Aikyam-Lab/Synoptic-Bench huggingface dataset:
then heights rise as the next upper ridge translates in from the west for Monday. Skies will clear out this evening, but clouds will be on the increase again towards morning as there is plenty of mid/high level moisture within the ridge to overspread the area. There will still be some afternoon breezes across the mountains, but the lee trough on Monday won't be as deep and sfc pressure gradient not as strong. Still looking at another mild day for the lower elevations with highs in the lower to mid 50s across the plains. with generally teens, 20s and 30s for the higher elevations.
704 PM EST Sun Jan 3 2021 High pressure will build into the region tonight.
532 PM CST Sun Jan 3 2021 (This evening through Monday) Freezing fog may develop once again tonight--especially in areas where snow cover kept temperatures cooler this afternoon. Would anticipate any freezing fog to be patchy, but observation trends will have to be monitored tonight. Otherwise, warmer weather will continue on Monday as remnant snow cover continues to melt. Temperatures may still be a few degrees cooler here than surrounding locations tomorrow afternoon.
1048 PM EST Sun Jan 3 2021 High pressure will remain over the area through the middle of this week.
Latest GOES Water Vapor channel shows a closed low over south-central MO at this hour moving east. Temperatures range from the lower 50s to upper 40s with a light southerly winds.
218 AM CST Mon Jan 4 2021 An upper low will move across the region quietly early today. High pressure maintains dry weather Tuesday through Tuesday night.
1106 PM MST Sun Jan 3 2021 This evening's cold front and associated light precip are nearly through the CWA. Cold fnt associated with this trof is currently analyzed from srn MB swwd into MT and ID, with a prefrontal trof analyzed from the wrn Dakotas swd along the High Plains. Closer to home, it's a pleasant early January day at the moment, with temps generally in the 40s and 50s aside from cooler conditions in portions of the Black Hills and nern WY.
Cancelled the High Wind Warning which was in effect. A disturbance similar in feel and timing to the last two pacific systems that contained freezing rain is again expected. Based on past experience, while rain is forecasted to fall by the basic ForecastBuilder/NBM output the consideration of frozen ground will lead to freezing rain and slick surfaces with black ice Tuesday morning. Therefore, have coped over Pot_Rain grids to Pot_FreezingRain where MinTs dropped below freezing to get the freezing rain into the forecast over a wider area during this time period.
Fog or freezing fog is possible through late morning, with best chances west of US 31. (Today through Tuesday) Issued at 149 AM EST Mon Jan 4 2021 High pressure aloft and very dry air aloft have created a strong low-level inversion that has trapped moisture near the surface. But if we do clear at all this morning, areas of dense freezing fog could develop, as is currently occuring across northern and western Illinois. An elongated northern stream trough will swing through the area tonight into Tuesday morning. Better lift ahead of the trough axis may initially saturate the atmosphere high enough up to reach the DGZ and produce snow, but the moisture quickly becomes more shallow overnight, and drizzle or freezing drizzle become more likely. Precipitation will then end by afternoon, and temperatures should rise into the mid-30s, mitigating any surface freezing.
A weak cold front will move across during Monday afternoon. High pressure is moving across Louisiana this afternoon and is roughly centered near the Baton Rouge area. High pressure will rebuild over the area for Tuesday with a slight cool down expected.
Patchy drizzle or freezing drizzle (depending on sfc temperatures) will be possible today with moisture trapped under ridging, subtle lift, and BL temps too warm for cloud ice. Light patchy precipitation will continue overnight with better coverage Tuesday/Tuesday night as upper troughing slides in overhead.
For today we will have a wind shift to the northwest as a passing 700 mb trough moves into central and eastern Kansas. Partly cloudy skies and dry conditions are expected through Tuesday as an upper level ridge slides across the Plains. Breezy southerly winds are expected Tuesday as a trough of low pressure moves through the western United States.
Low temperatures this morning will be in the low 30s across much of north and central Georgia and in the upper 20s in the far northeastern mountains. Temperatures are forecast to decrease into the mid 30s in the higher elevations of far northeast Georgia on Tuesday morning, so there is a slight chance for a rain/snow mix in the highest elevations just before sunrise. After the disturbances move eastward away from the area and towards the mid-Atlantic coast, an upper level ridge will build in over the southeastern CONUS on Tuesday and remain in place through the end of the short term period.
