Aikyam-Lab/Synoptic-Bench huggingface dataset:
Warmer temperatures and light precipitation chances highlight the short term forecast period. Upper level ridging moves in through the day with the ridge axis making its way across the state through the afternoon. At the surface, a warm front will also move across western and central North Dakota. Areas across the central will mainly be in the low to mid 30s. But there should be enough of an influence as it interacts with the warm front to bring some light snow to the north through the afternoon. Later on this evening and tonight, a cold front and another weak wave approaches from Montana. Lows will range from the lower teens to lower 20s. Thursday will be a bit cooler than today behind the front.
645 AM EST Wed Dec 8 2021 This weeks warming trend will be interrupted by a weekend cold front. Snow is ending with mid level dry advection and eastward shifting frontogenetical forcing as per longwave trough encroachment. This trough will maintain below average temperature today with highs 5 to 10 degrees below avg forecast. Ridging will maintain dry conditions tonight and Thursday. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
As a result we are seeing some light snow or light freezing drizzle across portions of the upper Snake Plain. A cold front will arrive this afternoon. We will see some light rain and snow, mainly in the high country and portions of the Snake Plain and Magic Valley relatively close to the higher terrain where upslope dynamics may occur.
Downsloping winds off the Laramie Range under a brief ridging pattern will also help raise temperatures across eastern Wyoming and western Nebraska into the upper-50s.
A weather disturbance and associated cold front will bring increases chances for rain and snow later this afternoon across northern Nevada before spreading further southeastward tonight and Thursday morning. West-southwest winds across the area are anticipated to increase today ahead of a upper trough and frontal system. Wind speeds of 10 to 15 mph with gusts to 25 mph should occur across most of the CWA with higher gusts along ridgetops.
An upper level ridge moves across our area today keeping skies clear and the sunshine abundant. The western edge of this ridge reaches into the desert southwest encouraging warm air to migrate northward.
Today Through Thursday Night Northwest flow aloft will be replaced by a southwest flow in the near term as a trough digs into the Rockies the next couple of days. As high pressure shifts to the east tonight/Thursday, and a warm front slides through the region from the Plains, changes will occur.
Lee troughing will continue to prevail today across the High Plains of eastern Colorado. One caveat to this is there could be increasing high clouds later today as UL trof approaches from the southwest tonight. A warm front will begin to lift northward, bisecting a portion of the FA. North of the warm front, relatively cool upslope easterly flow is expected.
Temperatures will trend warmer through late week with rain to start the weekend. Upper level trough passes through around 00Z Thu with strengthening low pressure off the New England coast. A brief period of lake effect snow showers are possible across the NW mtns early tomorrow night before fading into Thursday as high pressure slides into the southern Mid Atlantic region.
An approaching short wave from the west passing through southern Colorado and northern NM will help deepen lee side trough through eastern CO and NM and bring about dry and gusty SW winds this afternoon. This cyclone will increase the pressure gradient over the area, resulting in breezy downslope winds Thursday afternoon.
522 AM CST Wed Dec 8 2021 West to southwest flow in an upper ridge coupled with south to southeast developing breezes at the sfc ahead of a Rocky Mtn low will combine to usher in some warmer air today. Depending on timing of the low's movement, Thursday's highs could occur in the morning before caa filters in behind the low.
401 AM MST Wed Dec 8 2021 NE PAC upper trough will cycle in the period as the current trough pushes east in longer wave form, with a new round of troughing developing this weekend. Split flow impulse will push a cold front through the region tonight, with some light snow developing over NE WY and the northern Black Hills, any amounts will generally be an inch or less.
/issued 338 AM CST Wed Dec 8 2021/ SHORT TERM (Now through Thursday): Mid-level high pressure begins to build across Deep South Texas as a 500mb trough works into the Rockies from the west, turning the flow aloft more southwesterly into Thursday. Low pressure comes off the Rockies and into the Plains on Thursday, strengthening the pressure gradient along the lower Texas coast, with moderate southerly winds by Thursday afternoon. As for temperatures, most locations will top normal highs this afternoon, landing into the low 80s.
