Aikyam-Lab/Synoptic-Bench huggingface dataset:
Meanwhile, a warm front current entering the western Dakotas, will march east bringing a north-south swath of low level warming/isentropic upglide with it. While snow will be the main pcpn type, the low level warming could result in partial melting/full before pcpn shifts east. Latest EC and GFS would keep this snow band to the north with some potential for rain/mix along/ahead of accompanying cold front. WPC cluster analysis generally favors ridge building to the west (to varying degrees) with northwest flow/troughing across the region. Meanwhile, a portion of the GFS suggests that the strong upper level ridging would build across the region - a milder/dry solution.
314 PM MST Sun Nov 28 2021 Quiet and dry weather will continue today and tomorrow as high pressure continues to influence the area. Today's highs will be in the mid-60s over the plains, rising into the low-70s tomorrow, while the valleys will stay in the mid-high 50s both days.
The persistent ridge of high pressure will remain situated to our west with its center over the Great Basin before the center begins to drift southeast overnight. This will result in continued northwest flow aloft along with seasonably warm temperatures tonight as overnight lows trend 4 to 8 degrees above normal in the lower valleys and by 10 to 20 degrees above average in the mountains.
414 PM MST Sun Nov 28 2021 The persistent western CONUS upper ridge will keep the weather over the forecast area mild, breezy and dry tonight and on Monday.
522 PM CST Sun Nov 28 2021 (This evening through Monday) Early this afternoon, mostly clear skies are occurring across West Central Texas with temperatures near seasonal normals, in the low to mid 60s. A few low lying areas and river valleys could drop into the lower 30s.
206 PM MST Sun Nov 28 2021 Warmer than average temperatures and dry conditions persist through the short term period. The axis of the upper ridge over the High Plains today moves eastward over the Plains states on Monday as the upper flow flattens in response to the short wave trough moving into the Pacific Northwest.
613 PM CST Sun Nov 28 2021 Fair weather continues across the High Plains to close out the weekend with warm temperatures and some mid/high clouds overhead. With temperatures aloft above the 90th percentile and continued dry conditions, expect a large diurnal temperature spread with lows tonight ranging from around the freezing mark for southwest Nebraska to around 40 degrees near the Niobrara valley. Things change a bit Monday night as the upper ridge loses some amplitude and high pressure to our north pushes a weak cold front in our direction.
The system will exit the area early Monday with high pressure building over the Florida peninsula in the wake of the disturbance.
This high will provide a dry forecast for tonight and clear to mostly clear skies through late this evening. However, it's still looking like an inch or less south of Highway 29, and 1 to 3 inches north of Highway 29 with the highest amounts towards the Upper MI border in far northeast WI. As the snow nears it's end in central WI, forecast soundings indicate a warm-layer in the lower levels for a few hours, which may present the possibility for freezing rain. To the north, forecast soundings show a loss of ice aloft as the snow comes to an end, causing freezing drizzle to mix in with the snow.
555 PM EST Sun Nov 28 2021 A cold front will move through the region tonight. High pressure will then build back in on Monday and prevail into late week. Cloudy skies this evening will give way to clearing conditions after midnight as the southern axis of the mean H5 trough finally pushes east and offshore. A cold front will drop through the area overnight helping to usher in another push of cooler/drier air. High pressure will build into the region from the west through the period while zonal flow prevails aloft.
644 PM EST Sun Nov 28 2021 High pressure will build into the region tonight through Monday, leading to mainly dry conditions. Lows tonight will be in the low to mid 20s. This will allow for the lower level flow to back around the west through Monday afternoon with WAA developing. Highs on Monday will be in the upper 30s to lower 40s with lows Monday night in the low to mid 30s.
NNW winds will continue overnight as temps bottom out in the low to mid 20s.
501 PM CST Sun Nov 28 2021 The cold front responsible for today's cooler temperatures has pushed well to the SE of the region. High pressure is building in the wake of the front beneath the influence of rising heights and upper ridging. BSH A diffuse cold front trailing to the SW of the above clipper will push into the region on Monday night, stalling somewhere in the vicinity of the MO/AR border.
