Aikyam-Lab/Synoptic-Bench huggingface dataset:
In our position west of the center of the high over the central Appalachians we'll see winds coming in from the south around 10 mph this afternoon. Winds will go light tonight as temperatures drop back down to around the freezing mark. On Tuesday, an upper trough diving south along the West Coast will cause ridging to amplify over the eastern half of the CONUS. This will leave high pressure over the East Coast and return flow throughout the Ohio Valley.
Increased clouds help keep temperatures warmer Monday night, with lows in the 20s.
648 AM EST Mon Dec 13 2021 High pressure persists through Tuesday keeping the region dry.
537 AM EST Mon Dec 13 2021 High pressure persists through Tuesday keeping the region dry.
319 AM CST Mon Dec 13 2021 The issue during the short term will be the high and low temperatures for today through Tuesday. Warm upper level ridging builds over the region and then to the east today into Tuesday evening as the western upper level low pressure trough approaches from the west. Therefore, with the low December sun angle, surface heating and the ability to mix up into the warmer air will be the main issue affecting the temperatures. Tuesday is expected to be warmer along and west of the river with lower to mid 50s expected.
At the surface, a pressure trough resides over NE WY and surface winds are gusty again this morning. Slightly warmer weather is expected today under dry, southwesterly flow with weak warm air advection.
By Tuesday night, an approaching trough will bring some lower-elevation snow, followed by occasional hit- and-miss snow showers through the remainder of the work week. Periodic snow showers continue through this morning along the Continental Divide and parts of southwest and west-central Montana today under an increasingly amplifying upper-level pattern as a deep closed low moves south off the Pacific Northwest coast. The snow will taper off a bit this afternoon into tonight as downstream ridging strengthens a bit over central and eastern Montana.
Temperatures at most locations are in the low to mid 20s with some touching the teens. Should bottom out this morning in the low teens north central to the low 20s south. Well above average temperatures continue through the short term as a broad ridge remains over much of the CONUS today and becomes more amplified Tuesday. Highs Tuesday will be the warmer of the two days, especially for southwest North Dakota, where less favorable southeasterly winds take on a more favorable southwesterly component.
Afternoon temperatures rising above freezing under mostly to partially sunny skies will help melt down some of the snow pack. Quiet weather will not last too long as a low pressure system is slated to swing up from Colorado towards southern Hudson Bay.
Dry, quiet weather continues today as column high pressure prevails. E CONUS ridging will maintain dry weather with moderating temperatures through Tuesday night.
The issue during the short term will be the high and low temperatures for today through Tuesday. Warm upper level ridging builds over the region and then to the east today into Tuesday evening as the western upper level low pressure trough approaches from the west. Therefore, with the low December sun angle, surface heating and the ability to mix up into the warmer air will be the main issue affecting the temperatures. Tuesday is expected to be warmer along and west of the river with lower to mid 50s expected.
640 AM EST Mon Dec 13 2021 High pressure persists through Tuesday keeping the region dry.
While high pressure will remain in control through the short term forecast, a coastal trough will lead to some isolated showers today through Tuesday along the coast and Victoria Crossroads. Temperatures will warm into the low to mid 70s for much of South Texas today. You may want to get outside to enjoy the day today because Tuesday will once again be warm with highs in the low to mid 80s.
321 AM CST Mon Dec 13 2021 Well above average temperatures continue through the short term as a broad ridge remains over much of the CONUS today and becomes more amplified Tuesday. Highs Tuesday will be the warmer of the two days, especially for southwest North Dakota, where less favorable southeasterly winds take on a more favorable southwesterly component.
508 AM CST Mon Dec 13 2021 (Today and tonight) Warmer temperatures are forecast across West Central Texas this afternoon, as southwest winds increase to 10 to 15 mph. Highs this afternoon will be in the low to mid 70s.
Some locations in the eastern half of the CWA have fallen into the upper 20s as of 3 AM with slightly warmer readings in the west. The flow aloft remains nearly quasi-zonal over the eastern 2/3 of the CONUS, but will become more southwesterly with time as the trough over the West Coast moves ashore. Mid-level height rises associated with the building subtropical ridge signal a continuation of the warming trend through midweek.
