Aikyam-Lab/Synoptic-Bench huggingface dataset:
224 PM PST Sun Nov 20 2022 Cold overnight lows through Monday with near-freezing temperatures possible for rural Valley areas. Dry conditions and seasonal daytime temperatures prevail across interior NorCal this afternoon under upper level ridging. Afternoon highs will climb into the low to mid 60s across the Valley, with 40s to low 60s expected over the mountains.
432 PM MST Sun Nov 20 2022 Very close to a persistence forecast for tonight and Monday, with skies remaining clear and just some marginal warming aloft as the ridge to our west flattens and leaves us under increasingly zonal flow.
508 PM CST Sun Nov 20 2022 (Tonight) High pressure in place will provide a mostly clear sky and tranquil winds overnight. This will provide a good set up for radiational cooling and temps will fall into the lower 20s.
204 PM MST Sun Nov 20 2022 Very close to a persistence forecast for tonight and Monday, with skies remaining clear and just some marginal warming aloft as the ridge to our west flattens and leaves us under increasingly zonal flow.
Otherwise, expect for high pressure to build back over the Mid-South starting tomorrow, causing an increase in temperatures for the first half of the week.
229 PM PST Sun Nov 20 2022 Cold mornings continue across the San Joaquin Valley with freezing temperatures possible in rural areas Monday morning.
The overnight hours should be quiet with lows a bit warmer than the past couple of nights, except along the base of the foothills, as the short term discussion mentioned earlier. Very close to a persistence forecast for tonight and Monday, with skies remaining clear and just some marginal warming aloft as the ridge to our west flattens and leaves us under increasingly zonal flow.
Building high pressure mid-to-late week will allow temperatures to warm above seasonal averages. A cold start to the day this morning with sub-freezing temperatures observed in the Las Vegas Valley at Henderson Executive Airport and Nellis Air Force Base. Another chilly night expected tonight before warmer days return.
Temperatures will then slowly begin to increase after midnight into the 60s across the interior and the low to mid 70s along the coast and near Lake Okeechobee. The minimum temperature overnight also had to be adjusted downward based on observations coming in cooler than what was originally forecast.
Cold mornings continue across the San Joaquin Valley with freezing temperatures possible in rural areas Monday morning.
High pressure and cold conditions will continue across the area tonight, with light northeast winds. Lows tonight will range from the mid 20s in the north to the low 30s in the south.
With the surface pressure gradient remaining favorable and a developing lee trough Monday, the breezy to windy conditions will continue in the mountains and the central WY wind corridor tonight through Monday night. The extended will be fairly quiet and likely warmer than normal.
High pressure will remain over the region one more day resulting in a pretty persistent pattern with inversions and cold temperatures. Patchy morning fog will occur in the lower valleys across Northwest Montana and especially the Missoula and Bitterroot valleys for a few hours in the early morning hours.
High pressure will remain in place across the Great Basin region, resulting in persistent inversion conditions across western valley areas.
A weak front shifting through the forecast area tonight will bring slightly cooler temperatures tomorrow, but still near normal from 42 to 51.
The latter will also be dry but the overall impact is to keep the northern Rockies ridge somewhat suppressed, and our warming trend gradual.
In the wake of a back door cold front that once again pushed H85 temps down below 0C in the northeast, there will be little mixing or waa today.
300 AM EST Mon Nov 21 2022 Dry and gradually warmer weather is expected through Thanksgiving as high pressure moves across the region. Rain returns to end the week with crossing low pressure. High pressure will maintain dry weather and mostly sunny skies today as it builds across the Ohio Valley and Mid Atlantic region. A weakening cold front tracing ewd across Ontario should spread some stratocu clouds across areas north of I 80 tonight. This front is progged to dissipate overnight as high pressure builds back nwd across the Upper Ohio Valley region.
1057 PM CST Sun Nov 20 2022 (The rest of tonight) Forecast is on track this evening with notably warmer 24hr temp trends across the region supporting a more mild night ahead. (Monday through Sunday) With the exception of southeast Oklahoma on Monday - due to the aforementioned cloud cover - the early part of the work week will be characterized by warmer temperatures and increasing southerly winds and low level moisture.
