Aikyam-Lab/Synoptic-Bench huggingface dataset:
/26/ Today and Tonight: Ridge axis at the surface and aloft is bisecting the forecast area at the moment, but should shift east rapidly this morning and facilitate a change in airmass. Southerly low level flow along with anomalous warmth just above the boundary layer will help achieve maximum temperatures some 5 to 10 degrees warmer than yesterday. Its attendant cold front will move rapidly through the Plains today and into the MS valley tonight. /26/ Wednesday and Wednesday night: Moist southerly flow will persist into Wednesday morning ahead of the approaching cold front, with an expanding low stratus deck and perhaps in the southern portion of the area some fog. The front will depart during the evening hours, with a slightly cooler airmass superseding the brief warm up.
546 AM CST Tue Jan 24 2017 Flurries will quickly taper off this morning as mid-level cyclonic flow moves off to the north and east and the atmospheric profile dries out in the low levels. Most of the day today looks to be quiet as some subtle mid-level ridging and negative vorticity develops at the 500 mb level. As low pressure continues to move northeast Wednesday night, the flow will become northerly from the surface on up into the upper levels.
945 AM EST Tue Jan 24 2017 High pressure will build into the area today and tonight, then prevail through Wednesday.
went a few degrees warmer toward the GFS MOS and increased wind speeds by 3 to 4 KTS in the afternoon. A cold front will be dropping in toward sunrise in the northern Big Country.
Latest upper analysis shows a broad trough over the western Conus with a 150KT jet streak on the southeast side of the upper trough, over New Mexico and Kansas, and a 125KT jet streak rounding the base of the upper trough in California. There is a chance of light snow over the northern Black Hills and the moisture wraps around the west side of the low pressure system, there is also a chance of snow esp on Wednesday morning over south central South Dakota closest to the low pressure system. A broad upper level trough will remain across the eastern half of the US late in the week, with a highly amplified ridge over the west coast.
Strong high pressure aloft will lock in over the west coast states for late in the week and on through the upcoming weekend.
1000 AM EST Tue Jan 24 2017 Low pressure off the mid Atlantic coast will continue moving northeast today. High pressure will build in from the west through Wednesday.
The cooler northwest flow will keep temps from rising much today even with the slight increase in 850 temps and weak ridging aloft. Dry conditions continue overnight as high pressure briefly builds in. Winds start to turn southerly after sunset and will help keep low temps mild and in the lower to middle 40s. This will stretch a cold front south through Texas by Wed morning.
As the low passes through tonight, colder air will usher its way in behind it with lows ranging from near freezing to the mid 30s from west to east, respectively. Wraparound moisture on the backside of the low tomorrow, along with the colder air in place, will allow for continued rain/snow chances, but again, little to no accumulation is expected.
401 AM CST Tue Jan 24 2017 Left exit region will support cyclogenysis to our south today, with a low pressure system that will track across the Central Plains before hooking northeast into the Midwest. Mixed winds on the backside of this system are not particularly strong, on the order of upper teens with gusts into the low 20s (knots). Profiles also suggest light snow lingering through much of the week, particularly in the eastern CWA thanks to the upper trof lingering across the Western Lakes region, with low level saturation within the dendritic growth zone. Expect upper level ridging along the west coast and into western Canada with upper level troughing across eastern Canada/eastern U.
635 AM EST Tue Jan 24 2017 Low pressure off of New Jersey will move up the coast through the day. High pressure in the central plains will briefly ridge into the region on Tuesday.
Can see the upper closed low spinning over Wyoming. TD's in the low to mid 30's with east to southeast flow up to 700mb. Initial precipitation will have the possibility for some freezing type over the southwest with snow to the northwest. Snow will move out of the area by 18z Wednesday as the low continues to move East.
858 AM MST Tue Jan 24 2017 Slow-moving upper low over WY continues to bring some mostly light snow to our south this morning. Will make no changes to the highlights in place just yet, but snow along the Beartooth Foothills is decreasing. Otherwise, a chilly day with decreasing snow and highs in the lower-mid 20s today. As this low pushes into the Dakotas on Tuesday night widespread snowfall comes to an end.
