Aikyam-Lab/Synoptic-Bench huggingface dataset:
Low pressure system is developing with frontogenesis taking place in west Texas.
311 PM CDT Tue Apr 25 2017 A cold front currently poised to our west across northwest Oklahoma will provide the spark for strong to severe thunderstorms across northeast Oklahoma and northwest Arkansas Tonight. Temperatures will be much cooler on Wednesday in the wake of the cold front.
Expect a quiet TAF period with high pressure building into the Southern Appalachian Region.
High pressure briefly builds across the region tonight then gives way to a series of progressively colder systems through the remainder of the week.
the biggest impact will be from the westerly winds late Wednesday and Wednesday night with the passage of a cold front. It is possible that some wind highlights will be needed for late Wednesday and Wednesday night for portions of the lower elevations.
Broad high pressure over the eastern half of the Gulf this morning along with a low on the Mid-Atlantic coast will maintain a dry westerly flow across the area. Winds begin to back tonight as high pressure moves east of the waters.
435 PM EDT Tue Apr 25 2017 Low pressure will move further away from the area tonight, allowing for weak high pressure to return in its place. High pressure will prevail across the region Wednesday.
350 PM CDT Tue Apr 25 2017 Moderate onshore flow and above-normal temperatures will continue into tomorrow before the arrival of a cold front tomorrow afternoon/evening.
With high pressure positioned over the Southern Appalachian Region.
245 PM CDT Tue Apr 25 2017 Band of showers associated with a warm front lifting northward across the region this afternoon, and should slide north of the local area by 00z or so. Meanwhile, a cold front lies just to the west, and should make its way to the Mississippi river by 12-15z Wed. The cold front works into eastern wi/central ill by 00z thu, just in time for another 500 mb through (currently swinging across the desert southwest) to lift northeast toward the Great Lakes.
Anticipate low stratus to redevelop overnight, but winds will likely remain gusty for a good part of the night as the low level jet increases and mixes. Dryline & cold front move into the region Wednesday afternoon.
352 PM EDT Tue Apr 25 2017 Low pressure will approach from the south tonight and Wednesday.
After these systems pass by, a longwave trough will deepen over the Great Basin in an "inside slider" pattern.
417 PM EDT Tue Apr 25 2017 A low pressure system off the North Carolina coast will move slowly northeast through Wednesday.
326 PM CDT Tue Apr 25 2017 Upper ridge axis directly aligned across the mid state today. This feature will move east and allow a cold front to swing across the mid state Wed nt.
Low pressure is currently over Wyoming, with rain spreading northeastward out ahead of the system, mainly over southwest SD. Have also recently been seeing some light fog developing over the eastern CWA where CIGs are the lowest, especially in the Coteau region. Main challenge for today is determining just how far north and east precipitation will penetrate the CWA in regards to the low over Wyoming. Although, with rather cold temps aloft on Wednesday over eastern areas, would not be surprised if the higher terrain of the Coteau saw wet snow accums much of the day within wrap around precip. Now, there is some question still just how far back to the west precip will occur over the eastern CWA on Wednesday as it all depends on the track of the low pressure from IA into MN.
Surface cold front has plowed into the Texas Panhandle and temperatures have dropped into the 50s behind it. Much cooler conditions expected for Wednesday with afternoon highs ranging from the upper 60s across the Big Country north of I-20 to the lower 80s along the I-10 areas.
Better forcing moves in from the W tonight as the upper trof approaches. This will cause low pressure to move from the strhn Plains to the Midwest with precip overspreading cntrl/NE MO prior to daybreak. This will be in response to the strong low level moisture convergence underneath the strong mid- upper level ascent ahead of the mid level trough that will become negatively tilted during the afternoon and evening.
610 PM EDT Tue Apr 25 2017 Low pressure centered over Delmarva tonight will continue moving northeastward. High pressure will ridge into the forecast area from the Atlantic in the wake of this system Wednesday.
The first short wave trough over the Texas Panhandle will move into the central plains tonight. The next short wave trough, northwest of the Four Corners region this afternoon, will move southeast into northwest Texas to the Permian Basin Wednesday morning and then eastward along the Red River Wednesday afternoon. Even though there will be weak cold air advection in the low levels, downslope warming will compensate to push temperatures in the 90s close to the coast on Wednesday. A front with cooler air behind it will move into the area Wednesday evening.
