Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 309 PM CST Mon Feb 24 2020/ An impressive upper-level cyclone is moving across the Ozarks this afternoon with strong, large-scale ascent spreading into northeast AR and southeast MO. At the surface, a 1000 mb low is located over south-central MO with a cold front extending south through central AR. A warm front runs from this low to the southeast across the Mid-South. Dewpoints in the warm sector (delta counties south of I-40) are in the lower 60s with low/mid 50s on the cooler side of the front. As this warm front continues to lift north this afternoon and evening, we'll see instability increase to ~500 J/kg across the western half of the CWA. Dry weather is expected tomorrow in the wake of a Pacific cold front.
218 PM PST Mon Feb 24 2020 Light winds persist through much of the week as high pressure settles into northeast California and western Nevada. Low pressure may impact the region this weekend with gusty winds and the chance for rain and snow showers.
309 PM CST Mon Feb 24 2020 An impressive upper-level cyclone is moving across the Ozarks this afternoon with strong, large-scale ascent spreading into northeast AR and southeast MO. At the surface, a 1000 mb low is located over south-central MO with a cold front extending south through central AR. A warm front runs from this low to the southeast across the Mid-South. Dewpoints in the warm sector (delta counties south of I-40) are in the lower 60s with low/mid 50s on the cooler side of the front. As this warm front continues to lift north this afternoon and evening, we'll see instability increase to ~500 J/kg across the western half of the CWA. Dry weather is expected tomorrow in the wake of a Pacific cold front.
438 PM MST Mon Feb 24 2020 Pretty busy day thanks to the cold front that moved through earlier this morning. All this is thanks to the cold front, a tight pressure gradient, instability aloft, and favorable upper level dynamics bringing the gusty winds to the surface. The current winter weather advisories for the northern and central mountains and Flat Tops will remain in effect as short range models continue to show some light snow accumulation for those areas and though winds will die down overnight, the higher elevations will see some higher gusts from time to time. For tomorrow, a few lingering showers are possible over the higher terrain but, by and large, the precip will be over.
556 PM CST Mon Feb 24 2020 The low pressure center of the storm system was over central Nebraska, with an inverted trough extending northwestward across western SD and along the MT/ND border. Current radar trends and high resolution data continue to suggest that the highest totals will be seen under the west to east oriented band that has situated itself from far eastern Adams county, and over into Grant, Sioux, southern Morton, and Emmons counties. Snow will move completely out of the area by Tuesday morning, giving way to cooler temperatures with overnight lows in the teens and highs in the 20s.
With cloudy skies and warm south-southwesterly flow, lows tonight will be in the low 60s.
High pressure will gradually build into the region through the remainder of the week.
In fact, current consensus guidance, backed by ensemble means, supports highs across much of NE Montana in the upper 30s to mid 40s for the upcoming weekend with dry weather conditions as well for now as upper ridging drives rising heights and large scale subsidence over the western U. Winds: In the east, ahead of the cold front, winds should remain generally easterly at 10-20 kts.
Cloud and shower coverage was keeping temperatures a little cooler than expected acrs much of our LA zones, with temps in the lower to middle 60s acrs Cntl/SW LA, while further east acrs Acadiana temperatures warmed to near 70 before showers moved into the area. The front will usher in a cooler airmass, with overnight lows about 10 degrees lower than last night, with min temps in the middle 40s to lower/middle 50s.
319 PM CST Mon Feb 24 2020 As of 21Z Monday afternoon, the upper low which brought widespread rain to the area last night and today has progressed into central MO, taking the associated rainfall east as well. Temperatures have warmed into the lower 50s across north-central KS where sunny skies reside while temperatures remain in the middle 40s across far eastern KS where overcast skies remain.
The primary sw/ne oriented H3 jetmax continues to traverse the region this evening ahead of a MidSouth H5 trough and associated surface cyclone/front. Abundant moisture and upper jet support has allowed for widespread shra this afternoon ahead of a cold front. CDG Chattanooga Airport, TN 48 63 43 52 30 / 90 10 10 50 20 Knoxville McGhee Tyson Airport, TN 46 63 44 52 30 / 80 20 20 60 20 Oak Ridge, TN 46 63 43 52 29 / 80 20 20 70 20 Tri Cities Airport, TN 43 61 42 54 27 / 80 30 10 80 30.
