Aikyam-Lab/Synoptic-Bench huggingface dataset:
Early this afternoon, temperatures ranged from the upper 30s in north central Illinois, to the low 40s across southern Iowa. At the surface, high pressure was centered east of the area and winds were out of the south/southeast. Tonight, the high clouds should keep the area warmer especially given WAA into our area. Have changed lows little from the overnight, but did pull them down a couple degrees as we seem to be on the high end of guidance. This will carve out a deep long-wave trough in the eastern United States. This will send a strong cold front sweeping through DVN forecast area Sunday afternoon and evening.
Temperatures on Saturday will be similar to today, but it should feel a bit warmer with the lighter winds. The main forecast concern in the upcoming week will be the strong cold front expected to drop through the area on Sunday.
Warmer today with high temperatures in the mid to upper 70s forecast. Low level flow and moisture increase further tonight, leading to the development of widespread stratus along with and warmer overnight lows, in the upper 50s to low 60s. A trough axis will be digging south through the Southern Plains Sunday, which will send a cold front into the region Sunday afternoon and evening.
These winds will gradually decrease this afternoon as the trough axis moves to our east. For Saturday, guidance has trended slightly warmer for temperatures as we will probably see a good amount of sunshine before additional mid and high clouds return in the late afternoon and evening. The aforementioned front will push through the area Sunday morning, making for a cooler and windier day on Sunday.
A weak mid level trough currently over Washington/Oregon, will track eastward overnight and across the CWA during the morning hours on Saturday. The area will see increasing cloud cover this evening and through the overnight, which may keep low temperatures warmer, especially in central SD, where a few models suggest lows in the mid to upper 30s. Depending on model used, the mid level trough appears rather moisture starved, with maybe very light pcpn, or none at all occurring. A strong cold front will approach the CWA late Saturday night with increasing northwesterly winds expected. Arctic high pressure will build in potentially setting the stage for colder than forecast Sunday night lows as winds diminish, especially across the east.
Behind the cold front on Sunday night, strong northwest winds and very cold wind chill temperatures are expected. Visible satellite shows an extensive area of mid-high clouds to our west in association with a rapidly moving short wave trough, which will move over central Illinois from this evening through the overnight hours. Between the increasing southerly winds and the cloud cover, minimum temperatures Saturday morning will be well above those observed this morning, from near to a few degrees above freezing. Next, a robust wave will usher in a cold frontal passage Sunday afternoon/evening, with strong northwest winds and dropping temperatures in the post-frontal air.
Will see warmer high temperatures on Saturday, around 5 degrees above normal. A secondary reinforcing cold front will drop southeastward through our forecast area Sunday afternoon and evening as an upper level trough deepens over the Great Lakes region.
Afternoon highs in the upper Yampa reach the lower 40's so either a wet snow or rain/snow mix is expected therefore a dusting to a couple of inches are possible along the highway 40 corridor. The central and northern mountains may pick up a quick 3-5 inches with the higher totals in the Park Range. However, where cloud cover takes hold, expect highs as much as 10 degrees cooler than today. Dry air certainly takes over the scene on Sunday in the lingering northwest flow and the cooler temperatures reach the Four Corners region, so highs will run 5-10 degrees cooler than today.
1012 PM CST Fri Nov 19 2021 Temperatures are mainly in the low to upper 30s across the Mid- South, with Memphis Airport sitting at a balmy 42 degrees. The rest of the night should remain quiet and cool as weak high pressure remains in place. Clear skies and light winds tonight will keep lows right around freezing across most of the area. Southerly flow building in tomorrow will increase moisture and encourage showers to develop ahead of a fast-moving cold front on Sunday.
The clouds and breezy winds will help to keep temps on the warmer side with lows only falling into the lower 30s. With the higher precipitable water values and better lift, there could be a few rain showers across the southeast late Saturday night. With temperatures above freezing, not expecting any freezing rain late Saturday night.