Overcast skies continue to hang around over northwest Minnesota this morning ahead of a sweeping cold front. Looking at forecast soundings, a stout warm nose is apparent at 850mb above the freezing layer.
529 AM PST Wed Dec 8 2021 Dry today, then a low pressure system from the northwest will bring showers for late tonight into Thursday, ending Thursday evening. It will be much cooler for Thursday with periods of stronger and gusty southwest to west winds for the mountains and deserts for late tonight through Thursday.
532 AM CST Wed Dec 8 2021 Overcast skies continue to hang around over northwest Minnesota this morning ahead of a sweeping cold front. Looking at forecast soundings, a stout warm nose is apparent at 850mb above the freezing layer.
Behind this weak front, high pressure ridging builds behind it on Thursday and remains in place before the weekend.
329 AM CST Wed Dec 8 2021 Warmer temperatures and light precipitation chances highlight the short term forecast period. Upper level ridging moves in through the day with the ridge axis making its way across the state through the afternoon. At the surface, a warm front will also move across western and central North Dakota. Areas across the central will mainly be in the low to mid 30s. But there should be enough of an influence as it interacts with the warm front to bring some light snow to the north through the afternoon. Later on this evening and tonight, a cold front and another weak wave approaches from Montana. Lows will range from the lower teens to lower 20s. Thursday will be a bit cooler than today behind the front.
South to southwest winds will start to increase across the western Mojave Desert and at the higher elevation tonight and continue into Thursday. Trough will be moving southeast through the central Sierra Thursday morning with showers developing over Inyo County and south central Nevada. Trough will remain progress and track across southern Nevada and northwest Arizona Thursday afternoon and evening. Precipitation will end abruptly Thursday night as the trough axis races east through Arizona.
410 AM CST Wed Dec 8 2021 West to southwest flow in an upper ridge coupled with south to southeast developing breezes at the sfc ahead of a Rocky Mtn low will combine to usher in some warmer air today. Depending on timing of the low's movement, Thursday's highs could occur in the morning before caa filters in behind the low.
338 AM MST Wed Dec 8 2021 Radar imagery indicates that at least flurries if not light snow is present from north central Montana and south central Saskatchewan through east central Montana with this current weak trough/disturbance. The warm front is obviously located from central Blaine County through our Phillips and Garfield Counties and moving fairly quickly northward. Still uncertain how the new snow pack will impact the ability to climb warmer than 40 degrees further toward the Hi-Line.
709 AM EST Wed Dec 8 2021 A weak short wave trough tracks along the northern Gulf coast today. pushing a decaying frontal boundary into north and north-central Fl and shifts high pressure currently across the area to the southeast.
256 PM EST Wed Dec 8 2021 A mean layer ridge lies across the area with the axis approaching the Florida Keys. The ridge is also suppressing any chance at precipitation and skies have mostly cleared out from this morning. The aforementioned ridge will continue its northward trek overnight. The ridge over us now will help to keep this front bottle up to our north.
West to southwest flow in an upper ridge coupled with south to southeast developing breezes at the sfc ahead of a Rocky Mtn low will combine to usher in some warmer air today. Depending on timing of the low's movement, Thursday's highs could occur in the morning before caa filters in behind the low.
Increasing cloud cover, winds, and moisture throughout the night will lead to warmer lows tonight.
/issued 709 AM EST Wed Dec 8 2021/ A weak short wave trough tracks along the northern Gulf coast today. pushing a decaying frontal boundary into north and north-central Fl and shifts high pressure currently across the area to the southeast.
1231 PM EST Wed Dec 8 2021 The warming trend after todays light snow and cold will be interrupted by a weekend cold front. Light snow associated with a crossing upper trough will shift east of the ridges later this afternoon. The cold surge with this trough will maintain below average temperature through tonight with overnight lows about 5 degrees below avg forecast. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
(This evening through Thursday) Southerly winds will continue to increase over Wednesday afternoon into Thursday, continuing the advection of warmer air and some higher dewpoints into the region. Ahead of the upper level trough moving through the southwestern US and towards the central US, lee side cyclogenesis will begin occuring through eastern Colorado, and the tightening surface pressure gradients will result in an increase of winds through Oklahoma and western north Texas.
