Aikyam-Lab/Synoptic-Bench huggingface dataset:
335 PM MST Sun Dec 1 2019 Upper ridge over the area will break down on Monday with flow aloft increasing and becoming westerly by afternoon as the next upper trof approaches from the northwest. High clouds will continue to invade from the west which in combination with lee troughing tonight will help keep low temperatures warmer than last night where westerly drainage winds set up. Should be another cold night for the poorly draining valley locations (San Luis and Rio Grande valleys) though high clouds should keep temperatures slightly warmer here too. Lee trough and westerly winds should help temperatures rebound into the 50s and 60s across the plains with 40s to near 50s for the valleys and lower mountain locations. Will see increasing winds across the higher elevations through the day ahead of the next approaching system.
This will set the stage for a cold night as high pressure briefly settles over the region, adding light winds into the combination of clear skies and fresh snowpack. Given these conditions, went with the low end of guidance for lows tonight for all but the heart of the Twin Cities metro, with most locations outside of the metro getting down into the single digits above zero tonight. As the high slides east, we will see winds turn to the southwest, with mid/upper clouds increasing during the afternoon as WAA increases ahead of a wave that will be moving across the international border.
305 AM EST Mon Dec 2 2019 High pressure will bring dry and fairly seasonable weather through much of the week.
1027 PM MST Sun Dec 1 2019 06Z TAF CYCLE VFR conditions and light winds are forecast for all terminals underneath a building upper-level ridge. A ridge of high pressure aloft will flatten tonight and tomorrow with dry westerly flow prevailing.
212 AM CST Mon Dec 2 2019 Aside from patchy morning fog across the southern James Valley this morning, expect quiet weather across western and central North Dakota today and tonight with warmer temperatures. Temperatures will be the warmest across western North Dakota where warm air advection will combine with increasing sunshine, with highs likely making it into the lower 40s. Further east, highs will stay stuck in the low to mid 30s due to excess cloud cover and fresh snowpack.
940 PM CST Sun Dec 1 2019 The first night of the climatological winter is bringing more winter-like weather to the forecast area as drier and much cooler air behind our departing cold front from last night has led to clear skies and temps in the upper 40s to mid 50s as of 03z. Meanwhile a secondary re-enforcing cold front is noted crossing the area at this time with dewpoints down into the 40s behind it.
Upper level low pressure system continues to lumber away from the area taking most of the stronger disturbances with it.
A moist southwest flow aloft will continue to bring widespread snow through Monday morning, which may mix with or change over to rain in the lower valleys. The dry weather will continue through Tuesday as high pressure builds into the region.
Fair and cooler conditions expected through Tuesday.
Light winds earlier this morning will become west southwest at 10 to 20 mph during the afternoon as a trough of low pressure begins to develop across eastern Colorado.
1235 AM EST Mon Dec 2 2019 A mix of rain and snow showers will continue tonight into Monday morning as an upper level low moves through. Some slushy snow accums cannot be ruled out this evening/early overnight with little impact anticipated to roads as sfc temps likely stay above freezing into much of tonight.
940 PM CST Sun Dec 1 2019 Latest surface analysis indicates high pressure centered over West Texas. High pressure center should continue to slide eastward tonight, and wind should correspondingly continue to gradually decrease.
Given the intensity of both cyclones, W-NW winds will remain elevated for roughly the next 24 hours. Additionally, as moisture wraps around the back side of the retreating upper low, widespread cloud cover has dipped southward across the northern third of the state.
The combination of clearing skies and decreasing winds tonight will allow temperatures to drop into the low and mid 20s across the area by early tomorrow morning. Winds will gradually shift back to a southerly direction tomorrow as high pressure slides south of the area and lee cyclogenesis occurs to our west. A subtle upper trough will move over the area on Tuesday bringing some cloud cover back to our sky. Weak WAA ahead of the trough will aid in temperatures reaching the low 50s Tuesday afternoon. Conditions will stay dry into mid week with high pressure once again in control.
243 AM CST Mon Dec 2 2019 Current water vapor analysis depicts an upper level ridge axis running along the Rocky Mountains leaving the Panhandles under northwest flow aloft. The upper level low that was over Iowa yesterday at this time is now over Ohio.