Cold front will move through the KABI terminal after 06Z with gusty northerly winds accompanying the front. /00Z TAFS/ A cold front will move across West Central Texas tonight and early Tuesday morning switching winds around from the north after midnight. Stronger cold front will follow tonight and drop temperatures to below normal values for Tuesday.
/NEW/ /Through Tuesday Night/ An upper low currently moving from the Rockies into the Plains will help push a cold front southward through the area Tuesday morning.
Otherwise, cold front has continued racing south of all TAF locations. /issued 546 PM CST Mon Feb 24 2020/ A cold front was moving quickly southward into the northern Texas Panhandle late this afternoon with strong 1 hour surface pressure rises near 4 millibars but expected to increase as high as 6 millibars per hour as it moves into the southern Panhandle early this evening. Otherwise, expecting dry cooler and gusty north-northwest flow behind this front later tonight and Tuesday. /issued 247 PM CST Mon Feb 24 2020/ The next cold front, which is currently in western NE/northern CO, is expected to push through the FA shortly around/after 00Z tonight.
1138 PM CST Mon Feb 24 2020 Convection continues to fester late this afternoon along and ahead of a passing cold front. Light precipitation will persist this evening into Tuesday as the warm conveyor belt wraps around the exiting mid- latitude cyclone and keeps low-level moisture in place. Model guidance is in excellent agreement in showing an amplification of the 500- mb trough as it digs south into the Four Corners Region by Tuesday morning. As this trough digs south, the tightening geopotential height gradient ahead of the trough will result in a strengthening jet streak downwind of the trough, with 12z guidance now developing a 110-130kt 300-mb jet streak from the southern Plains into the Ozarks.
Latest sfc obs show the cold front racing south, and moving into the CWA. /issued 200 PM CST Mon Feb 24 2020/ NW mid-level flow will persist thru Thur setting up a favorable pattern for frequent dry cold fronts. MSLP gradient sufficient for post-frontal breezy conditions for a few hrs and it will be noticeably cooler Tue than Mon. The parent anticyclone is strong and Wed AM a hard freeze is possible across most areas, especially if the wind abates a few hrs before sunrise, cooler Wed PM.
323 AM EST Tue Feb 25 2020 Expect persistent dreariness roughly along the I-64 corridor, as a trough lingers over the Ohio River today and tonight.
853 PM PST Mon Feb 24 2020 Fair and warmer weather is expected this week under building high pressure and offshore flow.
Winds will shift to northwest in advance of the next cold front Tuesday morning.
Ahead of this front, high pressure over the western Atlantic is now centered near Bermuda and continues to retreat slowly eastward. The Keys lie within moderate SE flow along the southwestern flank of this high. The Keys still lie underneath the northern edge of flat ridging which is centered over the Caribbean Sea.
Breezy northeast winds and briefly cooler temperatures are expected on Tuesday, before temperatures warm up later in the week. We're still on track for a pesky cold front on Tuesday with temperatures dropping 10 to 15 degrees from high temperatures seen on Monday and gusty north to northeast winds. Winds will be strongest, gusting to around 40 mph, in favored locations along and south of the Mogollon Rim After a warm day today, a dry cold front will push down across the Northland on Tuesday with cooler daytime temperatures and gusty northeast winds, especially along and just south of higher terrain features.
1034 PM MST Mon Feb 24 2020 Pretty busy day thanks to the cold front that moved through earlier this morning. All this is thanks to the cold front, a tight pressure gradient, instability aloft, and favorable upper level dynamics bringing the gusty winds to the surface. The current winter weather advisories for the northern and central mountains and Flat Tops will remain in effect as short range models continue to show some light snow accumulation for those areas and though winds will die down overnight, the higher elevations will see some higher gusts from time to time. For tomorrow, a few lingering showers are possible over the higher terrain but, by and large, the precip will be over.
Breaks are becoming more numerous south of I-72, though good chances will continue through the night as the low moves northeast to near Evansville. As it pulls out of the long- wave trough in the central portion of the country, it should continue to fill. Some cooler air should wrap into the system late tonight and Tuesday which could make for a mix of wintry pcpn in the far northwest portion of the forecast area. The period begins with a deep trough over the Great Lakes and a strong ridge centered along the west coast.
