Aikyam-Lab/Synoptic-Bench huggingface dataset:
133 PM CST Tue Dec 1 2020 Tonight and Tomorrow: As a deep low pressure system progresses over the northeastern U. Any high clouds moving into the region could limit full radiational cooling potential, but the usual cold spots in central and eastern parts of Mississippi should still drop to the low 20s. Dry air in the lower levels will be difficult to overcome, so precip intensity should be light.
A cold front will move through the region later this evening and tonight, with a wind shift to the north to follow and remaining low-end windy throughout the overnight hours into Wednesday afternoon. /issued 307 AM CST Tue Dec 1 2020/ A sharp short wave trough will move across the Rockies today influencing our weather for today and tonight. A cold front will then push through late this afternoon into early evening. Breezy winds out of the north will accompany this cold front. The cold front will be south of the FA by tomorrow morning.
Temperatures are generally near or above freezing, as are pavement temperatures. Snow should melt quickly this afternoon given the above freezing temperatures and perhaps peeks of sunshine. Air and pavement temperatures are generally near or above freezing with minimal impacts noted. As the strong upper level low pressure system vacates the area, the lake effect snowfall will continue to wane this afternoon.
107 PM EST Tue Dec 1 2020 Area snow will begin to taper off tonight into Wednesday morning before dry weather returns Wednesday afternoon under building high pressure. Snow will generally continue overnight as moisture wraps around an upper low tracking into southeastern Canada. During this last push, strong upper jet dynamics, steepening low level lapse rates and enough dendritic growth will promote an additional 1-2" of snow across eastern OH and southwestern PA while northwestern PA and the eastern ridge tops could see another 3-6" of snow. Drier air will begin infiltrating the region tonight as the upper low further pulls to the northeast.
928 AM CST Tue Dec 1 2020 Despite a very cold sunrise, we'll transition to a pleasant, albeit slightly cooler than normal, afternoon. Yesterday's upper- level trough continues to move off to the east, leaving a cooler, drier air mass in place across the Mid-South. The surface anticyclone is centered to our south over the Southern MS Valley and winds will back from a more west to southwesterly direction at less than 10 mph. A large upper-level trough will continue east today while high pressure buildings into the Lower Mississippi Valley.
1130 AM CST Tue Dec 1 2020 An amplified ridge remains over the Midwest today, keeping the forecast quiet for the next 24 hours. During the evening, high cloud cover increases as a deep upper-level trough drops southward over the Rockies and High Plains.
A ridge of high pressure extending from Ontario to the Gulf Coast will dominate the weather tonight into Wednesday. Abundant sunshine and light winds will help highs climb into the lower to middle 40s on Wednesday.
High pressure overhead will keep winds light this morning before turning southeasterly this afternoon as the high shifts off to the east. High pressure overhead providing clear skies and calm winds. /issued 328 AM CST Tue Dec 1 2020/ High pressure settling into the area this morning. Temperatures were in the low to mid 30s with the coldest spot. The trend for freezing conditions along and south of the I-10 corridor appears to be on track. Once we get past freezing conditions this morning.
A cold front is expected to arrive at the SE NM terminals by 02/03Z and the remaining TAF sites after 02/06Z. /issued 342 AM CST Tue Dec 1 2020/ Another cold start to the day with temperatures near freezing across the area as a result from radiational cooling. This afternoon surface SW flow will transport warmer air into the area helping bring high temps into the 60s area wide and upper 70s for the Rio Grande making it the warmest day of the week. By late afternoon an upper level trough will dig into the TX panhandle pushing a cold front through the area late tonight and early tomorrow morning ushering in cold NE flow.
The low level flow has switched around to the south and southeast today bringing warmer, moister air back to South Central Texas. Southerly to southeasterly winds will continue tonight and low temperatures on Wednesday will be 15-20 degrees warmer than Tuesday. A cold front that is currently in the Panhandle will move southward tonight and reach our northern border by around sunrise Wednesday. Behind the front, winds will become northwesterly and bring another shot of drier, cooler air.