/Issued 940 PM CST Sun Dec 1 2019/ Latest surface analysis indicates high pressure centered over West Texas. High pressure center should continue to slide eastward tonight, and wind should correspondingly continue to gradually decrease.
1036 PM MST Sun Dec 1 2019 A transitory ridge of high pressure will remain overhead through this evening resulting in quiet weather across eastern Utah and western Colorado. Upper level flow will shift to the southwest tonight as the ridge slides east. Locally higher amounts in excess of 6 inches could fall at the highest peaks.
Quiet conditions arrive today with the mid level ridge axis overhead this morning ahead of a weak wave and front for later in the day and overnight.
245 AM EST Mon Dec 2 2019 An unseasonably strong mid and upper level low will wobble across the region through this afternoon. Otherwise, high pressure will remain in control through mid to late week. Lows in the lower to mid 30s.
A weak trough will pass through the area dry on Monday leading to a wind shift throughout the day. Winds behind the trough Monday night into Tuesday increase out of the northwest.
213 AM CST Mon Dec 2 2019 Early morning analysis showed the weekend low pressure system well off to the southeast, with the only associated weather in the forecast area being some lingering cloud cover and occasional wind gusts near 20 mph. As ridging aloft and at the surface continues to build in, expect clouds to move out and winds to decrease substantially by mid-morning or so. However, temperatures tonight will be warmer than last night as southerly flow returns and leads to lows in the mid teens to mid 20s north to south across the area.
203 AM EST Mon Dec 2 2019 An unseasonably strong mid and upper level low will wobble across the region through this afternoon. Otherwise, high pressure will remain in control through mid to late week. Lows in the lower to mid 30s. With high pressure over the Gulf States, expect weak wsw low level flow in repsonse to the approaching trough and highs near low level thicknesses (1320m). The approaching trough will bring a fair amount of mid and high-level moisture with it, but forecast soundings are still very dry below 700mb.
251 AM CST Mon Dec 2 2019 Remnant clouds across far northeast Oklahoma and northwest Arkansas are expected to exit this morning as high pressure builds into the area.
1050 PM CST Sun Dec 1 2019 Cold high pressure will move over wrn and ncntl Nebraska tonight and this should open a window for strong radiational cooling for at least a few hours before return flow develops. A weak cold front will move through wrn and ncntl Nebraska Monday night.
Strong cold air advection over warmer water is producing gusts 30-35kt at KNEW and other exposed marine locations like KBVE.
Weak high pressure will be over the area Monday and Tuesday.
1020 PM MST Sun Dec 1 2019 Upper level analysis has ridging over the Four Corners region with large trof downstream across the Great Lakes region. At the surface, high pressure is located across the Northern Plains with a weak lee trof across central Montana and northeastern Wyoming. Upper level ridge will build into the Northern Plains overnight with mostly clear to partly cloudy skies and seasonable temperatures. From Tuesday into the weekend, mean ridging is expected over the Northern Plains with dry conditions and near seasonal temperatures.
Starry skies lead to sunny skies tomorrow with a continued north wind and the day struggling to warm into the lower 60s.
223 AM EST Mon Dec 2 2019 An unseasonably strong mid and upper level low will wobble across the region through this afternoon. Otherwise, high pressure will remain in control through mid to late week. Lows in the lower to mid 30s.
Broad ridging in the upper levels will translate across the nations midsection Monday night ahead of a fast moving speed max that moves over the Ozarks on Tuesday. This feature will force a cold front through the area, however, little moisture return will occur ahead of it.
The departing low will be replaced by high pressure today with winds gradually decreasing throughout the day. Do not expect precipitation with this disturbance as soundings show a decent amount of dry air in the low levels. Temperatures Tuesday will be warmer with most areas in the upper 30s.
