Aikyam-Lab/Synoptic-Bench huggingface dataset:
622 PM MST Wed Dec 7 2016 Added areas of light freezing drizzle to the forecast for east central and southeast areas late tonight into Thursday morning based on recent model forecast soundings. Also added some patchy freezing fog to the forecast around Las Vegas late tonight. 00Z TAF CYCLE Aviation impacts to focus over eastern NM tonight as low clouds & patchy FZFG/DZ develop behind an arctic cold front. A strong cold front will continue to move south through central New Mexico overnight.
Patchy ice possible on bridges and overpasses by Thursday morning as a strong arctic front and light precipitation move into the Tricky forecast for tonight and tomorrow with a mix of precipitation possible. Temperatures are already at or below freezing in the Panhandle. Temperatures will quickly drop and fall to around freezing before sunrise. Precipitation will likely begins liquid, with light freezing rain or freezing drizzle overnight. as temperatures stay below freezing through the morning, some light accumulation of ice may develop on bridges, overpasses, and elevated surfaces.
Cold front is currently positioned up across the midwest and stretches from just nw of Chicago to srn KN. Meanwhile, at the time of the fropa, very weak mid level troughing will be in place with the axis located upstream. Clearly, models show the higher moisture levels across the south.
644 PM CST Wed Dec 7 2016 Canadian and NWS radars show the band of snow involved with the blowing and drifting snow is moving south with the surface pressure trough. The LAMP guidance is the preferred source for winds as it is the highest and matches observations the best.
Strong Cold Front to Bring Sharply Colder Air Tonight. High pressure building into the region today will get reinforced as a broad upper trough axis swings through tonight and Thursday.
Cold temperatures continue on Thursday night while lee troughing develops east of the Rockies, shifting northerly surface winds to the south.
Low level warming and resulting drying had broken up most of the low clouds this afternoon. This should cause the low clouds to increase again later tonight, with flurries increasing again. As a last weak lobe rotates around the retreating Ontario upper low, a band of warm advection and frontogenesis centered around 900mb will approach. The bare ground and mixing will continue to result in warmer temperatures than we would see with any snow cover in this arctic air. Could see it getting a bit warmer than that, though much of the area may have more cloud cover than today.
High pressure noses into the area from the north tomorrow bringing clear skies overhead.
601 PM CST Wed Dec 7 2016 For the 08/00z TAFs, scattered showers are expected to develop and affect most terminals by 08/06z as a cold front moves across the area. /issued 251 PM CST Wed Dec 7 2016/ Tonight will mark the arrival of a strong cold front that will bring a modified arctic airmass down in the Lower Mississippi Valley.
750 PM EST Wed Dec 7 2016 Weak high pressure over the Carolinas will weaken and shift east tonight. An arctic cold front will move through the area Thursday, followed by an expansive arctic high for the weekend. Lows generally should bottom out in the lower to mid 40s as the clouds thicken up. Any light warm advection driven precip Thursday morning will shift east and may consolidate or become a little more showery as fgen strengthens and the cold front sweeps across the area. Highs should reach the low to mid 50s. Cold air tap will be turned on Thu night as an Arctic ridge builds south and east out of the central plains.
A few snow showers will persist this evening and overnight, mainly across northwest Minnesota, as the upper low continues to very slowly propagate further away from the area. Additional accumulations should be no more than a couple of inches at the high side over main NW MN.
/issued 601 PM CST Wed Dec 7 2016/ For the 08/00z TAFs, scattered showers are expected to develop and affect most terminals by 08/06z as a cold front moves across the area.
High pressure aloft will gradually build northeast into the forecast area during the period. Moisture will gradually increase as the high pressure ridge builds into the area, bringing mainly high clouds to the area on Thursday, but a few snow showers will likely move into the Southwest Montana/Northeast Idaho border area. Warmer air will start to move into Southwest Montana, pushing highs into the 10 to 15 above range, while cold air will keep highs across North Central Montana in the single digits above and below zero.
Higher level cloud shield approaching from the southwest ahead of a warm front moved into portions of SE Oregon.
However, given the cold air under the ridge currently upstream, have still trended twd the coolest guidance for Thurs.