The ridge to the west will build eastward through the period, maintaining mild and dry weather across the area along with light winds. Ridging will hold to our west with upper troughing over eastern North America. Most of the guidance suggests the western ridge will start to break down after the current seven day forecast period, so we could eventually see somewhat cooler conditions work into the area, although there is no meaningful moisture transport into the region for the foreseeable future. So, although we could eventually get a bit cooler and see some light precipitation, none of that looks to occur until after the current forecast period and there doesn't appear to be anything of significance in the offing.
Some hi-res model guidance is also indicating potential for showers later tonight into Wednesday morning as a cold front moves through, but majority of guidance keeps any precip to our east. /issued 400 AM CST Tue Dec 1 2020/ SHORT TERM (Now through Wednesday): Good radiational cooling overnight has allowed temperatures across portions of the northern ranchlands to drop to around freezing early this morning. Highs today should reach the upper 60s to the lower 70 under mostly sunny skies. The next cold front arrives on Wednesday. Wednesday will be warmer with highs in low to mid 70s early, with temperatures falling into the 60s by late afternoon.
Upper jet diving down the western side of an upper trough over the northern Rockies/High Plains will cause the trough to dig southward through tonight, with a cutoff upper low developing over Oklahoma/north Texas Wednesday. As this upper trough deepens, a weak surface boundary currently near the James River Valley will be pushed farther east, though weakening further as it moves toward I-29 and points east. Unfortunately, with surface temperatures expected to be a few degrees below freezing, some light icing is possible, especially away from the Missouri River Valley where temps may remain a little warmer. Dry and seasonably mild pattern will dominate the mid-long range portion of the forecast, as upper ridge remains in place over the western CONUS.
Dry with Another Cold Front. Well, after a breezy warm-up today, another cold front will again push toward the south, across West Central Texas, beginning later tonight and continuing into Wednesday. Lows tonight will be much warmer than lows this morning and very close to usual early December lows. By mid morning Wednesday, the cold front will be well south of Interstate 10, and all of West Central Texas will have gusty surface winds, from the northwest. That's a pleasant break, from the much warmer that usual temperatures, which dominated last month.
As winds subside after sunset, temperatures will quickly plummet back below freezing with overnight lows bottoming out in the lower 20s. High pressure remains in control of the weather into the middle of the work week. This will allow for a slightly warmer day with afternoon highs in the lower 50s.
245 PM CST Tue Dec 1 2020 Sunny and cold this afternoon with high pressure stretching from northern Minnesota southward into the Gulf of Mexico. Deep low pressure sat over New England with another storm system developing over central Kansas. Quiet weather will continue over the next 24 hours as high pressure shifts eastward tonight. Temperatures will be warmer overnight with lows in the upper teens to lower 20s. High temperatures on Tuesday will be warmer with highs in the lower to mid 40s.
Tomorrow should be warmer, but I've had to come down a little for afternoon highs as we'll start off pretty cold and with weak northeasterly flow, I don't know that much warming will be seen.
As the initial disturbance sinks south and a cold front traverses the area late this afternoon through the evening hours. expect a broad trough to set up over the plains. with a reinforcing upper level low expected to sink south on Wednesday.
An anomalous ridge over the west coast will build into western Canada through midweek. Winds will become light after sunset with dewpoints in the lower 20s. This will really limit instability but will assist in isentropic ascent as a southerly 925 mb jet develops, advecting Gulf moisture poleward over this cooler air mass.
237 PM PST Tue Dec 1 2020 Cooler, but seasonable temperatures persist over the next few days. Valley winds will be relatively light, while ridge winds will be quite breezy. East to northeast winds continue this afternoon, with temperatures running about 10 degrees cooler than yesterday. Ridge winds over the Sierra have calmed down this afternoon, but increase once again overnight with gusts up to 40 mph. Cool, seasonable temperatures and light winds prevail for Wednesday, although a weak low pressure moved into northern California by Wednesday night, bringing in a bit of increasing mid and high clouds.
Mesoanalysis shows a cold front INVOF KLBB, and this could fropa nrn terminals as early as 02Z, resulting in gusty post-frontal winds thru the end of the forecast period. Sustained n winds of 20-25 mph along with gusty conditions are supported by a 90-100nm/4mb MSLP gradient, even down into the Lower Trans Pecos around 09Z/Wed where winds could be sustained 25-30 mph, briefly. Noticeably cooler Wed with highs holding in the 40s in many areas, despite some sunshine. Surface ridging will keep shallow cold air in place Thur PM while the trof aloft holds cold mid-level temps across the area favoring high temps as cold or slightly colder than those on Wed with another hard freeze Fri AM. ECMWF still shows light precip potential Sat into Sun when the upper low shifts into the area, then loiters thru Tue.
