens across the MS/TN Valley regions. This scenario should confine rain chances to the I 68 vicinity, and over the ridges and eastern CWA periphery during the period.
Severe thunderstorm activity has diminished over the last hour as a cooler, more stable air mass has moved into the area at the low levels. We will see some cold air advection behind this front, so expecting highs only in the low to mid 60s on Sunday with lows dropping into the upper 40s to low 50s on Monday morning. The work week will start off with temps in the upper 60s to lower 70s and overnight lows in the lower 50s and decreasing clouds thanks to that cooler and drier air. As a ridge begins to build behind the departing low, skies will become mostly clear and temps will be on the rise.
317 AM CDT Sun Apr 23 2017 Ridge axis extending across north central Kansas into central Iowa will drift southeast into the area today. North-northeast flow will prevail ahead of the ridge continuing to provide weak cold advection. full sunshine and and strong late April insolation will warm our early morning lows from the low to mid 40s up into the upper 60s and lower 70s this afternoon. The ridge will continue drifting east tonight. It does look like lows will be a bit warmer on Monday morning across the area due to the warmer start to the evening. Carney Closed upper low that will be over the southeast CONUS early on Monday morning will move offshore and up the East Coast by midweek.
109 AM EDT Sun Apr 23 2017 An upper level low will drift slowly southeast across the Tennessee Valley tonight into Sunday. Upper low to drift south into the TN VLY Sunday. As upper low shifts south expect all pcpn to stay south of the area. Lows tonight will range from the upper 30s in the northwest to the lower/mid 40s across the southeast. The upper level low will continue to drift slowly southeast into the southeastern United States Sunday through Sunday night. Expect highs on Sunday mainly in the low to possibly mid 60s.
253 AM EDT Sun Apr 23 2017 An area of upper level low pressure will move slowly eastward across the southeastern states on Sunday. Dry high pressure will remain in place across the southern Great Lakes and northern Ohio Valley.
A weak cold front is moving across southwest Idaho this morning (around 3 AM MDT) with showers generally located out ahead of it.
The 06z surface analysis showed a cold front stretching from Louisiana northward into Indiana.
Overnight lows are now expected to range from the lower 40s across the Cumberland Plateau Region to the mid 40s elsewhere. Conditions will vary from MVFR to VFR through 10Z as scattered showers accompany a cold front passage. After 18Z, an approaching low pressure system from the northwest will begin to create gusty WSW winds.
401 AM EST Tue Mar 6 2018 An occluded front will lift north into the area today as weakening low pressure approaches from the west.
23z sfc analysis shows a warm front lifting through central and eastern Kentucky. Meanwhile, with light winds, dewpoints are quite dry in the teens northeast to the lower 30s in the southwest, while most places are somewhere in the 20s. This dryness will impact the ability of the rain to make it to the ground later this evening and overnight ahead of the system's cold front as the column starts to moisten up. Closer to the surface a warm frontal boundary will pass through the area overnight, bringing with it a likely chance of showers for most locations in our forecast area. Not far behind this feature a cold frontal boundary will enter the Commonwealth from the west during the day Tuesday and speed through eastern Kentucky late Tuesday evening.
Latest water vapor imagery shows the upper low that was across South Dakota Monday, now into northern Iowa. East to west surges of light snow from the overnight period around the upper low are beginning to taper off, as the last surge of light to moderate snow is located from Minot to Bismarck. The high resolution models initialized this area of snow well, with trends through the morning showing a slow diminish to the light snow across central and into portions of western ND.
Periods of light snow can be expected today as low pressure moves east across Iowa this morning making it into central Illinois by this afternoon.
A mid-level frontogenetical band will be weakening over that area as the associated area of low pressure in Iowa shifts towards the southern Great Lakes region.
Cold front could bring showers and storms tomorrow. The brief influence of high pressure over the region today will yield another dry and sunny day.
A cold front will approach terminals from the northwest, bringing broken VFR cigs and eventually showers/storms to all terminals, however this will mainly occur after 06z Thurs. Sufficient mixing will take place shortly after sunrise and this will allow increasing low-level winds ahead of an approaching cold front to be transported to the surface. The aforementioned front, currently analyzed across the Lower Mississippi Valley, will approach our area tomorrow night.
