Aikyam-Lab/Synoptic-Bench huggingface dataset:
while an upper level low pressure slowly sagged into the Desert Southwest. Conditions overnight are not expected to change all that much with the high clouds and easterly surface winds holding over the CWA. low temps tonight are anticipated to be warmer than this mornings lows.
Dry with near seasonal temperatures as high pressure remains across the Tennessee Valley and Southern Appalachians. Discussion: Upper troughing will amplify across the Rockies with upper heights increasing in response across the Southeast CONUS. Low-level 850mb heights will increase with temperatures warming up about 3 to 5 degrees warmer than on Tuesday afternoon.
102 AM EST Wed Dec 13 2023 Dry conditions will continue this week and into the weekend, with warmer temperatures in place by the end of the week. The only real impact for this period will be a slight veering of surface winds to the northwest and limited efficient radiational cooling potential as the lower levels stay mixed. Overnight lows will be the coldest of the week with the high centered closer to the region, allowing for stronger radiational cooling with light wind and clear skies. Upper ridging transitioning across the region will be the dominant feature the remainder of the work week and into the weekend, bringing a warming trend in temperatures and maintaining dry conditions.
923 PM PST Tue Dec 12 2023 Stratus and fog will be a persistent feature in the forecast with high pressure over the region.
Should be a few degrees cooler Thursday with highs in the 40s north, 50s central, and 60s south with some 70s along the Rio Grande.
Upper ridge moves through the area today with warmer temperatures which will be in the 40s in most areas.
623 AM EST Wed Dec 13 2023 A cold front will cross the region this morning.
In the midst of this pattern, an upper level low will move south or southeast across the Upper Midwest into the Midwest or Ohio Valley region this weekend.
Upper level ridging has start to build in through the upper Rockies from the west as increasing convergence continues to develop and expand eastward. With upper level ridging in place and weak flow aloft, expect dry conditions and mainly clear skies for Wednesday and through the remainder of the work week and into the weekend. A series of upper level lows will push south out of the Gulf of Alaska by week's end and over the weekend with the latter half seeing one push near the northern Californian coast.
An upper level low will remain over the Desert Southwest today, then move slowly east into New Mexico by tomorrow. Rainfall amounts will be light, with the possibility of heavier rainfall holding off until Thursday night, when the upper low tracks east into the Texas High Plains. Skies will remain cloudy through tonight, with highs today mainly in the mid 50s, and lows tonight in the low to mid 40s.
Winds over the higher terrain will be somewhat breezy. Afternoon high temperatures will be relatively modest, and overnight low temperatures will be chilly, but a couple degrees warmer than the lows from this morning across the board.
346 AM MST Wed Dec 13 2023 High pressure at the surface and aloft will maintain dry conditions with milder than averages temperatures through the upcoming weekend. An upper level ridge with axis extending from the Pacific NW into Western Canada slumps to the east and south today while a weak upper low drifts east across the SW US, leaving the Northern Rockies and MT under a relatively light flow aloft through Thursday. At the surface, thermally driven high pressure is in place across the Rockies including SW MT, while lower pressure exists across the plains.
538 AM CST Wed Dec 13 2023 (Today through Thursday) An upper level low moves over Arizona today to over New Mexico on Thursday with a moist southwesterly flow aloft from off the Pacific.
This ridge will remain nearly stationary to our northeast while troughing, approaching from the Intermountain West, will act to maintain fairly robust easterly winds and elevated cloud cover. At the surface, high pressure across the eastern CONUS to support east winds with low temperatures in the low to mid 40s.
310 AM MST Wed Dec 13 2023 Cooler temperatures today and tomorrow as a low pressure system moves through the area.
602 AM EST Wed Dec 13 2023 High pressure centered over Iowa and Illinois will expand across the Ohio Valley today. Large upper level low centered over/near James Bay this morning, with the positive tilted trough axis extension swinging through the Central Great Lakes today. With the mid clouds exiting, coupled with the dry airmass, low temperatures in the lower 20s seems appropriate tonight, but increasing warm advection/pressure gradient likely prevents temps from cratering much more. The end of the work week will feature the upper level ridge over Western Canada folding over and building east of the Mississippi River.
