Aikyam-Lab/Synoptic-Bench huggingface dataset:
1041 AM EDT Thu Aug 24 2017 An upper level trough of low pressure over eastern Canada and the Northeast will bring cooler conditions to the region today and Friday. High pressure builds in for the weekend and a slow warming trend will take place as more sunshine develops across the area. Basically isolated light showers, perhaps a little more focussed across the higher terrain. Upper level trough of low pressure will be over the region today with low level cold air advection taking place. Upper trough over eastern Canada moves east and looks to provide sufficient dynamic support over northeast Vermont for a few showers in the afternoon.
638 AM CDT Thu Aug 24 2017 At 2 AM, a short wave trough was moving southeast across Wisconsin and Lower Michigan. For tonight, a 700 mb trough will move slowly east into the area. In addition, the combination of mostly clear to partly cloudy skies, light winds, and dry dew points will allow temperatures to fall into the lower to mid 40s in central and north-central Wisconsin.
Hi-res models demonstrating the potential for some additional activity this afternoon under the influence of the cold front than what was initially shown in global models.
Temperatures were nudged upward a couple of degrees ahead to account for pre-frontal compressional warming ahead of the approaching cold front. Maliawco Previous Discussion: Main focus in the short term forecast is the approaching low pressure trough and scattered rain showers and thunderstorms set to impact NE Montana over the next day or two. As a small scale short wave trough over Yellowstone National Park becomes absorbed into the main upper low from the Canadian Rockies, a lingering short wave extension of the ridge of high pressure looks to keep the low's impact at bay a bit. At least currently in the models, the strength of the approaching trough seems to be weakened when compared to previous model runs. Upper trof pushes into central Canada with the main low pressure lifting toward the Arctic Friday night.
642 AM CDT Thu Aug 24 2017 Mid- to upper-level ridging will build over the Northland today, bringing abundant sunshine and dry conditions. Temperatures will once again be on the cooler side of climatology, with highs in the lower 60s over the Minnesota Arrowhead region, to the upper 60s further inland. Chances of showers should remain on the low side during the day, but will persist as the WAA builds into the region.
With increased cloud cover and shower activity, expect highs to be a few degrees cooler than yesterday with mainly low 90s inland and upper 80s along the coast.
High pressure will encompass the region with fair weather cu and light winds.
VFR for all sites through the next 24 hours as dry high pressure extends across the area.
Weak low pressure and associated inverted troughing are located off of the FL west coast.
842 AM CDT Thu Aug 24 2017 There remains a small stratus area along and north of a warm frontal boundary lying across northwest North Dakota. Potential for early morning low clouds/patchy fog in portions of western and central ND, and increasing chances for showers and thunderstorms late tonight are the highlights in the near/short term periods. Otherwise for the rest of the short term period, a mid/upper level transitory ridge will slide into western and central ND, resulting in plenty of sunshine, dry and warm weather.
724 AM EDT Thu Aug 24 2017 An upper level trough of low pressure over eastern Canada and the Northeast will bring cooler conditions to the region today and Friday. High pressure builds in for the weekend and a slow warming trend will take place as more sunshine develops across the area. Upper level trough of low pressure will be over the region today with low level cold air advection taking place. Upper trough over eastern Canada moves east and looks to provide sufficient dynamic support over northeast Vermont for a few showers in the afternoon.
1033 AM EDT Thu Aug 24 2017 High pressure remains in control at the surface with upper-level troughing across the Eastern CONUS resulting in drier air, a clear sky, and temperatures a degree or two below normal. Chattanooga Airport, TN 85 64 85 65 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 83 61 83 61 / 0 0 0 0 Oak Ridge, TN 83 61 83 60 / 0 0 0 0 Tri Cities Airport, TN 81 55 79 58 / 0 0 0 10.
905 AM PDT Thu Aug 24 2017 A cold front will exit north Idaho this morning with showers coming to an end.
An upper level trough will move through the area today bringing with it some cloud cover and cooler temperatures.