1015 PM MST Sun Dec 1 2019 Upper ridge over the area will break down on Monday with flow aloft increasing and becoming westerly by afternoon as the next upper trof approaches from the northwest. High clouds will continue to invade from the west which in combination with lee troughing tonight will help keep low temperatures warmer than last night where westerly drainage winds set up. Should be another cold night for the poorly draining valley locations (San Luis and Rio Grande valleys) though high clouds should keep temperatures slightly warmer here too. Lee trough and westerly winds should help temperatures rebound into the 50s and 60s across the plains with 40s to near 50s for the valleys and lower mountain locations. Will see increasing winds across the higher elevations through the day ahead of the next approaching system.
145 AM CST Mon Dec 2 2019 Aside from patchy morning fog across the southern James Valley this morning, expect quiet weather across western and central North Dakota today and tonight with warmer temperatures. Temperatures will be the warmest across western North Dakota where warm air advection will combine with increasing sunshine, with highs likely making it into the lower 40s. Further east, highs will stay stuck in the low to mid 30s due to excess cloud cover and fresh snowpack.
An uneventful period can be expected tonight through late Monday afternoon as weak ridging aloft moves across the Colorado Rockies into the Western High Plains. Well below freezing temperatures are likely tonight despite the aforementioned prevailing downslope flow beginning to slowly erode the colder air mass in place. Much warmer temperatures can be expected Monday as a developing lee side trough sets creates a more southwesterly downslope flow across western Kansas. This will draw warmer air into the area pushing H85 temperatures above 5C. However, with a drier air mass already settled across the high plains, a dry frontal passage is likely.
Cold front over se Ga will move across ne Fl this evening bringing a chance of showers and strong gusty winds. Much colder air will advect in behind the cold front with gusty winds persisting through Monday.
A new weak cold front will drop SE through the state Tue night.
1136 PM CST Sun Dec 1 2019 The low pressure system responsible for the strong winds and light snow yesterday and last night is departing the area to the east. On Monday we should warm up a bit as midlevel ridging builds overhead and southwesterly winds return at the surface.
For the big picture, cold front now just to our east. Chattanooga Airport, TN 42 31 49 34 55 / 20 0 0 0 0 Knoxville McGhee Tyson Airport, TN 40 32 46 34 50 / 40 10 0 0 0 Oak Ridge, TN 40 31 46 32 50 / 40 10 0 0 0 Tri Cities Airport, TN 38 30 41 31 45 / 50 30 0 0 0 TN.
Yesterday's cold advection will result in high temperatures today being slightly cooler as high pressure settles over our area. High pressure drifts off to the east Tuesday with southwesterly winds warming high temperatures several degrees.
The upper low we have been advertising is currently centered over Central Ohio with a spoke yet to rotate around the south side of the low. Gathering from reports, the highest elevations along the northern plateau have switched or are switching to snow now.
413 AM CST Mon Dec 2 2019 Upper level ridging has begun to establish itself across the forecast area this morning which will lead to fairly uneventful weather this week. Surface lee troughing today will lead to some breezy southwest winds late this morning through the afternoon with wind speeds of 15-25 mph for most locations.
A 1020mb cold high pressure axis has settled into eastern parts of Nebraska and the Dakotas leaving the vast majority of eastern Nebraska anemometers recording wind speeds of under 5kts at this hour.
920 AM EST Mon Dec 2 2019 High pressure will bring dry and fairly seasonable weather through much of the week.
The low pressure that brought us the rain/snow yesterday continues to slowly pull away from the region. Earlier, some isolated brief pockets of freezing drizzle were seen. Bridges and overpasses will be most susceptible. Today, the northwest winds will gradually subside as high pressure builds into the area. Tonight, nearly calm winds will become light out of the southwest as a weak trough of low pressure approaches from the northwest.
Aside from patchy morning fog across the southern James Valley this morning, expect quiet weather across western and central North Dakota today and tonight with warmer temperatures. Temperatures will be the warmest across western North Dakota where warm air advection will combine with increasing sunshine, with highs likely making it into the lower 40s. Further east, highs will stay stuck in the low to mid 30s due to excess cloud cover and fresh snowpack.
452 AM CST Mon Dec 2 2019 Cool and blustery day today, though not quite as windy as yesterday, as a deep upper low lifts from central Appalachia to the mid-Atlantic seaboard. GFS and NAM depict the 850mb thermal trof to translate east into middle TN today, with otherwise neutral instantaneous thermal advection from upstream in eastern MO. A Pacific surface pressure ridge will settle into the Midsouth tonight, under low amplitude midlevel ridging.