322 AM EST Mon Jan 4 2021 Weak low pressure moving off the New England coast will continue to produce spotty light snow, some drizzle and freezing drizzle today. The greatest chance of freezing drizzle and some light icing will be mainly across the higher terrain of the western Southern Tier this morning.
VFR conditions will prevail next 24 hours, w/a few high clouds and a relatively weak cold front oozing into the area Monday. Temps will cool off no more than 5 degrees from today's highs across PB/SE NM, and Trans Pecos high temps may even be a few degrees warmer. Residual snow cover across e- se may continue to result in locally cooler temps. There will be a nice warm-up Tue ahead of the next mid-level trof and assocd cold front, 60-65 most areas. Aforementioned trof/front will pass thru the area Wed AM before sunrise and tightest MSLP gradient will be around 12Z Wed. There will be a bit of a secondary surge of cooler air Thur as a deep cold closed low drops s into MS Valley and even into Fri surface ridging will maintain a cool ely low-level component.
The inherited forecast had the right warmer west-to-cooler east theme for tonight's lows but I nudged things down another degree or two in the east given current ob trends. A mid level closed low will begin to cross into the MidSouth over night, dragging a weak surface front toward the ArkLaMiss by tomorrow. Expect lows to fall into the low 40s in the west and mid 30s in the east. Highs will be a few degrees warmer than today.
1050 PM CST Sun Jan 3 2021 (This evening through Monday) Visible satellite early this afternoon showed sunny skies across the region, while water vapor satellite showed an upper level trough moving across eastern OK/eastern KS. This stronger thermal ridge and warm downsloping west surface winds were resulting in 12 pm temperatures which were 5-8 degrees warmer than 24 hours ago. Expect highs this afternoon mainly in the low to mid 60s. With weaker winds overnight and mostly clear skies, expect enhanced radiational cooling area-wide, resulting in cooler lows in the upper 20s to low 30s. A weak and dry cold front will move through the region Monday morning through the afternoon hours.
1005 PM EST Sun Jan 3 2021 The cold front has pushed south of the FA but weak isentropic lift behind the front is keeping some low clouds in place across Okeechobee and Treasure coast. Although it will feel chilly after our spate of warmer weather, these values are very close to normal for early Jan. The cold front has pushed south of the waters this evening and a NW flow 13-17 knots will develop overnight into Monday.
207 AM CST Mon Jan 4 2021 Widespread fog/freezing fog noted across parts of eastern KS into western MO, with some patchy areas into far northeast OK/northwest AR. Otherwise, warmer weather is expected today and Tuesday with rising mid-level heights across the southern Plains. NBM is likely a bit cool with highs the next 2 days and blended in some of the warmer NAM/GFS guidance.
1100 PM CST Sun Jan 3 2021 For the 04/06Z TAF period, cirrus clouds will be returning over our terminal airspace after midnight through early Monday ahead of a weak cold front that will begin moving into the region. In addition, some cloud cover will gradually being to return after midnight in advance of a weak cold front that will shift across the region on Monday.
340 AM EST Mon Jan 4 2021 High pressure will expand north up the Ohio Valley through today. A weak trough will move east across the Great Lakes Region on Tuesday.
While it has become rather breezy across the west, the cold front and strongest pressure rises remain well back into central and even western Montana. Forecast highlights in the short term period will be gusty winds associated with a cold frontal passage mainly this evening, along with slight chances for some light precipitation. Mid level wave will advance east across the Northern Plains tonight, dragging a cold front through western and central ND this evening, and eastern ND overnight. High pressure builds into the region from west to east overnight through Monday morning, clearing the sky and resulting in diminishing winds. Cooler for Monday but still mild with highs from the 30s north and east to the mid 40s southwest. A cold front continues to swing through the area and will be out of the region by 12z.
Temperatures overnight are expected to drop into the low 40s. High temperatures today are forecast to be in the low 60s for much of the area.
