Aikyam-Lab/Synoptic-Bench huggingface dataset:
A cold front remains poised just north of the forecast area this evening and will push across through the overnight hours. Cooler and drier airmass to filter in behind the front. /issued 327 PM CST Wed Dec 21 2016/ A cold front currently stretches form Eastern Iowa to Eastern Kansas. However, slightly cooler temperatures will occur behind the front. Expect highs ranging from the mid 40s to the lower 50s. High pressure will briefly build back into the area by Thursday afternoon into Thursday Night. However, the high will quickly shift east Friday morning allowing winds to turn around to the south.
356 AM CST Thu Dec 22 2016 Today will be much cooler behind a cold front before we see moderating temperatures heading into Christmas weekend. A cutoff upper low over the Pacific has begun to lift north and is spreading mid and high level moisture across the region this morning. Temperatures continue to fall behind a southward moving cold front. The freezing line is still north of our area currently, but may dip down to Tatum by sunrise. Strong gap winds also continue behind the cold front at Guadalupe Pass, but have remained near or below warning criteria. Temperatures will begin to moderate Friday as southerly flow returns and another upper trough develops along the West Coast.
343 AM EST Thu Dec 22 2016 Low pressure will track across the area on Today. High pres is expected to ridge across the area on Friday. Low pressure is currently moving to the north of the state. A low pressure system will approach from the west today. The low center will intensify late today and tonight as it moves eastward through the Gulf of Maine, however the intensification will be too slow to produce significant amounts of snow across the State so only light accumulations are expected. High pressure will build to the southwest late tonight. Ridge axis wl be acrs the area for Friday with sfc bndry to the north. S/wv ridging builds acrs state thru early Sat mrng bfr beginning to break down as upr lvl trof appchs.
Low temperatures tonight will remain above freezing. Clouds will linger into tomorrow as a dry cold front moves into the region. so no freezing fog threat tonight for all areas. Models agree on an approaching cold front helping to maintain some cloudiness tonight and early on Thursday along and ahead of the front. clearing skies and a cooler airmass will bring freezing temps back to far north GA Thursday night. High pressure across the CWFA at the beginning of the period will begin to shift east across the Mid Atlantic states on Friday, building a wedge down the spine of the Appalachians. but begin to erode by the first of the week as a cold front approaches from the west.
Upper air analysis last evening showed a broad trough over the southern part of the country with a low off the coast of the Baja Peninsula. At the surface, a cold front was stretched from Dallas to San Angelo to Pecos. At the start of this period, the cold front will be near our southern border and will move away to the south. Drying will be short lived as the front will come back northward as a warm front. During this period the upper low off the Mexican coast will open and push to east.
404 AM EST Thu Dec 22 2016 A weak and dry cold front will move through the forecast area late this afternoon and evening. High pressure behind the front will build north of the forecast area tonight.
350 AM CST Thu Dec 22 2016 A cold front will work southeastward across the region this morning, with warmer and more humid air and fog possible until the front passes.
1216 AM CST Thu Dec 22 2016 Mild pacific high pressure encompassed much of the western US, with low pressure over central/northern Canada moving east. West to southwest winds across western and central ND ranged from mainly 10 to 20 mph, and were mixing the lower atmosphere and keeping temperatures in the upper teens and 20s. Upper level analysis places ridge over the northern Rockies with trough over the upper midwest. Otherwise, a quiet night is expected as upper level ridging builds into the area. quiet weather continues with pleasant temperatures as ridging remains over the area.
A cold front approaching from the north is forecast to move through the region between 12Z and 15Z resulting in a wind shift to the N/NNE.
1130 PM CST Wed Dec 21 2016 Initial forecast concern will be closed cyclone off the coast of Baja California as it tracks northeast over the next 36 hours. Clouds will be on the increase during the day on Thursday ahead of this system, but with bare ground and a southwest wind we should see highs again climb into the lower to middle 40s despite the clouds.
302 AM CST Thu Dec 22 2016 Surface ridging will slide eastward today, prompting a return to a southwesterly low level flow. Snow accumulation overnight will be light, generally a couple of tenths, perhaps up to half an inch through the lower Big Sioux and MO river corridors. Temperatures on Friday also likely to get up to or a little above freezing so roads will remain on the warmer side.