(The rest of tonight) Forecast is on track this evening with notably warmer 24hr temp trends across the region supporting a more mild night ahead. (Monday through Sunday) With the exception of southeast Oklahoma on Monday - due to the aforementioned cloud cover - the early part of the work week will be characterized by warmer temperatures and increasing southerly winds and low level moisture.
852 PM MST Sun Nov 20 2022 Northwesterly flow aloft continues this afternoon as the forecast area remains on the eastern edge of a broad upper ridge over the western CONUS. At the surface, a weak trough/front rotating around a low pressure center over Hudson Bay is currently crossing the forecast area. Zonal to northwesterly flow aloft will continue through the first half of the week, producing dry weather and warmer than average temperatures. Due to a couple of weak impulses crossing the region, temperatures on Monday will be a little cooler than today.
237 AM EST Mon Nov 21 2022 * Sunny and Warmer Today * Clear and not as Cold Tonight Surface analysis early this morning shows Indiana caught between an area of strong high pressure stretching from southern OH to Arkansas and deep low pressure found over northern Ontario. Thus a mostly sunny day will be expected with warmer temperatures than yesterday. Weak warm air advection will continue to be in place, thus will trend lows warmer than persistence, in the upper 20s.
Despite lift and saturation aloft as the wave to our west drifts closer, forecast soundings show a struggle to get any precipitation through dry air in the lower levels heading into tomorrow. Temps tonight should again fall into the mid 20s to the north and low 30s to the south as high pressure keeps winds calm ans skies mostly clear. High pressure and cold conditions will continue across the area tonight, with light northeast winds. Lows tonight will range from the mid 20s in the north to the low 30s in the south.
Warm front has pushed NE into Ontario early this morning. Upstream moisture-starved cold front will slide thru our CWA today. Weak WAA ahead of the approaching cold front will boost our high temps today into the mid to upper 30s across our entire CWA. Weak CAA behind the cold front will drop low temps tonight into the teens to lower 20s. A center of high pressure over the Ohio Valley will move off to the east as a warm front associated with a low pressure system over southwestern Canada begins to move into northern Michigan.
1002 PM CST Sun Nov 20 2022 (Issued 1002 PM CST Sun Nov 20 2022) Gusty southwest winds continue ahead of an approaching cold front tonight. Patterson (Issued 356 PM CST Sun Nov 20 2022) Tonight through Monday night: Low pressure tracking across Ontario tonight will drag a cold front through WI Monday morning. Winds will be gusty out of the southwest tonight, then become westerly Monday morning and gradually diminish through the day as they become more northwesterly due to high pressure moving in. Highs Monday will be in the mid to upper 30s, despite being behind a cold front.
153 AM MST Mon Nov 21 2022 Northwesterly upper level flow is prominent across the High Plains today along with some split surface flow allowing for clear skies, lighter winds and warmer temperatures with all locales expected to make it into the low 50s during the afternoon. A dry air mass remains in place as dew points remain in the upper single digits to low teens across the area; this will allow RH values to fall into the low to mid teens to perhaps as low as single digits. Into Monday, the upper level pattern is relatively the same with NW upper level flow again dominating the pattern, this will lead to a similar weather day as today with high temperatures in the low to mid 50s.
Inversion is now at full strength with high pressure aloft and warmer air directly above the cold valleys. The ridge will flatten Monday and a weak Pacific trough will also come in, weakening but not removing the inversion.
1258 AM EST Mon Nov 21 2022 High pressure will result in dry weather into Thanksgiving with a warming trend.
The EC has been more progressive with this system and generally farther east with the upper low/trough. While prospects for winter weather at some point during the holiday weekend can't be completely ruled out based on where the upper low wraps up, travel impacts from the weather still look unlikely at this point.
Mean layer ridging across the western North Atlantic, the Western Caribbean, and Central America is butted up against a lengthy hemispheric-scale subtropical jet. The most recent SFC analysis places a stationary boundary across the Keys and a cold front into SW FL. We appear to be right on the edge of the cold front.