The cold front is still on track to enter the northern CWA after midnight and clear the southern CWA before daybreak. However forecast models have come in warmer with the warm nose between 800-700mb, beneath the cloud base, but also drier. We anticipate ground temperatures, including elevated structures, to remain just above freezing and combined with the light QPF amounts do not expect any significant impacts.
Most of the warm avective cloud cover will not produce much snow through tomorrow afternoon but definitely could be some isolated showers along the higher mountain tops.
652 PM EST Wed Dec 7 2016 As an upper level low pressure system moves eastward across southern Canada, arctic air will invade the region over the next few days.
616 PM EST Wed Dec 7 2016 An approaching cold front will move through the forecast area Thursday.
729 PM EST Wed Dec 7 2016 Weak high pressure extends into the area tonight.
The old boundary will finally begin to push southward during the day tomorrow as strong high pressure builds in over the area. So, in the highest elevations across northern GA, temps may remain nearly steady from overnight min values.
1042 PM EST Wed Dec 7 2016 An approaching cold front will move through the forecast area Thursday.
A cold front will spread VFR ceilings across the area tonight and Thursday morning, with northwest surface winds becoming gusty during the daylight hours.
913 PM EST Wed Dec 7 2016 High pressure over the area tonight ahead of a cold front that will move through the Mid-Atlantic Thursday morning and midday.
With arctic high pressure in place, temperatures aren't expected to get out of the 20s on Thursday.
A potent polar air mass will plunge into the base of a trough rotating through the northeastern U.
A ridge of cold Arctic high pressure will nose across far western SD overnight.
940 PM EST Wed Dec 7 2016 As an upper level low pressure system moves eastward across southern Canada, arctic air will invade the region over the next few days.
1036 PM EST Wed Dec 7 2016 An approaching cold front will move through the forecast area Thursday.
851 PM CST Wed Dec 7 2016 Expect periods of flurries tonight and snow showers Thursday as a trough swings across southern Wisconsin from the northwest. A dusting is possible mainly Thursday with the trough axis. Expect MVFR cigs and periods of flurries tonight and snow showers Thursday as a trough swings across southern Wisconsin from the northwest. A dusting is possible mainly Thursday with the trough axis.
520 PM CST Wed Dec 7 2016 Sprawling ridge of high pressure extending from western Canada to the Ohio River Valley will dominate the weather across central Illinois for the next 24 hours. W/NW winds around the periphery of the high will continue to bring colder air into the region, allowing lows to drop into the teens and lower 20s. an upper trough currently over the Upper Midwest will pivot southeastward into central Illinois by Thursday afternoon.
Most of the warm advective cloud cover will not produce much snow through tomorrow afternoon but definitely could be some isolated showers along the higher mountain tops.
Arctic cold front currently noted through the Texas panhandle and just moving into North Texas. As high pressure builds in behind the front very strong winds will develop with a tightening pressure gradient. Expect cloud cover to preclude any wide spread freezing conditions. A few cold prone areas may drop to around freezing briefly.
Canadian and NWS radars show the band of snow involved with the blowing and drifting snow is moving south with the surface pressure trough. The LAMP guidance is the preferred source for winds as it is the highest and matches observations the best.
535 PM CST Wed Dec 7 2016 Skies will clear tonight as arctic high pressure builds into the central plains from the northwest.
Meanwhile, a broad mid- upper level low drifts east, south of Hudson Bay.
654 PM EST Wed Dec 7 2016 Weak high pressure persists tonight.
A cold front moving through the area today will bring cooler temperatures and variable cloudiness.
Current surface analysis shows strong low pressure now over southern Ontario, with 1045 mb high over southern Alberta. Large upper level trof now covers much of Canada and the United States, with strong jet stretching from the Pacific NW to the Southern Plains to the northeast US. However, there will be less wind across the area as the high moves into eastern MT. Lows Thursday night will drop to near or below zero again as the high moves across ND.
This quiet weather is due to the zonal flow that will continue over the area as the low pressure systems moving onshore from the Pacific remain well north of the area.
850 PM EST Wed Dec 7 2016 Local surface pressure pattern remains rather amorphous this evening with a ridge axis nudging in across the north and a weak trough to our south.
