Aikyam-Lab/Synoptic-Bench huggingface dataset:
Light winds with weak high pressure ridge over the area will allow a lake breeze to develop this afternoon. VFR conditions today and Sat with polar high pressure to settle over the region. Highs today will be slightly warmer than yesterday with lows tnt in the teens.
350 AM MST Fri Mar 9 2018 Flat upper ridge will shift east today as weak warm front lifts northeast across western South Dakota. Low level thermal ridge peaks this afternoon.
A cold front will move across the Northern Rockies this afternoon. Shower activity will begin to wane by 10/0200Z most areas but may continue at times in the the higher terrain of Glacier National Park through 10/0800Z. Winter Weather Advisory until 8 AM MST this morning for I-90 Lookout Pass to Haugan in the Lower Clark Fork Region.
Showers and thunderstorms should be ongoing Saturday morning and lift to the north of the area by afternoon, however a cold front will be approaching and scattered showers and thunderstorms will continue to be possible until the front passes Saturday night Some of the storms could be strong to severe especially across central Louisiana.
High pressure will bring warm days and dry weather through early Saturday afternoon.
A cold front will move across the Northern Rockies this afternoon.
404 AM CST Fri Mar 9 2018 West-northwest flow aloft will continue over the Midsouth today, as southerly surface flow develops around the western periphery of a departing continental pressure ridge. Main story for today is warmer afternoon temperatures, near or slightly above early March normals.
543 AM EST Fri Mar 9 2018 Low pressure will continue to support periodic snow showers today. Dry weather returns Saturday under high pressure. The mid level trough axis should cross the area early this morning, with a gradual decrease in coverage thereafter. Boundary layer convergence and some lake enhancement should continue early this morning N of I 80, with terrain enhancement in the ridges. Mainly dry weather is expected through the weekend under high pressure.
501 AM CST Fri Mar 9 2018 Pretty quiet across central and southeast Illinois early this morning, with an axis of high pressure drifting overhead. Main concern will be with the development of a warm front just south of the Ohio River toward late afternoon. As for type, the easterly flow at the lower levels does not bode for a significant warming at the surface, and the drier air will allow for some evaporative cooling. A blocking pattern, courtesy of the residual upper low and a second low dropping south from Hudson Bay, will keep dry weather over our area through mid week. By that point, the upper low will finally be moving out, and a building ridge to our west will spread eastward.
Breezy conditions will also prevail elsewhere with temperatures climbing into the lower to mid 70s over nearly all of the region.
737 AM EST Fri Mar 9 2018 Low pressure will continue to support periodic snow showers today. Dry weather returns Saturday under high pressure. The mid level trough axis should cross the area early this morning, with a gradual decrease in coverage thereafter. Boundary layer convergence and some lake enhancement should continue early this morning N of I 80, with terrain enhancement in the ridges. Mainly dry weather is expected through the weekend under high pressure.
/issued 338 AM CST Fri Mar 9 2018/ SHORT TERM (Now through Saturday): In the middle layers of the atmosphere, Deep South Texas and the Rio Grande Valley will be caught between ridging over the West Coast of the United States and troughing over the East Coast. Meanwhile, at the surface, a moderate onshore flow today and tonight will be briefly interrupted by a weak cold front that will push into the BRO CWFA on Saturday. Above normal temperatures today and tonight will become even more so on Saturday as the weak cold front produces a downsloping effect off the neighboring higher terrain of Mexico.
752 AM EST Fri Mar 9 2018 High pressure will build in from the west through Saturday.
Thicker cloud cover will likely keep southern portions of the forecast area slightly cooler while northwest of I-44 warm and dry conditions will agitate fire weather conditions. An additional focus for possible convection will be the associated cold front passing through the area Saturday night.
Cooler temperatures with rain and high elevation snow will be possible by Saturday as a low pressure system moves through the area.
High pressure will build over the region, and winds will be light. Seas will continue to diminish today as high pressure builds over the region, so cancelled the Small Craft Advisory. Seas will continue to fall to 2 to 4 feet tonight and Saturday as high pressure builds over the waters. Winds will then increase Saturday afternoon ahead of a cold front.
