Aikyam-Lab/Synoptic-Bench huggingface dataset:
442 AM CST Sat Nov 26 2016 Although the fog and freezing fog has been slow to develop very far west yet, there are some low visibilities across northeast Oklahoma and the HRRR is still somewhat aggressive in fog formation across the far northeastern portions of the forecast area through sunrise. At this time, we will let the freezing fog advisory continue where it is currently located and continue to watch the trends.
512 AM CST Sat Nov 26 2016 500 mb ridge is moving east across the north central CONUS. A strong upper low approaching from the southwest will bring rain into the area Sunday afternoon, with rain chances increasing steadily from the southwest starting just before noon. However, it can be seen on BUFKIT model soundings that the lower levels will be too cool for surface based convection, so will not mention severe storms, as per the SPC day 2 outlook for this area.
1056 AM EST Sat Nov 26 2016 High pressure is building in across the forecast area. At the upper levels, water vapor imagery indicates a trough along the Eastern Seaboard with cooler air moving in behind the system with forecast highs today ranging from the upper 40s to upper 50s. Chattanooga Airport, TN 56 31 62 42 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 50 27 60 37 / 0 0 0 0 Oak Ridge, TN 53 28 59 37 / 0 0 0 0 Tri Cities Airport, TN 47 26 58 28 / 0 0 0 0.
422 AM MST Sat Nov 26 2016 Current surface map shows weak trof across the western Dakotas. Upper level ridge located across the northern plains with mid/high clouds across the forecast area. Another warm day across the area as low level thermal ridge. Upper ridge breaks down tonight with strong trof approaches the Rockies. The upper trof moves into the northern plains Sunday. As upper low closes off, best chance of precipitation will be along eastern portion of forecast area Sunday night.
A trough of low pressure will begin to push through the region in the morning that will bring cooler temperatures and a threat for light snow. Initially the higher valleys (above 3000 feet) of north-central Idaho as well as Lookout and Lolo Passes will be impacted.
This low will bring gusty winds to the area today with increasing precipitation for some western areas this afternoon. Widespread showers will develop this evening into early Sunday morning as an upper level trough will across the area. An upper level ridge centered well offshore, will gradually build inland on Sunday.
710 AM EST Sat Nov 26 2016 A cold front will move off the coast this morning. High pressure will pass through from the west this weekend.
556 AM EST Sat Nov 26 2016 A cold front will result in rain and snow shower chances today before high pressure returns dry weather for Sunday. A few snow showers in upslope flow in the ridges are also possible, though the flow is not optimal for any significant accumulation. There remains a slight chance of freezing drizzle early this morning in the ridges with the saturated layer below the snow growth region. Building high pressure should bring a clearing trend for Sunday.
Visibilities have been reduced in fog and freezing fog across northeastern Oklahoma. The fog/freezing fog will be possible at KPNC and have kept a TEMPO group with 3SM BR there this morning. /issued 442 AM CST Sat Nov 26 2016/ Although the fog and freezing fog has been slow to develop very far west yet, there are some low visibilities across northeast Oklahoma and the HRRR is still somewhat aggressive in fog formation across the far northeastern portions of the forecast area through sunrise. At this time, we will let the freezing fog advisory continue where it is currently located and continue to watch the trends.
In addition, a cold front will bring much colder temperatures to the state, generally ranging 10 to 15 degrees colder.
619 AM EST Sat Nov 26 2016 A pressure ridge approaching from the west today will extend through the forecast area tonight and Sunday.
956 AM EST Sat Nov 26 2016 A pressure ridge approaching from the west today will extend through the forecast area tonight and Sunday.
With dry air in the low levels, risk of fog will be minimal, so did not include at any terminal.
An upper trough along 130W longitude will gradually shift east towards the west coast today. This trough will elongate and split as it moves onshore and through the region tonight into Sunday.