538 AM CST Wed Dec 13 2023 - A mix of rain and light freezing rain moves in from the southwest tonight into Thursday morning. - After warming above freezing, rain very slowly spreads northward on Thursday.
436 AM EST Wed Dec 13 2023 Dry conditions will continue this week and into the weekend, with warmer temperatures in place by the end of the week. The only real impact for this period will be a slight veering of surface winds to the northwest and limited efficient radiational cooling potential as the lower levels stay mixed. Overnight lows will be the coldest of the week with the high centered closer to the region, allowing for stronger radiational cooling with light wind and clear skies. Upper ridging transitioning across the region will be the dominant feature the remainder of the work week and into the weekend, bringing a warming trend in temperatures and maintaining dry conditions.
644 AM EST Wed Dec 13 2023 Dry high pressure will remain in place through late week with below normal temperatures expected each day. High pressure will be moving toward the central Atlantic States from the western Great Lakes today and be centered north of the area tonight. This will yield overnight lows ranging from the low 30s north to the upper 30s in the SE Midlands and southern CSRA.
Satellite imagery early this morning is showing a somewhat distorted ridge of high pressure over the Northern Rockies. This positively tilted ridge is wrapped around a closed low over the southwestern U. A second closed low is spinning over the southern coast of Alaska, sending Pacific moisture into western Canada. The interestingly oriented ridge over the Northern Rockies is creating a dry slot, deflecting Pacific moisture to the north. As the week progresses, the ridge will become less positively tilted as the southwestern low moves east and the Alaskan low amplifies to the south. This system in not packing much of a punch, but will bring chances for light snow to the Continental Divide in Glacier Park as well as the higher terrain of northwest Montana including the Cabinet, Whitefish, Flathead, Swan, and Mission Ranges.
Upper trough continues to move southeast of the region toward the Desert Southwest. Skies are clear across most of the region early this morning, but high clouds are spilling through the approaching ridge into far northern California. Otherwise, dry weather with mild days and cool nights will persist through the remainder of the week as the next upstream trough closes off well to the west allowing for ridging to remain over NorCal.
958 AM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
528 AM CST Wed Dec 13 2023 (Today through Thursday) High pressure remains across much of the region. Low temperatures this morning low 30s for most of the area, though the cooler valley locations in the northeast will drop into the upper 20s. By Thursday morning, lows will be in the upper 30s to near 40 with the cooler valleys dropping into the low 30s.
The combination of a few passing disturbances and moisture pooling ahead of the next mid to upper level low will maintain chance PoPs in the forecast today (30-60%). By later in the afternoon however, PoPs will transition to the southwest and gradually diminish through the overnight period as the low level flow briefly becomes more northeastward. 5" through the period, with the highest accumulations expected today. Overnight lows will be above normal and in the low 50s to mid 60s.
551 AM CST Wed Dec 13 2023 - A light wintry mix of freezing rain/freezing drizzle is possible tonight across southwestern Nebraska.
A moisture starved low pressure system will slowly cross the Desert Southwest through Thursday, maintaining generally cool and dry conditions across Utah and southwest Wyoming. High pressure will build across the region late this week through the upcoming weekend, resulting in continued dry conditions but strengthening valley inversions.
High temperatures will mostly be in the lower to middle 40s with a few upper 40s south of I-70. Mostly clear skies and very light winds beneath a ridge of high pressure will lead to frosty lows in the middle 20s tonight. Once the high shifts eastward and a light southerly return flow commences, temps will begin to warm on Thursday.
Cooler temperatures today and tomorrow as a low pressure system moves through the area.
514 AM CST Wed Dec 13 2023 Key Messages: * None High pressure over the region this morning will gradually move east over the next 36 hours allowing southerly winds to develop and milder air to spread into the area.
