Aikyam-Lab/Synoptic-Bench huggingface dataset:
Freezing fog is possible in the valleys of northern Nevada beginning late tonight into Tuesday morning. High pressure will keep a lid on active weather until about mid-week as a Pacific system enters the west coast. Given the decent precipitation from the last system, will continue with patchy freezing fog over the valley locations across mostly northern Nevada for the overnight tonight. Upper level high pressure will continue to build for Tuesday and Tuesday night. Skies are expected to remain mostly clear as the ridge axis passes slowly to the east.
Since then cloud cover has increased and a warm front is approaching from the southwest. Meanwhile there are light showers moving into west Tennessee ahead of a cold front.
Temperatures remain in the lower to mid 70s with dew points uncomfortably in the same range. Though this front will be weak, it will bring some relief in the form of lower dew points and slightly cooler temperatures.
523 AM CST Mon Dec 4 2023 (Today and tonight) The cold front has pushed through the area, and high temperatures today are expected to be just a touch cooler than yesterday, but still above average for this time of year.
Winds remain light and variable across the Keys and marine platforms as the high pressure driving our winds the last few days has left the Keys in weak synoptic scale flow (col region).
Low temperatures fall into the lower to upper 20s. broad upper level ridging approaches from the west.
Western NOAM ridge will shift east in the period and offer mild and dry weather for most of the week. Upper ridge will shift east supporting increasingly warmer weather the next couple days. Upper trough will then advect into the western CONUS by the end of the week, with this system expected to support a return back to progressive NW flow, supporting cooler conds, along with some low chances for snow showers with passing impulses. Strong northwesterly winds will develop later this morning behind another cold front passage and persist into the late afternoon and early evening.
(Now through Tuesday) A northwest flow aloft will continue in the wake of a cold front. A weak reinforcing cold front will pass through the area on Tuesday, however no rain is expected due to the very dry airmass in place. Highs on Tuesday will be cooler behind the front, generally in the low 60s.
456 AM CST Mon Dec 4 2023 (Today through Tuesday Night) An upper lvl ridge is beginning to amplify over the Western region of the CONUS with northwesterly flow aloft over Arkansas. At the sfc, a high pressure center will be located across north-central Texas. The region has seen a couple dry FROPAs that have ushered in a drier and cooler airmass into the region. On Tuesday, the upper lvl ridge will slide eastward, but remain over situated over the Desert Southwest region of the CONUS. At the sfc, a moisture starved or dry cold front will move through the state on Tuesday.
516 AM CST Mon Dec 4 2023 (Today and tonight) Water vapor imagery currently shows the upper level trough over the central Midwest where it is expected to track into the eastern region by Monday afternoon. Tonight as the next upper level system digs southward an associated cold front will quickly sweep through the FA.
The series of storms will finally end this morning, leaving a break of about 48 hours before the next trough brings precipitation to parts of central Idaho. Clear skies will allow temperatures have larger spreads with colder lows and warmer highs. There is abundant moisture from the last three days, and with the last storm bringing in a warmer air mass, the snow pack will evaporate more so than with a colder air mass, so there is plenty of moisture. An upper level ridge is moving across the region during this time, so wind will be light and synoptic subsidence will also aid fog and stratus formation.
(Today and tonight) The cold front has pushed through the area, and high temperatures today are expected to be just a touch cooler than yesterday, but still above average for this time of year.
627 AM EST Mon Dec 4 2023 A cold front will move offshore later today, with high pressure building in for tonight.
The trend in the model soundings is for more moisture and saturation to hold on in the lowest 3. An impressive and deep midlevel trough is forecasted to amplify and deep across Tennessee Valley late Tuesday. Progressive longwave trough and ridge couplet is anticipated for the middle to end of the weak.
(Today through Tuesday) A comfortable start to the week is expected across Deep South Texas with high pressure in control. Highs top off a couple of degrees warmer than yesterday into the upper 70s both today and Tuesday, with lows also gaining a degree or two into the upper 50s or low 60s across the RGV and low 50s across the ranchlands.
527 AM CST Mon Dec 4 2023 - A cold front will move through the region this afternoon bringing the chance (~30%) for sprinkles/drizzle.