For today we will have a wind shift to the northwest as a passing 700 mb trough moves into central and eastern Kansas.
Patchy fog and freezing fog will be possible tonight and early Monday morning behind the vort max as the temperature and dewpoint spread narrows. Northwesterly flow will return to the region on Monday and Tuesday as high pressure builds in from the west.
Temperatures are already in the low-to-mid 30s, and I wouldn't be shocked if some locations dropped into the upper 20s tonight. This will likely lead to frost developing overnight, and possibly some fog/freezing fog, especially near rivers and lakes. Any lingering fog/freezing fog should quickly diminish/lift with the onset of daytime heating Mon morning, as clouds continue to spread into the area from the WSW. High pressure out of the Plains states will then become reinforced across much of the region on Tue and continue into Tue night. Lows early Tue look to trend mainly in the mid 30s for most areas, before rebounding into the lower/mid 50s later in the day.
1043 PM CST Sun Jan 3 2021 (This evening through Monday) Freezing fog may develop once again tonight--especially in areas where snow cover kept temperatures cooler this afternoon. Would anticipate any freezing fog to be patchy, but observation trends will have to be monitored tonight. Otherwise, warmer weather will continue on Monday as remnant snow cover continues to melt. Temperatures may still be a few degrees cooler here than surrounding locations tomorrow afternoon.
A weak trough of low pressure will move through western Kansas this evening shifting southwestern winds to the northwest. Lee troughing then develops tomorrow shifting winds back to a southerly direction. As for temperatures, lows tonight look to range from the upper 20s to low 30s with highs tomorrow reaching into the low to mid 50s. Partly cloudy skies and dry conditions are expected through Tuesday as an upper level ridge slides across the Plains. Breezy southerly winds are expected Tuesday as a trough of low pressure moves through the western United States.
1031 PM EST Sun Jan 3 2021 High pressure will remain over the area through the middle of this week.
Mondays short wave ridge will slowly shift east Tuesday as the first in a series of troughs begins moves towards the area.
1232 AM EST Mon Jan 4 2021 High pressure will remain over the area through the middle of this week.
809 PM MST Sun Jan 3 2021 Showers and winds were decreasing over the area late this evening as the cold front that brought strong winds earlier, was exiting the region. While the ascent disappears soon after the frontal passage, so do some the low-level winds. A subtle sign of freezing rain also exists for Tuesday morning, but the signal isn't strong enough to be included in the forecast as of yet.
Seasonably Cool High Pressure will build in from the West Today with Mostly Sunny skies (just a few high clouds at times) and temps will only rebound close to normal values for early January in the lower to middle 60s for most locations with Northwest surface winds around 10 mph through the day. For tonight a weak surface trof will pass north of the region across the SE US during the overnight hours, but not much impact to the local area with Mostly Clear skies for NE FL through the night and possible a few clouds across inland SE GA towards morning. The mostly clear skies will still allow for Min Temps to fall into the upper 30s over inland areas with some patchy frost still possible in normally colder locations, while lows will be in the lower/middle 40s along the Atlc Coast.
Fog/freezing fog will be possible through just after sunrise as temps will start to warm up pretty quickly with southerly winds and sunshine on the way to highs in the mid 50s. PVA ahead of the trough will increase cloud cover today and bring some chances for rain to the Plateau around midnight through sunrise Tuesday.
Fog or freezing fog is possible through late Monday morning, with best chances west of US 31. Mid level subsidence in wake of this morning's system will strengthen the low level thermal inversion and help trap in low level moisture into tonight and Monday morning. Otherwise, lingering boundary layer moisture and forcing with the trough may produce some dz/fzdz during this time which could create some minor travel issues Tuesday morning. The main question for tonights forecast looks to be whether or not we will get freezing fog, best chances at KSBN.
952 PM CST Sun Jan 3 2021 Areas of freezing fog remain possible overnight into early Monday morning, especially across far northeast Oklahoma, where conditions will need to be monitored for possible headlines later.