This Evening Through Tuesday Upper trof axis is slowly moving eastward across the forecast area. Band of moisture is streaming northward ahead of trof and some snow showers linger behind it over WY and the Black Hills with skies beginning to clear over MT. While surface temperatures will fall below freezing, temperatures aloft may be warm enough for some freezing drizzle, but accumulations will be light. Upper ridge will build after low moves by, with warm and dry conditions for the rest of the forecast.
Sunny and cold this afternoon with high pressure stretching from northern Minnesota southward into the Gulf of Mexico. Deep low pressure sat over New England with another storm system developing over central Kansas. Quiet weather will continue over the next 24 hours as high pressure shifts eastward tonight. Temperatures will be warmer overnight with lows in the upper teens to lower 20s. High temperatures on Tuesday will be warmer with highs in the lower to mid 40s.
Dry conditions are then expected through the remainder of the work week under the influence of high pressure. As the low pressure system exits to our northeast, residual light snowfall will continue to linger across the northern/eastern Ohio counties through the afternoon. Wind speeds will gradually weaken this evening with the retreating low pressure, which will be replaced by high pressure in the Tennessee Valley. Low temps will reach the lower to middle 20s across the entire fa. Temps much bottom out in the upper-teens in a few locations, but generally expect temps in the lower 20s across the broader area. A low pressure system in the lower Plains will start to bring in some increased moisture and cloud coverage across our far southwestern counties early Wednesday morning.
357 PM CST Tue Dec 1 2020 Weak high pressure remains over the northern gulf coast a little while longer as it moves eastward. While it won't quite get as cold as last night for most areas, a few spots, especially in southwest Mississippi, will hit below freezing again tonight. Other places in Louisiana along and north of I-10 may briefly touch freezing tonight. It will then warm up to be a little closer seasonable in the area with the lows in the 50s on Wednesday. A longwave trough in the northwestern part of the CONUS will dig down towards AZ, OK and TX through Wednesday.
Expect continued and gradual improvement from the south and west as that process continues and drier and warmer mid level air further retards snowfall. Building high pressure will yield further improvement as Wednesday progresses but residual cold air and snow cover will limit temperature moderation.
834 PM CST Tue Dec 1 2020 (Issued 834 PM CST Tue Dec 1 2020) A stretch of quiet weather is ahead, as a ridge of high pressure builds into the area. Boxell (Issued 236 PM CST Tue Dec 1 2020) Tonight and Wednesday: Weak high pressure is building into the state this afternoon which is bringing quiet weather to the area tonight and Wednesday.
Expect gradual improvement from the south and west though as the low digs northward and drier and warmer mid level air begins to retard snowfall. Building high pressure will yield further improvement as Wednesday progresses but residual cold air and snow cover will limit temperature moderation.
409 PM EST Tue Dec 1 2020 Cold high pressure will build into central NC through mid-week. Another low pressure system may affect the region again by late week. High pressure continuing to building in with mostly clear skies overnight and winds decreasing tremendously ensuring there will be excellent radiational cooling overnight. Temperatures tonight will drop in to the upper 20s for central NC with cooler spots dropping into the mid 20s. With high pressure over head Wednesday will have mostly sunny skies with high temperatures in the low 50s. With the clear skies, light winds, and very dry airmass still in place, overnight lows are expected to fall back down into the upper 20s with some areas in the low 30s.
445 PM CST Tue Dec 1 2020 Tranquil weather will continue to prevail across the region with a ridge of high pressure anchored over the area through Wednesday and just some high cirrus at times. Wednesday will be several degrees warmer than today as 925 mb temps climb to 0-3C ahead of a weak boundary with highs climbing into the mid 30s to mid 40s.
Increasing SFC winds and greater cloud cover are forecast to develop overnight into WED morning, with increasing areas of rain associated with an approaching upper trof and SFC front. Most guidance keeps the center of the low, and its warm sector, off the coast which should keep instability across the region negligible even with some decent directional shear in place.
