Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper level ridge over SASK will shift east and build over central Canada while an upper low over NM will move northeast and undercut the ridge and eventually rotate up the west side of the ridge and over the forecast area by the end of the period.
510 AM CST Wed Jan 18 2017 Surface map early this morning has a ridge of high pressure extending from KS/MO northward through eastern MN/western WI. plan on overnight lows in the middle 20s to the lower 30s. Looks like mainly rain, but may see some patches of freezing rain as well as temperatures bottom out in the lower/middle 30s.
414 AM CST Wed Jan 18 2017 (Today and Tonight) An upper low currently over northeast New Mexico will lift northeast into Kansas by this evening, with associated trough axis translating east across the area overnight. Temperatures will be warmer today, with near seasonal afternoon highs in the mid and upper 50s. Clear to partly cloudy skies will prevail across the area tonight, with lows in the lower 40s.
1025 AM EST Wed Jan 18 2017 High pressure will build toward the region today before settling overhead Thursday.
A low pressure center has developed over South Texas overnight. This will allow the front to begin lifting northward as a warm front. Showers and thunderstorms will continue over the Mid-South on Thursday as the upper trof swings into the area. The trof will move the shower and thunderstorm activity east of the CWA by midnight Thursday evening.
1005 AM EST Wed Jan 18 2017 A weak cold front in the forecast area today will be south of the area tonight. Ridging will extend through the region in the wake of the front tonight and Thursday.
635 AM EST Wed Jan 18 2017 A weak cold front in the forecast area today will be south of the area tonight. Ridging will extend through the region in the wake of the front tonight and Thursday.
648 AM EST Wed Jan 18 2017 A cold front has pushed through east Tennessee overnight.
TFJ Upper ridge currently over Montana will move to the east today. Although shallow inversion remains, warm air advection has allow temperatures to stay warmer overnight than previous nights which will allow for warmer temperatures today. Upper flow begins to turn southwest this afternoon as upper trough begins to dig in towards the California coast. The trough moves inland Thursday and Thursday Night turn the flow aloft more southerly. A cold front moves through the area Thursday Night with limited moisture.
Snow, sleet and freezing rain expected today. Whitebird Grade is expected to experience snow and eventually a mixture with sleet or freezing rain by mid morning. Although the heaviest precipitation is expected to occur over north-central Idaho today, lingering rain, freezing rain or snow is expected through Thursday morning. By daybreak or after daybreak, there may be enough milder air pushing into the region that some locations will see freezing rain mixing in. Hamilton may be the first location in the Bitterroot Valley to jump up towards or eclipse the freezing mark by this afternoon while Missoula may stay in the 20s. Once this plume of moisture transitions southward by this afternoon, precipitation intensity will decrease somewhat, but the threat for a mixture of freezing rain and sleet will continue through Thursday morning.
High pressure over Missouri will push east across the Ohio Valley today and tonight. the High pressure systems will have exited to the east while a Low pressure system and warm front approach the Wabash Valley from the southwest.
1012 AM EST Wed Jan 18 2017 Cold front now through the area with latest hires models indicate no more pcpn for remainder of day. Made minor tweaks to temperature to reflect slightly cooler temps and starting out this morning in the Southern Valley. Chattanooga Airport, TN 62 47 63 55 / 20 30 70 100 Knoxville McGhee Tyson Airport, TN 58 39 62 51 / 10 10 40 90 Oak Ridge, TN 57 40 59 51 / 10 10 60 90 Tri Cities Airport, TN 55 33 61 47 / 10 10 20 100.
High pressure ridging will hold in place today. However, some mid and high level clouds will move across the area ahead of an upper low and trough approaching the Pacific Northwest coast. In addition, lee-side troughing will remain in place allowing for fairly tight pressure gradients across the Upper Yellowstone and Upper Stillwater valleys.
The leeside trough convergence zone near the Colorado border will become the focus for late afternoon surface-based (SB) convection. This synoptic scale patter will keep a surface leeside trough in place, resulting in persistent south to southwest winds in the breezy (and sometimes windy) category during the daytime hours. Boundary layer convergence along the lee trough will also be fairly persistent, leading to daily late afternoon/evening isolated to widely scattered thunderstorms chances across far southwest and west central KS.