As for today, a dry cold front moved through the area yesterday, so temperatures were slightly cooler yesterday. This will result in chilly low temperatures near or below freezing across the area Lows will be in the 20s area wide.
Cold northwest flow on the backside of a trough digging across the Great Lakes region will continue to bring convective snow showers to the Upper Ohio Valley and Allegheny Mountains. 850mb flow at -6C with surface temperatures hovering around or even above the freezing mark has resulted in rather steep lapse rates through the boundary layer and above to 700mb where temps have cooled to near -16C. Ensemble guidances indicates snow accumulation of 2-3 inches is likely for the I-80 corridor with lesser amounts farther south with the exception of the ridges. Chestnut and Laurel ridges southward to the higher terrain of West Virginia will receive upsloping flow through much of the night, with the highest rates / most likely timeframe being from approximately midnight to 8am. resulting in perhaps a brief period of snizzle or freezing drizzle before precip ends altogether.
A cold front continues to move southeast into central/southern Alabama at this time. The core of the high pressure will move across the area on Monday into Georgia by Monday evening. Plenty of sunshine is expected, but temperatures will be a bit cooler again only climbing into the upper 40s to mid 50s in most areas.
/issued 101 PM CST Sun Nov 28 2021/ Fair weather to continue through Monday as modest upper level ridging moves overhead. Surface ridging across the Rolling Plains early this afternoon will shift to the east of the forecast area this evening with southwesterly surface/low level flow spreading across the forecast area in its wake.
This high slowly moves out of the area through the evening and overnight. Tomorrow morning low level flow orients more westerly which helps push this channel of warmer air over far E KS and W MO.
608 PM EST Sun Nov 28 2021 A dry cold front will push through the area tonight. Latest analysis shows low pressure over the Great Lakes region with attendant cold front pushing through the Appalachians. High pressure will dominant the weather through the period with dry weather expected and eventually warmer weather. High pressure in control of our weather early in the week will remain in control through mid week, while drifting off the coast.
High pressure dominates the next several days for above normal temperatures.
848 PM CST Sun Nov 28 2021 Winds are quickly diminishing behind a cold front that passed through earlier today. As for today, a dry cold front moved through the area yesterday, so temperatures were slightly cooler yesterday. This will result in chilly low temperatures near or below freezing across the area Lows will be in the 20s area wide.
H5 flow remains out of the northwest with much of the CWA situated downstream of a rather amplified ridge across the western CONUS. For Monday, warmer temperatures return to the area, with highs in the low 30s near Lake of the Woods, and in the 40s to the south of Valley City. As warmer air works in aloft, we would see, depending on depth of the warmer air, a wintry mix of FZRA/IP for a time into early Wed morning.
237 PM MST Sun Nov 28 2021 Cloud cover has had an impact on temperatures today, but many locations have reached the low-mid 60s. Surface analysis shows lee side troffing with the latest IDA-LWT gradient at 16mb. Livingston's wind gusts have decreased significantly since the high gusts this morning, as expected with the daytime mixing, but we expect an increase this evening as air mass begins to stabilize. Monday will again be quite mild but a bit cooler than today. Pacific trof will lower heights and bring a quick shot of light rain showers (from NW to SE) Monday afternoon and night.
Further south across Benson and Ramsey counties, temps are above freezing and there is not any impact. H5 flow remains out of the northwest with much of the CWA situated downstream of a rather amplified ridge across the western CONUS. For Monday, warmer temperatures return to the area, with highs in the low 30s near Lake of the Woods, and in the 40s to the south of Valley City. As warmer air works in aloft, we would see, depending on depth of the warmer air, a wintry mix of FZRA/IP for a time into early Wed morning.
855 PM EST Sun Nov 28 2021 A cold front will move through the region tonight. High pressure will then build back in on Monday and prevail into late week. The cold front is still to the north and northwest per 29/01z surface analysis, but will move steadily south through the area overnight. Cloudy skies this evening will give way to clearing conditions over the next several hours as the southern axis of the mean H5 trough finally pushes east and offshore. High pressure will build into the region from the west through the period while zonal flow prevails aloft.