536 AM CST Mon Dec 2 2019 Early morning analysis showed the weekend low pressure system well off to the southeast, with the only associated weather in the forecast area being some lingering cloud cover and occasional wind gusts near 20 mph. As ridging aloft and at the surface continues to build in, expect clouds to move out and winds to decrease substantially by mid-morning or so. However, temperatures tonight will be warmer than last night as southerly flow returns and leads to lows in the mid teens to mid 20s north to south across the area.
Owing to the proximity of a departing cyclone, brisk north winds continue across the northeastern half of the area. Eastland has been in the 20s since midnight, and additional locations will see freezing temperatures as the winds continue to subside through daybreak. After a seasonally cool morning Tuesday, temperatures will soar above normal before the next cold front invades late in the day.
VFR to prevail with steady NW to N winds through the day, with winds decreasing tonight as high pressure settles into the area. Deep trough over the eastern CONUS continues to slide eastward while upper level riding builds over the Four Corners region, providing continued northwest flow aloft over the south. The high will become better centered over Louisiana Monday night into Tuesday.
Heights aloft will rise again on Tuesday with a building ridge. This feature will support warmer sfc temps, though cannot rule out some low-level morning fog again across central SD. A couple of weak systems or fronts will move through that will either allow a modified Pacific airmass to maintain itself over the area or bring in a cooler, Canadian type airmass.
/issued 413 AM CST Mon Dec 2 2019/ Upper level ridging has begun to establish itself across the forecast area this morning which will lead to fairly uneventful weather this week. Surface lee troughing today will lead to some breezy southwest winds late this morning through the afternoon with wind speeds of 15-25 mph for most locations.
301 AM CST Mon Dec 2 2019 The low pressure that brought us the rain/snow yesterday continues to slowly pull away from the region. Earlier, some isolated brief pockets of freezing drizzle were seen. Bridges and overpasses will be most susceptible. Today, the northwest winds will gradually subside as high pressure builds into the area. Tonight, nearly calm winds will become light out of the southwest as a weak trough of low pressure approaches from the northwest.
346 AM MST Mon Dec 2 2019 Upper ridging continues across the region this morning. A trough is expected to cross the CWA, with a switch to west/northwest winds later in the evening. The broad ridging setting up over the northern Plains will bring continued dry weather and near to slightly above average temperatures.
Deep trough over the eastern CONUS continues to slide eastward while upper level riding builds over the Four Corners region, providing continued northwest flow aloft over the south. The high will become better centered over Louisiana Monday night into Tuesday.
Roads in most areas are snow-covered or icy, and wet or slushy in the remaining areas, but temperatures will get above freezing today and roads below 5000 feet should become wet by late morning.
209 AM MST Mon Dec 2 2019 Upper ridging continues across the region this morning. A trough is expected to cross the CWA, with a switch to west/northwest winds later in the evening. The broad ridging setting up over the northern Plains will bring continued dry weather and near to slightly above average temperatures.
Dry weather will continue through Tuesday with slightly warmer than normal afternoon temperatures.
755 AM EST Mon Dec 2 2019 An unseasonably strong mid and upper level low will wobble across the region through this afternoon. Otherwise, high pressure will remain in control through mid to late week. More noticeably will be the strong, gusty winds throughout the day as the pressure gradient increases between the deepening low to the northeast and the high approaching from the southwest. With the upper low exiting the region and strong subsidence expected, skies should clear and allow for some radiational cooling.
507 AM CST Mon Dec 2 2019 The winds have finally settled down as the low pressure system moves off to the east, but will be just high enough for wind chills this morning to dip into the teens.
Additionally, with the upper low passing to the north of the TN Valley, we have some large scale, upper level support that is helping to maintain a broad, but very light area of precip north of the area. Otherwise, with lingering cloud cover expected through the afternoon, temps are only expected to rebound into the low 40s across the region. In its wake, more zonal flow will develop in the mid/upper levels through Tuesday as a broad area of high pressure sets up over the southeast US.