430 AM EDT SUN SEP 4 2016 Surface analysis shows a high pressure ridge stretching from the Mid Atlantic states back through north Georgia. A weak trough is situated across the panhandle of Florida. The low pressure trough will be the main weather player for today. The ridge will push southward tomorrow, and the trough will be less of a player for precip for Monday. Models are progging a little less cloud cover for Monday, with slightly warmer MaxT's. Pattern dominated by large scale ridging and well above normal temps.
119 AM EDT Sun Sep 4 2016 High pressure will maintain dry weather and warm temperatures through midweek. Dry conditions will prevail through midweek, with much warmer temperatures, as a high amplitude ridge builds in the wake of the tropical activity, and in advance of a Western CONUS trough. High pressure should maintain VFR conditions and NE wind at 10kt or less through the TAF period.
359 AM CDT SUN SEP 4 2016 Long wave trough forecast to remain over the western US with many short waves moving through the flow through 84 hours. Water vapor loop indicated an upper level trough located over the west coast with short waves embedded.
The 8 pm EDT regional surface analysis showed a weak trough roughly along I-10, which, when combined with ample deep layer moisture, produced scattered showers and thunderstorms late this afternoon and evening. The moisture will begin to get scoured out to our south and west on Monday as deep layer ridging and a much drier airmass builds in. PoPs will be tapered north to south on Sunday with the highest(60-70%)over our Florida zones. Highs will be in the upper 80s to around 90 and lows will be in the lower 70s.
427 AM EDT SUN SEP 4 2016 Canadian high pressure will keep pleasant weather over NY and PA through Monday, with the possible exception of the Catskills and Poconos, where light showers associated with Hermine are possible. High pressure extending out of Ontario will keep dew points lower than in previous weeks, while Hermine's precipitation remains east of our forecast area.
This ridge is being blocked from moving east in large part due to the post-tropical cyclone Hermine moving slowly up the east coast. The ridge has slid far enough east that we now get into a better southerly flow and this will allow temps to warm slightly today and over the next few days. Breezy southwest winds will usher warm and more humid air into southern WI on Monday as the ridge over the mid Mississippi River Valley starts to shift east. Monday night will probably stay dry, but there is a chance that convection could develop over MN and spread east overnight as the low level jet veers.
This is due to a trough that is moving east out of the region.
317 AM EDT SUN SEP 4 2016 Post Tropical Cyclone Hermine will continue to lift slowly northeast along the East Coast through late week. High pressure will persist over the Southeastern States through late week. Lows in the lower 60s along the coastal plain to around 70 along the Outer Banks. The remainder of Eastern NC will experience dry weather with increasing warmth and humidity, especially late week as high pressure surface and aloft prevails over the area.
A low pressure trough will remain over California through Sunday and result in continued cooler than normal temperatures.
Much cooler and wetter weather along with mountain snow is the primary forecast message today into Monday as a significant low pressure system passes through. Snow levels will drop to around 6000-6500 feet by this evening with several inches of snow for the higher elevations.
Temperatures will trend much cooler this weekend, then warm to seasonable levels by the middle of the week. Upper level trof still sitting over the west coast and providing for a cool-down in temperatures. The associated cold front has already pushed through the region with the district now under the cold sector. This cold front is rather dry with limited amounts of moisture pushing through the west coast. Trof axis will exist over the west coast today as another piece of vort max energy moves into the district.
The next round is already initiating across the higher terrain of east-central Colorado. The next couple of nights will bring warmer temperatures in the upper 60s to around the 70 degree mark.
554 AM CDT SUN SEP 4 2016 We will be between two disturbances within southwest flow due to the synoptic trough to the west over the Great Basin. The low-level jet is helping to perpetuate the current convection, but it should continue on its way out this morning, and by afternoon, most locations should be dry in between perturbations. The next wave comes tonight as a cold front approaches from the northwest. Strengthening of the low- level jet tonight will aid in the production of storms and could lead to an MCS containing severe weather, especially in our northwest by late evening into the overnight.