1021 PM CST Sun Nov 20 2022 (Tonight) A weak area of high pressure continues to move slowly to the ESE tonight. The exception to this is just west and near a weak area of low pressure over north central/northwestern GA. Expect dewpoints to rise over northern Alabama and southern middle Tennessee between now and daybreak on Monday as a result, mainly into the lower 20s.
A large area of high pressure covers much of the eastern half of the U. High pressure will continue to control the weather across the region today and tonight with dry conditions expected. As a result, temperatures will be a little warmer today as highs reach the upper 40s to lower 50s.
803 PM MST Sun Nov 20 2022 Breezy and gradually warmer conditions are expected to be the theme of the week across North-Central and Southwestern Montana.
As boundary layer and mid-level ridging build across the region today, 850mb temperatures will be on the rise to around 4 to 7 deg C. This will result in warmer afternoon max temperatures by about 10 deg F that what was observed on Sunday afternoon. With the cold, dry airmass across the region, temperatures remain cooler than normal again tonight.
The high clouds streaming through seem to be helping to keep temps a little warmer, but the typical cold spots are well cold. Also added in fog and stratus to the Bear Lake region and fog to around Osborne Bridge near Island Park as supported by obs and satellite. A ridge of high pressure will "flatten" (lose some strength/ deamplify) over the nrn Rockies/Great Basin over the next 36 hours or so, but will still remain the dominant wx enforcer during that time with just periods of high clouds drifting across the region and very little wind.
348 AM PST Mon Nov 21 2022 There will be be weaker winds with high clouds into Tuesday and with coastal areas a little cooler.
625 AM EST Mon Nov 21 2022 Southerly flow on the back side of high pressure will result in dry weather into Thanksgiving with a warming trend.
For those of you who aren't fans of the cold, this will be welcomed as WAA will increase temps into the low to mid 50s.
217 AM PST Mon Nov 21 2022 Cold overnight lows through this morning with near-freezing temperatures possible for rural Valley areas. Some rural areas will again fall to the freezing mark. Forecast highs in the low to middle 60s equate to within a degree or two of late November climatology.
Given the mild start and over-performance yesterday, have hedged highs today toward the warmer side of guidance, ranging from around 30 in southwest MN, to the lower 40s through the Missouri River Valley. But speeds generally taper off through the afternoon in response to a weakening gradient ahead of advancing high pressure. This will be most noticeable in higher elevations toward central SD and over the Buffalo Ridge in southwest MN, with valley areas perhaps just seeing temperatures hold steady after midnight instead of continuing to fall through daybreak.
Building high pressure mid-to-late week will allow temperatures to warm above seasonal averages. It stays breezy within the lower CRV, while away from the river valley winds will be light and variable.
High pressure will remain in place across the Great Basin region through Tuesday, resulting in persistent inversion conditions across western valley areas.
441 AM EST Mon Nov 21 2022 Southerly flow on the back side of high pressure will result in dry weather into Thanksgiving with a warming trend.
Readings are in the 20s to the lower 30s across C AL.
502 AM PST Mon Nov 21 2022 Cold overnight lows through this morning with near-freezing temperatures possible for rural Valley areas. Some rural areas will again fall to the freezing mark. Forecast highs in the low to middle 60s equate to within a degree or two of late November climatology.
711 AM EST Mon Nov 21 2022 Dry and gradually warmer weather is expected through Thanksgiving as high pressure moves across the region. Rain returns to end the week with crossing low pressure. High pressure will maintain dry weather and mostly sunny skies today as it builds across the Ohio Valley and Mid Atlantic region.
943 AM EST Mon Nov 21 2022 High pressure will linger over the region through the middle of the week. Low pressure may approach the area by later this week or this weekend. High pressure will become centered just offshore this afternoon, allowing southerly flow to develop.
Expect a Pacific trof to move through Idaho Tuesday night and spread at least a slight chance of snow to all of southeast Idaho overnight. Below normal high temperatures will continue today and Tuesday in most locations with many areas in lower elevations above freezing by Tuesday.
(Today and tonight) The WV imagery is showing a short wave trough now moving into southwest Texas. Warmer today with afternoon highs in the 50s.
As boundary layer and mid-level ridging build across the region today, 850mb temperatures will be on the rise to around 4 to 7 deg C.