The amplification trend will progress downstream, eventually leading to the development of an upper trough over central NOAM by the end of the period. The developing pattern favors quiet weather, as the forecast area remains between a series of weak cyclones traveling east across central Canada and broad high pressure stretched out from the central Rockies to the southeastern states. A return to more active weather is possible late in the period as the upper trough begins to form. So structured the forecast with the lowest mins there, and used an atypical diurnal trend with mins early in the night followed by steady/rising temperatures after midnight.
/issued 452 AM CST Mon Dec 2 2019/ Cool and blustery day today, though not quite as windy as yesterday, as a deep upper low lifts from central Appalachia to the mid-Atlantic seaboard. GFS and NAM depict the 850mb thermal trof to translate east into middle TN today, with otherwise neutral instantaneous thermal advection from upstream in eastern MO. A Pacific surface pressure ridge will settle into the Midsouth tonight, under low amplitude midlevel ridging.
334 AM CST Mon Dec 2 2019 The winds have finally settled down as the low pressure system moves off to the east, but will be just high enough for wind chills this morning to dip into the teens.
616 AM EST Mon Dec 2 2019 High pressure will bring dry and fairly seasonable weather through much of the week.
Travel difficulties persist across the higher elevations. Stream of moisture continues to move up from the south southwest ahead of the low near 40N/130W. The upper low will drop southward along 130W today.
Low temperatures tonight are expected to be 5-10 degrees warmer than what is occurring early this morning. Overnight lows should range from the mid 30s in some of the sheltered/low-lying areas of our eastern and southern counties, to the lower 40s across parts of the Big Country.
Latest 00z ensemble 500mb heights point to upper ridging building stronger over the western U.
Highs this afternoon are expected to range from the mid 50s across the Big Country (area along/north of I-20), to the lower 60s along the I-10 corridor. Surface pressure ridge across our area tonight will facilitate good radiational cooling conditions with light winds, clear skies and dry air in place.
Highs today will be in the 40s over Nebraska and into the low 50s in north central Kansas. These areas are expected to be the coolest with highs in the low 40s expected.
Skies will remain almost entirely clear and overall conditions should feel fairly pleasant with dew points in the low to mid 30s.
/issued 324 AM CST Mon Dec 2 2019/ Upper ridge building in from the west will result in mild wx this week.
As a result, stratus has pushed east of our area with weak mid-level ridging set up over the Rockies to bring us clear skies.
324 AM CST Mon Dec 2 2019 Upper ridge building in from the west will result in mild wx this week.
/Issued 243 AM CST Mon Dec 2 2019/ Current water vapor analysis depicts an upper level ridge axis running along the Rocky Mountains leaving the Panhandles under northwest flow aloft. The upper level low that was over Iowa yesterday at this time is now over Ohio.
Going into today, as with the past several model runs, an upper ridge over the Rockies will shift east into the Plains region providing zonal flow over the area. At the surface, high pressure will shift east of the region as lee-side troughing sets up over the eastern slopes of the Rockies. The passage of the two systems on Tuesday does shift winds to the NNW, and with high pressure coming quickly in behind these as they exit east, the gradient provided could bring speeds near 15-30 mph for the afternoon hours ahead of approaching ridge.
Today and Tonight: The upper trough was just to the northeast of the area. Northwest flow was bringing much cooler and drier air into the region from Canada where values were in the teens and single digits. By late afternoon the center of the high will be moving into the area, so look for good radiational cooling tonight with lows around 30. Models have consistently shown cooler conditions to start the week.
A split upper low continues to spin off the northern California coast. The northern branch trough will provide the more influential dynamics, while the southern stream provides most of the moisture. Temperature profiles this morning support some pockets of freezing rain in the Eastern Magic Valley, but ice accumulations should be light.
The upper trough was just to the northeast of the area. Northwest flow was bringing much cooler and drier air into the region from Canada where values were in the teens and single digits. By late afternoon the center of the high will be moving into the area, so look for good radiational cooling tonight with lows around 30. Models have consistently shown cooler conditions to start the week.