130 PM PST Sun Nov 28 2021 Dry weather and warmer than average temperatures will continue through-out week. For now, the introduction of slightly drier air will keep the district cold overnight, but, will also allow for slightly warmer afternoon temperatures as well. Not much change is expected in the forecast as varying degrees of a persistent blocking high pattern exist over the West Coast through the first week of December. Central California is right in the middle of a Blocking High Pattern with dry weather expected for the next seven days. Ensemble model solution all show varying degrees of the basic âRidge over the Westâ for the next seven days. Cluster Analysis re-enforcing the idea of a strong blocking ridge as consensus among the different panels for the 3 to 7 day period is very high.
Winds will switch to the SW on Monday, with some gusts between 10 and 20 knots possible across the higher elevations of Nrn AR during the afternoon hours.
Very dry conditions with well above normal temperatures will persist through the work week, with minor day to day changes as high pressure dominates.
High pressure will continue for the foreseeable future with above average temperatures and dry conditions statewide.
A Rex blocking pattern sets up overnight across the western U. Overall, Monday will be another quiet day, although afternoon highs will be around 5 to 10 degrees warmer than today's.
The highlights with this update are above average temperatures and a continued dry stretch of weather. This cooler, more normal weather will not stick around as an impressive warm up is in store for tomorrow. Given the WAA pattern and PBL mixing, I went near the 75th percentile of guidance for temps tomorrow afternoon, which is very comparable to the previous forecast, if not just a degree warmer in some spots.
characterized by deep ridging over the western CONUS, deep troughing over the eastern CONUS, and NW flow aloft over the central CONUS.
A broad area of high pressure centered over California and the Great Basin will steer the Polar jet stream through British Columbia and Alberta.
338 PM MST Sun Nov 28 2021 The H5 ridge remains dominant across the Rockies, keeping temperatures well above normal for the region. A large upper level high centered off the CA coast is continuing the northwest flow across the forecast area.
923 PM EST Sun Nov 28 2021 With light winds, dew points in the teens and lower 20s and only a few patches of mid and high clouds per IR loop, temperatures will easily be able to bottom out in the lower and middle 20s overnight. Northwest flow will continue aloft tonight while high pressure moves across the area from west to east. Winds will diminish as the high moves across. With clear to partly cloudy skies and light winds expected, temperatures will dip into the lower to middle 20s tonight. Highs on Monday should be in the lower to middle 40s most areas. Although there will be moisture and lift in the mid levels on Monday, the lower atmosphere will be dry.
1243 AM EST Mon Nov 29 2021 A cold front will move through the region tonight. High pressure will then build back in on Monday and prevail into late week. Satellite imagery shows that most of the forecast area has cleared out while the cold front will begin moving into the inland zones soon. No changes to lows which still range from the mid to upper 30s inland to the low 40s right along the coast. High pressure will build into the region from the west through the period while zonal flow prevails aloft.
It will be sunny and warmer, in the lower to mid 70s, with a dry atmosphere in place.
The main trough axis will move through New England late this morning, allowing for minor height rises over our neck of the woods. Snow showers will exit the ridges late Tuesday morning and weak warm air advection will slowly ensue behind the exiting wave.
Downsloping effect will also help pull warmer air into the area with H85 temperatures pushing up around to just above 15C today. The next dry cold front is scheduled to slide through SW KS Tuesday morning, with breezy northeast winds. Modest cool advection will trim afternoon temperatures to the lower to mid 60s, coolest near Hays and warmest near Oklahoma.
244 AM EST Mon Nov 29 2021 Weak ridge of high pressure moving across the area with calm to light winds allowing temps to tumble into lower and mid 20s under mostly clear skies. Ridge will move across the area today as another fast moving clipper type system approaches the upper great lakes which will help pull a warm front through central Indiana later this afternoon and evening. Core of colder air that briefly settled into central Indiana will be displaced today as warm advection gets underway as low level ridge axis slides east.
The high cloud cover will limit some radiational cooling effects, especially across the southern South Plains and Rolling Plains. Some locations in our northern zones may ultimately drop below freezing by early Tuesday morning. As the upper trough that pushed the front into the area continues to move east across the Midwest and dig into the eastern CONUS, an upper ridge will begin to build over our region between the aforementioned trough and a cutoff low hanging out over the SW coast.