1012 PM EST Fri Nov 19 2021 High pressure offers dry conditions through the start of the weekend. Increasing chances for rain will occur late Saturday night into Sunday ahead of a cold front. Expect temperatures to continue to fall into the lower 20s to upper 20s. High pressure gradually moves towards the Atlantic coast on Saturday, limiting its influence across the Ohio Valley. However, a large column of dry air in the lower levels will help limit any of this rain from reaching the surface. Models have begun to slow the progression of rainfall Saturday night ahead of a cold frontal boundary. Sharpening mid level trof digging east-southeast into the Great Lakes with front pushing across the area Sunday night. Expect Sunday's temperatures to be closer to normal with highs ranging from the upper 40s northwest to the lower 50s south.
The warm advection on the van of that system will be compromised with trough encroachment this afternoon; hence, temperature is only expected to moderate to near the seasonal averages. Low level southerly flow via eastward shifting high pressure and a mid level cloud blanket should keep Saturday night temperature about 10 degrees above this mornings readings.
1234 AM EST Sat Nov 20 2021 Chilly high pressure will remain over the region through this weekend.
/issued 1012 PM CST Fri Nov 19 2021/ Temperatures are mainly in the low to upper 30s across the Mid- South, with Memphis Airport sitting at a balmy 42 degrees. The rest of the night should remain quiet and cool as weak high pressure remains in place. Clear skies and light winds tonight will keep lows right around freezing across most of the area. Southerly flow building in tomorrow will increase moisture and encourage showers to develop ahead of a fast-moving cold front on Sunday.
810 PM MST Fri Nov 19 2021 Winds will continue gusty over the higher terrain overnight and in and near the foothills. Expect prolonged period of light snow tonight into Saturday in the mountains, with the ridgetops picking up a few inches and slick roads on the higher passes. Min temperatures a few degrees warmer than last night in downslope flow and increased cloud coverage. For Saturday a weak cold front will shift surface winds to north to northwest, and combination of weak cold air advection at the surface and increased cloud cover will cool Saturday vs today. Weak upper level trof and associated jet streak will be moving south and southeastward across Colorado Saturday night.
High pressure to our east will shift the winds to the southeast today, and temperatures will be warmer than yesterday. A cold front approaches our region on Sunday, so rain chances go up during the afternoon in east Texas.
Tranquil conditions are continuing across the Tennessee valley this evening, with high pressure at the surface centered just north of the area. Southerly flow returns quickly on Saturday as the low-level ridge shifts off to the east. Cloud cover will increase late Saturday night into Sunday morning ahead of an approaching upper level trough and associated cold front. Overnight lows will be a good bit warmer with this continued southerly flow and increasing cloud cover. The main story in the extended will be the anomalously cold airmass that will build into the region behind the departing cold front.
This feature was producing some light returns on radar from eastern Iowa into southeast Wisconsin, but dry air in the low levels was preventing anything from reaching the ground. A rather weak cold front stretches from western Ontario down through northwest Minnesota. Hi-res models want to develop a smattering of light precip near the Iowa/Minnesota border heading into this afternoon/evening, but forecast soundings show plenty of dry air holding on in the low levels. A warmer day on tap with highs in the 40s and considerably less wind than in recent days. Surface ridging briefly settles over the area tonight, allowing for partial clearing north of I-90.
An approaching cold front will arrive late in the day on Saturday but not before seasonably mild temperatures are observed with most areas seeing highs in the upper 50s/around 60. a stable post-frontal regime is anticipated across the area on Sunday as high pressure settles across the region.
1049 PM CST Fri Nov 19 2021 High pressure will move off to the east tonight, which will set the stage for milder south winds on Saturday. The forecast will follow the consensus guidance, with lows around freezing tonight.
As the day progresses, a weak inverted trough type feature will sag through and shift winds to a north/northeast direction from late morning through the afternoon. Temperatures today will be a few degrees warmer than yesterday, even with the north wind. Tonight, a secondary surge of northwest winds and cooler air will push through. Temperatures Sunday will be a solid notch cooler than today, but actually settle to about the seasonal normal for November 21st.