/issued 322 PM CST Mon Feb 24 2020/ A low pressure system will be moving through our area today and Tuesday.
High pressure will gradually build into the region through the remainder of the week. Utah remains under a northwesterly flow aloft this evening in between a trough over the Rockies and western Great Plains and a ridge centered just off the West Coast. Behind the passage of the cold front last night, the airmass has dried and trended more stable. Expect clear to partly cloudy (over/near the higher terrain of northern Utah) skies overnight. Thereafter, high pressure will gradually build farther east over the course of the week, so expect a warming trend to commence with dry conditions prevailing.
The next mid/upper level trough will be approaching from the west later tonight, and a few showers may make it into the Plateau counties toward sunrise. A couple of upper level troughs swing through the Southern Appalachian region during the period.
Mid level trof axis continued to slide through the region this evening with widespread low level ceilings and patchy areas of light drizzle/rain remaining across Eastern Oklahoma and Northwest Arkansas. Temps under the low clouds were in the low 40s to low 50s over the CWA. the mid level trof axis is expected to exit the region with the remaining light drizzle pushing off to the east and northeast. have added patchy drizzle to parts of Northeast Oklahoma and Northwest Arkansas for the next few hours before the trof axis exits.
Cold front is east of the Mississippi River but not to the Tennessee River just yet.
The primary sw/ne oriented H3 jetmax continues to traverse the region this evening ahead of a MidSouth H5 trough and associated surface cyclone/front. Chattanooga Airport, TN 63 43 52 30 45 / 10 10 50 20 0 Knoxville McGhee Tyson Airport, TN 63 44 52 30 42 / 20 20 60 20 0 Oak Ridge, TN 63 43 52 29 43 / 20 20 70 20 0 Tri Cities Airport, TN 61 42 54 27 38 / 30 10 80 30 0.
These cooler conditions will last through the rest of the work week with highs in the 20s and lows dipping into single digits. Warmer conditions return over the weekend with this associated mid-level ridging.
224 AM CST Tue Feb 25 2020 (Today and Tonight) As of 1 am, a cold front is moving south across the northern Concho Valley/northern Heartland, with gusty northerly winds of 15-20 mph and gusts of 30 mph behind it. Another, stronger cold front will come down this evening, bringing an additional push of cold air, with overnight lows falling into the upper 20s/low 30s.
Warmer temperatures for most of Western Washington are expected to start in the wake of this system as high pressure builds off of the coast.
525 AM CST Tue Feb 25 2020 A cold front moving through the area this morning with a brief gusty north wind behind it and some patchy stratus with MVFR cigs. /issued 402 AM CST Tue Feb 25 2020/ An upper-low, which is now located over the Central Plains, has sent a cold front surging southward. High temperatures are expected to be much cooler today only reaching the 40s and 50s w/a few 60s further south. Strong CAA will continue into Wed morning where temperatures will plunge into the low to mid 20s.
446 AM MST Tue Feb 25 2020 Current GOES-East nighttime microphysics imagery shows a picturesque comma shaped low pressure system. The trough has been progressive and with its latest movement trends conditions are expected to improve by this evening. As the upper level trough continues to move to the east, upper level flow orients straight north to south over the high plains.
This next system is associated with an upper level low that is digging its way south as a trough slides south, east of the Rockies. At the upper low approaches the area additional precipitation will, develop early this afternoon and continuing through this evening and into tonight. With road temperatures rather warm, the impacts to travel will likely only be associated with bridges and overpasses and anywhere that heavier snows may fall.
402 AM CST Tue Feb 25 2020 An upper-low, which is now located over the Central Plains, has sent a cold front surging southward. High temperatures are expected to be much cooler today only reaching the 40s and 50s w/a few 60s further south. Strong CAA will continue into Wed morning where temperatures will plunge into the low to mid 20s.
The main upper trough axis will approach the area tonight and this combined with PWATS of around. Lows will fall into the low/mid 40s for most of the area. The deep trough aloft moves over the region tomorrow and temperatures continue to drop behind todays front/low pressure system.