Expect MVFR conditions to develop into the evening hours with IFR conditions likely later tonight as the cold front moves through. with breezy south winds and highs generally in the lower 80s. Developing cyclone/cold front/dryline system to our west will shift east through the day.
244 PM CDT Tue Apr 25 2017 AS OF TUESDAY AFTERNOON, A COLD FRONT WAS BISECTING THE CWA FROM NORTHEAST TO SOUTHWEST. EXPECT WIDESPREAD LINEAR CONVECTION TO INITIATE ALONG THE COLD FRONT, MAINLY SOUTHEAST OF THE KS TURNPIKE. THE PRIMARY CONVECTIVE MODE EXPECTED IS A CLUSTER OF MULTICELLS ALONG THE COLD FRONT ALTHOUGH A BOWING SEGMENT CAN'T BE RULED OUT. HIGH TEMPERATURES WILL BE MUCH COOLER WITH HIGHS ONLY REACHING THE UPPER 40S TO LOWER 50S DURING THE AFTERNOON.
249 PM EDT Tue Apr 25 2017 South Florida and the Keys are under the influence of high pressure spreading northward from the Caribbean. A vigorous low pressure system is moving northward along the Outer Banks with a frontal zone extending southward across the central Bahamas. Winds along the Keys Island Chain are out of the west at 5 to 10 knots at the island terminals and the marine stations west of the Seven Mile Bridge, and near 10 knots at the C-MAN Stations to the east. Winds will turn east to southeast allowing warmer air to advect over the area returning daily maximums to the mid 80's by Wednesday and through the weekend.
A weak short wave ahead of the low is helping to support the narrow band of showers/virga lifting north through southern Wisconsin this afternoon. Thereafter, we start to see showers associated with the low and its cold front enter areas west of Madison, then move slowly east overnight. The cold front will reach Madison by early afternoon on Wednesday and Milwaukee toward early evening.
143 PM PDT Tue Apr 25 2017 Cool and windy conditions with light showers for Wednesday as low pressure moves through northern Nevada. High pressure should return for a warm and dry weekend. Large scale pattern of high pressure over the eastern Pacific and a deep trough over the Rockies/Central Plains will maintain a strong northwest flow aloft.
237 PM EDT Tue Apr 25 2017 Low pressure system moves off the Carolinas coast loosing its grip on our weather. Brief high pressure builds tonight and Wednesday.
311 PM EDT Tue Apr 25 2017 Low pressure system moves off the Carolinas coast loosing its grip on our weather. Brief high pressure builds tonight and Wednesday.
1241 PM CDT Tue Apr 25 2017 Latest suite of satellite imagery shows a mid/upper level low circulating in eastern Wyoming. Upper low slowly transitions east today/tonight. Initial conversations with WPC this morning concerning the NAM initialization of the dynamics today, that area associated with the higher qpf/snow totals Wednesday is that it has support from the larger scale perspective. Tonight will be cold with temperatures falling into the low 20s across western North Dakota.
110 PM EDT Tue Apr 25 2017 Low pressure will move away from the area today while high pressure builds in.
653 PM EDT Tue Apr 25 2017 Low pressure will move further away from the area tonight, allowing for weak high pressure to return in its place. High pressure will prevail across the region Wednesday.
Dry weather and gradually decreasing cloud cover will prevail today, with high temperatures generally in the lower 80s. The parent low pressure system remains over the southeast United States and will north along the eastern seaboard of the United States over the coming days. Today will be a dry and somewhat cooler day across South Florida. Deep layered Atlantic high pressure will hang over the region into the weekend as the next frontal system emerges over the central United States. High pressure will build across the region for the coming days, allowing a lighter flow over the waters.
Ridging will dominate this TAF period. The local area will be dominated by weak ridging today as an upper level low continues to move east of the area and a new trough digs into the southern plains. Mostly sunny skies are expected today with highs ranging from the upper 70s along the coast to the low to mid 80s inland.
157 PM EDT Tue Apr 25 2017 The region will continue to be sandwiched between two areas of low pressure, one to the west and one to the east, today through Wednesday.