Today Through Sunday Night It is another morning with areas of fog, and some freezing fog in parts of northwest Arkansas. Have Dense Fog and Freezing Fog Advisories going until 900 am CST. Strong high pressure will be over the region to begin the short term. The high will keep it dry today. At the same time, the high will shift to the east with time, and winds will become more southerly. As the high exits, a powerful storm system will track from the central Plains to the upper Midwest Sunday/Sunday night. As this happens, a cold front will make its way toward the region from the west.
847 AM EST Sat Nov 26 2016 A cold front will move off the coast this morning. High pressure will pass through from the west this weekend.
341 AM MST Sat Nov 26 2016 Today, the upper level ridge over eastern Colorado will shift to the east with a drier southwesterly flow aloft. The strong trough that will move onto the southern California coast later today will move east-northeast and track across Colorado Sunday. Flow aloft behind the trough turns westerly late Sunday and northwest Sunday night.
1040 AM EST Sat Nov 26 2016 High pressure is sliding southeast through the Lower Mississippi River Valley. This diagnosis places a cold frontal boundary across north- central Florida, demarcating a fresh batch of continental air. Breezes will freshen and turn to the north-northeast tonight and tomorrow morning as a dry cold front works through South Florida and the Florida Keys.
719 AM EST Sat Nov 26 2016 Light wind will begin to increase up to around 10 kts this morning, and turn northeast,as high pressure to the east weakens ahead of an approaching cold front. A weak cold front will push southward down the north/central portion of Florida during the afternoon. Dry weather will generally prevail through mid week, behind the frontal passage, as a ridge of high pressure draws near. This ridge will allow for the flow to become east/southeast and breezy at times with a tightening pressure gradient, along with increasing low- level moisture.
914 AM EST Sat Nov 26 2016 Water vapor imagery and upper air analysis this morning shows a trough over the eastern part of the country, with ridging over the central U. and another trough/closed low entering the northwest. At the surface, a cold front currently over northern Florida will continue to slowly push southeast through the day, making it through the forecast area later this afternoon. No rain is expected with its passage, but the cloud cover will remain until late today into the first part of tonight when high pressure starts to build in over the southeast.
a weak cold front currently along KSGJ- KGNV line will continue moving slowly southeast. Somewhat cooler temps behind the front. Winds will become northwest to north today as cold front passes through the coastal waters.
Afternoon highs will remain in the lower 80s in most locations across South Florida with some periods of increasing cloud cover. /issued 719 AM EST Sat Nov 26 2016/ Light wind will begin to increase up to around 10 kts this morning, and turn northeast,as high pressure to the east weakens ahead of an approaching cold front. A weak cold front will push southward down the north/central portion of Florida during the afternoon. Dry weather will generally prevail through mid week, behind the frontal passage, as a ridge of high pressure draws near. This ridge will allow for the flow to become east/southeast and breezy at times with a tightening pressure gradient, along with increasing low- level moisture.
407 AM CST Sat Nov 26 2016 06Z surface data has high pressure from the Great Lakes into the lower Mississippi Valley. The light winds from the high pressure has allowed patchy fog to develop across parts of the area. Quiet and dry conditions will be seen today and tonight as the high pressure moves into the Ohio Valley.
Synoptic Setup: short term begins with a a ridge running from the FOur Corners through the northern US Frontrange and into southern Alberta and Saskatchewan. Farther west, a large high amplitude, narrow trough runs up the coast of California and the Pacific Northwest and turns inland over northern British Columbia. Today through Sunday: The base and more energetic portion of the trough to the west will move through the Four Corners. This will amplify a mesoscale ridge across the region today leading to variably cloudy skies and dry conditions which should easily last through tonight. By Sunday morning a surface cold front will move through which coincides with the top of the trough moving through aloft. However, with no moisture and the exiting ridge still having a stabilizing affect/influence conditions should remain dry if maybe a bit cooler.