524 AM CST Fri Mar 9 2018 We will remain in between high pressure exiting Minnesota, and nearing low pressure stretching from southern Canada to eastern Wyoming. For tonight, the focus will be on the 500mb trough currently over southern British Columbia.
356 AM MST Fri Mar 9 2018 Warm front lifting across eastern Montana this morning pushing overnight snow to the north and east. A little frost/freezing fog producing slight reductions in visibility this morning but not expected to last long or have much impact. As system moves east tonight, it will drag a cold front into Montana. Some precipitation expected with the front, mostly snow but some potential for freezing rain to watch out for. Toward the end of the week the upper low off the Pacific Northwest will push the ridge eastward. Ebert Generally VFR conditions although some visibility restrictions are possible through 14z with frost/freezing fog. An Alberta clipper will pull a cold front across eastern Montana tonight. Some snow showers or possibly freezing rain will occur with the front.
1032 AM EST Fri Mar 9 2018 High pressure will build in from the west through Saturday.
407 AM CST Fri Mar 9 2018 This morning's below freezing temperatures will give way to a warmer day today.
Overnight composite analysis reveals deep troughing through the Great Lakes and New England with a closed mid level circulation swinging into New England.
The 00z NAM and ECMWF for the most part keep the upper level low further to the west over western SD and drop it south through central Neb.
529 AM CST Fri Mar 9 2018 Quiet conditions and warmer temperatures are expected today as temperatures increase aloft, even despite light easterly flow at the surface.
Through the period an upper level low will move over the northern Rockies into the Central Plains. Surface and low level flow will shift to a southwest to westerly flow on Saturday ahead of an approaching cold front to the north.
650 AM EST Fri Mar 9 2018 High pressure will build in from the west through Saturday.
526 AM EST Fri Mar 9 2018 Low pressure will remain across the region today. The remaining area of snow with the surface/upper level lows is currently lifting across northern portions of the forecast area while diminishing. Energy rotating around the upper low will also help support the development of another low east of the Gulf of Maine which will intensify while tracking toward Nova Scotia later today. This low will also be captured by the upper low and retrograde westward across New Brunswick tonight.
High pressure will remain in place across the West heading into the weekend.
Overall, should continue to be a nice/warmer day with gradually increasing cloudiness late. Chattanooga Airport, TN 58 43 56 48 / 0 40 70 90 Knoxville McGhee Tyson Airport, TN 50 41 54 44 / 0 40 70 80 Oak Ridge, TN 50 40 53 44 / 10 40 50 70 Tri Cities Airport, TN 47 34 51 41 / 10 70 40 60 VA.
531 AM CST Fri Mar 9 2018 A weak cold front will move through the region late this morning into the afternoon shifting light winds to the north with VFR conditions. Saturday we expect the surface lee-side low pressure trough to deepen in response to a vigorous upper level low pressure system swinging southeast out of the northern Rockies into the high plains and slinging a cold front southward into our area. Saturday should see deep mixing and at least a low-end windy and warm day for areas to the south of the cold front which looks like it will impact at least the southeast Panhandle and northern Rolling Plains Saturday afternoon.
In the low levels of the atmosphere, an area of high pressure will be centered over the northeastern Gulf of Mexico this afternoon. In the upper levels of the atmosphere, a trough of low pressure will be located over the Florida peninsula this afternoon.
925 AM EST Fri Mar 9 2018 Low pressure will remain across the region today. Have also included patchy freezing drizzle across the region early this morning. The remaining area of snow with the surface/upper level lows is currently lifting across northern portions of the forecast area while diminishing. Energy rotating around the upper low will also help support the development of another low east of the Gulf of Maine which will intensify while tracking toward Nova Scotia later today. This low will also be captured by the upper low and retrograde westward across New Brunswick tonight.
1015 AM EST Fri Mar 9 2018 Low pressure will continue to support periodic snow showers today. Dry weather returns Saturday under high pressure. 10:15am update: Changes to the forecast were generally cosmetic, although PoPs were bumped up slightly higher in the vicinity of where the high-resolution models are showing potential banding setting up this afternoon. The mid level trough axis should cross the area early this morning, with a gradual decrease in coverage thereafter. Boundary layer convergence and some lake enhancement should continue early this morning N of I 80, with terrain enhancement in the ridges. Mainly dry weather is expected through the weekend under high pressure.