1045 AM PST Wed Dec 8 2021 Dry weather today ahead of a low pressure system moving from the northwest that will bring showers late tonight through Thursday.
1008 AM EST Wed Dec 8 2021 This weeks warming trend will be interrupted by a weekend cold front. The late morning update included the addition of a flurry mention as per radar returns under the advancing upper trough. This trough will maintain below average temperature today with highs about 10 degrees below avg forecast. Ridging will maintain dry conditions tonight and Thursday. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
304 PM EST Wed Dec 8 2021 Discussion/Marine - Diminishing snow this evening An area of high pressure in IA builds east through the remainder of the evening and into MI tonight. - Period of light snow Thursday Warm air advection strengthens on Thursday as a weakening wave of low pressure moves in from the west. The low levels will initially be dry when the DGZ moistens up and then by the time the low levels saturate. While surface temperatures are progged to rise a few degrees above freezing. if we lose the saturation at the DGZ when surface temperatures are below freezing. there could be a window for freezing drizzle which will need to be monitored.
249 PM EST Wed Dec 8 2021 The upper-level longwave trough axis has shifted east of the CWA this afternoon, placing north and central GA beneath northwesterly flow aloft as dry air and subsidence work in. Had to adjust the temperature forecast down several degrees this afternoon thanks to a persistent cloud deck and CAA behind a weak surface cold front. Lows tonight will fall to the lower 30s to mid-40s, with patchy fog possible across portions of central GA.
338 PM EST Wed Dec 8 2021 The warming trend after todays light snow and cold will be interrupted by a weekend cold front. Snow should continue to end as the axis of an upper trough begins to shift east of the area. The cold surge behind the trough will maintain below average temperature through tonight with overnight lows about 5 degrees below avg forecast. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
Do expect our highs to be a little warmer as well with WAA into the area.
Temps will continue to warm a bit more today, with highs still on track to reach the low 50s for most.
Temperatures are a little cooler in the northern Big Country where mid to to high level cloud cover is streaming overhead. Expect mild conditions overnight, with lows generally in the lower to mid 50s.
1051 AM PST Wed Dec 8 2021 The afternoon will become windy following the passage of a cold front. As of 10AM, a quick moving cold front had crossed the Idaho Panhandle. The afternoon will be windy across much of central and eastern Washington as well as the Idaho Palouse and exposed ridges of north Idaho. /GKoch 18Z TAFs: Low clouds and fog are eroding quickly from south to north following the passage of a morning cold front.
Some very light snow showers or flurries occurred in the last few hours across parts of the higher elevations of southwest Virginia and most likely across the higher elevations of the eastern Tennessee mountains above 4000 feet north of Interstate 40. Temperatures this morning were in the lower 30s in the colder locations but little if any accumulation likely occurred. For the rest of today skies will continue to clear as broad trough continues to swing through the Tennessee and Ohio Valleys through mid afternoon. Later today and tonight weak upper level ridging builds in from the southwest. MVFR cigs likely to prevail this morning with vcsh at all sites as a weak wave of low pressure moves across the area.
1220 PM CST Wed Dec 8 2021 (Today and tonight) A warming trend will begin today, as southerly winds bring milder (warmer) air back into north Texas and Oklahoma. A mid/upper-level wave will cross the central Plains, with an attendant surface cyclone, also centered over the central Plains.
Surface winds: variable 10 kt or less, becoming W to NW 10-20 kt this afternoon behind a cold front.
Winds should stay gusty through the night as the current lee trough pushes eastward across the Plains.
In addition, a warm front will be riding up over the area late night into Thursday, which will result in a notable amount of warming tomorrow, which will continue into the extended term.
Upper ridging to kick in over the weekend, resulting in continued dry conditions and a warming trend.