637 AM EDT SUN SEP 4 2016 An expansive area of high pressure stretching from the Great Lakes to northern New England will remain in place through early this week.
NAM guidance a little slower with the dry surge which would support the higher risk for the Panhandle this afternoon.
A 40-50 kt low level jet will work into Minnesota tonight before this low lifts north of the area Monday. Even though a bit more clouds may around today and Sunday compared to the last few days, increasing south winds will lift a warmer and more humid air mass into the region for the start of the work week.
1130 PM MDT SAT SEP 3 2016 UPDATED AVIATION SECTION A low pressure trof is over the Pacific Northwest and moist, southwest flow will continue over the region. The steadier rain is expected to move into the Highway 2 corridor. Total snow accumulations of 1 to 3 inches look possible on the higher passes. with up to 7 inches at ridge tops. Temperatures will be quite a bit cooler in most areas on Sunday/Monday because of cloud cover/precip.
Potential for scattered convection looks reasonable today, given the weak upper low/TUTT and the moisture advection accompanied by daytime heating. For Monday/Labor Day drier air comes in during the day, as the upper ridge gets a bit stronger and tries to build back a bit (but not totally) into the region. Maybe a degree or two cooler on temperatures today, but warm and muggy tonight. Warmer and drier air on Monday could bring temperatures back in the mid 90s east and upper 90s west.
Closer to home upper ridge will build up over the area from the south today and Monday with moisture trying to return in weak southerly flow on Monday.
202 AM CDT SUN SEP 4 2016 Surface and upper-level ridge to maintain mostly clear skies today with light winds and high temperatures in the lower 90s across the region. Clouds to increase in coverage overnight into Monday as upper- ridge shifts east and southerly flow of moisture returns across the region. Low temperatures in the low 70s expected tonight. An enhanced sea-breeze to allow for a chance of afternoon showers and thunderstorms across the region on Monday afternoon with high temperatures forecast to climb into the lower 90s.
With an upper level trof being ovr the western U. High temps on Sun are expected to be a little above average acrs the southeast plains, and around average in the high valleys. A trough will slowly progress eastward this coming week, moving from the great basin early on Monday to the Rockies by mid-week, then on to the Mississippi Valley late in the week. Will see highs in the lower 90s for the first half of the week as southwesterly flow persists over our area.
High pressure to the north will start to build in bringing drier air to se Ga by this evening with drier air spreading into ne Fl late tonight. Lows tonight will range from the upper 60s over inland se Ga to the low/mid 70s near the Ga coast and over ne Fl. Amplifying trof aloft over the SE U. coastline and high pressure ridge aloft over the lower MS valley will push a much drier airmass into the region from the North. High pressure ridge settles juts north of the region with mostly clear to clear skies developing overnight. Some Min Temp guidance has some readings into the lower 60s inland SE GA by sunrise Tue Morning.
411 AM EDT Sun Sep 4 2016 High pressure will maintain dry weather and warm temperatures through midweek. Dry conditions will prevail through midweek, with much warmer temperatures, as a high amplitude ridge builds in the wake of the tropical activity, and in advance of a Western CONUS trough. VFR conditions will continue under high pressure.
(Issued 938 PM CDT SAT SEP 3 2016) Generally quiet and mild wx conditions prevail across the cntrl TN Valley this late Sat evening, with high pressure layered over the cntrl Gulf states in control over the overall wx pattern.
With moisture advection, weak upper low and daytime heating, looks like a pretty good shot of getting some convection along the sea- breeze today over the terminals.
314 AM CDT SUN SEP 4 2016 High pressure anchored over the Great Lakes will bring pleasant weather to central Illinois today. Light E/SE winds around the high will keep humidity values low, as afternoon high temperatures top out in the lower 80s. Another clear and cool night will be on tap for tonight, although with winds taking on more of a southerly component, low temperatures will be slightly warmer than in recent nights. with readings dropping into the lower 60s. Blocking pattern will remain in place across the central/eastern CONUS through mid-week, as remains of Hurricane Hermine meander off the Mid-Atlantic coast.
Heights will continue to increase through tomorrow, along with temperatures, as the upper ridge to our east slowly meanders westward and expands. On the western fringe of this ridge, one or two perturbations will lift northward out of TX and near the Red River during the afternoon.