301 AM EST Mon Jan 4 2021 Synopsis/Discussion/Marine - Chance for wintry precipitation tonight - Continued cloudy to mostly cloudy with fog possible at times - Chance for wintry precipitation tonight Guidance continues to show light precipitation moving in tonight as a cold front drops down through the area. a small risk for freezing drizzle could arise. For now we are not confident enough to feature the freezing drizzle in the forecast. - Continued cloudy to mostly cloudy with fog possible at times Looking at the model overviews in Bufkit shows the low level rh remaining high. If thicker fog could form and temperatures were near or below freezing. This is ahead of the cold front.
High pressure will bring dry and warmer weather through Monday. Expect slight cooling and breezy afternoon winds Tuesday and towards the end of the week as a series of cold fronts move through the Great Basin. Northwesterly flow ahead of a weak ridge of high pressure has pushed mid and high level clouds across the state today. More of the same can be expected on Monday with high temperatures a couple degrees warmer in most locations. The ridge will push east of the state by Monday evening as a dry cold front approaches the area. The dry cold front will push through the area Tuesday, bringing slightly cooler temperatures and locally breezy conditions.
Warmer onshore flow and clear skies will allow temperatures to rise into the low to mid 60s over the forecast area, a bit above seasonal norms. The slower influx of cooler air will allow for a warmer night than tonight, with low temperatures ranging from the upper 30s northwest of the Alabama River to mid 40s along the coast.
While it has become rather breezy across the west, the cold front and strongest pressure rises remain well back into central and even western Montana. Forecast highlights in the short term period will be gusty winds associated with a cold frontal passage mainly this evening, along with slight chances for some light precipitation. Mid level wave will advance east across the Northern Plains tonight, dragging a cold front through western and central ND this evening, and eastern ND overnight. High pressure builds into the region from west to east overnight through Monday morning, clearing the sky and resulting in diminishing winds. Cooler for Monday but still mild with highs from the 30s north and east to the mid 40s southwest. A cold front will approach the west tonight.
1149 PM EST Sun Jan 3 2021 Cooler air behind a cold front will move into the Carolinas tonight through mid week.
So far, there haven't been any observations of fog/freezing for but expect fog/freezing fog will continue to be possible early this morning, mainly near area lakes and rivers. In the upper levels, there is a trough currently moving into the Tennessee River Valley with another trough diving southeastward into the northern Plains. A ridge exists across the western CONUS. At the surface, high pressure is in place with clear skies and calm winds early this morning. The trough currently across the norther Plains will continue to the southeast today into the mid and upper Mississippi River Valley by the end of the day. A weak front associated with this trough will dive to the southeast. Upper level heights will rise on Tuesday as ridging builds in from the west.
There's a pretty wide range in temperatures overnight with a couple Hill Country spots approaching freezing, while many areas are still in the upper 40s and lower 50s. The resultant downsloping, combined with clear skies and warmer 850mb temps in a lower atmosphere with lapse rates consistent with decent, but maybe not fantastic mixing will still help temperatures rise into the mid to potentially upper 70s today for much of the region. Cooler highs in the mid 60s to low 70s are forecast for Tuesday, still 5 or so degrees above 30-yr normals.
321 AM EST Mon Jan 4 2021 High pressure will remain over the area through the middle of the week.
1133 PM CST Sun Jan 3 2021 The extent of fog and potential impact of freezing fog is the short term forecast challenge. An additional concern will be temperatures dropping below freezing toward morning resulting in the potential for some slick roads during the morning commute. The split upper flow will merge to form an upper level ridge forming over the Rockies on Monday. Locally this will result in south winds ushering in a return of warmer air.
The upper level pattern will be quite active this week with a series of troughs and upper lows. Looking at soundings along the plateau, freezing levels will be about 1200-1500 ft AGL with surface temperatures around 35-38 degrees. I wouldn't be surprised if the highest elevations see a few flakes mix in around 12z Tuesday, however.
327 AM EST Mon Jan 4 2021 Cooler air will move into the Carolinas through mid week.
105 AM EST Mon Jan 4 2021 High pressure will build into the region tonight. A weak trough of low pressure will cross the area Monday night into Tuesday.