629 AM CDT Thu Aug 24 2017 The longwave trof will persist across eastern NOAM through tonight, with some deepening into the Great Lakes and OH Valley today as a well-defined short wave trof digs from the western Great southeastward within the northwest flow aloft. Temperatures today will be a tad warmer than yesterday, but along with the dew points, will still be below average for late August. High pressure centered to the east will still dominate the surface/lower trop tonight resulting in light winds, low dew points, and below average temps.
Farther S along the cold front FG is down to a 2 to 3 mi. With enhanced cloud cover and a cooler airmass advecting south across the region, high temperatures today to climb into the mid to upper 80s.
This could carry in some additional stratocu before high pressure advances more strongly into Lower Michigan and brings a clearing trend toward late evening through sunrise Friday. This wave will also bring in more cooler air resulting in high temps only in the 60s to around 70 degrees today. High pressure coming down from Canada then builds in behind the departing trough as heights begin to build across the region. Lift along and ahead of this boundary and the cooler air left behind will create a favorable environment for waterspouts through this evening. High pressure will then settle overhead Friday and further inhibit cloud development. Wind and wave conditions will remain favorable through the weekend as the high pressure system drifts slowly across the Great Lakes.
A dry cold front will be passing through the forecast area today but then stall from western Montana back towards south central Oregon. Behind the front temperatures will be 5 to 10 degrees cooler and some locally breezy conditions.
Mid morning water vapor imagery reveals low pressure off the southern California coast with abundant dry air in place across the southern half of Arizona thanks to weak southwesterly flow across the region.
Potential for early morning low clouds/patchy fog in portions of western and central ND, and increasing chances for showers and thunderstorms late tonight are the highlights in the near/short term periods. Otherwise for the rest of the short term period, a mid/upper level transitory ridge will slide into western and central ND, resulting in plenty of sunshine, dry and warm weather.
Cooler temperatures are expected today in the wake of overnight storms and abundant cloud cover. However, another round of storms is expected this afternoon and evening, initially over the high terrain than focusing over eastern New Mexico this evening.
/issued 653 PM CDT Sun Mar 11 2018/ High pressure building across the region will allow for northwest winds around 10 to 15 knots with higher gusts tonight.
SFC winds are forecast to be easterly or northeast through much of the day, which will recycle cooler air back across the forecast area.
844 PM EDT Sun Mar 11 2018 High pressure will continue to provide fair and dry weather for the region through Monday.
1243 AM EDT Mon Mar 12 2018 Low pressure will begin to move east into the Canadian Maritimes overnight as weak high pressure builds north of the area into Monday.
Well amplified upper level ridging over the Intermountain West will continue to expand eastward on Monday, which will allow thermal profiles to warm. High temperatures will improve compared to today, reaching the lower 30s to lower 40s.
653 PM CDT Sun Mar 11 2018 High pressure building across the region will allow for northwest winds around 10 to 15 knots with higher gusts tonight.
This will keep daytime highs a little cooler, only reaching the upper 40s to lower 50s.
1142 PM CDT Sun Mar 11 2018 Early afternoon surface analysis showed a weak surface cold front/wind shift extending from east-central Minnesota through central Iowa. 12Z models are in agreement that there will be long wave troughing in place over the eastern part of the country to start the week. A system coming across eastern Canada will help to amplify this troughing and an embedded short wave trough will cross the Great Lakes and bring some weak forcing across Wisconsin Monday night. As the eastern trough moves slowly out over the Atlantic, the long wave ridging over the Rockies will slide east and over the Midwest for the middle of the week.
827 PM EDT Sun Mar 11 2018 Upper air pattern consists of a 500 mb trough over the central plains and another over northern Manitoba and Ontario. The trough over central Canada will move south and affect the upper Great Lakes tonight and the lower Great Lakes on Mon. An upper low will move just E of the CWA Mon night, with a vort max or two rotating around the W side of the low and across the area Mon night into Tue.
A low pressure system will move across the Southern Appalachian Region tonight. as cooler air moves in tonight. Over the higher terrain of the plateau and portions oF southwest VA and northeast TN. Chattanooga Airport, TN 39 51 32 49 / 90 30 0 10 Knoxville McGhee Tyson Airport, TN 41 48 31 45 / 100 50 10 10 Oak Ridge, TN 40 49 30 47 / 90 40 10 10 Tri Cities Airport, TN 40 44 27 42 / 100 80 20 20 TN.