339 AM CDT SUN SEP 4 2016 High pressure system now over the eastern Great Lakes causing light SE sfc winds in E Iowa/NW Illinois.
Next upper trof across southern NV will be lifting rapidly across the forecast area during the afternoon. sfc trof axis will likely lie along a line from Eads to Kim. CAPE values rapidly increase towards the KS border and position of the drier air along/west of the trof axis will determine how much CAPE will be available in SE CO. Gusty southwest winds will spread over all of the area by this afternoon and this should help warm temperatures to values similar to a couple degrees warmer than yesterday. Lows tonight should stay on the mild side where downslope winds continue into the lee trof overnight. Southerly surface flow ahead of the trough will bring low level moisture northward. GFS has over 1000 J/kg of CAPE along the trough while NAM is closer to 2000 J/kg.
422 AM CDT SUN SEP 4 2016 We will be between two disturbances within southwest flow due to the synoptic trough to the west over the Great Basin. The low-level jet is helping to perpetuate the current convection, but it should continue on its way out this morning, and by afternoon, most locations should be dry in between perturbations. The next wave comes tonight as a cold front approaches from the northwest. Stengthing of the low-level jet tonight will aid in the production of storms and could lead to an MCS containing severe weather, especially in our northwest by late evening into the overnight.
130 AM CDT SUN SEP 4 2016 206 PM CDT Quiet weather continuing today and through the period as high pressure remains in place. Another cool night expected with lows once again falling to the 50s for most locations, with slightly warmer temps around 80 on Sunday.
627 AM EDT Sun Sep 4 2016 High pressure will maintain dry weather and warm temperatures through midweek. Dry conditions will prevail through midweek, with much warmer temperatures, as a high amplitude ridge builds in the wake of the tropical activity, and in advance of a Western CONUS trough. Otherwise, VFR conditions will continue under high pressure.
258 AM PDT SUN SEP 4 2016 A front will move through northeast California and western Nevada today, bringing cooler conditions along with afternoon breezes.
Next cold front approaches late in the week. Went a bit cooler than guidance tonight for low temperatures as this has been the trend the past few nights as well. temperatures at 925 and 850 are a couple of degrees warmer in the models tonight. Upper level ridging to our west will begin to overspread the area by late Sunday.
This activity was sustained by the 75-85 KT jet moving through the base of a deep trough to the west working on deep moisture (GJT's 00Z/Sunday sounding held 0. The trough axis to the west shifts eastward today resulting in a tightening of the height gradient across the north while advecting drier air into the southern portion of the forecast area.
306 AM EDT SUN SEP 4 2016 Canadian high pressure will keep pleasant weather over NY and PA through Monday, with the possible exception of the Catskills and Poconos, where light showers associated with Hermine are possible. High pressure extending out of Ontario will keep dew points lower than in previous weeks, while Hermine's precipitation remains east of our forecast area.
A large area of high pressure and deep dry air is settled over nrn Michigan.
An early morning surface analysis showed the center of high pressure over western New York with Post-Tropical Storm Hermine about 300 miles offshore the mid-Atlantic coast.
The tight pressure gradient overhead is keeping southerly winds gusting 20 to near 30kts this afternoon, as we remain stuck between exiting high pressure across the Great Lakes, and nearing low pressure over western-central SD. Precip associated with the low level jet is not a given over the eastern half of the, and have limited it to mainly southeast of ATY. The 20Z sfc analysis shows the low centered across Corson, Dewey, and Stanley Counties, extending northward across ND and on the other side through far southwestern SD. Highs Monday will be in the upper 60s far northwest, and still in the low 80s far southeast. Decent mid level trof over the western conus will gradually lift out across the plains during the period, as a frontal boundary remains splayed out across the Central Plains.
321 AM EDT SUN SEP 4 2016 High pressure will remain in place across the region through mid week. High pressure and a dry airmass will be in place across the region through this afternoon. This will lead to a continued moderation in temperatures with highs today mainly in the lower 80s.