The only mentionable aviation concerns expected in this TAF period is an approaching cold front expected to shift winds to the north late tonight. An upper level trough is over the western states. A warmer southwest to south lower level flow off the Mexican Plateau strengthens ahead of the front leading to record or near record high temperatures today, January 24th, across the Hill Country to along I-35 with well above normal high temperatures elsewhere.
A broad upper low is extending from the Great Basin northward into the Canadian prairies this morning. Portion of the low in the Great Basin will be moving east into the central plains through today. Mid level moisture and weak vorticity along the Canadian border will continue to produce occasional light snow showers today through Wednesday with a colder high pressure over sliding over northwest Montana.
An upper ridge over the eastern Plains amplifies while building into the eastern states through tonight. Highs today will be in the mid to upper 60s while lows tonight range from the mid 40s inland to the lower 50s closer to the coast.
Vertically stacked low pressure southwest of the Bay Area will continue to fill as it moves southeast today. High pressure will build over the area later today and tonight with clearing skies.
Currently, positively tilted long wave upper level trough extends from southern California north-northeast into central Canada. Main features impacting our region (or soon to be) are a closed low over the Central Rockies, an embedded S/WV trough over eastern North Dakota, and another area of PVA over southern Saskatchewan. Closed low over the Central Rockies will continue east-northeast across Nebraska today, generating a large area of accumulating snow over South Dakota and Nebraska.
702 AM EST Tue Jan 24 2017 Low pressure off the mid Atlantic coast will continue moving northeast today. High pressure will build in from the west through Wednesday.
Satellite depicts a large upper low across the wrn states with several potent shrtwv trof embedded within the broad cyclonic flow aloft. How far e and s will these wind expand? With the 75h winds of 45-55kts from the Davis Mtns into the Chisos Mtns the potential for high wind in the highest elevations is good. A cold front will move thru Wed and high temps will fall back to around 5 degrees below normal with much drier air accompanying the front.
Left exit region will support cyclogenesis to our south today, with a low pressure system that will track across the Central Plains before hooking northeast into the Midwest. Mixed winds on the backside of this system are not particularly strong, on the order of upper teens with gusts into the low 20s (knots). Profiles also suggest light snow lingering through much of the week, particularly in the eastern CWA thanks to the upper trof lingering across the Western Lakes region, with low level saturation within the dendritic growth zone. Expect upper level ridging along the west coast and into western Canada with upper level troughing across eastern Canada/eastern U.
Thereafter, a mostly clear sky and light winds will develop has high pressure settles in by late this afternoon and early this evening.
614 AM EST Tue Jan 24 2017 Upper level low just off the North Carolina coast continues to spin and lift off to the north along the east coast. The clearing skies will allow temperatures to drop into the low 40s to upper 30s. By Wednesday, a strong cold front will be approaching the Ohio River valley. Ahead of the cold front, we'll see very warm temperatures, generally 15 to 20 degrees above climatological highs, and breezy southwesterly winds. NWP guidance has shown a broad band of light precipitation ahead of the cold front during the day Wednesday, and have included PoPs in the forecast to account for that. The cold front will pass through the region overnight on Wednesday.
The heart of the upper low was located over central Wyoming but a 120+ kt jet with embedded 140 kt jet streak was building its way across the central Plains and a strengthening short wave trough was moving out of the Four Corners region. Any precip will most likely fall as rain today but during the evening temperatures will plummet as the low passes and there is a small chance for light snow or even a brief period of light freezing rain/drizzle. The midlevel closed trough lifts towards the Midwest region on Wednesday. The cold, more seasonable airmass funnels southward through the remainder of the week as an open, midlevel trough retrogrades towards the southwest in response to a building ridge over much of the western conus.
and rain and snow showers for the plains this Broad upper low with embedded disturbances continues to slowly move eastward across northern CO and WY over the net 24 hours. Another 2 to 5 inches looks likely for the higher elevations of the southwest and central mountains. with 1 to 3 for the lower adjacent valley locations. isolated showers across the plains early this morning will race off to the northeast and a cold front will surge through the southeast plains late this morning through the afternoon. however CAA aloft will result in temperatures around 10 degrees cooler than yesterday for most areas. then southward into the northern slopes of the Raton Ridge during the evening in area of wrap round.