Synoptic Setup: short term begins with a a ridge running from the FOur Corners through the northern US Frontrange and into southern Alberta and Saskatchewan. Farther West, a large high amplitude, narrow trough runs up the coast of California and the Pacific Northwest and turns inland over northern British Columbia. Today through Sunday: The base and more energetic portion of the trough to teh west will move through the Four Corners. this will amplify a mesoscale ridge across th region Today leading to variably cloudy skies and dry conditions wich should easily last through tonight. By Sunday morning a surface cold front will move through which coinsides with the top fo the trough moving through aloft. However with no moisture and the exitiing ridge still having a stabilizing affect/influence conditions should remain Dry if maybe a bit cooler.
Latest WPC/RAP40 analysis shows the cold front just south of the I-10 with its attendant mid lvl trof approaching the Mid Atlc/SE coast. Primary difference over central FL is the H100-H70 mean winds which have veered from E/SE to W/NW due to the passage of a prefrontal trof. Steadily deteriorating conditions thru sunset as a cold front over N FL presses into lcl Atlc.
907 AM EST Sat Nov 26 2016 A cold front will result in rain and snow shower chances today before high pressure returns dry weather for Sunday. Also added fog back into the high terrain as several web cameras through the region show low visibility. At this point, it appears the threat for freezing drizzle has diminished as most of what is falling in the ridges is snow based on local web cams and obs. A few snow showers in upslope flow in the ridges are also possible, though the flow is not optimal for any significant accumulation. Building high pressure should bring a clearing trend for Sunday.
933 AM CST Sat Nov 26 2016 Removed fog/freezing fog mention this morning. Visibilities have been reduced in fog and freezing fog across northeastern Oklahoma. The fog/freezing fog will be possible at KPNC and have kept a TEMPO group with 3SM BR there this morning. /issued 442 AM CST Sat Nov 26 2016/ Although the fog and freezing fog has been slow to develop very far west yet, there are some low visibilities across northeast Oklahoma and the HRRR is still somewhat aggressive in fog formation across the far northeastern portions of the forecast area through sunrise. At this time, we will let the freezing fog advisory continue where it is currently located and continue to watch the trends.
252 AM CDT Tue Apr 4 2017 Upper trough that has been producing the periodic showers overnight continues to shift eastward early this morning. The upper low will begin to reorganize over the region Wednesday evening as energy begins to be drawn southward from a wave in the northern flow.
A strong cold front is finally ready to move in tomorrow with another windy afternoon expected. Rain showers or possibly thunderstorms will have the best chance in the I-30 corridor and mainly overnight ahead of approaching cold front. Today will be the last warm day for a few with temperatures cooler than average for a nice change of pace.
A cold front will be digging down behind the trough, and models are all in decent agreement on breaking out some precip near that boundary this afternoon and evening. The best precip chances will shift southward later tonight as the cold front digs down across the area, with some showers lingering over the far southern counties by Wednesday morning. Have highs a few degrees cooler than yesterday in the upper 40s to mid 50s. Cold air advection will be stronger tonight and that should drop temps back below the freezing mark in all but the far south.
Main circulation affecting our CWA today involves northern branch of a trough axis from NE Montana into western Wyoming. We see no reason to cancel this highlight at this time, and will monitor trends later tonight to see if it needs to be extended a few hours. Strong ridging and anticyclonic flow will spread in from the west tonight.
A trough extended west from the low into the Upper Mississippi River. This trough continued to produce rain across the region. 00z models continue to show that the trough will move quickly east of the area this morning. The combination of strong subsidence in the wake of this trough and drier air advecting into the region will allow skies to gradually clear this afternoon. For tonight, a low pressure system will move northeast from eastern Oklahoma into central Missouri. On Wednesday, the low pressure area will move northeast from central Missouri northeast into central Indiana. The highest totals will be found in far southern Grant County in southwest Wisconsin. Meanwhile, a trough on the western periphery of the long wave trough will provide a chance of instability showers across the remainder of the area for Wednesday afternoon and evening.
Visible satellite showed a rapid west-to-east clearing of the high-level cloud canopy from earlier rain and thunderstorms. A swath of subsidence immediately behind the departing complex is aiding in a zone of sunshine, though just to the west of this axis we're seeing cumulus inbound in association with wrap-around moisture/lift from the parent low pressure northwest of the region. A cold front has stalled from just west of ANB to just west of MGM. Additionally, if it actually clears briefly, not much sun was had after the rain and expect the low clouds and fog anyway.