A ridge axis that was south of the area is lifting north across the island chain. This is helping to draw in higher dew points, which is making things feel a tad warmer and a little muggy. Visible satellite shows some fast moving cirrus moving along in the west-northwest flow in the highest levels. Said aforementioned ridge will dominate the weather pattern for today and tonight, keeping conditions dry and a little warmer. As the ridge axis lifts further north this evening, winds will back to the northeast and east for the overnight. A weak ridge of high pressure will straddle Florida this afternoon and tonight, resulting in mainly light to gentle breezes across the Florida Keys.
120 PM EST Wed Dec 8 2021 High pressure tonight and Thursday.
Some very light snow showers or flurries occurred in the last few hours across parts of the higher elevations of southwest Virginia and most likely across the higher elevations of the eastern Tennessee mountains above 4000 feet north of Interstate 40. Temperatures this morning were in the lower 30s in the colder locations but little if any accumulation likely occurred. For the rest of today skies will continue to clear as broad trough continues to swing through the Tennessee and Ohio Valleys through mid afternoon. Later today and tonight weak upper level ridging builds in from the southwest. Tonight mostly clear with high pressure and drier airmass.
1009 AM MST Wed Dec 8 2021 NE PAC upper trough will cycle in the period as the current trough pushes east in longer wave form, with a new round of troughing developing this weekend. Split flow impulse will push a cold front through the region tonight, with some light snow developing over NE WY and the northern Black Hills, any amounts will generally be an inch or less.
1255 PM EST Wed Dec 8 2021 A weak upper trough will swing off to the east this evening.
Will keep pops on the low side with perhaps up to 30 percent chances in the southwest part of the state. That would suggest more of a light rain or perhaps light freezing rain precipitation type.
230 PM PST Wed Dec 8 2021 A low pressure system moving in from the northwest will bring showers late tonight through Thursday.
522 PM CST Wed Dec 8 2021 (This evening through Thursday) Southerly winds will continue to increase over Wednesday afternoon into Thursday, continuing the advection of warmer air and some higher dewpoints into the region. Ahead of the upper level trough moving through the southwestern US and towards the central US, lee side cyclogenesis will begin occuring through eastern Colorado, and the tightening surface pressure gradients will result in an increase of winds through Oklahoma and western north Texas.
(This afternoon through Thursday night) We remain in zonal flow this afternoon as a weak ridge builds overhead. Areas along the Lower Trans Pecos and Eastern Permian Basin could see near record high temperatures, around 20 degrees above normal! These temperatures will depend drastically on cloud cover on Thursday, and if we manage to clear a bit by peak heating, Midland may reach the 80s (record high is 81F). While our eastern CWA will be watching the warmer temperatures, a tightening gradient over SE New Mexico will result in high winds at the Guadalupe Mountains.
657 PM EST Wed Dec 8 2021 Rain will be moving east of the region as an area of low pressure moves offshore. High pressure and drier air will be over the region tonight through Thursday with rain chances returning for Thursday night into the weekend.
/Issued 249 PM EST Wed Dec 8 2021/ The upper-level longwave trough axis has shifted east of the CWA this afternoon, placing north and central GA beneath northwesterly flow aloft as dry air and subsidence work in. Had to adjust the temperature forecast down several degrees this afternoon thanks to a persistent cloud deck and CAA behind a weak surface cold front. Lows tonight will fall to the lower 30s to mid-40s, with patchy fog possible across portions of central GA.
- Diminishing snow this evening An area of high pressure in IA builds east through the remainder of the evening and into MI tonight. - Period of light snow Thursday Warm air advection strengthens on Thursday as a weakening wave of low pressure moves in from the west. The low levels will initially be dry when the DGZ moistens up and then by the time the low levels saturate. While surface temperatures are progged to rise a few degrees above freezing. if we lose the saturation at the DGZ when surface temperatures are below freezing. there could be a window for freezing drizzle which will need to be monitored.
253 PM MST Wed Dec 8 2021 The ridging today is breaking down as another weak wave comes through. Winds will continue to be on the gusty side through around 6 PM until the cold front can de-stabilize the atmosphere and disrupt the pressure gradient. Amounts generally still look fairly light with the highest amounts will likely be down into Sheridan County, and in the inch or 2 range. Thursday will be cooler with highs back into the 30s behind the front, and could still be on the breezy side.