A few slick spots are possible for the morning commute, especially over northeast South Dakota where surface temperatures have been below freezing. S/W ridging then builds across the region for today and tonight, with dry conditions expected. On Tuesday another upper trof moves into the region, with some pcpn expected out west in the afternoon, spreading across the region Tuesday night.
214 AM CST Mon Jan 4 2021 Main focus is with the mid-week upper trof/low which deepens across the central Plains/Ozarks with chances for rain/snow. However, milder westerly flow off the high Plains behind a frontal passage should advect/scour this out quicker before mid-morning, so the Dense Fog Advisory may be cancelled early. Otherwise, the downslope warming will also portend to a warmer day, though snow covered areas will still lag a bit. The progressive upper trof over the Pacific will move inland and across the western CONUS tonight before emerging across the central/northern high Plains Tuesday afternoon.
A cold front moves through the area late tonight and Tuesday morning with enough moisture for a chance of mixed precipitation. Temperatures will fall below freezing this evening in most areas. Meanwhile, there will be an above freezing layer aloft which will result in any precipitation that occurs being a mix of light rain, light freezing rain and light snow depending on surface temperatures and how warm the warm layer aloft ends up being.
/Issued 952 PM CST Sun Jan 3 2021/ Areas of freezing fog remain possible overnight into early Monday morning, especially across far northeast Oklahoma, where conditions will need to be monitored for possible headlines later.
1140 PM EST Sun Jan 3 2021 Aviation - Much of the 7 day forecast on track to be uneventful - Low clouds and fog expected tonight - Weak trough Monday night to bring some light snow -- Much of the 7 day forecast on track to be uneventful -- Most of the 7 day forecast period will feature split upper flow with no major systems expected to impact the forecast area.
In addition, some cloud cover will gradually being to return after midnight in advance of a weak cold front that will shift across the region on Monday. /issued 511 PM CST Sun Jan 3 2021/ High clouds are moving out of our airspace but will be back late tonight from the west briefly ahead of a cold front that will begin moving into our airspace early on Monday and through the day Monday. Under mostly clear skies, temperatures overnight to range from the lower 30s across southeast Oklahoma to the lower 40s across north Louisiana. High temperatures on Monday to climb into the lower 60s.
Meanwhile, mixing associated with the trough passage managed to scour the low stratus layer from the eastern Uinta Basin. However, clouds will be increasing Monday night ahead of the next trough to impact the area. So despite lowered expectations, snow will still be impactful and lead to snowpacked and icy roads, especially in the higher elevations of Colorado.
200 AM CST Mon Jan 4 2021 Dense fog and freezing fog continue to impacts portions of the region this morning. Additionally, freezing fog may create a light glaze on elevated objects. A few slick spots may develop on bridges and overpasses. Warmer temperatures are expected today, especially across portions of southern Missouri where highs will climb into the lower 50s. By Tuesday, a ridge of high pressure will develop across the central CONUS. Afternoon highs on Tuesday will reach into the lower to middle 50s across the Ozarks region with plenty of sunshine.
Light winds are on tap for all areas Monday as broad high pressure moves in aloft.
High pressure at the surface centered over the Gulf South this evening with light south flow around it occurring over the forecast area. A weak cold front will move across during Monday afternoon. High pressure is moving across Louisiana this afternoon and is roughly centered near the Baton Rouge area. High pressure will rebuild over the area for Tuesday with a slight cool down expected.
1247 AM EST Mon Jan 4 2021 High pressure will build over the region through Monday.
Further upstream an upper trough was noted off the west coast with a closed low moving towards the Alaskan panhandle. At the surface, a trough of low pressure stretched from the central plains north into eastern ND. Ahead of this trough, winds have been light enough while skies were clear for widespread dense fog to redevelop across eastern portions of the forecast area. A downslope component to the winds and clearing skies are expected to push highs today back into the lower 50s for snow free areas. Southerly winds and some warm air advection on Tuesday are forecast to continue to moderate temps with most areas in the lower and middle 50s.
1254 AM EST Mon Jan 4 2021 Weak low pressure across the Mid Atlantic will continue to produce spotty light snow and some drizzle and freezing drizzle into Monday. The greatest chance of freezing drizzle and some light icing will be mainly across the higher terrain of the western Southern Tier.