High pressure remains over the Southeast with weak low level winds. Lows will be in the low 40s in the eastern half of the region and high 40s in the western half where cloud cover is greater. The cold front associated with this system is currently over the upper and mid Mississippi valley and the central and southern Plains. This dry cold front will cross through our region Thursday night, bringing an increase in cloud cover, but likely no rainfall. Behind it, deep layer high pressure will move into the southeast with a cooler, drier air mass at the lower levels and zonal flow aloft Thursday night and Friday. High pressure will zoom eastward however, with southerly flow returning warmer, moister air by Friday night.
402 AM EST Thu Dec 22 2016 Temperatures will climb above freezing and into the middle 30s again today but will drop back below freezing tonight with Lows in the upper teens to lower 20s.
A cold front is now passing through West Central Texas shifting winds to the north at all terminals. Southwest winds will shift to the north this evening as a cold front moves through the area. The cold front is expected to be through KABI within the next few hours with the front through all terminals by 05Z. Tonight, a cold front will move through the area. Temperatures will fall into the 30s across the CWA, but temperatures will be noticeably cooler tomorrow. Temperatures will be cooler Thursday behind the cold front, with highs ranging from the upper 40s north of I-20 to the mid 50s along the I-10 corridor.
Otherwise, a weak cold front currently analyzed across central Texas will slowly pass through Deep South Texas and the Rio Grande Valley today, producing scattered patches of light rain.
349 AM CST Thu Dec 22 2016 The current surface map has a large high pressure centered over the central plains and a ridge into MN and northwestern WI. Much drier air associated with this high has been steadily eroding clouds from west to east. Upper level ridging and warm air advection will already begin in the wake of this system, with H5 heights building throughout the end of the work week.
320 AM EST Thu Dec 22 2016 Temperatures finally climbed above the freezing mark at DTW (34 degrees), snapping an 8 day stretch below.
Friday will be dry under high pressure. Latest 18Z-21Z model guidance maintains continuity with previous runs that a weak warm front, supported by a broad, open 500 MB trof will move through the Great Lakes tonight and into New England on Thursday. This afternoon and evening, primarily MVFR ceiling bases should develop in the NW cyclonic flow, behind a cold frontal passage.
358 AM EST Thu Dec 22 2016 High pressure over the Carolinas will drift south today, ahead of a moisture-starved cold front that will cross our region this afternoon and evening. High pressure will follow and build overhead through Friday. The passing cold front will usher Pacific high pressure into and across the Appalachians through early Fri, with the center of the 1034 mb over the Virginia's at 12Z Fri. As the center of the high builds E, a brief period of calm will be possible over the Nrn Piedmont just prior to daybreak, with light Nly stirring and continued CAA elsewhere, supportive of lows ranging from the upper 20s over the Piedmont to lower 30s over the Sandhills and Srn Coastal Plain.
High pressure will then bring fair and seasonably chilly conditions Friday. During the late morning/early afternoon period (10 am-2 pm), a surface cold front/trough is progged to cross the forecast area, heralding a wind shift from SW-NW and commencing cold air advection. After midnight, any residual snow showers/flurries should diminish/dissipate, as the inversion lowers further, owing to an approaching ridge axis from the west. This afternoon and evening, primarily MVFR ceiling bases should develop in the NW cyclonic flow, behind a cold frontal passage.
A large area of low pressure off the Baja Coast will continue to increase moisture over Arizona tonight with mild temperatures. A large area of low pressure off the Baja Coast will continue to increase moisture (from the sub tropics) and mostly rain showers over Arizona tonight. Over the next 36 hours, this low will head to the northeast and cross Arizona. The main forcing for upward motion and the highest moisture values will be during the day Thursday.
359 AM CST Thu Dec 22 2016 A cool area of high pressure will continue to drift southeast, placing Oklahoma/north Texas into a return-flow pattern later today. The western/northern parts of the rain area tonight will reach areas that may be at/below freezing. As a result, there is a possibility of freezing rain, although accumulations should be minimal, if any.