High pressure will build into the area at the surface tonight but with a low level short wave and some moisture trying to move in from the west expect low cloudiness to move into the Altamaha River area and coastal Georgia overnight.
With this moisture freezing drizzle is possible, but doubtful, since the low level temps should be cold enough for dendrite growth. Main trough axis is shifting eastward into the Plains. leading edge of strong cold front moved through KAMA around 18z with strongest winds noted across the western half of the CWA. Can't rule out some light freezing drizzle before the profile cools to around minus ten degrees later tonight converting any precip to flurries.
600 PM MST Wed Dec 7 2016 Current surface analysis shows strong low pressure now over southern Ontario, with 1045 mb high over southern Alberta. Large upper level trof now covers much of Canada and the United States, with strong jet stretching from the Pacific NW to the Southern Plains to the northeast US. However, there will be less wind across the area as the high moves into eastern MT. Lows Thursday night will drop to near or below zero again as the high moves across ND.
458 PM MST Wed Dec 7 2016 00Z TAF CYCLE Aviation impacts to focus over eastern NM tonight as low clouds & patchy FZFG/DZ develop behind an arctic cold front. A strong cold front will continue to move south through central New Mexico overnight.
1028 PM EST Wed Dec 7 2016 An approaching cold front will move through the forecast area Thursday.
534 PM EST Wed Dec 7 2016 A trough of low pressure will result in a return to cold temperatures and periodic snow showers through the end of the week.
1009 PM EST Wed Dec 7 2016 Weak high pressure extends into the area tonight.
537 PM CST Wed Dec 7 2016 Updated for 00Z aviation discussion 00Z TAF discussion: Mostly MVFR ceilings will be the rule at least overnight ahead of a cold front that will sweep through the region tonight into Thursday morning. Clouds will continue to be a major facet to the forecast for another day, but a rather big time (temperature-wise) secondary cold front coming through tonight through tomorrow will finally work to start gradually sweeping clouds south of the region by tomorrow afternoon into tomorrow evening.
Both Thu-Fri daytime highs will struggle their way toward/around the freezing mark. The main weather concern for the weekend will be a low pressure center tracking to our north and west.
The cold front that pushed through the area yesterday morning has stalled out south of Interstate 10 in southwest Texas, curving back to northeast Texas at the time of this AFD. As the high clouds clear off to the east this morning, any low clouds should mix out a bit leaving partly cloudy skies. As the morning wears on, shallow upper ridging will shove east ahead of improving diffluent flow aloft preceding the trough.
555 AM CDT Tue Apr 11 2017 A cold front has cleared the entire area early this morning, ending any precip chances.
332 AM EDT Tue Apr 11 2017 Early morning analyses showed a low pressure system over the western Great Lakes states and associated front extending southwestward into Texas. With the low lifting out into Canada, along with height falls off the west coast and downstream height rises over much of the CONUS, expect this front to dissipate over the next couple of days far to the north of Florida. Otherwise high pressure is in control over the western North Atlantic and this will continue for much of the week.
High pressure will persist near Bermuda through tonight. A weak cold front will cross the area late tonight into Wednesday morning.
A low pressure system is analyzed over the Midwest with a trailing cold front making its way southward through the Dallas/Fort Worth area. Tuesday morning, there is low confidence on the potential MCS making it into the Lower Rio Grande Valley, so have not adjusted the PoPs for these areas much at this time.
623 AM EDT Tue Apr 11 2017 High pressure will continue to extend into Eastern NC from the Atlantic through tomorrow.
/Issued 408 AM CDT Tue Apr 11 2017/ A cold front was positioned from Southwest Texas to the far southeast corner of Oklahoma through Central Arkansas and Southeast Missouri and then extended northeast into Michigan early this morning. mainly near the Red River before the cold front finally pushes far enough southeast of the region. increasing low level moisture from south to north along with warmer temperatures are forecast Wednesday afternoon.
/issued 415 PM CDT Mon Apr 10 2017/ A quiet morning has quickly transitioned into an active afternoon with increasingly unstable conditions expanding eastward ahead of a cold front advancing across east central Texas and beginning to near our northeast Texas zones along I-30 and north into southeast Oklahoma.
154 AM EDT Tue Apr 11 2017 High pressure remains centered off the Mid Atlantic coast through mid week. A cold front crosses the region Wednesday.