345 AM CST Mon Dec 4 2023 - A cold front will move through the region this afternoon bringing the chance (~30%) for sprinkles/drizzle.
Meanwhile, water vapor imagery clearly depicts a mid- to upper-level "clipper" system moving toward the Ohio and Tennessee Valleys, generally rotating around the base of a longwave trough encompassing the eastern CONUS. This will provide a (dry) cold front to advance across our area this afternoon, shifting winds to a northwesterly direction. After afternoon highs in the 50s and 60s, temperatures will decline to the 30s tonight with sub-freezing temperatures possible north of I-20.
High pressure will build back into the region later today into Tuesday.
Dry conditions are expected by noon with brief ridging. Forecast soundings continue to support snow for this system, though above freezing surface temperatures and light QPF under 0.
A strong ridge of high pressure will build across the region over the next couple days leading to a noticeable warming trend. By Tuesday, afternoon high temperatures across the lower deserts will top out in the mid to upper 70s to possibly as high as 80 degrees.
Expect highs to reach up to the upper-50s to lower-60s, which is warmer than average for early December.
The highest amounts will be across central Wisconsin, with little to no snow across northeast Wisconsin. Forecast Discussion: A ridge of high pressure will provide dry weather to the region today with temperatures near seasonable levels for this time of year. Clouds are expected to make their way back into the areas that clear out through the afternoon as the ridge heads east and winds turn west then southwest throughout the day. Highs today are expected to mainly be in the lower to middle 30s.
223 AM MST Mon Dec 4 2023 Winter weather advisories remain in effect until 900 AM MST across the Bitterroot/Sapphire Mountains and the Lower Clark Fork, Potomac/Seeley Lake and West Glacier Regions and the Clearwater Mountains, where freezing rain is a concern given cold sub-surface temperatures causing untreated roadways to freeze. A deep trough (501-dam) of low pressure will move into the Gulf of Alaska today, causing downstream amplification of a high pressure ridge across the Pacific Northwest and Northern Rockies.
1127 AM CST Mon Dec 4 2023 (Today and tonight) Water vapor imagery currently shows the upper level trough over the central Midwest where it is expected to track into the eastern region by Monday afternoon. Tonight as the next upper level system digs southward an associated cold front will quickly sweep through the FA.
(Tonight) A narrow ridge of high pressure over the OH into the lower MS valley will shift southeast tonight, lowering wind speeds quickly early this evening. Lows should dip into the lower to middle 30s.
(Through Tuesday) A dry, reinforcing cold front will push through the area overnight tonight into early Tuesday morning. This will cause winds to become more northwesterly overnight and bring much cooler and drier air to the region. High temperatures tomorrow are forecast in the low to mid 60s with mostly sunny skies.
Winds will gradually become southwest across much of the area this afternoon as high pressure shifts to the east.
136 PM EST Mon Dec 4 2023 High pressure will build into the area tonight.
High pressure over north Texas will provide dry weather and seasonal temperatures with highs this afternoon in the mid 50s to around 60 degrees.
1018 AM MST Mon Dec 4 2023 - Very light snow and windy in the higher mountains today.
A weak cold front moved through the Four State Region late last night and the battle between weak post frontal cold air advection and diurnal heating is well under way. Sfc ridging well to our west this morning will quickly move ovhd this evening into the overnight hours with the pressure gradient expected to relax quickly later today. 13 (Monday through Tuesday) Another cold front is moving across the area this morning and should exit to the southeast near or shortly after daybreak. I wouldn't be surprised to see a couple of overnight lows near or just below freezing in Southeast Oklahoma and adjacent portions of Southwest Arkansas. Yet another cold front should begin to move across the region around midday Tuesday. This should keep daytime high temperatures limited to the lower 60s across Southeast Oklahoma and much of Southwest Arkansas.
With sfc temperatures near to above freezing, am not seeing much in the way of accumulations, probably less than an inch. At that time a ridge aloft builds strongly across the Rockies and into the Northern Plains. The initial upper flow pattern in this period will feature a significant upper ridge over the Plains and central CONUS during the mid-week time frame.