1019 PM MST Sun Nov 28 2021 The H5 ridge remains dominant across the Rockies, keeping temperatures well above normal for the region. A large upper level high centered off the CA coast is continuing the northwest flow across the forecast area.
Forecast soundings continue to show a considerable dry layer in the lower levels, thus, any rainfall tonight will likely not be enough to measure, hence the mention of sprinkles through daybreak. Overnight lows will mostly be in the mid to upper 40s, with urban and coastal areas in the lower 50s.
With an upper low over Lake Huron, cyclonic northwesterly flow over the still warm Lake Michigan and inversion heights around 7000 ft has lead to the development of light lake effect snow showers this afternoon. Expect showers to taper off later this evening as the low progresses quickly eastward. Somewhat zonal flow will then be over the region on Tuesday with dry and slightly warmer weather.
(Today and tonight) Today will feature a fairly significant warmup compared to yesterday as westerly winds at 850 mb advect in much warmer air, with 850 mb temperatures increasing by nearly 10C compared to yesterday.
Rather interesting scenario ongoing tonight with the approaching cold front. Behind this band of clouds, a secondary cold front is progressing across Mississippi. Lows tomorrow will be mainly radiational driven as temperatures drop into the low to mid 30s.
939 PM MST Sun Nov 28 2021 The persistent western CONUS upper ridge will keep the weather over the forecast area mild, breezy and dry tonight and on Monday.
Drier air moves in this evening and tonight with a ridge passing across the region, however any lull in precipitation will be brief, as as another short wave pushes into western NY by early Tuesday morning. This next system will be lacking moisture, but there will be some weak isentropic lift out ahead of an approaching warm front Tuesday morning and some scattered snow showers are expected.
VFR conditions continue at all sites through the period with high pressure and light winds at the surface. Discussion: An upper trough across the eastern Great Lakes will pull a frontal boundary across the area early this evening. Due to an upper trough across the northern Gulf, no return flow of moisture into this system. For Tonight, upper clouds will move east of the area with surface ridging building into the southern Appalachians. For Monday, surface ridging and very dry airmass will be rule across the southern Appalachians and Tennessee valley.
There is still the potential for some patchy freezing fog to develop before sunrise Monday morning, but this should be limited to places very near to bodies of water.
Near the surface, a low pressure trough axis is edging east through central Kansas. Most locations will remain above freezing in the 30s through sunrise Monday. The next dry cold front is scheduled to slide through SW KS Tuesday morning, with breezy northeast winds. Modest cool advection will trim afternoon temperatures to the lower to mid 60s, coolest near Hays and warmest near Oklahoma.
A few low lying and wind sheltered spots in the Hill Country will flirt with freezing around sunrise. A weak mid level impulse spins off an upper level low centered just west of Baja California tonight and moves over our area on Tuesday.
253 AM CST Mon Nov 29 2021 Tranquil conditions across the Tennessee Valley region this morning with high pressure firmly in control of the weather. As a result, daytime highs will only peak in the low to mid 50s despite the ample sunshine. The aforementioned northerly winds will make it feel 5-10 degrees lower than the actual air temperature, so definitely bundle up if you're heading outdoors today! As the center of the high shifts to the ESE, our winds will veer to a southerly direction by this evening and overnight hours. This will make for a milder night across the area as lows will run about 8-10 degrees warmer than last night.
/issued 848 PM CST Sun Nov 28 2021/ Winds are quickly diminishing behind a cold front that passed through earlier today. As for today, a dry cold front moved through the area yesterday, so temperatures were slightly cooler yesterday. This will result in chilly low temperatures near or below freezing across the area Lows will be in the 20s area wide. Expect temperatures to being to warm starting Tuesday as the ridge expands.
Downsloping effect will also help pull warmer air into the area with H85 temperatures pushing up around to just above 15C today. Cooler air will filter southward into western Kansas Tuesday in wake of a recent weak cold frontal passage, lowering H85 temperatures a little below 10C across much of the area.