1040 AM EST Fri Mar 9 2018 Low pressure will remain across the region today. Temperatures across the region have risen to at or above freezing across the region. Update to remove freezing drizzle, otherwise no significant changes to the previous forecast. The remaining area of snow with the surface/upper level lows is currently lifting across northern portions of the forecast area while diminishing. Energy rotating around the upper low will also help support the development of another low east of the Gulf of Maine which will intensify while tracking toward Nova Scotia later today. This low will also be captured by the upper low and retrograde westward across New Brunswick tonight.
541 AM CST Fri Mar 9 2018 A warm front will move north through the state today and stall in southern Missouri, bringing gusty winds to the area.
939 AM EST Fri Mar 9 2018 An upper low to the north of the area will move off to the east today.
310 AM MST Fri Mar 9 2018 Today, more high clouds to contend with as temperatures inch up a few more degrees with highs in many valleys reaching the low 60s. Outside of the mountains, Saturday will bring variable cloudiness and somewhat cooler temperatures for our northern zones. By Saturday evening, the trough dropping in from the north will have moved to the upper midwest and CO will be under dry NW flow aloft.
VFR conditions today and Sat with polar high pressure to settle over the region. Highs today will be slightly warmer than yesterday with lows tnt in the teens.
This morning's below freezing temperatures will give way to a warmer day today.
536 AM MST Fri Mar 9 2018 The High Wind Warning for the Cody Foothills has been cancelled.
NRN AR wl see SE winds return on Fri as the high begins to shift EWD.
High pressure slides across the area tonight, exiting to the east on Friday. If a little more in the way of high clouds and wind occur, temperatures will be a bit warmer.
/ISSUED 519 PM CST Thu Nov 30 2017/ No issues expected for the 00Z TAFS as high pressure remains large and in charge.
Slight drying has occurred in the lower levels, but low temps will be a few degrees cooler, so expect at least patchy fog.
A surface cold front extended from northern Louisiana into north- central Mississippi and was entering into the far northwest corner of Alabama at this hour.
being a little warmer tonight than last night due to increased cloudiness. This is also where the SREF guidance has the highest fog chances.
/issued 645 PM CST Thu Nov 30 2017/ For the 01/00Z TAF period, VFR conditions will prevail as passing cirrus continues to shift across the region behind a weak cold front.
645 PM CST Thu Nov 30 2017 For the 01/00Z TAF period, VFR conditions will prevail as passing cirrus continues to shift across the region behind a weak cold front. Clouds associated along the back side of 85H trough of low pressure continued to sink South and should thin as the system moves East. Aloft weak ridging in the middle and upper levels will be spreading higher clouds into the forecast area as a weak upper low over the Baja region provides moisture in the Westerly flow.
526 PM CST Thu Nov 30 2017 At 3 PM, a 1026 mb high pressure area was centered over Kansas. This high was producing sunny to partly sunny skies. Temperatures were in the lower to mid-40s north of Interstate 94 and around 50 elsewhere. High pressure will drift east through Missouri tonight and then quickly move northeast through the Ohio River Valley on Friday. This will allow temperatures to warm into the mid and upper 40s north of Interstate 94 and into the lower and mid-50s elsewhere. On Friday night, a short wave trough will move north and northeast of the area.
As the high slips east, expect light return flow to develop and will help keep lows in the mid 20s to near 30, a few degrees warmer than this morning. Could be a bit breezier east of the trough, but lighter wind possible, especially in our west if trough moves in far enough east. Also, the cold front may make it far enough southeast that wind will start to drop off as well.
633 PM EST Thu Nov 30 2017 A weak cold front will push east through the region tonight accompanied by some light rain and snow. High pressure and drier air follows Friday into the upcoming weekend.