321 AM CDT Tue Apr 11 2017 An area of low pressure passing north of the region today will bring a few passing clouds to this CWA.
At the surface, high pressure has settled in right over central NE, bringing light/variable to calm winds to the CWA. At the surface, the area of high pressure currently in place over the area will slide off to the east through the day. Southerly return flow on the backside of the high works in, with speeds topping out generally between 10-15 MPH (highest speeds in the west).
408 AM CDT Tue Apr 11 2017 A cold front was positioned from Southwest Texas to the far southeast corner of Oklahoma through Central Arkansas and Southeast Missouri and then extended northeast into Michigan early this morning. mainly near the Red River before the cold front finally pushes far enough southeast of the region. increasing low level moisture from south to north along with warmer temperatures are forecast Wednesday afternoon.
500 AM CDT Tue Apr 11 2017 (Today and Tonight) Most of the area will be dry today with slightly cooler temperatures behind the front that went through the area yesterday.
This disturbance comes through Tuesday night with some mountain snow showers and a few light showers/sprinkles across the lower elevations (especially near the mountains/foothills).
327 AM CDT Tue Apr 11 2017 A persistent upper trough over the eastern Pacific, or western U.
/Issued 521 PM CDT Mon Apr 10 2017/ For tonight into most of Tuesday, dry weather will continue as semi-zonal flow to weak upper level ridging prevails.
417 AM CDT Tue Apr 11 2017 Cold front will continue to push off to the south and east further away from the CWA during the day today. These low clouds combined with modest cold advection aloft yield high temperatures today about 15 degrees cooler than yesterday and leaned aob the slightly cooler MET guidance for today's high temperatures. High pressure will then dominate the sensible weather for the tonight period as it will be centered across western Illinois early this evening. Lows in the low to mid 40s seem reasonable but again leaned cool given the synoptic setup and upstream readings.
A warm front was approaching the western Dakotas from Montana. Widely scattered light showers were associated with the warm front in central Montana.
A weak coastal trough will produce a few clouds. Coastal areas will be cooler during the afternoon and warmer at night due to the influences of the warmer water.
255 AM CDT Tue Apr 11 2017 A cold front has cleared the entire area early this morning, ending any precip chances.
A cold front will bring showers and thunderstorms to the area tonight.
A developing WAA regime takes hold which erodes the lingering influence of low level thermal trough. Temps will get a boost over the chill of Tuesday though onshore flow will keep lakeside areas on the cooler side.
329 AM EDT Tue Apr 11 2017 High pressure remains off the Mid Atlantic coast as low pressure tracks across the Great Lakes. A cold front crosses the region Wednesday.
440 AM EDT Tue Apr 11 2017 High pressure ridge across the area will remain in control of the region today with a weak cold front arriving Wednesday.
A cold front was pushing into west-central Illinois at mid- afternoon. High pressure will start building into the area for Tuesday behind the front. Cooler conditions are expected, but temperatures will still be near normal for early-mid April. The drier air mass associated with the high will also return quiet weather to the area.
438 AM EDT Tue Apr 11 2017 High pressure will linger over the western Atlantic through midweek.
Flat ridging aloft will continue through the night with some patchy thing cirrus over the southern half of the cwa. This will allow for warming conditions, and expect max temps tomorrow will run 6 to 8F warmer than today.
Gusty north northwest winds associated with the strong pressure gradient across the central high plains region today will decrease after sunset as the area of high pressure moves in. As the high continues further east during the day on Tuesday, low pressure begins to deepen over the central Rockies and front range area by late in the day. Light winds overnight with mostly clear skies and dewpoints in the upper 20s to lower 30s will allow early morning lows to approach freezing across portions of the forecast area. South winds on Tuesday will help push the colder air out of area and bring high temperatures up into the lower 70s.
331 AM EDT Tue Apr 11 2017 We'll see one more unseasonably warm day before a cold front over Quebec drops slowly southward across the region later today. Low pressure will move east along this boundary on Wednesday. High pressure with drier and cooler air follows this low for the latter part of the week, with temperatures dropping closer to normal.