336 AM EST Mon Nov 29 2021 Cool high pressure will settle over the region today. Expect a gradual warming trend to above normal daytime temperatures beginning Tuesday along with occasional afternoon breeziness as the high pressure shifts offshore. A cold front is crossing the region early this morning and should reach the coast by 12-14z with northerly winds spreading over the forecast area. Satellite imagery shows mainly clear skies but some higher clouds are expected to cross the region later this morning as the upper trough axis approaches.
349 AM EST Mon Nov 29 2021 Large trough axis over the eastern CONUS has shifted east of the area, with associated cold front draped over south Georgia. 31 The extended periods start out with mid to upper level dry NWLY flow as dry with high pressure ridge staying over the area through the end of the week. Will gradually see moisture return as surface ridging slides east Wed allowing for a slight southerly component to the wind with a slight increase in dewpoints through the week.
With light winds, dew points in the teens and lower 20s and only a few patches of mid and high clouds per IR loop, temperatures will easily be able to bottom out in the lower and middle 20s overnight. Northwest flow will continue aloft tonight while high pressure moves across the area from west to east. Winds will diminish as the high moves across. With clear to partly cloudy skies and light winds expected, temperatures will dip into the lower to middle 20s tonight. Highs on Monday should be in the lower to middle 40s most areas. Although there will be moisture and lift in the mid levels on Monday, the lower atmosphere will be dry.
845 PM PST Sun Nov 28 2021 The passage of a cold front will bring rain mainly to southeast Washington and the Idaho Panhandle on Monday along with some cooling.
956 PM CST Sun Nov 28 2021 The cold front responsible for today's cooler temperatures has pushed well to the SE of the region. High pressure is building in the wake of the front beneath the influence of rising heights and upper ridging. BSH A diffuse cold front trailing to the SW of the above clipper will push into the region on Monday night, stalling somewhere in the vicinity of the MO/AR border.
1130 PM CST Sun Nov 28 2021 Fair weather continues across the High Plains to close out the weekend with warm temperatures and some mid/high clouds overhead. With temperatures aloft above the 90th percentile and continued dry conditions, expect a large diurnal temperature spread with lows tonight ranging from around the freezing mark for southwest Nebraska to around 40 degrees near the Niobrara valley. Things change a bit Monday night as the upper ridge loses some amplitude and high pressure to our north pushes a weak cold front in our direction. Any scattered showers end later Tuesday morning with a brief cool down behind the front, though readings will still remain above normal with highs Tuesday generally in the low/mid 50s.
219 AM CST Mon Nov 29 2021 Chilly again this morning across the area in the wake of the dry cold front that moved through yesterday, with current readings in the upper 20s and low 30s. By tomorrow, an upper level ridge will begin building across the southern Plains into the Gulf Coast states the rest of the week.
307 AM EST Mon Nov 29 2021 High pressure will dominate on Monday with tranquil weather over the Ohio Valley. High pressure will dominate the rest of today leading to dry conditions and seasonable temperatures.
Winds will be from the N-NW, but less than 10 kts as high pressure builds over the area from the west. Discussion: An upper trough across the eastern Great Lakes will pull a frontal boundary across the area early this evening. Due to an upper trough across the northern Gulf, no return flow of moisture into this system. For Tonight, upper clouds will move east of the area with surface ridging building into the southern Appalachians. For Monday, surface ridging and very dry airmass will be rule across the southern Appalachians and Tennessee valley.
Portions of the higher elevations remain breezy; however, wind in areas adjacent to the foothills are decreasing. Westerly winds will keep areas of the foothills and adjacent plains warmer tonight. Models have high pressure aloft over all the southwestern United States, with weak northwesterly flow aloft for the CWA tonight and Monday. The airmass looks to stay dry in the lower levels these first two periods. For temperatures, Monday's highs should be 1-2 C warmer than this afternoon's. A weak upper level trough and associated cool front will affect the area on Tue. Cross-sections show limited moisture with the trough so don't expect any precip from it. Temperatures will be cooler behind the front, however, readings will still be 8 to 12 degrees above normal.