Expect afternoon highs to top out in the low 50s as warm air moves in across the region. Breezy winds overnight will help to keep our lows a bit warmer than this morning. As we head into Sunday, upper level troughing will start to slide toward area dragging a cold front with it. Most of the area will still reach highs around 50 on Sunday, but cooler weather will return for the start of the week.
Isolated showers associated with an upper trough will continue in southwest Idaho this evening and end overnight. A cold front will continue to cross the region this evening, generating showers mainly over higher terrain. An upper ridge will then build into the western US, allowing for drying and gradual warming.
Zonal flow will continue tonight through tomorrow, with a weak cold front nudging south Saturday evening into Sunday. Weber High temperatures on Sunday are expected to be mainly in the 50's behind a cold front.
1108 PM CST Fri Nov 19 2021 VFR conditions will dominate all stations due to high pressure. /issued 517 PM CST Fri Nov 19 2021/ VFR conditions will dominate all station due to high pressure.
A cold front is still expected to push into the FA ahead of the upper trough before sunrise tomorrow morning with breezy northerly winds expected behind the front.
1207 AM EST Sat Nov 20 2021 High pressure will prevail through this weekend.
Isolated rain showers this morning, mostly dry weather through Sunday with high pressure building into the area.
Gusty southerly and southwesterly flow at the surface will bring a much warmer air mass to the area, with afternoon highs soaring well into the 70s for most areas. A few areas closest to the frontal boundary north of I-20 may see readings reach the lower 80s. Cold front reaches the Big Country by around sunrise, with winds shifting to the north and a little cooler air mass.
- Temperatures will fluctuate day to day as a series of weak troughs and ridges move through. Today and Tomorrow: A cold front currently located across northern South Dakota will move through the forecast area this afternoon. Despite the frontal passage, high temperatures will be slightly warmer today due to low level warm air advection ahead of the front. A stronger cold front is forecast to move through the area on Sunday.
High pressure moves across South Dakota today, and currently northwest winds will shift around to the southwest by mid-afternoon. Post frontal afternoon highs will range from the upper teens in Langdon to around freezing in Gwinner/Wahpeton. A progressive pattern will remain locked in place through the longer ante periods, with variability tied to the track, timing, and evolution of individual troughs as they sweep across the Northern US.
/issued 324 AM CST Sat Nov 20 2021/ Temperatures are in the low to mid 30s across the Midsouth. Over the next 36 hours or so a ridge will strengthen over the western US and a positively tilted trough will track across the northern Plains into the Midwest. An associated cold front will approach the Midsouth early Sunday.
352 AM CST Sat Nov 20 2021 Today and Tomorrow: Ideal radiational cooling conditions have seen temperatures plummet quickly overnight, and most area residents should be waking up to temperatures in the lower and mid-30s. A few of the typically cooler spots in northeastern and eastern Mississippi have even dropped into the upper 20s. With the increase in humidity and low-level flow, overnight temperatures should be warmer and fog development is possible tonight into early Sunday morning. /NF/ Sunday through the week: High pressure at the surface will be centered across the Atlantic Ocean, but will stretch southwest into our region Sunday morning, with zonal flow aloft.
A strong 500 hPa trough and surface cold front will drop southward from Canada Sunday morning. Cold advection behind the front will also limit Sunday's temperature rise with afternoon highs ranging from near freezing along the Hwy 14 corridor to the lower 40s across parts of far southeast SD into northwest IA.
Meanwhile, our corner of the country will in turn see a rather dirty ridge build in from the west coast.
Skies will quickly clear out with more high pressure arriving. Our next cold front will be sweeping over the region during Sunday. Looks a little warmer than average today with lower 70s and then overnight with light S winds, the air temps will range all through the 50s across the four state area.
Temperatures this morning as of 07z are fluctuating quite rapidly between the upper 20s/lower 30s, where SFC winds are calm, all the way up into the lower 40s, where SFC winds are around 5 knots. Locations that are seeing the wind blow this morning, the nocturnal stable layer is mixing out bringing the lower 40 degree temperatures at the top of the inversion down to the SFC. By daybreak, the winds should relax and most places will wake up to temperatures around freezing. As for the rest of the day, high pressure to our east will continue to dominate the weather across the Tennessee Valley. As a result, not nearly as cold with lows Sunday morning only in the lower 40s. South of this trough, a cold front will stretch southward from the Midwest towards AR/OK.
