Aikyam-Lab/Synoptic-Bench huggingface dataset:
341 AM CST Sun Nov 28 2021 H5 analysis from earlier this evening had a broad ridge of high pressure, which extended north from eastern Oregon into southwestern portions of the Northwest Territories of Canada. Downstream of this feature, closed low pressure was located over eastern Quebec with a trough extending south into the Canadian Maritimes. At the surface, high pressure was located over the western half of the forecast area. With light westerly drainage winds tonight, I did go slightly cooler in the Platte River Valley and western Sandhills. Slightly warmer temperatures are expected on Monday as warmer air pushes into to the area ahead of an approaching cold front. A cold front will pass through western and north central Nebraska Monday night.
The sun returns on Monday with your more typical heating trends as the warmer readings will once again be in the south.
538 AM CST Sun Nov 28 2021 Dry and warm weather conditions will continue across the region this period with today being the cooler day.
/issued 301 AM CST Sun Nov 28 2021/ The weakening upper-level storm system which brought some welcome rainfall to portions of the South Plains and Rolling Plains yesterday is moving off toward the lower Miss. The cool surface ridging will be counteracted by building heights aloft and plentiful sunshine and high temperatures this afternoon should top out in the 60s. just slightly warmer than average for late November. The positively tilted, broad persistent ridging pattern across the Pacific Northwest will deflect any meaningful Polar Jet energy well to our north and east. Weak northwest H50 flow on the eastern extent of the ridging, will dominate the pattern locally, helping to keep surface winds relatively light while surface temperatures warm above normal.
A weak upper level low will set up shop over central Baja CA later today and meander in that area for most of the upcoming week.
301 AM CST Sun Nov 28 2021 The weakening upper-level storm system which brought some welcome rainfall to portions of the South Plains and Rolling Plains yesterday is moving off toward the lower Miss. The cool surface ridging will be counteracted by building heights aloft and plentiful sunshine and high temperatures this afternoon should top out in the 60s. just slightly warmer than average for late November. The positively tilted, broad persistent ridging pattern across the Pacific Northwest will deflect any meaningful Polar Jet energy well to our north and east. Weak northwest H50 flow on the eastern extent of the ridging, will dominate the pattern locally, helping to keep surface winds relatively light while surface temperatures warm above normal.
/Issued 401 AM EST Sun Nov 28 2021/ Weak cold front and southern stream upper disturbance will move across the southeast US today. High pressure and dry conditions return for Monday.
Precipitation chances will be limited with this feature, as the airmass in the lower levels is dry. This upper energy will move along a cold front which will pass through during the overnight. High pressure will build from the northwest during the day Monday, yielding a sunny day. The center of the high pressure ridge will settle just to the west Monday night. Readings could fall to around freezing over interior SE GA, but too close to call for a freeze watch at this point.
Otherwise, cold front associated with northern disturbance in the jet is progged to move into the area through this evening bringing a reinforcing shot of cold air, with lows tonight down into the 20s and 30s CWA-wide. Lusk Mid and upper level flow will remain dry and northwesterly for the better part of the extended as strong mid level ridging remains anchored over the west coast.
A cold front will continue to move across the area early this morning, with high pressure building in over the area later today. Highs will be a few degrees cooler than yesterday. South winds will return on the back side of high pressure Monday as another clipper moves across the Great Lakes. It will be a bit warmer mainly west of the MS River, not so much elsewhere given more cloud cover.
The combination of clear skies and light wind beneath the thermal trough will make for ideal overnight cooling, especially over north central MS, and a light freeze is expected there.
Fog will be possible across central and northern portions of the CWA, but winds may remain just high enough to inhibit any relatively dense fog from forming especially across the Lower Rio Grande Valley. A similar setup occurs on Monday as high pressure continues to build into the Plains and then push eastward.
Most locations will remain above freezing in the 30s through sunrise Monday.