Mean layer ridging continues to dominate the Western Caribbean and the southern Gulf of Mexico. The Keys will remain within the enhanced gradient along the southern flank of this anticyclone. As the high shifts east, northeast to east breezes will shift slowly to the east and southeast.
An upper low pressure system continues to spin just off the Pacific Northwest. The associated trough will further amplify today and continue to bring a moist southwest flow across the Northern Rockies resulting in areas of snow today. Scattered snow showers will continue through the day however road temperatures in the valleys will be above freezing by late morning and this afternoon, thus winter impacts will be minimal across the valleys. The upper low will move inland tonight and Tuesday. Snow will develop across southwest Montana during the afternoon and evening hours as a cold front pushes through the region.
The stalled frontal boundary in place across the central waters will wash out as high pressure builds.
Forecast issue today into Tuesday will be the high wind potential in Carbon county, Converse county, and areas over and near the mountains. Cooler highs in the 40s to around 50 will occur where the snow cover is deeper.
440 AM EST Mon Dec 13 2021 High pressure persists through Tuesday keeping the region dry with warmer than normal highs and colder overnight lows. Subsidence drying will bring another blue sky day for the region with temperature trends reaching into the 50s this afternoon and overnight lows on the cooler side with maximum radiational cooling under clear skies. During the middle of the week, a low pressure system developing to the east of the Rocky Mountains is projected to lift northeast towards Minnesota/Wisconsin and then progress further into Canada.
ABM Chattanooga Airport, TN 34 61 42 63 50 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 31 60 37 63 46 / 0 0 0 0 0 Oak Ridge, TN 30 58 37 61 47 / 0 0 0 0 0 Tri Cities Airport, TN 30 60 34 62 39 / 0 0 0 0 0.
Higher elevations may approach freezing in the pre-dawn hours, producing a threat for patchy freezing fog. Visibilities less than 1/4 mi are not anticipated, and only isolated areas are expected to drop to or below freezing, so no products have been issued at this time. Zonal flow aloft gives way as ridging increases over the Gulf of Mexico mid week.
943 AM CST Mon Dec 13 2021 Increased cloud cover in today's forecast based on stream of high level clouds moving through the broad ridging pattern. Temperatures at most locations are in the low to mid 20s with some touching the teens. Should bottom out this morning in the low teens north central to the low 20s south. Well above average temperatures continue through the short term as a broad ridge remains over much of the CONUS today and becomes more amplified Tuesday. Highs Tuesday will be the warmer of the two days, especially for southwest North Dakota, where less favorable southeasterly winds take on a more favorable southwesterly component.
High temperatures today will range from the low 60s in the north to near 70 in the south.
Temps are mostly in the upper 30s or low 40s at this hour, but with high pressure centered off to our east, southwesterly winds and plenty of sunshine will allow temps to reach the 50s by this afternoon. In our position west of the center of the high over the central Appalachians we'll see winds coming in from the south around 10 mph this afternoon. Winds will go light tonight as temperatures drop back down to around the freezing mark. On Tuesday, an upper trough diving south along the West Coast will cause ridging to amplify over the eastern half of the CONUS. This will leave high pressure over the East Coast and return flow throughout the Ohio Valley.
133 PM MST Mon Dec 13 2021 Current upper air models show the long wave trough situated over the west coast, with mild ridging over the northern plains and southwest flow aloft.
247 PM EST Mon Dec 13 2021 High pressure is currently centered across update South Carolina. The high will begin shifting offshore tomorrow, creating a wedge across eastern portions of the CWA. Dewpoints in the higher terrain are not being captured too well by the model guidance.
1141 AM CST Mon Dec 13 2021 Today will continue to see a day to day increase in high temperatures as an unseasonably strong upper level ridge centers itself over the Great Lakes and Ohio Valley regions through the first half of the work week.
Sunshine is out in full force this morning, helping temperatures climb into the low and mid 50s. We should end up warmer than yesterday with highs in the mid to upper 50s, approaching 60 degrees.