329 AM CDT SUN SEP 4 2016 (Today and Tonight) A strengthening ridge of high pressure will bring drier weather, partly cloudy skies and slightly warmer temperatures to the forecast area through tonight. Afternoon highs today will around seasonal normals in the lower 90s. Overnight lows will be in the lower 70s, slightly warmer than seasonal normals.
125 AM EDT Sun Sep 4 2016 High pressure will maintain dry weather and warm temperatures through midweek. Dry conditions will prevail through midweek, with much warmer temperatures, as a high amplitude ridge builds in the wake of the tropical activity, and in advance of a Western CONUS trough. VFR conditions will continue under high pressure.
An upper level low system will bring widespread precipitation chances for all areas today.
651 AM EDT SUN SEP 4 2016 Upper level ridge to build in as Hermine departs. Next cold front approaches late in the week. Clear skies will continue as a high pressure remains in control of the weather conditions through tonight. with the upper trough over the western CONUS and the upper ridge parked over the deep south. but staying dry given the low RH in the mid and upper levels. Temperatures and humidity will be on the rise as high pressure anchors itself over the southern and eastern US.
529 AM EDT SUN SEP 4 2016 A blocking ridge aloft will keep TS Hermine offshore.
337 AM CDT SUN SEP 4 2016 Upper trough extending down the West Coast with an upper ridge over the SE stretching west to Mexico. For a couple days the upper pattern will be mostly static but by midweek the trough will swing east riding over the top of the ridge and allowing it to stretch across the southern US border.
635 AM EDT SUN SEP 4 2016 Canadian high pressure will keep pleasant weather over NY and PA through Monday, with the possible exception of the Catskills and Poconos, where light showers associated with Hermine are possible. High pressure extending out of Ontario will keep dew points lower than in previous weeks, while Hermine's precipitation remains east of our forecast area.
655 AM EDT SUN SEP 4 2016 High pressure over the Lower Great Lakes will continue to gradually shift eastward over the next couple of days.
533 AM EDT SUN SEP 4 2016 Post Tropical Cyclone Hermine will continue to lift slowly northeast along the East Coast through late week. High pressure will persist over the Southeastern States through late week. Lows in the lower 60s along the coastal plain to around 70 along the Outer Banks. The remainder of Eastern NC will experience dry weather with increasing warmth and humidity, especially late week as high pressure surface and aloft prevails over the area.
625 AM EDT SUN SEP 4 2016 High pressure will remain in place across the region through mid week. High pressure and a dry airmass will be in place across the region through this afternoon. This will lead to a continued moderation in temperatures with highs today mainly in the lower 80s.
Latest satellite analysis showed the region under an upper ridge with a 592dkm high center over the central CWA. Overnight conditions continued to be on the more comfortable side with dewpoints in the middle 60s to the lower 70s. The upper ridge center will continue around the CWA through the period. Daily highs will be in the lower 90s. With nightly lows in the lower to middle 70s.
High Pressure bringing pleasant early Fall weather to OH Valley. High Pressure over the Sleeping Bear Dunes National Lakeshore MI/Traverse City area continuing to usher in mid to upper 50 dew points. By Sunday, Hermine becomes post-tropical and stalls off the mid- Atlantic coast while high pressure holds to the north across the Great Lakes. While and upper ridge over MS/AL begins to start nudging north, it will take some time for humidity levels to increase significantly and lows will be 2-4 degrees warmer in the low to mid 60s.
These clouds will slowly dissipate by noon today as the upper low over the mid-atlantic moves slowly east. Ridging aloft builds into the region with clear sky and calm winds.
102 AM EDT SUN SEP 4 2016 High pressure will remain in place across the region through the Labor Day weekend. High pressure ridge will be over the region through this time as tropical system spins in place off of the Delmarva peninsula. Period begins with a H5 ridge extending from the Gulf Coast to the Ohio Valley.
As the upper level trough remains over the area cool and wet conditions will persist through the remainder of the Labor Day weekend.
253 AM MDT SUN SEP 4 2016 Water vapor shows deep upper trof over the pac nw/west coast with disturbed sw flow extending newd through the nrn plains. a robust wave (currently rounding the base of the trof) will eject through the cntrl rockies. Cooler air will continue to filter through the cwfa with sct shra/tsra expected.