Weak high pressure prevails on Monday, with light northwesterly winds, and abundant sunshine, which should boost temps mostly into the 40s, but reaching the lower 50s in southeast NE.
Inverted trough axis very slowly working through the area today, with the entire forecast area socked in under overcast stratus and many locations along the actual boundary still seeing widespread fog. High pressure will continue settling into the Dakotas this evening, becoming stationary and keeping our area dry and under northwest flow through the period. With the upper trough over the Great Lakes tomorrow, cyclonically curved flow and a negative cu rule point toward redevelopment of stratocu late morning through the afternoon in western Wisconsin and eastern Minnesota.
1007 PM EDT Sun Mar 11 2018 A low pressure system will cross the area late tonight into Monday morning.
Decreased the low temp in the western zones for overnight. Water vapor loop indicated a short wave trough over the northern Ontario/MAN border. High pressure remains centered to the west, with west winds over the forecast area at around 10 kts. Temps have been mostly at or below the freezing mark, but with plenty of March sun there will continue to be melting on some surfaces. On Monday night, this high pressure will lead to mostly clear skies and some cold air advection allowing for temperatures to fall into the single digits above zero.
Also decided to issue a special weather statement for the expected freezing fog along/near the Hi-Line late this evening through daybreak Monday. Decided to hold off on issuing a freezing fog advisory since some mid- to upper-level cloud cover may temper the extent of fog.
The gusty northerly winds behind Sunday morning's cold front will decrease to 10 to 15 knots this evening. /Issued 246 PM CDT Sun Mar 11 2018/ /Through Tonight/ In wake of this morning's cold front, gusty north winds of 20-35 mph have prevailed area-wide today. Clouds will have mostly cleared the area by morning, but temperatures will only climb into the lower 60s by afternoon. Some outlying colder spots may drop to near freezing.
739 PM EDT Sun Mar 11 2018 High pressure will continue to provide fair and dry weather for the region through Monday.
Stiff northerly flow over the Central Plains should gradually diminish today and tonight as the pressure gradient relaxes ahead of the approaching ridge. Clouds should clear out by the time low temperatures are reached tonight, but clouds may keep readings 5-8 degrees warmer in the far east compared to west of Manhattan.
An upper level low continued to shift southeast across Southeast Missouri into Eastern Tennessee this evening. Associated to the low were widespread low level ceilings positioned along the southern. high pressure centered over Southern Nebraska was also sagging southward this evening. with breezy northerly winds continuing ahead of the high across Eastern Oklahoma and Northwest Arkansas. With the low expected to continue its southeastward track along with northwesterly flow over the CWA. the upper level flow looks to become more westerly which should finally shift the low clouds off to the east. temperatures during the night look to slowly fall into the low/mid 30s over the CWA. for the evening update have adjusted hourly sky grids based on the mentioned above and also added a few degrees to the low temps across Northwest Arkansas where the clouds should hang on the longest.
Partly cloudy and mild on Monday under a weak high pressure ridge.
An area of low pressure, that brought 1 to 4 inches of snow to parts of the far southern and southwestern CWA early this morning, is now over central Missouri.
Fog still looks possible, but has cut back to mainly the Milk and Missouri River Valleys along the high line with some of the first drops in visibility occuring over the last half hour at Malta and Wolf Point. GAH PREVIOUS SHORT TERM DISCUSSION: The upper level pattern over CONUS & Canada is an amplified ridge over the West and a large trough over the East, anchored at Hudson Bay. The main effect from any clouds that might develop is to prevent the formation of freezing fog there tonight. The ridge fully reestablishes itself Monday as the embedded disturbance moves out of the region. But with the ridge axis to our west, and continued northerly flow aloft, and the deep snow- pack, temperatures will struggle to reach normal until mid-week.
However, moisture and overall atmospheric instability will gradually increase tonight ahead of an approaching cold front.
The clouds will eventually move out of the remaining CWA this evening, making way for clear skies and light winds overnight as high pressure settles in. High pressure will remain in place on Monday as well, bringing mostly sunny skies and light winds.