Surface winds are slacking off as well as the low pressure center continues to drop southward and away from the area. So the variable amounts will continue, not everyone is going to get the higher end totals, and in some instances they may be just a few miles away. The event should begin to diminish slowly from the Lake of the Woods region into the highway 2 corridor later tonight, taking the longest to end across the far south and southwest FA. expect high pressure to build in with lighter winds and more tranquil conditions.
1200 AM CST Tue Mar 6 2018 A cold front is currently draped along the Upper Texas coast and will be moving offshore in the next few hours. /ISSUED 902 PM CST Mon Mar 5 2018/ Cold front and associated line of showers and isolated thunderstorms continues to work its way across Southeast Texas this evening with the greatest thunderstorm concentration off to our east in Louisiana where the airmass is much more unstable.
204 AM MST Tue Mar 6 2018 Water vapor loop showed the powerhouse upper low centered over northwest IA, with strong northwest flow aloft dominating the CWA. Temperatures ranged from the lower teens to mid 20s, with wind chills from 0 to -10.
Rain will exit the area behind a cold front that will pass through the area in the mid to late morning, and drier air behind it will raise cigs to VFR and shift winds to the west, with clearing occurring in the afternoon.
Highs will range from the mid 60s in the Big Country to the lower 70s along the I-10 corridor.
302 AM CST Tue Mar 6 2018 Strong upper low centered over Iowa and dropping south southeast at this hour, with a notable lobe of energy wrapping southward into southern Nebraska at this hour. Fire concerns remain, although with higher RH values and cooler temperatures today, will hold fast with the wind advisory and messaging of very high fire danger.
Deep ridging and associated large-scale subsidence have provided a dry and stable atmosphere across the service area.
The low is expected to continue pivoting through the region, Tuesday. Precipitation chances and wind speeds will diminish from west to east through the afternoon hours, as the low ejects out of the region.
213 AM EST Tue Mar 6 2018 A cold front will move into the region from the west today bringing widespread showers.
323 AM EST Tue Mar 6 2018 A cut off low is located across the northern plains this morning with a shearing out cold front pushing east across eastern Kentucky. An area of showers is working northeast into eastern Kentucky from Tennessee just ahead of the cold front. By tonight, the closed low will open up and spread into the Ohio river valley.
scattered to broken mid clouds look to spread across mainly Northeast Oklahoma and Northwest Arkansas as a low pressure system begins to push southeast and approach the region. These clouds look to remain possible mainly over Northwest Arkansas Tuesday evening as the low moves through. With the very dry air in place, temps will be chilly first thing in the morning, dipping down to around freezing.
Strong cold air advection behind this low will bring northwest winds between 25 to 35 mph with gusts to 45 mph. These strong northwest winds will usher in some cooler temperatures for today with highs in the upper 30s across the north to the mid 40s south.
Finally, some breaks in the clouds combined with antecedent moisture from daytime snow melt, will bring about the potential for patchy freezing fog across the plains of North Central Montana tonight and tomorrow morning. - Moldan Weak weather disturbances in northwest flow aloft will bring scattered snow showers to the area the rest of this afternoon and early evening, followed by drier conditions through mid-week as an upper-level ridge builds over the area.
As high pressure settles into the region tonight, winds will generally become calm through the early morning hours. /Issued 242 PM CST Mon Mar 5 2018/ /Tonight/ The cold front and rain has now moved south of the region, and a tranquil and cool night is expected. A few locations across the northwestern areas of the CWA may fall to near freezing, but these temperatures should only occur for a few hours around daybreak.
327 AM CST Tue Mar 6 2018 Low pressure will continue to spin just east of the region through Tuesday. In addition to snow potential, the low will bring some extremely high winds to the region. Upper level ridging will expand east across the area mid to late week.
As of 4 AM, surface observations indicate that the surface cold front extends through far southeastern Acadiana out into the northwestern Gulf of Mexico. High pressure will then begin to build into the region allowing for skies to clear throughout the day.
Light snow looks to persist through much of the morning and afternoon as the low progresses across the forecast area.
Snow continues to wrap around the low, with more significant banding setting up near and just east of the James River Valley for the past several hours. The dry slot has diminished most of the precipitation across southwest Minnesota, east central South Dakota and the Iowa Great Lakes region, however some light snow and certainly strong winds will persist through midday as the low slowly tracks away from the region. With winds around 10 mph and clouds, temperatures will not completely tank, however lows should drop to the lower to mid teens for most locations.