Cold front associated with the aforementioned wave passes tonight so any ongoing wildfires can expect a wind shift. Noticeably cooler temps return for mid to late week more typical of late January. The pattern aloft will feature strong ridging through the western U.
1030 AM EST Tue Jan 24 2017 Mild high pressure will build into the area in the wake of the deep low pressure system lift northeast up the northern Mid Atlantic coast.
920 AM EST Tue Jan 24 2017 Scattered light rain and snow will diminish through the afternoon as low pressure exits toward New England.
637 AM EST Tue Jan 24 2017 High pressure will build into the area today and tonight, then prevail through Wednesday.
Brief ridging will result in dry conditions today across central Indiana.
This will result in an increase in moisture, and warmer daytime temperatures as H85 south-southwest flow develops. Have added 20% for showers across the northeastern areas where moisture remains the highest covering mainly the Victoria Crossroads region and south toward the coast and across the gulf waters. The front will quickly push through the region, with a cooler airmass building in and breezy northerly flow developing in wake of the front, with strong offshore flow developing across the waters. Next shot of rain will be over the weekend, as isentropic upglide along a coastal trough and weak upper level support combine with sufficient moisture.
A cold front will move through during the day on Wednesday and into Wednesday night, with the highest pops expected late afternoon through Midnight.
Will continue to keep the higher POPs in the far south along with best accumulations. Some light snow showers have entered our southwestern counties as an inverted trough starts to nose into southern ND. Highs will again be a degree or two cooler than yesterday in the 20s to low 30s. Tonight, the main upper low to our south will be headed off to the east. Think the system will bring mostly flurries but will keep the low chance chance for snow spreading from the northwest CWA eastward overnight. Winds will pick up on the backside of the low pressure system to the south, but should stay below 15 kts overnight.
The low will spread east today. Ahead of the low across southeastern Kansas and the Missouri Ozarks, southerly winds will occur ushering warm temperatures as highs warm into the 60s. Cooler conditions will spread into the area bringing temperatures closer to seasonal norms with highs in the upper 30s to the lower 40s and lows in the 20s. An upper level trough will extend out of the Great Lakes into the south Plains behind the front from mid week into the weekend. The gusty winds will occur in response to low pressure pushing across the Plains towards the area today. Tonight into Wednesday morning the low pressure and an associated cold front will push through the area. Winds will weaken as the low moves through the area and switch to the west behind the front.
Otherwise, today will feature cloudy skies with highs generally in the lower 40s. Low pressure will move into the region Wednesday bringing chances for rain showers and milder temperatures in the mid 40s to lower 50s. Relatively benign weather on tap for today as stout mid/upper level ridge builds over the region downstream of ejecting western CONUS longwave trough and associated jet streak. This will keep diurnal ranges in check with highs only in the low to mid 40s. Better chances for precip for the entire CWA arrive Wed night as core of highly elongated/positively tilted trough swings through our area along with associated uptick in low/midlevel convergence and decreasing stability with colder air aloft.
546 AM CST Tue Jan 24 2017 High pressure will move east of the area this afternoon. Today Through Wednesday Night High pressure continues over the area this morning. and the ridge axis is now approaching the Mississippi River. A warm front moving through the state today will bring temperatures well above normal, with highs in the lower 60s to lower 70s. A weak cold front then moves through Wednesday mainly in the morning. Much cooler temperatures will be noticed behind the front Wednesday night.
A large upper level trough continues over the western United States with most its storm energy south and east of the Pacific Northwest. Meanwhile an upper level ridge is approaching the West Coast which is beginning to place the Pacific Northwest under a northerly flow.