Ongoing cold advection in the wake of a cold front will keep temps relatively cool this afternoon. Clearing clouds early Monday will help temps to rebound into the low 50s by Monday afternoon.
This system looks to moisture starved to bring more than increased cloud cover to the lower elevations.
VFR ceiling and visibility conditions will prevail along the north central gulf coast region through 03z ahead of a cold front approaching from the northwest. There remains potential of the eastward passage of lingering showers over the local area this evening as a cold front approaches from the west. Frontal passage occurs this evening, bringing a more established northwest flow, lowering deep layer thickness values and resultant cooler overnight lows in its wake.
Cold front moving through the region, with the tighter pressure gradient, stronger winds, and cooler air over E TX to follow later this evening. Cold front is progressing into southern Louisiana and will continue to move offshore later today. Otherwise, dry and cooler weather is forecasted for Monday as ridge of high pressure settles over the Southern Plains. No freezing conditions are forecasted but frost could occur in the normally colder locations.
516 PM MDT Sun Mar 11 2018 Current surface analysis shows high pressure centered over the western Dakotas, with clear skies and light winds across the area. Upper level ridging will dominate the weather over the next several days, with a significant warming trend in most areas by midweek.
705 PM CDT Sun Mar 11 2018 Moderate to heavy showers have taken shape along the cold front during the past hour or so. This will keep daytime highs a little cooler, only reaching the upper 40s to lower 50s.
1107 PM EDT Sun Mar 11 2018 Mesoscale update: Radar, satellite, and surface observational trends suggest 2 or 3 confluence lines over the eastern Gulf in advance of the cold front, which is now moving across the northern Gulf, having just cleared Apalachicola.
Still looks like temperatures will cool to the freezing mark in the advisory area by late tonight, allowing for up to 2 inches of accumulation. Upper low is working its way across Middle Tennessee tonight, with a dry slot dividing earlier area of showers currently moving off the Cumberland Plateau and a band of snow that is just now arriving at CKV.
/issued 223 PM CDT Sun Mar 11 2018/ (Tonight and Monday) Gusty north winds continue to affect most of the area this afternoon behind a cold front that moved through last night into this morning. Temperatures range from the lower 50s along/north of I-20 to the lower 60s for southern areas. But, upper level clouds will continue to stream across the area, keeping this cooling in check somewhat, so have kept most areas above freezing, although a few locations getting down to freezing isn't out of the question.
1143 PM CDT Sun Mar 11 2018 As an upper trough makes its way across the middle Mississippi Valley today, an area of high pressure is slowly building into mid-America from the northwest and will continue to do so for the remainder of the afternoon and this evening. Lingering cloud cover is expected to clear overnight tonight from west to east across the area, allowing temperatures to radiate down into the low 20s by early Monday morning.
An upper low and trough remains well offshore but it is sending a southwest flow into the area and pumping up a transitory ridge over the Pacific Northwest. Monday should be a sunny and dry day with clouds increasing in the afternoon as the low moves closer to the coast and a frontal system approaches. Temperatures should be several degrees warmer than today. A ridge over the area will keep skies generally clear until about 20Z tomorrow afternoon though there could be a few cumulus clouds in and near the mountains.
High pressure will build into the region overnight and Monday bringing drier and warmer weather to the region.
associated with a pre-frontal trough. A resurgence of showers and isolated storms expected later tonight into Monday morning associated with the cold front. Low pressure across Se Ga will move Ne to off the South Carolina coast by sunrise on Monday. This feature will drag a cold front across our local waters during the early morning hours on Monday.
Beneath the stratus, question is whether there is enough moisture depth and lift for freezing drizzle or squeeze anything out. Highs will range from the the low 30s near the Minnesota border to the 40s over central and southern Iowa. /Monday night through Sunday/ Upper ridging will commence to the west while over the Great Lakes a deep trough will set up.
727 PM EDT Sun Mar 11 2018 A low pressure system will cross the area late tonight into Monday morning.
Currently, high pressure is situated over the MONDAK region with westerly winds of 5 to 10 mph over the forecast area and sunny skies. We utilized a blend of some of the colder guidance for low temperatures tonight with readings in the single digits above zero to the lower teens. It does appear that the moisture is shallow, comprising only the lowest couple hundred feet of the atmosphere.