Today Through Friday Night An upper low pressure system is off the coast of southern California. As the upper low moves into the southwest U. The low opens into a trough overnight and moves through New Mexico, then through Texas on Friday. Cloud cover is decreasing across south Arkansas this morning as a cold front works through the state.
Ahead of the cdfnt will be plenty of clouds which should keep temps above freezing (upper 30s to lower 40s). Fairly quiet weather is expected on Thursday even with a weak cold front approaching from the northwest. This cold front should arrive between 6AM-9AM in the morning with a surface northwest wind and pressure rise the main indicators of its arrival. Temperatures should be about 3-5 degrees cooler for daytime highs after this front's arrival with a northwest (cooler) to southeast (warmer) gradient as light southerly flow overnight transitions to light northwest winds. However, it does appear that the ridge that is forecast to be over the Southeast is relatively stronger--which would act to slow the progress of the trough/front.
/Issued 918 PM CST Wed Dec 21 2016/ Cold front continues to push through far southeast OK this evening with light north winds in most places behind the front. Cold front, currently located south of a ICT/MCI line will move into northeast Oklahoma shortly with front quickly sweeping south to the Red River by late evening. Upper low currently off the southwest CA coast will begin to lift northeast across the desert southwest on Thursday. It appears that temperatues will likely warm above freezing by the time any significant precipitation develops Friday morning and therefore no winter weather impacts are currently expected.
A nearly dissipated cool front seems to have metamorphosed into a quirky, quasi-stationary mesoscale front, aligning with a serpentine, surface thermal gradient arising from the cooler/drier nocturnal air over the southern Florida Peninsula and the much warmer/moisture Gulf Stream air just offshore the southeast Florida coast and Keys. Persistent gentle/moderate northeasterly breezes off the Florida Peninsula have allowed air temperatures in most Keys island communities to fall into the lower 70s, with slightly drier dewpoint temperatures in the upper 60s. On the large scale, the impressive deep layer mean ridge which has been governing our weather this week has weakened a bit (but remains impressive, centered presently over the western Gulf basin and Texas.
The low level 850mb jet will strengthen overnight. /issued 307 PM CST Tue Feb 14 2017/ SHORT TERM (Tonight through Wednesday Night): The morning cold front has pushed offshore, leaving high pressure in its wake to settle over the region. High temps today were held down in the lower to middle 70s. The next 36 hours will be cooler, with low temperatures tonight in the 40s and 50s, with more 40s than 50s Wednesday night. High temperatures on Wednesday will be mainly in the 60s, slightly cooler than normal for this time of year.
High pressure will bring dry weather and mild afternoon temperatures to the district through Wednesday with night and morning fog in the San Joaquin Valley.
/Issued 400 PM CST Tue Feb 14 2017/ An upper low currently moving into eastern Oklahoma will move east into Arkansas later this evening taking the rain with it. Skies will clear later tonight, allowing temperatures to fall close to the freezing mark in many locations.
Given some narrow dew point depressions, especially in valley locations, looking at the potential for patchy freezing fog to develop. Strong upper ridge of high pressure over the Pacific NW will flatten a bit during the period.
Gusty east winds are expected Wednesday, otherwise dry and warmer conditions the second half of the week. A stronger Pacific storm system will bring a very good chance of valley rain, mountain snow, cooler temperatures and gusty winds this weekend. Dry and warmer conditions are on tap for the second half of the week thanks to high pressure building in from the west. The first will hit the Pacific Northwest along with northern and central California over the next 48 hours before shearing into the front side of a strong ridge extending into southern Canada.
553 PM CST Tue Feb 14 2017 Overall pattern in the upper levels locally puts us within north/northwest flow as a closed slow travels east across the southern Plains and an amplified ridge to the west that is heading our way.
Will maintain a chance for showers and thunderstorms over the south and central Louisiana through the early evening until passage of the cold front.