324 AM CST Sat Nov 20 2021 Temperatures are in the low to mid 30s across the Midsouth. Over the next 36 hours or so a ridge will strengthen over the western US and a positively tilted trough will track across the northern Plains into the Midwest. An associated cold front will approach the Midsouth early Sunday.
and Sunday A weak cold front will move across the region today, but the air behind it is of Pacific origin and not very cold. A stronger cold front will move across the area Sunday, with some snow showers in the north and sprinkles or snow flurries to the south.
Added patchy freezing fog to much of northern and portions of east-central NV for this morning as dew point depressions are expected to lower down to 1-3 degrees. High pressure will build in from the west this afternoon and through the remainder of the weekend, with dry conditions expected from late this morning through Sunday evening.
Portions of northwest Montana may see pockets of light freezing drizzle, but isn't expected to be widespread.
By late afternoon a fast moving trough brings a dry cold front through the area. Main effect will be some breezy conditions (though not enough for a Lake Wind Advisory), and a ten degree temperature drop for the highs on Sunday.
336 AM CST Sat Nov 20 2021 The main focus in the short term is the potential for rain tonight into Sunday with the approach and passage of a strong cold front. This paired with the approach and passage of our next cold front will yield the potential for mainly light rain late tonight and Sunday.
538 AM CST Sat Nov 20 2021 Large scale ascent with a well positioned jet streak sliding by to our south and some frontogenetical forcing will move across the High Plains today into tonight. A dry cold front will then move thorugh Nebraska on Sunday but it looks like a glancing blow with most of the cold air be shunted off to the east.
457 AM CST Sat Nov 20 2021 (Today and tonight) Variable high level cloud cover expected today with an overall increase late in the day and tonight ahead of positive tilted longwave trough and associated eastern Pacific connection. Associated and ahead of this trough, relatively weak cold front will progress slowly across the region late today and tonight. While is should be noticeably warmer today than the temperatures seen yesterday, mentioned high level cloud cover and weaker/developing northerly winds should keep highs in the 60s across the northern half of Oklahoma, while southern Oklahoma and northern Texas could see highs well up in the 70s.
Weak cold front is dropping through far northwest South/northern Wyoming. bringing a second cold front across the area.
Focus will then turn to the potent cold front moving through late tonight into early Sunday morning. High pressure will settle in over the region Sunday night, with fairly cold lows expected.
Brief very light rain is expected with a cold frontal passage late tonight and Sunday morning over far southern MO.
A cold front will trigger rain showers late tonight into Sunday morning, primarily along and east of the I-55 corridor. 08z/2am surface analysis shows sprawling ridge of high pressure extending from Quebec southward to the Gulf Coast, while the next frontal system of interest begins to get organized further west across the High Plains. Given sunshine and increasing southerly winds, afternoon high temperatures will climb into the lower to middle 50s across the board. As moisture return continues and a cold front slowly approaches from the west, showers will develop tonight. Showers will be ongoing mainly east of I-55 Sunday morning, but will quickly shift E/NE into Indiana by early afternoon as the cold front progresses through the area.
338 AM PST Sat Nov 20 2021 Widespread fog and freezing fog is expected to persist tonight into the weekend. Light drizzle or freezing drizzle is also expected to fall out of the low clouds Saturday morning. An area of 500mb vorticity is expected to transverse across the region this morning, potentially triggering some light drizzle/freezing drizzle primarily in the northern halves of eastern Washington and North Idaho between 12Z and 21Z. Colder temperatures are anticipated making it likely that we will see more freezing fog than last night.
Widespread 40s are expected this afternoon with a weak cold front stalling out over the area.