253 PM EST Mon Dec 13 2021 Pleasant mid December afternoon in progress as the region resides under ridging aloft with high pressure centered to the southeast across the southern Appalachians. 19Z temperatures had warmed nicely with reading ranging from the upper 40s and the lower 50s. Much of the short term will remain quiet as the high pressure ridge strengthens to the east of the area while the core of the upper ridge remains centered over the region. Clouds will increase late Tuesday with lighter rain showers expanding across the forecast area by Tuesday night as a warm front moves in. Clouds will be limited in nature through midday Tuesday with just cirrus periodically drifting over top of the ridge aloft and across the region.
1247 PM EST Mon Dec 13 2021 Dry high pressure will prevail through much of the week before a cold front arrives over the weekend. A low level inverted trough axis is expected to tighten along the west wall/thermal gradient of the Gulf Stream through tonight along with a narrow axis of instability nosing into the GA outer waters tonight. But we have maintained a more optimistic sky forecast for today followed by a bit more solid cloud cover spreading into the GA counties tonight as the coastal trough inches toward the coast. A ridge of high pressure will extend south into the region through mid week, while a weak coastal trough lingers offshore at times.
255 PM CST Mon Dec 13 2021 With high pressure now off to our east, return flow will increase moisture across the region.
Will continue to see temps above normal with winds becoming SE in response to develop high plains trough and upper level ridging.
Lows for tonight are forecast to range in the low 30s. For tomorrow, upper ridging will amplify over the eastern two-thirds of the US as a sharp trough enters the West Coast from the Pacific Ocean.
Issued by National Weather Service Cleveland OH 306 PM EST Mon Dec 13 2021 High pressure and dry conditions will prevail through Tuesday.
After lows in the mid-40s to mid-50s, Tuesday's highs only rebound to the upper 60s to lower 70s, which is closer to the cooler 10th percentile of model guidance.
An upper level low will move into the west coast which will cause our southwest winds aloft to increase. This will help maintain lee troughing east of the Rocky Mountains, in turn keeping our winds out of the south, and allowing Gulf moisture to advect into the area tonight and Tuesday. We will also see warmer lows tonight with minimum temperatures only dropping into the mid 40s to lower 50s for the most part.
Water vapor imagery highlights the mean layer ridging that is still dominating the area, showing sinking air across a majority of the Southeast. High pressure centered over the Appalachians is currently building into the region behind a decaying frontal boundary, which has tightened the pressure gradient and enhanced winds. Temperatures will peak in the lower 80s this afternoon and dewpoints will hover around 70 degrees. From synopsis, high pressure will build across the Eastern Seaboard and the western North Atlantic over the next several days.
1232 PM CST Mon Dec 13 2021 (Today and tonight) Warmer temperatures are forecast across West Central Texas this afternoon, as southwest winds increase to 10 to 15 mph. Highs this afternoon will be in the low to mid 70s.
1237 PM EST Mon Dec 13 2021 Cool and dry high pressure remains in place through the middle of the week.
The upper level flow will transition from zonal to northwesterly as an upper level ridge builds over the western Gulf into the lower Mississippi River Valley. Clouds spilling over the ridge will create partly cloudy skies at times during the day on Tuesday. Look for temps tonight to range from the low to mid 40s north of Highway 84 to around 50 degrees over the remainder of inland areas, and in the lower to mid 50s near the coast.
An upper level low will move into the west coast which will cause our southwest winds aloft to increase. This will help maintain lee troughing east of the Rocky Mountains, in turn keeping our winds out of the south, and allowing Gulf moisture to advect into the area tonight and Tuesday. We will also see warmer lows tonight with minimum temperatures only dropping into the mid 40s to lower 50s for the most part. (Tuesday night through next Monday) Warming trend through the end of the week with a cool and potentially wet change of pace by the weekend, as another cold front moves through the area potentially bringing some moisture along with it.
(Tonight) Temperatures are expected to bit warmer tonight than those that occurred last night as southerly winds persist across the region and moisture continues to increase.