532 PM CST Tue Dec 1 2020 Currently, a weak upper-level ridge is moving into the Middle Mississippi Valley, and at the surface, an area of high pressure has kept our weather clear and quiet.
An upper level trough is digging over the Rockies while a strong ridge of high pressure builds into the PacNW. Upper level ridging will dominate our weather for tomorrow bringing quiet weather along with weaker winds.
Issued by National Weather Service Riverton WY 259 PM MST Tue Dec 1 2020 Cold core trough remains across the forecast area at mid-afternoon Tuesday.
A few clouds continue to overspread the area as the next trough dives into the central and southern Rockies before lifting into the southern and central Plains late tomorrow. Highs for the rest of the afternoon top out in the low to mid 50s across the area with a southeasterly breeze helping to advect slightly warmer air into the region. Lows tonight will be warmer by about 10 degrees compared to last night as clouds limit radiational cooling and the atmosphere remains slightly mixed in the lowest levels. Tomorrow will be marked by thickening cloud cover as the upper low over the TX panhandle region deepens and a vort max lifts into the southern Plains and into Oklahoma.
241 PM MST Tue Dec 1 2020 Upper level trof moving across south central Colorado this afternoon with the majority/heaviest showers shifting into into Southern Colorado.
Most guidance keeps the center of the low, and its warm sector, off the coast which should keep instability across the region negligible even with some decent directional shear in place.
935 PM EST Tue Dec 1 2020 Cold high pressure will build into central NC through mid-week. Another low pressure system may affect the region again by late week. High pressure will continue to build in with mostly clear skies overnight and winds decreasing ensuring there will be excellent radiational cooling overnight. Temperatures tonight will drop in to the upper 20s for central NC with cooler spots dropping into the mid 20s. With high pressure over head Wednesday will have mostly sunny skies with high temperatures in the low 50s. With the clear skies, light winds, and very dry airmass still in place, overnight lows are expected to fall back down into the upper 20s with some areas in the low 30s.
High pressure over the Midwest will slide south of the region Wed/Thur providing mostly clear skies but still a moderately brisk WNW wind as low level gradient remains tight.
Building upper ridge along with SFC/LL high pressure to continue well into Wed. Temps will range only to the lower and mid 20s elsewhere. High pressure will lead to VFR conditions for the next 24 hours with clear skies and lights winds that will veer from west to east during the afternoon hours.
High level clouds out ahead of the main upper low are currently moving across far eastern Oklahoma and western Arkansas at this time. These clouds are allowing for temperatures to be a little warmer than initially forecast at this time across E OK and NW AR. As a result, opted to increase low temperatures for tomorrow morning given temperatures trending a little warmer than forecast.
Both models bring a ridge of high pressure to our west before breaking down as a closed low forms off the Cali coast, remains stationary, and gets absorbed in the next long-wave trough over the weekend.
724 PM EST Tue Dec 1 2020 Canadian high pressure has settled over west central and southwest Florida with clear skies, light winds, and seasonably cold conditions. The area of high pressure will move over the southeast U. Slightly warmer on Wednesday but still on the cool side with temperatures generally in the 60s.
545 PM CST Tue Dec 1 2020 VFR flying conditions with southerly winds of 7 to 12 KTs this evening will give way to MVFR CIGs at KAUS and SCT-BKN MVFR CIGs at KSAT/KSSF overnight into Wednesday morning as moisture increases ahead of a cold front. The low level flow has switched around to the south and southeast today bringing warmer, moister air back to South Central Texas. Southerly to southeasterly winds will continue tonight and low temperatures on Wednesday will be 15-20 degrees warmer than Tuesday. A cold front that is currently in the Panhandle will move southward tonight and reach our northern border by around sunrise Wednesday. Behind the front, winds will become northwesterly and bring another shot of drier, cooler air.
High pressure will build into the area today. A reinforcing cold front will cross the state midweek. High pressure will settle in again across the region for the remainder of the week.
VFR CIGS will be on the increase from west to east courtesy of an approaching upper level low pressure system. /29/ Tonight and Tomorrow: As a deep low pressure system progresses over the northeastern U. Any high clouds moving into the region could limit full radiational cooling potential, but the usual cold spots in central and eastern parts of Mississippi should still drop to the low 20s. Dry air in the lower levels will be difficult to overcome, so precip intensity should be light.