With upper ridge building in, fog and stratus are the concerns for the next couple days. Opted for another Freezing Fog Advisory to capture the shifting nature of the dense fog. Should see some erosion of the low level moisture late morning, though some stratus could linger through the day.
705 AM EST Wed Dec 13 2023 Marine - Mild Weather will continue through the work week A strong upper level low will be moving through eastern Canada. While there will be a deepening upper level trough moving through the region with a strong gradient all instability will be aloft. Expect dry air and high pressure towards the surface. High pressure through the mid to low levels will stifle any clouds resulting in a mix of sun and clouds with a dry forecast.
Low temperatures are forecast to be in the lower to middle 20s. the moisture rich airmass continues slowly moving north, encompassing the entire area during the day and through the night, steered north ahead of an upper level low pressure area south of the four corners area and upper ridge axis extending from the gulf into the forecast area. If the cooler NAM model verifies, surface temperatures across the area would be a few degrees lower than currently advertised. as the upper low slowly moves east into New Mexico during the day, we'll continue to have rather high pops for rain or a rain/snow mixing the morning before some drier air moves in from the northwest, sliding the higher pops across the southeast 1/2 of the area in the afternoon.
Dry with near seasonal temperatures as high pressure remains across the Tennessee Valley and Southern Appalachians. Discussion: Upper troughing will amplify across the Rockies with upper heights increasing in response across the Southeast CONUS.
501 AM CST Wed Dec 13 2023 - Mild temperatures today/Thu, but cooler over the snow pack - Fog potential is always there with warm daytime temperatures and melting snow.
A strong low pressure system will churn through the Four Corners region today and Thursday, bringing a swath of precipitation east of the Rockies. Meanwhile, a ridge will begin to amplify over the Missouri Valley, maintaining dry weather and above normal temperatures across our forecast area.
Satellite imagery early this morning is showing a somewhat distorted ridge of high pressure over the Northern Rockies. This positively tilted ridge is wrapped around a closed low over the southwestern U. A second closed low is spinning over the southern coast of Alaska, sending Pacific moisture into western Canada. The interestingly oriented ridge over the Northern Rockies is creating a dry slot, deflecting Pacific moisture to the north. As the week progresses, the ridge will become less positively tilted as the southwestern low moves east and the Alaskan low amplifies to the south. This system is not packing much of a punch, but will bring chances for light snow to the Continental Divide in Glacier Park as well as the higher terrain of northwest Montana including the Cabinet, Whitefish, Flathead, Swan, and Mission Ranges.
510 AM CST Wed Dec 13 2023 - High pressure will keep dry weather over the Quad State through the remainder of the workweek, with only a chance of showers returning this weekend. Through the remainder of the workweek, high pressure will slowly drift across the Midwest.
659 AM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
High pressure will continue to dominate the weather with only some minor high clouds present at times. Dry with near seasonal temperatures as high pressure remains across the Tennessee Valley and Southern Appalachians. Discussion: Upper troughing will amplify across the Rockies with upper heights increasing in response across the Southeast CONUS.
355 AM CST Wed Dec 13 2023 - A mix of rain and light freezing rain moves in from the southwest tonight into Thursday morning. - After warming above freezing, rain very slowly spreads northward on Thursday.
914 AM EST Wed Dec 13 2023 A large area of high pressure will remain in control over the region for the rest of the week.
Sfc ridging to the northeast will provide persistent erly flow across the state. Aloft, H500 ridging to the southeast will keep swrly flow in place over the region. To the west, an H500 cyclone will be approaching from the Four Corners, across the TX panhandle.
445 AM MST Wed Dec 13 2023 Updated Aviation Discussion High pressure at the surface and aloft will maintain dry conditions with milder than averages temperatures through the upcoming weekend. An upper level ridge with axis extending from the Pacific NW into Western Canada slumps to the east and south today while a weak upper low drifts east across the SW US, leaving the Northern Rockies and MT under a relatively light flow aloft through Thursday. At the surface, thermally driven high pressure is in place across the Rockies including SW MT, while lower pressure exists across the plains.