Mid level ridging across the ern half of CWFA Sat PM ahead of shrtwv trough will mostly result in little change in wx on Sat. Said shrtwv trough will pass across early Sun AM with a noticeable increase in mid level cloud cover. Low level thermal ridging will develop in wake of shrtwv trough and Sun PM will be warm, around 15 degrees above normal. Increased sw mid level flow will amplify thermal ridge farther east Mon resulting in another unseasonably warm day. This will be just ahead of a cold front (probably the strongest of the season) that will pass thru the n CWFA either late Mon PM or Tue. Cooler air will settle in over the next 2 days or so following the front.
519 PM CST Thu Nov 30 2017 No issues expected for the 00Z TAFS as high pressure remains large and in charge. mornings dipping into the upper 40s to middle 50s and afternoons warming into the lower to middle 70s.
For 06z Aviation discussion below Another mild and sunny day! Temperatures have exceeded expectations again with readings ranging from the low 40s to low 50s. Dew points aren't dry enough to allow temps to plummet, but we should be cooler than last night given the good radiational cooling setup in place.
High pressure will maintain dry and mild weather through the end of the work week.
951 PM EST Thu Nov 30 2017 A weak cold front will push east through the region tonight accompanied by some light rain and snow. High pressure and drier air follows Friday into the upcoming weekend.
For 00z Aviation discussion below Another mild and sunny day! Temperatures have exceeded expectations again with readings ranging from the low 40s to low 50s. Dew points aren't dry enough to allow temps to plummet, but we should be cooler than last night given the good radiational cooling setup in place.
Occasional mountain obscurations will be possible over the higher terrain.
A ridge of high pressure will shift south of the area with low pressure in central Nebraska and central SD overnight into Friday. This mild westerly flow aloft will remain in place through the weekend, with just a touch of a warming trend expected as a trough of low pressure begins to develop over the Rockies and a strong ridge of high pressure builds over the west coast.
Winds will become light and variable tonight, and with clear skies temperatures will fall into the lower 30s. As high pressure shifts to the east on Friday, southerly winds will return and the upper pattern will become zonal with a transition to weak upper ridging by the weekend.
529 PM CST Thu Nov 30 2017 Weak ridging over the west with cutoff closed low off Baja. Closed low over the Gulf of Alaska. Am concerned about the return of southerly flow which may prove to warm temperatures warmer than what is suggested. GFS slower and deeper with the trough and ECMWF is more progressive. Friday night front continues to move south across Kansas with clearing skies winds becoming southerly after midnight and temperatures in the low 20s.
Still have some time this evening and early overnight for temperatures to drop before the clouds arrive, with overnight lows in the low to mid 40s. Highs will generally be in the low to mid 70s, with overnight lows in the low to mid 50s.
Occasionally gusty west-northwest winds behind this morning's cold front will ease late this afternoon and even more tonight as high pressure across the plains expands across the southern Great Lakes. The high will shift east of the area Friday afternoon, allowing generally light southwest winds to develop.
A cold front is passing through the Pittsburgh area just before 6 PM with shower coverage rapidly diminishing in the wake of the front. Fries Sunshine will return to the region on Friday, but with much cooler temperatures and highs only reaching the 40s. High pressure will settle into the region for the weekend, with near seasonal temperatures expected and dry conditions.
543 PM EST Thu Nov 30 2017 A weak cold front will move into the area tonight.
Can't rule out a few light snow showers obscuring the higher peaks for a few hours, but the chance for snow accumulation appears quite low. Overnight temperatures should be slightly warmer than last night, esply under the mtn wave clouds in the breezy areas of the Front Range foothills. Highs tomorrow, even with the northerly breezes are progged to be a few degs warmer than those today.
933 PM CST Thu Nov 30 2017 Across the far southwest and portions of south central North Dakota where thick mid level cloud cover has yet to arrive as of 03 UTC, decreased overnight lows into the lower 20s, with isolated pockets in the teens.
Low amplitude upper ridge extended from the Pacific Northwest into the Northern Plains. Ridge axis will move the area Fri morning. Low amplitude trough will move through the area Fri afternoon. Zonal flow over the northern tier will transition to SW flow by the end of the weekend as an omega ridge amplifies over the west coast of Canada.