The northern extent of this precipitation will be determined by how quickly and far south a Great Lakes trough evolves. As colder air infiltrates tonight behind a cold front, light snow may mix in at times. Any accumulations will be confined to the higher terrain of far southeast Kentucky, where up to 2 inches of snow will be possible on top of Black Mountain. It was associated with a storm system over the lower Mississippi Valley. A cold front will move southeast through the area overnight and early Wednesday morning. Forecast soundings do not look particularly favorable for snow showers this time around, with moisture in the low level mixed layer being shallow and potentially not reaching the -10C level.
Will see an active TAF period as a low pressure system pushes across the Southern Appalachian Region.
840 PM EST Tue Feb 14 2017 Quiet WX overnight as a deep hi pres ridge extending from the Bahama Bank to the Yucatan Peninsula retreats into the Atlc ahead of a frontal trof over the wrn GOMex. Low/mid lvl pgrad should remain tight enough to maintain these winds overnight as the frontal trof presses into the GOMex. Deteriorating conds overnight as a deep high pres ridge centered east of the Bahamas drifts into the central Atlc ahead of a frontal trof pushing into the wrn GOMex.
531 PM CST Tue Feb 14 2017 Tonight into Wednesday: An upper low circulation over north-central Texas with a mid- level deformation zone on the north flank, will shift eastward becoming absorbed within a deepening eastern CONUS upper trough.
528 PM CST Tue Feb 14 2017 An upper low was evident via water vapor imagery dropping southeastward towards Lake Superior early this afternoon. A secondary cold front has been sliding south across the region, but the stronger 925 mb cold advection has been farther north through early afternoon. A very transitory cooler air mass behind the cold front will drop across the region this evening and tonight with temps falling back closer to seasonal averages. Winds will subside heading into Wednesday as surface ridging passes over the area. Mid/upper level ridging will spread into the Northern Plains and Upper Midwest and remain largely in place through the weekend.
As the storm system which brought widespread rain and snow to the region exists to the east tonight, high pressure will build in from the west and northwest. Closed upper low exiting off the east this afternoon.
with high pressure aloft in control over the region through the bulk of the forecast period. The strong upper level ridge remains over Idaho this afternoon. with positively tilted ridge axis over central Montana Wednesday.
702 PM CST Tue Feb 14 2017 Water vapor loop indicated a short wave trough from WI to southeast Ontario. North-south upper jet was diving south on the west side of the trough. Warm up begins tomorrow as ridge axis shifts east allowing for return flow and respectable warm advection.
658 PM EST Tue Feb 14 2017 Colder, more seasonable temperatures will arrive behind a cold front overnight along with a few flurries or light snow showers, especially closer to Lake Michigan. Highs on Wednesday will only reach the lower to middle 30s. However, the cooler air will be short- lived as warmer air surges back this weekend. Cold front will sweep through the area late this afternoon into this evening, bringing temperatures back closer to reality for mid February. Very small potential that ice growth may not occur and a brief period of freezing drizzle could ensue. Lows will bottom out in the middle to upper 20s with only minimal recovery into the lower to maybe middle 30s Wednesday.
721 PM EST Tue Feb 14 2017 A cold front will move across the region tonight.
Will see an active night weatherwise as a low pressure system pushes across the Southern Appalachian Region. Higher elevations will see temperatures fall to near freezing and expect rain to transition to snow overnight. Chattanooga Airport, TN 43 50 31 56 / 100 40 0 0 Knoxville McGhee Tyson Airport, TN 40 47 29 51 / 90 60 0 0 Oak Ridge, TN 39 48 26 51 / 90 40 0 0 Tri Cities Airport, TN 35 43 27 48 / 100 70 0 0 TN.
404 PM CST Tue Feb 14 2017 Much quieter weather across SE TX this afternoon (when compared to this morning) with the passage of the storms/cold front. The cooler/drier airmass filtering into the area from the NW should hold the next couple of days, but changes will be coming by the end of the week. A more progressive weather pattern for the mid- dle to long-range portions of the forecast as a series of upper trofs/lows move across the state from the west. with another possibly next Tue (perhaps with an accompanying weak cold front). As high pressure builds into the region.
A cold front will pass through the region Wednesday.