338 PM EDT Tue Apr 25 2017 Low pressure in the central plains will move northeast to the western Great Lakes by Wednesday evening. A cold front will extend south to the texas coast.
Will be a tough temperature forecast as it is almost entirely predicated on the low clouds actually dissipating. Surface and upper low lift out for Tue night and Wed and will actually see some upper level riding across the area.
257 PM EDT Tue Apr 25 2017 Upper low off the North Carolina coast will continue to pull away taking what moisture is left with it. Skies will become clear tonight as a weak upper ridge builds over the CWA. All models agree with a short wave being kicked out of the main trough and moving into the Tennessee Valley late Wednesday night.
331 PM EDT Tue Apr 25 2017 Low pressure will move further away from the area tonight, allowing for weak high pressure to return in its place. High pressure will prevail across the region Wednesday.
Surface analysis reveals region being influenced by two separate areas of low pressure, with one over the Carolinas and another over parts of the southern Plains. A line of strong to severe thunderstorms will fire off ahead of a cold front in MO/IL/AR Wednesday afternoon and evening and make its way toward our region.
321 PM CDT Tue Apr 25 2017 Latest water vapor imagery showed cyclonic flow prevailing over the western and central CONUS with a mid-level closed low evident over eastern WY. Upper level trough over WY to the Four corners will move east to the Upper Midwest-Southern Plains tomorrow.
303 PM CDT Tue Apr 25 2017 Gusty south winds will continue into this evening, as a cold front approaches from the west. Low level moisture will be on a steady increase tonight, with the cold front expected to reach near the Mississippi River by 12z/7am Wednesday. Better chances of rain will begin Wednesday afternoon as the cold front pushes to near I-55.
112 PM EDT Tue Apr 25 2017 Building high pressure will return dry, and very warm weather to the Upper Ohio Region for Wednesday. Upper level low pressure will continue to slowly trundle up the East Coast tonight with increasing subsidence on the western flank suppressing residual rainfall. Insolation with rising heights/warm advection in response to a deepening plains trough will maintain dry weather for Wednesday, and drive temperature well above the averages.
Inversion conditions will develop later this week as higher elevations warm significantly due to strong high pressure aloft along the coast, while the valleys stay cold.
Above normal low temperatures tonight in the low 60s inland and mid to upper 60s along the coast. There will be less cloudiness than today which will allow high temperatures to reach the lower 80s, even mid 80s possible interior. (prev discussion) High pressure ridge along the eastern seaboard will retreat eastward over the western Atlantic. As a result, the low level flow will veer out of the southeast overnight and continue Tue with speeds around 10 knots across the north and 15 knots south.
The changes start tonight, as a strong cold front approaches and spreads showers, and maybe a few thunderstorms, over most of our area by sunrise on Tuesday. The coolest temperatures on Tuesday will be in a narrow post- frontal band of clouds, but those temperatures could make at least a small re-bound Tuesday afternoon, as clouds start to thin over at least the western two-thirds of the Mid-State Still looks like cold weather for the remainder of the forecast period, as an upper trough develops over the eastern United States.
851 PM EST Mon Dec 4 2017 High pressure will remain offshore through tonight Tuesday. A strong cold front will move through the area Tuesday night.
908 PM CST Mon Dec 4 2017 Cold front has finally caught ongoing convection and has allowed for increasing convergence along the front, thus the increasing coverage along the boundary itself compared to 4 hours ago. /issued 644 PM CST Mon Dec 4 2017/ For the 05/00Z TAF period, VFR conditions starting out this period but expect this to be brief as clouds increase and lower to MVFR status ahead of a cold front shifting south into the region later tonight.
905 PM EST Mon Dec 4 2017 A cold front will bring rain late tonight and Tuesday. Fries The cold front associated with this wave will cross the region on Tuesday. Although PWAT will be unseasonably-high and approaching the daily record maximum owing to a strong sly low- level jet, the high moisture content will last only a short time and the strongest forcing with the wave will pass by to the nw, which may reduce the precipitation efficiency. The greatest chance of lingering wintry precipitation will be in the ern zones near the ridges, where the shield of precipitation will reside late in the day. A major shift in the atmospheric flow pattern will be ushered in with the passage of the cold front, with a broad longwave trough in the ern CONUS and a sharpening ridge in the wrn CONUS.