234 PM CST Sun Nov 28 2021 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.
High pressure dominates across the region with dry and mostly sunny skies across the region. Overnight, an area of low pressure with moisture associated with it will be working its way across the Gulf of Mexico, as well as a cold front working its way down the peninsula. The cold front will move through the area tomorrow. Behind the FROPA, reinforcing cooler and drier air will filter down the peninsula with northwesterly wind flow. Highs tomorrow given the cloud cover in the morning and then the cold front will be in the low to mid 70s.
Mostly expecting lows in the lower 20s, but wouldn't be surprised to see a few readings in the upper teens across some of the deeper valleys. High pressure settles over the area on Monday. Despite plenty of sunshine, it will be a chilly day across the region with afternoon high temps only reaching the low to mid 40s.
1248 PM EST Sun Nov 28 2021 A mid level trough will dig east into the eastern Great Lakes today, bringing clouds and wind to the region. High pressure will then build into the area tonight, allowing skies to clear. The high will depart to the east on Monday. This should allow for a slow erosion from the west of the lower level clouds from late morning and into this afternoon. It will be cold with lows falling into the lower to mid 20s. On Monday, high pressure exits to the east. With a developing southerly flow, highs will warm into the upper 30s north to the lower 40s south.
High pressure will then build into the area from the west through mid week. As of 19Z, the sfc cold front was crossing the mountains and continuing to move south and east. As the high is building in, it will remain rather breezy to windy at times thanks to the tight pres gradient, but winds should decrease toward evening as the high center builds over and the pres gradient weakens. Given the CAA that had been ongoing since the overnight period, and despite ample sunshine during the daytime, highs on Monday will we about 10 degrees cooler than today. Otherwise, light winds Monday night with high pressure extended over our area from the high center to our SW.
/issued 704 AM EST Sun Nov 28 2021/ An upper level disturbance tracking along the Gulf coast today and exiting to the Atlantic tonight will usher in a diffuse cold front that settles southward down the state today and tonight. High pressure slides east today as a front with isolated showers settles south. High pressure builds in behind the front.
Surface analysis this morning shows a weak and dry cold front approaching the NW CWA zones with high pressure retreating off the SE US coast. Despite the sunshine on Monday, northerly winds will help to counteract heating -- with highs in the lower 50s being common during this period.
142 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.
A cold front may move through late in the week but forecast guidance varies by that time. Quiet weather continues with a ridge of high pressure moving through the region. High pressure will shift south and east late tonight with southwest winds increasing on Monday. The ensemble spread for high temperatures tomorrow is pretty tight, but went on the higher end of guidance with readings well into the 60s in the afternoon.
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.
934 AM CST Sun Nov 28 2021 Water vapor imagery shows the upper level disturbance moving across the Lower Mississippi Valley with rain persisting for lower Acadiana and the adjacent coastal waters.
Concur with deterministic runs that predict the upper trough, extending from the Great Lakes region to the Southern Plains/Texas, to move eastward across the SERN CONUS/offshore, while the ridge to the west of the trough axis becomes flat resulting in quasi-zonal flow over most of the CONUS Monday. Concur with the NBM with regard to minimum temperatures, which is cooler than the SREF ensemble mean. Remainder of Monday, dry and slightly warmer.
The northern stream upper trough across the Great Lakes will pull a frontal boundary across the region today. The southern stream upper trough over the northern Gulf will keep moisture trapped well south of the Tennessee valley.
Ogorek The upper longwave trough situated over the Great Lakes that a convoy of clipper-type systems has been riding along will more or less remain in place through at least the latter half of the work week.
311 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.
204 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.
With the lowering of clouds today, moisture will also sink, so looking like a small chance for a few sprinkles late in the day as the dry layer shrinks towards sunset. Later tonight, a cold front on the back end of the short wave will drag through the area, clearing skies and bringing another northwest to north wind surge. Cold front will pass through the area overnight, increasing N/NW winds by 12Z. W/WNW winds 5-10 kt will veer to WNW/NW and increase to around 15 kt this evening and tonight behind a mostly dry cold front.