325 AM CST Wed Dec 13 2023 - A light wintry mix of freezing rain/freezing drizzle is possible tonight across southwestern Nebraska.
(Rest of Today) Dry weather will continue today into this evening as high pressure remains in place over the OH River Valley-- bringing northeasterly flow to our area.
442 AM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
529 AM CST Wed Dec 13 2023 (Today) Dry weather will continue today as high pressure remains anchored just to our north. Will see a steady flow of high clouds streaming in along an upper ridge located to our southwest while winds near the sfc remain light and northeasterly.
Gusty easterly Sierra crest ridge-top winds continue through this morning into early afternoon.
720 AM EST Wed Dec 13 2023 Dry conditions will continue this week and into the weekend, with warmer temperatures in place by the end of the week. Overnight lows will be the coldest of the week with the high centered closer to the region, allowing for stronger radiational cooling with light wind and clear skies. Upper ridging transitioning across the region will be the dominant feature the remainder of the work week and into the weekend, bringing a warming trend in temperatures and maintaining dry conditions.
230 AM PST Wed Dec 13 2023 Sub-freezing temperatures will continue to effect the rural areas of the San Joaquin Valley through this morning with low temperatures dropping to low as 28 degrees.
602 AM EST Wed Dec 13 2023 Aviation - Mild Weather will continue through the work week A strong upper level low will be moving through eastern Canada. While there will be a deepening upper level trough moving through the region with a strong gradient all instability will be aloft. Expect dry air and high pressure towards the surface. High pressure through the mid to low levels will stifle any clouds resulting in a mix of sun and clouds with a dry forecast.
659 AM EST Wed Dec 13 2023 A large area of high pressure will remain in control over the region for the rest of the week.
(Today through Thursday) By and large, aside from temperatures just a few degrees warmer than yesterday (thanks to airmass moderation under clear and dry conditions), negligible changes are expected to our sensible weather for Wednesday. Highs look to top out in the upper-50s to lower-60s, just a few degrees warmer than normals for early December. That said, quasi-zonal flow at the mid-levels will be replaced with northwest flow under a low amplitude ridge over the next 24 hours. Highs tomorrow will thus be just a bit cooler -- primarily for areas along and north of the I-20 corridor and east of the Metro -- in the lower- to-mid 50s.
608 AM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
(Tomorrow through Wednesday) Thursday will be very similar to today, with afternoon high temperatures perhaps a degree or two warmer.
1209 PM EST Wed Dec 13 2023 A large area of high pressure will remain in control over the region for the rest of the week.
- A mix of rain and light freezing rain moves in from the southwest tonight into Thursday morning. - After warming above freezing, rain very slowly spreads northward on Thursday.
Closer to home, isentropic upglide has begun in earnest in moderate return flow, making for a cold, wet, dreary day across the lowlands. Thursday, the upper trough crosses into New Mexico, and although the LLJ will weaken, it'll persist as it shifts north into the Permian Basin, maintaining strong isentropic upglide. Thursday night, the upper trough crosses into the Panhandles/Southern Plains, with a weak cold front trailing behind. W/the windshift behind the trough, NBM lows look reasonable.
Area obs across much of the western zones are around 3-5 deg F cooler than this time yesterday. This ridge will remain nearly stationary to our northeast while troughing, approaching from the Intermountain West, will act to maintain fairly robust easterly winds and elevated cloud cover. At the surface, high pressure across the eastern CONUS to support east winds with low temperatures in the low to mid 40s.
The high pressure ridge to our northeast will strengthen further overnight tonight through the day on Thursday. Upper level ridging during the day on Thursday will help temperatures modify even more into the low and mid 60s.