832 PM EST Wed Dec 8 2021 The warming trend after todays light snow and cold will be interrupted by a weekend cold front. Wind should also back to the S-SW overnight as the high builds. The cold surge behind the trough will maintain below average temperature through tonight with overnight lows about 5 degrees below avg forecast. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
a warm front will lift north over the state on Thu morning. In addition, a warm front will be riding up over the area late night into Thursday, which will result in a notable amount of warming tomorrow, which will continue into the extended term.
529 PM EST Wed Dec 8 2021 The warming trend after todays light snow and cold will be interrupted by a weekend cold front. Snow should continue to end as the axis of an upper trough begins to shift east of the area. The cold surge behind the trough will maintain below average temperature through tonight with overnight lows about 5 degrees below avg forecast. Temperature will warm to near the calculated normals as warm advection ensues in advance of a wrn CONUS trough.
239 PM MST Wed Dec 8 2021 Satellite imagery this aftn depicts broad troughing over the wrn CONUS, with a trof axis and westerly jet streak approaching the cntrl Rockies. In advance of the trof, an area of enhanced mid-to- upper-level moisture is evident across the High Plains from wrn TX nwd into ern MT. Cold front (evident on satellite imagery over srn AB this hour) will cross the northern Plains tonight.
556 PM MST Wed Dec 8 2021 The High Wind Warning for northern Sweet Grass County and the Wind Advisory for the Livingston area and Beartooth Foothills will expire at 6 PM MST this evening. Winds could still gust to 50 mph early this evening in these areas behind a cold front moving through the area. RMS The ridging today is breaking down as another weak wave comes through. Winds will continue to be on the gusty side through around 6 PM until the cold front can de-stabilize the atmosphere and disrupt the pressure gradient. Amounts generally still look fairly light with the highest amounts will likely be down into Sheridan County, and in the inch or 2 range. Thursday will be cooler with highs back into the 30s behind the front, and could still be on the breezy side.
Behind this wave, a surface cold front will slide east through the area which should help mix temperatures out into the upper 40s to mid 50s early Thursday afternoon before cold-air advection moves in.
Will keep an eye on precipitation type, but given how warm it was in the west today it should be a while before temperatures drop below freezing. Some of the short range models are depicting some light precipitation behind the cold front late tonight over western ND. Will keep pops on the low side with perhaps up to 30 percent chances in the southwest part of the state. That would suggest more of a light rain or perhaps light freezing rain precipitation type.
758 PM EST Wed Dec 8 2021 A weak upper trough will swing off to the east this evening.
High pressure at the surface will continue to bring tranquil weather conditions overnight with clear skies and low temperatures in the mid 20's to mid 30's. VFR flight conditions will prevail over the next 24 hours with high pressure in place. Diegan Chattanooga Airport, TN 34 58 49 69 62 / 0 0 60 60 80 Knoxville McGhee Tyson Airport, TN 30 57 45 66 59 / 0 0 40 60 50 Oak Ridge, TN 30 55 45 65 58 / 0 0 40 60 80 Tri Cities Airport, TN 27 54 37 62 53 / 0 0 20 60 50.
625 PM EST Wed Dec 8 2021 High pressure tonight and Thursday.
358 PM MST Wed Dec 8 2021 Currently seeing strong wind across portions of the Wind Corridor as a trough approaches and the surface pressure gradient remains tightened. A cold front will move south into the area tonight, with light snow likely across northern Wyoming through Thursday morning.
A deep trough of low pressure over western Canada is pushing a cold front over the Northern Rockies this afternoon. Thursday will bring continued snow to the higher elevations under a much cooler airmass along with moist, westerly flow.
438 PM MST Wed Dec 8 2021 Satellite imagery this aftn depicts broad troughing over the wrn CONUS, with a trof axis and westerly jet streak approaching the cntrl Rockies. In advance of the trof, an area of enhanced mid-to- upper-level moisture is evident across the High Plains from wrn TX nwd into ern MT. Cold front (evident on satellite imagery over srn AB this hour) will cross the northern Plains tonight.
This is primarily due to all the low level moisture.