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.
The northern stream upper trough across the Great Lakes will pull a frontal boundary across the region today. The southern stream upper trough over the northern Gulf will keep moisture trapped well south of the Tennessee valley. BW Chattanooga Airport, TN 61 30 51 34 61 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 56 27 46 33 57 / 0 0 0 0 0 Oak Ridge, TN 56 27 46 32 57 / 0 0 0 0 0 Tri Cities Airport, TN 53 23 41 29 53 / 0 0 0 0 0.
The inversion is strengthening, with fog reported in the Lower Treasure Valley this morning.
208 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.
(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.
Currently see temperatures in the lower to mid 70s. As the low pressure continues to slides east, an associated cold front will slide southeast and eventually cross the Florida Keys late tonight into early Monday. Once this next front moves through high pressure currently in the Central Plains, will move into the southeast U. Winds will become more northwest to north this evening and gradually freshen in advance of an approaching cold front from the northwest.
1245 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.
Dry conditions expected early this afternoon before snow showers develop as upper troughing moves in aloft. CAA will be reinforced overnight on the backside of the trough axis as winds aloft become northwesterly.
An upper-level ridge dominates our part of the country, with clear skies as far as the eye can see.
133 PM EST Sun Nov 28 2021 High pressure will be along the coast today. A dry cold front will traverse the forecast area tonight bringing another shot of cool air to the region. High pressure ridging into the area Monday with cold advection continuing with surface winds out of the north. As a result, lows will bottom out near to slightly below freezing early in the night before leveling off.
The cloud cover from the clipper and the waa under the building upper ridge will keep overnight lows from dropping off. On Monday, breezy northwest winds will enhance mixing under the ridge helping to push highs into the 50s and 60s. Confidence is not high on position or timing given the lack of consistency and the low QPF potential but did add in some slight chances from Pierre south.
/NEW/ /Through Monday Afternoon/ Much drier weather conditions are taking place across the region as today's cold front continues to move south. The northerly breeze behind the front will keep this afternoon's highs in the low to mid 60s under mostly clear skies. The high pressure will start to move eastward on Monday bringing back the southerly winds and warmer temperatures.
135 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 ridge will shift east tonight. The moisture profile south of I-94 is not only questionable for all snow, but the boundary layer should warm above freezing as the precipitation pushes in. This should lead to primarily drizzle or freezing drizzle depending on surface temperature, but some wetbulbing through this warm layer may still allow for some snowflakes if the DGZ saturates for a brief time.
High pressure will keep us dry here as another system moves south of the region this afternoon. This dry pattern will continue for most of the week as strong high pressure remains in place.
We'll see a brief cool down overnight tonight as the longwave trough axis swings across the area along with a surface cold front. Temperatures should rise to near seasonal levels on Monday with dry dewpoints in the lower 20s to perhaps upper teens in the northwest counties.
Surface southerly flow to continue to support a gradual warming trend into Monday night with overnight lows in the low to middle 40s.
1011 AM MST Sun Nov 28 2021 Water vapor shows western CONUS ridge rebuilding into the Northern Rockies/Northern Plains. Upper ridge will dominate our weather through Monday, with very mild temps (close to records in some places) and dry conditions.
/Issued 1212 PM CST Sun Nov 28 2021/ /Through Monday Afternoon/ Much drier weather conditions are taking place across the region as today's cold front continues to move south. The northerly breeze behind the front will keep this afternoon's highs in the low to mid 60s under mostly clear skies. The high pressure will start to move eastward on Monday bringing back the southerly winds and warmer temperatures.
1118 AM CST Sun Nov 28 2021 H5 analysis from earlier this evening had a broad ridge of high pressure, which extended north from eastern Oregon into southwestern portions of the Northwest Territories of Canada. Downstream of this feature, closed low pressure was located over eastern Quebec with a trough extending south into the Canadian Maritimes. At the surface, high pressure was located over the western half of the forecast area. With light westerly drainage winds tonight, I did go slightly cooler in the Platte River Valley and western Sandhills. Slightly warmer temperatures are expected on Monday as warmer air pushes into to the area ahead of an approaching cold front. A cold front will pass through western and north central Nebraska Monday night.