1043 AM MST Wed Dec 13 2023 High pressure at the surface and aloft will maintain dry conditions with milder than averages temperatures through the upcoming weekend. Areas of patchy fog continue; however, visibility of less than, or equal to, one quarter mile in dense freezing has ended. /ISSUED 905 AM MST Wed Dec 13 2023/ An upper level ridge with axis extending from the Pacific NW into Western Canada slumps to the east and south today while a weak upper low drifts east across the SW US, leaving the Northern Rockies and MT under a relatively light flow aloft through Thursday. At the surface, thermally driven high pressure is in place across the Rockies including SW MT, while lower pressure exists across the plains.
1237 PM EST Wed Dec 13 2023 VFR conditions will carry through the day and overnight as a large area of high pressure drifts slowly eastward over the Ohio Valley. There does continue to be a chance to see some clouds around 5kft tonight for a couple hours as an elevated warm front passes over so will leave the tempo in for now. Large upper level low centered over/near James Bay this morning, with the positive tilted trough axis extension swinging through the Central Great Lakes today. With the mid clouds exiting, coupled with the dry airmass, low temperatures in the lower 20s seems appropriate tonight, but increasing warm advection/pressure gradient likely prevents temps from cratering much more. The end of the work week will feature the upper level ridge over Western Canada folding over and building east of the Mississippi River.
Winds will remain breezy and gusty for the next couple of days as the pressure gradient continues to tighten with an area of low pressure developing in the Gulf.
1232 PM EST Wed Dec 13 2023 A cold front will cross the region this morning.
Nearly zonal flow today will shift as low amplitude ridge becomes the prominate feature.
905 AM MST Wed Dec 13 2023 High pressure at the surface and aloft will maintain dry conditions with milder than averages temperatures through the upcoming weekend. - Fogleman An upper level ridge with axis extending from the Pacific NW into Western Canada slumps to the east and south today while a weak upper low drifts east across the SW US, leaving the Northern Rockies and MT under a relatively light flow aloft through Thursday. At the surface, thermally driven high pressure is in place across the Rockies including SW MT, while lower pressure exists across the plains.
With this influence, opted to tend toward the higher end of the probabilistic distribution for temperatures today and lower end of dew point. Thursday and Thursday night will be defined by continued upper subsidence over low level warm advection with a building ridge. Upper ridging transitioning across the region will be the dominant feature the remainder of the work week and into the weekend, bringing a warming trend in temperatures and maintaining dry conditions.
Rain chances will continue for generally the same areas tonight through much of the day tomorrow as the trough across the southwest US makes slow progress eastward.
1113 AM CST Wed Dec 13 2023 Key Messages: * None High pressure over the region this morning will gradually move east over the next 36 hours allowing southerly winds to develop and milder air to spread into the area.
An upper ridge in place over Montana today has provided for plenty of sunshine and near record high temperatures. A dry/weak cold front will move east across the area Thursday afternoon that should cool the area off some, but temps will still be well above normal.
(This evening through Thursday Night) Upper ridge aloft this afternoon will continue to slide east through the period, giving way to the gradual influence of the upper trough present across the SW CONUS.
High pressure builds into the region on Thursday and will persist through the weekend, resulting in a prolonged period of dry weather and warmer temperatures. Coverage of snow showers will be diminishing by late tonight as high pressure begins to move in. High pressure moves into the region on Thursday, which will result in mostly sunny skies and seasonable temperatures. Mostly clear skies and seasonable temperatures are expected Thursday night with high pressure remaining in control. High pressure will dominate through the short term forecast period.
301 PM EST Wed Dec 13 2023 A large area of high pressure over the Midwest will build slowly east toward the Central Appalachians by the week's end, supplying a string of fair and dry weather.
High pressure is now strongly in control. An upper level trough that is so shallow it will not have any surface feature, will pass through Thu night.
With this influence, opted to tend toward the higher end of the probabilistic distribution for temperatures today and lower end of dew point. Thursday and Thursday night will be defined by continued upper subsidence over low level warm advection with a building ridge.
945 AM CST Wed Dec 13 2023 - Mild temperatures today/Thu, but cooler over the snow pack - Fog potential is always there with warm daytime temperatures and melting snow.