407 AM EDT Tue Apr 4 2017 Upper trough exits this morning. Weak high pressure tonight.
Upper trough will cross the region today, as the upper low develops over southern KS. Showers and thunderstorms will dissipate this evening as the trough shifts eastward. Temperatures will warm into the 50s and skies will clear as an upper ridge builds.
An upper low will develop over New Mexico Tuesday morning and move northeast across the Great Plains to the upper Mississippi River by Wednesday afternoon.
An upper low is expected to move NE across parts of the southern and central Plains Tuesday. Showers/storms are expected to move into NW/N portions of the fa tonight into Tuesday morning as the upper low approaches the area. Rain chances will end Tuesday night into Wednesday morning as the upper low begins to move away from the area.
A weak weather disturbance will brush northern Utah this morning, followed by the return of high pressure midweek.
353 AM PDT Tue Apr 4 2017 Warmer today and Wednesday as high pressure aloft strengthens near the West Coast with the marine layer becoming shallower.
410 AM CDT Tue Apr 4 2017 Weak cyclonic flow in the wake of the departing cyclone will dominate the region this morning, with stratus persisting across northern parts of the CWA. Meanwhile mid and high level moisture will begin spreading into the area as well from the west this morning in advance of the upper low/trof exiting the 4 corners area. While I certainly think the potential is realistic, I think the eastward extent/coverage and amounts look a bit on the high side. While instability won't be tremendous, especially to the north of the retreating warm front, the strong forcing should compensate.
Early morning infrared satellite imagery is showing a band of clouds across the northeastern Gulf of Mexico and northern Florida associated with a stalling cold front. Otherwise, it will be another warm day south of the main area of convection, with highs over the interior forecast to reach into the low 90s again. By Wednesday afternoon, a strong upper level trough will be digging into the southern Mississippi River valley, pushing a much stronger cold front through the northern Gulf Coast.
Meanwhile, Sfc cyclogenesis wl occur ovr W TX today, with the low center expected to track into ERN OK late today, then moving into MO tngt and Wed.
An upper trough will exit our region to the east today and be followed by upper high pressure ridging building-in from the Pac NW through Wednesday.
Otherwise, the fog will give way to clear skies and a very pleasant day with temperatures headed into the lower 80's by this afternoon thanks to a relatively weak and short lived ridge across the area. Cloud cover will begin to increase late this evening as our next cold front approaches. Behind the front, winds will turn breezy out of the northwest as cooler, drier air is ushered into the region.
A cold front has moved into northeast Oklahoma this morning as well. Temperatures on Wednesday will be much cooler across a good portion of the area with gusty northerly winds in the wake of the departing storm system. At or below normal temperatures continue through the work week as high pressure builds in from the north.
Cloud coiver will gradually increase overnight as a warm front pushes toward the region from the southwest. Biggest weather story for this forecast will be the severe weather expected to roll through the region on Wednesday, and the colder air behind this system that could bring some very light snow to the higher elevations. Ahead of this low a warm front should be somewhere in our vicinity and locations south of this will have the best chances to see strong to severe storms on Wednesday.
353 AM CDT Tue Apr 4 2017 The cold front that moved through yesterday is stalled over the gulf this morning poised to retreat back into the area as a warm front today. The stronger sustaining and substantial support will begin to move into the picture early Wednesday in the form of a cold front with plenty of dynamic and thermal support. The intializing area looks to be Mississippi and Southeast Louisiana mainly along the warm frontal boundary. The warm front will begin to move north this morning. This activity should move into the area from the south by this evening and continue to plague the area through the night until the cold front moves through by Wed morning.