Expect these strong winds to continue the remainder of the afternoon ahead of the cold front over Kansas. Convection beginning to develop near Kansas City and further development to the south is expected over the next few hours and then blossom as it heads eastward ahead of the cold front. This will drop temperatures down into the lower 30s by morning and combined with the winds will see wind chills in the 20s for the morning commute.
837 PM CST Mon Dec 4 2017 The cold front is exiting southeast Oklahoma now, but gusty north winds will persist for a while.
A cold front will slide southward across west Texas and southeastern New Mexico overnight, with initial FROPA expected at KHOB around 05/06Z with the remainder of the terminals in the next 2-3 hours. Unfortunately, this will come to an end overnight as a strong cold front backdoors into the region, courtesy of an upper trough currently moving thru the upper midwest as per WV imagery.
Dew points in the upper 60s will keep overnight low temperatures in the low 70s for most of the RGV and upper 60s in the Ranchlands. Tuesday, a deep trough will move into the eastern U. and bring a strong cold front through South Texas and into our area Tuesday afternoon. Timing of the front will be very important as high temperatures could rise into the mid 80s in the lower to mid RGV prior to the passage.
Showers and thunderstorms will remain possible at the Arkansas sites for the first hour or so of the forecast period just ahead of a cold front. /Issued 337 PM CST Mon Dec 4 2017/ Strong cold front was located across western Osage county and extended southwest to near OKC at 3 pm. Front will eventually overtake dry line and sweep through southeast OK and west central AR before 06z, with gusty north winds ushering in much cooler air after record highs in some places this afternoon. This will bring a few more dry cold fronts south during the upcoming week, though the brunt of the coldest air does figure to remain to our northeast, with only a couple of glancing blows of Arctic air.
644 PM CST Mon Dec 4 2017 For the 05/00Z TAF period, VFR conditions starting out this period but expect this to be brief as clouds increase and lower to MVFR status ahead of a cold front shifting south into the region later tonight. Strong cold front to enter se OK by late this evening with more active tstms possible embedded in larger scale rainfall with front. This front will lose some forward momentum as it reaches the base of the upper trough, somewhere near the southern edge of the cwa.
505 PM CST Mon Dec 4 2017 Main concern this afternoon involves the well advertised cold front that continues moving through the area, and the associated severe threat from thunderstorms now forming along the boundary. The one caveat seen right now is evident on the special SGF sounding which shows a decent cap remaining in place, however deep layer lifting should increase as the afternoon hours continue on as the upper trough approaches from the west. The aforementioned front however will mark the end of above normal temps for the foreseeable future, as Tuesday's high temps will only warm into the lower to middle 40s.
527 PM CST Mon Dec 4 2017 /00Z TAFS/ A strong cold front will push across the area this evening. The cold front will move through KABI and KSJT between 05-06z and through the southern terminals between 08-09z. A strong cold front can be seen moving south through Texas Panhandle region as of 230pm this afternoon. 20 (Tuesday night through Monday) Mid levels of the atmosphere will begin to saturate from north to south Tuesday night as an upper trough develops over Southwest United States.
536 PM CST Mon Dec 4 2017 Early this afternoon, a deep surface cyclone was over southern MN with a trailing cold front extending south into the southern Plains, still well to our west. Focus for convection tonight will be along the aforementioned cold front, that will move across the area. Even with a decent low level jet, the low level lapse rates are not conducive to downward momentum.
612 PM EST Mon Dec 4 2017 Strong cold front Tuesday.
Not much has changed from the previous update, the time of the cold front and the rain moving through is still set to come into the Northern Delta between 09-11Z. /SKH/ Prior discussion below: Tonight through Tuesday: A cold front begins to approach the area this evening and move into the delta very early on Tuesday.
Strong high pressure will build into the area and remain in place through the next seven days.
534 PM CST Mon Dec 4 2017 A cold front and band of showers/isolated storms will track across the forecast area this evening. Once the band of precip shifts east of our area, along with the cold front, late this evening, winds will shift into the west which should start the downward trend in temperatures for the rest of this week. A rather large temperature gradient across the region tonight with lows forecast to dip to the upper 20s north to the lower 40s far southeast counties. Highs on Tuesday will rise into the upper 30s far north to the low to mid 40s far south, but the gusty winds will make it feel much colder than that.