High pressure will prevail across the greater region. This high will eventually move east tomorrow with lowering pressure across eastern Colorado. Highs tomorrow will be warmer and in the 50s with a weak WAA pattern developing.
A strong upper level trough axis will sweep through the Gulf South tonight.
/issued 950 PM CDT Sun Mar 11 2018/ Gusty nnwly winds continue to usher in much cooler and drier airmass this evening.
1003 PM CDT Sun Mar 11 2018 With the cold front clearing our far offshore waters. Clearing skies from north to south with cold and dry air advection lowering sunrise (inland) temperatures into the lower to middle 40s/coastal readings into the lower 50s.
Southwestern edge of a large area of low clouds on the backside of the system translating into the lower Mississippi River valley blankets nwrn AR and portions of nern OK this evening. Conditions will improve by this evening as surface ridging builds south and winds subside.
Strong high pressure aloft will develop over the region early this week, followed by a major eastern Pacific trough moving inland by midweek.
A lee-side trough will develop on Monday which will help the winds come back around to the south and southwest. An upper level short wave trough over western Idaho will push through the ridge over the Rockies and then it will start to slide southeast onto the high plains Monday.
As colder air quickly advects into the area behind the cold front and the upper low moves overhead, a light rain/snow mix cannot be ruled out across the higher elevations of far north Georgia Monday morning. Lingering showers will move east of the CWA by Monday afternoon with the departing upper low, and skies will clear from west to east through the day. With cold air advection through the day, high temperatures on Monday will remain well below average, struggling to reach the lower 50s across north Georgia and mid-to-upper 50s in central Georgia.
This activity isn't expected bring much snow to the higher terrain with accumulations of just an inch or two possible.
The 19z MSAS surface analysis showed an area of high pressure over the central and eastern sections of the Great Lakes region. A cold front extended from central Ontario southwest to near Minneapolis. Radar mosaic has been picking up on some sprinkles or flurries over the MN arrowhead in the vicinity of the cold front. Winds will also turn northwest later this evening through the overnight hours as the cold front moves through the area. Look for min temperatures to range from the lower 20s north-central WI, to the upper 30s across east-central WI. A decent amount of clouds will limit diurnal warming and prefer the cooler side of guidance. Therefore, max temperatures to range from the lower 30s north-central, upper 30s to around 40 degrees elsewhere (slightly cooler near Lake MI).
704 PM CDT Sun Mar 11 2018 Strong compact upper level low centered over the Lake of the Ozarks is moving southeast. Wet snow is occurring northeast of the low track with some decent accumulation in some areas form central into east central MO.
/issued 338 PM CDT Sun Mar 11 2018/ Cool surface ridging continued to wedge itself southward over the region this afternoon, with progressive drying aloft as noted by the loss of mid-level clouds across much of our northern zones.
641 PM CDT Sun Mar 11 2018 The upper level trof that was affecting the forecast area today was moving out of northwest Wisconsin as of 19Z/2pm. One more piece of vorticity was already beginning to affect northeast Minnesota as a longer wave trof in Ontario was nearby. At the surface, a couple of weak surface trofs were affecting the region. They were working in concert with the upper level trof to generate some flurries over the Arrowhead. Cannot rule out some very light snow amounts over the higher terrain over Iron county and have a mention.
658 PM CDT Sun Mar 11 2018 Water vapor loop indicated a short wave trough over the northern Ontario/MAN border. High pressure remains centered to the west, with west winds over the forecast area at around 10 kts. Temps have been mostly at or below the freezing mark, but with plenty of March sun there will continue to be melting on some surfaces. On Monday night, this high pressure will lead to mostly clear skies and some cold air advection allowing for temperatures to fall into the single digits above zero.
Upper level ridge axis over the state will shift east tonight and Monday.
With strong cold fronts with predominantly due north or slightly east of north orientation, our CWA acts as a funnel east of the escarpment, specifically just east of the I-35 corridor.
An upper level ridge over the area will shift east tonight through Monday night.