The first of two expected over the next 24 to 30 hours, a cold front is sweeping south through the Central FL peninsula in response to a weakening system moving off the Mid-Atlantic region. While this boundary kicks off the cooler and drier weather, the initial change is minor.
(This evening through Tuesday) A dry cold front is currently moving through the area associated with a clipper system crossing the Southern Appalachians. High pressure briefly builds in tonight, resulting in calm winds and good radiational cooling conditions. Another clipper system moves through the Ohio and Lower Tennessee Valleys tomorrow within the eastern CONUS trough. Increased westerly winds ahead of the associated cold front will cause temperatures to warm above guidance tomorrow, similar to today.
Temperatures have warmed in response into the lower to middle 50s at this hour, with highs expected to reach the upper 50s.
325 PM EST Mon Dec 4 2023 A trough of low pressure will linger along the coast this evening before exiting the area tonight.
1118 AM CST Mon Dec 4 2023 (Today and tonight) The cold front has pushed through the area, and high temperatures today are expected to be just a touch cooler than yesterday, but still above average for this time of year.
A weak cold front will move into the area Tuesday morning, then become diffuse across the area during the afternoon.
(Tonight) Cold front currently through NW KS will sweep southward across the forecast overnight.
(This evening through Tuesday) Yet another upper level short wave trough is moving southeastward across the northern and central Plains this afternoon and will approach the western Great Lakes by sunrise Tuesday. There will be enough impetus from this trough to push a weak cold front through the forecast area tonight. As the upper trough moves further into the Great Lakes region on Tuesday and weak upper level ridging builds overhead, modest north winds will circle around to east and southeast by the end of the day.
(This evening through Tuesday night) Upper level trough exiting to the east with northwest flow dominating from early to mid week. There will be a little disturbance embedded in the northwest flow will kick a weak cold front through tonight.
After a cool Monday morning with lows in the 30s and 40s, temperatures will rise to the low to mid 60s this afternoon. Another weak cold front will arrive during the day tomorrow, with little to no effect other than a wind shift to the north.
1146 AM MST Mon Dec 4 2023 - Very light snow and windy in the higher mountains today.
Dry and warmer conditions then follow for the second half of the week. Precipitation into the afternoon will trend lighter and more narrowed near the low level surface reflection tracking southeast through central and southern portions of the forecast area.
A weak cold front will enter our region tonight aided by the northern CONUS troughs but this has little impact on our overall weather. Most locations fell to near freezing early this morning but temperatures have quickly recovered so far this afternoon. Tonight a weak cold front enters the region with light northerly winds and clear skies across northern portions of the area. Expect chilly temperatures in the low to mid 30s across the bulk of the area north of the Pecos with more 40s to the south.
837 AM MST Mon Dec 4 2023 Current observations shows a cold front draped across southern Montana along with an upper level wave passing off to our east.
/96 (Now through Tuesday) A northwest flow aloft will continue in the wake of a cold front. A weak reinforcing cold front will pass through the area on Tuesday, however no rain is expected due to the very dry airmass in place. Highs on Tuesday will be cooler behind the front, generally in the low 60s.
1042 AM EST Mon Dec 4 2023 A cold front will move offshore later today, with high pressure building in for tonight.
At the surface light easterly to northerly winds will prevail as high pressure builds.
1151 AM CST Mon Dec 4 2023 - A cold front will move through the region this afternoon bringing the chance (~30%) for sprinkles/drizzle.
1100 AM MST Mon Dec 4 2023 Updated Aviation Discussion Current observations shows a cold front draped across southern Montana along with an upper level wave passing off to our east.
343 PM EST Mon Dec 4 2023 High pressure will build into the area tonight.
Current satellite imagery shows the mid level clouds clearing slowly from north to south, making the low clouds from Grand Forks to Pembina visible again.
1130 AM CST Mon Dec 4 2023 (Today through Tuesday) A comfortable start to the week is expected across Deep South Texas with high pressure in control. Highs top off a couple of degrees warmer than yesterday into the upper 70s both today and Tuesday, with lows also gaining a degree or two into the upper 50s or low 60s across the RGV and low 50s across the ranchlands.