A Broken line of showers and sct tstorms will move newd around 43 kts with the passage of the cold front this evening. A brief period of showers and tstorms will occur with the cold frontal passage this evening. Southerly winds will remain gusty this evening ahead of low pressure and an associated cold front. The 0-6km shear and mid level lapse rates are favorable and the surface dew points are likely to sneak into the low/mid 50s. The cold front will then swing through later this evening and bring an end to the shra/tsra.
1035 PM EST Mon Dec 4 2017 Clouds are increasing and lowering tonight ahead of an upper trough and cold front still moving into the mid Mississippi Valley this evening. May have to issue wind advisory later tonight as could increase more ahead of southwest low level jet that could reach 50 knots across northern areas Tuesday ahead of the strong cold front.
Heavier rain and lower mvfr ceilings will then occur at KTYS and KTRI later Tuesday morning or afternoon due to warming and drying southeasterly flow across the higher terrain east of the Tennessee Valley.
/EC/ Tonight through Tuesday: A cold front begins to approach the area this evening and move into the delta very early on Tuesday.
440 PM MST Mon Dec 4 2017 Cold front has pushed well south and east of the Cheyenne CWFA this afternoon with winds and snow easing. All wind and winter headlines have been dropped this afternoon as high pressure builds into the area. Warmer temperatures Tuesday as we transition back to a more westerly downsloping weather pattern.
The overall weather pattern across the area won't change much at all over the next 1-2 weeks with an upper level ridge expected to set up along the West Coast and remain there.
Strong high pressure aloft will promote dry conditions throughout the week and will be accompanied by mild afternoons and chilly mornings. In addition, breezy east winds are expected along ridges later this evening into very early Tuesday across southeast Mendocino County.
Large shield of CI spreading over the area tonight from the west and this will overtop the developing ST deck tonight ahead of the cold front. Rain chances looking fairly low through 09z then increasing with the approaching cold front.
530 PM EST Mon Dec 4 2017 It will remain relatively warm ahead of an approaching strong cold front through Tuesday.
646 PM EST Mon Dec 4 2017 It will remain relatively warm ahead of an approaching strong cold front through Tuesday.
Through at least the middle of the month, a deep longwave trof will remain anchored over eastern Canada, extending south through the eastern half of the lower 48. Concurrently, an unseasonably strong upper level height ridge will extend up the west coast into the Gulf of Alaska. In the short term, a cold front will enter northeast AR toward midnight tonight, and drop through the remainder of the Midsouth by sunrise Tuesday.
633 PM MST Mon Dec 4 2017 Main low pressure system continues to exit the region with winds slowly diminishing over the area. At the surface, low pressure over Minnesota and high pressure across the Rockies is creating a tight pressure gradient across the CWA resulting in northwest winds at speeds of 25 to 35 mph and gusts of 55 to 60 mph. Additional snowfall for the week at this time looks to be 4 to 8 inches for the higher hills.
856 PM CST Mon Dec 4 2017 A strong cold front has started to push into west-central and northwest Illinois this evening. A cold front and band of showers/isolated storms will track across the forecast area this evening. Once the band of precip shifts east of our area, along with the cold front, late this evening, winds will shift into the west which should start the downward trend in temperatures for the rest of this week. A rather large temperature gradient across the region tonight with lows forecast to dip to the upper 20s north to the lower 40s far southeast counties. Highs on Tuesday will rise into the upper 30s far north to the low to mid 40s far south, but the gusty winds will make it feel much colder than that.
A cold front and upper system will move through AR and develop scattered showers and isolated thunderstorms that will affect all Taf sites. Winds ahead of the cold front will be south at 10 to 20 mph, then switch to the west to northwest at 10 to 20 mph. Ceilings will also thin and lift gradually from the northwest behind the cold front.
1031 PM EST Mon Dec 4 2017 Currently - A large high pressure system over the eastern United States is producing moderate northeast to east breezes across the Keys. Meanwhile, deep layered ridging is maintaining substantial dry air aloft and a strong inversion based at 850 mb. Short Term Update - Deep layered ridging overhead will keep rain chances out of the forecast through the overnight period. Temperatures will bottom out in the lower to mid 70s, depending on proximity to the coast.