An influx of scattered clouds overnight allowed for temperatures across northwest Montana to be generally 10 to 18 degrees warmer than they were at this time yesterday. Breezy south winds have developed in the Camas Prairie and temperatures are expected to rise above freezing there today. Ignatius, the southern Bitterroot Valley, lower elevations of Idaho except for the Salmon area and the higher elevations of southwest Montana. As always with westerly trough passages, the larger valleys will experience much less precipitation due to the downsloping effects. There is a moderate chance (40 to 60 percent probability) that freezing rain could occur in the lower valleys below 3000 feet of both north-central Idaho and northwest Montana.
306 AM MST Mon Nov 21 2022 Dry NW flow aloft will be over the area today with a weak sfc lee trough along the front range. Tuesday will be mostly clear and dry with near normal temperatures, highs mostly 50s across the plains and 20s to 40s in the high country. There will be weak northwesterly to westerly flow aloft and a trough approaching from the Pacific Northwest.
514 AM CST Mon Nov 21 2022 (Today through Tuesday) Quiet morning underway with high pressure remaining well in control of our forecast for the next several days. Luckily, the bitter cold does appear to have left for the time being, with temps rebounding quickly today and highs reaching the low 50s for the first time in about a week. Temps will be even warmer tomorrow, with highs in the mid to upper 50s.
An area of low pressure is expected to develop somewhere in the Mississippi/Ohio Valley mid to late week and could bring parts of our area rain. Low pressure to our north will pull further away from the region today, causing the pressure gradient to relax and winds to ease up this afternoon. On the northwest side of high pressure across the south/Ohio Valley, west-southwest flow will advect less chilly air into Central IL, and if the mixed layer deepens sufficiently the southern part of the CWA could see temperatures warm to 50 degrees or better this afternoon.
624 AM CST Mon Nov 21 2022 Low stratus with freezing fog continues across Southeast New Mexico, the Upper Trans Pecos, and much of the Permian Basin. The Freezing Fog Advisory has been expanded to include Andrews, Martin, Ector, Midland,and Ward counties. Some areas of fog/freezing fog have already developed along the upper Pecos Valley and Lea County but as the morning progresses, the low stratus and FG/FZFG should become one in the same. Another round of fog may develop late tonight, this time across the lower Trans Pecos and southern Permian Basin where the better moisture will be found. The warming trend continues into Tuesday with high temperatures peaking in the low 60s for most.
544 AM CST Mon Nov 21 2022 (Today and tonight) The WV imagery is showing a short wave trough now moving into southwest Texas. Warmer today with afternoon highs in the 50s.
The associated cold front will stall across the Tennessee Valley later today, unlikely to drift into north Central Alabama, before washing out. In response, low level winds will increase from the west and southwest today, resulting in a noticeably warmer and more moist airmass returning to the area. Skies will remain clear, as the trough and cold front are moisture starved.
As a cold front slides through the region, west to northwest winds will increase. A wintry mix is possible as the cold front approaches which will quickly shift over to light snow with the cold air advection. It would not be surprising to see a brief period of freezing rain, especially in the east, but impacts should be minor given light QPF and quick transition to snow.
Upper level winds will continue out of the northwest today and an upper level low pressure center in the desert southwest will slowly move east.
CAMs are highlighting a line showers over the Permian Basin by 00Z and another area of showers over the Lower Trans Pecos. Thunderstorms are expected to trek west to east as the low progress through the region exiting the area by tonight. Lows tonight are forecasted to drop down to the low 30s to low 40s due to increased dew points across the area.
This upper level low will move into Texas, bringing lift and a weak return of low level moisture during the last 12 hours of the forecast.
415 AM MST Sun Jan 30 2022 Current surface map places trof across eastern Montana into far western South Dakota. Flat upper level ridge is located across the northern Rockies/Plains. If we could get a break in the high clouds, a few 60s are possible. Upper trof moves in the plains Monday, with initial cold front arriving during the day.
Dry, offshore winds will develop late Monday through midweek across the Bay Area and Central Coast peaks and ridges. Thus, many colder inland valley locations will be in the low to mid 30s during these early morning hours.