What remains of a cold front, which passed through last night, will transition to a warm front later this morning as it shifts northeast. The upper level ridge continues to expect northeast tonight and Tuesday bring drier, warmer and more stable conditions.
Upper ridge is becoming more amplified over the western CONUS with a closed low deepening near the Gulf of Alaska. A regional view of radar shows a narrow band of light precip across northern NE moving southward, and recent CAMs have trended toward bringing this into our area this evening as the trough passes just to our northeast. Forecast soundings depict enough dry air in the low levels that it would seem difficult to get much rain to reach the ground, but both deterministic and ensemble data in the short-term have increased chances of measurable precip.
* Big warmup late this week with temperatures looking to be about 10- 15 degrees warmer than normal. Surface ridging extends from the Plains states northward into Wisconsin this afternoon, keeping things dry and winds light. Temperature profiles support all rain for most, though slightly cooler temperatures near freezing north of I-74 could allow snow to mix in at times.
A weak upper ridge across S TX today will continue to flatten tonight as a long wave trough draped across Mexico and W TX, gradually moves east across S TX Tuesday and Tuesday night. Despite the upper trough moving across the area, precipitation is not anticipated due to the lack of moisture.
A low pressure circulation off the Canadian coast and a ridge of high pressure over the western U. The high pressure ridge will keep flow aloft southwesterly, and high heights associated with this feature will result in atypically warm temperatures. With high pressure over the Northern Rockies and low pressure staying put in the Pacific, dynamics for ascent will be weak.
That was has passed by but a weak cold front is still located south of the Ohio River with ample cloud cover over the northwest half of the CWA. Surface temperatures will remain at or above freezing and no accumulations are expected.
(This evening through Tuesday Night) Pretty quiet short term forecast resulting from upper troughing across the Great Lakes into the Mid Miss Valley and broad upper ridging aross the Four Corners Region of the Country. Should see very similar conditions on Tuesday that we have seen today, but perhaps just a little warmer with continued west to northwest winds at the surface. While we stayed on the higher side of guidance concerning daytime high temperatures on Tuesday, did not go quite as warm as MAVMOS guidance, instead between MAV and NBM output.
Winds should continue the trend of switching more northwesterly today which will bring in slightly cooler air and eventually more cloud coverage along with temperatures within a few degrees of what we experienced yesterday. Since then cloud cover has increased and a warm front is approaching from the southwest. Meanwhile there are light showers moving into west Tennessee ahead of a cold front.
1136 AM CST Mon Dec 4 2023 (Today through Tuesday) Surface obs, regional radar, and infrared satellite imagery show a cold front rapidly pushing southward early this morning into the Hill Country. Temperatures should dip into the 30s for most of the Hill Country and the lower to middle 40s for the rest of us.
Otherwise, high pressure will dominate the region for much of the upcoming week. A compact upper low over the TN Valley will devolve into an open wave trough as it traverses the southern Appalachians later this morning and then across the area during the afternoon/early evening. Lows in the lower to middle 30s across the NC Piedmont and northern coastal plain counties to upper 30s/near 40 south. Another mid/upper level disturbance and upper trough will approach then cross the region later Tuesday and Tuesday night.
1245 PM MST Mon Dec 4 2023 A strong ridge will continue to build over the region through the middle of the workweek leading to a strong warming trend.
1143 AM CST Mon Dec 4 2023 (Today through Tuesday Night) An upper lvl ridge is beginning to amplify over the Western region of the CONUS with northwesterly flow aloft over Arkansas. At the sfc, a high pressure center will be located across north-central Texas. The region has seen a couple dry FROPAs that have ushered in a drier and cooler airmass into the region. On Tuesday, the upper lvl ridge will slide eastward, but remain over situated over the Desert Southwest region of the CONUS. At the sfc, a moisture starved or dry cold front will move through the state on Tuesday.
Temperatures along the Island Chain are in the lower to mid 80s with dew points in the mid 70s. This front will also bring slight relief in terms of the dew points and slightly cooler temperatures.