345 AM CST Sat Nov 20 2021 Large scale ascent with a well positioned jet streak sliding by to our south and some frontogenetical forcing will move across the High Plains today into tonight. A dry cold front will then move thorugh Nebraska on Sunday but it looks like a glancing blow with most of the cold air be shunted off to the east.
410 AM MST Sat Nov 20 2021 The axis of the trough is passing through the region right now, with light snow shower activity drifting through at higher elevations. There is a very weak frontal boundary drifting across northern WY, but as the trough passes, this should pretty much wash out by noon. Behind the trough, flow becomes more northwesterly. By Sunday, H5 ridging will be building across the Intermountain West, decreasing the northwest flow. A ridge begins to build Sunday, which will keep temps near normal to just above normal through the early part of the week.
203 AM PST Sat Nov 20 2021 High pressure will result in seasonably cool temperatures and valley inversions this weekend with a period of gusty east winds over the Sierra ridges tonight into early Sunday morning.
Combination is generating scattered shower activity with most observations indicating rain for the lower elevations. Temperatures are starting off warm so upper 40s will be the highs in most areas. Sunday upper level high pressure over the Pacific Northwest starts building towards the area but strong flow over the top of the approaching ridge supports the formation of leeside troughing. Stronger surface pressures over eastern Idaho/western Wyoming allow intensification of gap flow pressure gradients so do expect winds to approach advisory levels Sunday evening.
The region will experience increasing cloud cover throughout the day today in lieu of an advancing cold front.
Widespread 40s expected this afternoon with a weak cold front stalling out over the area.
The TN Valley will be under the influence of the high pressure anchored in the Mid Atlantic once again today. As a result, not nearly as cold with lows Sunday morning only in the lower 40s. South of this trough, a cold front will stretch southward from the Midwest towards AR/OK.
Our next cold front will be sweeping over the region during Sunday. Looks a little warmer than average today with lower 70s and then overnight with light S winds, the air temps will range all through the 50s across the four state area.
A low pressure system will produce cloudy and cool conditions for the middle of the week, otherwise temperatures will continue to run right around normal. Model runs are similar, as they move the weak trough through the region today while low pressure continues to develop well offshore.
Lows will range from the lower/mid 60s inland. Rain chances are expected to begin increasing by tomorrow afternoon (from the north) with the approach/passage of this next cold front. Cooler/drier air is set to filter into the region tomorrow night be- hind this line and any precipitation that forms.
It was another chilly night across Middle Tennessee, although a few degrees above last night thanks to some high clouds and slight return flow as a high pressure center moves off to the east. Today will be 5 to 10 degrees warmer than yesterday as south winds increase. Clouds will increase as a cold front takes shape over the Midwest. The cold front will sweep through the area Sunday evening, pushing the showers out and letting the cold air in.
Nice late Fall weather is expected for the weekend as high pressure builds aloft and skies clear.
A weak cold front will pass through the area overnight into Sunday, bringing slightly cooler temperatures and gusty north winds to the area.
The amount of clearing will have an impact on temperatures, but with light to calm winds and at least some clear pockets tonight, leaned on the cooler MOS guidance for overnight lows. Temperatures behind this front will be much cooler, which will become more noticeable by Sunday evening and overnight. Sunday Night Through Saturday After a cold front moves through Wisconsin on Sunday, Canadian air will push in Sunday and temperatures will drop into the teens to upper single digits Sunday night, with wind chills down to around zero in northern and central WI.
/issued 1043 AM CST Sat Nov 20 2021/ Current forecast is on track for highs today that generally will be in the lower 70s under plenty of sunshine. High pressure to our east will shift the winds to the southeast today, and temperatures will be warmer than yesterday. A cold front approaches our region on Sunday, so rain chances go up during the afternoon in east Texas.
Otherwise, FEW to SCT VFR ceilings are expected trough this evening. Lows will range from the lower/mid 60s inland. Rain chances are expected to begin increasing by tomorrow afternoon (from the north) with the approach/passage of this next cold front. Cooler/drier air is set to filter into the region tomorrow night be- hind this line and any precipitation that forms.