Increased cloud cover in today's forecast based on stream of high level clouds moving through the broad ridging pattern. Temperatures at most locations are in the low to mid 20s with some touching the teens. Should bottom out this morning in the low teens north central to the low 20s south. Well above average temperatures continue through the short term as a broad ridge remains over much of the CONUS today and becomes more amplified Tuesday. Highs Tuesday will be the warmer of the two days, especially for southwest North Dakota, where less favorable southeasterly winds take on a more favorable southwesterly component.
1033 AM EST Mon Dec 13 2021 Temps are mostly in the upper 30s or low 40s at this hour, but with high pressure centered off to our east, southwesterly winds and plenty of sunshine will allow temps to reach the 50s by this afternoon. In our position west of the center of the high over the central Appalachians we'll see winds coming in from the south around 10 mph this afternoon. Winds will go light tonight as temperatures drop back down to around the freezing mark. On Tuesday, an upper trough diving south along the West Coast will cause ridging to amplify over the eastern half of the CONUS. This will leave high pressure over the East Coast and return flow throughout the Ohio Valley.
329 PM EST Mon Dec 13 2021 Dry high pressure will prevail through much of the week before a cold front arrives over the weekend. At the surface, high pressure will remain situated to the north with a coastal trough over the coastal waters that extends northward from off the east coast of Florida. The combination of the trough aloft and the coastal trough at the surface will be enough to kick off at least scattered showers over the coastal waters beyond our local waters.
1010 AM EST Mon Dec 13 2021 High pressure will build over the region through the middle of the week, with dry conditions and gradually warming temperatures. The high will shift offshore late in the week and the developing southerly flow will cause temperatures to rise well above normal late in the week into the early weekend.
Strong high pressure will be north of the region this period. An inverted trough will be over area waters. This trough will provide for a source of convergence in a somewhat moist onshore flow, leading to the potential for a few coastal showers Tonight. A better chance for coastal showers anticipated for Tuesday as the trough moves onshore. To the south of where the trough is expected to come ashore over much of NE FL, highs will be in the lower to middle 70s.
Cooler temperatures for the upcoming work week will bring a return to lowland snow potential. This low will continue to strengthen as it lifts north today, producing another band of moderate precipitation over the Cascades, Wenatchee area, Waterville Plateau, Okanogan Valley, and Okanogan Highlands from this afternoon into the evening. The Coles Corner area may also get a burst of additional accumulation, but latest model data suggest the higher precipitation rates may be focused east of this area but confidence is not high of this since the easterly flow is often favorable for this area. For the Wenatchee area and Okanogan Valley, surface temperatures at or slightly above freezing is expected to limit additional accumulation potential for most towns which are below 1500 feet. Runway accumulations are most likely for Winthop and Republic where temperatures will be at or below freezing.
Under very broad ridging across much of the CONUS, well above normal temperatures were observed across western and central North Dakota this afternoon.
543 PM CST Mon Dec 13 2021 A deep upper trough and closed low was currently located just off the Pacific NW coast. A strong H3 jet is rotating around this upper trough, then east along the U. Tuesday night, the closed low associated with the deep upper trough will move to just west of the Four Corners Region.
304 PM CST Mon Dec 13 2021 An elongated mid/upper ridge stretched across the central CONUS today while a vigorous trough was impacting California. As we move into Wed, a vigorous mid/upper trough is progged to lift negatively tilted across the Rockies.
Pleasant mid December afternoon in progress as the region resides under ridging aloft with high pressure centered to the southeast across the southern Appalachians. 19Z temperatures had warmed nicely with reading ranging from the upper 40s and the lower 50s. Much of the short term will remain quiet as the high pressure ridge strengthens to the east of the area while the core of the upper ridge remains centered over the region. Clouds will increase late Tuesday with lighter rain showers expanding across the forecast area by Tuesday night as a warm front moves in. Clouds will be limited in nature through midday Tuesday with just cirrus periodically drifting over top of the ridge aloft and across the region.
Issued by National Weather Service Jackson KY 700 PM EST Mon Dec 13 2021 High pressure and dry conditions will prevail through Tuesday.
High pressure along the mid Atlantic seaboard has resulted in a steady northeast to easterly flow over the Florida Keys and coastal waters, and this will change little over the next 24 hours.