Highs look to push north of freezing for many locations Mon/Tue. How far south these chances would extend is the main question for this area, with an associated cold front providing some lift. This suggests a few days under the influence of a trough (cold), and a few days under a ridge (milder). Locally, the concern is how far north its associated deformation region would extend - do we get into snow? MID WEEK WINTER STORM: The Tue system hangs a cold front out to the southwest, stretching from the eastern great lakes into the southern plains.
This will aid in temperatures trending warmer with highs in the upper 50s north of I20 and mid to upper 60s south of I20.
Otherwise, upper-level ridging across the region to maintain VFR conditions through the terminal forecast period ending 31/12Z. /Today through Monday/ Upper-level ridging to prevail across the region today maintaining mostly sunny skies areawide. An upper-level trough to swing east into Texas tonight allowing for gradually increasing unstable southwest flow aloft. Additionally, much warmer temperatures expected with low temperatures ranging from the upper 30s to the mid 40s.
The arctic air mass coupled with clear skies and strong cold air advection could cause the Lower and Middle Keys overnight temperatures to fall near the middle to upper 40s and the Upper Keys to the upper 30s to lower 40s. Due to the low overnight temperatures expected over portions of the Upper Keys, a wind chill advisory remains in effect until 9 am this morning. High pressure will slowly build into the western Atlantic on Monday, ahead of a mid to upper-level low that will be near western and central Texas.
726 AM EST Sun Jan 30 2022 Light snow is expected today as weak low pressure passes. An overall lack of moisture will keep snow totals on the light side, generally a half inch or less, although totals on the ridges may approach an inch with a modest upslope kick.
156 AM PST Sun Jan 30 2022 A weak ridge aloft will keep the weather fair and mild through Monday, but nights will be chilly.
The warmer trend will continue for the short term period. along with continued warmer conditions.
The ridge of high pressure will begin to flatten today allowing for some light precipitation to move into Northwest Montana this afternoon. Then tonight a Pacific cold front will make its way through the region and bring widespread snow to the region. While the valleys will have a wintry mix with even the potential of pockets of freezing rain. After the frontal passage the higher terrain should anticipate gusty westerly winds.
524 AM CST Sun Jan 30 2022 An upper level ridge will continue to push eastward across the Western U. Today will be a little bit cooler behind a weak front that moved through.
the upper pattern will feature upper level high pressure stretching from the Great Basin, east across Colorado, while and upper low passes slowly well to our south. The only impacts from from the upper low may be a few high clouds over the southern mountains this morning into afternoon.
A weak cold front will race through central Illinois early this morning accompanied by little more than a few mid/high clouds. Despite the northwesterly flow, ample sunshine will push afternoon highs into the lower to middle 30s everywhere east of the Illinois River. As upper heights continue to rise and winds once again switch around to the S/SW, warmer conditions will arrive by Monday as highs climb into the 40s.
Temperature wise, we'll be near late January normals in the low to mid 20s. We'll briefly climb towards the higher end of normal to slightly above by Monday with ridging overhead.
A weak upper low will bring a chance for snow flurries or even light snow accumulations along and south of Interstate-40 until around sunrise then mainly in the White Mountains the remainder of the day.
However, cold advection behind the low will allow a lower cloud deck to develop. Upper ridging will build in on Monday, and warm advection will kick in as well.
High pressure was providing mainly clear skies across the eastern 1/2 to 2/3rds of the state early this Sunday, while layered cloud cover was spreading across the west, ahead of a weak upper level disturbance embedded in the NW flow aloft. Scattered flurries are expected throughout the Central Ridge and Valley of the state, mainly to the West of the Susq Mainstem.
640 AM EST Sun Jan 30 2022 High pressure along with relatively dry air will remain in control of the region through the middle of the week along with a warming trend.
519 AM MST Sun Jan 30 2022 Another quiet weather day will prevail over Colorado under a ridge of high pressure.
Today and Monday: A progressive northwesterly mid/upper flow pattern is in place across the central CONUS, with a cutoff low pressure system riding the north side of the subtropical jet entering the Desert Southwest.
257 AM MST Sun Jan 30 2022 Upper level ridge shifting into the area today but weakening due to increasing energy flowing in from the Pacific.