High pressure will settle in over the region tonight, and with temperatures not rising much above the mid 30s to lower 40s range today and skies gradually clearing overnight, will see a chilly night. Lows in the lower the mid 20s will be common. The high begins to get pushed east on Tuesday, with the beginnings of warmer air moving in. High temperatures on Tuesday will range from the mid 50s to the lower 60s.
A weak area of high pressure will break down this evening as the next round of systems approach from the west.
330 AM CDT Tue Apr 11 2017 Clouds increased over the Mid-State overnight, in advance of a cold front that was located over southern Illinois and southeast Missouri at 08z. As cold front drops into northern parts of the Mid-State today, showers and thunderstorms will become widespread over northwestern and north-central areas, trending mainly scattered activity in areas further east and south. Cold front weakens tonight, as high pressure, over the Ohio River Valley bridges across it--putting out entire area in light northerly flow by 06z. Upper level ridge builds over the southeastern United States into the middle and latter part of the week.
150 AM EDT Tue Apr 11 2017 Low pressure over the Central Lakes will track across the Eastern Lakes Tuesday. The trailing cold front will push across the forecast area Tuesday morning. High pressure will build over the area Wednesday. Low pressure over UP of Michigan with a secondary low over SRN WI. Secondary low will track across into the Central Lakes tonight with the trailing cold front moving across the Western half of the forecast area overnight. Temps will slowly drop later in the day as the cooler air moves over the area.
Strong storms in northeast Mexico have followed the instability axis over the higher terrain where convective inhibition is weak.
344 AM EDT Tue Apr 11 2017 High pressure moving east out of the area as frontal boundary moves into the region from the MS river valley. 01 A weak cold front is expected to be across the area Wednesday night and is expected to dissipate.
A dry subsident air mass under the deep layered ridging will keep rain chances out of the forecast with pleasant dry conditions expected through the period. Highs on Tuesday with run a few degrees above normal with highs climbing into the lower 80s along the coast, and mid 80s inland.
No major changes made to previous package, with the exception of a TEMPO MVFR CIG at KBPT were latest obs indicate the low clouds may be developing/spreading in faster than previously anticipated. A cold front extending from near Dallas southwest across central Texas is producing a large area of strong thunderstorms. GOES-R imagery suggests some erosion of this lower cloud layer, so will indicate scattering into VFR but continue to monitor trends. /issued 425 PM CDT Mon Apr 10 2017/ The region remains between high pres off the eastern seaboard and a cold front/lower pres acrs OK into north TX, and this is maintaining breezy southerly winds acrs southeast TX and southwest LA. Aloft, the upper ridge axis has shifted east with winds bcmg more southwesterly in advance of a low amplitude trough over the southern plains.
348 AM EDT Tue Apr 11 2017 High pressure off the coast will remain in place today. A weak cold front slowly crosses the area tonight and Wednesday.
407 AM EDT Tue Apr 11 2017 Cooler temperatures can be expected today. High pressure will slide into the region tonight into Wednesday with skies gradually clearing.
A weak cold front will push into the area late today and tonight.
241 AM CDT Tue Apr 11 2017 Current conditions across the midsouth were fairly quiet for the moment as today's cold front begins to enter the far northwest counties. the Midsouth will remain under low amplitude ridging through the period.
Under variably cloudy skies and northeast to east winds of 10 to 20 mph, temperatures are mainly in the lower 70s along Keys communities. Surface wise, an extensive western Atlantic ridge axis is draped across the extreme southeast United States. A mid and upper level short wave trough over Texas will slide eastward and slowly weaken as it traverses the Gulf of Mexico.
Clouds will continue to clear out across the western Nebraska Panhandle through the late aftn as the upper level trough pushes well east of the CWA.
Overnight lows tonight will be some 10 to 15 degrees warmer than last night with many of the lower valleys climbing back above freezing. While skies will still be mostly clear the significant warming is due to the warmer temperatures aloft with 700mb temperatures sitting around 6 to 8 degrees C warmer than last night. Highs tomorrow afternoon will also jump above normal with some valleys in southeast Utah and western Colorado climbing to the low to mid 70's.
High pressure then should build into the Midwest and move north of our area Wednesday.
622 AM EDT Tue Apr 11 2017 A weak cold front slowly crosses today into Wednesday morning.