Hot and dry conditions will set back in Sunday as the ridge builds again over the western CONUS. High temperatures will quickly climb back into the 60s across the plains and 40s and 50s in the high country. Lows Sunday night should also be very warm, in the 30s across the plains and 20s in the high country. The usual low-lying cold spots will be a few degrees colder, and lee troughing will enhance the downslope flow and warming in and near the foothills keeping lows in the lower foothills and adjacent plains about 5 to 10 F warmer overnight. Overall there is very little change in model consensus for the upcoming week with the persistent northwest flow pattern with broad ridging over the eastern Pacific.
1245 PM PST Sun Nov 28 2021 Warm days and cool nights will continue for much of the upcoming week as high pressure aloft hangs on over the western part of the country. A weak area of low pressure to the south will keep the marine layer quite thin with for some patchy fog possible near the coast over the next few days. WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO High pressure continues to dominate much of the Great Basin into the state of California today leading to another day of temperatures 5 to 15 degrees above average. This weak offshore flow pattern will continue for much of the week as this area of high pressure remains in place.
1011 AM MST Sun Nov 28 2021 Today, the ridge axis will slide eastward over the Great Basin allowing for warm air advection to continue. As a result, afternoon highs will end up a few degrees warmer than yesterday. Despite the mostly clear skies models are suggesting an increase in the lows tonight. This wave will cause the ridge to flatten out, but this looks to have little impact to the sensible weather.
241 PM CST Sun Nov 28 2021 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.
912 AM 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.
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.
1109 AM CST Sun Nov 28 2021 Dry and warm weather conditions will continue across the region this period with today being the cooler day.
Meanwhile, upper ridging is in place across the Great Basin with northwest flow aloft remaining over the Plains. At the surface, lee troughing continues to deepen with a ridge extending from central TX into the Ozark region. After Mon, our next chance for 70 degree highs looks to be on Thu as we get back into some decent downslope conditions with lee troughing remaining in place.
A ridge of high pressure currently extending from Manitoba southward into the Plains will shift eastward across Illinois tonight. As the high moves overhead, northwesterly winds will become light and variable toward midnight as temperatures drop into the middle 20s. With the high quickly shifting into the Ohio River Valley, a weak southerly return flow will develop across the western KILX CWA late, which may help readings rise a couple of degrees west of the I-55 corridor toward dawn. Models continue to show a band of mainly mid-level cloud cover developing within the WAA regime on the back side of the high late tonight into Monday morning. Given strengthening southerly flow and at least partial sunshine across the W/SW, high temperatures will be several degrees warmer than today. ranging from the lower 40s far northeast around Danville and Paris.
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.
254 PM CST Sun Nov 28 2021 A nice surge of cooler and much drier air is beginning push south near I-64.
As this low moves further east and moisture wanes, lake- enhanced snow showers will come to an end later on this evening.
A deep upper trough is over the eastern states with a ridge out west. As we go through the week, the eastern trough will relax, and the western ridge will nose eastward toward the Tennessee Valley. A cold front had moved through Middle Tennessee, so temps were a little cooler than yesterday with a northwest wind adding a little chill. The mention of patchy freezing fog has been added across lakes and rivers. plenty of sunshine will warm temps to the upper 40s and lower 50s, still a few degrees cooler than normal.
anticipated cold front is working its way through the CWA and should be south of the area after day break. Otherwise, cold front associated with northern disturbance in the jet is progged to move into the area through this evening bringing a reinforcing shot of cold air, with lows tonight down into the 20s and 30s CWA-wide. Lusk Mid and upper level flow will remain dry and northwesterly for the better part of the extended as strong mid level ridging remains anchored over the west coast.