Diegan Chattanooga Airport, TN 24 50 28 53 41 / 0 0 0 10 40 Knoxville McGhee Tyson Airport, TN 22 47 26 53 38 / 0 0 0 0 30 Oak Ridge, TN 22 47 27 52 37 / 0 0 0 0 40 Tri Cities Airport, TN 18 43 23 54 34 / 0 0 0 0 20.
Expect cold conditions and widespread frost again tonight as high pressure remains in control. Lows tonight will range from the lower 20 to lower 30s. /27/ Prior discussion below: Tonight and Tomorrow: As a deep low pressure system progresses over the northeastern U. Any high clouds moving into the region could limit full radiational cooling potential, but the usual cold spots in central and eastern parts of Mississippi should still drop to the low 20s. Dry air in the lower levels will be difficult to overcome, so precip intensity should be light.
Wednesday will still be cooler, around normal, for temperatures with highs in the upper 30s. Quiet weather will continue as a Rex Block will remain across the country providing ridging aloft across our forecast area.
640 PM EST Tue Dec 1 2020 Cold high pressure will build into central NC through mid-week. Another low pressure system may affect the region again by late week. High pressure continuing to building in with mostly clear skies overnight and winds decreasing tremendously ensuring there will be excellent radiational cooling overnight. Temperatures tonight will drop in to the upper 20s for central NC with cooler spots dropping into the mid 20s. With high pressure over head Wednesday will have mostly sunny skies with high temperatures in the low 50s. With the clear skies, light winds, and very dry airmass still in place, overnight lows are expected to fall back down into the upper 20s with some areas in the low 30s.
High pressure centered over southern Louisiana/Mississippi today arcs up the Mississippi river valley and the western Great Lakes all they way up into Canada. Clear skies and calm winds will be the rule tonight, which will allow for another cold night with lows dropping into the lower to mid 20s. An upper level closed low over the TX/OK panhandles Wednesday morning, will move very slowly eastward through the end of the week. At the surface, a low pressure system will develop over central Oklahoma/Red River Valley region and slowly pivot northeast toward our region. Low level temperatures will rise ahead of this low on Wednesday, which should help boost highs into the upper 40s to around 50 degrees.
Building upper ridge along with SFC/LL high pressure to continue well into Wed. Temps will range only to the lower and mid 20s elsewhere.
Low pressure will track southwest into eastern Utah tomorrow afternoon, resulting in areas of gusty winds.
1045 PM CST Tue Dec 1 2020 Currently, a weak upper-level ridge is moving into the Middle Mississippi Valley, and at the surface, an area of high pressure has kept our weather clear and quiet.
Today will be cooler in response to a weak cold front.
930 PM CST Tue Dec 1 2020 Tranquil weather will continue to prevail across the region with a ridge of high pressure anchored over the area through Wednesday and just some high cirrus at times. Wednesday will be several degrees warmer than today as 925 mb temps climb to 0-3C ahead of a weak boundary with highs climbing into the mid 30s to mid 40s.
LRD-COT should remain VFR through the period with N-NW winds strengthening behind the approaching cold front after 18Z.
Temperatures range from the upper teens to the lower 20s.
204 AM CST Wed Dec 2 2020 A ridge of high pressure was situated over the Upper Midwest which has led to mostly clear skies, light winds, and cold temps tonight. Tranquil weather expected today with highs in the low to mid 40s, light winds, and some passing high cirrus clouds. It won't be quite as cold tonight with lows in the low to mid 20s.
247 AM EST Wed Dec 2 2020 Latest surface analysis shows a 1025mb high pressure overspread across much of the lower OH Valley and south into the Gulf States while satellite shows clear skies across southern Indiana and central KY.
Chattanooga Airport, TN 24 50 28 53 41 / 0 0 0 10 40 Knoxville McGhee Tyson Airport, TN 22 47 26 53 38 / 0 0 0 0 30 Oak Ridge, TN 22 47 27 52 37 / 0 0 0 0 40 Tri Cities Airport, TN 18 43 23 54 34 / 0 0 0 0 20.