Low pressure may impact the region this weekend with gusty winds and the chance for rain and snow showers. There will be very little appreciable weather this week with high pressure bringing above average temperatures to the region, low/mid 60s warming into upper 60s by mid week for western Nevada and upper 50s to around 60 for Sierra valleys.
535 AM CST Tue Feb 25 2020 Main concern is the impact from a combination of snow and wind today into early evening as an upper trof/low digs southward into Kansas. Darmofal A moderating trend still looks reasonable into the upcoming weekend as the eastern CONUS longwave weakens/moves eastward allowing a more progressive westerly flow over the Plains and troughing across the West.
This weak wave is the lead impulse in a larger-scale trough that will bring a fast-moving upper low pressure from western NE across northeastern OK through the day. A cold front will follow this through the day with the airmass source across the Rockies.
233 AM MST Tue Feb 25 2020 The upper low is well southeast of Montana now, but in it's wake is still a prominent area of convergence and moisture that will continue to bring widespread snow to much of SE Montana through this morning. A north-south oriented upper jet will pass over the area late this morning, bring about a dramatic shift from snow to relatively mild conditions as it brings with it a broad upper ridging, yet somewhat unsettled northwest flow. Cold brough in by the previously discussed upper low will be short lived, as downsloping winds will pick up, and even today, temperatures will reach the mid 30s (upper 20s in far SE MT), and a continuous gradual warmup for the rest of the week, as highs will already reach the mid 40s for Wednesday.
Expect persistent dreariness roughly along the I-64 corridor, as a trough lingers over the Ohio River today and tonight. Precip chances return by daybreak as well, as an upper trough rotates into western KY. Not expecting much in the way of accumulations given the warmer ground temps, but overall best chances to see a dusting to light accumulation of snow will be across southern IN and across north- and east-central KY. As the low pressure system moves off to the northeast Wednesday night, precip will taper off from west to east.
A stubborn chain of showers managed to form overnight along a Cuban land breeze boundary, drifting northward and delivering isolated light showers across the Lower Keys overnight. Certainly feeling more like the warm season when ample moisture in the lowest 100 mb of the profile is sufficient enough to drive mesoscale forced nocturnal shower formation.
This will be followed by cooler and wetter conditions, representing what would be the first rainfall over inland areas in more than 2 week.
533 AM EST Tue Feb 25 2020 Periodic rain is expected through Wednesday with crossing low pressure. An upper trough across the Central CONUS/Plains region is expected to deepen today. Showers should overspread the region again with the approach and passage of the trough.
Aloft, a closed low was positioned over western Nebraska, with northerly flow over the Dakotas. As the surface/upper low continue to push almost straight south, snow is expected to taper off north to south and end this morning in the southernmost counties of our forecast area. Wednesday will be quiet with similar high temperatures as today, although the far west should warm up to the lower 30s with warm air advection and weak southwesterly flow.
Breezy northeast winds and briefly cooler temperatures are expected on Tuesday, before temperatures warm up later in the week. A backdoor cold front associated with the low pressure over Colorado will move into the area today. The Cold front will come out of the northeast, and bring colder temperatures to the region along with gusty winds. No precipitation is expected with this system Typical to these backdoor cold fronts, winds will be out of the northwest ahead of the frontal passage today, with a shift to the northeast behind the front.
A longwave trough axis will remain across the Great Plains today with a surface frontal boundary draped from coastal Mississippi into southeast Alabama. 850mb temperatures remain warm in the 8-12 C range as the bulk of the cold air remains confined to the Great Plains, so expect decent warming this afternoon with highs climbing into the low to upper 60s. The main upper trough axis will approach the area tonight and this combined with PWATS of around. Lows will fall into the low/mid 40s for most of the area. The deep trough aloft moves over the region tomorrow and temperatures continue to drop behind todays front/low pressure system.
Dry and warm conditions are expected through the work week as a ridge of high pressure builds over the west coast. Cooler and potentially showery conditions are expected over the weekend. Upper level ridging will result in warming temperatures across the region this week.
West to northwest winds will increase in strength behind the cold front for most of the E TX and SW AR sites at the end period. Then, around sunset, a cold front will enter in our northwest zones and sweep quickly southeast across the region.