After a cool Monday morning with lows in the 30s and 40s, temperatures will rise to the low to mid 60s this afternoon. Another weak cold front will arrive during the day tomorrow, with little to no effect other than a wind shift to the north. /Issued 230 AM CST Mon Dec 4 2023/ /Tuesday Night and Beyond/ Surface winds will lighten Tuesday night behind the cold front that moved through North and Central Texas during the day. With clear skies, expect another chilly night with overnight lows in the mid to upper 30s across much of the region, possibly approaching freezing near the Red River.
352 PM EST Mon Dec 4 2023 A dry cold front will move through tonight.
521 PM CST Mon Dec 4 2023 (This evening through Tuesday Night) Pretty quiet short term forecast resulting from upper troughing across the Great Lakes into the Mid Miss Valley and broad upper ridging aross the Four Corners Region of the Country. Should see very similar conditions on Tuesday that we have seen today, but perhaps just a little warmer with continued west to northwest winds at the surface. While we stayed on the higher side of guidance concerning daytime high temperatures on Tuesday, did not go quite as warm as MAVMOS guidance, instead between MAV and NBM output.
629 PM EST Mon Dec 4 2023 (Through Tuesday) A dry, reinforcing cold front will push through the area overnight tonight into early Tuesday morning. This will cause winds to become more northwesterly overnight and bring much cooler and drier air to the region. High temperatures tomorrow are forecast in the low to mid 60s with mostly sunny skies.
With the upper level trough expected to swing through this evening, there will be enough lift to promote a bit of light snow. It's not out of the question that some areas of drizzle or freezing drizzle could develop at times later this evening, mixed with the light snow. This low-level saturation may also create some patchy fog. As the trough passes through, winds will gradually switch from S/SW to NW overnight.
A strong ridge will continue to build over the region through the middle of the workweek leading to a strong warming trend.
High pressure is building in across the area. Winds are slightly breezy across the area and are expected to drop off overnight as the high pressure ridging moves overhead across our area. There is ample low-level moisture due to melting snow with the higher temperatures, especially for the Eastern Magic valley and Snake plain. Expect patchy fog tonight into Tuesday morning due to ample low-level moisture and high pressure ridging.
High temperatures will be in the low to mid 60s in the afternoon.
Thermal profiles continue to support largely rain, despite surface temperatures just a few degrees above freezing already from around the I-74 corridor northward. * Big warmup late this week with temperatures looking to be about 10- 15 degrees warmer than normal. Surface ridging extends from the Plains states northward into Wisconsin this afternoon, keeping things dry and winds light. Temperature profiles support all rain for most, though slightly cooler temperatures near freezing north of I-74 could allow snow to mix in at times.
Ridging will build through mid-to- late week, keeping temperatures above average for much of the area. A series of systems will move through to our north later this week into this weekend, bringing breezy conditions and cooler temperatures to the area.
520 PM CST Mon Dec 4 2023 (This evening through Tuesday) Yet another upper level short wave trough is moving southeastward across the northern and central Plains this afternoon and will approach the western Great Lakes by sunrise Tuesday. There will be enough impetus from this trough to push a weak cold front through the forecast area tonight. As the upper trough moves further into the Great Lakes region on Tuesday and weak upper level ridging builds overhead, modest north winds will circle around to east and southeast by the end of the day.
High pressure will build back into the region later today into Tuesday. Warming aloft continues as a ridge builds overhead.
421 PM MST Mon Dec 4 2023 This afternoon a cold front is moving over the Central High Plains, bringing in breezy northwest winds with gusts up to 30-35 mph. Tomorrow the area will be under northwest flow aloft as a ridge of high pressure moves over the Western CONUS.
601 PM CST Mon Dec 4 2023 (This evening through Tuesday) A dry cold front is currently moving through the area associated with a clipper system crossing the Southern Appalachians. High pressure briefly builds in tonight, resulting in calm winds and good radiational cooling conditions. Another clipper system moves through the Ohio and Lower Tennessee Valleys tomorrow within the eastern CONUS trough. Increased westerly winds ahead of the associated cold front will cause temperatures to warm above guidance tomorrow, similar to today.
529 PM CST Mon Dec 4 2023 (Tonight) Cold front currently through NW KS will sweep southward across the forecast overnight.
Overnight, expect temperatures to fall near freezing.