354 AM MST Tue Jan 24 2017 The forecast area experienced a lull in snowfall overnight as satellite showed the occluding center of the storm over central Wyoming as of 10Z and its associated cold front east of the Continental Divide. Meanwhile, in the mountains the combination of steep lapse rates and orographic lift provided by west to northwest winds is expected to continue to bring snow to the high country. In the wake of the cold front temperatures will be below normal through midweek.
1054 AM EST Tue Jan 24 2017 Scattered light rain and snow will diminish through the afternoon as low pressure exits toward New England.
Light snow showers will continue for most of the week as low pressure hangs over the Great Basin. High pressure and drier conditions will dominate by the end of the week, as very cold air seeps into the Silver State.
and Wednesday The main forecast concern is headlines and snowfall amounts with the incoming low pressure system tonight into Wednesday. A weak ridge of high pressure was edging eastward into WI early this morning. Expect generally quiet weather today, as the weak ridge of high pressure moves through. With the nor'easter heading up the east coast and having a blocking influence on upstream systems, it's not surprising that models continue to delay the precipitation arrival with the low pressure system approaching from the central plains. At onset, it appears that pcpn type will be drizzle/freezing drizzle, as moisture is quite shallow, and there is little or no ice in the saturated layer. The best snows will occur across central and east central WI late tonight into Wednesday morning, as the surface and upper lows arrive.
Main changes was to keep the freezing fog through the morning. Considering late trends, observations, and 12z LBF sounding, took rain out of the weather types and made it a mixture of freezing rain, sleet, and snow. The upper low over the northern Rockies will move across the northern plains today. Low clouds and areas fog/freezing fog have been developing along and north of the warm front overnight. Light precipitation will be possible along and north of the track of the low.
332 AM PST Tue Jan 24 2017 The large cold low pressure system moving inland through the western states will bring one more round of more significant showers and isolated thunderstorms with small hail today.
/Issued 255 AM EST Tue Jan 24 2017/ Quiet weather in store today as a weak ridge of dry high pressure drifts over the area by days end. A weak cold front is forecast to move to the TN valley late Wednesday with increasing clouds expected for mostly the n and w cwa and small chances for late day showers over the far nw.
317 AM MST Tue Jan 24 2017 The upper low over the northern Rockies will move across the northern plains today. Low clouds and areas fog/freezing fog have been developing along and north of the warm front overnight. Light precipitation will be possible along and north of the track of the low.
Conditions are on the verge of improving well into IFR as high pressure continues building eastward from the midwest. Upstream ridging in advance of the wave emerging over the front range this morning will eventually shunt the moisture axis east 18- 21z and shut down forcing bringing an end to rain and giving way to overcast low clouds as the subsidence inversion strengthens and traps low-level moisture. Clouds and rain will keep temps muted around 40 degrees, warmer than average but less than would be otherwise suggested by the warm airmass over the region. Ongoing isentropic ascent will support the best chance of stratiform rain across the far north while a rumble of thunder or two in the warm sector is not out of the question along the pre-frontal trough on Wednesday afternoon.
933 AM EST Tue Jan 24 2017 Low pressure off of New Jersey will move up the coast through the day. High pressure in the central plains will briefly ridge into the region on Tuesday.
934 AM EST Tue Jan 24 2017 Ridging remains in place over the Florida peninsula this morning as a trough/closed low continues to move off the mid-Atlantic region. At the surface, the pressure gradient will continue to lessen between high pressure over the southern Gulf of Mexico and parting low pressure well to our northeast, so we will still have northwest winds through the day, but not as gusty as we had yesterday. Otherwise, with high pressure building, expect a dry and mostly sunny day. After today, high pressure will remain over the area for a couple of days, with no additional headlines expected.
533 AM CST Tue Jan 24 2017 A broad upper trough will be accompanied by a Pacific cold front as it moves east across the CONUS over the next few days. /ISSUED 352 AM CST Tue Jan 24 2017/ Another fast moving upper trough will swing through the Central Plains today resulting in a deepening surface cyclone over Kansas and increasing southwest winds across our region. By late tonight as the main upper trough continues to move east. a cold front will move through North Texas.