908 PM CST Thu Nov 30 2017 A ridge of high pressure is building across the area at the surface this evening. High pressure is building into the center of the country this afternoon, with an upper trough moving through the Great Lakes and ridging along the northern Atlantic coast. A cold front associated with the upper level trough has moved through IL last night and this morning. In the wake of the boundary, cooler temperatures and northwesterly winds dominate. The clear skies behind the front will continue through the overnight hours as the high pressure ridge axis drifts eastward.
Across Southwest Montana, temperatures will be cooler, but still above climatological norms.
High-res models suggest CAG- CPR gradients at H7/H85 will increase slightly in the next few hrs due to lee troughing over southeast Wyoming, and H7 flow may climb near 50 knots overnight.
A weak cold front has crossed through southern IN today and will continue to move through central KY over the next few hours. Lows tonight and tomorrow night will drop into the 30s with highs tomorrow topping out in the lower to mid 50s. High pressure will remain in place across the region through the weekend. Ridging will build in aloft.
608 PM EST Thu Nov 30 2017 A weak cold front will move into the area tonight.
High pressure returns during the day Friday, leading to a rather quiet and mild weekend. Clouds will slowly dissipate through the day as high pressure builds into the region. Afternoon highs will be in the lower 40s in the wider valleys, while the mountains will be in the mid and upper 30s.
407 PM MST Thu Nov 30 2017 20z surface analysis had high pressure over the southern plains with a lee trough from central MT into southeast WY, which is in response to return flow on back side of high and weak warm air advection.
High pressure lumbered slowly east this afternoon across the central CONUS. Dry air associated with this high pressure made the temperatures feel slightly cooler. This high pressure and minima of moisture serve as the forecast focus for the short term. GFS has much warmer temps than any of the other guidance. As a result have lowered the lows tonight to try and eliminate the bias of the GFS.
Clear skies will be accompanied by westerly flow through the early evening with high pressure initially positioned to the southwest. Flow backs to light southwesterly by morning as high pressure slips east.
614 PM EST Thu Nov 30 2017 A weak cold front has crossed through southern IN today and will continue to move through central KY over the next few hours. Lows tonight and tomorrow night will drop into the 30s with highs tomorrow topping out in the lower to mid 50s. High pressure will remain in place across the region through the weekend. Ridging will build in aloft.
Winds go light tonight, do sided closer to the MET/MAV guidance which was cooler than SuperBlend, etc. Sided again towards the warmer MAV, but went a degree or two cooler based on models projections of mid and high cloud cover through the first part of the day, at least.
Cooler tonight. /issued 520 PM CST Thu Nov 30 2017/ A weak cold front has cleared most of the Midsouth with temperatures ranging from near 60 in Paris, TN to the low 70s in north MS.
Surface return flow has set in, which means the high pressure that is over Western Kansas is starting to move east. Despite H85 CAA transitioning to WAA late this afternoon, plus light winds, dry ground and few clouds, have only increased highs a degree or two to at or just below MOS guidance to the low to mid 50s.
High pressure will keep central Indiana dry with above normal temperatures through the weekend. With high pressure moving in, winds will diminish overnight.
942 PM EST Thu Nov 30 2017 A cold front is positioned along the Cumberland Plateau at the moment, tracking east.
823 PM EST Thu Nov 30 2017 An update was sent earlier this evening to include a sharper cutoff of the precip as the cold front moves away to the southeast tonight. This coupled with a upper level trough axis will continue to see showers develop across central and eastern Kentucky this afternoon and evening. These showers and the cold front will progress through and out of the area tonight. Then high pressure will build east in the wake of this front and this will be coupled with deep layer of dry air. This high pressure will continue to build, as we round out the short term period.
Small update for this evening to expand fog into the Western Basin toward the Moses Lake Area, Waterville Plateau, Grand Coulee, and along the Highway 2 corridor into Lincoln County. At this time, only Moses Lake and Waterville are carrying freezing temperatures while most other locations are in the mid 30s.
At the surface, a lee trough will slowly move out of eastern Colorado tonight and into northwest Kansas on Friday. Surface winds will shift to northerly behind the trough in most locations by Friday afternoon. Lows tonight might dip into the teens in favored locations in Colorado, elsewhere in the low to mid 20s.
A feeble cold front, located near I-65 at 3 pm, was continuing to limp steadily eastward this afternoon.