635 AM EDT Tue Apr 4 2017 Upper trough exits this morning. Weak high pressure tonight.
353 AM CDT Tue Apr 4 2017 A narrow ridge of high pressure will bring a dry and mild day to much of the quad state region today, with most locations topping out in the 70s this afternoon. A pre-frontal surface trof should be the main focus of the storm threat. The fast moving trof should be east of the region by sunset. MUCAPES of 1000-1500 J/KG ahead of the trof with surface dew points approaching 60 degrees should supply at least weak to moderate instability. SPC has now expanded the marginal and slight risk areas back closer to the MS River, close to where the pre-frontal trof is expected to be located by early afternoon. After the storm threat ends late Wednesday afternoon, the main cold front will swing through Wednesday night, as chilly high pressure dips south out of Canada.
345 AM EDT Tue Apr 4 2017 High pressure dominating the weather pattern over South Florida begins to weaken and shift east as the low pressure system over the Central Plains drifts towards the Northeast Plains. This low is providing severe weather over portion of the Southern Plains into the Tennessee and Ohio Valleys.
Will start off with low pressure exiting the lower Great Lakes as an additional area of low pressure becomes better organized across northern TX/OK. An inverted trough will extend from this feature, up through eastern SD tonight, as the low itself shifts from OK to southern MO Wednesday.
327 AM EDT Tue Apr 4 2017 High pressure dominating the weather pattern over South Florida begins to weaken and shift east as the low pressure system over the Central Plains drifts towards the Northeast Plains. This low is providing severe weather over portion of the Southern Plains into the Tennessee and Ohio Valleys.
202 AM EDT Tue Apr 4 2017 A low pressure system will bring precipitation chances to the area through Tuesday. High pressure will briefly work into the region by Tuesday evening, however another system will begin to work into the region on Wednesday. A trough will move through later tonight which could bring a period of gusty winds. Some isolated to scattered shower activity will be present during the morning hours on Tuesday, however expect precipitation activity to taper off through the day as high pressure begins to build into the region. Winds will subside by Tuesday evening as high pressure builds in. This will keep temperatures a little cooler than today with high temperatures in the middle 50s to middle 60s. Low pressure in the lower midwest will slowly work into the Ohio Valley on Wednesday.
The combination of water vapor and regional radar shows two low pressure centers, one circulation was located over south central Montana which is forecast to shift south today and merge/feed into the southern branch. Based on the height of radar reflectivitys, this is a reflection of the 850mb-700mb upper low. Main theme today is this mid/upper low will shift east into central ND through the day today before digging into the southern James River Valley this evening/tonight. Expecting the highest pops closest to the mid level low circulation this morning, then becoming scattered this afternoon as the atmosphere further destabilizes.
With downslope west winds, have highs in the lower to mid 80s, and it is possible some areas may rise into the upper 80s. A cold front will move into the northern Big Country around 8 PM and through West Central Texas by 1 AM. Much cooler on Wednesday behind the cold front, with highs only in the upper 60s to around 70.
419 AM EDT Tue Apr 4 2017 Low pressure over the Great Lakes will move northeast and away from the Mid-Atlantic region today.
Leading wave at the bottom of the trough over New Mexico with diffluence aloft and resultant lift over eastern Colorado with radar mosaic showing showers developing over southeast Colorado and lifting to the northeast.
534 AM CDT Tue Apr 4 2017 Upper trough that has been producing the periodic showers overnight continues to shift eastward early this morning. The upper low will begin to reorganize over the region Wednesday evening as energy begins to be drawn southward from a wave in the northern flow.
Clouds begin to increase and lower across the area this evening as a warm front over the Gulf begins to approach the area from the south.
Tonight the main upper level trough will move from northern Oklahoma to central Missouri. The upper level low will move east of the area by Wednesday evening with conditions finally drying out.
545 AM EDT Tue Apr 4 2017 Scattered showers will linger today as one low pressure system departs.
Much cooler conditions are expected today as strong cold air advection sets up behind cold front. Western half of forecast area expected to clear first, with low temperatures at or below freezing.
Meanwhile an intense mid level jet will streak into the region while the low level jet cranks up later today.