Cold front just east of the Sabine river approaching KPOE/LCH within the hour, and should be through AEX by 00z. Will maintain a chance for showers and thunderstorms over the south and central Louisiana through the early evening until passage of the cold front.
645 PM EST Tue Feb 14 2017 Low pressure to the south tonight. Cold front late tonight into Wednesday.
For the overnight, low clouds and fog will be the primary weather concern as the lower-levels of the atmosphere will moisten quickly ahead of the front. As low-level moisture quickly increases tonight ahead of an approaching cold front, widespread IFR conditions forecast for the overnight and into the mid-morning hours. By mid- morning, the low clouds should give way some as the front will be nearing the area. A band of showers and a few strong/ severe thunderstorms possible Wednesday as the cold front pushes across the waters.
The low pressure system was located in LA with trailing cold front southwest into the western Gulf of Mexico. Have trimmed POPs a bit but keeping a slight chance over the Suwannee Valley and portions of SE GA after 06z tonight as some patches of rain may move out ahead of the main prefrontal trough approaching. Timing of showers/tstms for Wed placed in around the 15-20z time frame for now as a prefrontal trough or individual shower/tstms cells move through the region.
/issued 214 PM CST Tue Feb 14 2017/ An upper low is centered over northern TX with precipitation wrapping around the low across east TX and the TX panhandle. This upper low is an extension of an upper trough centered over the Great Lakes. A portion of the previously mentioned upper low moves eastward and becomes entrenched in the upper flow of the upper trough over the Northeast/Great Lakes region. Another portion of the upper low lags behind and stalls out over northern Mexico.
The main focus for the overnight period will be the potential for a few isolated severe storms through 7z as the cold front pushes through the area. This was associated with a cold front. An additional round of -SHRA is possible between 15/07Z-15/12Z as the cold front passes over the region. Gusty winds and a northerly direction change will follow this cold front as it passes.
Broken stratocumulus with a departing cold front. Northwest winds will become gusty along the cold front and persist through most of the day Wednesday, especially toward southeast Wisconsin. A Small Craft Advisory is in effect until 3 PM Wed, for brisk northwest winds in the wake of a cold front. A cold front will be exiting far southeast Wisconsin early this evening. Temps will drop into the lower 20s tonight, and only recover into the upper 20s/lower 30s Wed.
Otherwise, the rain is quickly ending as the upper low's negative tilt quickly pushes all the weather out with the dry slot now up into the Natural State. The lower level colder air is spreading back over Texas and the upper wrap around showers will slowly filter out by mid morning.
959 PM EST Tue Feb 14 2017 Low pressure to the south tonight. Cold front late tonight into Wednesday.
1045 PM EST Tue Feb 14 2017 A cold front will move across the region tonight.
Surface wise, a ridge axis lies on the Florida Straits while an area of low pressure (1006 mb) is located over Louisiana. With the ridge axis nearby retreating southeastward, light mostly east winds will become gentle to moderate and turn southeast to south by morning.
531 PM CST Tue Feb 14 2017 Satellite imagery and surface observations this evening reveal low pressure continues to move off to the east of the region. High pressure will slide just to the south of the region Wednesday night, resulting in winds backing around to the west.
Dry and seasonable conditions under high pressure will continue across Nevada through Wednesday.
827 PM MST Tue Feb 14 2017 Axis of positively tilted upper ridge was shifting over Montana this evening with surface analysis showing pressure falls over the area as lee-side troffing develops.
430 PM MST Tue Feb 14 2017 Upper level ridging is building eastward into the Northern and Central Rockies toward the plains, with a closed upper low over Texas/Oklahoma. Mixing heights are limiting potential gusts this afternoon, however we will still see 15-20kt winds prevail through the early evening before decoupling of the low levels takes place. Some warmer guidance is indicating potential for mid 60s.
Skies have largely cleared out today across the region under a ridge of high pressure. High pressure will begin to shift eastward this evening and tonight, alonging the cirrus shield associated with the next storm system to move overhead.
617 PM EST Tue Feb 14 2017 Low pressure tracking eastward through the Gulf Coast States today move through our area Wednesday morning bringing showers and possibly thunderstorms.