Isolated snow showers are possible over the higher terrain today. Through Wednesday night The main upper low energy has shifted east of the region with drier air filtering in behind it.
TFJ A broad upper low is extending from the Great Basin northward into the Canadian prairies this morning. Portion of the low in the Great Basin will be moving east into the central plains through today. Mid level moisture and weak vorticity along the Canadian border will continue to produce occasional light snow showers today through Wednesday with a colder high pressure over sliding over northwest Montana.
1038 AM EST Tue Jan 24 2017 Deep layer NW flow and a very dry atmosphere will allow for sunny skies into the afternoon and highs reaching the lower to mid 70s.
Starting shortly after 00Z Wednesday, a cold front will work its way through the region. Respectable warmup is expected today due to compressional warming from downsloping west and southwest winds, in spite of passage of Pacific cold front. Polar cold front passes tonight, holding maximum temperatures on Wednesday mainly in the 40s.
418 AM CST Tue Jan 24 2017 Flurries will quickly taper off this morning as mid-level cyclonic flow moves off to the north and east and the atmospheric profile dries out in the low levels. Most of the day today looks to be quiet as some subtle mid-level ridging and negative vorticity develops at the 500 mb level. As low pressure continues to move northeast Wednesday night, the flow will become northerly from the surface on up into the upper levels.
Not much change in the thinking this shift, and the forecast for today is largely just an update from the previous with the exception that temperatures will be warmer across the Red Hills portion of our forecast area. There is no indication of any arctic airmass coming this way with positively-tilted ridging into the Canadian Rockies leading to sustained downslope lower tropospheric momentum up and down the Rockies from Colorado to Alberta.
434 AM MST Tue Jan 24 2017 The forecast area experienced a lull in snowfall overnight as satellite showed the occluding center of the storm over central Wyoming as of 10Z and its associated cold front east of the Continental Divide. Meanwhile, in the mountains the combination of steep lapse rates and orographic lift provided by west to northwest winds is expected to continue to bring snow to the high country. In the wake of the cold front temperatures will be below normal through midweek.
429 AM MST Tue Jan 24 2017 The upper low over the northern Rockies will move across the northern plains today. Low clouds and areas fog/freezing fog have been developing along and north of the warm front overnight. Light precipitation will be possible along and north of the track of the low.
/issued 418 PM CST Sun Jan 22 2017/ Upper level closed low pressure system continued to spin over extreme Northeast Louisiana and Southeast Arkansas with its center over Central Mississippi. Temperatures will also warm into the week as the surface and ridge of high pressure move East allowing more southerly winds.
Models are in much better agreement with the position and movement of the low pressure system with only some slightly differences in timing and how far south the low develops. the cold front will provide enough llvl lift for snow shower activity on Monday and Monday evening.
Will have some lingering shower chances this afternoon and tonight, but the main story for the short term is gusty north northwest winds and considerably cooler air. Our best chances of rain will be in southern portions of southeast Missouri and the Purchase Area late this afternoon into the evening, as another band attempts to push north while the upper low rotates through Mississippi and Alabama.
Based of radar trends precipitation bands will mainly affect the central and eastern Midsouth counties tonight as the upper low continues to track across Alabama. and lowered them to the northwest of Jonesboro and along the lower Tennessee River Valley. In addition significant cloud cover is keeping temperatures warmer than forecasted this evening. WSR-88D radar trends show an expansive and nearly stationary area of light to moderate rain over much of north Mississippi and Eastern Arkansas associated with a surface boundary and upper level low. Latest water vapor imagery shows an impressive 540mb upper level low centered over the ArkLaMiss. Within our regime, on the northern periphery of the low, mostly stratiform rain and cloudy conditions are occurring over the Mid- South. As the upper level low departs off to our southeast this evening, a cold front will swing through.
A strong low pressure system will bring widespread rain and snow to the region along with areas of strong winds through Monday.