A cold front will move through Wed morning just after sunrise for much of the area.
Then, around sunset, a cold front will enter in our northwest zones and sweep quickly southeast across the region.
338 AM CST Tue Feb 25 2020 The cold front from yesterday evening has cleared the entire region which has allowed some colder air to filter into the area. An upper level system will dive south across the forecast area this afternoon which will help to bring another cold front through the area.
Today Through Wednesday Night After a storm system/cold front exited Arkansas to the east overnight, there will be a brief lull today. Heading into tonight, low pressure aloft and an associated secondary cold front will swing through the region from the Plains. In the Ozark Mountains of the northwest and the higher elevations of the Ouachita Mountains, some light snow is expected. The period will end with high pressure building over the region from the central/southern Plains Wednesday night.
High temperatures reach the mid 30s to lower 40s, but northerly surface winds will increase to 15 to 25 mph which make it feel cooler. As the upper low diving through the western High Plains makes a turn the east, the northern edge of the precip could the NE/KS/MO/IA border region, but again, the measurable precipitation will remain to the south across KS and MO.
However, another cold front coming down tonight will increase N winds back into the 12-17 KTs with gusts of 20-25 KTs. /issued 224 AM CST Tue Feb 25 2020/ (Today and Tonight) As of 1 am, a cold front is moving south across the northern Concho Valley/northern Heartland, with gusty northerly winds of 15-20 mph and gusts of 30 mph behind it. Another, stronger cold front will come down this evening, bringing an additional push of cold air, with overnight lows falling into the upper 20s/low 30s.
/issued 350 AM CST Tue Feb 25 2020/ This morning's GOES-16 upper level water vapor imagery indicates a long wave trough extends from the West Coast into the Great Lakes region. At the surface, a cold front will progress rapidly southeastward and is expected to move through the CWA overnight tonight. The remainder of the week looks relatively quiet with northwesterly flow aloft and high pressure centered over the region at the surface.
335 AM CST Tue Feb 25 2020 Early morning surface and satellite observations show a cold frontal zone pushing southward through the region out of southern Manitoba. The leading edge of this front is delineated by a stronger push of cooler air, increasing surface winds with gusts into the 15-20 knot range, and developing scattered low/mid level stratus.
A ridge over the Pacific Northwest coast will be the main influence on the weather of the northern Rockies today and through the rest of the work week.
350 AM CST Tue Feb 25 2020 This morning's GOES-16 upper level water vapor imagery indicates a long wave trough extends from the West Coast into the Great Lakes region. At the surface, a cold front will progress rapidly southeastward and is expected to move through the CWA overnight tonight. The remainder of the week looks relatively quiet with northwesterly flow aloft and high pressure centered over the region at the surface.
315 AM CST Tue Feb 25 2020 Main concern is the impact from a combination of snow and wind today into early evening as an upper trof/low digs southward into Kansas. Darmofal A moderating trend still looks reasonable into the upcoming weekend as the eastern CONUS longwave weakens/moves eastward allowing a more progressive westerly flow over the Plains and troughing across the West. Strong and gusty northerly winds will also develop in the wake of the cold front with strong low-level cold air advection and large pressure rises in the wake of the front.
531 AM CST Tue Feb 25 2020 Early morning surface and satellite observations show a cold frontal zone pushing southward through the region out of southern Manitoba. The leading edge of this front is delineated by a stronger push of cooler air, increasing surface winds with gusts into the 15-20 knot range, and developing scattered low/mid level stratus.
952 AM EST Tue Feb 25 2020 A warm front over the forecast area will lift northward and through the area today ahead of an approaching cold front. The cold front will be in the area Wednesday.
Southwest flow aloft and at the surface ahead of the next upper Plains trough will keep the mid state warm in the mid to upper 50s, but still mostly cloudy. Chances for rain will return late in the evening and overnight into Wednesday morning as the upper trough moves eastward. A cold front will move through as well on Wednesday morning, which will cool temperatures Wednesday afternoon and into the evening. The upper trough axis will be through the region by late Wednesday afternoon, and 850 mb temps will bottom out around -6C to -8C.