A warm front will move north across the area overnight into Tuesday and with increased moisture, clouds will be on the increase across the Delta, with a few showers possible into Tuesday afternoon. Upper ridging will strengthen over the area on Tuesday, with high temperatures ranging from the mid 60s across the Golden Triangle area to the mid 70s in the southwest.
356 PM CST Mon Dec 13 2021 Ridging aloft will keep the will keep us dry through Tuesday with pleasant December temperatures. WAA really cranks up Tuesday night with much of the area staying above freezing.
606 PM CST Mon Dec 13 2021 The only notable change for this update is to add a mention of fog to portions of northwest and north central North Dakota late tonight through Tuesday morning, mainly along the eastern slope of the higher terrain west of the Des Lacs River. Under very broad ridging across much of the CONUS, well above normal temperatures were observed across western and central North Dakota this afternoon.
644 PM EST Mon Dec 13 2021 Dry high pressure will prevail through much of the week before a cold front arrives over the weekend.
With winds in the boundary layer staying up enough, along with cloud cover, do not expect radiational fog, and the wind direction more from the east and not southeast, would not expect any sea fog that may form to move onshore, and the low ceilings should be the main aviation concern tonight.
317 PM CST Mon Dec 13 2021 Mild mid-December weather in store over the next several days, as an upper level ridge builds through the MS River valley, downstream of a progressive trof moving through the Great Basin.
Isentropic lift beginning to subside this afternoon, especially across southern portions of the area as the coastal trough weakens.
422 PM MST Mon Dec 13 2021 Current upper air models show the long wave trough situated over the west coast, with mild ridging over the northern plains and southwest flow aloft.
508 PM CST Mon Dec 13 2021 (Tonight) Temperatures are expected to bit warmer tonight than those that occurred last night as southerly winds persist across the region and moisture continues to increase.
Dew point depressions should be such that some patchy fog is possible overnight and even though temperatures are going to be at or just below freezing east of I-65 tonight, fog shouldn't be thick enough to cause any freezing fog issues. Tomorrow should be another fantastic day with plenty of sunshine and temperatures 4-6 degrees warmer than today. High pressure will remain in control through the taf cycle with the center of the high moving off to the east.
High pressure to our east has kept skies clear and winds light this evening. Zonal flow aloft gives way as ridging increases over the Gulf of Mexico mid week.
High pressure strung along the Appalachian chain tonight shifts toward the eastern seaboard Tue. Moisture is somewhat on the low side with model PWAT values 1. The moisture is in the lower levels and will support late night patchy fog and low cloudiness that lifts and mixes out around 10 AM. A weak frontal boundary washes out over the southern waters tonight as high pressure centered north of the waters eases to the east.
/issued 317 PM CST Mon Dec 13 2021/ Mild mid-December weather in store over the next several days, as an upper level ridge builds through the MS River valley, downstream of a progressive trof moving through the Great Basin.
523 PM CST Mon Dec 13 2021 Upper level ridge will remain anchored over the region in the short term, while a system comes on shore over the western CONUS. As the system strengthens and deepens the trough over the western CONUS, southwesterly flow will increase over the region with rapid warm-up still expected.
301 PM CST Mon Dec 13 2021 A cloud-free day with wind returning from the south has brought back warmer temperatures this afternoon. Temps will fall into the 30s overnight, staying slightly warmer than this morning. High pressure and a warming trend will remain in place for the next couple of days before a more active pattern resumes later in the week.
504 PM CST Mon Dec 13 2021 Ridging aloft will keep the will keep us dry through Tuesday with pleasant December temperatures. WAA really cranks up Tuesday night with much of the area staying above freezing.
656 PM EST Mon Dec 13 2021 The afternoon surface analysis shows high pressure remains parked off to the south centered in the Greater Tennessee Valley. This will keep the weather quiet in conjunction with rising heights due to expansive ridging and increasing 850mb temperature under warm air advection pattern. The dry air will also lead to decent ridge/valley temperature splits which will be most noticeable tonight, with valley lows in the mid and upper 20s and upper 20s to lower 30s on the ridges.
Winds will increase over the higher terrain (HRO, BPK) by late afternoon, with LLWS developing at 35 KT around FL020.